摘要
介绍了装置的结构，工作原理及它的短路、过压和防雷击等多种保护功能。装置具有结构紧凑、体积小、价格便宜等特点，是乡镇小型煤矿供电网络较理想的安全装备。
This paper describes the composition and operation principle of this protectcrand its several protection functions against short circuit,overvoltage and lightning.Thisprotector is compact,small and cheap and is an ideal safety apparatus for the power sup-ply network of local small coal mines.
关键词
供电网络
煤矿
综合保护装置
power supply network, protection, zero sequence, control
