对较小的单相负荷可采用由微型接触器构成的双电源单相切换开关。

For comparatively smaller single-phase load, the duplicate supply single-phase transfer switch made of miniature contactors can be selected.

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本文着重介绍了用单相负荷电流检查零回路的新方法，并对这次事故情况进行了分析。

In this paper, a new method for checking the neutral circuit by using single phase load current is introduced. An analysis of this accident is presented.

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电力机车为波动性很大的大功率单相整流负荷，可能威胁电力系统的安全运行。

The electrified railway is a fluctuating high- power single- phase commutation load, which may threat power sys-tem security operation.

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