#3. Motor must be rewound. As an Amazon Associate we earn from qualifying purchases. Mathematical equation: Three phase Amps = [HP * 746] / [E * %age Efficiency * PF * 1.73] Example: Determine the current flowing through a three-phase, 2 HP, 400-volt motor having an efficiency rating of 93% and a power factor of 0.9. Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Should all 3 phases of a motor draw the same amperage? 3) Calculate the kVa: kVa = 0.00173 x volts x amps. HP 746 Amps = 1 . Motor categories include washdown motors, IEC motors, furnace motors, explosion-proof motors, and farm duty motors, to name a few. On the right side, find the 260-psig condensing pressure and follow the curved sloping line directly left of this condition. Revolution Technology. Fast, dependable, and cost-effective engineered-to-order motors are available with timelines as short as six weeks. We're sorry. Login. A farmer has 19 sheep All but 7 die How many are left? As long as a motor's torque (i.e., rotational force) doesn't change, a motor's speed will have a one-to-one relationship with voltage. Resistance thru each winding would be very low so they may not have noticed any difference. Questions About Becoming A Professional Member? I have electrical motor three phase, vibration symptoms in this motor as fallows; 1-Twice running speed is excitation with running speed at 1800 rpm. Starting current under load is probably 40+ amps. It is required by the NEC for circuits supplying single motors to have an ampacity rating of greater than or equal to 125% of the full-load ampacity rating of the motor. Hathaspace Smart True HEPA Air Purifier Reviews, 4+6 Best Whole-House Dehumidifiers (Ducted, Portable), 4 Quietest Dehumidifiers (Best Bedroom Dehumidifiers): 52.1 dB Or Lower, jump to 3-phase kW to amps calculator here, jump to 3-phase amps to kW formula and calculator here, check how long does it take to fully charge a Tesla with a supercharger, 3-Phase Power Calculator: Amps To kW (1st Calculator), 3-Phase Amp Calculator: kW To Amps (2nd Calculator), Understanding COP: Coefficient Of Performance Of Heat Pumps. Maintain proper quantity of grease in bearing, Deterioration of grease or lubricant contaminated. This motor is the perfect option for applications that require robustness, low . Note: Later on, we will also see how we can use the 3-phase current formula to design a 3-phase motor amps calculator. Terms of Service. air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. That's for low-voltage (3-phase) motors. You can insert these numbers into the calculator and see if you get the correct result. full-load currents varying with speed. Disconnect power from the blower motor by shutting it off at the disconnect box to the unit or unplugging the power source. This is a 480 v, 3 phase motor. I see that you have another 3-phase tool--tablesaw. Single-Phase Three-Wire Connection. Who makes the plaid blue coat Jesse stone wears in Sea Change? each-other, they should each draw the same current from each supply In practically the current rating may change and which is based in the manufactured standard as well as the what grade copper they are using to winding the motor. The rms current per phase is 100/10=10 amps. This is an 'unbalanced' 3 phase supply as far as the motor is concerned, and while it WILL work, the motor will develop less staring torque, less full load power, and more noise - and it WILL draw . VerticalScope Inc. All Rights Reserved. VEVOR Air Compressor Electric Motor, 5 HP SPL 3450 RPM, 208-230 Volt 3.1 KW Single Phase, 56 Frame 5/8" Keyed Shaft 60 Hz, Commercial-Duty CCW Rotation, 1.88" Shaft Length NEMA for Air Compressors. Overvoltage: Overvoltage can cause a normally loaded motor to overheat. Check to see if the three phase currents are balanced. Hi, I'm Kimberly. What is the moral lesson of at wars end by rony diaz? Iinrush=(code letter value X horse power x 1000) /( 3 X Voltage) You can ignore the square root of 3 if your voltage source is single phase. Remove end belts. Continue Learning about Electrical Engineering. I I I is the motor's full load amperage (in amps); P P P is the motor power rating (in watts); . Cheap Asynchronousmotors amzn.to/3ctrfzM As a partner of amazon I earn a little bit if you click on the link and buy something, 3 Phase Motor Load Calculation How to convert kW to Amps in 3 phase system HP to ampere electrical formula Hi I am Aayush Sharma Welcome to our youtube channel Electrical Dost. same current from the lines if the supply is okay and the windings Motors built for especially low speeds or high torques may have higher full-load currents, and multi-speed motors will have full-load currents varying with speed. