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Siemens Argus 7SR11, Manual

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7SR11 & 7SR12 Applications Guide 

©2017 Siemens Protection Devices Limited  

 

Chapter 7 Page 47 of 48 

5.4.2 

Close Circuit Supervision Connections 

 

R

BI

+ve

-ve

+

BO 1

BO n

Remote 
Alarm

BO

R

CLOSE 

COIL

52a

52b

-

Circuit

Breaker

H5 Scheme Notes:

BI = 19V (30, 48, 110, 220V supply)
BI = 88V (110, 220V supply)
R = 3K3 typical

CLOSE CCT n FAIL

 

 

Figure 5.4-4 Close Circuit Supervision Scheme 

 

Close circuit supervision with the circuit breaker Open or Closed. 

 

5.5 

Inrush Detector (81HBL2) 

This element detects the presence of high levels of 2nd Harmonic current which is indicative of transformer Inrush 
current at switch-on. These currents may be above the operate level of the overcurrent elements for a short 
duration and it is important that the relay does not issue an incorrect trip command for this transient network 
condition. 

If a magnetic inrush condition is detected operation of the overcurrent elements can be blocked. 

Calculation of the magnetising inrush current level is complex. However a ratio of 20% 2

nd

  Harmonic to 

Fundamental current will meet most applications without compromising the integrity of the Overcurrent protection. 

There are 3 methods of detection and blocking during the passage of magnetising inrush current. 

 

Phase 

Blocking only occurs in those phases where Inrush is detected. 

Large, Single Phase Transformers – Auto-transformers. 

Cross 

All 3-phases are blocked if Inrush is detected in any phase. 

Traditional application for most Transformers but can give delayed operation for Switch-
on to Earth Fault conditions. 

Sum 

Composite 2nd Harmonic content derived for all 3-phases and then compared to 
Fundamental current for each individual phase. 

Provides good compromise between Inrush stability and fast fault detection. 

 

Table 5-4 

Magnetic Inrush Bias 

 

5.6 

Broken Conductor / Load Imbalance (46BC) 

Used to detect an open circuit condition when a conductor breaks or a mal-operation occurs in phase segregated 
switchgear. 

There will be little or no fault current and so overcurrent elements will not detect the condition. However the 
condition can be detected because there will be a high content of NPS (unbalance) current present. 

Summary of Contents for Argus 7SR11

Page 1: ...Energy Management 7SR11 7SR12 Argus Overcurrent Relay Reyrolle Protection Devices ...

Page 2: ......

Page 3: ...model or article be reproduced from this document unless Siemens Protection Devices Limited consent While the information and guidance given in this document is believed to be correct no liability shall be accepted for any loss or damage caused by any error or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2014 Siemen...

Page 4: ...7SR11 7SR12 Argus Contents 2015 Siemens Protection Devices Limited Page 2 of 2 ...

Page 5: ...ny and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Description of Operation Document Release History This document is issue 2017 05 The list of revisions up to and including this issue is 2017 05 Universal PSU introduced Clauses added to suit IEC 60255 27 2017 04 Universal PSU introduced and Software maintenance 2017 02 Minor mods General pickup added F...

Page 6: ...H80003 R2c 2b 7SR12 2436H80004 R2c 2b Further improvement to startup routines 2013 01 7SR11 2436H80003 R2b 2b 7SR12 2436H80004 R2b 2b Frequency Hz added to Fault Record minor Fault Record corrections Default Control password added Improvement to startup routines to prevent loss of data 2012 01 7SR11 2436H80003 R2a 2a 7SR12 2436H80004 R2a 2a Power on counter added Data Comms improvements 2011 06 7S...

Page 7: ... Earth Fault Protection 50G 40 3 3 3 Time Delayed Measured Earth Fault Protection 51G 41 3 4 Current Protection Sensitive Earth Fault 67SEF 51SEF 50SEF 42 3 4 1 Directional Control of Sensitive Earth Fault Protection 67SEF 7SR12 42 3 4 2 Instantaneous Sensitive Earth Fault Protection 50SEF 43 3 4 3 Time Delayed Sensitive Earth Fault Protection 51SEF 45 3 5 Current Protection High Impedance Restric...

Page 8: ...74TCS 74CCS 78 5 6 2nd Harmonic Block Inrush Restraint 81HBL2 phase elements only 79 Section 6 Other Features 80 6 1 Data Communications 80 6 2 IEC 61850 Communications 80 6 3 Maintenance 80 6 3 1 Output Matrix Test 80 6 3 2 CB Counters 81 6 3 3 I 2 t CB Wear 81 6 4 General Pickup 81 6 5 Data Storage 81 6 5 1 General 81 6 5 2 Demand 81 6 5 3 Event Records 82 6 5 4 Waveform Records 82 6 5 5 Fault R...

Page 9: ...nt 67 32 Figure 3 2 Logic Diagram Instantaneous Over current Element 33 Figure 3 3 Logic Diagram Time Delayed Overcurrent Element 34 Figure 3 4 Logic Diagram Voltage Controlled Overcurrent Protection 35 Figure 3 5 Logic Diagram Derived Directional Earth Fault Element 36 Figure 3 6 Logic Diagram Derived Instantaneous Earth Fault Element 37 Figure 3 7 Logic Diagram Derived Time Delayed Earth Fault P...

Page 10: ...gram Circuit Breaker Fail Protection 50BF 73 Figure 5 2 Logic Diagram VT Supervision Function 60VTS 75 Figure 5 3 Logic Diagram CT Supervision Function 60CTS 7SR11 76 Figure 5 4 Logic Diagram CT Supervision Function 60CTS 7SR12 77 Figure 5 5 Logic Diagram Broken Conductor Function 46BC 77 Figure 5 6 Logic Diagram Trip Circuit Supervision Feature 74TCS 78 Figure 5 7 Logic Diagram Close Circuit Supe...

Page 11: ...ted with a specific function Appropriate list is TRUE when setting selected Digital signal not visible to user internal to this element IL1 Analogue signal with signal description Common setting for multiple functions c start trip Function Individual functions are enabled when associated control input c is TRUE Common control input c for multiple functions All functions are enabled when control in...

Page 12: ...e equipment may be impaired The equipment shall be isolated or disconnected from hazardous live voltage before access to potentially hazardous live parts is affected Current Transformer Circuits The secondary circuit of a live CT must not be open circuited Non observance of this precaution can result in injury to personnel or damage to equipment External Resistors Where external resistors are conn...

Page 13: ...rsion plus additional rear electrical Ethernet RJ45 x2 E6 Case 7 7 7 C D Standard version plus additional rear optical Ethernet duplex x2 E6 Case 7 8 7 C D Protocol IEC 60870 5 103 Modbus RTU and DNP3 user selectable 2 IEC 60870 5 103 Modbus RTU DNP3 and IEC 61850 user selectable settings 7 7 Relay Cover Standard Version No Push Buttons 1 Push Buttons Down and Right Arrows 2 Protection Function Pa...

Page 14: ...ctionality No Additional Functionality A 1 4CT is configured as 3PF EF 2 4CT is configured as 3PF SEF REF 3 Functions only available in 4CT relay 4 Not available on SEF input 5 Protection function package ordering option A is only available on hardware variant 7SR1102 1XA12 XAA0 4CT 3BI 5BO 6 AC 115 V supported by devices with hardware version CC or later 7 E4 case is standard E6 case is required ...

Page 15: ...12 _CA0 74 CCS x3 74 TCS x3 86 Figure 1 2 Functional Diagram of 7SR1101 3_A12 _CA0 Relay 7SR1103 1_A12 _DA0 46 BC 46 NPS x2 37 x2 49 50 BF IL1 37 x2 49 50 BF IL2 37 x2 49 50 BF IL3 60 CTS I4 50 x2 50 AFD x2 50N x2 50 x2 50 x2 50 AFD x2 50 AFD 50 51N x2 50G x2 51G x2 50 BF 79 NOTE The use of some functions are mutually exclusive 64H 81H BL2 51c 74 CCS x3 74 TCS x3 37 86 46 BC 46 NPS x2 60 CTS 51 x2...

Page 16: ...IL1 37 x2 49 50 BF IL2 37 x2 49 50 BF IL3 60 CTS I4 50 x2 50 AFD x2 50N x2 50 x2 50 x2 50 AFD x2 50 AFD 50 51N x2 50 SEF x2 51 SEF x2 50 BF 79 NOTE The use of some functions are mutually exclusive 64H 81H BL2 51c 74 CCS x3 74 TCS x3 37 86 46 BC 46 NPS x2 60 CTS 51 x2 51 x2 51 x2 51N x2 81H BL2 Figure 1 4 Functional Diagram of 7SR1103 3_A_ _ _DA0 Relay ...

Page 17: ...A 21 22 23 24 1A 5A A B 1 2 27 28 1 2 27 28 A B Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Items shown in BOLD are ordering options Rear View Arrangement of terminals and modules BI 4 ve 3 BI 5 ve 5 BI 6 ve ve 7 1 BO 7 11 13 BO 8 15 9 BO 6 Data Comms optional BI 4 ve 3 ve 1 15 13 BO 8 11 9 BO 7 ...

Page 18: ...e 2 IEC 60870 5 103 Modbus RTU DNP3 and IEC 61850 user selectable settings 7 7 Relay Cover Standard Version No Push Buttons 1 Push Buttons Down and Right Arrows 2 Protection Function Packages Standard version Included in all models C 27 59 Under overvoltage 323 Power 32S8 Sensitive Power 37 Undercurrent 46BC3 Broken conductor load unbalance 46NPS3 Negative phase sequence overcurrent 47 Negative ph...

Page 19: ...4 CCS x3 74 TCS x3 64H 86 81 x4 Figure 1 7 Functional Diagram of 7SR1204 4_A12 _CA0 Relay 7SR1205 2_A12 _DA0 46 BC 46 NPS x2 37 x2 49 50 BF VL1 VL2 VL3 IL1 37 x2 49 50 BF IL2 37 x2 49 50 BF IL3 60 CTS 60 VTS I4 NOTE The use of some functions are mutually exclusive 67 50 x4 67 51 x4 67 50N x4 67 50 x4 67 50 x4 67 51 x4 67 51 x4 67 51N x4 67 50G x4 67 51G x4 27 59 x4 27 59 x4 27 59 x4 59N x2 50 BF 4...

Page 20: ...S 60 VTS I4 NOTE The use of some functions are mutually exclusive 67 50 x4 67 51 x4 67 50N x4 67 50 x4 67 50 x4 67 51 x4 67 51 x4 67 51N x4 67 50 SEF x4 67 51 SEF x4 27 59 x4 27 59 x4 27 59 x4 59N x2 50 BF 47 51V 51V 51V 79 74 CCS x3 74 TCS x3 64H 51c 86 81H BL2 81H BL2 37 81 x4 50 AFD x2 50 AFD x2 50 AFD x2 32 x2 32 x2 32 x2 55 x2 55 x2 55 x2 32S x2 Figure 1 9 Functional Diagram of 7SR1205 4_A_ _...

Page 21: ... 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A B 1 2 27 28 1 2 27 28 A BO 6 V1 17 19 V2 21 23 V3 25 27 Rear View Arrangement of terminals and modules Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Items shown in BOLD are ordering options B Data Comms Optional BI 4 ve 3 ve 1 15 13 BO 8 11 9 BO 7 7 5 BO 6 ...

Page 22: ...101 1 1 0 0 3 5 10 7SR1101 3 1 1 0 3 5 10 7SR1102 1 4 0 0 3 5 10 7SR1102 3 4 1 0 3 5 10 7SR1103 1 4 0 0 6 8 10 7SR1103 3 4 1 0 6 8 10 7SR1107 1 4 0 0 4 8 10 7SR1107 3 4 1 0 4 8 10 7SR1204 2 1 0 3 3 5 10 7SR1204 4 1 1 3 3 5 10 7SR1205 2 4 0 3 3 5 10 7SR1205 4 4 1 3 3 5 10 7SR1206 2 4 0 3 6 8 10 7SR1206 4 4 1 3 6 8 10 7SR1208 2 4 0 3 4 8 10 7SR1208 4 4 1 3 4 8 10 Relays are assembled from the follow...

Page 23: ...clearance a total of 242 mm 290mm depth clearance should be allowed to accommodate the bending radius of fibre optic data communications cables if fitted The complete relay assembly is withdrawable from the front of the case Contacts in the case ensure that the CT circuits and normally closed contacts remain short circuited when the relay is removed To withdraw the relay remove the plastic fascia ...

Page 24: ...ront cover The front cover is used to secure the relay assembly in the case and it is recommended that the cover is always fitted when the relay is in service Figure 2 4 Relay with standard transparent cover E6 Case with optional IEC61850 module If access is required to view the menus without removing the cover an alternative transparent cover with push buttons may be ordered With the cover in pla...

Page 25: ...ore February 2012 prior to hardware version CC cannot be operated from AC supplies and the rating is shown as DC only From hardware version CC option G devices are available which will operate normally for DC or AC supplies These 80 250 V DC 110 115 V AC devices of hardware version CC or later will operate normally for reversed polarity DC auxiliary voltages devices of previous hardware versions a...

Page 26: ...t each side of the relay which allow it to be withdrawn from the relay case The relay should not be carried by these handles Relay Information Above the LCD two labels are provided these provide the following information 1 Product Information Rating Label containing Product name MLFB ordering code with hardware version suffix Nominal current rating Rated frequency Voltage rating Auxiliary supply r...

Page 27: ...eout to be adjusted from 1 to 60 minutes and Off backlight permanently on Pressing any key will re activate the display The LCD contrast can be adjusted using a flat blade screwdriver to turn the screw located below the contrast symbol Turning the screw clockwise increases the contrast anti clockwise reduces the contrast User defined indentifying text can be programmed into the relay using the Sys...

Page 28: ...n settings files can be loaded into the relay using Reydisp When the System Config Setting Dependencies is ENABLED only the functions that are enabled will appear in the menu structure PROTECTION HEALTHY LED This green LED is steadily illuminated to indicate that DC voltage has been applied to the relay power supply and that the relay is operating correctly If the internal relay watchdog detects a...

Page 29: ...and displays current input waveforms at 1600Hz The primary CT ratio used for the relay instruments can be set in the CT VT configuration menu 2 7 Voltage Inputs Three voltage inputs are provided on the Analogue Input module on the 7SR12 relay Voltage is sampled at 1600Hz for both 50Hz and 60Hz system frequencies Protection and monitoring functions of the relay use fundamental frequency voltage mea...

Page 30: ... 1 D O Delay BI n D O Delay INPUT CONFIG BINARY INPUT CONFIG Figure 2 10 Binary Input Logic 2 9 Binary Outputs Output Relays Relays are fitted with 5 or 8 binary outputs BO All outputs are fully user configurable and can be programmed to operate from any or all of the available functions In the default mode of operation binary outputs are self reset and remain energised for a user configurable min...

Page 31: ...iating condition is still present Notes on General Pickup An output General Pickup is available to indicate that the pickup level has been exceeded for one or more protection functions Any protection function can be mapped to trigger this output in the OUTPUT CONFIG PICKUP CONFIG menu Event Output 1 Min Operate Time Hand Reset BO 1 hand reset S R Q OUTPUT CONFIG OUTPUT MATRIX Or gates Logic signal...

Page 32: ...ected starts caused by the relay watchdog Any combination of these can be selected for the start up count This is done in the MAINTENANCE MENU START COUNT menu using the Start Up Types setting All the start up types selected ticked will be added to the overall start up count The number of restarts before the alarm output is raised is set in the MAINTENANCE MENU START COUNT menu using the Start Up ...

Page 33: ...vices Limited Chapter 1 Page 29 of 88 A meter Miscellaneous Meters Unexpected Restarts is provided to show how many Unexpected Restarts have occurred during the previous Unexpected Restart Period This is resettable from the front fascia Figure 2 14 Start up Events ...

Page 34: ...binary output matrix to provide an external protection healthy signal A changeover or closed contact can be mapped via the binary output matrix to provide an external protection defective signal With the Protection Healthy this contact is open When the auxiliary DC supply is not applied to the relay or a problem is detected within the relay then this output contact closes to provide external indic...

Page 35: ... is achieved for the phase fault elements using the quadrature voltage i e at unity power factor I leads V by 90 Each phase current is compared to the voltage between the other two phases i e for normal phase sequence 1 2 3 IL1 V23 IL2 V31 IL3 V12 When the device is applied to reverse sequence networks i e 1 3 2 the polarizing is corrected internally by the Gn Phase Rotation setting in the CT VT C...

Page 36: ... 50 n has independent settings 50 n Setting for pick up current and 50 n Delay follower time delay The instantaneous elements have transient free operation Where directional elements are present the direction of operation can be set using 50 n Dir Control setting Directional logic is provided independently for each 50 n element e g giving the option of using two elements set to forward and two to ...

Page 37: ...ion 51VCO is used a multiplier is applied to this setting where the voltage drops below the setting VCO Setting see Section 3 2 A number of shaped characteristics are provided An inverse definite minimum time IDMT characteristic is selected from IEC ANSI or user specific curves using 51 n Char A time multiplier is applied to the characteristic curves using the 51 n Time Mult setting Alternatively ...

Page 38: ...51c Activation of the cold load settings 50 n Inrush Action Block Operation of the inrush current detector function 51 n VTSAction Inhibit Operation of the VT Supervision function 7SR1205 7SR1206 1 1 General Pickup 51 n 51 n Setting 51 n Charact 51 n Time Mult 51 n Delay DTL 51 n Reset c Forward Reverse 51 n Dir Control Non Dir 1 1 1 51 n Follower DTL L1 Dir En L2 Dir En L3 Dir En L1 Dir En L2 Dir...

Page 39: ...he 51 n pickup current setting 51 n Multiplier is applied to each phase independently when its control phase phase voltage falls below VCO Setting The voltage levels used for each phase over current element are shown in the table below Relays with a Ph N connection automatically calculate the correct Ph Ph control voltage Current Element Control Voltage IL1 V12 IL2 V23 IL3 V31 The Voltage Controll...

Page 40: ...ovide a zero sequence path or an open delta VT connection the earth fault element can use zero sequence voltage and current for polarisation If zero sequence polarising voltage is not available e g when a two phase phase to phase connected VT is installed then negative sequence voltage and negative sequence currents must be used The type of VT connection is specified by Voltage Config CT VT CONFIG...

Page 41: ...n function 7SR1205 7SR1206 50N n c 50N n Setting If directional elements are not present this block is omitted and the 50N n Dir En signal is set TRUE Forward Reverse 50N n Dir Non Dir 1 50N n Dir En 67N Fwd 67N Rev 50N n Delay 50N n VTS Action Off Non Dir Inhibit VT Fail 1 IL1 IL2 IL3 IN Inhibit 50N n 50N n Element Enabled Disabled 81HBL2 50N n Inrush Action Off Inhibit 50N n Dir En General Picku...

Page 42: ...1N n element Operation of the time delayed earth fault elements can be inhibited from Inhibit 51N n A binary or virtual input 79 E F Inst Trips 51N n When delayed trips only are allowed in the auto reclose sequence 79 E F Prot n Trip n Delayed 50 n Inrush Action Block Operation of the inrush current detector function 51N n VTSAction Inhibit Operation of the VT Supervision function 7SR1205 7SR1206 ...

Page 43: ...g voltage must be adjusted such that the directional detector gives maximum sensitivity in the forward operate zone when the current is in phase with it The reverse operate zone is the mirror image of the forward zone The measured directional earth fault elements use zero phase sequence ZPS polarising Voltage polarisation is achieved for the earth fault elements by comparison of the appropriate cu...

Page 44: ...the option of using two elements set to forward and two to reverse Operation of the instantaneous measured earth fault elements can be inhibited from Inhibit 50G n A binary or virtual input 79 E F Inst Trips 50G n When delayed trips only are allowed in the auto reclose sequence 79 E F Prot n Trip n Delayed 50 n Inrush Action Block Operation of the inrush current detector function 50G n VTSAction I...

Page 45: ...ut see Applications Guide A minimum operate time for the characteristic can be set using 51G n Min Operate Time setting A fixed additional operate time can be added to the characteristic using 51G n Follower DTL setting Where directional elements are present the direction of operation can be set using 51G n Dir Control setting Directional logic is provided independently for each 51G n element e g ...

Page 46: ...tion is achieved for the earth fault elements by comparison of the appropriate current with its equivalent voltage I0 V0 The characteristic angle can be user programmed to any angle between 95 and 95 using the 67SEF Char Angle setting The voltage is the reference phasor Vref and the 67SEF Char Angle setting is added to this to adjust the forward and reverse zones The centre of the forward zone is ...

Page 47: ...taneous earth fault elements can be inhibited from Inhibit 50SEF n A binary or virtual input 79 SEF Inst Trips 50SEF n When delayed trips only are allowed in the auto reclose sequence 79 SEF Prot n Trip n Delayed 50SEF n VTSAction Inhibit Operation of the VT Supervision function 7SR1205 7SR1206 Directional elements will not operate unless the zero sequence voltage V0 is above the 67SEF Minimum Vol...

