![]() How to calculate from power ( kW & HP ) to ampere ( I )? 1) Kilo watt (kW) to ampere ( I )įor 3 phase power supply kW = I x V x 1.732 x pfįor 1 phase power supply kW = I x V x pfĮxample : 1 unit compressor size rated 37 kw,415 VAC,3 phase and 80% pf,calculate the full load ampere?įirst we must convert from hp to kW using this formula :Īfter that use the formula kW to ampere :ġ unit induction motor power rated 25 hp,200 VAC,3 phase,90 % power factor,calculated the full load ampere. We cannot get the actual full load ampere because it depend on efficiency of motor.If electric motors have a higher efficiency rating,it will draw fewer amps, for example a 10 HP motor with a 60% efficiency rating will draw about 65 amps at 230 VAC compared to about 45 amps for a motor with a 80% rating. ![]() AC current is the 1000 times of the real power and divided by the multiplication of voltage and power factor. Mechanical horsepower, also known as imperial horsepower, is defined as approximately 745.7 watts (550 ft·lbf/s), while metric horsepower is approximately 735.5 watts (75 kgf·m/s). Simply multiply your amps figure by the voltage. To convert amps (electrical current) to watts (electrical power) at a fixed voltage, you can use the equation: watts amps × volts. The wattage (power produced) is calculated by multiplying the amps (current) by the voltage. ![]() For Single Phase: As we said earlier, we need to fill the power factor also. Definition: The unit horsepower (symbol: hp) is a unit of measurement of power (the rate at which work is done). The Watt’s Law formula is all that’s needed for this conversion. I (A) 1000 × P (kW) / V (V) In other words, Amp 1000 kW / Volts. ![]() This time i want share about how to calculated the full load ampere (FLA) of electric motor from their power rated.It not difficult if we know the right formula to get the answer.From this calculation we only can estimate the value of full load ampere. Current in Amp (A) is equal to 1000 times of kW and divided by Voltage in Volts. Generally for electric motor size,it rated by horsepower (hp) or kilowatts (kW) unit.We can recognize the electric motor size when refer to their kilowatts or horsepower.So from power (kW/hp), how we can know the full load ampere for electric motor? ![]()
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