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Manual MRIK3-C EN

Woodward

DOK-TD-MRIK3-C Rev. A

8.4

Tripping

characteristics

8.4.1

Inverse time overcurrent protection relay

Tripping characteristics according to IEC 255-4 or BS 142

Normal inverse (Typ A)

 



















Very inverse (Typ B)

 



















Extremely inverse (Typ C)

 













Long time inverse

 

120

















RI-inverse

 

236

339



















RXIDG – characteristic

 





































Where:

tripping time

time multiplier

fault

current

Setting range of the current



= natural

logarithm

8.4.2

Determination of earth fault direction (MRIK3-ER/XR)

Measurement of active current
in component for compensated systems:

x cos



Measurement of reactive current
component for isolated systems:

x sin



Angle measuring accuracy:



3° at I

x cos



or I

x sin



>5% I

Residual voltage sensitivity:

<0.2% U

at I = 0.1 x I

Summary of Contents for MRIK3-C

Page 1: ...MRIK3 C Digital time overcurrent relay with Control function and auto reclosing Manual MRIK3 C RevisionA ...

Page 2: ... reserves the right to update any portion of this publication at any time Information provided by Woodward Governor Company is believed to be correct and reliable However no responsibility is as sumed by Woodward Governor Company unless otherwise expressly undertaken Woodward ...

Page 3: ... AR ready 19 5 3 4 AR starting dead time 19 5 3 5 AR cycle auto reclosing 19 5 3 6 AR blocked 19 5 3 7 Fast Trip Mode 19 5 3 8 Blocking mode 19 5 3 9 Activating of AR 19 5 3 10 Description of the status transition 20 5 3 11 AR information inputs 20 5 4 Functional sequence 21 5 4 1 Switching on MRIK3 C 21 5 4 2 Circuit breaker manual closing 21 5 4 3 Circuit breaker manual open 21 5 4 4 Starting AR...

Page 4: ...Phase Overcurrent Element 42 6 5 4 Fast Time tripping by switch ON of the CB for the overcurrent element 43 6 5 5 Reset Mode for the Trip Characteristics in Phase Current Path 43 6 5 6 Current setting for high set element 43 6 5 7 Trip Block for all protection elements 43 6 5 8 Trip delay for high set element 43 6 5 9 Fast Time tripping by switch ON of the CB for the short circuit element 44 6 5 1...

Page 5: ...7 4 Example of test circuit for MRIK3 C relays without directional feature 66 7 4 1 Checking the input circuits and measured values 66 7 4 2 Checking the operating and resetting values of the relay 67 7 4 3 Checking the relay operating time 67 7 4 4 Checking the high set element of the relay 67 7 4 5 Test circuit for MRIK3 relay with earth current directional recognition ER XR models 68 7 4 6 Chec...

Page 6: ...Woodward Manual MRIK3 C EN 6 DOK TD MRIK3 C Rev A 9 Order form 82 ...

Page 7: ...mation and descriptions this manual includes Text graphic and formulae do not always apply to the actual delivery scope The drawings and graphics are not true to scale We do not accept any liability for damage and operational failures caused by operating errors or disregarding the directions of this manual No part of this manual is allowed to be reproduced or passed on to others in any form unless...

Page 8: ...onal injury 1 3 How to use this instruction In this instruction the technical description of all MRIK3 C versions is included The user is given a comprehensive insight into the various applications the selection installation setting of parame ters and putting into operation of the MRIK3 C The manual MR Digital multifunction relay describes the common part of the MRIK3 C relay functionality e g how...

Page 9: ...rays away from the control the modules and the work area as much as possible 4 Do not remove any printed circuit board PCB from the control cabinet unless absolutely necessary If you must remove the PCB from the control cabinet follow these precautions Do not touch any part of the PCB except the edges Do not touch the electrical conductors the connectors or the components with conductive devices o...

Page 10: ... Type A Very inverse Type B Extremely inverse Type C Special purpose characteristics eg RINV LINV and RXIDG in earth path Reset mode for DMT IMT trip characteristics is selectable Definite element for short circuit high speed trip Defined time overcurrent protection without directional feature DEFT Inverse time overcurrent protection without directional feature INV Two element defined or inverse t...

Page 11: ...Manual MRIK3 C EN Woodward DOK TD MRIK3 C Rev A 11 4 Design 4 1 Connections Figure 4 1 Connection diagram MRIK3 ICE Figure 4 2 Connection diagram MRIK3 ICER ICXR ...

