1. What is kVA to Amps Three Phase Calculator?

Definition: This calculator converts apparent power in kVA to current in amps for three-phase electrical systems.

Purpose: It helps electricians and engineers determine the current draw of three-phase equipment based on its power rating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current (amps)
• \( kVA \) — Apparent power (kilovolt-amperes)
• \( V \) — Line voltage (volts)
• \( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The formula converts kVA to VA (×1000), then divides by the product of voltage and √3 to get the current per phase.

3. Importance of Three Phase Current Calculation

Details: Accurate current calculation is essential for proper wire sizing, circuit breaker selection, and electrical system design.

4. Using the Calculator

Tips: Enter the apparent power in kVA and line voltage (default 400V). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line and phase voltage?
A: Line voltage is between any two phases, while phase voltage is between a phase and neutral. For star systems, line voltage = √3 × phase voltage.

Q2: Why do we multiply by √3 in three-phase calculations?
A: The √3 accounts for the 120° phase difference between the three phases in a balanced system.

Q3: What's a typical three-phase voltage?
A: Common voltages include 208V, 400V, 480V (industrial) and 230V, 400V (commercial/residential in many countries).

Q4: Does this work for both delta and wye configurations?
A: Yes, as long as you use the correct line voltage for your system.

Q5: How does power factor affect this calculation?
A: This formula gives the apparent current. For real current (including power factor), you'd need the kW value instead of kVA.