Page 48: ...ensated angle Wattmetric Inhibit Wattmetric V0 I4 ISEF 3I0 cos θ θc 50SEF n c 50SEF n Setting 50SEF n Delay I4 ISEF General Pickup Inhibit 50SEF n 50SEF n Element Enabled Disabled 50SEF n Dir En 79 P F Inst Trips 50SEF n 79 P F Prot n Trip n Delayed AUTORECLOSE Ires Select Ires Real Ires 3I0 cos θ θc Wattmetric Block 67SEF Charact angle Wattmetric Block 67SEF Wattmetric Power Figure 3 13 Logic Dia...

Page 49: ...n Follower DTL setting Where directional elements are present the direction of operation can be set using 51SEF n Dir Control setting Directional logic is provided independently for each 51SEF n element e g giving the option of using two elements set to forward and two to reverse Operation of the time delayed earth fault elements can be inhibited from Inhibit 51SEF n A binary or virtual input 79 S...

Page 50: ...r Control Non Dir 1 51SEF n Dir En 67SEF Fwd 67SEF Rev 51SEF n VTS Action Off Non Dir Inhibit VT Fail 1 I4 ISEF Inhibit 51SEF n 51SEF n Element Enabled Disabled 51SEF n Dir En 79 P F Inst Trips 51SEF n 79 P F Prot n Trip n Delayed AUTORECLOSE Ires Select Ires Real Ires 3I0 cos θ θc Wattmetric Block Compensated angle Wattmetric Inhibit Wattmetric V0 I4 ISEF 3I0 cos θ θc 67SEF Charact angle Wattmetr...

Page 51: ...be applied for a period following circuit switch in The Cold Load settings are applied after the circuit breaker has been open for longer than the Pick Up Time setting Following circuit breaker closure the cold load overcurrent settings will revert to those defined in the Phase Overcurrent menu 51 n after either elapse of the Drop Off Time setting or when the measured current falls below the Reduc...

Page 52: ...quence is corrected automatically by the Gn Phase Rotation setting in the CT VT Config menu Two NPS current elements are provided 46IT and 46DT The 46IT element can be configured to be either definite time lag DTL or inverse definite minimum time IDMT 46IT Setting sets the pick up current level for the element A number of shaped characteristics are provided An inverse definite minimum time IDMT ch...

Page 53: ...ts are provided 37 1 37 2 for phase currents and two for the earth or sensitive earth fault input 37G 1 37G 2 or 37SEF 1 37SEF 2 Each phase has an independent level detector and current timing element 37 n Setting sets the pick up current An output is given after elapse of the 37 n Delay setting An output is also given to indicate the operated phase All under current elements work with True RMS cu...

Page 54: ...onditions are calculated using the measure True RMS current Should the current rise above the 49 Overload Setting for a defined time an output signal will be initiated The operating time is a function of thermal time constant 49 Time Constant and previous current levels Operate Time t 2 B 2 2 P 2 I k I I I t ln τ Where T Time in minutes τ 49 Time Constant setting minutes In Log Natural I measured ...

Page 55: ...Setting c cap alarm trip IL2 IL3 cap alarm trip cap alarm trip Inhibit 49 49 Therm Overload Enabled Disabled 1 1 Reset 49 r Figure 3 22 Logic Diagram Thermal Overload Protection 49 3 10 Current Protection Line Check 50LC 50G LC and 50SEF LC Only software option C This feature prevents a CB being repeatedly manually closed onto a faulted line It is enabled upon the Manual CB Close output being issu...

Page 56: ...EF LC n c I4 SEF Inhibit 50SEF LC n 50SEF LC n Setting Enabled Disabled 50SEF LC n Element 50SEF LC n Delay Close CB Pulse Reclaim Timer period Line Check 1 Figure 3 24 Logic Diagram 50SEF Line Check Elements 50SEF LC 1 50 LC n 50 LC n Setting c c 50 LC n Delay c c IL1 IL2 IL3 50 51 Measurement L1 81HBL2 Off Inhibit L2 81HBL2 L3 81HBL2 50 n Inrush Action Inhibit 50 LC n Enabled Disabled 50 LC n El...

Page 57: ... via the 7XG31xx series of equipment being connected to the binary inputs Should the sensor operate when the phase current is above the 50AFD Setting in any phase then an output signal will be initiated Refer to 7XG31 documentation for further details AFD Zone 1 Flash AFD Zone 6 Flash Enabled Disabled 50AFD Setting c IA IB IC 50AFD AFD Zone 1 AFD Zone 6 Arc Detector Binary Input Or GOOSE message 5...

Page 58: ...The 27 59 n O P Phases setting determines whether the time delay is initiated for operation of any phase or only when all phases have detected the appropriate voltage condition An output is given after elapse of the 27 59 n Delay setting The 27 59 n Hysteresis setting allows the user to vary the pick up drop off ratio for the element Operation of the under over voltage elements can be inhibited fr...

Page 59: ...ral Overvoltage 59N 7SR12 Two Neutral Overvoltage or Neutral Voltage Displacement elements are provided 59NIT 59NDT The relay utilises fundamental voltage measurement values for this function The element can use a direct measurement 3Vo connection from the voltage transformer or calculate values from a phase to neutral connections from the voltage transformer The 59NIT element can be configured to...

Page 60: ...5 limb VT or 3 single phase VTs The VT primary winding neutral must be earthed to allow the flow of zero sequence current Inhibit 59IT 59NIT 59NIT Setting 59NIT Charact 59NIT Time Mult 59NIT Delay DTL 59NIT Element Enabled Disabled 59NIT Reset VL1 VL2 VL3 ZPS Filter 59NDT c 59NDT Setting 59NDT Delay Inhibit 59NDT 59NDT Element Enabled Disabled 3Vo General Pickup General Pickup c Pickup trip Figure...

Page 61: ...Input mode setting Frequency elements are blocked if all phase voltages fall below the 81 U V Guard setting The sense of the element under frequency or over frequency is set by the 81 n Operation setting 81 n Setting sets the pick up voltage level for the element An output is given after elapse of the 81 n Delay setting The 81 n Hysteresis setting allows the user to vary the pick up drop off ratio...

Page 62: ...er pick up level or on the total power of all three phases An output is given after elapse of the Gn 32 n Delay setting Operation of the under over power elements can be inhibited when The measured current is below the Gn 32 n U C Guard setting A VT Fail condition is detected Inhibit 32 n A binary or virtual input V1 IL1 V2 V3 IL3 IL2 Enabled Enabled En Inhibit VT Fail W VAr W VAr W VAr W VAr Gn32...

Page 63: ...is measured Gn 32S n Setting sets the pick up power level for the element Under power or over power operation can be set by the Gn 32S n Operation setting An output is given after elapse of the Gn 32S n Delay setting Operation of the under over power elements can be inhibited when The measured current is below the Gn 32S U C Guard setting A VT Fail condition is detected Inhibit 32S n A binary or v...

Page 64: ...erage power factor of all three phases An output is given after elapse of the Gn 55 n Delay setting Operation of the power factor elements can be inhibited when The measured current is below the Gn 55 U C Guard setting A VT Fail condition is detected Inhibit 55 n A binary or virtual input V1 IL1 V2 V3 IL3 IL2 Enabled Enabled En Inhibit VT Fail W VAr W VAr W VAr W VAr Gn55 n Operation Under Over Gn...

Page 65: ...y input if both are raised the auto reclose will be Out of Service Knowledge of the CB position status is integral to the auto reclose functionality CB auxiliary switches must be connected to CB Closed and CB Open binary inputs A circuit breaker s service status is determined by its position i e from the binary inputs programmed CB Open and CB Closed The circuit breaker is defined as being in serv...

Page 66: ...with independently configurable type of Protection Trip Overcurrent and earth fault elements can be assigned to any combination of Fast Inst Delayed or highset HS trips Deadtime Delay time settings are independent for each AR shot The user has programming options for Auto Reclose Sequences up to the maximum shot count i e Inst or Delayed Trip 1 DeadTime 1 0 1s 14400s Inst or Delayed Trip 2 DeadTim...

Page 67: ...mber of AutoReclose attempts in a sequence 79 Retry Enable Enabled configures the relay to perform further attempts to automatically Close the Circuit Breaker where the CB has initially failed to close in response to a Close command If the first attempt fails the relay will wait for the 79 Retry Interval to expire then attempt to Close the CB again 79 Retry Attempts Sets the maximum number of retr...

Page 68: ...is active At the end of the 79 Reclose Blocked Delay due to presence of a persistent Block signal When the 79 Elem HS Trips to Lockout count is reached When the 79 Elem Delayed Trips to Lockout count is reached An alarm output is provided to indicate last trip to lockout Once lockout has occurred an alarm 79 Lockout is issued and all further Close commands except manual close are inhibited If the ...

Page 69: ...ip5 The fifth and last protection Trip in the P F sequence can be set to either Inst or Delayed 79 P F HighSet Trips to Lockout Sets the number of allowed HighSet trips The relay will go to Lockout on the last HighSet Trip This function can be used to limit the duration and number of high current trips that the Circuit Breaker is required to perform if the fault is permanent and close to the Circu...

Page 70: ...ich can be mapped to a Binary output to Block an External Protection s fourth Trip Output 79 P F Deadtime 4 Sets the fourth Reclose Delay Deadtime in the External sequence 79 P F Prot n Trip5 Not Blocked Blocked Blocked raises an output which can be mapped to a Binary output to Block an External Protection s fifth Trip Output 79 P F Extern Trips to Lockout Sets the number of allowed External prote...

Page 71: ...empts 79 Retry Interval Close CB Pulse Block Close CB Reclaim Timer 79 Successful AR 79 Block Reclose AND 79 Reclose Blocked Delay Elapsed Starter raised in Reclaim Time Reclaim Time Elapsed Lockout Reset Sequence Fail Timer Elapsed Increment Close Count Close Pulse Expired Close CB AR Started CB Closed 79 Elem Prot Trip n LOCKOUT RESET 79 Minimum LO Delay 79 Reset LO by Timer Manual Close CB Clos...

Page 72: ... towards zero Only when the delay reaches zero will the close command be issued and related functionality initiated Blocked Close Delay The close command may be delayed by a Block Close CB signal applied to a binary input This causes the feature to pause before it issues the CB close command and can be used for example to delay CB closure until the CB energy has reached an acceptable level If the ...

Page 73: ... open at the end of the reclaim time or a protection operates during the final reclaim time CB Control Trip Time When this is set to Enabled the relay will measure the CB trip time following operation of either a CB control open output or a CB Trip output The trip time is displayed by the MAINTENANCE METERS CB Trip Time meter When this is set to Disabled the relay will measure the trip time follow...

Page 74: ...ockout Delay timer can be set to delay a too fast manual close after lockout this prevents an operator from manually closing onto the same fault too quickly and thus performing multiple sequences and possibly burning out Plant 79 Reset LO by Timer Only in Auto reclose models Set to Enabled this ensures that the Lockout condition is reset when the timer expires Lockout indication will be cleared ot...

Page 75: ...al I O de energised Example Showing Use of Nomenclature E1 I1 V1 O2 L1 Equation 1 Binary Input 1 XOR Virtual I O 1 AND NOT Binary Output 2 OR LED 1 When the equation is satisfied 1 it is routed through a pick up timer En Pickup Delay a drop off timer En Dropoff Delay and a counter which instantaneously picks up and increments towards its target En Counter Target The counter will either maintain it...

Page 76: ...PU DO Timers Counter Reset Mode Off When the count value En Counter Target the output of the counter En 1 and this value is held until the initiating conditions are removed when En is instantaneously reset The output of En is assigned in the OUTPUT CONFIG OUTPUT MATRIX menu where it can be programmed to any binary output O LED L or Virtual Input Output V combination Protection functions can be use...

Page 77: ...any of the 3 phase currents are above the 50BF Setting or the current in the fourth CT is above 50BF I4 for longer than the 50BF n Delay setting or for a mechanical protection trip the circuit breaker is still closed when the 50BF n Delay setting has expired indicating that the fault has not been cleared Both 50BF 1 and 50BF 2 can be mapped to any output contact or LED An output is also given to i...

Page 78: ...er than 60VTS Delay 3 PHASE FAILURE DETECTION Under normal load conditions rated PPS voltage would be expected along with a PPS load current within the circuit rating Where PPS load current is detected without corresponding PPS voltage this could indicate a three phase VT failure To ensure these conditions are not caused by a 3 phase fault the PPS current must also be below the fault level The ele...

Page 79: ...rig S R Q 1 60VTS Operated 60VTS Inhibit 1 or 2 Phase Fail V V Setting I I Setting V1 Vpps Setting I1 Ipps 3 Phase Fail I1 Ipps Load External Trigger 60VTS Ext_Reset External Reset 60VTS Delay NPS ZPS 60VTS Component VL1 VL2 VL3 Phase Seq Filter IL1 IL2 IL3 Phase Seq Filter V2 V0 I2 I0 V1 I1 Figure 5 2 Logic Diagram VT Supervision Function 60VTS ...

Page 80: ...from Inhibit 60CTS A binary or virtual input 60CTS Delay IL1 IL2 IL3 60CTS I Any 2 phases but not all 3 Inhibit 60CTS 60CTS Element Enabled Disabled 60CTS Operated Figure 5 3 Logic Diagram CT Supervision Function 60CTS 7SR11 This function is retained in the 7SR12 as it provides phase discrimination whereas the standard function provided in the 7SR12 does not 5 3 2 60CTS FOR 7SR12 Normally the pres...

Page 81: ...r 46BC The element calculates the ratio of NPS to PPS currents Where the NPS PPS current ratio is above 46BC Setting an output is given after the 46BC Delay The Broken Conductor function can be inhibited from Inhibit 46BC A binary or virtual input 46BC U I Guard A minimum load current Inhibit 46BC 46BC 46BC Element Enabled Disabled c 46BC Setting IL1 IL2 IL3 NPS Filter I2 IL1 IL2 IL3 PPS Filter I1...

Page 82: ... loss of supply an output is given The 74TCS n Delay setting prevents failure being incorrectly indicated during circuit breaker operation This delay should be greater than the operating time of the circuit breaker The use of one or two binary inputs mapped to the same Trip Circuit Supervision element e g 74TCS n allows the user to realise several alternative monitoring schemes TCS n Enabled Disab...

Page 83: ...r to select between Phase Sum and Cross methods of measurement Phase Each phase is inhibited separately Sum With this method the square root of the sum of the squares of the second harmonic in each phase is compared to each operate current individually Cross All phases are inhibited when any phase detects an inrush condition An output is given where the measured value of the second harmonic compon...

Page 84: ...EC61850 is provided with an added EN100 communication module The following EN100 output alarms are provided EN100 Life When the relay is powered up the EN100 Module initializes with the relay When initialization is successful this point becomes true EN100 Error During relay operation if an error occurs with the data communication between the EN100 module and the relay this point becomes true This ...

Page 85: ...estimation of contact wear and maintenance requirements The algorithm works on a per phase basis measuring the arcing current during faults The I2t value at the time of trip is added to the previously stored value and an alarm is given when any one of the three phase running counts exceeds the set Alarm limit The t value is the time between CB contacts separation when an arc is formed Separation T...

Page 86: ...g the Reydisp software tool For a complete listing of events available in each model refer to Technical Manual Section 4 Data Communication 6 5 4 WAVEFORM RECORDS Relay waveform storage can be triggered either by user selected relay operations from the relay fascia from a suitably programmed binary input or via the data comms channel s The stored analogue and digital waveforms illustrate the syste...

Page 87: ...button to return to the home screen 4 Pressing the TEST RESET button one further time will reset the relay With the Trip Alert setting disabled the user only has to press the trip reset button once to reset the relay When examined together the event records and the fault records will detail the full sequence of events leading to a trip Fault records are stored in a rolling buffer with the oldest f...

Page 88: ... cycled during a storage cycle some of the data will be lost For this reason the Relay can provide a visual warning at the top right position of the LCD that data storage is taking place The œ disk symbol shows that the copying of Events Waveform Records or Fault Records to non volatile disk storage is currently in progress Whether this symbol is displayed or not is set by the SYS CONFIG Disk Acti...

Page 89: ...d Enabled Event Records Enabled Enabled Enabled Fault Information Enabled Enabled Enabled Setting Information Enabled Enabled Enabled Each Communication port has a setting to allow the user to determine which port is used for local operation and which port is used for remote operation If the port is set to Local or Remote the port can be used for all operations and has no priority The communicatio...

Page 90: ...lso be synchronised from Reydisp which utilises the communications support software 6 9 2 TIME SYNCHRONISATION BINARY INPUT A binary input can be mapped Clock Sync from BI The seconds or minutes will be rounded up or down to the nearest vale when the BI is energised This input is leading edge triggered 6 10 Settings Groups The relay provides four groups of settings Group number Gn 1 to 4 At any on...

Page 91: ... de activated by using the password to gain access and by entering the password NONE Again this must be entered twice to de activate the security system As soon as the user attempts to change a setting or initiate control the password is requested before any changes are allowed Once the password has been validated the user is logged on and any further changes can be made without re entering the pa...

Page 92: ...7SR11 7SR12 Description Of Operation Chapter 1 Page 88 of 88 2017 Siemens Protection Devices Limited ...

Page 93: ...ed to be correct no liability shall be accepted for any loss or damage caused by any error or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Settings and Instruments Document Release History This document is issue 2017 02 The list of revisions up to and including...

Page 94: ...7SR11 7SR12 Settings Instruments Guide Chapter 2 Page 2 of 20 2017 Siemens Protection Devices Limited ...

Page 95: ... Connection 16 2 1 1 Front USB connection 16 2 1 2 Rear RS485 connection 16 2 1 3 Optional Rear EN100 Ethernet Module COM3 17 2 1 4 Configuring Relay Serial Data Communication 18 2 1 5 Connecting to the Relay for setting via Reydisp 19 2 1 6 Configuring the user texts using Reydisp Language Editor 20 List of Figures Figure 1 1 1 Menu 4 Figure 1 1 2 Fascia Contrast symbol 4 Figure 2 1 1 USB connect...

Page 96: ...he CB All menus may be viewed without entering a password but actions will not be permitted if the relevant passwords have been set The menus can be viewed via the LCD by pressing the access keys as below Relay Identifier Setting Mode Instruments Fault Data Control Figure 1 1 1 Menu Pressing CANCEL returns to the Identifier screen This document describes the text descriptions as they appear in the...

Page 97: ...R11 7SR12 Settings Instruments Guide 2017 Siemens Protection Devices Limited Chapter 2 Page 5 of 20 Figure 1 1 3 Fascia of a 7SR11 relay E4 Case Figure 1 1 4 Fascia of a 7SR11 relay E6 Case with IEC61850 ...

Page 98: ...o display the relays instrumentation and Fault data and to reset the output relays and LED s The five push buttons have the following functions READ DOWN READ UP Used to navigate the menu structure ENTER The ENTER push button is used to initiate and accept setting changes When a setting is displayed pressing the ENTER key will enter the edit mode the setting will flash and can now be changed using...

Page 99: ...FIG PICK UP CONFIG CB COUNTERS I 2T CB WEAR CONTROL MODE CB TRAVELLING CLOSE I OPEN AR OUT OF SERVICE AR TRIP RECLOSE AR TRIP LOCKOUT SEF IN HOTLINE WORKING OUT INST PROT N IN IN I OUT CONFIRM ACTION CONFIRM ACTION IN I OUT IN I OUT IN I OUT FAVOURITE METERS CURRENT METERS VOLTAGE METERS DIRECTIONAL METERS POWER METERS ENERGY METERS THERMAL METERS AUTORECLOSE METERS MAINTENANCE METERS GENERAL ALAR...

Page 100: ...n the list While a setting is being displayed on the screen the ENTER button can be pressed to edit the setting value If the relay is setting password protected the user will be asked to enter the password If an incorrect password is entered editing will not be permitted All screens can be viewed if the password is not known While a setting is being edited flashing characters indicate the edit fie...

Page 101: ...move From Favourites will appear press ENTER again and this meter will be removed from the FAVOURITE METERS sub group CURRENT METERS to view This is the sub group that includes all the meters that are associated with Current TEST RESET allows access to this sub group Primary Current Ia 0 00A Ib 0 00A Ic 0 00A Displays the 3 phase currents Primary RMS values Secondary Current Ia 0 00A Ib 0 00A Ic 0...

Page 102: ...Voltage Secondary RMS values Angles with respect to PPS voltage Nom Ph N Voltage Va 0 00V o Vb 0 00V o Vc 0 00V o Displays the Phase to Neutral Voltage Nominal RMS values V Seq Components Vzps 0 00V o Vpps 0 00V o Vnps 0 00V o Displays the Voltage Sequence components Nominal RMS values phase angles with respect to PPS voltage Calc Earth Voltage Pri 0 00V Sec 0 00V o Displays the calculated Earth v...

