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TB MRI3-ITE(R) 12.00 E

7.3.2

Time overcurrent protection and thermal replica

Setting range

Step

Tolerance

B,Alarm

0.4...3.5 x I

(EXIT)

0.02 x I

(0.4...1.0)

0.05 x I

(1.0...3.5)

3% from set value

2.5% I

0.5...5

0.01 (0.5...1.0)
0.02 (1.0...2.0)
0.05 (2.0...5.0)

B,TRIP

0.4...3.5 x I

(EXIT)

0.02 x I

(0.4...1.0)

0.05 x I

(1.0...3.5)

3% from set value

2.5% I

0.5...5

0.01 (0.5...1.0)
0.02 (1.0...2.0)
0.05 (2.0...5.0)

0.5...180 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

0.5...180 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

0.2...4.0 x I

(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

0.04 - 260 s (EXIT)
(definite time)

0.05 - 20 (EXIT)
(inverse time)

0.02 (0.04...1.0)
0.05 (1.0...2.0)
0.1 (2.0...5.0)
0.2 (5.0...8.5)
0.5 (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

I>>

0.5...40 x I

(EXIT)

0.05 (1.0...2.0)
0.1 (2.0...4.0)
0.2 (4.0...10.0)
0.5 (10.0...20.0)
1.0 (20.0...40.0)

3% from set value

I>>

0.04...10 s (EXIT)

0.02 (0.04...0.5)
0.05 (0.5...2.0)
0.1

(2.0...5.0)

0.2

(5.0...10)

3% or

20 ms

Table 7.1: Setting values and steps

Содержание High Tech MRI3-ITE

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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