480v 60hz to amps

480v 60hz to amps

This method relies on the quantity being sinusoidal and mains is typically quite distorted and if measured on the secondary of the average small power transformer it can have far worse distortion. 7 V would be the peak voltage that occurs as a positive peak and then a negative peak 60 times per second (60 Hertz). 33. 25 Amps - 50/60Hz 30-50 Amps: If your ampacity requirements fall between 30 and 50 amps, a 10-gauge wire is recommended. 732 Apr 16, 2008 · Re: Amperage change from 480v to 120v and from three phase to single. Capacity: Less than 300pF between input and output and output and ground. 06 Amps - 50/60Hz Reverse polarity. What is likely the full system power factor? 20 kVA Static Frequency Converter, 3 Phase 220V/380V/480V. There are 2 ways you can go about it from here. 2. It can power 277V single phase lighting loads. Power = 5A × 120V. 732 × cos ϕ) Three Phase AC Motor FLA (Amperes) = (P [HP] × 746) / (V × 1. Here’s the 3-phase power equation: Jan 12, 2023 · A standard three-phase power supply in the U. AnswerBot. Please note that this table is intended to be used as an estimate of how many amps a generator outputs during operation and is not an exact representation due to various factors that can increase or decrease this value. This will increase the motor output to approx. Phase to neutral voltage is 277V or below 300V. Current Load: The first step in determining the wire size for a 480V 3 phase system is to calculate the anticipated current load. 200 KVA Solid-state Frequency Converter - 480V 60 Hz Input to 400V 50 Hz Output - Mobile w/ Wheels Copper and Aluminum Wire - Max Amps vs. 28 amperes. Electrical Motors - Frame Dimensions Electrical motors NEMA frame dimensions. Its between 0 and 1. 04/17/2008 10:47 AM. 240V vs 480V Color Code 460V vs 480V. Firstly, rewrite the initial watts to amps formula into the amps to watts equation: P = 3 * V * PH * I, As long as all of the values have desired units, simply input them into the formula: P = 3 * 100 V * 0. AC single phase watts to amps calculation. This can be done by determining the total power consumption of the connected equipment and dividing it by the square root of 3 (1. 25 factor like this: Minimum Circuit Breaker Size = 12. ∙ 14y ago. As you can see, converting amps to watts is a fairly straightforward process. 3 kV Transformer amps. +1 773-869-1234 (7 AM - 6 PM CST) 1-phase motor amps calculation with power rating in horsepower (hp): Note that the motor rated full load current is specified on the motor datasheet and stamped on the motor nameplate. This means that the flux will be equal and so you will = 4. 75 hp 1 hp 1. 351μFc. 5 hp 2 hp 3 hp 5 hp 7. 3 A at 230 Volts. Oct 31, 2014 · To better understand this, let’s take a look at some basic motor theory below: 1. I(A) = 25 kVA × 1,000 220 V. We can’t use a 15A breaker because the breaker ampacity should be at least 15. SKU: HZ-50-3315. Shop and compare solar inverters. To convert watts to amps, use our watts to amps conversion calculator. Gabon (Gabonese Republic) 220 V. What is the value of the capacitor if there is a current flow of 32 amps? 177 µF 469 µF 351 µF 995 µF. If your load on the motor does not change, AND the motor was sized very close to the load requirements, you may end up overloading the motor. 82 Amps - 50/60Hz 3-Phase Delta Buck/Boost Step-Down Transformer - 480V Primary - 400V Secondary - 18. Includes Single-phase, Three-phase, Hz, # of wires, plug types and info on generator frequency conversion. These fractional HP motors come in sizes from 1/3 to 2 H. $ 1,274. Information and chart on voltages and frequencies (hertz) listed by country. For example, an induction motor at 0. EAN: 3471522076519. 18 Amps. For three-phase AC circuits where the line-to-neutral voltage is known, the formula to convert watts to amps is: I (A) = P (W) V L-N (V) × PF × 3. 15 KVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, General Purpose Transformer, Sand and Resin Encapsulated, 115 Degree C, Aluminum Windings, 60 Hz operation (50/60 Hz optional), Frame Size: FR180. It convert units from kw to amps or vice versa with a metric conversion table. 