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

9.15 PHASE TOC ELEMENT (51P)
Set the relay as follows:
Apply 0.9 times the pickup current into phase A and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 36.2 and 51.3 sec.
Apply 5 times the pickup current and the relay should trip between 3.9 and 4.3 sec.
Set the relay as follows:
Apply 0.9 times the pickup current into phase B and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 26.7 and 37.3 sec.
Apply 5 times the pickup current and the relay should trip between 2.4 and 2.8 sec.
Set the relay as follows:
Apply 0.9 times the pickup current into phase C and the relay should not trip.
Apply 1.5 times the pickup current and the relay should trip between 17.2 and 23.6 sec.
Apply 5 times the pickup current and the relay should trip between 1.7 and 1.35 sec.
Set the relay as follows:
9
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 10.86 and 12.25 sec.
Apply 5 times the pickup current and the relay should trip between 3.69 and 4.16 sec.
9-16
51P SETTINGS GROUP
Curve
Time Dial
51P SETTINGS GROUP
Curve
Time Dial
51P SETTINGS GROUP
Curve
Time Dial
51P SETTINGS GROUP
Curve
Time Dial
MIFII Digital Feeder Relay
INVERSE
10

9.15.5 ANSI VERY INVERSE CURVE

VERY INVERSE
10

9.15.6 ANSI EXTREMELY INVERSE CURVE

EXTREMELY INVERSE
5
INVERSE
10
9 RELAY COMMISSIONING

9.15.4 ANSI INVERSE CURVE

9.15.7 IAC INVERSE CURVE

GEK-106237P