At the time of failure, no matter what kind of start state of voltage phase, the zero-sequence transient current has the characteristic of inverse phase.

在故障时刻，无论故障相电压的相位处在何种初始状态下，都有零序电流反向的特征。

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The general inverse time characteristic is introduced, and the setting principles of current and time when inverse time characteristic is scarce or voltage transformer breaks are provided.

介绍了普通反时限特性，并提供了缺乏反时限特性段或电压互感器断线时的电流、时间整定原则。

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This element is of proper shape and cross-section to carry rated current continuously and to melt in accordance with a specific time-current characteristic on heavy overload or short circuit.

此可熔断元件恰当的形状和横截面使其可连续通过额定电流，而对于严重过负荷或短路，按规定的时间一电流特性而熔断。

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