KW or HP to Current (AMPs) calculation with example. single phase motor & three phase Motor Current Calculation.
AC single phase kilowatts to amps calculation:
The phase current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by the power factor PF times the RMS voltage V in volts (V):
I(A) = 1000 × P(kW) / (PF × V(V) )
AC three phase kilowatts to amps calculation:
The phase current I in amps (A) is equal to 1000 times the power P in kilowatts (kW), divided by square root of 3 times the power factor PF times the line to line RMS voltage VL-L in volts (V):
I(A) = 1000 × P(kW) / (√3 × PF × VL-L(V) )
Horsepower (HP) is a measure of electric power equal to 746 watts (W). Converting horsepower to amps can be done in a few simple steps, or using this simple formula.
Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts
The first step to convert HP to amps is convert HP to watts. Since 1 HP is equal to 746 W simply multiply the horsepower by 746 for this conversion.
Watts = Horsepower × 746.
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