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? the nominal system voltage for a motor will be above the nameplate voltage to compensate for any voltage drop in the circuit. Motor B] No-load = 8 amps On-Load = 40 amps. To simplify the whole thing, we have created 2 three-phase power calculators: To get an idea of how these calculators work, here is the screenshot of the 3-phase power calculator: Before we cover the basics, lets do a quick example to illustrate how calculating power on a 1-phase vs 3-phase circuit works. Conversely, the wiring may not be heavy enough, so there is an excessive voltage drop. For single-phase motors, all of which are low-voltage, a properly rated wall plug is a code-acceptable disconnect. (500W 40kW), Natural Gas BCF To MMBTU Calculator + MMBTU To BCF Calculator, MMBTU To MCF Conversion: Calculator + Chart (Natural Gas), MCF To MMBTU Calculator + Chart For Natural Gas, MCF To Therms Conversion Calculator + Chart (Natural Gas), Therms To MCF Conversion: Calculator + Chart For Natural Gas, How Much Electricity Does A Mini Split Use? Hi there, thanks for the heads up. It may not display this or other websites correctly. Much like core loss when viewed with a camera. Submerged Motor. Check for loose wiring connections. 114 guests). phase line, using capacitors to give phase shifts to simulate 3 Power draw is a function of flow rate and head. You can freely use this calculator to convert amps to kW in a 3-phase circuit. Because of the critical roles these motors play in any plant, a failure of the motor, inability to start, noisy operation and sundry other problems need to be remedied as soon as possible to avoid costly production downtime. i.e motor copper grade's quality will be grade1 > grade 2 > grade 3. identical, and provided they are fed with a supply that has the A three-phase motor must be wired based on the diagram on the faceplate. Unbalanced line current on poly-phase motors during normal operation. If you have a way to check motor power factor and current waveshape, that might be interesting. you dont really have high current). all about convert horsepower to amps & to convert motor hp to amps. In our case Red line lead connected to. It sounds like your no-load current is in the right ball park, but you should check the manufacturers data for actual no-load current. The windings in a three phase motor are For 'high-voltage'motors, all of which are 3-phase, much more powerful schemes are used. Convert BTU To Tons: How Many BTU In A Ton? Check that nameplate voltage is maintained. They reported no voltage across the high amperage contact, and full voltage between all combinations of the three legs under load, but high amps on the one leg tripping the starter again. If you have any questions about the 3-phase power calculator or the 3-phase amp calculator, you can use the comments below and well try to help you out. 3. Please enter the name by which you would like to log-in and be known on this site. Under the "PH" section it would list the number "1", for single phase. Locate fault with testing device and repair. Using this power formula, we can, for example, do a 3-phase motor kW to amps calculation. 3 HP 56H Frame Single Phase 3480 RPM WEG Electric Motor This listing is for a brand new WEG 3 horsepower air compressor motor model number 00336OS1CCD56-S, this motor is 208-230 volt, 13-12.7 AMPS, 60 Hz, 56H Frame, single phase, 5/8" diameter shaft, and 3480 RPM. The total KW of the heater is 15 KW. 245. Electricpete, you are correct. In the United States, for low voltage motors (below 600v), you can expect either 230v or 460v. You must be signed in to continue. The total power is 3000 watts. Might be indication reading the current (i.e. Foreign bodies which find their way inside the motor can dent bearing . As read more. This is an 'unbalanced' 3 phase supply as far as the motor The residual voltage @1800 rpm was 5.48 Volts. 4,500. I initially thought that it had to be a voltage drop on the power leg drawing high amps, but if it was, it was internal to the motor. I directed them to checking the voltage across the high amperage contacts under a load, and all three T lines to each other out of the starter. If you increase the load on the motor then t. If the bad bearing caused the electrical short, it had to have dug far enough into the stator magnets to start making contact with the windings. 