Siemens 7SG16 Ohmega 402-60 Manual Download Page 26

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7SG164 Ohmega 400 Series Impedance Functions

The replica impedance

has magnitude

cos

(

−

)

and angle

−

°.

The relay is set using parameters for the line impedance, resistive reach and characteristic angle as
shown below:

Chapter 2 Page 12 of 21

Summary of Contents for 7SG16 Ohmega 402-60

Page 1: ...Reyrolle Protection Devices 7SG16 Ohmega 402 60 Protection Relays Answers for energy ...

Page 2: ...e 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 2010 Siemens Protection De...

Page 3: ... shall any 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 ...

Page 4: ...5 Watts 4 6 6 VArs 4 6 7 Power Factor 4 6 8 Load Direction 4 7 Data Storage 5 7 1 Fault Records 5 7 2 Waveform Records 5 7 3 Event Records 5 8 Communications 6 9 Self Monitoring 7 10 Password Feature 7 11 User Interface 7 11 1 General Arrangement 7 11 2 Liquid Crystal Display 7 11 3 LED Indications 8 11 4 Keypad 8 12 Settings and Displays 8 13 Relay Hardware 10 13 1 Internal Construction 11 13 2 F...

Page 5: ...ures are detailed in Section 12 of this manual 3 Output Contacts The basic relay model provides 5 output relays three of which energise changeover contacts the remaining two energise normally open contacts The number of output contacts can be increased by groups of 8 to give a maximum of 29 output contacts Outputs are user programmable to operate from any or all of the protection functions In addi...

Page 6: ...ed When the input is de energised the relay returns to the original settings group All Settings are stored in non volatile memory 6 Instrumentation And Metering 6 1 Metering The metering features provide continuous data accessed either from the relay fascia in Instruments Display Mode or via the data communications interface While in the display mode pressing the Ø key accesses the following meter...

Page 7: ...ecent record When each record is viewed the LED s which were indicating at the time of the fault are re displayed The relay triggers the fault recorder and waveform storage when the internal logic detects a fault trip condition Fault records are stored in capacitor backed memory 7 2 Waveform Records The waveform record feature stores analogue and digital information for all current inputs voltage ...

Page 8: ...mined once they have been downloaded into a suitable data analysis package such as Reydisp Evolution or by interrogation of the SCADA system 8 Communications A front mounted RS232 port and two rear fibre optic communication ports are provided Communication is compatible with the IEC60870 5 103 transmission and application standards The fibre optic interface gives superior EMC performance A user fr...

Page 9: ...thorised personnel and the password can be retrieved The relay is supplied with the password set to NONE which means the feature is de activated To de activate the password change the password to NONE the function will now be disabled 11 User Interface The user interface is designed to provide a user friendly method of entering settings and retrieving data from the relay The HMI is shown in 1 11 1...

Page 10: ...ng alarm Phase C Power Swing trip Earth Broken Conductor Carrier Receive 1 Stub Protection Aided Trip Autoreclose in progress DEF Forward Autoreclose lockout DEF Reverse CB open Table 3 Typical LED Indications 11 4 Keypad Five push buttons are used to control the functions of the relay by moving around the menu display They are labelled Ø Ö ENTER and CANCEL Note that the Ö button is also labelled ...

Page 11: ...ONS MENU Ö TO VIEW FAULT LOCATOR MENU Ö TO VIEW NOTE THE ARROWS IN THE DIAGRAM REPRESENT THE KEY PRESSES REQUIRED TO NAVIGATE THE MENU SYSTEM READ UP READ DOWN TEST RESET ENTE R CANCE L PRIMARY VOLTAGE PRIMARY CURRENT SECONDARY VOLTAGE SECONDARY CURRENT SECONDARY RES CURRENT SECONDARY NPS CURRENT SECONDARY ZPS CURRENT SECONDARY ZPS VOLTAGE POWER FLOW DIRECTION TOTAL REACTIVE POWER POWER FACTOR PRI...

Page 12: ... display The setting selections setting ranges and default values can be found at the end of each relevant section in the technical manual 13 Relay Hardware The range of relays are housed in the Epsilon case size 16 The relay hardware is illustrated in 1 The build consists of up to eight internal hardware modules as well as the fascia module All relay models are supplied with the following modules...

Page 13: ...ted interference 13 2 Front Cover After the relay has been commissioned a clear plastic front cover is fitted This allows the user to see the entire front of the relay but only allows access to the Ø and Ö buttons allowing all of the menus discussed previously to be viewed but not changed The only action which is permitted is to reset the Fault Data Display latched output relays and the latched LE...

Page 14: ...ces Limited Chapter 1 Page 12 of 12 Figure 1 Human Machine Interface HMI Features 1 Relay type 2 2 line 20 character back lit L C display 3 Alarm description 4 Protection healthy L E D 5 Local RS232 port 6 Five button key pad 7 32 programmable alarm and trip L E D s 5 1 2 3 4 6 7 ...

Page 15: ...hall any 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 20...

Page 16: ......

Page 17: ... Pole Three Pole Tripping 406 408 Only 14 1 6 Power Swing Characteristics 15 1 6 1 Applications 15 1 6 2 Description of Operation 16 1 6 3 Settings 16 1 7 Voltage Transformer Supervision VTS 17 1 7 1 Applications 17 1 7 2 Description of Operation 17 1 7 3 General Operation 17 1 7 4 Settings 18 1 8 Switch On To Fault SOTF 19 1 8 1 Applications 19 1 8 2 Description of Operation 19 1 8 3 Settings 20 ...

Page 18: ...s will have no effect For unbalanced faults however this cross polarising changes the overall shape of the characteristic into a circle of diameter ZF kZ S as shown in figure 1 when the current is flowing in the forward direction It can be seen from this diagram that the reach along the line angle is unaffected but off angle the characteristic expands This expansion gives an increasing coverage of...

Page 19: ...he relaying point of In addition to this the origin is not a boundary condition as it is for zones 1 and 2 so the offset zone can be used in schemes to provide positive operation for marginal conditions see Switch onto fault logic 1 1 3 Fault Configuration A distance relay must measure the impedance correctly for all types of power system faults single phase two phase and three phase For each faul...

Page 20: ...cular phases As can be seen from figure 4 this leads to a loop impedance of 2ZL 1 1 3 2 Earth faults When considering earth faults the relay is actually presented with a loop impedance of ZL ZN where ZL is the impedance in the line to the fault and ZN is the earth return path as shown in figure 5 This can also be compensated for by using a combination of the current flowing in the line and neutral...

Page 21: ...any convenient dimensions e g Primary Ohms Secondary Ohms Ohms Km etc provided the zero phase sequence value and the positive phase sequence value are expressed in the same units When the reach setting Z1 the ratio Z0 Z1 the line angle and the angle of Z0 are entered the relay calculates the composite value K0 1 3 Z0 Z1 1 and this value is taken into account for a polarised mho characteristic usin...

