对煤矿高压供电系统选择性接地保护装置选用的几点看法

Views on the Selection of Selective Grounded Protective Devices for High Tension Power Supply System in Coal Mines

在煤矿供电系统中,地面变电所6kV高压馈出线上应设置有选择性的接地(漏电)保护装置问题,目前已取得了一致的意见。但在具体设计中选用哪种装置,即小电流接地系统有选择性的ZD-4型保护装置,还是6kVBLD-3型高压漏电保护装置,现尚有不同观点。本文就这个问题,提出一些看法。一。

Views on how to select the protective devices for coal mine power supply system are put forward in this paper. First of all, the features of power supply for coal mines and the indices of safe current are analyzed, on the basis of which, how to install the selective grounded protective devices for surface substation and the problems remained to be solved in the future are discussed.