Page 103: ... appropriate values from the selection will be displayed Calc E F Dir 67N No Dir E F Fwd E F Rev The appropriate values from the selection will be displayed Meas E F Dir 67G No Dir E F Fwd E F Rev The appropriate values from the selection will be displayed SEF Dir 67SEF No Dir SEF Fwd SEF Rev The appropriate values from the selection will be displayed THERMAL METERS to view This is the sub group t...

Page 104: ...iew This is the sub group that includes all the meters that are associated with the Binary inputs TEST RESET allows access to this sub group General Alarms ALARM 1 Cleared Displays the state of General Alarm General Alarms ALARM 2 Cleared General Alarms ALARM 3 Cleared General Alarms ALARM 4 Cleared General Alarms ALARM 5 Cleared General Alarms ALARM 6 Cleared DEMAND METERS to view This is the sub...

Page 105: ...ay TEST RESET allows access to this sub group Start Alarm Count 0 Target 100 Count of configurable type of Relay starts Date 01 01 2000 Time 22 41 44 Waveform Recs 0 Fault Recs 0 This meter displays the date and time and the number of Fault records and Event records stored in the relay Event Recs 0 Data Log Recs 0 Setting Group 1 BINARY INPUT METERS to view This is the sub group that includes all ...

Page 106: ... Communications Port 2 EN100 INFORMATION Version EN100 Version Info Part BF1111111111 Displays EN100 information Network Config Mac 00000000 IP 000 000 000 000 NM 255 255 255 000 Displays EN100 network information Gateway 000 000 000 000 EN100 NTP info EN100 Link status info EN100 Rx Tx Count Displays further EN100 61850 information En100 Rx Tx Error En100 Rx Tx 10s CPU Load EN100 Info Meters 1 n ...

Page 107: ...t Data Mode sub menu lists the time and date of the previous ten protection operations The stored data about each fault can be viewed by pressing the TEST RESET button Each record contains data on the operated elements analogue values and LED flag states at the time of the fault The data is viewed by scrolling down using the button ...

Page 108: ... service pack 2 or above and Microsoft NET framework for tools Configuration and download of IEC 61850 data and programming of graphical user logic requires the use of the Reydisp Manager software which is supplied with online instructions and help and is not documented here 2 1 Physical Connection The relay can be connected to Reydisp via any of the communication ports on the relay Suitable commu...

Page 109: ... optic connectors Setting name Range Default Setting Notes LAN Protocol OFF IEC60870 5 103 IEC60870 5 103 If this setting is set to Off access to relay data using Reydisp Evolution and Reydisp Manager software via the Ethernet interface is not available Connections to the optional EN100 ethernet module are made on the rear side of the relay Connections are made to either RJ45 sockets electrical or...

Page 110: ...cation as other relays for example in a fibre optic hub COM1 RS485 Baud Rate Sets the communications baud rate for COM1 RS485 75 110 150 300 600 1200 2400 4800 9600 19200 38400 19200 19200 COM1 RS485 Parity Selects whether parity information is used NONE ODD EVEN EVEN EVEN COM1 RS485 Mode Selects whether the port is Local or Remote Local Remote Local Or Remote Remote Remote COM2 USB Protocol Selec...

Page 111: ...pen up the sub menu File and select Connect The Connection Manager window will display all available communication ports With the preferred port highlighted select the Properties option and ensure the baud rate and parity match that selected in the relay settings Select Connect to initiate the relay PC connection Figure 2 1 4 PC Comm Port Selection The relay settings can now be configured using th...

Page 112: ...o generate your file The file will display all default Original text descriptions in one column and the Alternative text in the other column The descriptions in the Alternative list can be changed and will be used in the relays menu structures Once the file is complete a language file can be created and loaded into the relay using the send file to relay function The communication properties in the...

Page 113: ...ss or damage caused by any error or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Performance Specification Document Release History This document is issue 2017 05 The list of revisions up to and including this issue is 2017 05 Universal PSU added 1 5 1 5 1 5 1 ...

Page 114: ...7SR11 7SR12 Performance Specification 2017 Siemens Protection Devices Limited Chapter 3 Page 2 of 56 ...

Page 115: ...Mechanical 17 Section 2 Protection Functions 18 2 1 27 59 Under over voltage 18 2 1 1 Reference 18 2 1 2 Operate and Reset Level 18 2 1 3 Operate and Reset Time 18 2 2 32 Power 19 2 2 1 Reference 19 2 2 2 Operate and Reset Level 19 2 2 3 Operate and Reset Time 19 2 2 4 Operate Threshold 19 2 3 32S Sensitive Power 20 2 3 1 Reference 20 2 3 2 Operate and Reset Level 20 2 3 3 Operate and Reset Time 2...

Page 116: ...Reset Time 39 2 15 51SEF Time Delayed Sensitive Earth Fault 41 2 15 1 Reference 41 2 15 2 Operate and Reset Level 41 2 15 3 Operate and Reset Time 41 2 16 51V Voltage Controlled Overcurrent 43 2 16 1 Reference 43 2 16 2 Operate and Reset Level 43 2 17 50AFD ARC Flash Detector 44 2 17 1 Reference 44 2 17 2 Operate and Reset Level 44 2 17 3 Operate and Reset Time 44 2 18 55 Power Factor 45 2 18 1 Re...

Page 117: ...pervision 54 3 3 1 Reference 54 3 3 2 Current Voltage Threshold 54 3 3 3 Operate and Reset Time 54 3 4 60VTS Voltage Transformer Supervision 55 3 4 1 Reference 55 3 4 2 Operate and Reset Level 55 3 4 3 Operate and Reset Time 55 3 5 74TCS 74CCS Trip Close Circuit Supervision 56 3 5 1 Reference 56 3 5 2 Operate and Reset Time 56 3 6 81HBL2 Inrush Detector 56 3 6 1 Reference 56 3 6 2 Operate and Rese...

Page 118: ...er the following conditions unless specifically stated otherwise Parameter Value Auxiliary supply nominal Frequency nominal Ambient temperature 20 C 1 1 3 Dimensions Parameter Value E4 case width 103 5 mm E6 case width 155 5 mm Height 177 mm Depth behind panel including clearance for Wiring Fibre Optic Ethernet enclosure Depth below Ethernet variant for cables 241 5 mm 286 5 mm 261 5 mm 75 mm Proj...

Page 119: ...ase 2 7 kg 7SR1102 E4 case 3 2 kg 7SR1103 E4 case 3 2 kg 7SR1107 E4 case 3 2 kg 7SR1204 E4 case 2 7 kg 7SR1205 E4 case 3 2 kg 7SR1206 E4 case 3 2 kg 7SR1208 E4 case 3 2 kg 7SR1102 E6 case 4 15 kg 7SR1103 E6 case 4 15 kg 7SR1107 E6 case 4 15 kg 7SR1205 E6 case 4 15 kg 7SR1206 E6 case 4 15 kg 7SR1208 E6 case 4 15 kg Additional Transport packaging add 0 4kg ...

Page 120: ...ble or implied 1 2 1 1 Burden Battery loading can be estimated from the following maximum figures LV and HV PSU Attribute Watts VA Voltage 24V 30V 48V 110V 220V 115V AC rms 50 60Hz Quiescent Relay inc PROT HEALTHY LED 3 7 3 6 9 Backlight 1 3 3 2 LED Red or Green Each led 0 03 0 05 LED Yellow Each led 0 06 0 1 Binary Output Each output 0 35 0 7 Optional IEC 61850 Comms Interface 2 5 5 5 Battery loa...

Page 121: ...the minimum voltage for a period greater than the 0 Dip With stand Period will invoke a relay reset During conditions of auxiliary input voltage variations which are not described 1 in section 1 4 3 1 the relay may enter a safety protection mode where a power supply shutdown occurs This condition is designed to protect the power supply from damage as well as prevent internal relay faults from deve...

Page 122: ...ase Earth and SEF 1A 5A Continuous 3 0 xIn 10 minutes 3 5 xIn 5 minutes 4 0 xIn 3 minutes 5 0 xIn 2 minutes 6 0 xIn 3 seconds 57 7A 202A 2 seconds 70 7A 247A 1 second 100A 350A 1 cycle 700A 2500A 1 2 3 AC Analogue Voltage Attribute Nominal Operating Range Vn 40 to 160 Vrms 0 to 200 Vrms fn 50 60Hz 47 5 to 52 5Hz and 57 to 63Hz 1 2 3 1 Burden Attribute Value AC Burden 0 02 VA 63 5 V 0 06 VA 110 Vrm...

Page 123: ... operation ENATS48 4 Type maximum threshold Nominal Voltage Minimum threshold Maximum withstand VBI 19 VDC 24 48 60 110 220 V DC 17 VDC 320 VDC 88 VDC 110 220 V DC 74 VDC 320 VDC AC operation Type Operating Range VBI 19 VDC 92 to 138 VRMSAC Nominal 100 110 115 120 V AC Binary inputs are not rated for use on 220 250 V AC 1 2 5 1 DC Performance Attribute Value Maximum DC current for operation VBI 19...

Page 124: ...g should be less than 10 metres in length Binary inputs are not rated for use on 220 250 V AC 1 3 Functional performance 1 3 1 Instrumentation Instrument Value Reference Typical accuracy I Current 0 1 xIn I 3 0 xIn 1 In V Voltage 0 8 xVn V 1 2 xVn 1 Vn W Var VA Power real and apparent V Vn I 0 1 2 xIn pf 0 8 3 Pn where Pn Vn x In pf Power factor V Vn I 0 1 2 xIn pf 0 8 0 05 F Frequency F 47 5 to 5...

Page 125: ...ace IEC 61850 Option Attribute Value Physical layer Fibre optic Connectors Duplex LC 100BaseF in acc With IEEE802 3 Recommended fibre 62 5 125 µm glass fibre with Duplex LC connector Transmission Speed 100 MBits s Optical Wavelength 1300 nm Bridgeable distance 2 km 1 4 4 Electrical Ethernet Data Communication Interface IEC 61850 Option Attribute Value Physical layer Electrical Connectors RJ45 100B...

Page 126: ...5 5 Type Level Between all terminals and earth or between any two independent circuits 5 0 kV 1 2 50 µs 0 5j 1 5 1 4 Insulation IEC 60255 5 Type Level Between any terminal and earth 2 5 kV AC RMS for 1 min Between independent circuits Across normally open contacts 1 0 kV AC RMS for 1 min 1 5 1 5 Installation Category IEC 60255 27 Type Level Installation Category Overvoltage Category Class III 1 5 ...

Page 127: ...1 40 RV 200ms Normal operation 1 except where Dip falls below the relay minimum voltage then Relay Restart 2 70 RV 500ms Normal operation 1 except where Dip falls below the relay minimum voltage then Relay Restart 2 Voltage Dips AC auxiliary supply 0 RV 2 5 3 cycles 50 60Hz claimed Normal Operation 1 40 RV 10 12 cycles 50 60Hz Normal Operation 1 70 RV 25 30 cycles 50 60Hz Normal Operation 1 Voltag...

Page 128: ...uency Disturbance IEC 60255 22 1 Type Level Common longitudinal mode 2 5 kV Series transverse mode 1 0 kV 1 5 3 3 Electrostatic Discharge IEC 60255 22 2 Level Variation With front cover fitted Air discharge Level IV 15kV 5 With front cover removed for access Air discharge Level III 8 kV 5 1 5 3 4 Radiated Immunity IEC 60255 22 3 Type Level 80 MHz to 1000 MHz Sweep 10 V m 1 4GHz to 2 7GHz Sweep 10V...

Page 129: ...EC 6100 4 8 Level 5 100A m 0 126mT continuous 50Hz 1000A m 1 26mT for 3s 1 5 4 Mechanical 1 5 4 1 Vibration Sinusoidal IEC 60255 21 1 Class I Type Level Variation Vibration response 0 5 gn 5 Vibration endurance 1 0 gn 1 5 4 2 Shock and Bump IEC 60255 21 2 Class I Type Level Variation Shock response 5 gn 11 ms 5 Shock withstand 15 gn 11 ms Bump test 10 gn 16 ms 1 5 4 3 Seismic IEC 60255 21 3 Class ...

Page 130: ... 10100 14400 s 2 1 2 Operate and Reset Level Attribute Value Vop Operate level 100 Vs 1 or 0 25V Reset level Overvoltage 100 hyst x Vop 1 or 0 25V Undervoltage 100 hyst x Vop 1 or 0 25V Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 1 3 Operate and Reset Time Attribute Value tbasicE Element basic operate time Overvoltage 0 to 1 1 x Vs 73 ms 10ms 0 to 2 0 xVs 63 ms 10ms Undervoltage 1 1 to 0 5...

Page 131: ...op Operate level 100 Ss 5 or 2 Sn Reset level Over power 95 Sop Under power 105 Sop Variation 10 C to 55 C 5 fnom 3 Hz to fnom 2 Hz 5 2 2 3 Operate and Reset Time Attribute Value tbasic Element basic operate time Over power 1 1 x Ss 60 ms 10 ms 2 0 x Ss 45 ms 10ms Under power 0 5 x Ss 30 ms 10ms top Operate time following delay tbasic td 1 or 10ms Disengaging time 40 ms 2 2 4 Operate Threshold Att...

Page 132: ...alue Sop Operate level 100 Ss 5 or 2 Sn Reset level Over power 95 Sop Under power 105 Sop Variation 10 C to 55 C 5 fnom 3 Hz to fnom 2 Hz 5 2 3 3 Operate and Reset Time Attribute Value tbasicE Element basic operate time Over power 1 1 x Ss 60 ms 10 ms 2 0 x Ss 45 ms 10ms Under power 0 5 x Ss 30 ms 10ms top Operate time following delay tbasic td 1 or 10ms Disengaging time 40 ms 2 3 4 Operate Thresh...

Page 133: ...0 10 100 101 1000 1010 10000 10100 14400 s 2 4 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Reset level 105 Iop Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 4 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 1 1 to 0 5 xIs 35 ms 10ms top Operate time following delay tbasic td 1 or 10ms Repeatability 1 or 10ms Overshoot time 40 ms Dis...

Page 134: ... and Reset Time 46DT Attribute Value tbasic Element basic operate time 0 to 2 xIs 40 ms 10ms 0 to 5 xIs 30 ms 10ms top Operate time following delay tbasic td 1 or 10ms Repeatability 1 or 10ms Overshoot time 40 ms Disengaging time 60 ms 2 5 4 Reference 46IT Parameter Value char Characteristic setting IEC NI VI EI LTI ANSI MI VI EI DTL Tm Time Multiplier setting 0 025 0 030 1 0 Is Setting 0 05 0 06 ...

Page 135: ...α 1 0 char ANSI MI ANSI VI ANSI EI Tm B A t P Is I op 1 5 absolute or 50 ms ANSI EI 5 10 absolute for I Is 10 with TMS 2 for char ANSI MI A 0 0515 B 0 114 P 0 02 ANSI VI A 19 61 B 0 491 P 2 0 ANSI EI A 28 2 B 0 1217 P 2 0 char DTL td 1 or 20ms Reset time ANSI DECAYING Tm R t Is I res 1 2 5 absolute or 50 ms for char ANSI MI R 4 85 ANSI VI R 21 6 ANSI EI R 29 1 IEC DECAYING Tm R t Is I res 1 2 5 ab...

Page 136: ... 00 0 01 20 00 20 10 100 101 1000 1010 10000 10100 14400 s 2 6 2 Operate and Reset Level 47 Attribute Value Vop Operate level 100 Vs 2 or 0 5 V Reset level 100 Hyst x Vop 1 or 0 25V Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 6 3 Operate and Reset Time 47 Attribute Value tbasic Element basic operate time 0V to 2 0 xVs 80 ms 20ms 0V to 10 xVs 55ms 20ms top Operate time following delay tbasi...

Page 137: ... to 10 x Is τ Time constant setting 1 10 100 1000 min 2 7 2 Operate and Reset Level Attribute Value Iol Overload level 100 Is 5 or 1 In Reset level 95 Iol Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 7 3 Operate and Reset Time Attribute Value top Overload trip operate time τ 2 2 2 P 2 I I I ln B I k t where IP prior current 5 absolute or 100ms Is 0 3 3 x In Repeatability 100ms Note Fastest ...

Page 138: ...17 Siemens Protection Devices Limited Chapter 3 Page 26 of 56 0 1 1 10 100 1000 10000 100000 0 1 2 3 4 5 6 7 8 9 10 Current multiple of setting Time sec τ 1000 mins τ 100 mins τ 10 mins τ 1 min Figure 2 7 1 Thermal Overload Protection Curves ...

Page 139: ...1000 1010 10000 10100 14400 s 2 8 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Reset level 95 Iop Repeatability 1 Transient overreach X R 100 5 Variation 10 C to 55 C 5 fnom 5 5 2 8 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 0 to 2 xIs 35 ms 10ms 0 to 5 xIs 25 ms 10ms top Operate time following delay tbasic td 1 or 10ms Repeatability ...

Page 140: ...0 100 101 1000 1010 10000 10100 14400 s 2 9 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Reset level 95 Iop Repeatability 1 Transient overreach X R 100 5 Variation 10 C to 55 C 5 fnom 5 5 2 9 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 0 to 2 xIs 35 ms 10ms 0 to 5 xIs 25 ms 10ms top Operate time following delay tbasic td 1 or 10ms Repe...

Page 141: ... 100 101 1000 1010 10000 10100 14400 s 2 10 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Reset level 95 Iop Repeatability 1 Transient overreach X R 100 5 Variation 10 C to 55 C 5 fnom 5 5 2 10 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 0 to 2 xIs 40 ms 10ms 0 to 5 xIs 30 ms 10ms top Operate time following delay tbasic td 1 or 10ms Rep...

Page 142: ...100 14400 s 2 11 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Reset level 95 Iop or Iop 0 1 In Repeatability 1 Transient overreach X R 100 5 Variation 10 C to 55 C 5 fnom 5 harmonics to fcutoff 5 2 11 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 0 to 2 xIs 35 ms 10ms 0 to 5 xIs 25 ms 10ms top Operate time following delay tbasic td 1 or ...

Page 143: ...op Operate level 105 Is 4 or 1 In Reset level 95 Iop Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 12 3 Operate and Reset Time Attribute Value Starter operate time 2xIs 20 ms 20ms top Operate time char IEC NI IEC VI IEC EI IEC LTI Tm K t Is I op 1 α 5 absolute or 30 ms for char IEC NI K 0 14 α 0 02 IEC VI K 13 5 α 1 0 IEC EI K 80 0 α 2 0 IEC LTI K 120 0 α 1 0 char ANSI MI ANSI VI ANSI EI Tm ...

Page 144: ... Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 50 ms Figure 2 12 1and Figure 2 12 4 show the operate and reset curves for the four IEC IDMTL curves with a time multiplier of 1 Figure 2 12 2 and Figure 2 12 3 show the ANSI operate and reset curves These operate times apply to non directional characteristics Where directional control is applied then the directional element operate ti...

Page 145: ...tection Devices Limited Chapter 3 Page 33 of 56 0 1 1 10 100 1000 1 10 100 Current multiples of setting Time sec 2 3 4 5 6 8 20 30 40 50 60 80 Long Time Inverse Normal Inverse Very Inverse Extremely Inverse Figure 2 12 1 IEC IDMTL Curves Time Multiplier 1 ...

Page 146: ...Protection Devices Limited Chapter 3 Page 34 of 56 0 1 1 10 100 1000 1 10 100 Current multiples of setting Time sec 2 3 4 5 6 8 20 30 40 50 60 80 Moderately Inverse Extremely Inverse Very Inverse Figure 2 12 2 ANSI IDMTL Operate Curves Time Multiplier 1 ...

Page 147: ...s Protection Devices Limited Chapter 3 Page 35 of 56 1 10 100 1000 0 1 1 Current multiples of setting Time sec Moderately Inverse Extremely Inverse Very Inverse 0 2 0 3 0 4 0 5 0 6 0 8 0 9 0 7 5 50 500 Figure 2 12 3 ANSI Reset Curves Time Multiplier 1 ...

Page 148: ...7SR11 7SR12 Performance Specification 2017 Siemens Protection Devices Limited Chapter 3 Page 36 of 56 Figure 2 12 4 IEC Reset Curves Time Multiplier 1 ...

Page 149: ...alue Iop Operate level 105 Is 4 or 1 In Reset level 95 Iop Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 13 3 Operate and Reset Time Attribute Value Starter operate time 2xIs 20 ms 20ms top Operate time char IEC NI IEC VI IEC EI IEC LTI Tm K t Is I op 1 α 5 absolute or 30 ms for char IEC NI K 0 14 α 0 02 IEC VI K 13 5 α 1 0 IEC EI K 80 0 α 2 0 IEC LTI K 120 0 α 1 0 char ANSI MI ANSI VI ANSI ...

