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True. Some guys have insulated the transformer from the chassis and that solves the problem of a case to ground short from happening if the insulation breakdown voltage is exceeded. That also may present a safety issue however by connecting the transformer case to ground thru a small low current fuse (one amp is great) it will serve an an indicator if the transformer has flashed over. I had to do that one time to a modulation transformer in a broadcast transmitter to prove or disprove that the transformer was breaking down under some conditions of modulation.

They don't run away. The insulation breaks down due to the higher voltage applied to them.

[QUOTE="Captain Kilowatt, post: 314807, member: 39"] True. Some guys have insulated the transformer from the chassis and that solves the problem of a case to ground short from happening if the insulation breakdown voltage is exceeded. That also may present a safety issue however by connecting the transformer case to ground thru a small low current fuse (one amp is great) it will serve an an indicator if the transformer has flashed over. I had to do that one time to a modulation transformer in a broadcast transmitter to prove or disprove that the transformer was breaking down under some conditions of modulation. They don't run away. The insulation breaks down due to the higher voltage applied to them. [/QUOTE]

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