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MRI(K)3-C

–

Digital time overcurrent relay with Control

function and auto reclosing

Summary of Contents for MRI3-C

Page 1: ...MRI K 3 C Digital time overcurrent relay with Control function and auto reclosing...

Page 2: ...on 4 6 Earth fault directional feature ER XR relay type 4 7 Control functions 4 7 1 Introduction 4 7 2 Interlocking Password for control mode 4 7 3 Operating assignment of C B control 4 7 4 Changing t...

Page 3: ...t of the digital inputs 5 11 5 Description of the digital input function 5 12 Measuring Value and Fault Indications 5 12 1 Measuring Value Indications 5 12 2 Units of the measuring values displayed 5...

Page 4: ...e IMT trip characteristics of IEC 255 4 Normal inverse Type A Very inverse Type B Extremely inverse Type C Special purpose characteristics Reset mode for DMT IMT trip characteristics is se lectable De...

Page 5: ...TB MRI K 3 C 03 02 E 5 3 Design 3 1 Connections Figure 3 1 Connection diagram MRIK3 ICE MRI3 ICE Figure 3 2 Connection diagram MRIK3 ICER MRI3 ICER...

Page 6: ...s and earth current detection in Holmgreen connection IE This kind of connection can be used where three phase CTs are available and a combination of phase and earth current measuring is required Figu...

Page 7: ...upervision 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 princi pl...

Page 8: ...are activated according to the preset ting Code jumper 3 OFF All output relays will be reset automatically after the fault has been rectified e g when the fault current is interrupted Code jumper 3 O...

Page 9: ...d CB ist switched on CB green CB is switched off CB blinking CB has faults 3 3 2 Adjusting LEDs I Overcurrent setting tI Tripping time for the overcurrent I Short circuit setting tI Tripping for the s...

Page 10: ...ion of the earth current IP Indication of the active component of the earth fault current IQ Indication of the reactive component of the earth fault current Date and time CB red CB ist switched on CB...

Page 11: ...e pickup value an alarm is given and after the set trip delay has elapsed the corresponding trip relay is ac tivated The relay setting values for all parameters are stored in a parameter memory EEPROM...

Page 12: ...5 11 3 4 3 9 Activating of AR Prior to every AR it is possible to stipulate which kind of tripping I or I etc will lead to automatic re closing This can be separately fixed for each AR stage see chapt...

Page 13: ...ital input is activated during this period the ON signal is set without delay 4 4 Functional sequence 4 4 1 Switching on MRIK3 C Is the C B to be supervised in OFF position while switching ON the MRIK...

Page 14: ...ommand re mains either as long as the ON signal from the circuit breaker appears or the close impuls timer tCL has ex pired The LED tCL lights up for the duration of the close im pulse When the CB ON...

Page 15: ...ith subsequent tripping of the protection relay The circuit breaker is switched off and the short circuit is cleared After expiration of the dead time tD1 unit MRIK3 C gives the reclosing command to t...

Page 16: ...lines Short circuit Protection energized Protection tripped Circuit breaker Switch on command Manual on Protection tripped Figure 4 3 Manual closing of the C B to faulty lines Unit MRIK3 C is in inact...

Page 17: ...the generator and the location of the current transformers supplying the relay Earth faults beyond the current transformers i e on the consumer or line side will not be detected Figure 4 5 Generator...

Page 18: ...lt direction can be measured in three different ways depending on the voltage transformer connec tions refer to Table 4 2 Total current can be measured by connecting the unit either to a ring core C T...

Page 19: ...nce 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...

Page 20: ...splay Display RMOT Switching on and off function via the front panel is blocked 4 7 4 Changing the operating assignment Changing the operating assignment requires the fol lowing procedure Simultaneous...

Page 21: ...ated for a C B control function must be used see chapter 5 11 4 and 5 11 5 A detailed function assignment for the control signals for the C B can be found in Chapter 4 7 9 ON The C B is switched off T...

Page 22: ...harts the detail handling is shown Control modus activation Display SEG Key Enter Key AND Mode Controlling Mode indication LCAL RMOT LCAL RMOT OR Change Mode Remote operation CB control only via seria...

Page 23: ...ion 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 emit...

Page 24: ...0 Flashed red CB 0 1 Flashed red CB 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 Flashed red CB 0 1 Flashed red CB 1 0 Emits r...

Page 25: ...shed 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 r...

Page 26: ...d red 1 Emits green 0 x Emits green 1 x Flashed red 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 Fl...

Page 27: ...s have to be designed as protection transformers P Overcurrent Factor To ensure precise operation of the protection unit even under full short circuit current the chosen transformers must not saturate...

Page 28: ...tRST Chap 5 5 5 Reset mode for earth current 0s 60s I CHAR t I tRST Chap 5 5 15 Warning or Trip at earth fault measuring TRIP WARN IE Chap 5 5 11 Measured method of the residual voltage UE 1 E N 1 1 C...

Page 29: ...ter SAV Manual trip TRI Blocking of the protection function BLOC NO_B PR_B TR_B LED of the blocked pro tection stage Chap 5 11 1 Relay assignment z B _ 2 _ _ LED of the blocked pro tection stage Chap...