Page 150: ... Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 50 ms Figure 2 12 1and Figure 2 12 4 show the operate and reset curves for the four IEC IDMTL curves with a time multiplier of 1 Figure 2 12 2 and Figure 2 12 3 show the ANSI operate and reset curves These operate times apply to non directional characteristics Where directional control is applied then the directional element operate ti...

Page 151: ...ue Iop Operate level 105 Is 4 or 1 In Reset level 95 Iop Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 2 14 3 Operate and Reset Time Attribute Value Starter operate time 2xIs 30 ms 20ms top Operate time char IEC NI IEC VI IEC EI IEC LTI Tm K t Is I op 1 α 5 absolute or 30 ms for char IEC NI K 0 14 α 0 02 IEC VI K 13 5 α 1 0 IEC EI K 80 0 α 2 0 IEC LTI K 120 0 α 1 0 char ANSI MI ANSI VI ANSI EI...

Page 152: ... Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 57 ms Figure 2 12 1and Figure 2 12 4 show the operate and reset curves for the four IEC IDMTL curves with a time multiplier of 1 Figure 2 12 2 and Figure 2 12 3 show the ANSI operate and reset curves These operate times apply to non directional characteristics Where directional control is applied then the directional element operate ti...

Page 153: ... x Is DTL 5 x Is 2 15 2 Operate and Reset Level Attribute Value Iop Operate level 105 Is 4 or 1 In Reset level 95 Iop 4 or 1 In Repeatability 1 Variation 10 C to 55 C 5 fnom 5 harmonics to fcutoff 5 2 15 3 Operate and Reset Time Attribute Value Starter operate time 20 ms 20ms top Operate time char IEC NI IEC VI IEC EI IEC LTI Tm K t Is I op 1 α 5 absolute or 30 ms for char IEC NI K 0 14 α 0 02 IEC...

Page 154: ... R 43 2 IEC EI R 58 2 IEC LTI R 80 tres DECAYING tres 1 or 20ms Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 50 ms Variation fnom 5 harmonics to fcutoff 5 Figure 2 12 1and Figure 2 12 4 show the operate and reset curves for the four IEC IDMTL curves with a time multiplier of 1 Figure 2 12 2 and Figure 2 12 3 show the ANSI operate and reset curves These operate times apply to non d...

Page 155: ...e Vs Setting 60V m multiplier 0 5 Is Setting 1xIn 2 16 2 Operate and Reset Level Attribute Value Vop Operate level 100 Vs 1 or 0 25V Reset level 105 Vop Repeatability 1 Variation 10 C to 55 C 5 fnom 5 harmonics to fcutoff 5 Operate and Reset Time As per Phase Fault Shaped Characteristic Element ANSI 51 Where Pickup Level Is for Voltage Vs Pickup Level Is x m for Voltage Vs ...

Page 156: ...alue 50 AFD Setting 1 2 10 xIn 2 17 2 Operate and Reset Level Attribute Value Iop Operate level no DC transient 100 Is 10 Transient overreach X R 100 30 Reset level 95 Iop Repeatability 5 Variation 10 C to 55 C 5 fnom 3 Hz to fnom 2 Hz 5 2 17 3 Operate and Reset Time Attribute Value tbasic 50AFD Overcurrent operate time 10 ms 16 ms top AFD Zone Operate time Flash 50AFD 15 ms 25 ms Repeatability 10...

Page 157: ... and Reset Level Attribute Value PFop Operate Level PFs 0 05 Reset Level Under PF PFop 0 02 Over PF PFop 0 02 Repeatability 0 05 Variation 10 C to 55 C 0 05 fnom 3 Hz to fnom 2 Hz 0 05 2 18 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 70 ms top Operate time following delay tbasic td 1 or 10ms Disengaging time 80 ms 2 18 4 Operate Threshold Attribute Value Minimum leve...

Page 158: ...operate time 0V to 1 5 xVs 76 ms 20ms 0V to 10 xVs 63 ms 20ms top Operate time following delay tbasic td 1 or 20ms Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 100 ms 2 19 4 Reference 59NIT Parameter Value M Time Multiplier setting 1 Vs Setting 1 1 5 100V 3Vo Applied Current for Operate Time IDMTL 2 x Vs td Delay setting 0 0 01 20 s tres Reset setting 0 1 60 s 2 19 5 Operate and R...

Page 159: ...Devices Limited Chapter 3 Page 47 of 56 Attribute Value top Operate time char IDMTL 1 M t Vs 0 V 3 op 5 or 65 ms char DTL td 1 or 40ms Reset Time char IDMTL tres 5 or 65ms char DTL tres 1 or 40ms Repeatability 1 or 20ms Overshoot time 40 ms Disengaging time 100 ms ...

Page 160: ... 20 00 20 10 100 101 1000 1010 10000 10100 14400 s 2 20 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 xIn Reset level 95 Iop 5 or 0 1 xIn Repeatability 1 Transient overreach X R 100 5 Variation 10 C to 55 C 5 fnom 5 5 2 20 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 0 to 2 xIs 45 ms 10ms 0 to 5 xIs 35 ms 10ms top Operate time following del...

Page 161: ...Angle Attribute Value CA Characteristic angle I with respect to V θ s 5 Operating angle forward CA 85 5 to CA 85 5 reverse CA 180 85 5 to CA 180 85 5 Variation in characteristic angle 10 C to 55 C 5 fnom 5 5 2 21 3 Operate Threshold Attribute Value Minimum levels for operation I p f 5 In I e f 10 In V p f 1 V V e f 1 V 2 21 4 Operate and Reset Time Attribute Value Operate time typically 32 40 ms a...

Page 162: ... 10 20 0 xInxW Where In 1A or 5A I Applied current In 1A 10mA 5A V Applied voltage 10V 200V θ Angle 87 5deg CA 67SEF Char Angle θc 0 f Nominal 50 60Hz 2 22 2 Operate and Reset Level Attribute Value Pop Operate level 100 Po 25 or 25mW Reset level 95 Pop Variation 10 C to 55 C 5 2 22 3 Operate and Reset Time Attribute Value tbasic Element basic operate time 50ms Repeatability 1 or 10ms ...

Page 163: ...e level 100 Fs 10mHz Reset level overfrequency 100 hyst xFop 10mHz underfrequency 100 hyst xFop 10mHz Repeatability 1 Variation 10 C to 55 C 5 2 23 3 Operate and Reset Time Attribute Value tbasic Element basic operate time for ROCOF between 1 and 5 0 Hz sec overfrequency Typically 110ms Maximum 150ms underfrequency Typically 110ms Maximum 150ms Element basic operate time for ROCOF between 0 1 and ...

Page 164: ... tf Delay setting 0 03 04 20 0 20 1 100 101 1000 1010 14400 s 3 1 2 Operate and Reset Level Attribute Value Icurr Operate level 100 Iset 5 Reset level 90 Icurr 5 Repeatability 1 Variation 10 C to 55 C 5 fnom 5 harmonics to fcutoff 5 3 1 3 Operate and Reset Time Attribute Value tbasic Basic operate time 1x In to 0 A 40 ms Operate time tf tbasic 1 or 20ms Repeatability 1 or 20ms Variation fnom 5 har...

Page 165: ... 0 xIn tCBF1 Stage 1 Delay setting 20 25 60000ms tCBF2 Stage 2 Delay setting 20 25 60000ms 3 2 2 Operate and Reset Level Attribute Value Iop Operate level 100 Is 5 or 1 In Ireset Reset level 100 Iop 5 or 1 In Repeatability 1 Variation 10 C to 55 C 5 fnom 5 5 3 2 3 Operate and Reset Time Attribute Value top Stage 1 tCBF1 1 or 20ms Stage 2 tCBF2 1 or 20ms Repeatability 1 or 20ms Overshoot 2 x 20ms D...

Page 166: ...50 100 101 1000 1010 10000 10100 14400 s Directional Relays have additional VT settings Vthresh Voltage Threshold 7 8 110V 3 3 2 Current Voltage Threshold Attribute Value Iop CT failed current level 100 Ithresh 5 or 1 In Reset level 90 Iop 5 or 1 In Vop CT failed voltage level 100 Vthresh 2 or 0 5V Reset level 110 Vop 2 or 0 5V Repeatability 1 Variation 10 C to 55 C 5 fnom 5 harmonics to fcutoff 5...

Page 167: ...alue VNPSop Voltage NPS operate level 100 Vnps 5 Vn Voltage NPS reset level 90 VNPSop 5 Vn VPPSop Voltage PPS operate level 100 Vpps 5 Vn Voltage PPS reset level 110 VPPSop 5 Vn INPSblk Current NPS operate level 100 Inps 5 xIn Current NPS reset level 90 INPSblk 5 xIn IPPSblk Current PPS operate level 100 IFpps 5 xIn Current PPS reset level 90 IPPSblk 5 xIn IPPSload Current PPS operate level 100 Ip...

Page 168: ...op Operate time following delay tbasic td 1 or 10ms Repeatability 1 or 10ms Variation 10 C to 55 C 5 fnom 5 5 3 6 81HBL2 Inrush Detector 3 6 1 Reference Parameter Value I Setting Ratio of 2nd Harmonic current to Fundamental component current 0 10 0 11 0 5 3 6 2 Operate and Reset Time Attribute Value tbasic Element basic operate time Will pick up before operation of any protection element due to ma...

Page 169: ...odel or article be reproduced from this document unless Siemens Protection Devices Limited consent While the information and guidance given in this document is believed to be correct no liability shall be accepted for any loss or damage caused by any error or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2017 Siemens...

Page 170: ...7SR120 Technical Manual Chapter 4 Page 2 of 84 2017 Siemens Protection Devices Limited ...

Page 171: ...Register Data Types 30 4 2 1 FLOAT_IEEE_754 30 4 2 2 FP_32BITS_3DP 31 4 2 3 UINT32 31 4 2 4 UINT16 31 4 2 5 EVENT 32 4 2 6 EVENTCOUNT 33 4 2 7 TIME_METER 33 4 2 8 STR32 STR64 33 4 2 9 BITSTRING 33 4 3 Point List 35 4 3 1 Coils Read Write Binary values 35 4 3 2 Inputs Read Only Binary values 36 4 3 3 Input Registers Read Only Registers 40 4 3 4 Holding Registers Read Write Registers 43 5 DNP3 Defin...

Page 172: ...onnecting a Modem to the Relay s 77 8 3 Setting the Remote Modem 77 8 4 Connecting to the Remote Modem 77 9 Configuration 79 10 Glossary 81 Appendix 1 83 List of Figures Fig 2 1 Communication to Front USB Port 8 Fig 2 2 Communication to Multiple Devices using RS485 Standard Port 10 Fig A1 Operating Mode Table 83 ...

Page 173: ...tions protocols DNP3 IEC 60870 5 103 IEC 61850 and MODBUS RTU Note not all protocols are available on all devices Reydisp Evolution or Reydisp Manager Software is available for computers running Microsoft Windows to connect to devices to provide operational information post fault analysis setting interrogation and editing facilities etc Configuration software can be downloaded from our website htt...

Page 174: ...7SR120 Technical Manual Chapter 4 Page 6 of 84 2017 Siemens Protection Devices Limited ...

Page 175: ...rotocol is also available through this port the main use of this protocol is to allow the Relay firmware to be updated via the front connection MODBUS RTU or the optional DNP3 protocols are also available COM3 LAN When the Ethernet module is fitted in addition to IEC61850 a LAN connection is provided to allow the Reydisp software to connect to the Relay via the network This port only supports the ...

Page 176: ...out the need to first change any settings Access to the communication settings for the USB port is only available from the relay front fascia via the key pad setting menu COMMUNICATIONS MENU Setting Name Range Options Default Setting Notes COM2 USB Protocol OFF IEC60870 5 103 MODBUS RTU ASCII DNP3 IEC60870 5 103 Reydisp software requires IEC60870 5 103 COM2 USB Station Address 0 254 for IEC60870 5...

Page 177: ...nnected in reverse communication to all devices will be disturbed but no damage will occur If problems are experienced during commissioning the connections should be tried in reverse The maximum number of relays that can be connected to the bus is 64 The RS485 data comms link will be broken for that particular relay element if it is withdrawn from the case but the chain of communication to the oth...

Page 178: ... RS485 Screened twisted pair Rear terminals Ext Wire loop terminating resistance added where permanent drive from master station available A RS485 GND B Term 14 16 18 20 A RS485 GND B Term 14 16 18 20 A RS485 GND B Term 14 16 18 20 RS 485 Twisted pair Cable To Control System Bus Termination Polarity 5V B A GND Fig 2 2 Communication to Multiple Devices using RS485 Standard Port ...

Page 179: ...ating as a slave responding to the master s commands The implementation provides event information time synchronising commands and measurands and also supports the transfer of disturbance records This protocol can be set to use any or all of the relays hardware interfaces USB Fibre Optic RS232 RS485 and Ethernet where fitted and is the standard protocol used by the USB port The relay can communica...

Page 180: ...ction table lists possible causes of transmission for these frames The following abbreviations are used Abbreviation Description SE spontaneous event T test mode GI general interrogation Loc local operation Rem remote operation Ack command acknowledge Nak Negative command acknowledge Note Events listing a GI cause of transmission can be raised and cleared other events are raised only ...

Page 181: ...DU column of the Information Number and Function table lists the possible ASDUs returned for a point ASDU Description 1 Time tagged message monitor direction 2 Time tagged message relative time monitor direction 3 1 Measurands I 4 Time tagged measurands with relative time 5 Identification message 6 Time synchronisation 7 General Interrogation Initialization 9 Measurands II 20 General command ...

Page 182: ...E GI 60 5 Out Of Service Mode 20 Ack Nak 1 SE GI 60 6 Local Mode 20 Ack Nak 1 SE GI 60 7 Local Remote 20 Ack Nak 60 12 Control Received 1 SE 60 13 Command Received 1 SE 60 128 Cold Start 1 SE 60 129 Warm Start 1 SE 60 130 Re Start 1 SE 60 131 Expected Restart 1 SE GI 60 132 Unexpected Restart 1 SE GI 1 SE 60 133 Reset Start Count 20 Ack Nak 60 135 Trigger Storage 1 SE 60 136 Clear Waveform Records...

Page 183: ...20 Ack Nak 1 SE GI 80 5 Binary Output 5 20 Ack Nak 1 SE GI 80 6 Binary Output 6 20 Ack Nak 1 SE GI 80 7 Binary Output 7 20 Ack Nak 1 SE GI 80 8 Binary Output 8 20 Ack Nak 90 1 LED 1 1 SE GI 90 2 LED 2 1 SE GI 90 3 LED 3 1 SE GI 90 4 LED 4 1 SE GI 90 5 LED 5 1 SE GI 90 6 LED 6 1 SE GI 90 7 LED 7 1 SE GI 90 8 LED 8 1 SE GI 90 9 LED 9 1 SE GI 91 1 LED PU 1 1 SE GI 91 2 LED PU 2 1 SE GI 91 3 LED PU 3 ...

Page 184: ...h Fault Reverse Busbar 2 SE GI 160 64 Start Pick up L1 2 SE GI 160 65 Start Pick up L2 2 SE GI 160 66 Start Pick up L3 2 SE GI 160 67 Start Pick up N 2 SE GI 160 68 General Trip 2 SE 160 69 Trip L1 2 SE 160 70 Trip L2 2 SE 160 71 Trip L3 2 SE 160 74 Fault Forward Line 2 SE GI 160 75 Fault Reverse Busbar 2 SE GI 160 84 General Start Pick up 2 SE GI 160 85 Breaker Failure 2 SE 160 90 Trip I 2 SE 160...

Page 185: ... 20 Ack Nak 183 56 50BF Stage 1 2 SE GI 183 60 47 1 2 SE GI 183 61 47 2 2 SE GI 183 62 37 1 2 SE GI 183 63 37 2 2 SE GI 183 64 37G 1 2 SE GI 183 65 37G 2 2 SE GI 183 70 46BC 2 SE GI 183 81 27 59 1 2 SE GI 183 82 27 59 2 2 SE GI 183 83 27 59 3 2 SE GI 183 84 27 59 4 2 SE GI 183 85 59NIT 2 SE GI 183 86 59NDT 2 SE GI 183 90 81 1 2 SE GI 183 91 81 2 2 SE GI 183 92 81 3 2 SE GI 183 93 81 4 2 SE GI 183 ...

Page 186: ...183 140 Cold Load Active 1 SE GI 183 141 P F Inst Protection Inhibited 1 SE GI 183 142 E F Inst Protection Inhibited 1 SE GI 183 144 Ext Inst Protection Inhibited 1 SE GI 183 163 Trip Time Alarm 1 SE 183 164 Close Circuit Fail 1 2 SE GI 183 165 Close Circuit Fail 2 2 SE GI 183 166 Close Circuit Fail 3 2 SE GI 183 167 Close Circuit Fail 2 SE GI 183 171 60 CTS I 2 SE GI 183 172 Act Energy Exp 4 SE 1...

Page 187: ...GI 183 252 Trip PhA 2 SE GI 183 253 Trip PhB 2 SE GI 183 254 Trip PhC 2 SE GI 185 37 27 59 PhA 2 SE GI 185 38 27 59 PhB 2 SE GI 185 39 27 59 PhC 2 SE GI 185 43 General Trip 2 SE GI 185 44 32 1 1 SE GI 185 45 32 2 1 SE GI 185 48 55 1 1 SE GI 185 49 55 2 1 SE GI 185 110 CB Wear CB A 4 SE 185 111 CB Wear CB B 4 SE 185 112 CB Wear CB C 4 SE 185 113 CB Wear CB A Remaining 4 SE 185 114 CB Wear CB B Rema...

Page 188: ... SP Command 2 20 Ack Nak 1 SE GI 200 152 User SP Command 3 20 Ack Nak 1 SE GI 200 153 User SP Command 4 20 Ack Nak 1 SE GI 200 154 User SP Command 5 20 Ack Nak 1 SE GI 200 155 User SP Command 6 20 Ack Nak 1 SE GI 200 156 User SP Command 7 20 Ack Nak 1 SE GI 200 157 User SP Command 8 20 Ack Nak 1 SE 200 158 User DP Command 1 20 Ack Nak 1 SE 200 159 User DP Command 2 20 Ack Nak 1 SE 200 160 User DP ...

Page 189: ... SE 60 170 General Alarm 1 0 SE GI 60 171 General Alarm 2 0 SE GI 60 172 General Alarm 3 0 SE GI 60 173 General Alarm 4 0 SE GI 60 174 General Alarm 5 0 SE GI 60 175 General Alarm 6 0 SE GI 60 182 Quick Logic E1 0 SE GI 60 183 Quick Logic E2 0 SE GI 60 184 Quick Logic E3 0 SE GI 60 185 Quick Logic E4 0 SE GI 70 5 Binary Input 5 0 SE GI 70 6 Binary Input 6 0 SE GI 75 1 Virtual Input 1 0 SE GI 75 2 ...

Page 190: ...ngs changed 0 SE 160 23 Setting G1 selected 0 SE GI 160 24 Setting G2 selected 0 SE GI 160 25 Setting G3 selected 0 SE GI 160 26 Setting G4 selected 0 SE GI 160 27 Binary Input 1 0 SE GI 160 28 Binary Input 2 0 SE GI 160 29 Binary Input 3 0 SE GI 160 30 Binary Input 4 0 SE GI 160 36 Trip Circuit Fail 0 SE GI 160 38 VT Fuse Failure 0 SE GI 160 51 Earth Fault Forward Line 0 SE GI 160 52 Earth Fault ...

Page 191: ...I 183 30 51N 4 0 SE GI 183 31 50N 4 0 SE GI 183 34 50BF Stage 2 0 SE GI 183 35 49 Alarm 0 SE GI 183 36 49 Trip 0 SE GI 183 40 60 CTS 0 SE GI 183 41 51SEF 1 2 SE GI 183 42 50SEF 1 2 SE GI 183 43 51SEF 2 2 SE GI 183 44 50SEF 2 2 SE GI 183 45 51SEF 3 2 SE GI 183 46 50SEF 3 2 SE GI 183 47 51SEF 4 2 SE GI 183 48 50SEF 4 2 SE GI 2 SE GI 183 49 SEF Out 20 Ack Nak 183 50 46IT 0 SE GI 183 51 46DT 0 SE GI 1...

Page 192: ...SE GI 183 124 CB Delta Trip Count 0 SE GI 183 125 CB Count To AR Block 0 SE GI 183 126 Reset CB Total Trip Count 0 SE 183 127 Reset CB Delta Trip Count 0 SE 183 128 Reset CB Count To AR Block 0 SE 183 129 I 2t CB Wear 0 SE GI 183 130 Reset I 2t CB Wear 0 SE 183 131 79 AR In progress 0 SE GI 183 132 CB Frequent Ops Count 0 SE GI 183 133 Reset CB Frequent Ops Count 0 SE 183 137 CB on by auto reclose...

