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TB MRI3-ITE(R) 12.00 E

Assignment of the blocking function:

Default setting

Actual setting

Parameter switch

Set 1

Set 2

Set 1

Set 2

Blocking the protection function PR_B

PR_B

Blocking the trip step TR_B

Default setting

Actual setting

Function

Blocking

No blocking

Blocking

No blocking

Parameter set

Set 1

Set 2

Set 1

Set 2

Set 1

Set 2

Set 1

Set 2

I>>

E>>

CBFP

Assignment of the output relays

Funktion

Relais 1

Relais 2

Relais 3

Relais 4

Default

setting

Actual
setting

Default

setting

Actual
setting

Default

setting

Actual
setting

Default

setting

Actual
setting

B,A

alarm

B,A

trip

B,T

alarm

B,T

trip

I> alarm

I> trip

I>> alarm

I>> trip

IE>(V) alarm

IE>(V) trip

IE>>(V) alarm

IE>>(V) trip

IE>(R) alarm

IE>(R) trip

IE>>(R) alarm

IE>>(R) trip

tCBFP trip

Summary of Contents for High Tech MRI3-ITE

Page 1: ...MRI3 ITE R Time overcurrent relay with thermal replica and earth current measuring...

Page 2: ...I 5 4 6 Trip delay or time multiplier for phase overcurrent element tI 5 4 7 Reset setting for inverse time tripping characteristics in the phase current path 5 4 8 Current setting for high set eleme...

Page 3: ...reset functions 6 4 9 Testing the external blocking with Block Trip function 6 4 10 Test of the CB failure protection 6 5 Primary injection test 6 6 Maintenance 7 Technical data 7 1 Measuring circuits...

Page 4: ...erations earth current only in accordance with the requirements as per IEC 255 8 VDE 435 part 3011 for overload relays two parameter sets selectable protective functions between definite time overcurr...

Page 5: ...hase current measuring and earth current detection by means of Holmgreen circuit This connection can be used with three existing phase current transformers when combined phase and earth current measur...

Page 6: ...s are equipped with two change over con tacts and three relays with each one change over con tact for alarm Apart from the relay for self supervision all protective functions can be optionally assigne...

Page 7: ...data have been read and deleted the recorder to ready again for further action Writing over If 1 3 or 7 recordings are chosen the relevant num ber of partial segments is reserved in the complete memo...

Page 8: ...are two coloured LEDs left to the alpha numerical display light up green during measuring and red at alarm LEDs underneath the pushbutton SELECT RESET light up green during setting and inquiry of the...

Page 9: ...tion in the protected object For the calculation of the current value an efficient digi tal filter based on the Fourier Transformation DFFT Discrete Fast Fourier Transformation is applied to sup press...

Page 10: ...bject to be protected reaches its tripping value after expiry of a long time Trip k 2 100 Adjustment of the nominal current with IB e g 1 IN and selection of an overload factor k e g 1 2 From this a p...

Page 11: ...sible operating cur rent B in stationary condition the electrical equipment reaches the maximum allowed operating temperature B For this load the temperature equivalent is defined as k 2 100 k I I B 2...

Page 12: ...nt time constants After switching off the electrical equipment In 0 temperature will decrease and tend towards n 0 environmental temperature e g cooling down 2 warming up Depending on the comparison b...

Page 13: ...supplying the relay Earth faults beyond the current transformers i e on the consumer or line side will not be detected Figure 4 4 Generator stator earth fault protetion 4 5 2 System earth fault protec...

Page 14: ...E required for determining earth fault direction can be measured in three different ways depending on the voltage transformer connec tions refer to Table 4 1 Total current can be measured by connectin...

Page 15: ...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 16: ...ction K1 1 2 1 5 K1 Current factor related to set value Moreover the current transformers have to be rated according to the maximum expected short circuit cur rent in the network or in the protected o...

Page 17: ...A and T Enquiry failure memory FLT1 FLT2 SELECT RESET L1 L2 L3 E I I IE IE Delete failure memory wait SELECT RESET Relay trip TRIP TRIP or after fault tripping Secret password input XXXX ENTER SELECT...

Page 18: ...t exceeded IB A k IB A A Tripping red flashing Temperature limit of overload low set element reached IB T Setting green continuously Setting switching point kT Setting red continuously Define constant...

Page 19: ...in the same way as that described under 5 3 1 5 3 3 Display of residual voltage UE as primary quantity Uprim Usec The residual voltage can be shown as primary measur ing value For this parameter the...

Page 20: ...liary voltage to one of the external inputs Important note When functioning as parameter change over facility the external input RESET is not available for resetting When using the external input BLOC...

Page 21: ...I The most sensitive time set ting value means the fastest tripping for the selected re lay characteristic When the time delay or the time multiplier is set out of range Text EXIT appears on the displ...

Page 22: ...et to cos or sin measure ment By pressing SELECT RESET the display shows COS resp SIN The desired measuring principle can be selected by or and must be entered with password 5 4 19Block Trip time only...

Page 23: ...duration of 2 s with 50 Hz 1 66 s with 60 Hz is written over when a new trigger signal arrives 5 5 3 Adjustment of trigger occurences There is a choice between four different occurences P_UP PickUP S...

Page 24: ...e SELECT RESET pushbutton all further protective function that can be blocked are called one after the other After selection of the last blocking function re newed pressing of the SELECT RESET pushbut...

Page 25: ...hout assignment mode this jumper is used for parameter setting of alarm relays activation at pickup or tripping A form is attached to this description where the set ting requested by the customer can...

