3-phase generator [RE-wrenches]

[Christopher Freitas --- OutBack Power]

Many three phase generators can be configured for single or three phase 
output by reconnecting the windings of the generator.  I doubt that this 
would be something covered in the manual though.  You might check around 
for a motor rewinder guy (the older the better from my experience) and 
see what he says. You probably will need to put in a bigger single pole 
breaker (on some they just parallel the three poles together which is 
marginal).   

There is no three phase to single phase balancing transformer solution 
that I am aware of.  

If he is going to run large a large 3 phase load (such as a pump) along 
with the single inverter on one phase - then its OK.  

If the only load is the inverter - be careful to limit the draw to about 
1/3 of the generator's rating or you can overload a winding (which there 
is no temperature sensing to protect).  

Christopher


Nicholas Ponzio wrote:
> 
> We've got a possible off-grid client that already owns a 3-phase 
> generator
> (5kVA Onan). He only needs a single inverter. Any clean way to do this?
> 3-to-1 balancing x-former? If not, how bad is it for the generator to 
> only
> use a single leg?
> 
> Thanks for any input.
> -Nik

Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com  
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030  


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