Current (Amps)Įquivalent Amps and Kilowatts at 240V AC Equivalent ampere and kilowatt values at 240 volts. 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. Scan the row to the left and find the KVA and KW rating needed. Scan down this column to the current needed for your application (select the next higher current rating for more margin). It’s also possible to convert amps to kilowatts using circuit resistance with this formula: To find the KVA or KW rating (at 0.8PF) for your application, select the 50HZ three phase L-L (line to line) voltage level being utilized. 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: (line to line) voltage being utilized column is reached. To find the phase current rating if the 50HZ load KW or KVA is known, select the known KVA or KW rating on the chart. 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. COMMON VOLTAGE RATINGS: AMPS PER TERMINAL KVA. 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. For example, if you have a 220V (Linea-Line) refrigerator with a power factor of 0.8, and a current of 5 Amps, you should multiply 220 × 0.8x3 × 5 and obtain 1524.20. It is important to note that the above formula assumes that the motor operates at its rated power and efficiency. Therefore, the amp rating of the motor is 24.98 A. P (kW) = I (A) × V L-L(V) × PF × √3 / 1,000 Step 1: Multiply the corresponding voltage according to the formula by the power factor, the current and the root of three. We can calculate the amp rating of the motor as follows: Amp Rating (15,000 × 1000) / (3 × 415 × 0.85) 24.98 A. 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: 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. It means that the phase current in amps is calculated by multiplying 1000 by the power in kilowatts dividing the. 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. I (A) 1000 x P (kW) / (3 x PF x V L-N (V)). 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. 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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