1. What is a 3 Phase kVA to Amps Calculator?

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

Purpose: It helps electricians, engineers, and technicians 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-amps)
• \( V \) — 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 line current.

3. Importance of Current Calculation

Details: Proper current calculation ensures correct wire sizing, circuit breaker selection, and prevents equipment overload in three-phase systems.

4. Using the Calculator

Tips: Enter the apparent power in kVA and line voltage (default 480V). 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 delta systems, they're equal; for wye, line voltage is √3 × phase voltage.

Q2: Does this work for both delta and wye systems?
A: Yes, as long as you use the correct line voltage for your system configuration.

Q3: What's a typical three-phase voltage?
A: Common voltages include 208V, 240V, 480V, and 600V in North America; 380V and 400V in Europe.

Q4: How do I calculate single-phase current?
A: For single-phase, use I = (kVA × 1000) / V (without the √3 factor).

Q5: Does this account for power factor?
A: No, this calculates apparent current. For real current (including power factor), use kW instead of kVA.