Protection of bus-tie circuit breakers: long time delay overcurrent and instantaneous overcurrent.
汇流排联络断路器保护：长延时过流、瞬时过流保护。
2
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。
3
Using the method of window moving in real time, the root mean square value of current of the last cycle was calculated as the criteria for instantaneous overcurrentprotection.