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.
漏泄电流会引发过流维护安装跳闸，使马达和变压器过热。
The leakage current will cause overcurrent trip to maintain installation, motor and transformer overheating.
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