Page 30: ...ree digit point Example A 1500 5 A CT is used with a primary current of 1380 A The parameter for the CT primary current is given in kiloampere The parameter is set to 1 50 kA Then 1K38 is displayed as...

Page 31: ...h preceding load To indicate that the max value of the switch off power is reached a alarm output can be set The indication take place be the means of a LED and or output relay The max possible value...

Page 32: ...tting then the processor sets the tripping time or time factor to the highest sensible value smallest possible tripping time When adjusting to the Definite Time trip characteristic the definite trippi...

Page 33: ...3 ICE and MRI K 3 ICXR re lates to IN 5 5 11 WARN TRIP changeover 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...

Page 34: ...attempt follows only if the command time of the protection devices is shorter than the fault time set at MRIK3 5 6 3 Dead time tD Starts with the OFF signal of the circuit breaker No clos ing command...

Page 35: ...Trip Via a digital input a external trip with settable time is set table The trip take place by the means of o high volt age level at the input for the setet time It is possibe to assign this in out f...

Page 36: ...after the settable CB failure time Chap 5 7 4 and clear the block input of the upstream protection unit and acti vated the tripping I tI t1 0 tI t1 0 I tCBFP Protection Block Trip Block t1 0 Figure 5...

Page 37: ...rtitioning of the store into 8 segments for instance This example shows that the store was used for more than 8 recordings because store spaces 6 7 and 8 are used From this it follows that no 6 was th...

Page 38: ...is displayed 5 9 4 Pre Trigger time Tvor The time Tpre defines the period to be saved prior to the trip event This time can be set between 0 05 s and the max recording time 2 4 or 8 s With push butto...

Page 39: ...ill store the set func tion By pressing the SELECT RESET pushbutton all further protective function that can be blocked are called one after the other After selection of the last blocking function ren...

Page 40: ...3 4 2 3 and 4 1 2 3 4 all By pressing push buttons and all possible com binations can be realised The selected allocation can be saved by ENTER and subsequent entry of the password Any allocation mod...

Page 41: ...ripping X 1 _ _ _ IE t red tIE red IE V Alarm X _ 2 _ _ IE green tIE V Tripping X 1 _ _ _ IE t green tIE green IE R Alarm X _ 2 _ _ IE red tIE R Tripping X 1 _ _ _ IE t red tIE red TCBFP Ausl sen _ _...

Page 42: ...s will be assigned to the individual protection stages for pa rameter setting before the 1 st AR Actuation of the keys permits switching over between BLOC TIME or FAST Here the following functions are...

Page 43: ...2 After the I TIME I tD2 2 nd AR IE TIME IE tD2 IE TIME IE tD2 Function Protec tion step Display indication corresponding LED Activation I NO SHOT I tD3 of the I YES SHOT I tD3 3 rd AR per IE NO SHOT...

Page 44: ...ical function in a short from 1 RE This means that the DI No 1 is assign to the function reset The following func tions are available NO no function RE Reset Display and Relay BL Protection block trip...

Page 45: ...e requirements for a manual switch ON operation When a high level at the assigned digi tal input take place the relay trips immediately When the digital input is reset to low level a counter starts an...

Page 46: ...2 LED L2 green Current in phase 3 LED L3 green Earth current LED E green active earth current LED E and IP green reactive earth current LED E and IQ green residual voltage UR LED UE angle between IE...

Page 47: ...rtion IQ 00m 99m 00 999 k00 k99 1k0 9k9 mA A kA kA rated current transformer 0 019kA rated current transformer 20kA Earth current normal Indication as Range Unit Secondary current Active portion IP Re...

Page 48: ...erma nent light when the trip occured start to flash in or der to indicate that is was a past fault condition Those LEDs which were flashing when the trip oc cured element was actuated are flashing br...

Page 49: ...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 remains in the di...

Page 50: ...assword entry Ready for tests TRIP TRIP Start the test Release of self test relay Pick up of all output relays Test of all LEDs Select Reset SEG Finish the test Output relays return to their cur rent...

Page 51: ...out directional feature For testing MRI K 3 C relays without directional feature only current input signals are required Figure 6 1 shows a simple example of a single phase test circuit with ad justab...

Page 52: ...ccuracy of earth cur rent measuring 3 of measuring value 6 4 3 Checking the relay operating time For this test the AR function should be deactivated The number of automatic reclosing attempts SHOT sho...

Page 53: ...lay 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 ef fective range Th...

Page 54: ...is impossible tCBFP must be set to EXIT 6 4 7 Checking the circuit breaker position First the digital inputs have to be assigned the relevant functions In order to recognised the circuit breaker posi...

Page 55: ...reaker failure protection trips In this case the previously measured tripping delay has to be subtracted from the total tripping time measured 6 5 Primary Test As a rule tests with currents at the CT...

