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2 PRODUCT DESCRIPTION
2.16TECHNICAL SPECIFICATIONS
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
2.16.1.1 PHASE / GROUND TIME OVERCURRENT (51P,51G)
Current:
Pickup Level:
Dropout Level:
Level Accuracy:
Curve Shapes:
Time Dial:
Reset Type:
Timing Accuracy:
Type/measure time:
2.16.1.2 PHASE / GROUND INSTANTANEOUS OVERCURRENT (50P1, 50P2, 50G1, 50G2)
Current:
Pickup Level:
Dropout Level:
Level Accuracy:
Overreach:
Time Delay:
Reset Type:
Operate Time:
Timing Accuracy:
Type/measure time:
GEK-106237P
Fundamental
0.1 – 2.4 times In (rated current) in steps of 0.01 x In (51P & 51G if 1/5 A
ground models)
0.005-0.12 A in (51G in sensitive ground model)
97% (typical) of Pickup
±1% at rated current
±3% of injected current ±0.1% full scale in the whole range
IEC (B.S.) A/B/C
ANSI Inverse, Very Inverse, Extremely Inverse, user defined
IAC Inverse, Very Inverse, Extremely Inverse, Inverse Short or Inverse Long
Time delayed (0.00 to 600.00 sec. in steps of 0.01 sec).
0.05 to 2 in steps of 0.01 for IEC curves
0.5 to 20 in steps of 0.1 for ANSI curves
0.5 to 10 in steps of 0.1 for IAC curves
Instantaneous
± 5% + 50 ms of set time for 2< I < 20 times the Actual Pickup Level for IEC/
ANSI/definite time curves. For I<2 times the Actual Pickup refer to
APPENDIX F TIMING ACCURACY FOR 51 ELEMENT.
± 6% of set time for 2 < I < 20 times the Actual Pickup for IAC curves
DFT of 1 cycle
Fundamental
0.1 to 30.0 times In (rated current) in steps of 0.1 x In. (50P1/P2 & 50G1/G2
for 1/5 A ground models)
0.005 to 0.12 A (50G1/G2 for sensitive ground models)
97% (typical) of Pickup
±1% at rated current
±3% of injected current ±0.1% full scale in the whole range
< 2%
0.00 to 600.00 sec. in steps of 0.01 s
Instantaneous
Between 20 and 30 ms for I> 2 x Actual Pickup
± 5% or 50ms(whichever is greater) of settled time for I > 2 times the Actual
Pickup
DFT of 1 cycle
MIFII Digital Feeder Relay
2.16 TECHNICAL SPECIFICATIONS
2.16.1 PROTECTION ELEMENTS
2
2-25
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