9.16.3 IEC EXTREMELY INVERSE CURVE
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 27 and 39 sec.
Apply 5 times the pickup current and the relay should trip between 1.5 and 1.85 sec
9.16.4 ANSI INVERSE CURVE
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 36.2 and 51.3 sec.
Apply 5 times the pickup current and the relay should trip between 3.88 and 4.27 sec.
51G SETTINGS GROUP
Curve EXTREMELY INVERSE
Time Dial 0.5
51G SETTINGS GROUP
Curve INVERSE
Time Dial 10