Aerocare - Las Vegas 4490 Delancey Drive, Las Vegas NV 89103 Phone Number: (702) 257-2575
1 Automatically turn generator on and switch power to it when they detect a drop in line voltage; turn generator off when they sense the line power is restored.  Can be used with portable generators as long as the generator has an electric starter.
How relays work. Here are two simple animations illustrating how relays use one circuit to switch on a second circuit. When power flows through the first circuit (1), it activates the electromagnet (brown), generating a magnetic field (blue) that attracts a contact (red) and activates the second circuit (2).ere are two simple animations illustrating how relays use one circuit to switch on a second circuit. When power flows through the first circuit (1), it activates the electromagnet (brown), generating a magnetic field (blue) that attracts a contact (red) and activates the second circuit (2).