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Old 29th January 2004, 11:31 AM   #1
tiagor is offline tiagor  Portugal
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Question transformer question

Hi,

I really need a help on this one. I tryed searching for it but am still confused.

I have a couple of spare 24-0-24 trannies, rated 40VA.

Question one: what is the formula to know the maximum current that can be drawn? Is is straight from P=IV, which in this case would be 1.3A for each secondary winding, after DC conversion. Are this calculations correct?

Question two: the 40VA rating is for both the secondaries, right? or is it 40VA for each of the secondaries winding?

Thanks, feel free to me a bit

Tiago
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Old 29th January 2004, 01:58 PM   #2
maylar is offline maylar  United States
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40 VA total, yes.

40 VA/ 48 volts = .83 amps bridged
40/24 = 1.6 amps CT
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Old 31st January 2004, 05:18 PM   #3
dulel is offline dulel  Yugoslavia
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Default Re: transformer question

Question one: what is the formula to know the maximum current that can be drawn? Is is straight from P=IV, which in this case would be 1.3A for each secondary winding, after DC conversion. Are this calculations correct?

Question two: the 40VA rating is for both the secondaries, right? or is it 40VA for each of the secondaries winding?

40 VA is transformer rating, for all secondary windings it may have. DC voltage after conversion will be 33V, and output current for each rail will be 0.6A.
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