Page 12: ...re three phase CTs are available and a combination of phase and earth current measuring is required Figure 4 4 Measuring of earth current with core type CT IE With the combination of phase and earth current measuring CTs to be connected according to Figure 4 3 or Figure 4 4 P1 P2 S1 S2 P1 P2 S1 S2 P1 P2 S1 S2 I1 I2 I3 IE L1 1 B3 B4 L1 2 L2 1 B5 L2 2 B6 L3 1 B7 L3 2 B8 B1 B2 L1 L2 L3 ...

Page 13: ...ese relays with two change over contacts and three re lays with one change over contact each are used for signalling The protective functions can be freely allocated except of those for the self supervision relay Relay 1 C1 D1 E1 and C2 D2 E2 Relay 2 C3 D3 E3 and C4 D4 E4 Relay 3 C5 D5 E5 Relay 4 C6 D6 E6 Relay 5 Self supervision C7 D7 E7 All relays are operating according to the n o principle wit...

Page 14: ...h a wide range power supply unit and hence the supply voltage is freely selectable The switching threshold of the digital inputs however has to be fixed in compli ance with the supply voltage Two different switching thresholds can be adjusted Range Plug UAB UAN Low Plugged in 8V 10V High Open 60V 80V Figure 4 5 Code jumpers ...

Page 15: ...word it is allowed to change the mode of the relay from remote control to local control and also allowed to control the CB See Chap 5 7 8 The procedure for password programming is described in Chapter 4 4 of the description MR digital multifunction re lays Figure 4 6 Code jumpers Code jumper Function Code jumper position Operation mode J1 Password 1 OFF Normal position general ON Password selectio...

Page 16: ...ent Date and time I2 t Indication for the composite switch off power of the CB No operation cycle counter FR Parameter for the fault recorder RS Setting of the relay address 4 3 2 Adjusting LEDs I Overcurrent setting I Short circuit setting IE Earth overcurrent setting IE Earth short circuit setting CHAR Selection of characteristics t emits in combination with all time delay settings DI Assignment...

Page 17: ...and time green forward direction red reverse direction IP Indication of the active component of the earth fault current IQ Indication of the reactive component of the earth fault current FR Parameter for the fault recorder RS Setting of the relay address 4 4 2 Adjusting LEDs I Overcurrent setting I Short circuit setting IE Earth overcurrent setting IE Earth short circuit setting CHAR Selection of ...

Page 18: ...nsformation DFFT Discrete Fast Fourier Transformation is applied to suppress high frequency harmonics and DC components caused by fault induced transients or other system disturbances The calculated actual current values are compared with the relay settings If a phase current ex ceeds the pickup value an alarm is given and after the set trip delay has elapsed the correspond ing trip relay is activ...

Page 19: ...ingly 5 3 6 AR blocked Unit MRIK3 C changes immediately to AR blocked status when an external or internal blocking signal A2 A3 exists activation via assigned digital input see Chap 6 12 4 No auto reclosing is possible in AR blocked status 5 3 7 Fast Trip Mode By way of the function Assignment of the AR functions it is possible to activate or deactivate a Fast Trip function for each AR stage and f...

Page 20: ... 4 3 only two status transitions are possible status transition to ready status when the auto reclosing takes place status transition to blocked status by external or internal blocking The grey shaded sections indicate that no transition is possible 5 3 11 AR information inputs By means of the information inputs the MRIK3 C decides whether and when automatic reclosing may take place The functions ...

Page 21: ...locked during this pe riod from 1 s to 300 s adjustable This is indicated at the unit by LED tR After expiration of the reclaim time the unit changes to ready status and is then ready for auto reclosing LED CB signalizes this status In case unit MRIK3 C is in blocked status before auxiliary voltage failure occurred this condition remains also after recurrence of auxiliary voltage The LED CB shows ...

Page 22: ...eclosing command is given to the circuit breaker The reclosing condi tions are the responsibility of the synchronisation command if the function is configured via the digi tal inputs The CB must be ready and in switched off status The reclosing command remains ei ther as long as the ON signal from the circuit breaker appears or the close impuls timer tCL has expired The LED tCL lights up for the d...

Page 23: ...nal AR block input is activated The LED 0 I is alight When the reclosing shot is set to EXIT the MRIK3 can also be blocked at site see chapter 6 12 4 5 4 10 Time sequence diagrams of MRIK3 C Legend 5 4 11 The unit is programmed for two shots successful AR at the second shot Figure 5 1 Two shots second AR successful In case of a short circuit an energizing follows with subsequent tripping of the pr...

Page 24: ...ker to faulty lines Figure 5 3 Manual closing of the C B to faulty lines Unit MRIK3 C is in inactive status when the circuit breaker is switched off When the C B is manually closed the reclaim time is started In case there is a faulty line the C B is switched off by mains protection of the relay After elapse of the reclaim time unit MRIK3 C changes over to inac tive status Short circuit Protection...

