GZDW series is suitable for substations, power plants, industrial and mining enterprises, electrified railways and high-rise buildings of different voltage levels. It can be used as operating power and control power for high-voltage switches, relay protection and automatic devices. The system adopts the integrated design idea and consists of monitoring module, rectifier module, insulation monitoring module, battery inspection module, switch monitoring module and step-down module. It has advanced technology, reasonable configuration, intelligent measurement and control, and easy operation. It can communicate with the host computer and conveniently realize the four teleoperation functions of “telemetry, remote control, remote signaling and remote adjustment”. It is an ideal DC power supply device for unattended operation.