Expert Help on Mains Transformer?

brianco · 27th March 2012, 09:29 PM

I have a pair of identical EL transformers rated according to the makers label as:

Input: 440VAC
66VDC + 66VDC
265 Amp

My question is that assuming I can get 33VDC with 220 VAC, what will be the effective amperage with such a setup?

Many thanks.

DF96 · 27th March 2012, 09:37 PM

It will be about the same, as with a reduced primary voltage the main limit on current is heating which will be unchanged. So 265 amps.

Speedskater · 27th March 2012, 09:39 PM

Do we have a typo here?

That's 116000 VA (Watts)

But the Amps will stay the same, but the available power will drop to one half.

AndrewT · 28th March 2012, 04:21 PM

do you have 3phase power supply?
wire the 440Vac across two phases.

27th March 2012, 09:29 PM	#1
brianco diyAudio Member Join Date: Aug 2005 Location: Scottish Borders - Kelso; on the famous Tweed River!	Expert Help on Mains Transformer? I have a pair of identical EL transformers rated according to the makers label as: Input: 440VAC 66VDC + 66VDC 265 Amp My question is that assuming I can get 33VDC with 220 VAC, what will be the effective amperage with such a setup? Many thanks.

27th March 2012, 09:39 PM	#3
Speedskater diyAudio Member Join Date: Sep 2002 Location: Lakewood, Ohio	Do we have a typo here? That's 116000 VA (Watts) But the Amps will stay the same, but the available power will drop to one half. __________________ Kevin

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27th March 2012, 09:37 PM	#2
DF96 diyAudio Member Join Date: May 2007	It will be about the same, as with a reduced primary voltage the main limit on current is heating which will be unchanged. So 265 amps.

28th March 2012, 04:21 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	do you have 3phase power supply? wire the 440Vac across two phases.