3,844 satisfied customers. Heres the 3-phase power equation: P (kW) = (I (Amps) V (Volts) PF 1.732) 1,000. (Watts, kWh, $), 120-Gallon Propane Tank Dimensions (Horizontal + Vertical V-120), 1000-Gallon Propane Tank Dimensions (Length, Weight, Etc. -bottom:0;">208-230v/460v Usable at 208v 60hz at 64.0 Amps This item has been kept in storage for a few . They said the bearing had up to half an inch of side movement. The voltages listed below are standard rated motor voltages. Components Coils, Heaters, Motors, etc. Contact Us Locked rotor current is the same as the initial starting current, and is roughly three times the full load running current. are connected correctly, and have no shorts or opens in them.). In 3 phase star connected without neural, the unbalance current will lead to . For motor loads only. Some three phase motors can be connected to run off of a single From this dot, go directly and horizontally to the left; you should be at 44 amps. Please enter a valid email address for yourself. Taking the motor at an efficiency of 90% and a power factor of For example, if a 1 HP 3 4 pole 460 volt 1.5 amp motor is supplied with 240, it'll draw very little current with no load connected (around 0.5 or so), and it'll turn about 1799 RPM. Low-voltage is any voltage below 600 volts in the USA. Note: For synchronous-type motors with 0.9 and 0.8 power factor, there amperes listed in the table should be multiplied by a factor of How To Test and Check Single phase Electric Motors, How to Test a 3 Phase Motor Windings With an Ohmmeter, How to Calculate Inverter Power Rating and Inverter Battery Backup Time, Types of Earthing Systems Used in Electrical Installations, How to Measure Electric Motor Insulation Resistance, How to Calculate Synchronous Speed and Slip of AC Induction Motors, Resistance and Reactance per km of Copper and Aluminium cables, How to Install and Wire a Photocell Switch in a Lighting Installation, Check to see that power supplied agrees with nameplate specifications and load factor, Check connections with wiring diagram supplied with motor, Open circuit in winding or control switch. It sounds like your no-load current is in the right ball park, but you should check the manufacturers data for actual no-load current. About this video- Dosto Aaj Ki Is Video Me Maine Aapko three phase motor load calculation Batane Ki Koshish Ki Hai Or Kuchh electrical tips jaise kW to HP convert, kw to ampere in hindi, circuit breaker selection, Electrical interview questions answers Share Kiya Hai Ummeed Hai Aapko Ye Video Bahut Pasand, How to check a 3 phase motor with a multimeter How to troubleshoot a 3 phase motor with a multimeter 3 Phase motor test How to check a 3 phase motor system How to check winding resistance on a 208-230/460 volt, 3 phase motor How to check resistance and short to ground for a 3 phase motor 3 phase motor troubleshooting How to check induction motor with multimeter Fluke 902 FC HVAC True-RMS Clamp Meter amzn.to/39wvwiK Milwaukee Cut 1 Dipped GLOVES L amzn.to/3s8H18O KNIPEX Tools Long Nose. I did high resolution and there is no side band which is confirmed there no winding problem. they should. For light and moderate motor loads. Mini split air conditioner electricity requirements. Already a Member? 4) Calculate the Kw: Kw = kVa x PF (Power Factor) x 0.01. High / low voltage, high amperage on 3 phase supply, voltage out of balance. Contact Supplier. Premium efficiency Super-E motors are less sensitive to overvoltage than are standard efficiency motors. Please enter a password for your user account. Remove old grease, wash bearings thoroughly in kerosene and replace with new grease. It may not display this or other websites correctly. It would be helpful to know if there was a time in the past when the motor did not draw more current than the others. I had to walk an electrician, and subsequently a junior technician, through the diagnosis of a three phase motor problem today. Police motor vehicle stops without cause are a violation of the Canadian Charter of Rights and Freedoms, Quebec Superior Court ruled Tuesday. It occasionally sets the digital protective relay into countdown mode because of varying load. SEER = (1 EER100% + 42 EER75% + 45 EER50% + 12 EER25%)/100, Total Heat (BTU/hr.) 230 volts motor - single-phase : 7 amps/hp; 230 volts motor - 3-phase : 2.5 amps/hp; 460 volts motor - 3-phase : 1.25 amps/hp; Always check nameplate information before designing protective devices, wiring and switch gear. Three Phase Motor Pulling High Amps on one Leg. Do note that if a 3-phase motor with lower voltage and lower power factor will draw more amps to produce the same power output. At least 80% of the time when current draws high current at our plant it is due to the pump or fluid system. The power per phase is 1000 watts. we took a buckett truck down the line to the substation and no loose or bad conections. About AMP You can use this example to see how the 3-phase power calculator works: A 100 amps motor on a 240V 3-phase circuit with a 0.9 power factor produces 37.41 kW of electrical power. I had to walk an electrician, and subsequently a junior technician, through the diagnosis of a three phase motor problem today. If the voltages were as follows; line 1 - line 2 = 468. line 2 - line 3 = 468. line 3 - line 1 = 478. Download and print Single Phase and Three Phase AC Power Chart. Power draw is a function of flow rate and head. 