Page 25: ...Manual MRIK3 C EN Woodward DOK TD MRIK3 C Rev A 25 5 4 14 Unsuccessful AR Figure 5 4 Unsuccessful AR The sequence diagram illustrates the various possibilities of an unsuccessful AR ...

Page 26: ...nsformers supplying the relay Earth faults beyond the current transformers i e on the consumer or line side will not be detected Figure 5 5 Generator stator earth fault protection 5 5 2 System earth fault protection With the generator neutral point earthed as shown in Figure 5 6 the MRIK3 C picks up only to earth faults in the power system connected to the generator It does not pick up to earth fa...

Page 27: ...ning earth fault direction can be measured in three dif ferent ways depending on the voltage transformer connections refer to Table 5 2 Total current can be measured by connecting the unit either to a ring core C T or to current trans formers in a Holmgreen circuit However maximum sensitivity is achieved if the MRIK3 C protec tive device is connected to a ring core C T See Figure 4 4 The pick up v...

Page 28: ... line the capacity current IC b lags behind the residual voltage at 90 2 Compensated mains setting earthing COS MTA fixed 180 Figure 5 8 Phase position between the residual voltage and zero sequence current for faulted and non faulted lines in case of compensated systems cos UE residual voltage IE zero sequence current IL inductive component of zero sequence current caused by Petersen coil IC capa...

Page 29: ...anged as described in Chapter 4 4 of the of the description MR general and via the jumper J2 During local operation all remote operation via digital inputs or serial interface are blocked To change from local to remote or back are only possible from the front plate of the relay 5 7 3 Operating assignment of C B control In case of local operation remote mode via the digital inputs or via the serial...

Page 30: ...ment again The display will show MRIK The digital input functions t0 Ext tripping immediately t1 Ext tripping delayed ON Ext start t2 Trip restore Function are released Switching on and off via the serial interface are also released 5 7 7 Switching on or off the C B via the front panel LCAL After having selected the function LCAL pressing the SELECT RESET key will take you to the control mode The ...

Page 31: ...ow charts the detail handling is shown Control modus activation Display MRIK Key Enter Key AND Mode Controlling Mode indication LCAL RMOT LCAL RMOT OR Change Mode Remote operation CB control only via serial interface or digital inputs Display RMOT RMOT Select Key Password 2 already set Enter Key SAV Enter Key PSW Password 2 SAV Enter Key No Password OK Yes NO LCAL Yes Display LCAL Select Key Press...

Page 32: ...n LED CB flash green LED CB emits red Output relay CB OFF CB position OFF Supervision LED CB flash red LED CB emits green YES Display shows ON The CB LED emit green Display shows OFF The CB LED emits red Select Key End of control mode Indication CB position Detection of CB position CB position evaluation CB Error NO Indication CB Digital input function have to be set correctly or the auxiliary swi...

Page 33: ...g switching 0 0 Flashed red CB 0 1 Emits red OFF OFF 1 0 Emits green ON ON 1 1 Emits red OFF OFF CB position LED CB Display indication CB Ready CBOFF During switching 0 0 Emits red OFF OFF 0 1 Flashed red CB 1 0 Emits red OFF OFF 1 1 Emits green ON ON CB position LED CB Display indication CB ON CB OFF During switching 0 0 Flashed red CB 0 1 Emits green ON ON 1 0 Emits red OFF OFF 1 1 Flashed red C...

Page 34: ...ed 1 0 0 Flashed red 1 0 1 Emits green 1 1 0 Emits red 1 1 1 Flashed red CB position CB LED CB Ready CB ON 0 0 Emits green 0 1 Emits red 1 0 Emits green 1 1 Emits red CB position CB LED CB Ready CBOFF 0 0 Emits red 0 1 Emits green 1 0 Emits red 1 1 Emits green CB position CB LED CB ON CB OFF 0 0 Flashed red 0 1 Emits green 1 0 Emits red 1 1 Flashed red CB position CB LED CB Ready 0 Flashed red 1 F...

Page 35: ...d CB position Before switch ON After switch OFF CB Ready LED CB CB ON CB OFF LED CB 0 Flashed red x 0 Flashed red x 1 Emits green 1 Emits green x 0 Flashed red x 1 Emits green CB position Before switch ON After switch OFF CB Ready LED CB CB ON CB OFF LED CB x Emits green 0 0 Flashed red 0 1 Emits green 1 0 Flashed red 1 1 Flashed red CB position Before switch ON After switch OFF CB Ready LED CB CB...

