Automatic Transfer Switches (ATS) are devices that automatically switch the power supply from the primary source to a backup source, such as a generator, in the event of a power outage or failure. They continuously monitor the incoming power and, upon detecting an interruption or drop in voltage, initiate a seamless transfer to the backup power source. This ensures uninterrupted power supply to critical systems and equipment, enhancing reliability and minimizing downtime in both residential and commercial settings.