kVA to Amps Conversion Calculator for Single and Three Phase Circuits

kVA to Amps conversion calculator is used to calculate current (amps) in single and three phase ac circuits. The formula is applied to find amperes in generators, transformers, and other alternating current circuits from the known kVA and operating voltages of the system.


Single Phase kVA to Amps

The current in 1 φ circuits is a ratio of 1000 times kVA to voltage.

Mathematical formula:

I = [kVA * 1000] / E

Example: Find the amount of electric current flowing through a 200 volt, 5 kVA generator.

Solution: I = [5 * 1000] / 200 = 25 A

Two-Phase kVA to Amps

The equation to calculate current in 2 φ circuits is identical to the 1 P with the difference of factor 2 in the denominator.

I = [kVA * 1000] / (E * 2)

Example: Find the amperage that passes through a 10 kVA, 2 phase circuit having operating voltages 250 V.

Solution: I = [10 * 1000] / (250 * 2)= 20 A

Three Phase kVA to Amps

The three-phase kVA calculation is the ratio of 1000 times kVA to 1.73 times voltage.

I = [kVA * 1000] / (E * 1.73)

Example: A 400 volt, 5 kVA 3 phase generator operates at full load. Find the current passing through it.

Solution: I = [5 kVA * 1000] / [400 * 1.73] = 7.23 A

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