Generac Power Systems 8 kW LP - Manual (Page 2)

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 Ohm, Amperes I x R I x R
AMPERES Ohms, Volts
E
R
E
R
E = VOLTS I = AMPERES R = RESISTANCE (OHMS) PF = POWER FACTOR