Page 22: ...or 2 the characteristic is narrower near the origin allowing for a more 1 1 4 1 Setting of Shape Factors The positions of the blinders are set using the shape factor 1 SF1 and shape factor 2 SF2 settings which appear in the distance protection setting menu as part of the zone 3 settings Each of these settings has a range from 0 00 to 1 00 in 0 01 steps Normally both shape factors would be set to t...

Page 23: ...dth calculated from the shape factors These values ratios are given below for reference Ratio of minor to major axis a b THR maximum lobe width as ratio 0 36 0 38 0 5 0 52 0 6 0 62 0 75 0 752 Selecting different link positions on THR resulted in unequal lobe widths giving an asymmetrical characteristic This could be advantageous for some applications and this effect can be achieved by selecting un...

Page 24: ...ource during unbalanced faults ensuring operation for close up forward faults and stability for close up reverse faults A self polarised directional characteristic is given by the vector equation IZ F V Dividing through by I gives Z F Z In other words we compare the angle of the fault impedance with the angle of the forward replica impedance as shown below If the two angles are within 90 then the ...

Page 25: ...ue the comparator operates The angle ΦX is normally set at about 3 to the horizontal so that the characteristic slopes in order to ensure that with increasing resistance the relay will not overreach beyond setting This angle is referred to as the reactive drop angle The vector equation for the reactance characteristic is IZF V IZF which becomes ZF Z ZF If the angle between ZF and ZF Z is less than...

Page 26: ... The replica impedance ZF has magnitude RF cos ΦL 90 and angle Φ L 90 The relay is set using parameters for the line impedance resistive reach and characteristic angle as shown below 2010 Siemens Protection Devices Limited Chapter 2 Page 12 of 21 ...

Page 27: ...ristic is shown below This is constructed using forward and reverse resistance characteristics and forward and reverse reactance characteristics This would be used for the offset zone 3 characteristic Figure 13 Typical offset quadrilateral distance characteristic 2010 Siemens Protection Devices Limited Chapter 2 Page 13 of 21 ...

Page 28: ...oking polarised characteristic It is commonly used as a non tripping zone in conjunction with a blocking scheme The accuracy of the relay is 5 or 0 1Ω whichever is larger The range for each of the impedance elements is from 0 1Ω to 250Ω regardless of the output of the current transformers Obviously the settings used for 5A CTs will be smaller than those used for 1A CTs on an equivalent circuit Wit...

Page 29: ...In order to prevent from maltripping a power swing blocking function may be implemented There are various methods detecting power swings encroaching impedance measuring elements The most common practice is to plot an impedance curve which encloses tripping impedance characteristics Ohmega employs two independent shapes of characteristics for this purpose i e polygonal and circular It is possible t...

Page 30: ...this is a possible problem 1 6 2 2 Power Swing Blocking Once a power swing has been detected it is often desirable to prevent operation of the relay during a power swing condition The relay can be set to block operation of any combination of protection zones within the relay Faults can occur during power oscillations so it is necessary to provide a mean of distinguishing between a power swing and ...

Page 31: ...t occurs during the voltage transformer failure there will be no zero sequence current Thus if a phase fault occurs during a VT failure the zero sequence undercurrent detector will not reset itself and the relay will remain blocked For this reason there are two settings for the VTS mode VTS MODE ALARM ONLY ALARM AND INHIBIT VTS PHASE FAULT INHIBIT ENABLED DISABLED With the relay in ALARM ONLY mode...

Page 32: ...d current VTS ALARM contacts can be selected from the OUTPUT MENU In the case of loss of all three phases of the VT a contact should be taken from the VT MCB and connected to the VT CCTS ISOLATED Status Input of the relay This will energise the Status Input when the VT MCB trips 1 7 4 Settings VT Supervision Disable Enable VTS Mode Alarm Only Alarm Inhibit VTS Latched Operation Disable Enable VTS ...

Page 33: ...et by default to 10 000ms so the breaker must have been open for at least ten seconds before the SOTF logic is initiated Once the logic has been initiated the relay can cause a SOTF trip in one of two ways Firstly after this time delay if the voltage on one or more phases increases above 20 of the nominal voltage the ACSOTFTIMER will reset after a fixed time delay of 200ms This gives a fixed 200ms...

Page 34: ...F Dead Time default 10secs This assures that the SOTF is not in operation during recloses during an auto reclose sequence and only during manual closing operations 1 8 3 Settings The settings menu for the SOTF function is contained in the AUX PROTECTION Menu and contains the following settings Switch On To Fault Disable Enable SOTF Mode AC SOTF DC SOTF SOTF O C Operate Level 0 3 4 0 3xIn AC SOTF P...

Page 35: ...ed For example a 20km line may have a secondary impedance of 15 ohms This would give a unit value of 0 75 ohms per kilometre using these values the fault locator would accurately measure the fault position The fault locator if enabled will measure for any general trip condition While the fault is being calculated the relay fascia function keys are disabled for a few seconds 2 1 3 Relay Settings Fa...

Page 36: ... 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 2010 Siemens Pro...

Page 37: ...f Load Some models only 4 1 3 Reach Extension Some models only 5 2 Schemes Incorporating a Signalling Channel 7 2 1 Permissive Underreach 7 2 2 Permissive Overreach Zone 1 POR1 9 2 3 Permissive Overreach Zone 2 POR2 10 2 4 Blocked Overreach 13 2010 Siemens Protection Devices Limited Chapter 3 Page 2 of 13 ...

Page 38: ...fset characteristic to provide a further level of back up protection The Zone 3 time delay is set to be longer than the Zone 2 time delay The disadvantage of such a scheme is that faults in the last 20 of the line are cleared after the Zone 2 time delay This may be acceptable for lower voltage distribution systems but for important circuits or higher voltage systems additional schemes are availabl...

Page 39: ...of Load Level with the current on the remaining phases above this level it will remove the time delay from zone 2 for a fixed time delay the LOL Time Limit to allow the relay to trip instantaneously This will allow the relay to trip more quickly for single or double phase faults but will not affect operation for three phase faults A short time delay typically 20ms known as the Loss of Load Pole Sc...

Page 40: ...ransient in nature this will allow transient faults to be cleared more quickly S Stn 1 S Stn 2 Relay B Relay A Relay A Zone 1 X Relay A Zone 1 Relay A Zone 2 Relay A Zone 3 Zone 1 reach used for first trip Zone 1 reach used after reclosing The disadvantage of this scheme is that since the extended Zone 1 reach is an overreaching Zone it may operate for faults in the next line section However when ...

Page 41: ...ion ENABLED Zone 1 X PF Impedance Reach Zone 1 X PF Resistance Reach Zone 1 X EF Impedance Reach Zone 1 X EF Resistance Reach These are the settings used by the relay for the first trip Status Inputs BLOCK REACH EXT Relay Outputs N A 2010 Siemens Protection Devices Limited Chapter 3 Page 6 of 13 ...

