1 概述该保护器是作为电源在缺单相或多相时 ,能够自动保护负载停止工作 ,达到保护机器的目的。目前 ,有好多单位的设备 ,应用三相电源的机器较多 ,由于电源负载过重常有缺相现象。为了保护机器 ,我们设计了这台保护器 ,该机具有体积小、造价低、使用广、维修方便等特点 ,能在 1 Overview This protector is used as a power source to automatically protect the load from stopping in order to protect the machine in the absence of single or multiple phases. At present, there are a lot of units of equipment, the use of three-phase power supply more machines, due to power overload often often lack of phase phenomenon. In order to protect the machine, we designed this protective device, which has the characteristics of small size, low cost, wide use, easy maintenance, etc.