SSC JE Electrical Engineering 2011 Paper

Question : 136 of 150

Marks: +1, -0

During arcing ground conditions, the phasevoltage of the system rises to

15 times its normal value
10 times its normal value
5 to 6 times its normal value
$√ 3$ times its normal value

Solution:

Ungrounded system is one where the nutral is not connected to earth. Thus, neutral of ungrounded system is isolated. Arcing ground is an electrical phenomenon in which the voltage of faulty phase fluctuates due to capacitive charging current during arcing ground condition the phase voltage of the system rise to

√2

times its normal voltage.

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