HWQ4S-4P Dual Power Automatic Transfer Switch

The dual power automatic switch is used to switch between two power sources. It is divided into common power supply and standby power supply. When the common power supply is powered off, the standby power supply is used. When the common power supply is called, the common power supply is restored), if you do not need automatic switching in special circumstances, you can also set it to manual switching (this type of manual / automatic dual-use, arbitrary adjustment).