Iac Very Inverse Curve; Iac Extremely Inverse Curve; Iac Inverse Long Curve; Iac Inverse Short Curve - GE MIFII GEK-106237P Instruction Manual

9 RELAY COMMISSIONING
Set the relay as follows:
51P SETTINGS GROUP
Curve
Time Dial
Apply 0.9 times the pickup current at the ground terminals and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 27.27 and 30.75 sec.
Apply 5 times the pickup current and the relay should trip between 2.50 and 2.82 sec.
Set the relay as follows:
51P SETTINGS GROUP
Curve
Time Dial
Apply 0.9 times the pickup current at the ground terminals and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 31.94 and 36.02 sec.
Apply 5 times the pickup current and the relay should trip between 2.31 and 2.60 sec.
Set the relay as follows:
51P SETTINGS GROUP
Curve
Time Dial
Apply 0.9 times the pickup current at the ground terminals and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 122.17 and 137.77 sec.
Apply 5 times the pickup current and the relay should trip between 31.35 and 35.36 sec.
Set the relay as follows:
Apply 0.9 times the pickup current at the ground terminals and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 1.38 and 1.56 sec.
Apply 5 times the pickup current and the relay should trip between 0.53 and 0.60 sec.
GEK-106237P
51P SETTINGS GROUP
Curve
Time Dial
MIFII Digital Feeder Relay
9.15 PHASE TOC ELEMENT (51P)
VERY INVERSE
10

9.15.9 IAC EXTREMELY INVERSE CURVE

EXTREMELY INVERSE
10

9.15.10 IAC INVERSE LONG CURVE

VERY INVERSE
10

9.15.11 IAC INVERSE SHORT CURVE

EXTREMELY INVERSE
10

9.15.8 IAC VERY INVERSE CURVE

9
9-17