Folks, I have a 2-outlet transformer I'd paid £3 for, battle worn, but quick clean and new lead and all was well. It worked fine for about 5 hours powering a hand held planer, and then died. No magic genie smoke, or obvious signs, but it pops the fuse in the mains plug every time I flick on the socket switch. I disconnected all internal wires, and used a multi-meter to check resistance and continuity; ohm reading of primary and secondary are single digit; no connection between either primary / secondary and metal laminates; center tapped earth is there. I don't have anything to test coil insulation with - so I'm guessing insulation somewhere on a winding has failed that only reveals itself when powered up?
I'm curious is there any other tests I could do on it to see what the fault is, just using a basic multi-meter?
Many thanks !
I'm curious is there any other tests I could do on it to see what the fault is, just using a basic multi-meter?
Many thanks !