论电铲高压电缆的漏电保护及故障查找问题

Current Leakage Protection and Breakdown Examination of Shovel's High-voltage Cable

露天矿电铲的高压电缆易发生接地短路故障，造成设备损坏或人身伤亡事故．为了防患于未然，可采用绝缘监视装置或电磁式漏电保持装置对电缆进行保护，本文对以上两种装置进行了较为详细的介绍．同时，还介绍了利用电缆探伤仪或直流电位计。

The high-voltage cable of shovel easy occures the short circuit breakdown caused bygroundconnection,thus causing equipment failure or personal casualty accident.In order to take prpventive meaures,the insulation monitor or the electric-magnetic current leakage protection device can beused to protect the cable.The above-mentioned two devices are presented in detail,at the same time,themethods of seeking cable breakdown by using the flaw detector of cable or the direct-current potentionmeter are presented.