How to Measure the Power Consumption 3 Phase

By Raul Avenir, eHow Contributor

 
 
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Electrical power can be single phase or three phase.

Three-phase electric power is a method of electrical power transmission using three wires that carry the same current and have a constantly balanced power load that is generally used for motor-driven equipment such as fans, blowers, fans, pumps and compressors. Three-phase electrical power consumption is measured in kilowatt-hours, which is most commonly known as a billing unit for energy delivered to consumers by electric utility companies.

Things You'll Need

• Calculator

Instructions

1. • 1
     Calculate the wattage rating of the load or appliance that uses the three-phase electric current by multiplying the amperage of the circuit by the circuit's voltage. For example, a 50-ampere motor running on 340 volts AC (three phase) would have an equivalent wattage of 17,000 watts (50 x 340).
   • 2
     Multiply the wattage by the the square root of 3 --- 1.73 --- to get the wattage of the load in a three-phase electrical circuit. In the example in Step 1, multiplying 17,000 watts by 1.73 would result to 29,410 watts in a three-phase electric circuit.
   • 3
     Multiply the resulting figure in Step 2 by the number of hours you used the load or appliance to get the number of watt-hours. Divide the resulting watt-hours by 1,000 to get the number of kilowatt-hours consumed. In the example in Step 2, the wattage of 29,410 divided by 1,000 would give a result of 29.41 kilowatt-hours for every hour the appliance is used.