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。
2
The project calculating the average and instantaneous soil heat flux is deduced from the heat transmission equation satisfied by the ground temperature.
从地温满足的热传导方程出发，导出了计算土壤平均和瞬时热通量的计算方案。
3
When welding current is fixed, some important information such as length and section area of welding cable, connection of ground wire can be shown by output voltage of instantaneous arc-striking.