Dual-power automatic switching switch is a product developed by our company with the latest technology. It is suitable for dual-power automatic switching power supply system with AC 50Hz, rated working voltage 400V and rated current 1250 A. This product has the protection of overload, short circuit, over-voltage and short-phase. When the power supply fails, the switching device can complete the automatic switching between the common power supply and the standby power supply. It is widely used in hospitals, shopping malls, fire protection, banks, chemical industry, metallurgy, high-rise buildings and military facilities where power is not allowed to be cut off.