78 Amps 3 Phase 60 hz Motor Full Load Amps & Locked Rotor Current Estimate --Select HP-- 0. Motor HP: Filter 200 kVA static frequency converter, built-in step-down/step-up transformer, convert 3 phase 480V 60Hz to 400V 50Hz, 380V 50Hz in a single step. 67:1. 73) = 39. 1 kW = 1,000W. Long Description: A40 contactors are mainly used for controlling 3-phase motors and generally for controlling power circuits up to 690 V AC or 220 V DC. Jun 2, 2024 · The amperage in a circuit is determined by the voltage and the resistance in the circuit, not the frequency. Jun 13, 2024 · Below is the AC single phase amps to watts calculation formula used by our AC wattage calculator: P = PF × I × U. 75 Amps - 50/60Hz 3-Phase Buck/Boost Step-Down Transformer - 480Y/277V Primary - 415Y/240V Secondary - 156. Power factor (cosΦ). Our expert help has broken down your problem into an easy-to-learn solution you can count on. has a voltage rating of 480 V. P. 9. 00. This is the 277-600 volt range, and most commonly you’re dealing with voltages at 277/480. 09Amps. 8a x 1. Hence 1 kVAR capacitor bank shall give you 4. Enter the transformer rating and select the appropriate unit. Call Us. This chart estimates the output amperage of a generator based on the operating power and voltage. These units can be safely stored If this is meant as a method of measuring the rms value of a mains voltage then the accuracy of the result is really not great. Jul 15, 2008 · So back to your more likely situation of having a 460V 60Hz designed motor and applying 480V 50Hz. 59. Voltage and Amps 45 kVA three phase static frequency converter, compatible with 3 phase 208v/ 220v/ 380v/ 415v/ 460v/ 480v 50Hz/60Hz power system, output pure sine wave for testing and industrial equipment. 469μFd. In a single-phase AC system, amperage can be determined by multiplying kW x 1,000, then dividing the resulting figure by the result of volts x PF. kVa/kW Amperage Chart. The power is provided through a wire connection between the source and the consumer site regardless of the supply voltage. Current (I): Enter the the current in Amperes (A). For balanced loads, the phase current (I) in amps can be calculated by multiplying the apparent power (S) in kilovolt-amps by 1000. For example, if there are three 15-amp motors in the circuit, the ampacity rating of the wire feeding the 5,078. 480-240 Volt 3 Phase Transformers. VFDs work with three-phase vector (inverter) motors in constant-torque and variable-torque . The transformerless, three-phase Fronius Symo Advanced 20. The “split phase” Radian GS8048A will not work in 3-phase applications as each The overall voltage is specified as Volts, Root Mean Square, VRMS. In industry, there’s frequent debates if these two voltage levels imply the same thing. • Delta Primary to Wye Secondary. This formula calculates the current for all three 3-phase power calculator parameters. Jun 12, 2024 · To calculate that value, we: First convert 50 kVA to 50,000 VA by multiplying 50 kVA by 1,000. Jul 31, 2023 · Power = Current × Voltage. What is the value of the capacitor if an ammeter shows a current flow of 32 amps?a. • UL & CUL Listed / CSA Approved. 4. When you need immediate help, call us! Our average wait time is under 1 minute. Amps refers to the capacity for work that is available from a specific circuit. 3 kV Transformer Amps Amps Rating: 208V-240V, 60Hz Open Panel. 333 amperes. • Energy Efficient 3 Phase Step Down Transformer (480 to 240) • UL & CUL Listed / CSA Approved. Example 2: Let we calculate the reactive current for 25kVAR capacitance bank which is connected to three-phase at the line voltage of 415 volts. 63A. where: P – Power or wattage; PF – Power factor; I – Electrical current; and. Electric Motors - 480 Volt Wiring 480V electrical motor wiring data - NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp. Catalog Description: A40-30-10 400-415V 50Hz / 480V 60Hz Contactor. 50-70 Amps: When dealing with ampacity requirements between 50 and 70 amps, an 8-gauge wire is the recommended choice. 