Automatic power switch Devices

Automatic power switching devices to the APPR type reserve are designed to restore consumers' power supply by automatically turning on the backup power source when the working power source is turned off, which leads to the blackout of consumer electrical installations with voltage up to 660 V AC of 50 and 60 Hz frequencies, and it is also possible to automatically turn on backup equipment when disconnecting working equipment, leading to a violation of the normal process.