# kVA to Amps Formula 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.

Enter apparent power in kVA, and voltage in volts. Choose the circuit type either single phase, two-phase, three phase (Line to Line) or three phase (Line to neutral) and current in amps will be computed.

Where in above

I = Current in Amps

kVA = Apparent power in kilo-volt amps

V = Voltage

VL-L = Line-to-Line Voltage

VL-N = Line to Neutral Voltage

List of Contents

## 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] / V

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

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

### 100 kVA to Amps

Example: Convert single phase 100 kVA, 3.3 kV to Amps

Solution: I = 100*1000/(3.3*1000) = 30.31 Amps

## 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] / (V * 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 From Given Line to Line Voltage

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

I = [kVA * 1000] / (V(L-L) * 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

## Three Phase kVA to Amps From Given Line to Neutral Voltage

The three-phase kVA calculation is the ratio of 1000 times kVA to 3 times the line to neutral voltage.

I = [kVA * 1000] / (V(L-N) * 3)

Example: For a given 3 phase AC circuit the kVA is 10, while line to neutral voltage is 520 V. Calculate the amps.

Solution: I = [10 kVA * 1000] / [520 * 3] = 6.41 A

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