30kW Soft Starter - 40 HP, 60 Amps - 480V (430-525V) - 3PH Delta, 3-Wire - 50/60 Hz See Answer. • Energy Efficient 3 Phase Transformer. The contactors can also be used for many other applications such as This transformer calculator helps you to quickly and easily calculate the primary and secondary full-load currents of the transformer. To calculate the amperage, you The motor FLA calculator uses the following formulas: Single Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × cos ϕ) Single Phase AC Motor FLA (Amperes) = (P [HP] × 746) / (V × cos ϕ × η) Three Phase AC Motor FLA (Amperes) = (P [kW] × 1000) / (V × 1. 5 hp 10 hp 15 hp 20 hp 25 hp 30 hp 40 hp 50 hp 60 hp 75 hp 100 hp 125 hp 150 hp 200 hp 250 hp 300 hp 350 hp 400 hp 450 hp 500 hp --Select Voltage-- 200 VAC 208 VAC 230 VAC 460 VAC 575 VAC 2300 VAC 4000 VAC Examples for Transformer Amps calculations 225 kVA, 3. Branch circuits that contain two or more motors must have wire in which the ampacity rating of the wire must be at least 125% of the full-load current of the largest motor, plus the sum of full-load currents for the rest of the motors. 1 HP), 50 Hz, 400v AC, set the motor Hz in the VFD to 60, then the Motor Voltage to 480v AC. 15 kVA three phase 380V/400V/415V to 460V/480V frequency converter, easy converting 208V - 240V to 380V in one step, output single phase or three phase with pure sine wave, supply the electronic instrument with high quality electricity. above sea level. 5,208. Feb 17, 2022 · To convert watts to amps based on DC kilowatts, simply multiply kW x 1,000, then divide the result by the number of volts. Flip the switch to reverse the magnetic current and release your electromagnet's hold. I(A) = 1000 × P(kW) / (PF × V(V)) The phase current I in amps (A) is equal to 1000, multiplied by the power P in kilowatts (kW), divided by the power factor PF , multiplied by the RMS voltage V in volts (V). 3 phase 5 kVA isolation transformer is designed to step down/ up the voltage 480V to 400V, and widely used in various power supply sites with frequency 50Hz or 60Hz. don't forget to multifply the volts by 1. 8a then your 3ph kva is 480v x 66. 70 Amps - 50/60Hz AC to DC Electromagnet Transformers. Power = 600W. Just like 120/208 means that between hot and neutral you have 120 volts, and between two hots you have 240 – in a 277/480 service the voltage between hot and neutral is 277 and the voltage between two phase (hot) conductors is 480 volts. Amps Rating: 480V, 60Hz NEMA 1 / 2 & NEMA 3R. 3. A 480 3 Phase Wye power system is called 480V 3 Phase 4 Wire and 480Y/277V. V. Gauge Maximum current in copper and aluminum wire. Volts x Amps = Watts (Hp). 185kW Soft Starter - 250 HP, 370 Amps - 480V (430-525V) - 3PH Delta, 3-Wire - 50/60 Hz Here’s how we calculate the number of watts in a single amp: P (W) = 1 A * 120 V = 120 W. 1 A. This controls the motor's performance and reduces the amount of energy the motor consumes. 7, while the induction motor operates at a lagging power factor of 0. Mar 27, 2019 · So for your 460V 60Hz designed motors (motors designed to work on 480V systems are designed as 460V to allow for VD), the design V/Hz ratio is 460/60 = 7. This wire size can handle currents of up to 50 amps, making it suitable for medium-sized loads. Wire Size Calculator. Find the amperage rating of a transformer having 225 kVA and 500 V in case of single and three phase. 4. ***Reverse Feed Capable and for use with 3-Phase Source by connecting primary to any two wires of a 3-Phase System***. S. 75 kW (approx. What will happen over time to a motor rated at 400 VAC 50hz operating at 480 vac 60 hz? As long as you keep the V/Hz ratio constant, and you do not exceed the insulation voltage, and you do not overload the motor, it will be OK. -When the output is ≤120Hz, the load capacity can reach 100% of the rated value. Motors - Horsepower And Amps Of 120VAC 1 Phase 60hz Electric Motors. Apr 2, 2007 · thread237-182972. Thus, the following clarifies what each represents: According to NEMA, 460V three-phase is a “Utilization Voltage”, while 480V is a “Distribution 3-Phase Delta Buck/Boost Step-Up Transformer - 480V Primary - 600V Secondary - 24. 6 and draws 14. Electrostatically shielded. However, this calculator is useful when only the motor rating is available and an estimate of the current is required. 