Page 193: ...EF 0 SE GI 183 235 79 Last Trip Lockout 0 SE GI 183 237 CB DBI 0 SE GI 183 238 CB Travelling 0 SE GI 183 239 In Fault Current 0 SE 183 240 Ia Fault Current 0 SE 183 241 Ib Fault Current 0 SE 183 242 Ic Fault Current 0 SE 183 244 Isef Fault Current 4 SE 183 245 Va Fault Voltage 0 SE 183 246 Vb Fault Voltage 0 SE 183 247 Vc Fault Voltage 0 SE 183 249 60 CTS I PhA 0 SE GI 183 250 60 CTS I PhB 0 SE GI...

Page 194: ...nt 0 SE 186 19 AFD Zone3 Count 0 SE 186 20 AFD Zone4 Count 0 SE 186 21 AFD Zone5 Count 0 SE 186 22 AFD Zone6 Count 0 SE 200 1 CB 1 0 SE 200 6 CB 1 Opened 0 SE GI 200 7 CB 1 Closed 0 SE GI 200 150 User SP Command 1 0 SE GI 200 151 User SP Command 2 0 SE GI 200 152 User SP Command 3 0 SE GI 200 153 User SP Command 4 0 SE GI 200 154 User SP Command 5 0 SE GI 200 155 User SP Command 6 0 SE GI 200 156 ...

Page 195: ...0 1 VL1 2 1 2x Window 1 VL2 3 1 2x Window 1 VL3 1 1 2x Window 1 9 Cyclic Refresh rate 5 seconds or value change greater than Window x 183 236 Measurand Max Ia b c Van bn cn P Q Vab bc ca Ia Max 2 4x Window 1 Ib Max 2 4x Window 1 Ic Max 2 4x Window 1 Van Max1 1 2x Window 1 Vbn Max2 1 2x Window 1 Vcn Max3 1 2x Window 1 P Max 2 4x Window 1 Q Max 2 4x Window 1 Vab Max 1 2x Window 1 Vbc Max 1 2x Window...

Page 196: ...7SR120 Technical Manual Chapter 4 Page 28 of 84 2017 Siemens Protection Devices Limited ...

Page 197: ...SB Fibre Optic RS232 and RS485 where fitted The relay can communicate simultaneously on all ports regardless of protocol used The Station Address of the port being used must be set to a suitable address within the range 1 247 to enable communication This can be set by the Communications Menu COM n xxxxx Station Address setting Communication via MODBUS over Ethernet requires external devices Please...

Page 198: ...stance xyz The mantissa represents the binary fraction of a number therefore the MSB represents 2 1 or 1 2 1 and its LSB 2 23 or 1 2 23 The following table shows a detailed layout of the mantissa 1 2 1 1 2 2 1 2 3 1 2 4 1 2 21 1 2 22 1 2 23 0 5 0 25 0 125 0 0625 4 768e 7 2 384e 7 1 192e 7 As an example 1 000 000 would be represented as follows hex 49742400 4 9 7 4 2 4 0 0 0 1 0 0 1 0 0 1 0 1 1 1 0...

Page 199: ...eception these two registers should be interpreted in the correct order as a 32 bit integer 4 2 3 UINT32 The UINT32 is a signed 32 bit integer As it is an integer negative numbers are sent as 2 s complement UINT32 MODBUS In this MODBUS implementation the 32 bit value is stored in 2 16 bit registers in Big Endian format As an example if we take the hex representation of 123456 in 2 s complement we ...

Page 200: ...an be checked periodically to determine how many events are stored The format of the event record is defined by the zero byte It signifies the type of record which is used to decode the event information The zero byte can be one of the following Format The format of the event record is defined by the zero byte It signifies the type of record which is used to decode the event information The zero b...

Page 201: ...s as follows The following table describes the fields in the time Key Description ms L Time Stamp Milliseconds low byte ms H Time Stamp Milliseconds high byte Mi Time Stamp Minutes MSB invalid time not set 23 hours Ho Time Stamp Hours MSB Summer time flag Da Time Stamp Days Mo Time Stamp Months Ye L Time Stamp Years low byte Ye H Time Stamp Years high byte Not Used The following table shows the fi...

Page 202: ...n a 16 bit register in Big Endian format As an example assume bits 1 3 9 and 12 are set The binary representation of this would be 00001001000001012 giving a hex representation of 0905h Assume this is stored in the register 30001 it would look as follows Address Value 30001 0905 On reception this register should be interpreted as a 16 bit integer ...

Page 203: ...8 00101 Setting G1 selected 00102 Setting G2 selected 00103 Setting G3 selected 00104 Setting G4 selected 00109 CB 1 00112 Auto reclose active 00113 HotLine Working 00114 E F Out 00115 SEF Out 00116 Inst Protection Out 00155 Remote Mode 00156 Out Of Service Mode 00157 Local Mode 00158 Local Remote 00165 Reset Start Count 00180 CB 1 Opened 00181 CB 1 Closed 00200 User SP Command 1 00201 User SP Com...

Page 204: ...al Mode 10105 Local Remote 10110 General Trip 10111 Trip Circuit Fail 10112 Start Pick up L1 10113 Start Pick up L2 10114 Start Pick up L3 10115 General Start Pick up 10116 VT Fuse Failure 10117 Earth Fault Forward Line 10118 Earth Fault Reverse Busbar 10119 Start Pick up N 10120 Fault Forward Line 10121 Fault Reverse Busbar 10122 51 1 10123 50 1 10124 51N 1 10125 50N 1 10126 51G 1 10127 50G 1 101...

Page 205: ...162 81 2 10163 81 3 10164 81 4 10167 64H 10168 37 1 10169 37 2 10171 Auto reclose active 10172 CB on by auto reclose 10173 Reclaim 10174 Lockout 10175 HotLine Working 10176 Inst Protection Out 10177 CB Total Trip Count 10178 CB Delta Trip Count 10179 CB Count To AR Block 10180 I 2t CB Wear 10181 79 AR In progress 10182 Cold Load Active 10183 E F Out 10184 P F Inst Protection Inhibited 10185 E F In...

Page 206: ...rcuit Fail 2 10285 Close Circuit Fail 3 10286 Close Circuit Fail 10288 SEF Forward Line 10289 SEF Reverse Busbar 10290 General Alarm 1 10291 General Alarm 2 10292 General Alarm 3 10293 General Alarm 4 10294 General Alarm 5 10295 General Alarm 6 10302 Quick Logic E1 10303 Quick Logic E2 10304 Quick Logic E3 10305 Quick Logic E4 10334 60 CTS I 10335 81HBL2 10336 37G 1 10337 37G 2 10338 37SEF 1 10339...

Page 207: ...02 LED 2 10603 LED 3 10604 LED 4 10605 LED 5 10606 LED 6 10607 LED 7 10608 LED 8 10609 LED 9 10701 LED PU 1 10702 LED PU 2 10703 LED PU 3 10704 LED PU 4 10705 LED PU 5 10706 LED PU 6 10707 LED PU 7 10708 LED PU 8 10709 LED PU 9 10800 Cold Start 10801 Warm Start 10802 Re Start 10803 Power On 10804 Expected Restart 10805 Unexpected Restart 10806 Reset Start Count 10900 User SP Command 1 10901 User S...

Page 208: ...e 2 11086 AFD Zone 3 Flash 11087 AFD Zone 3 11088 AFD Zone 4 Flash 11089 AFD Zone 4 11090 AFD Zone 5 Flash 11091 AFD Zone 5 11092 AFD Zone 6 Flash 11093 AFD Zone 6 4 3 3 Input Registers Read Only Registers Address Description Format Mult Description 30001 Event Count EVENTCOUNT 0 000000 Events Counter 30002 Event EVENT 0 000000 8 Registers 30010 Vab Primary FP_32BITS_3DP 1 000000 Vab V 30012 Vbc P...

Page 209: ...32BITS_3DP 1 000000 Ic xIn 30082 Ia Nominal FP_32BITS_3DP 1 000000 Ia Degrees 30084 Ib Nominal FP_32BITS_3DP 1 000000 Ib Degrees 30086 Ic Nominal FP_32BITS_3DP 1 000000 Ic Degrees 30088 In Primary FP_32BITS_3DP 1 000000 In A 30090 In Secondary FP_32BITS_3DP 1 000000 In A 30092 In Nominal FP_32BITS_3DP 1 000000 In xInom 30094 Ig Primary FP_32BITS_3DP 1 000000 Ig A 30096 Ig Secondary FP_32BITS_3DP 1...

Page 210: ...nd 30195 I Phase B Max FP_32BITS_3DP 1 000000 Ib Max Demand 30197 I Phase C Max FP_32BITS_3DP 1 000000 Ic Max Demand 30199 P 3P Max FP_32BITS_3DP 0 000001 Power Max Demand 30201 Q 3P Max FP_32BITS_3DP 0 000001 VARs Max Demand 30207 Isef Primary FP_32BITS_3DP 1 000000 Isef A 30209 Isef Secondary FP_32BITS_3DP 1 000000 Isef A 30211 Isef Nominal FP_32BITS_3DP 1 000000 Isef xInom 30241 CB Total Trip C...

Page 211: ...000 Start Count Target 30390 Freq Last Trip FP_32BITS_3DP 1 000000 Freq Last Trip 30392 Active Setting Group UINT16 1 000000 Active Setting Group 30400 Frequency Max FP_32BITS_3DP 1 000000 Frequency Max 30402 S 3P Max FP_32BITS_3DP 0 000010 S 3P Max 30468 CB Trip Time Meter FP_32BITS_3DP 1 000000 CB Trip Time 4 3 4 Holding Registers Read Write Registers Address Description Format Mult Description ...

Page 212: ...0000 Ipps xIn 40104 Inps Nominal FP_32BITS_3DP 1 000000 Inps xIn 40106 Izps Nominal FP_32BITS_3DP 1 000000 Izps Degrees 40108 Ipps Nominal FP_32BITS_3DP 1 000000 Ipps Degrees 40110 Inps Nominal FP_32BITS_3DP 1 000000 Inps Degrees 40112 Active Power A FP_32BITS_3DP 0 000001 A Phase W 40114 Active Power B FP_32BITS_3DP 0 000001 B Phase W 40116 Active Power C FP_32BITS_3DP 0 000001 C Phase W 40118 P ...

Page 213: ... 1 000000 CB Count to AR Block 40247 CB Frequent Ops Count UINT32 1 000000 CB Frequent Ops Count 40301 Ia Last Trip FP_32BITS_3DP 1 000000 Ia Fault 40303 Ib Last Trip FP_32BITS_3DP 1 000000 Ib Fault 40305 Ic Last Trip FP_32BITS_3DP 1 000000 Ic Fault 40307 Va Last Trip FP_32BITS_3DP 1 000000 Va Fault 40309 Vb Last Trip FP_32BITS_3DP 1 000000 Vb Fault 40311 Vc Last Trip FP_32BITS_3DP 1 000000 Vc Fau...

Page 214: ...mum 40368 Active Setting Group UINT16 1 000000 Active Setting Group 40394 Ia 2nd Harmonic Nominal FP_32BITS_3DP 1 000000 81HBL2 PhA xIn 40396 Ib 2nd Harmonic Nominal FP_32BITS_3DP 1 000000 81HBL2 PhB xIn 40398 Ic 2nd Harmonic Nominal FP_32BITS_3DP 1 000000 81HBL2 PhC xIn 40401 Event Count EVENTCOUNT 0 000000 Events Counter 40402 Event EVENT 0 000000 8 Registers 40404 Frequency Max FP_32BITS_3DP 1 ...

Page 215: ...d the complete list is described in the attached table For static non change event object requests request qualifier codes 07 and 08 limited quantity and 17 and 28 index are supported Static object requests sent with qualifiers 07 or 08 will be responded with qualifiers 00 or 01 Output Event Object 11 is supported Maximum Data Link Frame Size octets Transmitted 256 Received 256 Maximum Application...

Page 216: ...e On Never Always Sometimes Configurable Pulse Off Never Always Sometimes Configurable Latch On Never Always Sometimes Configurable Latch Off Never Always Sometimes Configurable Queue Never Always Sometimes Configurable Clear Queue Never Always Sometimes Configurable Attach explanation if Sometimes or Configurable was checked for any operation Reports Binary Input Change Events when no specific va...

Page 217: ...E DOCUMENT Also see the DNP 3 0 Implementation Table in Section 5 2 beginning on page 50 File Transfer Support Yes No Append File Mode Yes No Custom Status Code Strings Yes No Permissions Field Yes No File Events Assigned to Class Yes No File Events Send Immediately Yes No Multiple Blocks in a Fragment Yes No Max Number of Files Open 0 ...

Page 218: ...9 response 00 01 start stop 17 28 index see note 2 2 0 Binary Input Change Any Variation 1 read 06 no range or all 07 08 limited qty 2 1 Binary Input Change without Time 1 read 06 no range or all 07 08 limited qty 129 response 130 unsol resp 17 28 index 2 2 default see note 1 Binary Input Change with Time 1 read 06 no range or all 07 08 limited qty 129 response 130 unsol resp 17 28 index 2 3 Binar...

Page 219: ... 12 2 Pattern Control Block 3 select 4 operate 5 direct op 6 dir op noack 7 limited quantity 129 response echo of request 12 3 Pattern Mask 3 select 4 operate 5 direct op 6 dir op noack 00 01 start stop 129 response echo of request 13 0 Binary Output Command Event Any Variation 1 read 06 no range or all 07 08 limited qty 13 1 default see note 1 Binary Output Command Event without Time 1 read 06 no...

Page 220: ... 6 16 Bit Frozen Counter without Time Of Freeze 1 read 00 01 start stop 06 no range or all 07 08 limited qty 17 27 28 index 129 response 00 01 start stop 17 28 index see note 2 21 7 32 Bit Frozen Delta Counter with Time Of Freeze 21 8 16 Bit Frozen Delta Counter with Time Of Freeze 21 9 default see note 1 32 Bit Frozen Counter without Flag 1 read 00 01 start stop 06 no range or all 07 08 limited q...

Page 221: ...nalog Input Any Variation 1 read 22 assign class 00 01 start stop 06 no range or all 07 08 limited qty 17 27 28 index 30 1 32 Bit Analog Input 1 read 00 01 start stop 06 no range or all 07 08 limited qty 17 27 28 index 129 response 00 01 start stop 17 28 index see note 2 30 2 default see note 1 16 Bit Analog Input 1 read 00 01 start stop 06 no range or all 07 08 limited qty 17 27 28 index 129 resp...

Page 222: ...point Analog Change Event with Time 1 read 06 no range or all 07 08 limited qty 129 response 130 unsol resp 17 28 index 32 8 long floating point Analog Change Event with Time 1 read 06 no range or all 07 08 limited qty 129 response 130 unsol resp 17 28 index 33 0 Frozen Analog Event Any Variation 33 1 32 Bit Frozen Analog Event without Time 33 2 16 Bit Frozen Analog Event without Time 33 3 32 Bit ...

Page 223: ...e or all 1 read 06 no range or all 07 08 limited qty 60 3 Class 2 Data 20 enbl unsol 21 dab unsol 22 assign class 06 no range or all 1 read 06 no range or all 07 08 limited qty 60 4 Class 3 Data 20 enbl unsol 21 dab unsol 22 assign class 06 no range or all 1 read 00 01 start stop 129 response 00 01 start stop 80 1 Internal Indications 2 write see note 3 00 start stop index 7 No Object function cod...

Page 224: ...nt buffer size is set to allow 100 events Binary inputs are by default returned in a class zero interrogation Note not all points listed here apply to all builds of devices Binary Input Points Static Steady State Object Number 1 Packed Format Change Event Object Number 1 w o Time Static Variation reported when variation 0 requested 1 Binary Input w o status or 2 Binary Input with status Change Eve...

Page 225: ... Static Object 1 Default Variation Event Object 2 50 Fault Forward Line 0 2 2 2 51 Fault Reverse Busbar 0 2 2 2 52 51 1 0 2 2 2 53 50 1 0 2 2 2 54 51N 1 0 2 2 2 55 50N 1 0 2 2 2 56 51G 1 0 2 2 2 57 50G 1 0 2 2 2 58 51 2 0 2 2 2 59 50 2 0 2 2 2 60 51N 2 0 2 2 2 61 50N 2 0 2 2 2 62 51G 2 0 2 2 2 63 50G 2 0 2 2 2 64 60 CTS 0 2 2 2 65 46IT 0 2 2 2 66 46DT 0 2 2 2 67 47 1 0 2 2 2 68 47 2 0 2 2 2 69 46B...

Page 226: ... 2 100 P F Inst Protection Inhibited 0 2 2 2 101 E F Inst Protection Inhibited 0 2 2 2 102 SEF Inst Protection Inhibited 0 2 2 2 103 Ext Inst Protection Inhibited 0 2 2 2 117 51SEF 1 0 2 2 2 118 50SEF 1 0 2 2 2 119 51SEF 2 0 2 2 2 120 50SEF 2 0 2 2 2 121 51SEF 3 0 2 2 2 122 50SEF 3 0 2 2 2 123 51SEF 4 0 2 2 2 124 50SEF 4 0 2 2 2 125 SEF Out 0 2 2 2 126 Trip Circuit Fail 1 0 2 2 2 127 Trip Circuit ...

Page 227: ...Alarm 2 0 2 2 2 227 General Alarm 3 0 2 2 2 228 General Alarm 4 0 2 2 2 229 General Alarm 5 0 2 2 2 230 General Alarm 6 0 2 2 2 237 Quick Logic E1 0 2 2 2 238 Quick Logic E2 0 2 2 2 239 Quick Logic E3 0 2 2 2 240 Quick Logic E4 0 2 2 2 269 60 CTS I 0 2 2 2 270 81HBL2 0 2 2 2 271 37G 1 0 2 2 2 272 37G 2 0 2 2 2 273 Wattmetric Po 0 2 2 2 274 37 PhA 0 2 2 2 275 37 PhB 0 2 2 2 276 37 PhC 0 2 2 2 283 5...

Page 228: ... 79 AR In progress 0 2 2 2 422 HotLine Working 0 2 2 2 425 Inst Protection Out 0 2 2 2 427 CB 1 0 2 2 2 501 Virtual Input 1 0 2 2 2 502 Virtual Input 2 0 2 2 2 503 Virtual Input 3 0 2 2 2 504 Virtual Input 4 0 2 2 2 505 Virtual Input 5 0 2 2 2 506 Virtual Input 6 0 2 2 2 507 Virtual Input 7 0 2 2 2 508 Virtual Input 8 0 2 2 2 601 LED 1 0 2 2 2 602 LED 2 0 2 2 2 603 LED 3 0 2 2 2 604 LED 4 0 2 2 2 ...

Page 229: ...t 0 2 2 2 876 Unexpected Restart 0 2 2 2 877 Reset Start Count 0 2 2 2 890 CB 1 Opened 0 2 2 2 891 CB 1 Closed 0 2 2 2 900 User SP Command 1 0 2 2 2 901 User SP Command 2 0 2 2 2 902 User SP Command 3 0 2 2 2 903 User SP Command 4 0 2 2 2 904 User SP Command 5 0 2 2 2 905 User SP Command 6 0 2 2 2 906 User SP Command 7 0 2 2 2 907 User SP Command 8 0 2 2 2 1063 CB DBI 0 2 2 2 1064 CB Travelling 0 ...

Page 230: ...Status Points Object 10 and the Control Relay Output Blocks Object 12 While Binary Output Status Points are included here for completeness they are not often polled by DNP 3 0 Masters Binary Output Status points are not recommended to be included in class 0 polls As an alternative it is recommended that actual status values of Control Relay Output Block points be looped around and mapped as Binary...

Page 231: ...1 Default Command Event Object 13 Assigned Class 1 2 3 or none Default Variation Command Event Object 13 CROB Supported Operations Default CROB Operations 1 RL 1 0 2 2 0 1 Pulse On Latch On Close Pulse On 2 RL 2 0 2 2 0 1 Pulse On Latch On Close Pulse On 3 RL 3 0 2 2 0 1 Pulse On Latch On Close Pulse On 4 RL 4 0 2 2 0 1 Pulse On Latch On Close Pulse On 5 RL 5 0 2 2 0 1 Pulse On Latch On Close Puls...

Page 232: ...t CROB Operations Trip 43 Hot Line Working on off 0 2 2 0 1 Pulse On Pulse Off Latch On Latch Off Close Trip Pulse On Pulse Off Latch On Latch Off 44 E F off on 0 2 2 0 1 Pulse On Pulse Off Latch On Latch Off Close Trip Pulse On Pulse Off Latch On Latch Off 45 SEF off on 0 2 2 0 1 Pulse On Pulse Off Latch On Latch Off Close Trip Pulse On Pulse Off Latch On Latch Off 46 Inst Protection off on 0 2 2...

