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Old 17th May 2009, 12:13 AM   #1
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Default Silly question

I'm totally ignorant when it comes to voltage, current vac, va etc, etc and there is something I have not found an answer anywhere on the net.

I have a couple of 300VA 230V 2 x 22V toroidal transformers and I have moved to the USA. What happens if I connect them in a 110V mains? Will they not work at all? Will they become 150VA? Or what?
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Old 17th May 2009, 04:07 AM   #2
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Yes, they will work. You end up with a 150VA transformer, and the secondary voltage will be 2 x 11V.

The transformer will be running at 50% of its designed core flux, and will run quite cool. I wouldn't be too concerned about considering it a 200VA transformer; the core tends to limit capacity more than the winding current, especially in this case where the core will be cool.
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Old 17th May 2009, 05:13 AM   #3
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Thanks for your answer zig.

I'm glad they will work. However, I will have to use them in another project because I do need at least 18v on the secondaries.

I will have to sell them.

Regards

Antonio
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Old 17th May 2009, 05:09 PM   #4
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Just another question on the same subject.

If I connect the two trafos in parallel will I double the secondaries' output back to 22v??

Basically if the above is true, this way I can still use the trafos but in stead of having one per channel I will have one for both channels.

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Old 17th May 2009, 06:07 PM   #5
Mr Evil is offline Mr Evil  United Kingdom
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You can connect the primaries in parallel and the secondaries in series to get a single pair of 22V outputs.
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Old 17th May 2009, 07:17 PM   #6
star882 is offline star882  United States
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Don't forget that you can get 240v in the US by connecting from hot to hot.
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Old 17th May 2009, 08:59 PM   #7
DRNB is offline DRNB  South Africa
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You will have to connect the two secondary taps in series to get 22V.
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Old 19th May 2009, 12:53 AM   #8
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Many thanks for your answers. Although I'm doing y homework I will hae to ask more questions since a mistake could be dangerous.

Quote:
Originally posted by star882
Don't forget that you can get 240v in the US by connecting from hot to hot.
Could you or someone else explain what this means? I live in an apartment and have no access to the electricity board. Just to normal double (wall) sockets.

Also, I do not want to end up doing the wrong thing as explained here: http://www.avahifi.com/root/audio_ba.../ab1993-08.pdf


Quote:
Originally posted by DRNB
You will have to connect the two secondary taps in series to get 22V.
Is this asuming I do what star882 explained above?

Many thanks
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Old 19th May 2009, 01:37 AM   #9
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Ah, by the way, this is the way my transformers are wired.

http://www.airlinktransformers.com/t...ansformers.asp
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