8DA10型中压开关柜中35 kV电缆终端故障分析

Fault Analysis of 35 kV Cable Terminal in Model 8DA10 Medium Voltage Switchgear

介绍了一起8DA10型中压开关柜中35 kV电缆终端故障的情况,通过解体分析判断故障的原因,明确提出绝缘罩固定不良、螺栓突出过长等安装质量因素共同导致了空气绝缘的击穿,提出了电缆接线端子与GIS出线铜排的连接点在竣工验收和运行维护中应加强检查,并严格按工艺要求改进了预防措施。

The failure of 35 kV cable terminal in model 8DA10 medium voltage switchgear is introduced. The breakdown of air insulation is caused by installation quality factors such as improper fixing of insulation cover and protruding bolt through disintegration. The connection point between the cable connection terminal and GIS outgoing copper bar shall be inspected during the completion acceptance and operation maintenance, and the preventive measures shall be improved strictly according to the process requirements.