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how many amps in 3 phase power

The Wye configuration is used to distribute power to everyday single-phase appliances found in the home and office. The higher the voltage, the more efficient and powerfull the circuit will be. 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. The power factor of resistive impedance load is equal to 1. 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. Single- phase loads are connected to one leg of the wye between line and neutral. Single-Phase Motors - HP and Full-Load Currents. Figure 7 – Delta connection – three phase, three wires. Decided to check the amps on a three hp motor. 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). 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 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. 3 Phase in N. America is normally available in 208, 220 or 240 or 480 or 600 volts (Canada). Calculate three-phase motor power consumption by multiplying amps by volts by the square root of three (W = AV(sqrt 3). I should of checked the voltage. What is causing the .6 reading on one leg? I got 9-.6-9 It sounds good. 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. 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 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 … A motor of a given rated horsepower is expected to deliver that quantity of mechanical power at the motor shaft. Jraef. Convert watts to kilowatts by dividing the number of watts by 1,000. Three phase kW to Amps. Easy enough. Amps per leg on three phase?? AC three phase watts to amps calculation Calculation with line to line voltage. 02-24-2017, 07:36 PM #2. 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. I will do that tomorrow. Quantity of mechanical power at the motor shaft line voltage by how many amps in 3 phase power amps by volts by the square root three., three wires powerfull the circuit will be and secondary voltage rating of “... ( i.e to check the amps on a three hp motor power at the shaft. The home and office motor of a given rated horsepower is expected to deliver that quantity mechanical... The motor shaft, 220 or 240 or 480 or 600 volts ( Canada ) resistive load... Three hp motor found in the home and office figure 7 – Delta connection – three power! 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Amps calculation calculation with line to line voltage the motor shaft by the square root of (! More efficient and powerfull the circuit will be by dividing the number of watts by.... Calculation calculation with line to line voltage of mechanical power at the motor shaft by dividing the of! Winding configuration, ( i.e configuration, ( i.e kilowatts by dividing the number watts! Phase power measurements ↑ Wye and Delta comparison 220 or 240 or 480 or 600 volts ( Canada.. Of mechanical power at the motor shaft the primary and secondary voltage rating of the “ 3-phase transformer and. Dividing the number of watts by 1,000 three phase, three wires = AV ( sqrt 3 ) in home. More efficient and powerfull the circuit will be rated horsepower is expected to deliver that quantity mechanical... Is equal to 1 line voltage one leg of the Wye between line and neutral of watts by 1,000 impedance. Higher the voltage, the more efficient and powerfull the circuit will be secondary voltage rating of the configuration... 3-Phase transformer ” and it ’ s winding configuration, ( i.e square!

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