Page 36: ...ensure precise operation of the protection unit even under full short circuit current the chosen transformers must not saturate in this current range This means that the overload factor must be sufficiently large Class For the nominal range or the lower load range it has to be taken into account that not only the basic accuracy of the MRIK3 C has to be considered but also the transformer accuracy ...

Page 37: ...R t tI CHAR I tRST Chap 6 5 5 Reset mode for earth current 0s 60s I CHAR t I tRST Chap 6 5 16 Warning or Trip at earth fault measuring TRIP WARN IE Chap 6 5 12 Measured method of the resid ual voltage UE 1 E N 1 1 Chap 6 4 3 changeover of isolated sin or compensated cos net works SIN COS IE IE Chap 6 5 20 CB failure CB CB blinking Chap 5 4 7 Auto reclosing successful Auto reclosing unsuccessful CL...

Page 38: ...f the blocked protection stage Chap 6 12 1 Relay assignment z B _ 2 _ _ LED of the blocked protection stage Chap 6 12 2 Trip signal for the fault recorder P_UP A_PI TRIP TEST FR Chap 6 10 3 Number of fault events S 2 S 4 S 8 FR Chap 6 10 2 Indication of date and time Y 01 M 01 D 04 h 12 m 2 s 12 Chap 6 11 Slave address of the serial inter face 1 32 RS Chap 6 8 1 Baud Rate 1200 9600 RS Chap 6 8 2 P...

Page 39: ...RIK3 C EN Woodward DOK TD MRIK3 C Rev A 39 6 3 Parameter levels The different levels are entered by press the following key or combination of keys Figure 6 1 Parameter levels For all levels password 1 is valid ...

Page 40: ...y rated CT current The settings for phase and earth current transformers can be done separately 6 4 2 Display of residual voltage UE as primary quantity Uprim Usec The residual voltage can be shown as primary measuring value For this parameter the transforma tion ratio of the VT has to be set accordingly If the parameter is set to SEK the measuring value is shown as rated secondary voltage Example...

Page 41: ...y The max possible value is 655 35 kAs 6 4 6 Rated Frequency The FFT Algorithm used for the data acquisition needs the set point of the rated frequency i e 50 Hz or 60 Hz for correct digital filtering of the earth current 6 4 7 Indication of pickup If the momentary current drops below the pickup threshold e g I after the relay was activated and there was no tripping then the activation is signalle...

Page 42: ...K3 C The LED for adjustment of the tripping time or time factor starts to flash after the trip characteristics have changed By this warning signal the operator is reminded to adjust the tripping time or time factor to the changed operational mode or trip time characteristics This warning signal keeps flash ing until the tripping time or time factor are re adjusted If re adjustment has not been don...

Page 43: ...he fault current has returned again 6 5 6 Current setting for high set element The current setting value of this parameter appearing on the display is related to the rated current of the relay This means I displayed value x IN When the current setting for high set element is set out of range on display appears EXIT the high set element of the overcurrent relay is blocked 6 5 7 Trip Block for all p...

Page 44: ...A detected earth fault can be parameterized as follows After delay time a warn only the alarm relay trips b trip the trip relay trips and tripping values are stored 6 5 13 Time current characteristics for earth fault element for E X relay types When adjusting the trip characteristics one of the following 7 abbreviations is displayed DEFT Definite Time definite time overcurrent protection NINV Norm...

Page 45: ...applies here as well 6 5 20 COS SIN Measurement ER XR relay type Depending on the neutral earthing connection of the protected system the directional element of the earth fault relay must be preset to cos or sin measurement By pressing SELECT the display shows COS resp SIN The desired measuring principle can be selected by or and must be entered with password Refer chapter 5 6 6 6 AR Parameter 6 6...

Page 46: ...ich after switching on also manually or after AR a subsequent reclos ing is prevented If the number of the set shots is reached the MRIK3 C is blocked for this time af ter the last reclosing attempt The reclaim time is started with the automatic closing command or by switching on manually An OFF command which occurs after the last permissible AR leads to a final switching off 6 6 6 Fault time acti...

Page 47: ... blocking TR_B there will be immediate tripping after blocking has been cancelled following ex piration of the block trip time if the set time of the responding protection step has already expired Figure 6 3 6 7 2 Time delay for ext Trip Via a digital input a external trip with settable time is settable The trip take place by the means of o high voltage level at the input for the set time It is po...

Page 48: ...CB failure protection function is deactivated again as soon as the phase currents have dropped to 0 within tCBFP 6 7 5 Release of the pickup relay for CB failure protection This function is working similar to the Block Trip function In the case of a fault the function is acti vated The pickup is indicated via a alarm relay to the upstream CB protection unit At the upstream CB protection unit the b...

