Check the listing for details. 60HZ Double Power Automatic Change-over Switch Generator Change-over Blue. Color: Blue, Condition: New. Listed at 54.99 USD. Description The sudden power cuts have caused a lot of distress. This double power automatic change-over switch will help you to solve this problem. When the common power supply is cut off, the backup power supply is supplied, and when the common power supply comes in, it is restored to the common power supply. The switching time is only 2 seconds. The automatic switchover saves you more trouble to maintain a continuous power supply. Key Features Excellent Performance: When a power supply fails, it will automatically connect one or more load circuits from one power supply to another to ensure the normal power supply of the load circuit. Fast Switching: It can easily switch between the main power supply and the standby power supply, and the switching time is only 2 seconds. High Assu.