在为胜利油田研制海底电缆铺设装置过程中，曾发生升压变压器合闸时过电流跳闸问题。
In the process of developing submarine cable laying installation for Shengli Oil Field, a certain problem has occurred with overcurrent tripping during switching on of step up transformer.
本文对变频器的过电流跳闸和过载跳闸的故障原因进行了分析，并介绍了如何判断的具体方法。
This paper analyzed the reason of trip for over current and overload in VVVF. And introduced how to determine on these fault.
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。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
应用推荐