Application of SGZB-07A Power Protection Device in Xinqiao Coal Mine

The paper gave whole structure, working principle and technical characteristics of SGZB-07A power protection device. It introduced concrete application of the device in Xinqiao Coal Mine through aspects of timeliness and accuracy of leakage protection, good man-machine interface, easy to set and easy to realize communication function. The application result showed that the device can meet with requirements of automation of mine power protection.