Page 42: ...Stn 2 Relay A Zone 2 Relay B Relay A Zone 1 Relay A Zone 3 Relay B Zone 2 Relay B Zone 1 Relay B Zone 3 Relay A Carrier Aided Trip Relay B Carrier Aided Trip Relay A Zone 2 AND Relay B Zone 1 Relay A Zone 2 AND Relay B Zone 1 Relay A The relay is arranged to send a signal when its Zone 1 picks up The relay will trip instantaneously for a Zone 1 fault If a signal is received from the remote end the...

Page 43: ...7SG16 Ohmega 402 60 Protection Schemes Relay Outputs AIDED TRIP 2010 Siemens Protection Devices Limited Chapter 3 Page 8 of 13 ...

Page 44: ... diagram below Where the signalling equipment has an output which indicates that the signalling channel is out of service this can be connected to a Status Input called Carrier Recv Guard On energisation of this status input the relay will revert to a time stepped distance scheme Since this scheme does not provide any instantaneous protection zone it is rarely used POR 2 provides a similar but mor...

Page 45: ...may be useful on short lines Note that when using POR 2 two signalling channels must be available one in each direction since the Zone 2 elements which initiate the signal send will both operate for a fault on the line section Where the signalling equipment has an output which indicates that the signalling channel is out of service this can be connected to a Status Input called Carrier Recv Guard ...

Page 46: ... A opens But the signal receive may remain high at end C due to the propagation delay in the signalling channel The Zone 2 element of relay C will then pick up for the fault at F when CB A opens There is then a race condition at relay C between the drop off of the signal receive from Relay D and the pick up of Relay C Zone 2 element IF the signal receive element is still present in conjunction wit...

Page 47: ...d trip POR2 ED rip se Width 250ms tatus Inputs L RECEIVE 1 RD Relay Ou TRIP 1 1 2 3 5 Settings Distance Scheme POR Weak Infeed DISABL POR Weak Infeed T DISABLED WI Voltage Level 5 85v 54v POR CB Echo Pul 0 60000ms POR Current Rev Reset 0 60000ms 200ms WI Sig Recv PU Delay 0 60000 0ms SS Pickup 0 60000 0ms SS Dropoff 0 60000 1ms SR Dropoff 0 60000 1ms S SIGNA CARRIER RECV GUA tputs AIDED SIGNAL SEN...

Page 48: ...ignal is received the Zone 2 time delay will remain in place and the relay will carry out a Zone 2 trip after the Zone 2 Time delay If the fault is in the last section of the line i e outside the Zone 1 reach the Zone 2 element will operate but the remote end relay Zone 4 element not see the fault Thus no blocking signal will be sent and the relay will carry out a Carrier Aided Trip after the Perm...

Page 49: ...ument 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 2013 Siemens Protection Devices Limited 7SG1641 Ohmega ...

Page 50: ...gs Walkthrough 8 2 1 System Config Menu 9 2 2 Distance Protection Menu 10 2 3 Power Swing Menu 12 2 4 Aux Protection Menu 13 2 5 Reylogic Config 14 2 6 Status Config 15 2 7 Output Config 16 2 8 Output Relay Dwell Time Menu 17 2 9 LED Configuration Menu 17 2 10 Data Storage Menu 18 2 11 Communications Menu 18 2 12 Fault Locator Menu 19 ...

Page 51: ... Deg 75 Deg POR Weak Infeed Enabled Disabled Enabled WI Local Trip Enabled Disabled Enabled WI Voltage Level 5 5 5 85 v 54 0 v Z1 Phase Fault Enabled Disabled Enabled Z1 PF Impedance 0 5 0 51 10 0 10 1 10 2 100 101 250 8 00 Ohm Z1 PF Time Delay 0 10 10000ms 0ms Z1 Earth Fault Enabled Disabled Enabled Z1 EF Impedance 0 5 0 51 10 0 10 1 10 2 100 101 250 8 00 Ohm Z1 EF Time Delay 0 10 10000ms 0ms Z2 ...

Page 52: ... PSD Zone blocking Zone 1 Zone 2 Zone 3 Zone 4 Zone2 4 PSD Shape CIRCULAR RECTANGULAR CIRCULAR PSD Blinders ENABLE DISABLE DISABLE PSD Inner Fwd Impedance 0 1 0 2 250 0 24 0 Ohm PSD Inner Rev Impedance 0 1 0 2 250 0 8 0 Ohm PSD Inner Fwd Blinder 0 1 0 2 250 0 16 0 Ohm PSD Inner Rev Blinder 0 1 0 2 250 0 16 0 Ohm PSD Outer Multiplier 1 05 1 06 2 00 1 50x PSD Transit Time 0 5 1000ms 50ms Auxiliary P...

Page 53: ...nal Receive 1 NONE 1 27 7 Carrier Recv Guard NONE 1 27 NONE DC SOTF Manual Close NONE 1 27 NONE VT Ccts Isolated NONE 1 27 8 3 Ph V Chk Enable NONE 1 27 9 Block Mode Inhibit NONE 1 27 6 Trigger Storage NONE 1 27 NONE Inhibit Outputs NONE 1 27 NONE Input 1 NONE 1 27 NONE Input 2 NONE 1 27 NONE Input 3 NONE 1 27 NONE Input 4 NONE 1 27 NONE Input 5 NONE 1 27 NONE Input 6 NONE 1 27 NONE Input 7 NONE 1...

Page 54: ...00ms 100ms Min Op Time 7 1 10 2000ms 100ms Min Op Time 8 1 10 2000ms 100ms Min Op Time 9 1 10 2000ms 100ms Min Op Time 10 1 10 2000ms 100ms Min Op Time 12 1 10 2000ms 100ms Min Op Time 13 1 10 2000ms 100ms Min Op Time 14 1 10 2000ms 100ms Min Op Time 15 1 10 2000ms 100ms Min Op Time 16 1 10 2000ms 100ms Min Op Time 17 1 10 2000ms 100ms Min Op Time 18 1 10 2000ms 100ms Min Op Time 19 1 10 2000ms 10...

Page 55: ...lf Reset LEDs NONE 1 29 4 10 18 24 Data Storage Menu Setting Range Default Pre trigger Storage 10 90 20 Record Duration 10x1s 5x2s 2x5s 1x10s 10 x 1 sec Communications Menu Setting Range Default Station Address 0 1 254 0 IEC870 on port COM1 COM2 COM1 COM1 Baud Rate 75 110 300 600 1200 2400 4800 9600 19200 38400 57600 115200 19200 COM1 Parity Even Odd None EVEN COM1 Line Idle Light On Light Off LIG...

