It has two power input lines, one is a common power supply, and the other is a backup power supply. The dual power switch is connected to the branch power switch downwards. The dual power control box has the following three functions

Automatic function, when a common power supply fails and loses power, the dual power supply automatically switches to a backup power supply for power supply

Manual function, selecting power supply through manual operation

Dual split function, when there is a fault on the load side of the site for maintenance, all power supplies are disconnected to ensure the personal safety of maintenance personnel