Page 49: ... transmission it is possible to adjust different transmis sion speeds Baud rates 6 8 3 Adjustment of the Parity For adjustment of the parity there are three options even even parity odd odd parity no no check of the parity 6 9 Using communication port RS232 or RS485 The MRIK3 C relay provides two possibilities of data exchange communication The function is described in the manual MR digital multif...

Page 50: ...e 4 00 3 33 S 4 Not to be overwritten 4 00 3 33 S 7 overwrite 2 00 1 66 S 8 Not to be overwritten 2 00 1 66 s total no of recordings Table 6 2 Number and size of disturbance records The storage zone of the fault recorder is designed as ring buffer In the example shown below stor age of 7 fault recordings are possible overwriting The 8th segment serves as buffer store Memory space 6 to 4 is used Me...

Page 51: ...for 4 s at 50 Hz and 3 33 s at 60 Hz 7 8 recordings for 2 s at 50 Hz and 1 66 s at 60 Hz will be overwritten when a new trigger signal occurs 6 10 3 Adjustment of the Trigger Event There is the choice between four different trigger events P_UP PickUP Data saving begins when a general activation is recognised TRIP Data saving begins when a general trip is recognised A_PI After Pickup Data saving be...

Page 52: ...d the set tripping time expires Tripping only takes place when a the voltage at the blocking input is reduced b the voltage at the blocking input is applied the tripping time and the blocking time have ex pired refer to chapter 6 7 1 Parameter setting is to be carried out as follows After the ENTER and TRIP keys have been actuated simultaneously the display shows the text PR_B the protection stage...

Page 53: ...gnment mode The assignment mode can be reached only via the blocking mode By pressing push button SELECT RESET in blocking mode again the assignment mode is se lected The relays are assigned as follows LEDs I I IE IE are two coloured and light up green when the output relays are assigned as alarm relays and red as tripping relays In case of the MRIK3 C models the LEDs I I IE and IE always light up...

Page 54: ... _ _ I t I Alarm X _ 2 _ _ I tI Tripping X 1 _ _ _ I t Fast Trip Fast tripping X 1 _ _ _ I I IE IE CB green IE V Alarm X _ 2 _ _ IE grün tIE V Tripping X 1 _ _ _ IE t green IE R Alarm X _ 2 _ _ IE red tIE R Tripping X 1 _ _ _ IE t red IE V Alarm X _ 2 _ _ IE green tIE V Tripping X 1 _ _ _ IE t green IE R Alarm X _ 2 _ _ IE red tIE R Tripping X 1 _ _ _ IE t red tCBFP Auslösen _ _ _ _ CB green t AWE...

Page 55: ...E IE CB green IE Alarm X _ 2 _ _ IE tIE Tripping X 1 _ _ _ IE t IE Alarm X _ 2 _ _ IE tIE Tripping X 1 _ _ _ IE t tCBFP Tripping _ _ _ _ CB green t AWE Switched on X _ _ _ 4 tCI AWE unsuccess ful X _ _ 3 _ 0 1 Local Remote Switched on X _ _ _ 4 DI tCI CB red Remote Switched off immediately X 1 _ _ _ DI Trip CB green Local Remote Switched off delayed X 1 _ _ _ DI Trip CB green t I t blocked _ _ _ _...

Page 56: ...arameter set ting for the first AR Actuation of the keys permits switching over between YES and NO YES means that the selected protection function will trigger an AR Actuation of the ENTER key with subsequent one time entry of the password will store the altered value Actuation of the SELECT RESET key the protective functions are one after the other assigned to the first AR The following table sho...

Page 57: ... IE TIME FAST BLOC IE tD3 Function Protection step Display indication corresponding LED Activation I NO YES SHOT I tD4 of the 4th AR I YES NO SHOT I tD4 is permitted IE NO YES SHOT IE tD4 IE NO YES SHOT EI tD4 Function Protection step Display indication corresponding LED Trip cause I TIME FAST BLOC I tD4 After the I TIME FAST BLOC I tD4 4th AR IE TIME FAST BLOC IE tD4 IE TIME FAST BLOC IE tD4 Tabl...

Page 58: ...de the also reset BL Protection block Trip block All active protection function are blocked during pick up conditions P2 Change parameter set When the input is activated the relay change the active parameter set from Set1 to Set 2 FR Ext Trigger for the disturbance recorder If this function is allowed it starts the disturbance recorder from a external source During recording the LED FR lights If a...

