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29th January 2004, 12:31 PM  #1 
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 24024 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, 02:58 PM  #2 
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
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dave 
31st January 2004, 06:18 PM  #3 
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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