Overview Dual power automatic transfer switches are newly developed miniature household power transfer switches. This switch is mainly used to test whether the normal or standby power supply is normal. When the normal power supply is abnormal, the backup power supply will work immediately to ensure the continuity, reliability, and safety of the power supply. Check the control power supply voltage: 50/60Hz AC220-240V. The connecting wire of the control circuit should not be too long. The cro-sectional area of the copper wire should be greater than 2.0mm. Wiring diagram of controller. 1.(Must be connected) Take zero line and fire line from the common control incoming line to connect AR (live wire) / AN (neutral line) 2. (Must be connected) Take zero line and fire line from the backup control incoming line to connect BR (live wire) / BN (neutral line) 3.The power indication signal is paive output, and the generator signal is taken (common) and (normally closed) 4.Connect the load end at the lower end of the (standby power supply side), Stepped wiring 5.There is an isolation board on the load. When wiring, first remove the isolation board, connect the load and then install the isolation board (it is recommended to connect the load first, then connect the backup power supply)