矿用智能化通用性选择性漏电保护馈电开关

Mine Intelligent General Selective Leakage Protection Feedback Switch

利用零序电压与零序电流相位判别原理 ,设计了具有纵横向选择性漏电保护的矿用通用型智能型真空馈电开关 ,由于采用电磁兼容性原理设计了测控微机与检测电路 ,使产品结构简单 ,运行可靠。

With an identification principle of zero sequence voltage and zero sequence current, a mine general intelligent vacuum feedback switch with a cross selection leakage protection is designed. The main switch can be installed on the main line for application and can be installed in the branch line for application. When an electric leakage occurred in the branch line, the branch switch in the branch line will break the electricity in order to have a cross selection leakage protection. When electric leakage occurred in the main line or when branch switch refused to action if electric leakage occurred in the branch line, the main switch will be in action to break the power to have a cross selection leakage protection. The control circuit base PC is designed with electric magnetic compatibility principle. With 20 core single plug, the circuit is connected with out facilities. Therefore the circuit is simple. In the electric power network with the switch, there is zero sequence voltage signal line and power break feedback signal line connected between the main switch and branch switch. Those feedback switches are used in many coal mines for a long time.