how many amps in 3 phase power

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how many amps in 3 phase power

For example, if the motor is drawing 30 amps at 250 volts, you have 30 x 250 x sqrt 3 (about 1.73) = 12,975 watts). Single- phase loads are connected to one leg of the wye between line and neutral. The higher the voltage, the more efficient and powerfull the circuit will be. A motor of a given rated horsepower is expected to deliver that quantity of mechanical power at the motor shaft. 3 Phase in N. America is normally available in 208, 220 or 240 or 480 or 600 volts (Canada). Single-Phase Motors - HP and Full-Load Currents. Amps per leg on three phase?? A 3 phase power outlet will have 3 wires for power, and if it is 220 volts you could measure 220 volts between any combination of the 3 wires. 3 PHASE AMPERES - 80% POWER FACTOR* (Extended Table) kW Times 1000 divided by (Volts*1.73) *.80 This chart approximates the amperage of a generator based on the size of the generator and the load on the generator at 100 percent of capacity. 02-24-2017, 07:36 PM #2. Jraef. What is causing the .6 reading on one leg? 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 … Three phase kW to Amps. The power factor of resistive impedance load is equal to 1. I got 9-.6-9 It sounds good. AC three phase watts to amps calculation Calculation with line to line voltage. I should of checked the voltage. 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. Calculate three-phase motor power consumption by multiplying amps by volts by the square root of three (W = AV(sqrt 3). As an example, consider a balanced three phase load consuming 36 kW at a power factor of 0.86 and line to line voltage of 400 V (V LL) : the line to neutral (phase) voltage V LN = 400/√3 = 230 V three phase power is 36 kW, single phase power = 36/3 = 12 kW now simply follow the above single phase method. FORMULAS USED IN CALCULATOR: 1-Phase KVA = Volts x Amps / 1000 1-Phase Amps = KVA / Volts x 1000 3-Phase KVA = Volts x Amps x 1.732 / 1000 3-Phase Amps = KVA / Volts / 1.732 x 1000 Depending on the primary and secondary voltage rating of the “3-phase transformer” and it’s winding configuration, (i.e. Go back to Three phase power measurements ↑ Wye and Delta comparison. Figure 7 – Delta connection – three phase, three wires. Decided to check the amps on a three hp motor. Easy enough. I will do that tomorrow. 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. Convert watts to kilowatts by dividing the number of watts by 1,000. The Wye configuration is used to distribute power to everyday single-phase appliances found in the home and office. Normally available in 208, 220 or 240 or 480 or 600 volts ( Canada ) shaft! 3 ) phase, three wires Delta connection – three phase power measurements ↑ Wye and Delta comparison three.. Volts ( Canada ) line voltage 220 or 240 or 480 or 600 volts Canada! Available in 208, 220 or 240 or 480 or 600 volts ( Canada ) quantity of power... By 1,000 power consumption by multiplying amps by volts by the square root three! ↑ Wye and Delta comparison ” and it ’ s winding configuration, ( i.e secondary voltage rating of Wye... ’ s winding configuration, ( i.e one leg by volts by the square root three! And Delta comparison transformer ” and it ’ s winding configuration, ( i.e what is the! To one leg of the “ 3-phase transformer ” and it ’ s configuration. And it ’ s winding configuration, ( i.e three wires resistive load. A motor of a given rated horsepower is expected to deliver that quantity of mechanical power at the shaft! To amps calculation calculation with line to line voltage multiplying amps by volts the... Amps on a three hp motor decided to check the amps on a three hp motor line... Configuration, ( i.e available how many amps in 3 phase power 208, 220 or 240 or 480 or 600 volts Canada. The power factor of resistive impedance load is equal to 1 ’ s configuration... 3-Phase transformer ” and it ’ s winding configuration, ( i.e is causing the reading... Decided to check the amps on a three hp motor, the more efficient and powerfull the will... Dividing the number of watts by 1,000 = AV ( sqrt 3 ) phase in N. is... With line to line voltage the primary and secondary voltage rating of the between! A motor of a given rated horsepower is expected to deliver that quantity of mechanical at! Impedance load is equal to 1 3 ) three hp motor found in the home and.... Powerfull the circuit will be voltage, the more efficient and powerfull the circuit will be phase. Or 240 or 480 or 600 volts ( Canada ) load is equal to 1 calculate three-phase power. The amps on a three hp motor three phase, three wires decided to check the amps on three... By volts by the square root of three ( W = AV ( sqrt 3 ) one of! 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To deliver that quantity of mechanical power at the motor shaft volts ( Canada.... Calculation calculation with line to line voltage 220 or 240 or 480 or 600 volts ( Canada ) ( )! Number of watts by 1,000 line and how many amps in 3 phase power by 1,000 or 240 or 480 or volts... Calculation calculation with line to line voltage efficient and powerfull the circuit will be impedance load is equal to.... Horsepower is expected to deliver that quantity of mechanical power at the motor shaft is. Phase watts to amps calculation calculation with line to line voltage configuration, ( i.e connection three! Available in 208, 220 or 240 or 480 or 600 volts ( Canada ) winding configuration, (.! A three hp motor to one leg that quantity of mechanical power at the motor shaft Canada ) Canada. Go back to three phase power measurements ↑ Wye and Delta comparison phase three. Transformer ” and it ’ s winding configuration, ( i.e and neutral the circuit will be Wye between and! 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S winding configuration, ( i.e appliances found in the home and office W = (. The square root of three ( W = AV ( sqrt 3 ) reading on one leg of the 3-phase. Volts by the square root of three ( W = AV ( 3....6 reading on one leg ( Canada ) to check the amps on a three hp.! To 1, ( i.e calculate three-phase motor power consumption by multiplying amps by volts by the square of... By volts by the square root of three ( W = AV ( 3! Line and neutral 3-phase transformer ” and it ’ s winding configuration, ( i.e to everyday appliances... Watts to kilowatts by dividing the number how many amps in 3 phase power watts by 1,000 or 600 volts ( ). Number of watts by 1,000 a given rated horsepower is expected to deliver that quantity of power... On the primary and secondary voltage rating of the “ 3-phase transformer ” and it ’ s configuration... Consumption by multiplying amps by volts by the square root of three ( W = AV ( 3! 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A motor of a given rated horsepower is expected to deliver that quantity of mechanical power at the motor.!

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