220-440v transformer

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Subject Author Date
220-440v transformer Ignoramus23731 05-30-2008
Posted by Ignoramus23731 on May 30, 2008, 4:06 pm
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I would like to know what sorts of transformers are suitable for
converting 220v to 440v. Specifically, can I use a step down
transformer in the opposite direction, or will it not work at all due
to losses, etc?

My actual line voltage usually is 240-245 volts.

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Posted by Dave August on May 30, 2008, 4:37 pm
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Iggy,

Transformers are generaly "bi-directional" but work better in the direction
they were designed for.

I would try and get "full power" out of one backwards but it will work.
I've used 110-220 both ways and don "squirly" things with old 70Volt audio
transformers.

--.- Dave



>I would like to know what sorts of transformers are suitable for
> converting 220v to 440v. Specifically, can I use a step down
> transformer in the opposite direction, or will it not work at all due
> to losses, etc?
>
> My actual line voltage usually is 240-245 volts.
>
> --
> Due to extreme spam originating from Google Groups, and their
> inattention
> to spammers, I and many others block all articles originating
> from Google Groups. If you want your postings to be seen by
> more readers you will need to find a different means of
> posting on Usenet.
> http://improve-usenet.org/



Posted by Dave August on May 30, 2008, 4:50 pm
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Friggin fingers...
That's a typo.. I meant I WOULDN'T try and get full power.. I usualy derate
about 20%...

> I would try and get "full power" out of one backwards but it will work.

--.- Dave


> Iggy,
>
> Transformers are generaly "bi-directional" but work better in the
> direction they were designed for.
>
> I would try and get "full power" out of one backwards but it will work.
> I've used 110-220 both ways and don "squirly" things with old 70Volt audio
> transformers.
>
> --.- Dave
>
>
>
>>I would like to know what sorts of transformers are suitable for
>> converting 220v to 440v. Specifically, can I use a step down
>> transformer in the opposite direction, or will it not work at all due
>> to losses, etc?
>>
>> My actual line voltage usually is 240-245 volts.
>>
>> --
>> Due to extreme spam originating from Google Groups, and their
>> inattention
>> to spammers, I and many others block all articles originating
>> from Google Groups. If you want your postings to be seen by
>> more readers you will need to find a different means of
>> posting on Usenet.
>> http://improve-usenet.org/
>
>



Posted by Ignoramus23731 on May 30, 2008, 6:06 pm
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> Iggy,
>
> Transformers are generaly "bi-directional" but work better in the direction
> they were designed for.
>
> I would try and get "full power" out of one backwards but it will work.
> I've used 110-220 both ways and don "squirly" things with old 70Volt audio
> transformers.

What I am afraid, is that out of this 440-220 transformer, I would get
not 440v, but maybe 420 volts.

i

Posted by John R. Carroll on May 30, 2008, 6:09 pm
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Ignoramus23731 wrote:
>> Iggy,
>>
>> Transformers are generaly "bi-directional" but work better in the
>> direction they were designed for.
>>
>> I would try and get "full power" out of one backwards but it will
>> work. I've used 110-220 both ways and don "squirly" things with old
>> 70Volt audio transformers.
>
> What I am afraid, is that out of this 440-220 transformer, I would get
> not 440v, but maybe 420 volts.
>


Should be easy enough to check.
You also ought to be able to change the taps around to get plus or minus
five percent or so on the output.
I'm assuming a three phase IO here.

--

John R. Carroll
www.machiningsolution.com



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