DOL starting motor, 2 dif sized txf's
DOL starting motor, 2 dif sized txf's
(OP)
Quick question:
If you use a generator (say 750kVA) as a power supply, stepping up through a 500kVA transformer with around 5% impedance, then try to DOL start a 180kW SC motor hooked up to a fan. Will the generator see a significantly lower startup current than if a 1500kVA 5% impedance transformer is used?
If you use a generator (say 750kVA) as a power supply, stepping up through a 500kVA transformer with around 5% impedance, then try to DOL start a 180kW SC motor hooked up to a fan. Will the generator see a significantly lower startup current than if a 1500kVA 5% impedance transformer is used?






RE: DOL starting motor, 2 dif sized txf's
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RE: DOL starting motor, 2 dif sized txf's
RE: DOL starting motor, 2 dif sized txf's
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RE: DOL starting motor, 2 dif sized txf's
I don't see many sophisticated breakers on a generator of that size. The breaker is probably a thermal magnetic which is tripping on instantaneous current.
The instantaneous (magnetic) trips may be set one notch higher.
Bill
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RE: DOL starting motor, 2 dif sized txf's
the generator has to trip as the overload will be more than 80%[minimum,depends on voltage drop].