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Old 18th Mar 2023, 7:42 pm   #3
kalee20
Dekatron
 
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,087
Default Re: Transformers in parrallel?

I wouldn't connect the transformers in parallel. One has 230V primary, the other 240V... so supplied with the same voltage, whatever it is, the secondary voltages will be different. And that'll lead to circulating currents.

If you connect each to a bridge rectifier, again they'll have different voltages so the higher voltage will do all the work, while the lower voltage output will never even turn on its diodes.

Both of those completely ignore the fact that the transformers won't have perfect regulation, so there's a current-limiting / sharing mechanism there. But it's rather undefined.

If you want to do it 'properly,' you'll get a decent transformer. If needs must and you're really stuck, do as you suggest but get an order off to RS, and until it arrives, keep a fan blowing over those transformers!
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