6 COMMISSIONING
Set the relay as follows:
Apply voltage as indicated on the table under the overvoltage setting level and verify that the relay does not trip.
Verify that the relay trips for the set voltage (with an admissible error of 5%).
CHANNEL
VI
VII
VIII
VI
VII
VIII
VI
VII
VIII
NOTE: All angles mentioned on the tables are delay angles, where a balanced ABC system would be composed by:
CHANNEL
VI
VII
VIII
GEK-113328A
NEG SEQ OV (47)
Function
Pickup Level
Trip Delay
Reset Delay
APPLIED VOLTAGE (V) ANGLE
65
0º
65
120º
65
240º
55
0º
55
240º
55
120º
45
0º
45
240º
45
120º
APPLIED VOLTAGE (V) ANGLE
65
65
65
G650 Generator Protection & Control System
6.14 OVERVOLTAGE ELEMENTS (59P, 59X, 59NH)
6.14.4 47 ELEMENT - NEG SEQ OV
ENABLED
50 V
2.00
0.00
TRIPPING TIME (S)
EXPECTED
NO TRIP
2
NO TRIP
0º
120º
240º
ADMISSIBLE
NA
[1.9–2.1]
NA
6
6-19