1. What is 3 Phase kVA Calculation?

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

Purpose: Helps electrical engineers and technicians determine the apparent power in three-phase circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula accounts for the phase difference in three-phase systems by multiplying by √3.

3. Importance of kVA Calculation

Details: kVA represents the total power in an AC circuit, including both real and reactive power. It's crucial for sizing transformers, generators, and circuit protection.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kVA?
A: kW is real power (actual work done), while kVA is apparent power (total power in the circuit including reactive power).

Q2: Is this formula for line-to-line or line-to-neutral voltage?
A: This uses line-to-line voltage. For line-to-neutral, remove the √3 factor.

Q3: Why do we divide by 1000?
A: To convert from volt-amperes (VA) to kilovolt-amperes (kVA).

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

Q5: What's a typical power factor for calculations?
A: This calculator doesn't use power factor. For real power (kW), you'd multiply kVA by power factor (typically 0.8-0.95).