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6.14 OVERVOLTAGE ELEMENTS (59P, 59X, 59NH)
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%).
ELEMENTS
59NH
Vn voltage is calculated as a sum of the phase voltages.
6
6-18
NEUTRAL OV HIGH (59NH)
Function
Pickup Level
Trip Delay
Reset Delay
INPUT
PICKUP LEVEL
TRIP DELAY
(VOLTS)
(SECONDS)
VI
120
2
G650 Generator Protection & Control System
ENABLED
120 V
2.00
0.00
APPLIED
TRIPPING TIME (S)
VOLTAGE (V)
EXPECTED
114
NO TRIP
132
2
132
2
6 COMMISSIONING
6.14.3 59NH ELEMENT
ADMISSIBLE
NA
[1.9–2.1 ]
[1.9 – 2.1]
GEK-113328A
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