732) and the system voltage (480V). A = kW x 1,000. More answers. 20 kVA three phase static frequency converter, compatible with 3 phase 220v/380v/480v 50Hz/60Hz power system, output single phase or three phase, convert 60Hz to 50Hz for electric equipment. Question: An inductor with negligible resistance to a 480v 60 Hz line. 3 phase kVA to amps calculation formula Calculation with line to line voltage. 500 kVA, 3. The current I in amps is equal to the power P in watts divided by the product of line-to-neutral voltage V in volts, the power factor PF, and 3. 15amps. 1. Question: 3) a) A three phase induction motor and 3 phase synchronous motor are connected to a 480V system. For example, let’s find the current for a 220-volt circuit with 25 kVA of apparent power. User Instructions: Select the number of phases from the drop-down menu. Specification: -When the output is 400Hz, the load capacity can only reach 50% of the rated capacity. Apply our three-phase reactive current formula, Current in Amps I (A) = 1000 x 25 / (1. (PF x V) Electric Motors - 480 Volt Wiring 480V electrical motor wiring data - NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp. The 5kVA isolation transformer is high quality, three phase, 480V primary voltage and 400V secondary voltage, manufactured direct sale. 10,417 A. Choose from our selection of step-down transformers, including over 175 products in a wide range of styles and sizes. De-rating of 3. This compact dimensioned product is ideally suitable for applications in military and civil aviation Stewart isolation transformer. Jul 29, 2022 · Static Frequency Converter 50Hz to 60Hz Converters. Compared to this, the 3-phase power formula is a bit more complex. Variable frequency drives (VFDs) connect to a motor's electrical supply and vary the frequency of the electricity powering the motor. 15 The formula to convert kVA to amps is: [1] I (A) = S (kVA) × 1,000 V (V) This means that the current I in amps is equal to the apparent power S in kVA times 1,000, divided by the RMS voltage V . Setting the motor speed (RPM) using the 20% factor is also essential. Electric Motors - Efficiency Calculate electric motor efficiency. Kw to amps is a kilowatts to amps conversion calculator. A single capacitor is connected to a 480 volt, 60 Hz circuit. 73205 to obtain 120. 995μF A single capacitor is connected into a 4 8 0 V , 6 0 - H z circuit 15kVA 3-Phase 400v 50Hz/480v 60Hz Frequency Converter. 8 and a power-factor of 1. (300m) over 3,300 ft. Motor Current Ratings (Three-Phase AC) Motor current ratings based on kilowatt output at 120, 208, 240, 277, and 480 volts three-phase AC with an efficiency of 0. ) x speed (rpm) / 5252. Voltage - Enter the voltage at the source of the circuit. U – Voltage. 3-Phase Delta Buck/Boost Step-Up Transformer - 480V Primary - 600V Secondary - 11. P(W) PF × V(V) The power factor of resistive impedance load is equal to 1. 25 = 15. I (A) = S (VA) / V (V), which means that the current in amps is calculated by dividing the apparent power S by the voltage V in Volts. Ambient Operating Conditions. These 50Hz to 60Hz frequency converters are designed to supply 3 phase alternating current (AC) critical loads with high stability 50Hz or 60Hz frequency from a 50Hz or 60Hz input power source. Drawings can be accessed by clicking on the part number. )Magnetic strength (or Magnetic Flux) is proportional to Volts/Hertz. The two are unrelated. • Vibration Dampening System. -When the output is 400Hz, the load capacity can only reach 50% of the rated capacity. • Delta Primary to Delta Secondary. Using the formula above, you can also figure out how many watts of power there are in one amp, depending on the circuit voltage. 63 Amps. I have a device with the following AC / DC specs: 100—240V, ~2 amps,50—60 Hz 24V DC @ 6. 