![]() You can freely use this calculator to convert amps to kW in a 3-phase circuit. 3-Phase Power Calculator: Amps To kW (1st Calculator) That one converts kW to amps in 3-phase circuits, very important in electric motor design. Note: Later on, we will also see how we can use the 3-phase current formula to design a 3-phase motor amps calculator. We can use this equation to design the 1st calculator: 3-phase power calculator (check below). It converts watts into kilowatts because we usually prefer to deal with kW instead of W.īecause we need to use the power factor to calculate the kW from amps, this formula is also known as the ‘3-phase power factor formula’. 1,000 factor: This is another constant.To be exact, we get a square root of 3 (√3). It comes from the derivation of this equation. 1.732 factor: This is a constant in the 3-phase power calculation.The higher the PF, the more kW a 3-phase circuit has. This accounts for the real/apparent power ratio and is sometimes expressed as RMS current. In the 3-phase circuit, current and voltage are not in phase thus the power factor will be anywhere between 0 and 1. If current and voltage are in phase, the power factor is 1. Power factor is defined as a ratio between real power and apparent power. PF: Power factor, it’s a number between -1 and 1 (0 and 1 in practice).The more volts we have, the more power we have in a three-phase circuit. V (Volts): Electrical potential, measured in volts.The more amps we have, the more power we have in a three-phase circuit. I (Amps): Electrical current, measured in amps.P (kW) = ( I (Amps) × V (Volts) × PF × 1.732) ÷ 1,000Īs we can see, the electrical power in the 3-phase AC circuit depends on: 1 kW = 1,000W.Ĭompared to this, the 3-phase power formula is a bit more complex. The ‘1,000’ factor is there to convert from W to kW we want the resulting power to be in kilowatts. ![]() Here’s the simple formula we use to calculate power on a 1-phase AC circuit:īasically, we just multiply amp by volts. To see why we get different amperage on a 3-phase circuit, let’s first check how these amps are calculated using the 3-phase power formula: 3-Phase Power Formula On a 3-phase circuit (with a 0.6 power factor), the 3-phase power calculator shows that the same 6 kW appliance draws 48.11 amps.H ow many amps in 3-phase power? At 1.0 power factor, the amps in 3-phase power in this situation is 28.87 amps. ![]()
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