GE GEK-106273L Instruction Manual page 134

RELAY COMMISSIONING
• Set the relay as follows:
51P Settings Group
Curve
Time Dial
• 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 23.4 and 31.8 sec.
• Apply 5 times the pickup current and the relay should trip between 3.1 and 3.6 sec.
• Set the relay as follows:
51P Settings Group
Curve
Time Dial
• 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 27 and 39 sec.
• Apply 5 times the pickup current and the relay should trip between 1.5 and 1.85 sec.
• Set the relay as follows:
51P Settings Group
Curve
Time Dial
• 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 3.88 and 4.27 sec.
• Set the relay as follows:
51P Settings Group
Curve
Time Dial
• 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 26.72 and 37.27 sec.
• Apply 5 times the pickup current and the relay should trip between 2.46 and 2.75 sec.
GEK-106273L
VERY INVERSE
1
9.16.3.
EXTREMELY INVERSE
0. 5
INVERSE
10
VERY INVERSE
10
MIF Digital Feeder Protection
9.16.2. IEC VERY INVERSE CURVE
IEC EXTREMELY INVERSE CURVE
9.16.4. ANSI INVERSE CURVE
9.16.5. ANSI VERY INVERSE CURVE
9-7