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Old 11th October 2015, 02:07 PM   #1
Jaffrie is offline Jaffrie  Indonesia
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Default Noob Trafo question

Hi Guys

Need some tutorial. Have a 300Va 240v trafo with 40-0-40 ac out.
What is the actual current output per winding in amps

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Old 11th October 2015, 02:15 PM   #2
Mooly is offline Mooly  United Kingdom
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Its 300/80 which is 3.75 amps.

So you have two windings each rated at 3.75 amps and 40 volts. That is 150va per winding.
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Old 11th October 2015, 02:15 PM   #3
kaputt is offline kaputt  Germany
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Theoretical maximum is 3,75A. In practice a transformer doesn't put out current. The load draws current.
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Old 11th October 2015, 02:31 PM   #4
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The AC current rating doesn't translate to the DC current available after rectification and smoothing. After you rectify and smooth you'll generally get just under +/-60VDC unloaded.
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Old 11th October 2015, 02:47 PM   #5
Jaffrie is offline Jaffrie  Indonesia
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Thks guys for the advice
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