GZDW series DC power supply system is mainly composed of intelligent high-frequency switching power supply module, central monitoring unit, maintenance free battery, feed circuit, etc. It has many advantages such as light weight, small size, high efficiency, no pollution, etc. It is an ideal replacement of traditional DC power supply complete device. It is mainly applicable to small and medium-sized power plants, hydropower stations, various substations, switching posts and other fields using DC equipment, such as petrochemical, mining, railway, communication, metallurgy, high-rise buildings, etc., as the operating power supply for high-voltage switch opening and closing, relay shavings, automatic devices, signaling devices, and DC power supply for accident lighting and control.