What is a dual power automatic transfer switch?

The dual power automatic transfer switch, as the name implies, automatically connects to the backup power supply through the dual power switch when the power is suddenly cut off, so that our operation will not be interrupted and can continue to operate. The purpose of the dual power automatic transfer switch is to use one main power supply and one backup power supply. When the main power suddenly fails or the power is cut off, the dual power switch is used to automatically switch to the backup power supply (the backup power supply can also be supplied by the generator under small load) so that the equipment can still operate normally. The most common ones are elevators, fire protection, and monitoring. The UPS uninterruptible power supply used by banks is also the same, but its backup is a battery pack.