Automatic Transfer Switch

An automatic transfer switch (ATS) is a device that automatically transfers a power supply from its primary source to a backup source when it senses a failure or outage in the primary source.

This ATS has two modes and can be controlled manually or by Arduino.
The 220V power relay can be replaced by any relay according to the desired current.
Input DC12V source is managed to stand alone and does not depend on the Inverter source or Grid source.

1. Power Relay 4 pin DC12V 50A/100A/200A 4pcs
2. Control Relay 8 pin DC12V 2pcs and AC220v 1pcs
3. Pilot Lamp Red and Green DC12V 16mm
4. Terminal Block Din Rail EWIG IN-30BK 3P 50A 2pcs
5. Din Rail 10cm 2pcs
6. kWh meter AC220V 100A 1pcs
7. Lamp Switch (SW1) length 3cm width 1.3cm 1pcs
8. Switch (SW2, SW3) length 3cm width 1.3cm 2pcs

Switch type SW1 (ON-OFF), SW2 (ON-ON), SW3 (ON-ON).

The box is taped with a slot board that is glued with double-sided tape to the wall.
If the double-sided tape is not able to hold the weig