Page 56: ...s at 60 Hz Storage capacity 16 s at 50 Hz bzw 13 33 s at 60 Hz Number of events 1 8 7 2 Common data Dropout to pickup ratio 97 Returning time 40 ms Time lag error class index E 20 ms Minimum operating...

Page 57: ...n 1 70 V 1 1 1 120 V UN 230 V e n 2 160 V 1 1 2 300 V UN 400 V e n 5 300 V 1 1 5 500 V 1 V 1 V 2 V 2 V 5 V 5 V 5 of the setting value or 0 5 UN Operating cycle counter Setting range Step Tolerance No...

Page 58: ...05 x IN 0 01 0 02 0 05 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 0 03 IN X 3 or 15 ms 3 of the measuring value of the current or 20ms...

Page 59: ...blocked Permitted for AR YES NO YES Tripping of the choosen trip stage f hrt zur Wiedereinschaltung NO Tripping of the choosen trip stage block the reclosing tD1 0 1 20 s 0 01 0 02 0 05 0 1 0 2 0 5 1...

Page 60: ...02 0 05 0 1 s 1 or 10 ms 7 3 7 Interface parameter Parameter LED Setting range Step Tolerance RS 1 32 Slave Adresse RS 2400 4800 9600 Baud Rate RS even odd no Parity even odd none 7 3 8 Parameter for...

Page 61: ...120 t I RI inverse s t I I 236 0 339 0 1 t I S RXIDG characteristic s t I I n 3 1 8 5 t I S l Where t tripping time tI time multiplier I fault current Is Setting range of the current n l natural logar...

Page 62: ...100 1000 t s tI 0 1 0 2 0 3 0 4 0 5 0 6 0 8 1 0 1 4 2 0 3 0 4 0 0 6 6 0 8 0 10 0 20 0 0 06 Figure 7 2 Very Invers Typ B 1 2 3 4 5 6 7 8 910 20 I IS 0 01 0 1 1 10 100 1000 10000 t s tI 0 1 0 2 0 3 0 4...

Page 63: ...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 Figure 7 6 RXIDG characteristic 1 10 I IN 0 01 0 1 1 10 100 t s I tI I tI 4 0 260 0...

Page 64: ...sh mounting A D Communication protocol Modbus RTU Please leave box empty if option is not desired Time overcurrent earth fault current re lay with control function MRI3 C M 3 phase current I I Rated c...

Page 65: ...ting of the seconds second s 00 System parameter LED Function Unit Default Actual settings settings L1 L2 L3 green Iprim r Phase Display of measuring values as primary quantities xIn kA E green Iprim...

Page 66: ...nt xIn 0 01 0 1 IE Warning Tripping of the earth current stage trip IE t green tIE green Tripping time in forward direction s 0 04 IE t red tIE red Tripping time in reverse direction s 0 04 IE t IE Fa...

Page 67: ...IE stage is the tripping cause NO NO Tripping after 2nd 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 s...

Page 68: ...ding at the event TRIP FR Time period prior to the trigger impulse s 0 05 Interface parameters LED Function Default setting Actual set ting RS Slave Address of the serail interface 1 RS Baud rate of t...

Page 69: ...I Alarm X I t tI I trip X I I Alarm X I t tI I trip X I I IE IE CB green I I IE IE Fast Fast trip step X IE IE Alarm X IE t tIE IE trip X IE IE Alarm X IE t tIE IE trip X CB green t CB failure protec...

Page 70: ...tual settings plugged Not plugged X X X only MRI3 relay types Digital inputs Code jumper Function Low High range for the digital inputs Terminal Low plugged High not plugged Default settings Actual se...

Page 71: ...01 Setting of the hours hour h 00 Setting of the minutes minute m 00 Setting of the seconds second s 00 System parameter LED Function Unit Default Actual settings settings L1 L2 L3 green Iprim r Phase...

Page 72: ...Tripping of the earth current stage Trip IE CHAR Trip characteristics for the phase overcurrent element DEFT IE t tIE Tripping time factor for the earth overcurrent element s 0 03 IE t IE Fast Fast t...

Page 73: ...E stage is the tripping cause NO NO Tripping after 2nd 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 sh...

Page 74: ...t the event TRIP FR Time period prior to the trigger impulse s 0 05 Interface parameters LED Function Default setting Actual set ting RS Slave Address of the serail interface 1 RS Baud rate of the ser...

Page 75: ...I I tripping X I I alarm X I t tI I tripping X I I IE IE CB gr n I I IE IE Fast Fast trip stage X IE IE alarm X IE t tIE IE tripping X IE IE alarm X IE t tIE IE tripping X CB gr n t CB failure protect...

Page 76: ...Actual settings plugged Not plugged X X X only MRI3 relay types Digital inputs Code jumper Function Low High range for the digital inputs Terminal Low plugged High not plugged Default settings Actual...

Page 77: ...TB MRI K 3 C 03 02 E 77...

Page 78: ...ermany Phone 49 0 21 52 145 1 Internet Homepage http www newage avkseg com Documentation http doc newage avkseg com Sales Department Phone 49 0 21 52 145 635 Europe Phone 49 0 21 52 145 319 Latin Amer...

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