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 Post subject: Re: Isolation Transformer Advice
PostPosted: May Sat 18, 2019 4:53 am 

Joined: Mar Sat 23, 2019 10:57 am
Posts: 43
Location: Lincoln Nebraska
Leigh wrote:
impalacustom wrote:
I bought a 400VAC Toriod brand medical isolation transformer...
Modern medical isos do NOT isolate the AC source. They only isolate the AC line from noise generated by the equipment being used.

The ones I've seen have a jumper between one side of the output AC winding and safety ground. This jumper can usually be removed, resulting in the isolation we need.

The one I bought is made by Toroid (, it has 2 primaries and 2 secondaries, there are 9 wires though (4 input, 4 output) and the last wire is for the capacitance coupling (static shield), it's not connected to the primary or secondary, it's a solid copper shield surrounding the coils. The secondary is completely isolated from the primaries like a true isolation transformer.

Don, the one I bought is exactly like that, except I just got the transformer and not the case as I want to do some other things with mine.

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