... directional mixing effect 定向交混效应 directional overcurrent protection 定向过流保护装置 directional overcurrent relay 定向过流继电器 ...
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Directional specific overcurrent protection 方向性
directional overcurrent relay protection 方向过电流继电保护
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For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
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