Page 56: ...The starting point is the relay identifier screen This is the screen the relay displays when it is first powered up and can be reached from any display by pressing CANCEL a few times From this position press the down arrow key once the relay will display SETTINGS MODE From this display the down arrow key can be pressed again to enter the setting list or the right arrow key can be pressed to choose...

Page 57: ...l revert to the previous active setting group when the Use Alt Setting Grp Status Input is de energised View Edit Group 1 8 1 This is the settings group which is currently being displayed by the relay This is the group which would be changed if any setting is edited This is not necessarily the same group as those currently in use Default Screens Timer Off 1 60 mins 60 This is the time delay after ...

Page 58: ... enabled or disabled from this setting WI Voltage Level 5 85volts 54v This is the voltage level at which the POR Weak Infeed detector registers a voltage depression which is characteristic of a weak infeed situation Z1 Phase Fault Disabled Enabled Enabled Operation of the Zone 1 phase fault elements A B B C C A can be enabled or disabled from this setting Z1 PF Impedance 0 1 250 8 ohms Defines the...

Page 59: ...F Time Delay 0 10000 2000 ms An independent time delay from 0 10s can be applied to the Zone 3 phase fault protection elements Z3 Earth Fault Disabled Enabled Enabled Operation of the Zone 3 earth fault elements A E B E C E can be enabled or disabled from this setting Z3 EF Type Fwd Mho Offset Quad Offset Mho There are three types of Zone 3 characteristic for earth faults Forward Fwd Mho Reverse R...

Page 60: ...event load encroachment These are applied parallel to the line angle when enabled PSD Inner Fwd Impedance 0 1 250 24 ohms Sets the inner impedance reach in the forward direction on the line angle for the PSD characteristic This is usually set equal to or greater than the Zone 3 reach PSD Inner Rev Impedance 0 1 250 8 ohms Sets the inner impedance reach in the reverse direction on the line angle fo...

Page 61: ...s for the security of the VT circuit It can be enabled or disabled VTS Latched Operation DISABLED ENABLED ENABLED If latched operation is enabled and a VTS operation remains on the system for more than the VTS Latch PU Delay the VTS alarm and inhibit will not reset when current is detected above the setting If this is disabled the VTS will always reset when current is detected above the VTS settin...

Page 62: ...eversal when a Permissive Overreach is in use POR CB Echo Pulse 0 60000 1 ms This is the duration for which the signal send is activated when a Signal Receive input is energised when the circuit breaker is open when the POR scheme is in use SS Dropoff 0 60000 1 ms The Distance send signal can be delayed using this timer to provide a variable pulse length Permissive Trip Time 0 60000 1 ms This is u...

Page 63: ...Signalling channel used for Distance Protection Carrier Recv Guard 39 Character String NONE Where it is available a signal may be taken from the signalling equipment which will energised this status input when the signalling channel is faulty This will cause the selected scheme to act as a time stepped distance scheme until the SI is de energised DC SOTF Manual Close 39 Character String NONE This ...

Page 64: ...contact if there is any failure then this contact will close giving a fail safe alarm condition Zone 1 39 Character String NONE Zone 2 39 Character String NONE Zone 3 39 Character String NONE Zone 4 39 Character String NONE Indicates the Zones involved in the fault Note these outputs are not starters they will have the same time delayed operation as the zones themselves Zone 1 Start 39 Character S...

Page 65: ...er a permissive signal or a blocking signal to the remote end Signal Received 1 39 Character String NONE Operates on receipt of a signal from the remote end distance relay Signal Received 2 39 Character String NONE Not Used Carrier Failed 39 Character String NONE Operates when the carrier guard SI has operated because of a faulty signalling channel Input 1 7 Operated 39 Character String NONE Each ...

Page 66: ...tic port Defines whether the fibre optic light will be ON or OFF when the line is idle COM1 Data Echo Off On This setting must be switched on to enable the relay to pass data around a ring system If a number of relays are connected together the data echo feature must be switched on to allow data transfer When communicating with a single relay it may be easier to switch this setting to OFF COM2 Bau...

Page 67: ...ence impedance of 100 of the line Sec y Z per unit distance 0 1 250 0 500 Defines the secondary positive sequence impedance per mile or kilometre Display distance as Percent Kilometres Miles Defines whether the distance is displayed as a distance or as a percentage of the Pos Seq Line Impedance setting Fault Locator Enabled Disabled Allows the fault locator to be enabled or disabled ...

Page 68: ... COMMUNICATIONS MENU TO VIEW FAULT LOCATOR MENU TO VIEW NOTE THE ARROWS IN THE DIAGRAM REPRESENT THE KEY PRESSES REQUIRED TO NAVIGATE THE MENU SYSTEM READ UP READ DOWN TEST RESET ENTER CANCEL PRIMARY VOLTAGE PRIMARY CURRENT PRIMARY AUX VOLTAGE PRIMARY AUX CURRENT SECONDARY AUX VOLTAGE STATUS INPUTS STATUS INPUTS OUTPUT RELAYS OUTPUT RELAYS NUM WAVEFORM RECORDS TIME DATE 402 60 OUTPUT CONFIG MENU T...

Page 69: ...r shall any 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...

Page 70: ...lt Locator 5 4 Indication 5 5 Output contacts 5 6 Status inputs 5 7 Optional Features 6 7 1 Directional Earth Fault Setting Range 6 8 Performance Specification 6 8 1 Accuracy General 6 8 2 Accuracy Influencing Factors 6 8 3 Distance Function Reach 7 8 4 Departure from Reference Angle 7 8 5 Transient overreach 7 8 6 Departure from reference setting 8 8 7 Departure from reference frequency 8 8 8 Dep...

Page 71: ...ngs Distance relays usually quote the boundary of performance in terms of SIR System Impedance Ratio plotted against the accuracy of the relay This is a powerful method of describing the relays performance Adjustment of the positive sequence zone impedance is made by the menu selection Each zone has the same setting range Rating Zone Range 1A 0 1 250 Ohm 2A 0 1 125 Ohm 5A 0 1 50 Ohm Any zone is se...

Page 72: ...h fault 2 12 Zone 3 elements Zone three has three phase fault phase fault elements and three earth fault elements The characteristic shapes available for both phase and earth fault are Circular polarised MHO forward Circular polarised MHO reverse Circular offset MHO Phase fault characteristics have the additional feature to allow for load encroachment and can be shaped An option of quadrilateral c...

Page 73: ...n from the waveform record associated with the fault to determine both the fault type and the line impedance between the relay and the fault location ignoring any fault resistance This information is then displayed as part of the relay fault record By default the location is displayed as a percentage of the positive sequence line impedance This can be set in the range 0 1 250 ohms in magnitude and...

Page 74: ...roughout the performance specification accuracy statements are made at reference conditions These reference conditions are as follows Reference Conditions General IEC60255 Parts 6 6A 16 Auxiliary Supply Nominal Frequency 50 or 60Hz Characteristic Line Angle 75 Ambient Temperature 20 C Zone 1 impedance 6 0 Ohms Zone 2 impedance 6 0 Ohms Zone 3 impedance 6 0 Ohms Zone 4 impedance 6 0 Ohms Neutral im...

