Transformer thermal protection

Depends on materials used in transformer construction and how carefully the wire is handled during winding. Most common failures are turn-to-turn shorts and turn to core shorts. Wire with heavy formvar will handle higher temperatures than solderable films. Damaged insulation is much more likely to fail.. Paul Mathews

Hi, I would like to protect a torroidal transformer for an audio project from over temperature. Would a 70-80oC resetting thermal trip be acceptable to pot with the transformer.

Thanks

Andy

----- My first crazyass idea if I had a problem like that would be to order a cheapo medical thermometer off ebay...Strip in down and tap into the sensor electronics to drive a shut down circuit. It'll be "cool" to see a digital display on a toroid. :) Can't recall med temp pen range.. D

That depends on what the insulating material is good for and how you bond it, thermally, to what you want to protect.

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"Andy"

Special thermal cut out do exist that can be manufactured into a toroidal trannies primary - but are not suitable for large VA numbers.

BTW

Potting a toroidal not a good idea if you are after a high power throughput.

........ Phil