Find the current.Solution: I = [10 * 1000] / [200 * 0.8 * 2] = 31.25 AThree phase kW to Amps calculations involve a ration of 1000 times kW to the power factor times voltage and an additional factor 1.73 that represents an equivalent of √3 and is added because the circuit is three phase in nature.Example: A 3 phase 400 volt circuit has a 50 kW load connected to it. P (kW) = I (A) × V (V) / 1000. If your calculator doesn’t have a square root function, use 1.73 as an approximation of the square root of 3. Using the above example:Convert Ptotal from KVA into Kilowatts using the formula: P(KW) = P (KVA) x power factor. If we assume 8 hours of use and continuing with the example:kWh = P(KW) x hours of use = 86 KW x 8 hours = 688 kWhDwight Chestnut has been a freelance business researcher and article writer for over 18 years. For example, a three phase circuit using 25,000 watts of power and a line voltage of 250 will have a current flow of 25,000/(250 x 1.73), which is equal to 57.80 amperes. Three phase kW to Amps. AC single phase amps to kilowatts calculation He has published several business articles online and written several business ebooks. These cookies do not store any personal information.Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.This website uses cookies to improve your experience while you navigate through the website. Three phase kW to Amps. As an example, assume V1 = 300 V, V2 = 280V and V3 = 250 VDetermine the phase currents for each conductor. How to use this calculator: 1. Three phase power circuits are often used in power transmission lines and large electric motors because they allow lower line voltages and provide a smoother flow of electricity. Do this for all three conductors. How do you calculate the voltage drop for 238 KW 3 phase 415 V and length of circuit is 20 meters? if you don't have a scientific calculator just devide by 1.732 Connect a voltmeter between each conductor and neutral. We also use third-party cookies that help us analyze and understand how you use this website. However, the large systems that rely on three phase power circuits routinely come with readouts. My calculation was 11500/(1.732x400) = 16.6 Amps per phase ... 16.6 x 3 = 49.8 Amps, so i need a 50 Amp breaker. Due to the size of the systems, the reading may be in kilowatts rather than watts. Using the examples above:P1 = V1 x I1 = 300V x 130 amps = 39,000 VA or 39 KVA P2 = V2 x I2 = 280V x 120 amps = 33,600 VA or 33.6 KVA P3 = V3 x I3 = 250V x 110 amps = 27,500 VA or 27.5 KVACalculate the total 3-phase power, or "Ptotal," by adding the power of each phase together: Ptotal = P1 + P2 + P3. This category only includes cookies that ensures basic functionalities and security features of the website. Chestnut holds a bachelor's degree in electrical engineering from the University of Mississippi (1980) and a Master of Business Administration from University of Phoenix (2004). Enter the power in kW; 2. The system is operating at 0.85 power factor. The formula to find amps for a three phase AC circuit is a little different than the formula for a single phase circuit: Plus, check out the formula for the conversion with example calculations. Convert amps to kilowatts for AC and DC circuits with our amps to kw calculator, along with the formulas and examples on how to do the conversion. For example, most generators are 80% efficient. The power P in kilowatts (kW) is equal to the current I in amps (A), times the voltage V in volts (V) divided by 1000:. Find the amperes.The single phase and all other alternating current circuits introduce an additional concept of power factor in the denominator. Three phase kW to Amps calculations involve a ration of 1000 times kW to the power factor times voltage and an additional factor 1.73 that represents an equivalent of √3 and is added because the circuit is three phase in nature. You need also to know the resistance of the cable. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. The easiest way to calculate the power is if we start with a wye three-phase system because the calculation is simply three times the single-phase power. Find the current if the power factor is 0.9.Solution: I = [50 * 1000] / [400 * 0.9 * 1.73] = 80.28 AElectrical calculators provides powerful automation tools to boost your productivity.Electrical calculators is collection of tools, reference tables, formulas and electrical reference tables which helps you boost your productivity.Necessary cookies are absolutely essential for the website to function properly. For three phase circuits the power factor is the square root of 3. Kilowatts (kW) to Amps Electrical Conversion CalculatorCharge to Capacitance Electrical Conversion Calculator He became a member of the Society of Professional Journalists in 2009. Get hassle-free estimates from local home improvement professionals and find out how much your project will cost. Each conductor is 1/3 cycle out of phase with the other two. E.g: 5e3, 4e-8, 1.45e12. You need also to know the resistance of the cable. For a single phase AC circuit the formula to convert kilowatts(kW) to amps is: amps = (kW × … Calculate the total 3-phase power, or "Ptotal," by adding the power of each phase together: Ptotal = P1 + P2 + P3. Calculate amps.Solution: I = [20 kW * 1000] / [120 * 0.85] = 196 AHere the formula is identical to the previous one with the difference being a 2 is introduced in the denominator.Example: A 200 volt, two-phase circuit operating at 0.8 PF is loaded with 10 kW load. Make a note of the scale.

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