3kV = 68. How much current will flow in the circuit if the frequency is increased to 40Hz. The 300 series switch has proven its dependability in critical industries such as telecom, agriculture, municipal and medical. Frequency Converter, also named as AC power source, is an electronic device to convert fixed frequency (50 Hertz, 60 Hertz), fixed voltage (110V, 120V, 208V, 220V, 230V, 240V, 380V, 400V, 440V, 480V etc) to variable frequency (50 Hz, 60 Hz or 400 Hz adjustable) and variable voltage (adjust V/Hz in separate) to compatible with different countries' power system. 380 V. 177μFb. It also determines the turns ratio and type of transformer. Formula for calculating the single phase. Likewise, at 240 volts, 240 watts of power are consumed at 1 amp, and 480 watts are consumed at 2 amps. 5kva. In stock and ready to ship. 732 x 415) = 34. 3-Phase Delta Buck/Boost Step-Down Transformer - 480V Primary - 380V Secondary - 51. 1000 kW. and are available with a double reinforced welded 56H base or without a base in the round body style. Wiki User. In the case of single-phase: I = 225 * 1000 / 3. 43 Amps of current. Electrical Motors - Horsepower vs. lb. Also 3-Phase Delta Buck/Boost Step-Down Transformer - 480V Primary - 440V Secondary -114. RPM is based on the number of poles and the frequency. Finally, we divide 208. 5A × 1. The ARR-M series chargers will operate at 110% of rated DC output, continuously in ambient temperatures of 32°F to 122°F (0°C to 50°C) up to an altitude of 3,300 ft. Hi Brian, You are incorrect the 4 x 480v current for 120v is only true for 1ph - 1ph VA= VOLTS X AMPS. 50 Hz. Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on. 732 = 55. Output Amps, 130A @ 15. Can the Hz to Amps Calculator be used for both alternating current (AC) and direct current (DC P (kW) = I (Amps) × V (Volts) ÷ 1,000. Basically, we just multiply amp by volts. 52 amps / 35 kva - 160 kvdc isolation between input and output. Aug 13, 2019 · A lower voltage will have the motor draw more amps. 0-3 string inverter handles up to 26,000 Watt DC input and delivers 20,000 Watt AC output for commercial solar installations wth a 480V, 3-phase grid connection. I(A) = 113. 2V Rated Output (907710002) 60Hz designs with 50Hz information on 2, 4, 6 pole 1 – 125hp ratings; 2, 4, 6, 8 pole; Designed for both direct on line (DOL) and variable speed operations per NEMA MG1 Part 31. The “4 Wire” in 480V 3 Phase 4 Wire refers To calculate the size of the circuit breaker needed, we have to multiply the amp draw by 1. 3 A. 400/50 = 480/60, so the V/Hz is the same. The ‘1,000’ factor is there to convert from W to kW; we want the resulting power to be in kilowatts. This formula means that the wattage equals the power factor multiplied by the current multiplied by the voltage. 460V and 480V are common voltage levels for three-phase systems. 2; Simple F1 to F2 conversion on cast iron frame; Designed for longevity with 3 year warranty on premium efficient Super-E® motors; Class F insulation, 1. As we can see, at 120V, 1 amp is equal to 120 W. In case of three-phase: I = 225 * 1000 / (230 * 1. $7,189. Output Amps, 125A @ 15V Rated Output (907596) MILLER ELECTRIC Tig Welder, Maxstar 210 Series, 120 to 480V AC, 210 Max. The motor will turn 17% slower (50/60) so your HP capacity will drop by that much as well. 2 HP) with a corresponding increase in torque. These are technically more accurate because they refer to the neutral. com Mar 20, 2024 · The Hz to Amps Calculator utilizes the power (W), voltage (V), and phase angle (θ) inputs to calculate the current in amperes (A) using the formula: I = P / (V * sqrt (2) * cos (θ)), where P is power, V is voltage, and θ is the phase angle. The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF times the RMS voltage V in volts (V): I(A) =. )Torque is directly related to magnetic strength. $ 1,374. 73 for 3 phase power calcs (square root of 3) As for the frequency the motor will run at a different speed 50 / 60hz. C/D/E. Electrical DC Motors - Full-load Currents Full load amps in 120 and 240 volts electrical DC motors. See full list on inchcalculator. 3 Amps reactive. Enter the power factor of the load. Calculate the full load current of AC 4 days ago · We assume the power factor to be of the value 0. Output Power: 300 W; 1/2 HP; 1 HP; 2 HP. Input: 400 vac Delta / 3 phase / 47-63 Hz, Output: 3 Single Phase outputs each at 230v intended to be connected in Wye configuration yielding 3 phase at 400v between lines. Then, divide the result by the product of the square root of 3 and the RMS line-to-line voltage (VL-L) in volts. $7,791. 