为避免该类事故的发生，采用新型的具有保护零线断线保护功能的断路器是非常有益的。
In order to avoid this kind of accident, the using of new circuit breaker with protection function of zero curve broken is extremely beneficial.
本文通过对三种不同接地保护系统工作原理的分析，指出实现零线和接地线应始终分开的正确方法。
It is the key point to judge whether the earthing protective system of an elevator can he approved. Present paper analyses the working principles of three diff...
本文通过对三种不同接地保护系统工作原理的分析，指出实现零线和接地线应始终分开的正确方法。
It is the key point to judge whether the earthing protective system of an elevator can he approved. Present paper analyses the working principles of three different...
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