GZDT series DC power supply cabinet power system is suitable for small and medium power plants and various sizes of substations, which used as operational power supply of the normal closing/opening, fault tripping, operation protection, signal bus of the high voltage circuit breakers DC electromagnetic operating mechanism, and used as DC power supply of the accident division, closing, lighting, control. The product has a novel and reasonable structure, and electrical scheme is complete, with a serious resistance, strong applicability, high level of protection features, can be used as replacement products.