Time Overcurrent (51Ph, 51Pl, 51N, 51G) - GE Multilin GEK-113328A Instruction Manual

6 COMMISSIONING

6.11 TIME OVERCURRENT (51PH, 51PL, 51N, 51G)

Set the relay to trip for the protection element being tested. Configure any of the outputs to be activated only by the
protection element being tested.
Apply 0.9 times the Pickup current and check that the relay does not trip.
Apply 1.5 times the Pickup current. The relay should trip according to the time corresponding to its set curve.
Apply 5 times the Pickup current. The relay should trip according to the time corresponding to its set curve.
PROTECTION ELEMENT SETTINGS (51PH, 51PL, 51N, 51G )
SETTING
FUNCTION
INPUT
PICKUP LEVEL
CURVE
TD MULTIPLIER
VOLTAGE RESTRAINT
ELEMENT PHASE
51PH IA
IB
51PL IC
IB
51N IC
51G IG
GEK-113328A
VALUE
ENABLED
PHASOR (DFT)
1
MODIFY FOR EACH TEST
MODIFY FOR EACH TEST
DISABLED
CURVE TYPE DIAL
IEEE Ext Inv 0.5
IEC Curve A 0.05
IEEE Ext Inv 0.5
IEC Curve A 0.05
IEEE Ext Inv 0.5
Definite Time 2
G650 Generator Protection & Control System
6.11 TIME OVERCURRENT (51PH, 51PL, 51N, 51G)
UNIT
A
TIMES TRIPPING TIMES (SEC)
IPICKUP
EXPECTED
0.9 NA
1.5 11.34
5 0.648
0.9 NA
1.5 0.860
5 0.214
0.9 NA
1.5 11.34
5 0.648
0.9 NA
1.5 0.860
5 0.214
0.9 NA
1.5 11.34
5 0.648
0.9 NA
5 2.000
ADMISSIBLE
[11.00 – 11.60]
[0.600 – 0.710]
[0.750 – 0.950]
[0.200 – 0.300]
[11.00 – 11.60]
[0.600 – 0.710]
[0.750 – 0.950]
[0.200 – 0.300]
[11.00 – 11.60]
[0.600 – 0.710]
[1.900 – 2.100]
6-13
6