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TO FIND KNOWN VALUES 1-PHASE 3-PHASE
KILOWATTS (kW) Volts, Current, Power Factor E x I
E x I x 1.73 x PF
1000 1000
KVA Volts, Current E x I E x I x 1.73
1000 1000
AMPERES kW, Volts, Power Factor kW x 1000 kW x 1000
E 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 Frequency, RPM 2 x 60 x Frequency 2 x 60 x frequency
POLES RPM RPM
FREQUENCY RPM, No. of Rotor Poles RPM x Poles RPM x Poles
2 x 60 2 x 60
RPM Frequency, No. of Rotor Poles 2 x 60 x Frequency
2 x 60 x Frequency
Rotor Poles Rotor Poles
kW (required for Motor Horsepower, Efficiency HP x 0.746 HP x 0.746
Motor) Efficiency Efficiency
RESISTANCE Volts, Amperes E E
II
VOLTS Ohm, Amperes I x R I x R
AMPERES Ohms, Volts E E
RR
E = VOLTS I = AMPERES R = RESISTANCE (OHMS) PF = POWER FACTOR
ELECTRICAL FORMULAS
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