1. What is Three-phase kVA to Amps Conversion?

The three-phase kVA to amps conversion calculates the current flow in a three-phase electrical system based on the apparent power (kVA) and voltage. This is essential for proper sizing of electrical components and circuit protection.

2. How Does the Calculator Work?

The calculator uses the three-phase formula:

Where:

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

Explanation: The formula converts kVA to VA (by multiplying by 1000), then divides by the voltage adjusted for three-phase systems.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for selecting proper wire sizes, circuit breakers, and other electrical components to ensure safety and prevent overheating.

4. Using the Calculator

Tips: Enter kVA value (apparent power) and line-to-line voltage. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kVA and kW?
A: kVA is apparent power (volts × amps), while kW is real power. They differ by the power factor (kW = kVA × PF).

Q2: Can I use this for single-phase systems?
A: No, for single-phase use \( I = \frac{kVA \times 1000}{V} \) (without the √3 factor).

Q3: What voltage should I use - line-to-line or line-to-neutral?
A: Always use line-to-line voltage for three-phase calculations.

Q4: How does power factor affect this calculation?
A: This calculation gives you the current based on apparent power (kVA). For real power (kW), you need to consider power factor.

Q5: What are typical voltage values for three-phase systems?
A: Common voltages include 208V, 240V, 380V, 400V, 415V, 480V, 600V, and 690V, depending on region and application.