[Amps] Transformer taps

[Steve Thompson]

On Monday 22 March 2004 00:16, Gary Schafer wrote:
> I have a plate transformer that has taps at 2000, 2500 and 3000 with a
> common center tap. Obviously made for a full wave rectifier to supply
> 1000, 1250 or 1500 volts rectified.
>
> I will use it with a full wave bridge.
>
> Question about the taps: Would there be any harm in using a lower tap on
> one half of the transformer different than on the other half?
>
> Meaning, use the one 3000 tap on one side  and the other side use the
> 2500 tap. This would allow voltages steps of 250 volts rather than 500
> volts for a tap change.
I can't see a problem but it might be worth checking the insulation between 
the winding and the frame - I've seen transformers where there's minimal 
insulation between the centre tap and the core, probably because there was an 
assumption of running the centre tap at ground.

Steve