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

9 RELAY COMMISSIONING
Set the relay as follows:
51G 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 26.72 and 37.27 sec.
Apply 5 times the pickup current and the relay should trip between 2.46 and 2.75 sec.
Set the relay as follows:
51G 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 17.19 and 23.58 sec.
Apply 5 times the pickup current and the relay should trip between 1.14 and 1.34 sec
Set the relay as follows:
51G 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 10.86 and 12.25 sec.
Apply 5 times the pickup current and the relay should trip between 3.69 and 4.16 sec.
Set the relay as follows:
51G 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.
GEK-106237P
VERY INVERSE
10
EXTREMELY INVERSE
5
INVERSE
10
VERY INVERSE
10
MIFII Digital Feeder Relay
9.16 GROUND TOC ELEMENT (51G)

9.16.5 ANSI VERY INVERSE CURVE

9.16.6 ANSI EXTREMELY INVERSE CURVE

9.16.7 IAC INVERSE CURVE

9.16.8 IAC VERY INVERSE CURVE

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