Page 26: ...tive portion IP Reactive portion IQ 0 00 40 0 00 40 00 40 x In x In x In Primary current 000 999 k000 k999 1k00 9k99 10k0 99k0 100k 999k 1M00 2M00 A kA kA kA kA MA Earth current Indication as Range Un...

Page 27: ...LEDs which showed a continuous light when the fault occured are now blinking blinking to indicate that it is not a current fault LEDs which were blinking blinking dur ing trip conditions element had p...

Page 28: ...D21 By pressing the pushbutton TRIP twice the display shows the second part of the soft ware version of the relay e g 1 00 The software version should be quoted in all correspondence Press ing the TRI...

Page 29: ...rim s is set the indication is 0 2 x In and at 5 the in dication is 1 00 A The current can be also injected into the other current input circuits Phase 2 terminals B5 B6 Phase 3 terminals B7 B8 Earth...

Page 30: ...transformer connection for residual voltage meas uring refer to 5 3 4 must be adjusted to 3Pha The appropriate measuring value is selected via the SELECT RESET key The display must indicate 1 3 of the...

Page 31: ...current must be very stable Otherwise the test results may be wrong This espacially applies for cur rents smaller than 2 x IS where the trip delays are in the steep range of the inverse curves 6 4 7...

Page 32: ...the pro tected power system should be in this case con nected to the installed relays under test on line and the test currents and voltages should be injected to the relay through the current and volt...

Page 33: ...2 x IN to 0 5 x IN 100 Returning time 30 ms Time lag error class index E 10 ms Minimum operating time 60 ms Transient overreach at instantaneous operation 5 Permissible interruption of the supply volt...

Page 34: ...0 002 0 200 0 002 kA 0 200 0 500 0 005 kA 0 500 1 00 0 01 kA 1 00 2 00 0 02 kA 2 00 5 00 0 05 kA 5 00 10 0 0 1 kA 10 0 20 0 0 2 kA 20 0 50 0 Ue Uprim Usek SEK 1 01 6500 0 01 1 01 2 00 0 02 2 00 5 00 0...

Page 35: ...min 0 1 0 5 2 min 0 2 2 5 min 0 5 5 10 min 1 10 20 min 2 20 50 min 5 50 100 min 10 100 180 min I 0 2 4 0 x IN EXIT 0 01 0 2 0 5 0 02 0 5 1 0 0 05 1 0 2 0 0 1 2 0 4 0 3 from set value tI 0 04 260 s EXI...

Page 36: ...8 5 10 0 1 0 10 20 2 0 20 50 5 0 50 100 10 0 100 260 0 01 0 05 0 5 0 02 0 5 1 0 0 05 1 0 2 0 0 1 2 0 5 0 0 2 5 0 10 0 0 5 10 0 20 0 3 or 20 ms 5 for NINV and VINV 7 5 for NINV and EINV IE 0 01 2 0 x...

Page 37: ...ockTrip time BLOCK TRIP 0 1 2 0 s EXIT 0 01 0 02 0 05 0 1 s 1 bzw 10 ms 7 3 7 Switch failure protection tCBFP 0 1 2 0 s EXIT 0 01 0 02 0 05 0 1 s 1 bzw 10 ms 7 3 8 Interface parameter Function Paramet...

Page 38: ...als a permanent load current of k IB Trip k 2 100 For the tripping characteristic TRIP t 2 B 2 2 B 2 P 2 B 2 TRIP e 100 I k I 100 I k I 100 I k I 100 or k I I I I e e I I k I I I I I k I B P t t P B P...

Page 39: ...cording to IEC 255 8 t I I p I I k TRIP B B ln 2 2 2 2 2 2 1 1 25 1 5 1 75 2 2 25 2 5 I IB 0 01 0 02 0 04 0 06 0 08 0 1 0 2 0 4 0 6 0 8 1 2 t trip p 0 2 p 0 3 p 0 4 p 0 5 p 0 6 p 0 7 p 0 8 p 0 9 p 0 F...

Page 40: ...014 0 02 1 Very Inverse type B t I Is t I s 135 1 Extremely Inverse type C t I Is t I s 80 2 1 Long time inverse 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 I I...

Page 41: ...910 20 I IS 0 1 1 10 100 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 3 Very Inverse 1 2 3 4 5 6 7 8 910 20 I IS 0 01 0 1 1 10 100 1000 10000 t s tI...

Page 42: ...0 100 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 7 RXIDG characteristic 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...

Page 43: ...3 T 3 phase current I I Rated current 1 A 5 A I1 I5 Thermal replica Earth current none Rated current 1 A 5 A E1 E5 Directional feature in earth path none Rated voltage 100 V in earth path 230 V 400 V...

Page 44: ...X X X 0 5 W Time constant warming up min X X X 0 5 I Pickup value for phase overcurrent x IN X X X 0 20 CHAR I Tripping characteristic for phase overcurrent element X X X DEFT tI Trip delay for phase...

Page 45: ...ameter set Set 1 Set 2 Set 1 Set 2 Set 1 Set 2 Set 1 Set 2 I X X I X X IE X X IE X X tCBFP X X Assignment of the output relays Funktion Relais 1 Relais 2 Relais 3 Relais 4 Default setting Actual setti...

Page 46: ...Setting of the second Second s 00 Setting of code jumpers Code jumper J1 J2 J3 Default setting Actual setting Default setting Actual setting Default setting Actual setting Plugged Not plugged X No fu...

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