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Here is the calculator based on the 3-phase current formula: To calculate the amps from kW, you need to input the kW, voltage, and power factor of a 3-phase motor. The nameplate said 4. Imbalance in current drawn by 3-phase induction motor. You're preparing to drive a three phase low-horsepower motor rated at 10 amps. 1) Lockout the motor and check the motor winding from phase to phase using a multimeter. If the current unbalance exceeds 10%, you must take action to avoid motor failure and further assets damage. How about some vibration data, have any to share? Experiment #3: The motor was demagnetized following way: Slow spin (several RPM) and ~40 Amp single-phase current into 2 phases. Maybe I'll get a chance to look at it when I get back. Solution: Current = [2 * 746] / [400 * 0.93 * 0.9 * 1.732] = 2.57 Amps ; How many amps does a full load motor . There are exceptions to this requirement, which would include interlocks of two or more motors to prevent them from running at the same time. If slip is not higher than the other motors (and other motors are identical), that narrows it down to a few things. We are testing the pump off of a 3 phase genset and I checked it for 480 volt output and it is right on 480 volt. Watts have a direct relationship with volts, which can be expressed by the following mathematical formula: Watts = Voltage * Amps. I am programming an app for ordering 3 phase heaters, and I have an argument to resolve with a coworker. Wye or Star Connection. It brings to mind only a few far-out things like very high reactive current draw that Im not going to put high on the list (also see other comments after the list). If the compressor tag is faded or . Some smaller capacity units only require 110/120 volts. If it has been determinated/reterminated and has more than 3 leads, that open the possibility of a miswiring. Check for loose connections to line, to fuses and to control. I've got 70 amps on 2 phases and nearly 200 amps on one phase. if pf is known then using above formula. Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a parts function at the center of their design considerations. Single-phase to three-phase power calculation input requirement = The square root of 3 (1.732) x 10 amps = 1.732 x 10 amps = 17.32 Amps. You need to input the amps, voltage, and the power factor (its between 0 and 1, specific for each circuit): As you can see, the more amps and volts you have, the more powerful 3-phase electric motor you have. Fan motor pulling low amps. This technical article describes the basic principles of three phase systems and the difference between the different measurement connections that are possible. Motor is applied for the wrong application. Because this motor draws too high of amps we can only run 2 motors/pumps at a time. If you swapped line 1 and 2 then you could still have the same voltage readings and the drive would behave the same way. Use higher voltage on transformer terminals or reduce load. 732 cos ) how many amps does a 115 volt motor have? You also need thermal overloads if not internal to the motor. I have IM which is 55kw with full load current rating of 77.78 amperes, 415v 3-phase. the design duty was 1.9 l/s@ 70 kpa. I was going to install a 208 to 480 transformer. Sounds like a internal winding short. 15,819. 10 kW of power is required by an electric heater. You are using an out of date browser. Contamination. Nov 11, 2011. Uncouple and check no-load current. FLA on pump nametag is 7.1 amps Line 1 pulling 8 amps Line 2 pulling 2 amps Line 3 pulling 14 amps Stator wires 1 to L1, 2 to L2, 3 to L3 Stator wires 4 5 and 6 go to a thermal overload protection disk. Finally, you'll never receive email notifications about content they create or likes they designate for your content. similarly for 3 phase motor amps calculation, the current rating can be calculated by using the following formula. Some smaller capacity units only require 110/120 volts. / What next? This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. We have pulled the pump and trimmed the . R would be resistance measured in ohms. