transformer question

tiagor · 29th January 2004, 11:31 AM

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

maylar · 29th January 2004, 01:58 PM

40 VA total, yes.

40 VA/ 48 volts = .83 amps bridged
40/24 = 1.6 amps CT

dulel · 31st January 2004, 05:18 PM

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.

29th January 2004, 11:31 AM	#1
tiagor diyAudio Member Join Date: Jan 2004 Location: Malveira	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

29th January 2004, 01:58 PM	#2
maylar diyAudio Member Join Date: Jun 2003 Location: Connecticut	40 VA total, yes. 40 VA/ 48 volts = .83 amps bridged 40/24 = 1.6 amps CT __________________ dave

31st January 2004, 05:18 PM	#3
dulel diyAudio Member Join Date: Jan 2004 Location: belgrade	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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