HP Generating Set Manuale Utente Scaricare il pdf (Pagina 26)

23

Table 12. Electrical formulae

Desired Data Single Phase Three-Phase Direct Current

Kilowatts (kW)

I x V x PF

1000

3 x I x V x PF

1000

I x V

1000

Kilovolt-Amperes

kVA

I x V

1000

3 x V x E

1000

Electric Motor

Horsepower

Output (HP)

I x V x Eff . x PF

746

3 x I x V x Eff . x PF

746

I x V x Eff .

746

Amperes (I)

When Horsepower

is known

HP x 746

V x Eff

.

x PF

HP x 746

3 x V x Eff . x PF

HP x 746

V x Eff

Amperes (I)

When Kilowatts

are known

kW x 1000

V x PF

kW x 1000

3 x V x PF

kW x 1000

V

Amperes (I)

When kVA is

known

kVA x 1000

V

kVA x 1000

3 x V

Where:

V = Volts

I = Amperes

Eff = Percentage Efficiency

PF = Power Factor=

Watts

I x V

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