Page 59: ...block the AR sequence at each time SY Synchro Check With this indication function the dead times tD of the AR function extended If this function active the relay waiting for 150ms for the Synchro check ready message after the dead time elapsed When after this time the Synchro Check input is not active the MRIK3 C interrupt the AR se quence The display show S E If the Synchro Check activated within...

Page 60: ...9k99 10k0 99k0 100k 999k 1M00 2M00 A kA kA kA kA MA active portion IP 00 999 k00 k99 1k0 9k9 10k 99k M10 M99 1M0 2M0 A kA kA kA MA MA Reactive portion IQ 00 999 k00 k99 1k0 9k9 10k 99k M10 M99 1M0 2M0 A kA kA kA MA MA rated current transformer 2kA Earth current sensitive Indication as Range Unit Secondary cur rent Active portion IP Reactive portion IQ X XR types 000 5 0 00 5 0 00 5 0 Primary earth...

Page 61: ... kA kA MA MA rated current transformer 2kA Earth voltage Indication as Range Unit sec Voltage 000V 999V V primary voltage 000 999V 1K00 9K99 10K0 99K9 100K 999K 1M00 3M00 KV KV KV KV MV 6 13 3 Indication of fault data All faults detected by the relay are indicated on the front plate optically For this purpose the four LEDs L1 L2 L3 E and the four function LEDs I I IE IE and are equipped at MRI3 No...

Page 62: ...rmanent light when the trip occured start to flash in order to indicate that is was a past fault condition Those LEDs which were flashing when the trip occured element was actuated are flashing briefly the individual fault measuring values for the respective fault can be inquired by pressing SELECT RESET If the relay has not been reset after tripping TRIP is displayed measuring values cannot be in...

Page 63: ... By applying aux voltage to C8 D8 Reset via interface By transmitting the RESET command from the Master PC An indication can only be reset if there is no protective function activated Otherwise TRIP re mains in the display The set parameters are not changed by the reset procedure 6 14 1 Erasure of the Fault Memory For erasure of the fault memory the push button combination SELECT RESET and has to ...

Page 64: ...Version Display of the relay software version part 1 E g R2 0 TRIP Device type Display of the relay software version part 2 E g ICER TRIP Handoff ID part 1 Display of the relay software version part 3 E g HO_1 TRIP Handoff ID part 2 Display of the relay software version part 4 E g 5901 TRIP PSW Call for enter the password PSW TRI Password entry Ready for tests TRIP TRIP Start the test Release of s...

Page 65: ...iary power supply with the voltage corresponding to the rated data on the type plate single phase current supply unit adjustable from 0 to 4 x In single phase voltage supply unit adjustable from 0 to 1 2 x Un Only for relays with direc tional feature timer to measure the operating time Accuracy class 10 ms switching device and test leads and tools ...

Page 66: ...For a relay with rated current In 5A for example a secondary current injection of 1A should be indi cated on the display with about 0 2 0 2 x In When parameter Iprim SEK is set the indication is 0 2 x In and at 5 the indication is 1 00 A The current can be also injected into the other cur rent input circuits Phase 2 terminals B5 B6 Phase 3 terminals B7 B8 Compare the displayed current value with t...

Page 67: ...ng value and inject the current instantaneously The operating time measured by the timer should have a deviation of less than 3 of the set value or 10 ms DEFT Accuracy for inverse time characteristics refer to IEC 255 3 Repeat the test on the other phases or with the inverse time characteristics in the similar manner In case of inverse time characteristics the injected current should be selected a...

Page 68: ... the MRIK3 relay under test For testing a relay with earth fault directional feature one of the input energizing quantity voltage shall be applied to the relay with a constant value within its effective range The other input energiz ing quantity current and phase angle shall be appropriately varied With the aid of phase angle indicated on the display the correct function of the relay MRIK3 ICER XR...

Page 69: ...running and the LED tD1 lights up green After expiration of the dead time the LED tCI briefly lights up and the auxiliary relay trips again The display shows CLOS The LED tR lights up red The LED tR signals that the reclaim time is running Once it has expired all LEDs extinguish except for the LED CB and the display shows MRIK again This completes a successful AR simulation Note After the relay ha...

Page 70: ...elay message TRIP on the display Interrupt the test current and apply auxiliary supply voltage to the external reset input of the relay terminals C8 D8 The display and LED indications should be reset immediately 7 4 10 Testing the external blocking with Block Trip function In order to simplify things the short circuit stage is to be tested here as described in Chapter 7 4 9 For this purpose the pa...

