208 Volt Transformers

[Mark Atom]

I looked on line for 208 volt trasformers, but have not found much.

Looking for a multitap 208 in 280 out transformer at about 120A so you can
make adjustments for low line voltage.

Also need a 208 in 120 out transformer at about 30A.

Can anyone point me in the right direction?

Thanks

Mark

 

[Charles Perry]

I looked on line for 208 volt trasformers, but have not found much.

Looking for a multitap 208 in 280 out transformer at about 120A so you can
make adjustments for low line voltage.

Also need a 208 in 120 out transformer at about 30A.

Can anyone point me in the right direction?

Thanks

Mark

on the 208 in 120 out about any 240 to 240 volt isolation transformer will
work. The primary and secondary windings are usually split so that you can
parallel or series them to make a 240V to 120V. With taps (which most have)
you can get 208 to 120v. Cutler hammer, square d, etc.

Charles

 

[Mark Atom]

These are single phase transformers you need?

Do you mean 208 in, 208 out? Maybe 240:240 45kVA would work OK for
that.

Are you sure you need a transformer to get 120V from 208V, maybe you
just need a neutral?

You could try giving some details of your existing service /
distribution system and what you are trying to accomplish, might be
worthwhile.

j

Ok, I'm not and expert on this subject, but here is what I'm trying to
do.

I have an input voltage of 208V. It is two phases of a 3-phase circuit
and a neutral. I want to convert this to 120v and only need about 4KVA

Mark

 

[Brian]

Acme makes both xformers.

 

[Stan de SD]

on the 208 in 120 out about any 240 to 240 volt isolation transformer will
work. The primary and secondary windings are usually split so that you can
parallel or series them to make a 240V to 120V. With taps (which most have)
you can get 208 to 120v. Cutler hammer, square d, etc.

Do a bit of shopping on Ebay, as you can typically pick up a dry transformer
in serviceable condition for 10-20 cents on the dollar. I even done oddball
stuff, like trying to get 380VAC (Japanese industrial spec) from 208 by
reversing a common 460 to 230VAC step down transformer and trying out
various combinations of taps. I was able to accomplish for a couple of
hundred bucks what would have been about $2500 for a specially wound custom
job.