Transfer Switch Questions
My transfer switch stopped working. What's inside an automatic transfer switch? Mechanical/electric such as solenoid and contacts or is it electronic? Switch is integrated into back of main ele...
Forum Discussion
Yellermanx wrote:
What's inside an automatic transfer switch? Mechanical/electric such as solenoid and contacts or is it electronic?
The answer is either YES or BOTH (Both are correct).
There are large solenoids called contactors at this size but relay, solenoid and contactor are all the same thing.
And electronics that control them
Depending on the switch.... YOu have electronics that detect the generator running,,,, wait like 1/2 to 1 minute, then CLUNK transfer
Return to shore is instant when gernerator shuts down
Or you hsve two sets of contactors. one for SHORE /inverter and one for Generator / inverter In this case the electronics detect either shore OR generator and pull in the proper contactor.
Common issues
Burned wire/blown fuse
Bad board
Stuck (Generally welded) Solenoid.
This last can happen if you "Hot switch" between Shore and generator (Start the generator (or shut it down) While connected to shore power espically if you have the Air Conditioner(s) running.
