In Rush Current on Generator Circuit Breaker

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gpipia

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I have a 800 Amp 480/277 Volt Main Service
I have a 400 Amp 480/277 volt feeder to a 225KVA transformer feeding buss duct
The building doesn't use much amperage on average 100 Amps per leg. 85KW
If I install a 150KW generator with 250 Amp Circuit Breaker will it trip due to inrush current from the 225kva transformer ?
Thanks
 
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