How to Calculate Three Phase Amps From Megawatts

Megawatt 3 phase power applies primarily to large power distribution systems. In fact, the unit of watts represent the actual power used by system after a percentage of the power is lost due to inefficiencies of the load. Therefore, the total power supplied by the power supply is higher than the actual power and is in the form of volt-amperes, or in this case, Megavolt-amperes or MVA. You need to know the MVA to figure 3-phase amps. To figure MVA from megawatts, you need to know the power factor associated with the load, which measures the level of inefficiency of the load.


    • 1

      Find the phase voltage, or "Vphase," associated with the 3-phase system. Refer to system specifications. For example, assume 4,000 volts, which is typical for power in the megawatt range

    • 2

      Find the power factor, "pf," of the load powered by the megawatt power distribution system. Refer to specifications of the load. A typical power factor for 3-phase loads is 0.8.

    • 3

      Find the total power delivered by the power distribution system in Megavolts-amperes or "MVA." Use the formula MVA = MW/pf where MW is the megawatt value of the system. For example, if MW is 20MW and pf is 0.8:

      MVA = 20/0.8 = 25 MVA

    • 4

      Calculate 3 phase amps, or "I", using the formula: I = (MVA x 1,000, 000)/(Vphase x 1.732). The 1,000,000 represents "mega" where 1 megavolt is 1,000,000 volts. Continuing with the example:

      I = (25 x 1,000,000)/(4,000 x 1.732) = 25,000,000/6,928 = 3608.5 amps.

Related Searches


  • Photo Credit Brand X Pictures/Brand X Pictures/Getty Images

You May Also Like

  • How to Calculate KVA to MVA

    How to Calculate KVA to MVA. Volt amperes are a unit used to describe the electrical load in engineering. ... How to...

  • How to Convert KVA to Amps

    Kilovolt-amperes (kVA) are a measurement of the amount of apparent power of an electrical circuit found in an electronic device or appliance....

  • How to Calculate Amps to KVA

    How to Calculate KVA to MVA. ... Kilowatts and amps are both different types of measurements in an electrical circuit. In order...

  • How to Convert Watts to KVA

    In electrical and electronic design, it helps to know how much power a device consumes, whether you measure power in watts or...

  • How to Convert KVA to KW 3-Phase

    Converting KVA (Kilo Volt Ampere) to a 3-phase KW (kilowatt) reading when kilo is equal to 1000 can be performed by executing...

  • How to Calculate Amps in a Three Phase Circuit

    When dealing with large and powerful electrical equipment such as transformers, it is important to be able to accurately calculate the amps...

  • How to Calculate KVA from KW

    Three-phase electric motors are used in industry and home emergency generators. All three outputs carry the same current, ... How to Calculate...

  • How to Convert Megawatts to Amps

    The number of watts within an electrical system is determined by the product of the voltage and amperage within the electrical system....

  • How to Calculate EVA

    ... salaries and advertising are all accounted for in this calculation. The formula for EBIT is: ... Market value added and economic...

  • How to Convert Megawatt Hours to Megawatts

    A megawatt hour (MWh) is a unit of energy. ... The formula used to calculate megawatt-hours is Megawatt hours (MWh) = Megawatts...

  • How to Convert Kilowatts to Megawatts

    A kilowatt is one thousand watts, while a megawatt equals one million watts or one thousand kilowatts. ... How to Convert Amp...

  • How to Calculate Volt Amperes

    How to Calculate KVA to MVA. Volt amperes are a unit used to describe the electrical load in engineering. Volt amperes can...

  • How to Calculate Transformer Volt Amps

    Most transformers change one level of voltage to another, but the size of the transformer depends on the amount of overall power...

Related Ads

Related Searches
View Photos

10 Weird Ways to Save on Taxes