220 kV主变无载分接开关故障技术分析及处理

The technological analysis and treatment of 220 kV main transformer no-load tap switch of failure

通过对某站220 kV主变无载分接开关解体检修,发现分接开关三相动、静触头上有不同程度的黑色碳化点,判断为产生乙炔的主要原因,经返厂大修合格。

Through the a 220 kV main transformer no-load tap switch overhaul, the different levels of black carbon in tap switch three phase dynamic and static contact were found, which was the primary reason for generating acetylene. After repairing, equipment became qualified.