zigzag conexion vs delta open

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EDISON

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ECUADOR
A customer has an electric load of 40kw, 1 phase, 220Vac,60hz. We have in our stock a genset of 70 kw, 3 phase,220/127Vac. The customer is asking us about re-connect the genset at open delta conexion. What is the loos of power with this re-conexion? This one is better that zig-zag conexion?
Where can I find information about it?
 

cpal

Senior Member
Location
MA
I'm not sure you can connect a genset open delta ( all three phases would need to be available ), but a open delta config will reduce the kVA rating by 58%+ -.

I believe a zig zag is used to derive a grounded circuit conductor from a 3 phase delta system which does not provide a phase with a mid point tap.
 
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