Page 233: ...Command Event Object 13 CROB Supported Operations Default CROB Operations Close 56 CB 1 Trip Lockout write only location 0 2 2 0 1 Pulse On Latch On Close Pulse On 59 Demand metering reset write only location 0 2 2 0 1 Pulse On Latch On Close Pulse On 87 Reset Energy Meters 0 2 2 0 1 Pulse On Latch On Close Pulse On 88 Remote mode 0 2 2 0 1 Pulse On Latch On Close Pulse On 89 Service mode 0 2 2 0 ...

Page 234: ...d Event Object 13 Assigned Class 1 2 3 or none Default Variation Command Event Object 13 CROB Supported Operations Default CROB Operations Close 106 User SP Command 8 0 2 2 0 1 Pulse On Latch On Close Pulse On 107 User DP Command 1 0 2 2 0 1 Pulse On Pulse Off Latch On Latch Off Close Trip Pulse On Pulse Off 108 User DP Command 2 0 2 2 0 1 Pulse On Pulse Off Latch On Latch Off Close Trip Pulse On ...

Page 235: ...d Event Object 13 CROB Supported Operations Default CROB Operations Latch Off Close Trip 115 CB 1 Open 0 2 2 0 1 Pulse On Latch On Close Pulse On Latch On 116 CB 1 Close 0 2 2 0 1 Pulse On Latch On Close Pulse On Latch On 5 3 4 Counters The following table lists both Binary Counters Object 20 and Frozen Counters Object 21 When a freeze function is performed on a Binary Counter point the frozen val...

Page 236: ... or none Default Variation Static Object 20 Default Variation Event Object 22 Deadband Is Resettable IsFreezable Default Change Event Assigned Class 1 2 3 or none Default Variation Static Object 21 Default Variation Event Object 23 0 Waveform Records 0 3 5 1 1 0 2 9 1 1 Fault Records 0 3 5 1 1 0 2 9 1 2 Event Records 0 3 5 1 1 0 2 9 1 3 Data Log Records 0 3 5 1 1 0 2 9 1 5 StartCount 0 3 5 1 1 0 2...

Page 237: ...ecision floating point Point Index Description Default Change Event Assigned Class 1 2 3 or none Default Variation Static Object 30 Default Variation Event Object 32 Default Multiplier Default Deadband 0 Frequency 0 3 2 4 100 000 1 000 1 Vab Primary 0 3 2 4 0 010 100 000 2 Vbc Primary 0 3 2 4 0 010 100 000 3 Vca Primary 0 3 2 4 0 010 100 000 4 Va Primary 0 3 2 4 0 010 100 000 5 Vb Primary 0 3 2 4 ...

Page 238: ... 000 0 100 57 Active Power A 0 3 2 4 0 000 1000000 000 58 Active Power B 0 3 2 4 0 000 1000000 000 59 Active Power C 0 3 2 4 0 000 1000000 000 60 P 3P 0 3 2 4 0 000 1000000 000 61 Reactive Power A 0 3 2 4 0 000 1000000 000 62 Reactive Power B 0 3 2 4 0 000 1000000 000 63 Reactive Power C 0 3 2 4 0 000 1000000 000 64 Q 3P 0 3 2 4 0 000 1000000 000 65 Apparent Power A 0 3 2 4 0 000 1000000 000 66 Ap...

Page 239: ...00 1000000 000 112 Q 3P Max 0 3 2 4 0 000 1000000 000 115 Isef Primary 0 3 2 4 1 000 10 000 116 Isef Secondary 0 3 2 4 1000 000 0 050 117 Isef Nominal 0 3 2 4 1000 000 0 050 135 CB Total Trip Count 0 3 1 3 1 000 1 000 136 CB Delta Trip Count 0 3 1 3 1 000 1 000 137 CB Count To AR Block 0 3 1 3 1 000 1 000 138 CB Frequent Ops Count 0 3 1 3 1 000 1 000 165 Ia Last Trip 0 3 1 3 1 000 Disabled 166 Ib ...

Page 240: ...alog Input Reporting Deadband Variation reported when variation 0 requested 1 16 Bit or 2 32 Bit or 3 Single Precision floating point Point Index Description Default Change Event Assigned Class 1 2 3 or none Default Variation Static Object 30 Default Variation Event Object 32 Default Multiplier Default Deadband 197 S 3P Max 0 3 2 4 0 000 1000000 000 330 CB Trip Time Meter 0 3 2 4 1000 000 0 010 5 ...

Page 241: ...Chapter 4 7SR120 Data Communications Definitions 2017 Siemens Protection Devices Limited Chapter 4 Page 73 of 84 6 Not Applicable This section intentionally left blank ...

Page 242: ...7SR120 Technical Manual Chapter 4 Page 74 of 84 2017 Siemens Protection Devices Limited ...

Page 243: ... IEC61850 Protocol Support 7 1 Introduction The relay can optionally be provided with IEC61850 comms For further details refer to the following publications Model Implementation Conformance Statement MICS Protocol Implementation Conformance Statement PICS Protocol Implementation Extra Information for Testing PIXIT ...

Page 244: ...7SR120 Technical Manual Chapter 4 Page 76 of 84 2017 Siemens Protection Devices Limited ...

Page 245: ...e configured as auto answer This will allow it to initiate communications with the relays Next the user should set the data configuration at the local port i e baud rate and parity so that communication will be at the same rate and format as that set on the relay and the error correction is disabled Auto answer usually requires two parameters to be set The auto answer setting should be switched on...

Page 246: ...7SR120 Technical Manual Chapter 4 Page 78 of 84 2017 Siemens Protection Devices Limited ...

Page 247: ...d loaded from disc to work offline The protocols will be stored in a Reyrolle Protection Device Comms file RPDC which will be stored locally so that the editor can be used when the relay is not connected DNP3 The tool will allow Data Points to be enabled or disabled Changing the point numbers for the Binary Inputs Double Bit Inputs Binary Outputs Counters and Analogue Inputs Changing their assigne...

Page 248: ...an check if the relay contains user configured communication files via a meter in the relay menus Pressing the Enter and down arrow buttons on the fascia then scrolling down the number of files stored in the relay is displayed The file name can also be viewed by pressing the Cancel and Test Reset buttons together when in the relay Instruments menu The user must ensure when naming the file they use...

Page 249: ...tions simultaneously Half Duplex Asynchronous Communications Communications in two directions but only one at a time Hayes AT Modem command set developed by Hayes Microcomputer products Inc LAN Local Area Network A computer network covering a small geographic area LC Fibre optic connector type designed by Lucent Technologies Inc Line Idle Determines when the device is not communicating if the idle...

Page 250: ...ices Limited Start Bit Bit logical 0 sent to signify the start of a byte during data transmission Stop Bit Bit logical 1 sent to signify the end USB Universal Serial Bus standard for the transfer of data WAN Wide Area Network A computer network covering a large geographic area ...

Page 251: ...Mode Function Local Remote Out of Service Control Com1 when Com1 Mode Local when Com1 Mode Remote Com2 USB when Com2 Mode Local when Com2 Mode Remote Fascia Control Mode Function Key n when F Key n Mode Remote Binary Input n when BI n Mode Local when BI n Mode Remote Binary Outputs Reporting Spontaneous IEC DNP3 General Interrogation IEC DNP3 MODBUS Change Settings Com1 when Com1 Mode Local when C...

Page 252: ...s Limited Siemens Protection Devices Ltd SPDL P O Box 8 Hebburn Tyne and Wear NE31 1TZ United Kingdom For enquiries please contact our Customer Support Centre Tel 49 180 524 8437 24hrs Fax 49 180 524 2471 E Mail support ic siemens com www siemens com reyrolle Template Revision 17 ...

Page 253: ...se Any and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Installation Guide Document Release History This document is issue 2017 05 The list of revisions up to and including this issue is 2017 05 Addition clauses added to suit IEC 60255 27 2016 11 Ethernet Redundancy added to Electrical interface variants 2016 03 Two CT arrangement for isolated or compens...

Page 254: ...7SR11 7SR12 Installation Guide Chapter 5 Page 2 of 32 2017 Siemens Protection Devices Limited ...

Page 255: ...EF Relay with 3BI 5BO 13 5 2 Wiring Diagram 7SR1102 OC EF Relay with 3BI 5BO 14 5 3 Wiring Diagram 7SR1103 OC EF Relay with 6 BI 8BO 15 5 4 Wiring Diagram 7SR1107 OC EF Relay with 4 BI 8BO 16 5 5 Wiring Diagram 7SR1204 Directional EF Relay with 3BI 5BO 17 5 6 Wiring Diagram 7SR1205 Directional OC EF Relay with 3BI 5BO 18 5 7 Wiring Diagram 7SR1206 Directional OC EF Relay with 6BI 8BO 19 5 8 Wiring...

Page 256: ... Figure 5 3 1 7SR1103 Connection Diagram 15 Figure 5 4 1 7SR1107 Connection Diagram 16 Figure 5 5 1 7SR1204 Connection Diagram 17 Figure 5 6 1 7SR1205 Connection Diagram 18 Figure 5 7 1 7SR1206 Connection Diagram 19 Figure 5 8 1 7SR1208 Connection Diagram 20 Figure 6 1 1 RS485 Data Comms Connections Between Relays 28 Figure 6 2 1 Ethernet connection for IEC 61850 star connection 29 Figure 6 2 2 Et...

Page 257: ...ay case while auxiliary voltage is present There can be no requirement to disassemble any relay since there are no user serviceable parts in the relay If any modules have been tampered with then the guarantee will be invalidated Siemens Protection Devices Limited reserves the right to charge for any subsequent repairs 1 3 Recommended Mounting Position The relay uses a liquid crystal display LCD fo...

Page 258: ...arths of all the Relays installed in a panel to prevent earth current loops posing a risk to personnel 1 6 Ancillary Equipment The relay can be interrogated locally or remotely For local interrogation a portable PC with suitable version of MS Windows 2000 SP4 XP SP2 W7 and Reydisp Evolution Latest Version available 32 bit or Reydisp Manager s w using USB port situated on front of the relay 1 7 Dis...

Page 259: ...n circuited Non observance of this precaution can result in injury to personnel or damage to equipment 2 2 External Resistors Where external resistors are connected to the relay circuitry these may present a danger of electric shock or burns if touched 2 3 Front Cover The front cover provides additional securing of the relay element within the case The relay cover should be in place during normal ...

Page 260: ...READ FORMING TRILOBULAR SCREWS THESE ARE SUPPLIED AS STANDARD AND ARE SUITABLE FOR USE IN FERROUS ALUMINIUM PANELS 1 6mm THICK AND ABOVE FOR OTHER PANELS HOLES TO BE M4 CLEARANCE TYPICALLY 4 5 DIAMETER AND RELAYS MOUNTED USING M4 MACHINE SCREWS NUTS AND LOCKWASHERS SUPPLIED IN PANEL FIXING KIT PANEL CUT OUT 168 78 98 5 159 10 25 Diameter 3 6 4 holes see note FRONT VIEW 103 5 177 SIDE VIEW 31 216 5...

Page 261: ...T 168 130 150 159 10 Diameter 3 6 4 holes see note FRONT VIEW 155 5 177 SIDE VIEW 31 216 5 151 5 11 Case Earth connection Typical when fitted MINIMUM CLEARANCES 25mm FOR TERMINAL WIRING 75mm FOR ETHERNET COMMS MODULE Figure 3 1 3 Overall Dimensions mm and panel Drilling for Size E6 Epsilon case Hardware Model Net Weight kg 7SR1101 2 7 7SR1102 3 2 7SR1103 3 2 7SR1107 3 2 7SR1204 2 7 7SR1205 3 2 7SR...

Page 262: ...Crimps Ring tongued crimps with 90 bend are recommended 3 2 2 Panel Fixings Typical mounting screw kit per Relay Consists of 4 off M4x10mm Screws 4 off M4 Nuts 4 off M4 Lock Washer Typical rear terminal block fixing kit 1kit per terminal block fitted to relay Consists of 28 off M4 8mm Screws 28 off M4 Lock Washer ...

Page 263: ...Figure 4 1 2 E6 Case viewed from rear Notes 1 Recommended terminations are pre insulated and must be crimped using approved tooling 2 RS485 Block B Terms 14 16 18 20 connection to this communication facility is by screened twisted pair cable On site when wiring other facilities ensure that these terminals are not obscured by other wiring runs Cable should be RS485 compliant ...

Page 264: ...ens Protection Devices Limited To withdraw relay check rear ethernet positions are clear and remove retaining screw Ethernet Comms Input Connectors Figure 4 1 4 E6 Case Terminal Arrangement viewed from rear Figure 4 1 3 E4 Case Terminal Arrangement viewed from rear ...

Page 265: ...8 2 4 BI 2 ve ve 6 8 BI 3 ve ve 10 12 14 16 18 20 IL4 25 26 27 28 BO 2 6 5 4 1 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A B Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Rear View Arrangement of terminals and modules A RS485 Screen B Term Figure 5 1 1 7SR1101 Con...

Page 266: ...3 IL4 25 26 27 28 BO 2 6 5 4 1 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A B Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Rear View Arrangement of terminals and modules Data Comms Optional A RS485 Screen B Ter...

Page 267: ... 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A B Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Rear View Arrangement of terminals and modules BI 4 ve 3 BI 5 ve 5 BI 6 ve ve 7 1 BO 7 11 13 BO 8 15 9 BO 6 Data Comm...

Page 268: ... 6 5 4 1 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A B Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output Rear View Arrangement of terminals and modules Data Comms Optional BI 4 ve 3 ve 1 15 13 BO 8 11 9 BO 7 7 5 BO...

Page 269: ...ve ve 10 12 14 16 18 20 IL4 25 26 27 28 BO 2 6 5 4 1 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A V1 17 19 V2 21 23 V3 25 27 Rear View Arrangement of terminals and modules Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output B A RS485 Screen B Term Figure 5 5 1 7SR1204 Co...

Page 270: ...5 26 27 28 BO 2 6 5 4 1 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A V1 17 19 V2 21 23 V3 25 27 Rear View Arrangement of terminals and modules Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output B Data Comms Optional ...

Page 271: ...BI 6 ve ve 7 1 BO 2 6 5 4 1 2 3 BO 3 8 7 BO 7 11 13 BO 8 15 9 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A BO 6 V1 17 19 V2 21 23 V3 25 27 Rear View Arrangement of terminals and modules Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary...

Page 272: ... 2 3 BO 3 8 7 BO 4 10 9 BO 5 12 11 1A 5A 13 14 15 16 1A 5A 17 18 19 20 1A 5A 21 22 23 24 1A 5A A Analogue B PSU 1 2 27 28 1 2 27 28 A V1 17 19 V2 21 23 V3 25 27 Rear View Arrangement of terminals and modules Shows contacts internal to relay case assembly Contacts close when the relay chassis is withdrawn from case NOTES BI Binary Input BO Binary Output B Data Comms Optional BI 4 ve 3 ve 1 15 13 BO...

Page 273: ... A27 A28 A B C S2 S1 P2 P1 Direction of power flow In the forward direction ISEF 50SEF 51SEF Measured Sensitive E F 1A 5A ISEF A25 A26 A27 A28 A B C S2 S1 P2 P1 Direction of power flow In the forward direction 1A 5A ISEF A25 A26 A27 A28 A B C P2 P1 Direction of power flow In the forward direction S2 S1 IREF 64H Measured Restricted E F 1A 5A I A25 A26 A27 A28 A B C S2 S1 P2 P1 Direction of power fl...

Page 274: ...In CT VT CONFIG Phase Current Input Phase CT Ratio 50 51 Phase Overcurrent 50N 51N Derived E F Selects 1 or 5A CT ratio for primary meters 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forward direction ...

Page 275: ...N Derived E F 50G 51G Measured E F Selects 1 or 5A CT ratio for primary meters 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forward direction 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forwa...

Page 276: ...N Derived E F 50G 51G Measured E F Selects 1 or 5A CT ratio for primary meters 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forward direction 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forwa...

Page 277: ... A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forward direction S2 S1 P2 P1 Ia Ib Ic In Ig CT VT CONFIG Phase Current Input Phase CT Ratio Phase Overcurrent Derived E F Measured Standby E F Selects 1 or 5A CT ratio for primary meters 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A...

Page 278: ... Direction of power flow In the forward export direction 1A 5A Ig A25 A26 A27 A28 Ic Ib 1A 5A A21 A22 A23 A24 1A 5A A17 A18 A19 A20 Ia 1A 5A A13 A14 A15 A16 A B C S2 S1 P2 P1 Direction of power flow In the forward direction S2 S1 P2 P1 CT VT CONFIG Phase Current Input Selects 1 or 5A CT VT CONFIG Phase CT Ratio CT ratio for primary meters CT VT CONFIG Earth Current Input Selects 1 or 5A for Sensit...

Page 279: ... Vbn Vcn 67 67N 67G 47 59N 27 59 81 Phase Neutral Phase Phase Calculated NPS ZPS A B C B17 B19 B21 B23 B25 B27 Va Vb Vc Va Vb Vc 67 67N 67G 47 27 59 81 Phase Neutral Phase Phase Calculated NPS No ZPS available A B C B17 B19 B21 B23 B25 B27 Va Vb Vc Vab Vbc 3Vo 67 67N 67G 47 59N 27 59 81 Phase Neutral Calculated Phase Phase Phase Vca Calculated NPS ZPS A B C B17 B19 B21 B23 B25 B27 Va Vb Vc Dn Da ...

Page 280: ... identify the polarity of any equipment to be connected typically measured at each terminal in turn to ground Connection of the device to a termination network at the end of the bus will also be to suit the quiescent state as shown below The polarity marking is often found to be reversed or marked as on other equipment so care is required If the devices are connected in reverse communication to al...

Page 281: ...ommended minimum for the fibre used typically 50 mm is acceptable 62 5 125 µm glass fibre with Duplex LC connector recommended for all distances To Control System Switch Ch n Ch 2 Ch 1 62 5 125 µm fibre optic with Duplex LC connectors or RJ45 electrical connectors Ch 2 Ch 1 Ch 1 Ch 3 Ch 2 Ch 1 Input Ch 2 Figure 6 2 1 Ethernet connection for IEC 61850 star connection Switch Ch n Ch 2 Ch 1 Ch 2 Ch 1...

Page 282: ...he Ethernet port please see the Reydisp Manager User guide Depending on the EN100 module type and Firmware version the following protocol options are available Interface Type EN100 Firmware Line Mode Switch Mode RSTP OSM PRP HSR Electrical RJ45 EN100 4 08 or earlier Electrical RJ45 EN100 4 21and later Optical EN100 4 08 or earlier Optical EN100 4 21and later Table 2 EN100 Redundancy availability 6...

Page 283: ...dard is based on double transmission of message frames over ring topology networks in both directions In the case of an error the message frame will be transmitted without any delay No reconfiguration time is necessary for the network as is the case for RSTP PRP need to be enabled on the device within Reydisp Manager See Reydisp Manager user guide Figure 6 3 2 PRP Ethernet Network Configuration ...

Page 284: ...s based on double transmission of message frames over ring topology networks in both directions In the case of an error the message frame will be transmitted without any delay No reconfiguration time is necessary for the network HSR needs to be enabled on the device within Reydisp Manager See Reydisp Manager user guide Network rings with up to 50 devices is possible Figure 6 3 3 HSR Ethernet Netwo...

Page 285: ... for any loss or damage caused by any error or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Commissioning and Maintenance Guide Document Release History This document is issue 2017 05 The list of revisions up to and including this issue is 2017 05 Minor error i...

Page 286: ...7SR11 7SR12 Commissioning and Maintenance Guide 2017 Siemens Protection Devices Limited Chapter 6 Page 2 of 72 ...

Page 287: ...sh Detection 50AFD 23 2 6 Directional Earth Fault Polarity Check 67N 24 2 7 Derived Earth Fault 67 50N 67 51N 25 2 7 1 Directional Polarity 26 2 7 2 Definite Time Overcurrent 50N 26 2 7 3 Inverse Time Overcurrent 51N 26 2 8 Measured Earth fault 67 50G 67 51G 29 2 8 1 Directional Polarity 30 2 8 2 Definite Time Overcurrent 67 50G 30 2 8 3 Inverse Time Overcurrent 67 51G 30 2 9 Sensitive Earth fault...

Page 288: ...Transformer Supervision 60VTS 62 3 2 1 1 or 2 Phase VT fail 62 3 2 2 3 Phase VT fail 63 3 3 Current Transformer Supervision 60CTS 64 3 3 1 7SR11 64 3 3 2 7SR12 65 3 4 Broken Conductor 46BC 66 3 5 Trip Close Circuit Supervision 74T CCS 68 3 6 Magnetising Inrush Detector 81HBL 69 Section 4 Control Logic Functions 70 4 1 Autoreclose 79 70 4 2 Quick Logic 70 Section 5 Testing and Maintenance 71 5 1 Pe...

