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Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
What would be the point? All transformers have losses, so at the very least this would double them.
I meant to add to my last post the colour coding of the sockets used on standard industrial 230V input isolation transformers in the UK, in case you don't already know it:
a yellow socket means output 110 - 130V
a blue socket means output 200 - 250V
a red socket means output 400 - 480V
all at 50 Hz in the UK.
So a standard industrial 230/230 UK isolation transformer will look like a heavy yellow box with a blue socket on it.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Tom Williamson wrote ...
yeh, i know the ones, i got a small 3.3Kva one next to me, i wanna get 1 or 2 10Kva ones hehe, run them together backwards for 415 volts ^^
Another option for you would be to use a 230/230 isolation transformer, followed by a 230/410V auto-transformer.
I had good results with just such a set up using a 230/410V auto from Tiger Toroids, when I was doing a lot of DC plasma electrolysis.
You will find on some industrial isolating transformers there is a widget allowing you either to Earth one side of the output, or have both sides floating with respect to Earth.
If you have both sides floating, then you can safely use a bridge rectifier across the output of an auto-transformer downstream, which is handy.
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Variac Rewind?
