【Daily Topic】【Electrical Edition 20160527】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. Judgment of right or wrong: In a neutral-ungrounded system, it can operate for a short time in the event of a single-phase ground fault. ( )
Correct,√~~~~~~~~~~
True or False: In a neutral-ungrounded system, it can operate for a short period of time in the event of a single-phase ground fault. (Yes)
In a ungrounded system, when a single-phase ground fault occurs, the three-phase voltages remain symmetric. A duration of 2 hours is permitted when the grounding current is not greater than 20A; the fault current is the capacitive current of the 10 kV equivalent capacitor.