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. The #1 question asked by NEW MEMBERS. It appears that it had to be an internal short to ground very close to the point of connection for that leg, bleeding off 52amps while still supporting the. Typically 3 phase electrical systems are approximately 460 volts. Look for cracks near the rings. Item has been tested for proper operation and passed with ease. What is the best estimate of the capacity of a juice box? 3) Verify the fuses are properly sized based on the nameplate data and . Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Locate poor connections with test lamp. Check and correct bracket fits or bearing. A good motor should read less than 0.5 ohms. Gear? By joining you are opting in to receive e-mail. I have a 277v 1 phase pair of motors feeding a common duct. Visit the Terms of Use and Privacy Policy for this site. How is the flow and head measured and how accurate are themeasurements - if accurate and flow and head are as stated, I would be looking at the inlet side of the system to start with - the problem could be either, air leakage or restricted flow. Power measurements. About | Option: For DC, 1, 2, and 3, motors; Rated voltage (volts): for 3 phase voltages, line to line and line to neutral option is provided; Efficiency: given in percentage (%) Power factor: in percentage or unit (specified for single phase, two phase and three phase) Converting HP to Amps: If we divide 30 by 3 we get 10, the current in each phase of the three phase system. the pump is still running in 80% of BEP. Under the "V" section it would list "220" or "208", for 220 Volt applications. That could cause the motor to pull too much current. Please enter the name by which you would like to log-in and be known on this site. Such a motor has a 300.70 amp draw. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. air). Participate in over 40 different forums and search/browse from nearly 3 million posts. 43 A with single phase 230V; 25 A . There is one part of the situation that I am trying to work out for myself. Branch circuits that contain two or more motors must A shallow well pump might need a lot of wattage, and they can be quite loud. Also 5 HP three-phase motor takes 6.4 Amps. Voltage from B to C: 273.7. Ask Our Pros-Owner Assistance - NO DIY advice will be given. 115 volts motor - single-phase : 14 amps/hp. Fuses blown. Starting current under load is probably 40+ amps. Delta Connection. This motor is pulling 1.4a. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. It was a 15hp 480V motor with a mag starter and no drive. But worth double checking when you get this far down on the list. Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. Motor C] No-load = 2 amps On-Load = 40 amps. Thanks. Convert Amps To Watts (A to W): Simplest Calculator + Conversion Chart, What Size Heat Pump Do I Need? (Propane BTU Calculator), 4 Highest Efficiency Heat Pumps In 2023 (Highest SEER + HSPF), 500-Gallon Propane Tank Dimensions (Length, Width, Weight, etc. Check for faulty leads, connections and transformers. Just convert that wattage to kW; 1000W = 1kW. The squirrel cage brand is the most popular and they perform various tasks wherever they are applied. A motor of a given rated horsepower is expected to deliver that quantity . This is causing the thermal overloads to kick out, protecting the motor. The ARPA Zone/Open Membership Discussion Forums, http://www.tesengineering.com/electrs-dirty-power/. Open the blower compartment of the furnace or air handler. Could be anywhere from 20-60% of FLA. Aug 31, 2010. (+ How Many Watts), Convert kVA To kW With Power Factor (+ Easy Calculator). Adequate wire size. A week later and I'm back. 9,135. fourthindiana said: When an electric motor first starts running, the motor will draw approximately 5X the normal amp draw of the motor for approximately the first half second that the motor runs. Wye and Delta Comparison. Use a power meter, not an ammeter. Turn to Turn short? Accessories Pumps, Cooling Towers, Evap Condensers, etc, Components Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. For a better experience, please enable JavaScript in your browser before proceeding. Tools, Reference Materials, Resources and Basic Information for Learning Electrical Engineering, How to Test 3-Phase Motor Windings with an Ohmmeter, How to Calculate Inverter Power Rating and Battery Backup Time, A Guide to Understanding Solar Panels Power System Installations, Understanding the Technical Specifications on the Nameplate of Solar Panels, Understanding the Voltage - Current (I-V) Curve of a Solar Cell, How to Size an Off Grid Solar PV System for the Home. air), Latent Heat (BTU/hr) = 0.69 x CFM x gr. Shorted turns in a coil will cause higher amperage, but should also cause heat. Back to the main topic: This example is different from what I would use to describe how a three-phase motor uses power. Consult manufacturer for right application of motor. The actual site measuremnts are 1.51 l/s@ 65 kpa and drawing 1.9 amps. Figure 11 - A delta-connected motor that failed because of a single-phase condition, Line 3 is open. Components Coils, Heaters, Motors, etc. . Also check for signs of rub and other anomalies. Single-Phase wattmeter Connection. 