For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrentrelay, 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。
2
The relay is made up of integrated circuits. The line instantaneousovercurrent protection and overcurrent protection are combined with the once 3-phase reclosure application to form a whole body.