Dual-power automatic switching switch is a device controlled by a microprocessor and used for starting switching between grid power and grid power or between grid power and generator power in a power system, which can make the power supply supply from a continuous source. Series of dual power supply, in case of sudden failure or power failure of common power, it will be automatically put into the standby power supply through the switch of dual power supply (the standby power can also be supplied by generator under small load), so that the equipment can still operate normally. The most common ones are elevators, fire fighting, monitoring, lighting, etc. Color: black/white net weight (product itself) : 3.205kg Product size: 243(with handle 283) mm*136mm*114mm