Page 289: ...Fault 33 Figure 2 11 Restricted Earth Fault 37 Figure 2 12 Negative Phase Sequence Overcurrent 39 Figure 2 13 Undercurrent 42 Figure 2 14 Thermal Overload 44 Figure 2 15 Phase Under Over Voltage 46 Figure 2 16 NPS Overvoltage 48 Figure 2 17 Neutral Overvoltage 50 Figure 2 18 Under Over Frequency 52 Figure 2 19 Power 54 Figure 2 20 Sensitive Power 56 Figure 2 21 Power Factor 58 Figure 2 22 CB Fail ...

Page 290: ...hover Fused test leads should not be used where the measurement of a current transformer C T secondary current is involved the failure or blowing of an instrument fuse or the operation of an instrument cut out could cause the secondary winding of the C T to become an open circuit Open circuit secondary windings on energised current transformers are a hazard that can produce high voltages dangerous...

Page 291: ... checked to ensure that the required in service settings are being applied 1 2 5 Precautions Before electrical testing commences the equipment should be isolated from the current and voltage transformers The current transformers should be short circuited in line with the local site procedure The tripping and alarm circuits should also be isolated where practical The provision and use of secondary ...

Page 292: ...on as described in this document For all high current tests it must be ensured that the test equipment has the required rating and stability and that the relay is not stressed beyond its thermal limit 1 3 3 Primary Injection Tests Primary injection tests are essential to check the ratio and polarity of the transformers as well as the secondary wiring Note If the current transformers associated wit...

Page 293: ...nput may be programmed to perform a specific function each binary should be checked to prove that its mapping and functionality is as set as part of the Scheme Operation tests Where the pick up timers associated with a binary input are set for DC operation these delays should be checked either as part of the scheme logic or individually To check a binary pick up time delay temporarily map the bina...

Page 294: ...s specified in the Output Config Binary Output Config menu for each output relay and may be too short to measure with a continuity tester An alternative method of energising an output permanently so that wiring can be checked is to temporarily map the relay being tested to the Protection Healthy signal in the Output Matrix as this signal is permanently energised the mapped relay will be held energ...

Page 295: ...ct value after testing The table below indicates functions where function conflicts may occur during testing consideration should be given to disabling functions to avoid interference Any LED can be assigned to be a General Pickup LED in the Output Matrix menu and used to assess operation of functions during testing if other functions are disabled or if the setting allocating General Pickup is tem...

Page 296: ... direction is not affected by the Phase Rotation direction In the INSTRUMENTS MODE display indication is provided in the DIRECTIONAL METERS menu which displays current direction under P F Dir as forward or reverse based on the output states of the directional elements i e whether they see forward current reverse current or neither for each pole with respect to the 67 Char Angle setting in the Phas...

Page 297: ...nts a b c and d C A 750 950 750 950 A B D C a d b c FWD REV 600 300 00 2700 1800 2100 2400 900 VBC Figure 2 1 Directional Phase Fault Boundary System Angles 5 With the instrument reading Fwd or Rev reduce the voltage until the element resets Record the minimum phase phase operate voltage Minimum Voltage Setting Measured 2 1 1 2 out of 3 logic Ensure that at least 1 Phase Overcurrent element is set...

Page 298: ...testing it may be useful to disable some functions to avoid ambiguity It should be particularly noted that if the function is enabled the 51C Cold Load settings may modify the normal 50 n and 51 n settings if the CB is open during testing Voltage inputs may not be required for this function if the Phase Overcurrent functions are not directional but it may be advantageous to apply balanced 3 phase ...

Page 299: ...M Operate Current Operate Time P U Amps D O Amps Tol 2 x Is sec 5 x Is sec Tol IL1 IA IL2 IB IL3 IC Calculated Timing values in seconds for TM 1 0 Curve 2 xIs 5 xIs IEC NI 10 03 4 28 IEC VI 13 50 3 38 IEC EI 26 67 3 33 IEC LTI 120 00 30 00 ANSI MI 3 80 1 69 ANSI VI 7 03 1 31 ANSI EI 9 52 1 30 Note that the operate time may be subject to the Minimum op time setting for the element and or may have a...

Page 300: ...me Check correct indication trip output alarm contacts waveform record 2 2 2 3 IEC RESET If the element is configured as an IEC characteristic it may have an IEC decaying reset delay applied IEC reset times from operated condition to fully reset are as follows for zero applied current and Time multiplier TM 1 0 The reset curve characteristic type and TM is defined by the operating characteristic C...

Page 301: ...ting Ensure that the thermal rating of the relay is not exceeded Gradually reduce the voltage until the a b voltage is less than the Voltage setting Pickup LED operation can be used to confirm the Voltage setting If the 51V n current setting is above the continuous rating of the relay an alternative procedure should be used apply test current in short duration shots with applied voltage being grad...

Page 302: ...ote that these elements may be set as directional If this is the case the phase angle of the current must be set with respect to the voltage to produce operation of the elements Voltage Setting V p p Measured V p p I Setting Multiplier Calculated PU Measured Tolerance 51 1 Pickup 51 2 Pickup 51 3 Pickup 51 4 Pickup 2 3 1 1 Element Blocking The Voltage Controlled Overcurrent function can be set to ...

Page 303: ... x2 81 x4 Figure 2 4 Cold Load Voltage Inputs VL1 VA VL2 VB VL3 VC for directional elements Current Inputs IL1 IA IL2 IB IL3 IC Disable 51V 46 49 50CBF 79 Map Pickup LED 51 n Self Reset The CB must be open for more than the Cold Load Pick up Time to allow testing of this function It may be convenient to reduce this setting to suit the test procedure If the CB is open throughout the tests the Cold ...

Page 304: ...Current Level for greater than the Reduced Current Time Check the Cold Load Pick up Delay by applying or simulating CB Open Measure the time delay before Cold Load Active is raised Apply current above the Reduced Current Level if this functionality is Enabled before applying CB Closed Measure the time for Cold Load Active to reset 2 4 1 Inverse Time Overcurrent 51C It will be advantageous to map t...

Page 305: ... for the element at this current level Repeat the test with the reset time b reduced to 50 of the previous value Ensure that the second operate time c is 50 of the first a operate time Check correct indication trip output alarm contacts waveform record 2 4 1 2 IEC Reset If the element is configured as an IEC characteristic it may have an IEC decaying reset delay applied IEC reset times from operat...

Page 306: ... 3 Element Blocking The 51c Overcurrent elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 51c Operate time expected Reset time calculated Operate time measured 50 Reset Time calculated 50 operate time calculated 50 operate time measured First test c Second Test c ...

Page 307: ...set The overcurrent level can be tested without an arc flash by separately energising or inverting the arc detector binary input continuously for the duration of the test for the zone being tested If the current setting is low gradually increase current until element operates If the current level required is greater than the thermal limit of the relay apply 0 9x setting check for no operation appl...

Page 308: ... the ph n voltage by 15º Alternatively a single phase voltage source can be used in the above test The polarity of this voltage applied to the faulted phase neutral alone must be reversed to produce the same residual voltage Vres phase direction as that produced by the 3P voltage simulation described above For the Phase Voltage Config of Vab Vbc Vo the single phase voltage applied to the Vo input ...

Page 309: ...64H 47 x2 59N x2 81 x4 Figure 2 8 Derived Earth Fault Voltage Inputs VL1 VA VL2 VB VL3 VC Current Inputs IL1 IA IL2 IB IL3 IC Disable 37 46 49 60CTS 50CBF 60CTS 46BC 79 Map Pickup LED 51N n 50N n Self Reset Other protection functions may overlap with these functions during testing it may be useful to disable some functions to avoid ambiguity Derived EF Measured EF Sensitive EF Restricted EF protec...

Page 310: ...tion should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase 3P current and check that the element does not operate If VTS action is set to Non Directional this option should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase current and check that the element operates at its normal sett...

Page 311: ...31 ANSI EI 9 52 1 30 Note that the operate time may be subject to the Minimum op time setting for the element and or may have a Follower DTL applied 2 7 3 1 Element Blocking The Derived Earth Fault elements can be blocked by Binary Input Inhibit VT Supervision and Inrush Detector operation The Characteristic can be made non directional by VT Supervision This functionality should be checked Element...

Page 312: ...form record 2 7 3 3 IEC Reset If the element is configured as an IEC characteristic it may have an IEC decaying reset delay applied IEC reset times from operated condition to fully reset are as follows for zero applied current and Time multiplier TM 1 0 The reset curve characteristic type and TM is defined by the operating characteristic Curve Fully operated to reset with Zero current applied TM 1...

Page 313: ... 64H 51c 51c 51c 47 x2 59N x2 81 x4 Figure 2 9 Measured Earth Fault Voltage Inputs VL1 VA VL2 VB VL3 VC for directional elements Current Inputs I4 IG Disable 50CBF 79 Map Pickup LED 51G n 50G n Self Reset Other protection functions may overlap with these functions during testing it may be useful to disable some functions to avoid ambiguity Derived EF Measured EF Sensitive EF Restricted EF protecti...

Page 314: ...on should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase current and check that the element does not operate If VTS action is set to Non Directional this option should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase current and check that the element operates at its normal s...

Page 315: ...to cause a VTS condition Increase a phase current and check that the element does not operate If VTS action is set to Non Directional this option should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase current and check that the element operates at its normal setting Reverse the voltage phase direction whilst checking that the element do...

Page 316: ...form record 2 8 3 3 IEC Reset If the element is configured as an IEC characteristic it may have an IEC decaying reset delay applied IEC reset times from operated condition to fully reset are as follows for zero applied current and Time multiplier TM 1 0 The reset curve characteristic type and TM is defined by the operating characteristic Curve Fully operated to reset with Zero current applied TM 1...

Page 317: ...Enabled Disabled individually or as groups in the Function Config menu Sensitive EF elements can be separated from Derived EF by secondary injection of current through the I4 input circuit only If any of these elements are defined as directional the correct voltage phase direction will be required to produce an operation of those elements The 67SEF elements will normally operate on the residual cu...

Page 318: ...to directional If VTS action is set to BLOCK this option should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase current and check that the element does not operate If VTS action is set to Non Directional this option should be tested Apply balanced voltage and current Reduce a phase voltage to cause a VTS condition Increase a phase curre...

Page 319: ...G TESTS Ph Dir Char NI EI VI LTI DTL Is A TM Operate Current Operate Time P U Amps D O Amps Tol 2 x Is sec 5 x Is sec Tol I4 Calculated Timing values in seconds for TM 1 0 Curve 2 xIs 5 xIs IEC NI 10 03 4 28 IEC VI 13 50 3 38 IEC EI 26 67 3 33 IEC LTI 120 00 30 00 ANSI MI 3 80 1 69 ANSI VI 7 03 1 31 ANSI EI 9 52 1 30 Note that the operate time may be subject to the Minimum op time setting for the ...

Page 320: ...cts waveform record 2 9 4 3 IEC Reset If the element is configured as an IEC characteristic it may have an IEC decaying reset delay applied IEC reset times from operated condition to fully reset are as follows for zero applied current and Time multiplier TM 1 0 The reset curve characteristic type and TM is defined by the operating characteristic Curve Fully operated to reset with Zero current appl...

Page 321: ...t Inputs I4 IREF Disable 51SEF 50SEF 79 Map Pickup LED 64H Self Reset The setting resistance should be measured and the value compared to that specified in the settings data Both values should be recorded Settings Data Resistor Value Measured The high value of setting resistance R will often interfere with secondary current injection when using a digital test set It is normal practice in these cas...

Page 322: ... of contact with any of the energised secondary wiring during the test Settings Data Voltage Setting Measured To complete testing of the REF requires primary injection through the phase and residual REF CT in series to simulate an out of zone fault and ensure stability of the relay The test can then be repeated with the REF CT secondary connections reversed to prove operation 2 10 1 1 Element Bloc...

Page 323: ... Voltage Inputs n a Current Inputs IL1 IA IL2 IB IL3 IC Disable 51 51V 51C 37 49 50CBF 60CTS 46BC Map Pickup LED 46IT 46DT Self Reset Where two NPS elements are being used with different settings it is convenient to test the elements with the highest settings first The elements with lower settings can then be tested without disabling the lower settings The Thermal withstand limitations of the curr...

Page 324: ...d to temporarily drive the relevant Pickup output in the Pickup Config sub menu in the Output Config menu as this will allow the Pick up led to operate for the function Gradually increase current until Pickup LED operates Apply 2x setting current and record operating time Apply 5x setting current and record operating time Compare to calculated values for operating times P U D O TIMING TESTS Ph Dir...

Page 325: ...rrent for the reset time above xTM c 2x setting for a time to ensure element operation Check that the second operation c is similar to the first a and in line with the expected operate time for the element at this current level Repeat the test with the reset time b reduced to 50 of the previous value Ensure that the second operate time c is 50 of the first a operate time 2 11 2 2 Element Blocking ...

Page 326: ...lf Reset Undercurrent Guard As required Undercurrent start Any or ALL If two Undercurrent 37 elements are used with different settings it is convenient to test the element with the lowest setting first The higher setting element can then be tested without interference from the other element Apply 3Phase balanced current or single phase current on the single pole relay models and earth fault functi...

Page 327: ...ment Blocking The Undercurrent elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 37 1 37 2 37G 1 or 37SEF 1 37G 2 or 37SEF 2 2 12 1 2 Element Blocking from current guard The elements can be blocked by undercurrent guard function This functionality should be checked Element Guard Setting Blocked 37 1 37 2 Check correct phase indication trip out...

Page 328: ... Vcn 60 CTS 60 VTS 50BF 51c 51c 51c 64H 81 x4 Figure 2 14 Thermal Overload Voltage Inputs n a Current Inputs IL1 IA IL2 IB IL3 IC Disable 51 50 37 50CBF Map Pickup LED 49Alarm The current can be applied from a 3P balanced supply or phase by phase from a 1P supply Alternatively the 3 phase current inputs can be connected in series and injected simultaneously from a single 1P source The Thermal Over...

Page 329: ...he thermal State then apply 2x the Overload Setting current Calculated Operate Time s Measured Operate Time s If the Thermal Overload Capacity Alarm is used this can be tested by monitoring the Thermal Capacity in the instruments menu If the Thermal time constant is longer than a few minutes this can be assessed during the timing test above If the Time Constant is less than a few minutes a lower m...

Page 330: ...ing the lower settings Note that if the voltage is reduced below the 27UVG setting the function may be blocked VTS operation may also block the 27 Undervoltage function Current inputs are not normally required to stabilise the relay during voltage element testing If the O P Phases is set to All the voltage on all phases must be reduced simultaneously Otherwise the 3 phases should be tested individ...

Page 331: ... nominal Volts and the LED will extinguish Record the reset voltage to check the Hysteresis setting If the DTL setting is long the operate level can be checked by applying 100 of setting to cause operation followed by setting minus the Hysteresis setting to cause reset Connect the relevant output contact s to stop the test set Step the applied voltage to a level above the setting The test set shou...

Page 332: ... element operation occurs Slowly reduce the applied voltage until the 27 Undervoltage element resets this can be detected by the General Pickup LED reset if no other element is operated this includes any Undervoltage element which is not UV Guarded Phase Setting Volts Tolerance V element Used for test Blocked Volts NOTES UVG 2 14 3 NPS Overvoltage 47 7SR12 46 BC 46 NPS x2 37 x2 49 50 BF 51V VL1 VA...

Page 333: ...bit This functionality should be checked Element BI Inhibits 47 1 47 2 Check correct indication trip output alarm contacts waveform record 2 14 4 Undervoltage Guard 47 U V Guard If any 47 NPS overvoltage element is set to be inhibited by the 47 Undervoltage Guard element this function should be tested Connect the test voltage inputs to suit the installation wiring diagram utilising any test socket...

Page 334: ...ilize other functions Disable 27 59 47 60VTS Map Pickup LED 59N n Self Reset The voltage source for the Neutral Overvoltage 59N function is Vn calculated from the applied 3 phase voltage inputs To test apply test voltage to one phase input 2 14 6 Definite Time 59NDT If DTL setting is small gradually increase single phase voltage until element operates If DTL is large apply 0 9x setting check for n...

Page 335: ... for operating times from 1 1 sec Vs Vn op M t Where M Time multiplier and Vn Vs multiple of setting Phase Setting Volts TM Operate Voltage Operate Time P U Volts D O Volts Tolerance 2 x Vs sec x Vs sec Tolerance E 2 14 7 1 Element Blocking The Neutral Overvoltage elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 59NIT 59NDT Check correct indi...

Page 336: ... step changes in frequency during testing do not reflect normal system operation Normal instantaneous operation of the frequency element is 140 175ms in line with the Performance Specification Application of sudden step changes to frequency can add additional delay which can produce misleading test results Gradually increase decrease applied voltage frequency until 81 n operation occurs Elements s...

Page 337: ...level below the 81 U V Guard Setting at a frequency in the operate range Increase the voltage until the relay operates UVG Setting Volts Freq element Used for test Blocked Volts D O Unblocked Volts P U NOTES 2 15 1 1 Element Blocking The U O Frequency elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 81 1 81 2 81 3 81 4 81 5 81 6 Check correct...

Page 338: ...y application 3P current and voltage For Over power the elements with the highest setting should be tested first and for Under power the elements with the lowest settings should be tested first The elements with other settings can then be tested without need to disable the elements already tested From the nominal power setting Sn gradually increase decrease applied voltage or current until 32 n op...

Page 339: ...level below the 32 n U C Guard Setting at a power in the operate range Increase the current until the relay operates UCG UCG Setting xIn Power element Used for test Blocked Current D O Unblocked Current P U NOTES U O Power 2 16 1 1 Element Blocking The U O Power elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 32 1 32 2 Check correct indicati...

Page 340: ...ested by application 1P current and 3P voltage For Over power the elements with the highest setting should be tested first and for Under power the elements with the lowest settings should be tested first The elements with other settings can then be tested without need to disable the elements already tested From the nominal power setting Sn gradually increase decrease applied voltage or current unt...

Page 341: ... a level below the 32S n U C Guard Setting at a power in the operate range Increase the current until the relay operates UCG UCG Setting xIn Power element Used for test Blocked Current D O Unblocked Current P U NOTES U O Power 2 17 1 1 Element Blocking The U O Power elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 32S 1 32S 2 Check correct in...

Page 342: ...2 x2 32 x2 32 x2 55 x2 55 x2 55 x2 50 AFD x2 50 AFD x2 50 AFD x2 32S Figure 2 21 Power Factor Voltage Inputs VL1 VA VL2 VB VL3 VC Current Inputs IL1 IA IL2 IB IL3 IC Disable 49 Map Pickup LED 55 n Self Reset Apply balanced 3 phase rated voltage and current Increase current phase angle until the LED assigned to 55 n is lit Record this angle in the table below Decrease the angle until the LED resets...

Page 343: ...ge 59 of 72 2 18 1 1 Element Blocking The Power Factor elements can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 55 1 55 2 Check correct indication trip output alarm contacts waveform record When testing is complete reinstate any of the disabled functions ...

Page 344: ...reaker fail protection time delays are initiated either from A binary output mapped as Trip Contact in the OUTPUT CONFIG BINARY OUTPUT CONFIG menu or A binary input mapped as 50BF Ext Trip in the INPUT CONFIG INPUT MATRIX menu Or A binary input mapped as 50BF Mech Trip in the INPUT CONFIG INPUT MATRIX menu Apply a trip condition by injection of current to cause operation of a suitable protection e...

Page 345: ...n also receive a trip signal from a protection function where there is no increase in current this trip input should be mapped to 50BF Mech Trip in the INPUT CONFIG INPUT MATRIX menu Initiate this binary input and simulate the circuit breaker remaining closed by ensuring the CB Closed binary Input is energised and ensure operation of the 50BF 1 and 50BF 2 outputs after their programmed delays 50BF...

Page 346: ...CTS 60 VTS 50 BF 51c 51c 51c 64H Figure 2 23 Voltage Transformer Supervision Voltage Inputs VL1 VA VL2 VB VL3 VC Current Inputs IL1 IA IL2 IB IL3 IC Disable 27 47 59N Map Pickup LED 60VTS Self Reset 3 2 1 1 or 2 Phase VT fail Apply 3P balanced nominal current and voltage Reduce 1 phase voltage until VTS operates record voltage reduction level 60VTS V Setting Setting x 3 Measured Voltage Reduction ...

Page 347: ...rate level above Gradually increase the 3P balanced current until the VTS operates Check that the thermal rating of the relay current inputs is not exceeded during the following test Increase the 3P balanced current to a level above the 60VTS Ipps Fault setting Reduce the 3P balanced voltage to a level below the operate level above Gradually reduce the 3P balanced current until the VTS operates Se...

Page 348: ...e mutually exclusive 50 x4 51 x4 50N x4 50 x4 50 x4 51 x4 51 x4 51N x4 50 SEF 51 SEF 79 Optional 60 CTS 50 BF 51c 51c 51c 64H Figure 2 24 Current Transformer Supervision 7SR11 Current Inputs IL1 IA IL2 IB IL3 IC Disable 51N 46IT 46DT 46BC Map Pickup LED 60CTS Self Reset Apply 3Phase balanced current to the relay reduce the current in any one or two phases to a level below 60CTS I setting Measure t...

