Eaton Generator Manual de usuario Pagina 15

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15
Technical Data TD00405018E
Effective August 2009
Generator Sizing Guide
EATON CORPORATION www.eaton.com
Electrical Formulas
To Find Known Values 1-Phase 3-Phase
KILOWATTS (kW) Volts, Current, Power Factor E x I
1000
E x I x 1.73 x PF
1000
KVA Volts, Current E x I
1000
E x I x 1.73
1000
AMPERES kW, Volts, Power Factor kW x 1000
E
kW x 1000
E x 1.73 x PF
WATTS Volts, Amps, Power Factor Volts x Amps E x I x 1.73 x PF
NO. OF ROTOR POLES Frequency, RPM 2 x 60 x Frequency
RPM
2 x 60 x frequency
RPM
FREQUENCY RPM, No. of Rotor Poles RPM x Poles
2 x 60
RPM x Poles
2 x 60
RPM Frequency, No. of Rotor Poles 2 x 60 x Frequency
Rotor Poles
2 x 60 x Frequency
Rotor Poles
kW (required for Motor) Motor Horsepower, Efficiency HP x 0.746
Efficiency
HP x 0.746
Efficiency
RESISTANCE Volts, Amperes E
I
E
I
VOLTS Ohms, Amperes I x R I x R
AMPERES Ohms, Volts E
R
E
R
E = VOLTS
I = AMPERES
R = RESISTANCE (OHMS)
PF = POWER FACTOR
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