Table 12 Electrical Formulae - FG Wilson Generating Set Installation Manual

Desired Data Single Phase
Kilowatts (kW)
Kilovolt-Amperes
kVA
I x V x Eff . x PF
Electric Motor
Horsepower
Output (HP)
Amperes (I)
When Horsepower
V x Eff . x PF
is known
kW x 1000
Amperes (I)
When Kilowatts
are known
kVA x 1000
Amperes (I)
When kVA is
known
Where:
V = Volts
I = Amperes
Eff = Percentage Efficiency
PF = Power Factor =
Table 12. Electrical formulae
Three-Phase
I x V x PF
1000
I x V
1000
746
HP x 746
kW x 1000
V x PF
kVA x 1000
V
Watts
I x V
3 x I x V x PF
1000
3 x V x E
1000
3 x I x V x Eff . x PF
746
HP x 746
3 x V x Eff . x PF
3 x V x PF
3 x V
23
Direct Current
I x V
1000
I x V x Eff .
746
HP x 746
V x Eff
kW x 1000
V