1. What is 3 Phase kVA to Amps Calculation?

Definition: This calculator converts three-phase apparent power (kVA) to current (amps) using the line voltage.

Purpose: Essential for electrical engineers and technicians to determine current flow in three-phase power systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula converts kVA to VA (×1000), then divides by the three-phase voltage (line voltage × √3).

3. Importance of Current Calculation

Details: Accurate current calculation ensures proper sizing of conductors, circuit breakers, and other electrical components.

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: Why multiply by 1000 in the formula?
A: To convert kVA (kilovolt-amperes) to VA (volt-amperes) since 1 kVA = 1000 VA.

Q2: What's the significance of √3 in three-phase calculations?
A: √3 (≈1.732) accounts for the phase difference between the three voltage waveforms in a balanced system.

Q3: Is this for line-to-line or line-to-neutral voltage?
A: This formula uses line-to-line voltage (V_LL), the standard measurement for three-phase systems.

Q4: Can I use this for single-phase systems?
A: No, for single-phase use I = kVA × 1000 / V (without the √3 factor).

Q5: What's a typical three-phase voltage?
A: Common voltages include 208V, 240V, 480V (North America) or 400V, 415V (Europe).