Yueqing Longchen Electrical Co.Ltd.

automatic transfer switch is applicable to 3 phases 4 wires dual powergrid with AC 50Hz, rated voltage 400V and rated current up to 1250A.
When a power goes wrong, it will automatic connect one or several load circuits from this power to the other power automatically, to ensure normal power supply ofload circuits. And it keeps the original mini circuit breakers' overload and short circuitprotection functions. 
The product is suitable for industrial, commercial, high-rise and civil residential areas.