Xuchang Chang’an Technology Co., Ltd. is a high-tech enterprise, we specialized in producing intelligent power measurement and control equipment with automation systems. Our production includes microcomputer-based central signal alarm devices for power systems, online cable insulation monitoring systems, phase-to-ground protection devices, current/voltage monitoring relays, voltage loss current interruption timers, multifunctional power meters, energy transmitters, temperature/humidity controllers, and intelligent control systems. The company has developed comprehensive productions and service solutions suitable for power system complete set company.