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.
3-Phase Motor Amps Calculation: kW To Amps (2nd Calculator).3-Phase Power Calculator: Amps To kW (1st Calculator).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: 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. On a 3-phase circuit (with a 1.0 power factor), the 3-phase power calculator shows that the same 6 kW appliance draws 28.87 amps.On a 1-phase circuit, 6 kW draws 50 amps.To get an idea of how these calculators work, here is the screenshot of the 3-phase power calculator: Example of how 1st calculator works: A 3-phase motor that draws 90A and runs on a 240V circuit with a 0.8 power factor will produce 29.93 kW of electrical power.īefore we cover the basics, let’s do a quick example to illustrate how calculating power on a 1-phase vs 3-phase circuit works.Įxample: Let’s say we have a 6 kW air conditioner on a 120V circuit. You can jump to 3-phase amps to kW formula and calculator here.
We apply the classic 3-phase motor current calculation formula.