Page 75: ...ference angle depends upon the characteristic shape In general terms the impedance setting Z at any angle Φ can be expressed in terms of the nominal setting ZN at the reference angle ΦN as follows Φ f Z Z N Where is the equation defining the characteristic Using this method the variation in characteristic shape can be simply specified in terms of class accuracy and the deviation from the reference...

Page 76: ...5 of operating current Overcurrent Time OCT 1 or 10ms whichever is greater 8 10 Forward and Reverse Directional Earth Fault Functions Operating Current 5 of setting Reset Current 95 of operating current Definite Time Lag 1 DEF DTL Timers DEFF DEFR 1 or 5ms whichever is greater 8 11 Power Swing PS Impedance Variation Setting Range Characteristic or Impedance Variation 5 error 8 12 Timing Figures 1 ...

Page 77: ...c 20A ac or dc for 0 2 sec 30A ac or dc Break limit 5A or 300 volts ac resistive 1250VA ac inductive 250VA PF 0 4 dc resistive 75W dc inductive 30W L R 40 ms 50W L R 10 ms Minimum number of operations 1000 at maximum load Minimum recommended load 0 5W limits 10mA or 5V 10 Auxiliary energizing quantity DC Power Supply Nominal Operating Range VAUX 30 34V 24V to 37 5V dc VAUX 50 110 125V 37 5V to 137...

Page 78: ...ge of a 10µF capacitor charged to maximum DC auxiliary supply voltage Typical response time 25ms Typical Drop off time 25ms Typical response time when programmed to energise an output relay contact 30ms 11 Environmental Withstand Temperature IEC 6068 2 1 2 Operating range 10 C to 55 C Storage range 25 C to 70 C Humidity IEC 6068 2 3 Operational test 56 days at 40 C and 95 RH Transient Overvoltage ...

Page 79: ...V 5 50ns 2 5kHz repetitive 3 Vibration Sinusoidal IEC 60255 21 1 Class 1 Variation Vibration response 0 5gn 5 Vibration endurance 1 0gn 5 Shock and Bump IEC 60255 21 2 Class 1 Variation Shock response 5 gn 11ms 5 Shock withstand 15 gn 11ms 5 Bump test 10 gn 16ms 5 Seismic IEC 60255 21 3 Class 1 Variation Seismic Response 1gn 5 Mechanical Classification Durability In excess of 106 operations ...

Page 80: ...0 50 60 70 80 90 100 Fault Position Operating time ms SIR 0 1 SIR 1 0 SIR 10 SIR 30 Figure 1 Ohmega 400 Series operating time Phase to Phase Faults 0 5 10 15 20 25 30 35 40 45 50 0 10 20 30 40 50 60 70 80 90 100 Fault Position Operating time ms SIR 0 1 SIR 1 0 SIR 10 SIR 30 Figure 2 2011 Siemens Protection Devices Limited Chapter 5 Page 12 of 13 ...

Page 81: ...pter 5 Page 13 of 13 Ohmega 400 Series operating time Three Phase Faults 0 5 10 15 20 25 30 35 40 0 10 20 30 40 50 60 70 80 90 100 Fault Position Operating time ms SIR 0 1 SIR 1 0 SIR 10 SIR 30 Figure 3 Accuracy 0 0 2 0 4 0 6 0 8 1 0 1 1 10 100 1000 SIR Fault Position Mho Characteristic Figure 4 ...

Page 82: ... shall any 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 ...

Page 83: ...nection Specification And Relay Settings 4 2 1 Recommended cable 4 2 2 Connection Method 4 2 3 Transmission Method 4 2 4 Transmission Rate 4 2 5 Line Idle Setting 4 2 6 Parity Setting 4 2 7 Address Setting 4 2 8 Modems 4 2011 Siemens Protection Devices Limited Chapter 6 Page 2 of 5 ...

Page 84: ... Port 2B The same port can be accessed instead through an RS232 connector mounted on the relay fascia Port 2A This provides facilities for access to the relay from a lap top or PC used for commissioning or interrogating relays on site See the Installation section of this manual for further information The following text gives details of connecting the IEC 60870 5 103 Complaint Informative Communic...

Page 85: ...ual RS232 Port or Sigma 1 Passive Fibre Optic Hub The Sigma 3 Dual RS232 port provides a Fibre Optic interface to a relay and 2 RS232 Ports The RS232 system port is typically connected to a control system Both this and the Fibre Optic port would usually be hidden from view inside a panel The second RS232 port is local port When it is in use the system port is automatically disabled The Dual port d...

Page 86: ... 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 2 parameters to be set The auto answer setting should be switched on and the number of rings after which it will answer The Data Terminal Ready DTR settings should be forced on This te...

Page 87: ... any 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 2011 S...

Page 88: ...quired For The Setting Calculations 4 3 2 Distance Protection Settings 4 3 2 1 Overall Settings 4 3 2 2 Residual Compensation Settings 4 3 2 3 Zone 1 Impedance Setting 5 3 2 4 Zone 2 Impedance Setting 5 3 2 5 Zone 3 Impedance Setting 6 3 2 6 Zone 4 Impedance Setting 7 APPENDIX A Status Inputs 8 2011 Siemens Protection Devices Limited Chapter 7 Page 2 of 8 ...

Page 89: ...to IEC 46 6 ie BS3938 class x The CT s should have a knee point voltage Vk as follows Vk K Ip 1 Xp 0 03 Rct RI N Rp Vk K Ie 1 Xe 0 06 Rct RI N Re Where Ip Primary phase fault current calculated for Xp Rp ratio at the end of zone 1 Ie Primary earth fault current calculated for Xe ratio at the end of zone 1 N C T ratio Xp Rp power system resistance to reactance ratio for the total plant including th...

Page 90: ...first settings in the menu are common for all zones The relay will use a time stepped scheme by default All relay schemes are detailed in Section 3 of this manual 3 2 1 Overall Settings The first settings made in the distance protection menu apply to all zones of protection The CT secondary is set as set as 1A 2A or 5A depending on the CT rating The line angle is the angle of the positive sequence...

Page 91: ... setting is determined as follows Zone 1 Setting V C L1 where L1 required Zone 1 reach in primary positive sequence ohms C protection current transformer ratio V protection voltage transformer ratio The available setting ranges are 1 amp relay 0 1 250 ohms 2 amp relay 0 1 125 ohms 5 amp relay 0 1 50 ohms The minimum recommended settings are 1 amp relay 0 1ohms 2 amp relay 0 2ohms 5 amp relay 0 5oh...