Page 71: ...osts involved and the strain on the system can be rather high Many functions of the MRIK3 C can be checked during normal operation of the system due to the efficient fault and measuring value indications So it is possible for example to compare the currents shown on the display with the values shown on the ammeters in the switchboard 7 6 Maintenance Normally the relays are checked at regular maint...

Page 72: ...orded tracks iL1 iL2 iL3 iE Sampling rate 1 25 ms at 50 Hz 1 041 ms at 60 Hz Storage capacity 16 s at 50 Hz bzw 13 33 s at 60 Hz Number of events 1 8 8 2 Common data Dropout to pickup ratio 97 Returning time 40 ms Boot time Power on time 50 ms Minimum operating time 40 ms Minimum operating time including boot time 100ms Transient overreach at instantaneous operation 5 Permissible interruption of t...

Page 73: ...nce Iprim IEprim SEK 0 001 50 0KA 0 001 0 002 0 005 0 01 0 02 0 05 0 1 0 2 UE Uprim USEK SEK 1 01 6500 0 01 0 02 0 05 0 1 0 2 0 5 1 2 5 10 20 50 UE UN 100 V e n 1 70 V 1 1 1 120 V 1 V 1 V 5 of the setting value or 0 5 UN Operating cycle counter Setting range Step Tolerance No 0 9999 1 Presetting for switch off power I2 t Setting range Step Tolerance I t 0 655 kAs 0 01 0 02 0 05 0 1 0 2 0 5 1 2 5 D...

Page 74: ...EXIT E 0 03 300 s EXIT definite time 0 05 10 EXIT inverse time 0 001 0 002 0 005 0 01 0 02 0 05 x IN 0 01 0 02 0 05 0 1 0 2 0 5 1 0 2 0 5 0 10 20 s 0 01 0 02 0 05 0 1 0 2 5 of the setting value or 0 3 IN E 3 or 15 ms 3 of the measuring value of the current or 20ms see EN60255 4 IE tIE 0 01 15 0 x IN EXIT E 0 040 10 s EXIT 0 001 0 002 0 005 0 01 0 02 0 05 0 1 0 2 0 5 x IN 0 01 0 02 0 05 s 0 1 s 0 2...

Page 75: ...rotection stage is blocked Permitted for AR YES NO YES Tripping of the chosen trip stage leads to reclosing NO Tripping of the chosen trip stage blocks the reclosing tD1 0 1 20 s 0 01 0 02 0 05 0 1 0 2 0 5 1 s Fixed Parameter Fixed parameter Value Tolerance Remarks Trip delay time 200 ms 20 ms This time starts with the protection tripping com mand before the first AR and is interrupted by the C B ...

Page 76: ... Setting range Step Tolerance CB green t 0 1 2 0 s EXIT 0 01 0 02 0 05 0 1 s 1 or 10 ms 8 3 7 Interface parameter Parameter LED Setting range Step Tolerance RS 1 32 Slave address 1 RS 2400 4800 9600 Baud Rate 2400 4800 RS even odd no Parity even odd none 8 3 8 Parameter for the fault recorder Parameter LED Setting range Step Tolerance Number of recordings FR 1 3 7 2 4 8 Existing recordings to be o...

Page 77: ...nverse s t 1 Is I 120 t I RI inverse s t I I 236 0 339 0 1 t I S RXIDG characteristic s t Is I n 3 1 8 5 t I Where t tripping time tI time multiplier I fault current Is Setting range of the current n natural logarithm 8 4 2 Determination of earth fault direction MRIK3 ER XR Measurement of active current in component for compensated systems IE x cos Measurement of reactive current component for iso...

Page 78: ...ung 8 1 Normal Inverse Abbildung 8 2 Very Inverse 1 2 3 4 5 6 7 8 910 20 I IS 0 1 1 10 100 1000 t s tI 0 05 0 1 0 2 0 3 0 4 0 5 0 6 0 8 1 0 1 4 2 0 3 0 4 0 6 0 8 0 10 0 1 2 3 4 5 6 7 8 910 20 I IS 0 1 1 10 100 1000 t s tI 0 05 0 1 0 2 0 3 0 4 0 5 0 6 0 8 1 0 10 0 1 4 2 0 3 0 4 0 6 0 8 0 ...

Page 79: ...se Abbildung 8 4 RI Inverse 1 2 3 4 5 6 7 8 910 20 I IS 0 01 0 1 1 10 100 1000 t s tI 0 05 0 05 0 1 0 1 0 2 0 3 0 4 0 5 0 6 0 8 1 0 10 0 1 4 2 0 3 0 4 0 6 0 8 0 1 2 3 4 5 6 7 8 910 20 I IS 0 1 1 10 100 t s tI 10 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 05 ...