4.38 Lakh. Reverse connections at motor or at switchboard. Answer (1 of 10): It delivers less power to the load. The calculator is now expanded to 480V to accommodate for high volt motor calculations. Possible solution: It is critical that the motor is kept as cool as possible, ensuring the operating environment is kept cool if possible will help prevent breakdowns. 460 volts motor - 3-phase : 1.25 amps/hp Always check nameplate information before designing protective devices, wiring and switch gear. = 4.5 x CFM x h (std. Please enter a valid email address for yourself. Especially when there are multiple pumps in parallel. Three phase ac motor fla (amperes) = (p [kw] 1000) / (v 1. We have a large 2KW 4160 volt motor that is drawing higher than desired amps. If this compressor was a single phase compressor, it would read as follows. 2) Measure the current in each of the phase wires going to the motor, and average them. Amps = . $12999 - $41999. Confirm that all control contacts are closing. Three phase induction motors are one of the most popular electric motors commonly found in processing plants or any manufacturing concern. We measure 41, 42, and 43 amps, giving you an average of 42 amps. I agree with Ron, the amps should have decreased if you trimmed and impeller. Cleaning and baking the windings may be all that's needed. If the voltage falls, the motor's speed will decrease by the same amount. Take your time, don't exceed the max starts per hour for that motor. What is the voltage of a three phase motor? 4. 7.5 Hp 3-phase motor takes 9.7 Amps, 10 HP, 3 phase motor takes 13 Amps. The 273.7 is a little high, but I don't believe this is causing your breaker to trip on startup. Replies and comments they make will be collapsed/hidden by default. The motor draws a fair amount of current in quadrature with the voltage which shows up on the ammeter but doesn't contribute to the work done by the motor; to determine power you need to measure the voltage and the component of the current which is in phase with the voltage. Depends on the voltage. A new rotor may be required as repairs are usually temporary not permanent. Yes. 0.37 KW 0.5 HP Three Phase Motor, 1440 rpm. Because this motor draws too high of amps we can only run 2 motors/pumps at a time. 1.1 and 1.25, respectively. Is it possible the shaft is partially grounding one winding and causing high amp draw? NEMA Motor Letter Table Three phase systems. Compressor pull high amps. Privacy Policy staring torque, less full load power, and more noise - and it WILL 3 Phase Motor Pulling Low Amps. The power supply available is 230V single or three phase. For a better experience, please enable JavaScript in your browser before proceeding. 25 amps. If you are running off 120 VAC, a 0.5 This includes induction-type Change to a control. This motor is on a circulating water system in a power plant. If it has been rewound since, that opens the possibility of an incorrect winding configuration. If the pump was bad/jammed wouldn't I be pulling high amps on all 3 phases, not just one? If a three-phase motor has been submerged in water but not energized, there's a good chance it won't need rewinding or replacing. Participate in over 40 different forums and search/browse from nearly 3 million posts. The calculator will dynamically calculate the current (amps) based on your inputs: You can use this example to check if youre correctly using the 3-phase power calculator for kW to amp conversion: Lets say we have a 200 kW motor on a 480V 3-phase circuit with a 0.8 power factor. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . Check load motor is supposed to carry at start. Motors range from fractional to 1000+ horsepower, up to 3600 RPM, and up to 4160 voltage. Heres how many amps does it draw: To see why we get different amperage on a 3-phase circuit, lets first check how these amps are calculated using the 3-phase power formula: Heres the simple formula we use to calculate power on a 1-phase AC circuit: Basically, we just multiply amp by volts.
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