Page 92: ...mally set to give a grading margin between the zones and ensure that fault clearance times are achieved On lines with tee off transformers the transformers can supply zero sequence current if they are earthed on the line side This is equivalent to an infeed as indicated in and should be considered when choosing the Zone 3 setting Care should be taken to grade the Zone 3 setting with the rest of th...

Page 93: ...le The Zone 4 impedance element can be used to directly trip the relay or it can be used with the scheme logic to provide reverse looking fault detection for protection blocking schemes The Zone 4 resistance setting for earth fault quad characteristics is set to give an adequate resistive cover to allow for tower footing resistance and arc resistance This setting is required in secondary ohms 2011...

Page 94: ...t breaker i e trip or close and the external wiring route takes it outside the panel on which the relay is mounted into the electrically onerous area of a substation and the initiation circuit is not double pole switched it is recommended that an ESI 48 4 1 compliant version is used Should the user require any status input to meet the requirements of ESI 48 4 1 for ac rejection and capacitive disc...

Page 95: ... any 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 2011 S...

Page 96: ...king Storage and Handling 3 2 Recommended Mounting Position 3 3 Relay Dimensions 3 4 Fixings 3 4 1 Crimps 3 4 2 Panel Fixing Screws 3 4 3 Communications 4 5 Ancillary Equipment 4 6 Precautions 4 2011 Siemens Protection Devices Limited Chapter 8 Page 2 of 4 ...

Page 97: ...ure that he is at the same potential as the relay by touching the case The module must not be handled by any of the module terminals on the rear of the chassis Modules must be packed for transport in an anti static container Ensure that anyone else handling the modules is at the same potential As there are no user serviceable parts in any module there should be no requirement to remove any compone...

Page 98: ...e of running Microsoft Windows Ver 3 1 or greater and it must have a standard RS232 port A standard data cable is required to connect from the PC to the 25 pin female D type connector on the front of the relay For remote communications more specialised equipment is required See the section on Communications for further information and also see Report No 690 0 01 on Relay Communications 6 Precautio...

Page 99: ...r 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 2010 Siemens Prote...

Page 100: ...2 Switch Onto Fault Feature 10 4 2 1 AC SOTF 10 4 2 2 DC SOTF Status Input control 10 4 3 Voltage Transformer Supervision VTS Tests 11 4 3 1 Residual Voltage and Current detector 11 4 3 2 VTS blocking function 12 4 4 Power Swing Detector Tests 13 4 4 1 Power Swing Impedance Reach 13 4 4 2 Power swing transit timer 14 4 4 3 Power swing blocking function 14 5 AUXILIARY PROTECTION TESTS 15 5 1 Fault ...

Page 101: ...relay you should be familiar with the relay s menu system Section 1 and Section 4 of the Technical Manual The relay settings for the particular application should be applied before any secondary testing occurs If they are not available then the relay has default settings which can be used for pre commissioning tests See section 2 for a list of the relay default settings Settings can be entered int...

Page 102: ... is energised a 0 indicates that it is not Where practical operate the initiate condition of the status input or failing this connect the relevant D C voltage to the status input terminals to energise them Nominal Voltage Operating Range 30 34 18V to 37 5V 48 54 37 5V to 60V 110 125 87 5V to 137 5V 220 250 175V to 280V INPUT CHECKED NOTES 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23...

Page 103: ...t relay selected will be energised Check with a continuity tester that the actual contacts have operated De select the output relay and check that the contact returns Consult the schematic diagram or Relay Connections Diagram in the Technical Manual for terminal numbers Output Relay Type Relay 1 3 Change Over Relay 4 Normally Open OUTPUT CHECKED NOTES 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1...

Page 104: ...elay is displayed in the Instrument Menu with 5 accuracy The applied A C volts can be in the range of 5 220Vrms Nominal voltage of 63 5V or 110V is recommended OK Checked 3 2 Current Measurement Apply A C current to each current input circuit of the relay using a variable current source The relay should display the correct value of current the value measured by the relay is displayed in the Instru...

Page 105: ...1 0 If the test set incorporates automatic earth fault compensation ensure that this is configured correctly on the test set Alternatively if the test set has no automatic earth fault compensation then see Appendix A for details of how to measure the fault loop impedance Record the impedance reach of each earth fault element in all zones in the table below Element Relay Setting Ω Fault Type Measur...

Page 106: ...red correctly on the test set Alternatively if the test set has no automatic fault loop compensation then see Appendix A for details of how to measure the fault loop impedance Element Relay Phase Fault Setting Fault Type Measured Impedance Ω Error A B B C Zone 1 C A A B B C Zone 2 C A A B B C Zone 3 C A A B B C Zone 3 Reverse C A Ensure that the error does not exceed 5 or 0 15 Ω whichever is large...

Page 107: ...each of the zones of protection on the line angle Check and record Zone 1 2 3 operating times for faults in the middle of reach zones Element Time Delay Settings Fault Type Applied Impedance Ω Measured Operating Time ms A E B E Earth Fault ms C E A B B C Zone 1 Phase Fault ms C A A E B E Earth Fault ms C E A B B C Zone 2 Phase Fault ms C A A E B E Earth Fault ms C E A B B C Zone 3 Phase Fault ms C...

Page 108: ...ide zone 1 but inside zone3 Repeat this test with the pre fault time set to 250ms Zone Fault Type Pre fault time ms Relay Indication 150 SOTF 250 Distance Trip 4 2 1 3 AC Line Check pick up time The line must have been dead for a set time delay before the AC line check function is enabled Using the test kit in a sequence mode arrange the following sequence of states Setting of AC SOTF Pickup Delay...

Page 109: ...and Current detector Apply nominal voltage level on three phases and ramp down one of them until a VTS indication appears Next gradually increase the current on the same phase until the VTS indication drops off Record these values in the Measured pick up level column in the table below VTS Ires Level A VTS Vres Level V Calc volts pick up Vn VTS Vres Level V Calc Curr Pick up In VTS Ires Level A Ph...

Page 110: ...er the VTS blocking function is disabled the protection should trip with the corresponding indication VTS Mode VTS alarm only TRIP VTS Mode VTS alarm and inhibit NO TRIP To prove the VTS blocking feature for phase faults set up the following sequence using the test set STATE 1 1 Second STATE 2 1 Second STATE 3 1 Second Nominal Current Voltage on all three phases Zero Volts on 2 phases Nominal PS C...

Page 111: ... Fwd Reach Ω Inner Zone Rev Reach Ω Element Measured Impedance Error Inner Zone Forward Reach Inner Zone Forward Reach Ensure that the percentage error does not exceed 5 The outer reach of the Power Swing Detector zone is set by a multiplying factor The actual outer reach is the inner reach multiplied by the PSD Outer multiplier PSD Outer multiplier Outer Zone Fwd Reach Ω Outer Zone Rev Reach Ω Ap...