Page 349: ...n 7SR12 Voltage Inputs VL1 VA VL2 VB VL3 VC Current Inputs IL1 IA IL2 IB IL3 IC Disable 51N 46IT 46DT 46BC Map Pickup LED 60CTS Self Reset The presence of NPS current without NPS voltage is used to indicate a current transformer failure Apply normal 3P balanced current with a crossover of any two phases at a level above 60CTS Inps setting Measure the delay to operation Apply 3P balanced voltage wi...

Page 350: ... ratio of NPS current to PPS current to detect an open circuit conductor These quantities can be produced directly from many advanced test sets but with limited equipment the following approach can be applied Apply 3P balanced current with normal phase rotation direction This current will consist of PPS alone no NPS or ZPS Increase 1 phase current magnitude in isolation to produce NPS The single p...

Page 351: ...30 129 35 161 40 200 46BC Setting 3P balanced current A 1P unbalance current A Measured Unbalance current Apply 1A 1P unbalance current without 3P balanced current Measure 46BC operating time 46BC Delay setting Measured 3 4 1 1 Element Blocking The Broken Conductor element can be blocked by Binary Input Inhibit This functionality should be checked Element BI Inhibits 46BC ...

Page 352: ...ally exclusive 67 50 x4 67 51 x4 67 50N x4 67 50 x4 67 50 x4 67 51 x4 67 51 x4 67 51N x4 67 50 SEF 67 51 SEF 27 59 x4 27 59 x4 27 59 x4 79 Optional Note Example shows Voltage Config Van Vbn Vcn 60 CTS 60 VTS 50 BF 51c 51c 51c 64H 47 x2 59N x2 81 x4 Figure 2 27 Trip Circuit Supervision Voltage Inputs n a Current Inputs n a Disable Map Pickup LED 74TCS n Self Reset The T CCS n Delay can be initiated...

Page 353: ...se of some functions are mutually exclusive 67 50 x4 67 51 x4 67 50N x4 67 50 x4 67 50 x4 67 51 x4 67 51 x4 67 51N x4 67 50 SEF 67 51 SEF 27 59 x4 27 59 x4 27 59 x4 79 Optional Note Example shows Voltage Config Van Vbn Vcn 60 CTS 60 VTS 50 BF 51c 51c 51c 64H 47 x2 59N x2 81 x4 Figure 2 28 Magnetising Inrush Detector Voltage Inputs n a Current Inputs IL1 IA IL2 IB IL3 IC Disable Map Pickup LED Logi...

Page 354: ...to provide a realistic simulation of the actual system conditions The Instruments Menu contains Autoreclose Meters for the Autoreclose State and the Shot No which are useful during sequence testing The time stamped Events listing can be downloaded from the relay to a pc to allow diagnosis of the sequence including measurements of sequence Dead Times and other timing without the use of external mea...

Page 355: ...on of each element 5 2 Maintenance Relay failure will be indicated by the Protection Healthy LED being off or flashing A message may also be displayed on the LCD In the event of failure Siemens Protection Devices Ltd or one of its agents should be contacted see defect report sheet in section 5 3 The relay should be returned as a complete unit No attempt should be made to disassemble the unit to is...

Page 356: ...user intervention This is normal operation default instruments are enabled Remove all instruments from the default list and only add those that are required See Section 2 Settings and Instruments Cannot communicate with the relay Check that all of the communications settings match those used by Reydisp Evolution Check that all cables modems and fibre optic cables work correctly Ensure that IEC 608...

Page 357: ...r or omission whether such error or omission is the result of negligence or any other cause Any and all such liability is disclaimed 2017 Siemens Protection Devices Limited 7SR11 and 7SR12 Applications Guide Document Release History This document is issue 2017 07 The list of revisions up to and including this issue is 2017 07 ARC applications added Minor changes to AC BI description 2017 02 Minor ...

Page 358: ...7SR11 7SR12 Applications Guide Page 2 of 48 2017 Siemens Protection Devices Limited ...

Page 359: ...nder Over Voltage Protection 27 59 29 2 14 Neutral Overvoltage 59N 30 2 14 1 Application with Capacitor Cone Units 31 2 14 2 Derived NVD Voltage 31 2 15 Negative Phase Sequence Overvoltage 47 31 2 16 Under Over Frequency 81 31 2 17 Power 32 33 2 18 Sensitive Power 32S 33 2 19 Power Factor 55 33 Section 3 CT Requirements 34 3 1 CT Requirements for Overcurrent and Earth Fault Protection 34 3 1 1 Ove...

Page 360: ...network 23 Figure 2 8 3 Earth fault current direction in compensated network 23 Figure 2 8 4 Adjustment of Characteristic Angle 23 Figure 2 8 5 Cosine component of current 24 Figure 2 8 6 Earth fault current in isolated network 25 Figure 2 9 1 Balanced and Restricted Earth fault protection of Transformers 26 Figure 2 9 2 Composite Overcurrent and Restricted Earth fault Protection 27 Figure 2 12 1 ...

Page 361: ...s Switchable earthing connections Loss of Grid connection see below Figure 1 5 1 Example Use of Alternative Settings Groups RADIAL SUBSTATION Start generators Select alternate settings group Local Generation Industrial system draws power from grid system during normal operation Relays normally use settings group 1 On loss of mains Local generation switched in Non essential loads tripped Relays on ...

Page 362: ...o a binary input to provide LED indication and also have a parallel connection wired to directly trip the circuit via a blocking diode see figure 1 2 1 RELAY BI n ve ve BI n ve ve BO n BO n BO n BO n Buchholz Gas Buchholz Surge Wdg Temp Alarm Wdg Temp Trip Oil Temp Alarm Oil Temp Trip BI n ve ve BI n ve ve BI n ve ve BI n ve ve TRIP CIRCUIT POWER TRANSFORMER Blocking Diodes Figure 1 2 2 Example of...

Page 363: ...gic within the device Example An AC oprated Binary input is required to inhibit the 50 1 protection element with 100ms minimum pickup delay and 200ms minimum drop off delay 1 Set Binary Input 1 for AC operation 2 Set quicklogic equation E1 to operate from Binary Input 1 and apply required delays 3 Set equation E1 to operate virtual I O V1 in the Output Matrix 4 Set virtual I O V1 to operate Inhibi...

Page 364: ...gory also gives immunity to capacitive discharge currents see 1 2 4 The Figure 1 2 3 show the external resistors which should be fitted to allow the binary input to comply with either of the above categories Fitting these components will raise the current required to operate the binary input and hence makes it less susceptible to maloperation Where required the minimum pickup delay for the binary ...

Page 365: ... 5V Operative IOP 50mA 1K2 330 BI Pickup DTL 15ms 10µF 60V Capacitance discharge BI Pickup DTL 15ms 10µF 150V Capacitance discharge BI 19V BI 19V BI 19V BI 19V BI 19V Resistor power ratings 30V DC Nominal 3W 48V DC Nominal 3W 110V DC Nominal 10W Low Burden 110V DC Nominal 20W High Burden Resistors must be wired with crimped connections as they may run hot 110V DC Nominal 87 5 137 5V Operative IOP ...

Page 366: ... to display such digital signals as trips a general pick up plant control signals etc Each LED can be defined as Self or Hand Reset Hand reset LEDs are used where the user is required to expressly acknowledge the change in status e g critical operations such as trips or system failures Self reset LEDs are used to display features which routinely change state such as Circuit Breaker open or close T...

Page 367: ...ecause their tripping times are inversely proportional to the Fault Current being measured This makes them particularly suitable to grading studies where it is important that only the Relay s closest to the fault operate Discrimination can be achieved with minimised operating times To optimise the grading capability of the relay additional time multiplier Follower DTL Fig 2 1 1 or Minimum Operate ...

Page 368: ...re important where the fault path to earth is a high resistance one such as in highly arid areas or where the system uses high values of earthing resistor reactance and the fault current detected in the phase conductors will be limited 2 1 1 Selection of Overcurrent Characteristics Each pole has two independent over current characteristics Where required the two curves can be used To produce a com...

Page 369: ...ain The same phenomenon has occurred in compound filled joint boxes or on clashing overhead line conductors The repeating occurrence of the fault can cause electromechanical disc relays to ratchet up and eventually trip the faulty circuit if the reset time of the relay is longer than the time between successive faults To mimic an electromechanical relay the relay can be user programmed for an IEC ...

Page 370: ... will have a declared minimum sustained fault current and this must be above the protection over current settings Close in short circuit faults may also cause the AVR to reach its safety limits for supplying maximum excitation boost in the order of several seconds and this will result in AVR internal protection devices such as diode fuses to start operating The generator excitation will then colla...

Page 371: ...hould be tripped for arc faults in the cable termination and CT compartment The whole busbar must be cleared for arc faults which cannot be identified as being on the line side of the circuit breaker Overcurrent supervision can only be applied if the arrangement ensures that current will be measured for all arc faults In Figure 2 4 1 Zone 2 can only be supervised by current if the feeders are radi...

Page 372: ...rrent Protection Schemes A combination of instantaneous and DTL elements can be used in blocked overcurrent protection schemes These protection schemes are applied to protect substation busbars or interconnectors etc Blocked overcurrent protection provides improved fault clearance times when compared against normally graded overcurrent relays The blocked overcurrent scheme of busbar protection sho...

Page 373: ... 1 element will ensure that the incomer is not tripped for outgoing circuit faults However to include for both equipment tolerances and a safety margin a minimum time delay of 100ms is recommended This type of scheme is very cost effective and provides a compromise between back up overcurrent busbar protection and dedicated schemes of busbar protection Instantaneous elements are also commonly appl...

Page 374: ...SEF relays may be graded with each other Where very sensitive current settings are required then it is preferable to use a core balance CT rather than wire into the residual connection of the line CTs The turns ratio of a core balance CT can be much smaller than that of phase conductors as they are not related to the rated current of the protected circuit Since only one core is used the CT magneti...

Page 375: ...ence and operate quantities which must be allowed for in the Characteristic Angle setting This is the expected fault angle sometimes termed the Maximum Torque Angle MTA as an analogy to older Electro mechanical type relays Example Expected fault angle is 30º Current lagging Voltage so set Directional Angle to 90 30 60 A fault is determined to be in the selected direction if its phase relationship ...

Page 376: ...r the network shown in fig 2 6 3 The Circuit breakers at A B E and G have directional overcurrent relays fitted since fault current can flow in both directions at these points The forward direction is defined as being away from the busbar and against the direction of normal load current flow These forward looking IDMTL elements can have sensitive settings applied i e low current and time multiplie...

Page 377: ... relays at C and D By using different settings for forward and reverse directions closed ring circuits can be set to grade correctly whether fault current flows in a clockwise or counter clockwise direction i e it may be practical to use only one relay to provide dual directional protection 2 7 1 2 Out of 3 Logic Sensitive settings can be used with directional overcurrent relays since they are dir...

Page 378: ...he ZPS derived earth fault current is still the operating quantity Care must be taken as the Characteristic Angle may require adjustment if NPS Polarising is used Once again the fault angle is completely predictable though this is a little more complicated as the method of earthing must be considered MTA I wrt V O0 150 900 650 450 Resistive Neutral Reactive Neutral VRES VRES IRES IRES IRES IRES IR...

Page 379: ...sed to detect the direction of the resistive component within the residual current Setting of the boundary is critical to discriminate between faulted and unfaulted circuits Setting 67SEF Compensated Network to Enabled will set the directional boundaries to 87º around the characteristic angle fine adjustment of the boundary may be necessary using the characteristic angle setting Faulted VRES Chara...

Page 380: ...ES IRES Cosθ IRES Sinθ θ Figure 2 8 5 Cosine component of current iii Application of a Wattmetric power characteristic The directional 50 51 SEF element operation is subject to an additional sensitive residual power element which operates only on the real wattmetric component of residual power ...

Page 381: ...nt in isolated network Some customers prefer to use only the sine reactive component of the residual current which can be easily achieved by setting Ires Select to Ires Real to select the operating current to IRESCos θ Ø and setting the characteristic angle Ø to 90º 2 8 3 Minimum Polarising Voltage The correct residual voltage direction must be measured to allow a forward reverse decision to be ma...

Page 382: ...e presence of the transformer Figure 2 9 1 Balanced and Restricted Earth fault protection of Transformers The calculation of the value of the Stability Resistor is based on the worst case where one CT fully saturates and the other balancing CT does not saturate at all A separate Siemens Protection Devices Limited Publication is available covering the calculation procedure for REF protection To sum...

Page 383: ...he charging current per phase High impedance differential protection is suitable for application to auto transformers as line currents are in phase and the secondary current through the relay is balanced to zero by the use of CTs ratios at all three terminals High impedance protection of this type is very sensitive and fast operating for internal faults 2 10 Negative Phase Sequence Overcurrent 46N...

Page 384: ...rent levels θ 0 for unheated equipment and θ 100 for maximum thermal withstand of equipment or the Trip threshold Figure 2 12 1 Thermal Overload Heating and Cooling Characteristic For given current level the Thermal State will ramp up over time until Thermal Equilibrium is reached when Heating Effects of Current Thermal Losses The heating cooling curve is primarily dependant upon the Thermal Time ...

Page 385: ...connection of motors To confirm presence loss of supply the voltage elements should be set to values safely above below that where a normal system voltage excursion can be expected The switchgear plant design should be considered The Dead level may be very near to the live level or may be significantly below it The variable hysteresis setting allows the relay to be used with all types of switchgea...

Page 386: ... to 3 times the normal phase earth voltage level If Neutral Overvoltage protection is used it must be suitably time graded with other protections in order to prevent unwanted tripping for external system earth faults OC EF Transformer Feeder Earth fault EHV HV HV MV HV CB Tripped by local protection MV CB tripped by 1 Feeder unit protection or 2 Intertrip from HV feeder protection or 3 NVD protect...

Page 387: ...rect phase sequence due to an incorrect connection 2 16 Under Over Frequency 81 During normal system operation the frequency will continuously vary over a relatively small range due to the changing generation load balance Excessive frequency variation may occur for Loss of generating capacity or loss of mains supply underfrequency If the governors and other regulating equipment cannot respond to c...

Page 388: ...requency setting but to have different length time delays set on each stage If after the first stage is shed the frequency doesn t recover then subsequent stages will shed after longer time delays have elapsed Generator Network Incomer G59 300 5 STAGE 1 Least important STAGE 2 STAGE 3 STAGE 4 Essential Load 6 1 2 5 5 3 4 2 4 Figure 2 16 1 Load Shedding Scheme Using Under Frequency Elements ...

Page 389: ...ppropriate operating quantity Power direction can also be used to recognise and record particular network operation arrangements such as back feeds or embedded generation conditions 2 18 Sensitive Power 32S The CT accuracy should be considered when setting this function for the application 2 19 Power Factor 55 Power factor limits can be set to provide alarms or even tripping for abnormal power fac...

Page 390: ...eeded magnitude accuracy is not important Often however there is also the need to consider instantaneous HighSet overcurrent protection as part of the same protection system and the settings would normally be of the order of 10x the CT rating or higher Where higher settings are to be used then the overcurrent factor must be raised accordingly e g to P20 3 1 2 Earth Fault Protection CTs Considerati...

Page 391: ...r of other relays which may or may not provide the ARC function the 7SR device can be configured to clear any transient faults quickly without regard to normal fault current grading because ARC will quickly restore the network back into service This is achieved by defining each protection element to be one of two types Delayed or Instantaneous Inst The ARC shots of the sequence are then each defin...

Page 392: ...ch off as ARC sequences They would therefore also step to their Delayed Trip to retain co ordination with the respective downstream devices The next Trip would be subject to current grading and Lockout the ARC sequence such that the fault is cleared by the correct CB 4 1 1 Auto Reclose Example 1 typical advanced distribution network sequence Requirement Settings shall provide four phase fault recl...

Page 393: ...or E F CONTROL LOGIC AUTORECLOSE CONFIG P F SHOTS 79 P F Prot n Trip 1 Inst not important as there are no Inst elements set 79 P F Prot n Trip 2 Delayed not important as there are no Inst elements set 79 P F Prot n Trip 3 Delayed not used as only 1 P F reclose is executed 79 P F HS Trips to Lockout 5 not used 79 P F Delayed Trips to Lockout 2 prevents a 2 nd P F reclose CONTROL LOGIC AUTORECLOSE C...

Page 394: ...N 1 79 P F HS Trips none 79 E F HS Trips none CONTROL LOGIC AUTORECLOSE CONFIG 79 Num Shots 1 CONTROL LOGIC AUTORECLOSE CONFIG P F SHOTS 79 P F Prot n Trip 1 Inst not important as there are no Inst elements set 79 P F Prot n Trip 2 Delayed not important as there are no Inst elements set 79 P F HS Trips to Lockout 5 not used 79 P F Delayed Trips to Lockout 5 not used CONTROL LOGIC AUTORECLOSE CONFI...

Page 395: ...ed Trips 51 1 CONTROL LOGIC AUTORECLOSE CONFIG P F SHOTS 79 P F Prot n Trip 1 Inst 79 P F Prot n Trip 2 Inst 79 P F Prot n Trip 3 Delayed 79 P F Prot n Trip 4 Delayed The above settings are suitable at values of fault current above I2 however were a fault to occur with a current value between I1 and I2 this would be detected by the 51 1 element only As Prot n Trip 1 Inst then the relay would trip ...

Page 396: ...er 1 confirms that a trip has been issued to CB1 e g Binary Output 2 that CB 1 has opened e g Binary Input 1 and that no current flows in the circuit e g 37 1 Virtual 1 Incomer 1 Relay is Configured CB1 Open auxiliary switch wired to BI 1 Trip output to CB1 BO 2 OUTPUT CONFIG OUTPUT MATRIX 37 1 V1 OUTPUT CONFIG OUTPUT MATRIX E1 BO3 CONTROL LOGIC QUICK LOGIC E1 O2 I1 V1 The output from Incomer 1 Bi...

Page 397: ... On other systems however this output will be used to re trip the local CB to minimise potential disruption to the system if possible via a secondary trip coil and wiring The second CB Failure stage will then be used to back trip the adjacent CB s If the CB is faulty and unable to open a faulty contact can be wired to the CB faulty input of the relay and if a trip occurs while this input is raised...

Page 398: ... for each stage of the circuit breaker fail function is as below CB Backtrip Sucessful 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 System Fault ms from fault occuring Relay Operation and CBF Timer Started Main Trip Relay Operation Failure of CB to trip Reset of CBF elements does not occur Backtrip Operation Backtrip Trip Relay CB Operate Time Stage 1 CBF Timer Backtrip 120ms Fi...

Page 399: ...being independent units that this condition is not tested for Current Transformer Supervision 60CTS 7SR12 When a CT fails the current levels seen by the protection become unbalanced A large level of NPS current is therefore detected around 0 3 x In for one or two CT failures However this condition would also occur for a system fault To differentiate between the two conditions the element uses NPS ...

Page 400: ...quantities to meet some older specifications There are possible problems with using NPS quantities due to load imbalances These would also generate significant levels of NPS current and so possibly cause a VT failure to be missed This problem can be overcome by careful selection of settings however setting the NPS current threshold above the level expected for imbalance conditions If a failure occ...

Page 401: ...breaker is operating the input is given a 0 4s Drop off Delay in the INPUT CONFIG BINARY INPUT CONFIG menu To provide an alarm output a normally open binary output is mapped to 74TCS n or 74CCS n 5 4 1 Trip Circuit Supervision Connections The following circuits are derived from UK ENA S15 standard schemes H5 H6 and H7 For compliance with this standard Where more than one device is used to trip the...

Page 402: ...rvision of trip coil with the circuit breaker Open or Closed It does not provide pre closing supervision of the connections and links between the tripping contacts and the circuit breaker and may not therefore be suitable for some circuits which include an isolating link Scheme 3 Comprehensive BI ve ve BO BI ve ve TRIP COIL 52a 52b Circuit Breaker TRIP CCT n FAIL BO 1 BO n Remote Alarm R R H7 Sche...

Page 403: ...ex However a ratio of 20 2 nd Harmonic to Fundamental current will meet most applications without compromising the integrity of the Overcurrent protection There are 3 methods of detection and blocking during the passage of magnetising inrush current Phase Blocking only occurs in those phases where Inrush is detected Large Single Phase Transformers Auto transformers Cross All 3 phases are blocked i...

Page 404: ...termined from a system study or measured during commissioning making sure it is measured during maximum system load conditions to ensure all single phase loads are included Operation is subject to a time delay to prevent operation for transitory effects a minimum delay of 50sec may be recommended 5 6 1 Broken Conductor example Information recorded during commissioning I full load 500A I NPS 50A Th...

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