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Expert Help on Mains Transformer?
Expert Help on Mains Transformer?
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Old 27th March 2012, 10:29 PM   #1
brianco is offline brianco  Ireland
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Default 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.
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Old 27th March 2012, 10:37 PM   #2
DF96 is offline DF96  England
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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.
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Old 27th March 2012, 10:39 PM   #3
Speedskater is offline Speedskater  United States
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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.
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Old 28th March 2012, 05:21 PM   #4
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
do you have 3phase power supply?
wire the 440Vac across two phases.
regards Andrew T.
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