Page 112: ...he operating time for the PSD element Set Transit Time ms Measured Time ms Calculated PSD Operation Time ms 4 4 3 Power swing blocking function In the table below tick the zones of protection that are blocked when a power swing occurs and those which are not blocked Using the State sequencer set up two states STATE 1 System impedance between the inner and outer zones of the Power Swing Detector ST...

Page 113: ... than 5 in each case OK Checked 5 2 High Set Overcurrent HSOC ENABLED DISABLED The high set overcurrent element will pick up independently of the distance protection elements when it detects a current above it s setting Using the test set simulate a fault in zone with fault current lower than the HSOC setting Repeat this gradually increasing the fault current until the HSOC detector picks up Recor...

Page 114: ...erating time of the element SP Level x In A SP Delay Ms Calculated Pick up A Measured Pick up A Operating Time ms Relay Indication Trip Stub Protection 5 4 Zone 2 Override Zone 2 Override ENABLED DISABLED Ensure the Zone 2 Override Status Input is de energised Apply a Zone 2 Fault to the relay and measure the trip time Energise the Zone 2 Override Status Input and repeat the fault Record the fault...

Page 115: ...s follows 6 1 Distance Scheme Tests Ensure that the signal received 1 output is mapped to an LED With the signalling channel in service initiate a zone 1 fault and check that the permissive signal is received at the remote end This is indicated by operation of the assigned LED on the remote end relay Checked OK Next manually energise the signal send 1 signalling channel from the remote end Simulat...

Page 116: ...rmulae V IZ1 1 KN Where Z1 is the positive sequence impedance i e the relay setting Zone 1 Phase Effective Impedance Total Loop Impedance Current Injected Phase Angle Voltage Injected Phase Angle A B C Zone 2 Phase Effective Impedance Total Loop Impedance Current Injected Phase Angle Voltage Injected Phase Angle A B C Zone 3 Fwd Phase Effective Impedance Total Loop Impedance Current Injected Phase...

Page 117: ...positive sequence impedance i e the relay setting Zone 1 Phase Effective Impedance Total Loop Impedance Current Injected Phase Angle Voltage Injected Phase Angle A B C Zone 2 Phase Effective Impedance Total Loop Impedance Current Injected Phase Angle Voltage Injected Phase Angle A B C Zone 3 Fwd Phase Effective Impedance Total Loop Impedance Current Injected Phase Angle Voltage Injected Phase Angl...

Page 118: ...l any 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 2011 ...

Page 119: ...red Test Equipment 3 2 Inspection 3 3 Applying Settings 3 4 Precautions 3 5 Tests 3 5 1 Insulation 3 5 2 Secondary Injection 4 5 3 Primary Injection 4 5 4 Load Checks 5 5 5 Tripping Tests 5 6 Putting Into Service 6 2011 Siemens Protection Devices Limited Chapter 9 Page 2 of 6 ...

Page 120: ...gs The relay feature eight alternative settings groups In applications where more than one settings group is to be used then it may be necessary to test the relay in more than one configuration When using settings groups it is important to remember that the relay need not necessarily be operating according to the settings which are currently being displayed There is an active settings group on whi...

Page 121: ...e are no user serviceable components in the withdrawable modules faulty relays must be returned to Siemens Using the automatic test equipment inject 1 amp 3 phase into the current circuits of the relay and apply 63 5 volts 3 phase to the voltage circuits Check that the fascia display indicates the correct corresponding primary currents and voltages applicable to the relevant instrument transformer...

Page 122: ...e transformer supply 5 4 Load Checks Directional Check Check that the arrangement of supply links and fuses are arranged as follows Trip links removed Voltage transformer fuses and links inserted Current transformers connected for normal operation Earth links inserted For this test a three phase load current is required Select the fascia display to INSTRUMENT MODE Scroll in this mode until the pow...

Page 123: ...s per scheme is obtained i e either single pole tripping or three pole tripping with the associated control operations 6 Putting Into Service Remove the external test connections and heavy duty test plugs Check that the current and voltage transformer are wired for normal operation Check that all a c and d c supply links and fuses are inserted Check that the earth links are inserted Check that all...

Page 124: ... any 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 2011 S...

Page 125: ...7SG164 Ohmega 400 Series Maintenance Contents 1 Maintenance Instructions 3 2 Trouble Shooting Guide 4 3 Defect Report Form 6 2011 Siemens Protection Devices Limited Chapter 10 Page 2 of 6 ...

Page 126: ...e checked for operation during the normal maintenance period for the site on which the product is installed It is recommended the following tests are carried out 1 Visual inspection of the metering display every year 2 Operation of output contacts every 2 years 3 Secondary injection of each element every 5 years 2011 Siemens Protection Devices Limited Chapter 10 Page 3 of 6 ...

Page 127: ...7 5 to 137 5 V Relay LCD displays PSU alarm asserted supply out of limits Internal ribbon cable connection not made Check ribbon connection cable to module A is correctly attached Protection Healthy LED blinking Messages cursor blocks flashing across the LCD screen Internal ribbon connections not made correctly Check ribbon connection cables to each module are correctly attached Relay displays Num...

Page 128: ...hin ReyDisp Evolution If the relay address is set to 0 the relay will not communicate Ensure the baud rate parity settings on the PC are the same as those set on the relay Relay unable to communicate using Reydisp Evolution software Communication channel incorrectly configured Refer to Section 6 of this manual for more details on the configuration of the Communication Channel If using the front po...

Page 129: ...load Sporadic failure Knock sensitive Transport damage Permanent failure Temperature caused failure Failure after ca hrs in use Repeated breakdown Failure after firmware update Error description Display message use separated sheet for more info Active LED messages Faulty Interface s which Wrong measured value s which Faulty input s output s which Detailed error description please refer to other er...

Page 130: ...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 2011 Siemens Protection Devices...

Page 131: ...ts 1 Relay Connections 3 2 Overall dimensions and panel drilling for Epsilon E16 4 3 Reylogic Diagrams 5 4 Distance Protection 6 5 Auxilary Functions 9 6 Protection Schemes 13 2011 Siemens Protection Devices Limited Chapter 11 Page 2 of 18 ...

Page 132: ...7SG1641 Ohmega 402 60 Diagrams 1 Relay Connections 2011 Siemens Protection Devices Limited Chapter 11 Page 3 of 18 ...

Page 133: ...7SG1641 Ohmega 402 60 Diagrams 2 Overall dimensions and panel drilling for Epsilon E16 2011 Siemens Protection Devices Limited Chapter 11 Page 4 of 18 ...

Page 134: ...diagrams show the logic used in the relay This is split up into three sections firstly the logic used for the distance protection function then the auxiliary function logic then finally the scheme logic 2011 Siemens Protection Devices Limited Chapter 11 Page 5 of 18 ...

Page 135: ...shall the highset operations for output flagging primary trip operation Marshall the stub protection operations for output flagging backup trip operation Marshall the primary trip sources Marshall the backup trip sources In addition to TRIP3PHASE these will also generate the DARLockout BACKUPTRIP signal Generate a general Zone 1 output for alarmand flagging Generate zone starter signals fromthe in...