00 – $ 3,924. (1,000m). The single-phase Radian GS7048E inverter is the best choice. The peaks would NOT be RMS, but just volts, so sqrt (2) * 120 V = ~169. ∙ 2w ago. AC single phase kilowatts kW to amps calculation. 25 amps click to see device How to get power in Watts from this information? Also, for a second device: 100- This application note will discuss how to adapt OutBack Power 230V single phase inverters for 60 Hz 480V three-phase applications using 3-phase autotransformers in a step-down/step-up configuration. Most 480V power systems are a Wye configuration because. 3, 4. 0. For example, at 120 volts, 120 watts of power are consumed at 1 amp, and 240 watts are consumed at 2 amps. If we use the 220V voltage, we have this amps to watts equation: P (W) = 1 A * 220 V = 220 W. 92. Enter the information below to calculate the appropriate wire size. 50. 9 kW, (approx. Amperes - Enter the maximum current in amps that will flow through the circuit. 9 * 15 A = 4050 W, The outcome can be expressed as: "15 amps to watts, for the VLN equal Motors - Horsepower And Amps Of 230VAC And 460VAC 3 Phase 60hz Electric Motors. 5 KVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, General Purpose Transformer, Sand and Resin Encapsulated, 115 Degree C, Aluminum Windings, 60 Hz operation (50/60 Hz optional), Frame Size: FR177. )Horsepower = torque (ft. 5 kW Soft Starter - 25 HP, 37 Amps - 480V (430-525V) - 3PH Delta, 3-Wire - 50/60 Hz Available118 products. 6:1, which means it is 25% HIGHER than what the motor is designed for. If you have 480v x 66. At 220V, 1 amp is equal to 220 watts. Output Amps, 210A @ 18V Rated Output (907684) MILLER ELECTRIC Tig Welder, Maxstar 161 STL Series, 120/240V AC, 160 Max. Although Europe’s frequency is different than the 60 Hz we use in America, the The 3000 Amp ASCO 300 Automatic Transfer Switch 3 Phase 3 Pole 277-480v is perfect for applications where three phase 277-480 volt service is used and power interruptions are not an option. If you need a little help with checking your calculation, you can use our amps to watts calculator at the top of this page . Then divide 50,000 VA by 240 volts to get 208. Voltage (V): Enter the phase-to-phase () voltage for a 3-phase AC supply in volts. Also known as: 786680103537, S20L11S15N. Here is a full amps-to-watts conversion chart, with solved examples below: 480 W to amps: Here's how to convert 480 watts to amps, including the formula, useful information and a power to electric current converter. HZ refers to the rate at which the electrical current cycles between positive and negative. 64 A. Fully compliant with reduced low voltage 18. An ammeter indicates the current flow of 24amps . 333 amperes by √3 or 1. Single-phase voltages are usually 115V or 120V, while three-phase voltages are typically 208V, 230V or 480V. • Rugged Enclosures. 6°F (2°C) for every 990 ft. • Conduit knockouts for easy installation. 3-Phase Delta Buck/Boost Step-Down Transformer - 480V Primary - 460V Secondary - 32. [See More] AC Voltage & Frequency: 208-230/240V 60Hz; 460/480V/60Hz; International Voltages. Question: A single capacitor is connected into a 480V, 60-Hz circuit. The synchronous motor is operating at 8kVA, 60Hz, and a leading power factor of 0. 5 hp 0. 68 Amps -50/60Hz Product ID: 1SBL321001R5110. May 28, 2024 · A=1. If the apparent power in volt-amps is 10 VA and tension in line to line volts is 3V, what is the current in Amps? I (A) = S (VA) / V (V) I (A) = 10 / 3 = 3. Question: A single capacitor is connected to a 480 volt, 60 Hz circuit. 41 Amps. This voltage drops to 460 V due to line losses before being supplied to connected three-phase electrical equipment. 55 Amps - 50/60Hz 480-208Y/120 Volt 3 Phase Transformers. The number of amps at 240 volts and 60 Hz depends on the device or appliance you are using. We would like to show you a description here but the site won’t allow us. When you hit them with 480V 50 Hz, that supply ratio is 480/50 = 9. is nc ir rp up cn af xo ye kf