To put it simply, we can get the amps from dividing the kilowatts by the product between 3, rms AC. Current (Amps)Įquivalent Amps and Kilowatts at 240V AC Equivalent ampere and kilowatt values at 240 volts. Three Phase AC Circuits kilowatts (kW) to ampere (Amps). You might also be interested in our amps to watts calculator.Įquivalent Amps and Kilowatts at 120V AC Equivalent ampere and kilowatt values at 120 volts. Thus, the power P in kilowatts is equal to the current I in amps squared multiplied by the resistance R in ohms, divided by 1,000. It’s also possible to convert amps to kilowatts using circuit resistance with this formula: ![]() How to Convert Amps and Ohms to Kilowatts This formula is correct for the power delivered by all three wires in the three-phase system, but if you’re considering one wire in the three-phase system, you’ll need to divide by three. Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF multiplied by 3, divided by 1,000. The formula to convert amps to kilowatts for three-phase AC circuits where the line to neutral RMS voltage is known is: This equation is correct when considering one pair of wires in the three-phase system, but when considering all three pairs of wires in the three-phase system, you would need to multiply it by three. Thus, the power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF multiplied by the square root of 3, divided by 1,000. If you have been looking for how to convert 1.5 kW to amps, then you have found the right article. For the sake of simplicity, let's assume the power factor (PF) is unity. 1.5 kW to Amps: Here’s everything about 1.5 kilowatts to amperes, including useful information, the formulas for DC and AC 3 phase and single phase circuits, as well as a power to current converter. Basic electrical theory tells us that for a single-phase system, kW (V × I × PF) 1,000. The formula to convert amps to kilowatts for three-phase AC circuits where the current, line to line RMS voltage, and power factor is known is: You can use constants that apply to specific single- and 3-phase voltages to calculate current (I) and kilowatts (kW). Three-Phase AC Circuit Amps to Kilowatts Conversion Using Line to Line Voltage Try our power factor calculator to get the power factor if needed. Thus, the real power P in kilowatts is equal to the current I in amps multiplied by the voltage V in volts multiplied by the power factor PF, divided by 1,000. ![]() The PF is a property determined by the AC frequency and the amount of inductive or capacitive elements in the circuit. Wire Circular mils 3 x 2 x x I x L / ( Allowable Voltage drop of source voltage ) Note: the Value of Specific resistance or resistivity of Conductor is used here for copper and aluminum is 11.2 and 17.4 respectively at 53° C (127° F) Also check the Good to know. The magnitude of both real and reactive together is called the apparent power, and the PF gives the ratio of real power to apparent power. Calculating Wire/Cable Size formula for Three Phase Circuits. ![]() P (kW) = 12 A × 120 V / 1,000 P (kW) = 1,440 W / 1,000 P (kW) = 1.44 kW Single-Phase AC Circuit Amps to Kilowatts ConversionĬonversion of amps to kilowatts for single-phase alternating current (AC) circuits using the current, RMS voltage, and power factor (PF) can be done with a slightly different formula.ĪC electrical power is composed of a real part, expressed in watts (W), and a reactive part, expressed in volt-amps (VA). HP to Three phase amps calculation:ĪC three-phase current I (A) in amps is equal to 746 times of the total power P (HP) divided by three times of the multiplication of power factor and potential across phase to the neutral voltage V (V) in volts.For example, let’s find the kilowatts of power for a circuit with 12 amps of current at 120 volts. Note: The single-phase AC current I (A) can be measured through the phase side only.Ī 10 HP AC single phase motor has 230 Volts of voltage flow with 0.86 power factor, calculate the current.ĪC Current = 746*10 / (230*0.86) = 37.71 Amps. VALUE, 1-PHASE, 3-PHASE WATTS (W), I X E X PF, I X E X 1.73 X PF KILOWATTS (kW). Single-phase AC current I (A) in amps is equal to 746 times of horsepower P (HP) in HP divided by the product of power factor and phase to the neutral voltage V (V) in volts.ĪC single phase current I (A) = 746 x P (HP) / (pf x V (V)) in Amps Learn More: Tank circuit resonance Calculation, Formula, ExampleĬalculate the current flow through the 1.5 HP DC motor which has the potential difference between positive and negative terminal of 400VĭC Current = 746 x 1 / 400 = 1.865 Amps.
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