Page 136: ...nals for use by the distance module output latches first the latch enable When a heavy three phase fault occurs the fault voltage will collapse and the voltage memory will start timing out After approx 100ms the memory output will clamp off and the memory timeout signal will go active This applies an inhibit to zone 1 and where fitted zone 4 The latch operation is required to prevent dropoff of th...

Page 137: ..._SWING VTSEFI VTSPFI Z4PFIH Z4EFIH PSD_BLOCKZONE4 1 1 PSD_SWING DEL_VMEM_TIMEOUT DEL_VMEM_TIMEOUT Allow Zone 1 to be inhibited by Power Swing VTS or Voltage Memory timing out Allow Zone 2 to be inhibited by the same Power Swing VTS or Vmemtimed out Zone 3 has no memory voltage so only inhibit fromPower Swing and VTS Zone 4 does have memory voltage so inhibit fromall ie Power Swing VTS or Vmemtimed...

Page 138: ...y Hiset logic for Ohmega 400 series 2615S881235 Ken Nickerson HISET HSOCC HSOCA HSOCB Copy the protection output booleans to local bools for speed safety HSOPA HSOPB HSOPC HSOPC HSOPA HSOPB 1 Generate an alarmoutput for the hiset This is also used later as a 3 pole trip 2011 Siemens Protection Devices Limited Chapter 11 Page 9 of 18 ...

Page 139: ...ACSOTFUVA SOTF_OC_A PhaseADead SOTF_OC_B PhaseBDead ACSOTFUVC SOTF_OC_C PhaseCDead PhaseADead PhaseBDead PhaseCDead Now use this to evaluate the SOTFlogic PhaseADeadTimer 1 200 PhaseBDeadTimer 1 200 PhaseCDeadTimer 1 200 Generate a pulse fromthe manual close input DC_SOTF_PULSE DC_SOTF_PULSE TRIG_DC_SOTF TRIG_DC_SOTF AUXDCSOTFDEADTIME 10000 100 STARTAUXDCSOTF 1 STARTAUXDCSOTFis qualified with a mi...

Page 140: ...eset fromthe voltage recovery VTS3PLOV LOST3PVOLTS Perform3 pole loss of voltage check gives alarmout only VTSUC VTSOV 1 ALL_ISOLATED VTS_LATCH VTSLatchTimer 5000 1 VTSLatch S R Q RESET_VTS_LATCH VTSA VTSPFMODE VTSMODE VTSEFI VTSPFI VTSResetDelay 0 20 1 VTSAlarmDelay 100 20 Now the actual VTS logic VTS_ACTIVE VTS_ACTIVE VTS_LATCH VTSLATCHENABLE 2011 Siemens Protection Devices Limited Chapter 11 Pa...

Page 141: ...ction logic for Ohmega 400 series 2615S81246 Ken Nickerson STUBPROTECTION STUBC STUBA STUBB Generate an alarm flag output for stub operation STUBOPA STUBOPB STUBOPC STUBOUT STUBPROTECTION STUBPROTECTION STUBPROTECTION Qualify the stub outputs for flagging 2011 Siemens Protection Devices Limited Chapter 11 Page 12 of 18 ...

Page 142: ... or the unstabilising input which is either a manual operation or comes froman external protection relay giving us an intertrip UNSTABILISE Finally we generate our aided trip signal fromsignal receive 1 qualified by the lack of a carrier fail signal stretch the SIGRECV1 CARRIERFAIL resultant output and use it to qualify the instantaneous zone 2 output FALSE Z1XEF Z1XPF Clear the reach extension co...

Page 143: ...ent reversal guard CRG prevents this by blocking operation of the local end for a selected period after dropoff of the reverse fault if we have seen Zone4 and signal recv and our breaker is closed We also create a CB Closed matrix tag here Weak Infeed Logic Under certain systemconditions such as on radial systems or where the source capacity at one end of a line is reduced for some reason then the...

Page 144: ...SIGRECV1 PORCBEchoReqd Z1G PORAntiPingPongTimer 1 1000 1 PORECHOPulseGen PORCBEchoReqd PORECHOPulseGen POREchoPulse POREchoPulse PORCBEchoPulseWidth 1 250 POREcho This is the echo pulse monostable This stretches the single period pulse generated above into one of user specified width default 250ms 1 SIGSEND1 SSEXTEND 1 1 1 Sig Send Logic We generate a signal to send to the remote relay if we have ...

Page 145: ...nt reversal guard CRG prevents this by blocking operation of the local end for a selected period after dropoff of the reverse fault if we have seen Zone4 and signal recv and our breaker is closed We also create a CB Closed matrix tag here Weak Infeed Logic Under certain systemconditions such as on radial systems or where the source capacity at one end of a line is reduced for some reason then ther...

Page 146: ...SIGRECV1 PORCBEchoReqd Z1G PORAntiPingPongTimer 1 1000 1 PORECHOPulseGen PORCBEchoReqd PORECHOPulseGen POREchoPulse POREchoPulse PORCBEchoPulseWidth 1 250 POREcho This is the echo pulse monostable This stretches the single period pulse generated above into one of user specified width default 250ms 1 SIGSEND1 SSEXTEND 1 1 1 Sig Send Logic We generate a signal to send to the remote relay if we have ...

Page 147: ...f zone reverse faults Now we generate the aided trip signal which is delayed to allow time for blocking and is blocked if signal receive is active 1 Also we add the external unstabilise control Manual external trip into the equation to allow it to work with the scheme Also we need an inhibit signal to prevent blocking under certain circumstances and to incorporate the carrier fail signal UNSTABILI...

Page 148: ...ll any 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 2011...

Page 149: ...7SG164 Ohmega 400 Series Stub Protection Contents 1 Stub Protection 3 2 Settings 3 2011 Siemens Protection Devices Limited Chapter 12 Page 2 of 4 ...

Page 150: ... is illuminated displaying stub protection trip or alarm Data storage can only be initiated from a trip condition The current elements are instantaneous transient free elements which have an independent DTL timer The output can be set to 0s for instantaneous operation or time delayed up to 1000 ms To switch on the stub protection function it has to be enabled in the AUXILLIARY PROTECTION MENU If t...

Page 151: ...7SG164 Ohmega 400 Series Stub Protection 2011 Siemens Protection Devices Limited Chapter 12 Page 4 of 4 21 Un protected Zone Figure 2 ...

Page 152: ...49 180 524 84 37 Fax 49 180 524 24 71 Charges depending on provider E mail support energy siemens com Power Distribution Division Order No C53000 G7076 C28 2 Printed in Fürth Printed on elementary chlorine free bleached paper All rights reserved Trademarks mentioned in this document are the property of Siemens AG its affili ates or their respective owners Subject to change without prior notice The...

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