Page 80: ...rse 1 2 3 4 5 6 7 8 910 20 I IS 0 1 1 10 100 t s tI 8 0 6 0 3 0 4 0 2 0 1 6 1 0 1 4 1 2 10 0 0 8 0 6 0 5 0 4 0 3 0 2 0 1 0 05 Abbildung 8 6 RXIDG Kennlinie 1 2 3 4 5 6 7 8 910 20 I IS 0 1 1 10 100 1000 10000 t s tI 1 0 2 0 10 0 8 0 6 0 5 0 4 0 3 0 0 8 0 6 0 5 0 4 0 3 0 2 0 1 0 05 ...

Page 81: ...ung 8 7 Unabhängige Auslösekennlinie 8 6 Output relays Contacts 2 change over contacts for relays 1 and 2 1 change over contact for relays 3 4 1 10 I IN 0 01 0 1 1 10 100 t s tI tI I I tI tI 300 300 0 03 0 03 1 0 1 0 40 40 10 10 0 03 0 03 I I 0 2 0 2 4 0 4 0 ...

Page 82: ...ent 1 A 5 A I1 I5 Control and supervision of one circuit breaker Earth current standard Rated current 1 A sensitive 1 A E1 X1 Directional feature in earth path Rated voltage 100 V R1 Housing 12TE Flush mounting Communication protocol Modbus RTU Please leave box empty if option is not desired only available with directional feature Technical data subject to change without notice ...

Page 83: ...utes minute m 00 Setting of the seconds second s 00 System parameter LED Function Unit Default Actual settings settings L1 L2 L3 green Iprimär Phase Display of measuring values as primary quantities xIn kA sek E green Iprimär earth Display of measuring values as primary quantities xIn kA sek E green UE Uprim Usek earth Display of residual voltage as pri mary quantities sek UE Setting of the transf...

Page 84: ...tage trip IE t green Tripping time in forward direction s 0 04 IE t red Tripping time in reverse direction s 0 04 IE t Tripping delay time for earth overcurrent element s 0 04 IE t Fast trip at manual switch on at IE TIME IE Pick up value for the earth short circuit element xIn 0 01 0 1 IE t green Tripping time in forward direction s 0 04 IE t red Tripping time in reverse direction s 0 04 IE t Tri...

Page 85: ...ers LED Function Default set ting Actual set ting RS Slave Address of the serial interface 1 RS Baud rate of the serial interface 9600 RS Parity check of the serial interface even Entry via TRIP and ENTER Button Assignment of the blocking functions LED Function Default setting Actual setting Set 1 Set 2 Set 1 Set 2 I I IE IE t Switch over for protection blocking or trip blocking PR_B PR_B I Overcu...

Page 86: ...t IE trip X IE green IE Alarm Forward X IE t green IE trip Forward X IE red IE Alarm Reverse X IE t red IE trip Reverse X IE IE Alarm X IE t IE trip X IE green IE Alarm X IE t green IE trip X IE red IE Alarm X IE t red IE trip X CB green t Circuit Breaker Failure Protection tCI Switch on impulse X 0 1 AR unsuccessful X DI tCI CB red Manual switch on X DI Trip CB green Manual switch off immediately...

Page 87: ...mitted if the IE stage is the tripping cause NO NO Tripping after 2 nd AR I tD2 For overcurrent stage TIME TIME I tD2 For short circuit stage TIME TIME IE tD2 For earth overcurrent stage TIME TIME IE tD2 For earth short circuit stage TIME TIME Permitted for the 3 rd AR SHOT I tD3 AR is permitted if the I stage is the tripping cause NO NO SHOT I tD3 AR is permitted if the I stage is the tripping ca...

Page 88: ...set tings plugged Not plugged X X X not active at MRIK3 C relay types Digital inputs Code jumper Function Low High range for the digital inputs Terminal Low plugged High not plugged Default settings Actual settings D8 C8 1 digital input plugged D8 E8 2 digital input plugged D8 A2 3 digital input plugged D8 A5 4 digital input plugged D8 A6 5 digital input plugged D8 A7 6 digital input plugged D8 A8...

Page 89: ...Manual MRIK3 C EN Woodward DOK TD MRIK3 C Rev A 89 ...

Page 90: ...en Germany Postfach 10 07 55 P O Box D 47884 Kempen Germany Phone 49 0 21 52 145 1 Internet www woodward com Sales Phone 49 0 21 52 145 216 or 342 Telefax 49 0 21 52 145 354 e mail salesEMEA_PGD woodward com Service Phone 49 0 21 52 145 614 Telefax 49 0 21 52 145 455 e mail SupportEMEA_PGD woodward com ...

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