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  • Users: phstoon
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  1. phstoon

    Calculating generator size for 40HP Motor

    I have a customer who wants a generator to start a 40HP 480V electric motor. I used this formula Motor HP xKva per HP x (1000/(Volts x1.73)) = LRA So: 40x5.59x(1000/480x1.73)) 40 x 5.59 x (1000/830.4) 223.6 x 1.204 =269 Amps or 178Kw I then use a manufacturer's caluclating program and come up...

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