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N line of low-voltage distribution system is isolated and disconnected

In Electronic Infomation Category: N | on November 02,2011

Power directly in the common ground of TN, TT system, under normal circumstances, the potential is essentially neutral ground potential, but for various reasons, it may bring danger to the ground. For example, a phase lead to the power circuit on the neutral ground potential rise, but there are insulated neutral package, not caused by caused by accidents. In order to avoid a large number of low-voltage utility grid power users, this failure is generally not trip, just as accidents hibernated. In another example, when lOkV substation high-side ground fault, the grounding potential rise also enable neutral line voltage with a fault, according to the network because lOkV no ground fault trip not only act on the signal, the up one hundred volts or so in the neutral line voltage fault is persis...

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