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hi guys,

I'm doing some troubleshooting on a Moeller motor starter and it's a bit out of my comfort zone.

After a power outage the transformer smoked really bad when I bypassed the fuse on sec. I guess there is a short somewhere, a wire touching the cabinet maybe... but really can't see it.

I'm confused why the transformer burnt when I bypassed the fuse as I can't see any short in my control box. Checked contactor and obviously there is power on L123 and nothing on Ts as the coil isnt energized.

what usually goes wrong after a power outage and possible a spike ?
Why would you bypass the fuse...It was blown, right? That is not the best way to troubleshoot something that you wanted to keep functional.
 
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