GE TOV - Page 24

GEK-98834B
23
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Set the trip level to the minimum range of the setting, and the timing to instantaneous
mode (all switches to the left). Establish the connections as indicated in figure 10,
including the chronometer. Apply the rated voltage to the relay. Apply to points X and Y a
voltage higher that the trip level in the case of an overvoltage relay, and lower than the
trip level in the case of an undervoltage relay.
Check that the time indicated by the chronometer is less that 50 ms.
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Apply a fault and check that the results are in accordance with the following table:
SWITCHES TO RIGHT (SW2) Tmin (ms) Tmax (ms)
1 (top) 123 157
2 218 242
4 788 872
8 12158 13441
None 30 40