1. What is 3 Phase kVA?

kVA (kilovolt-amperes) is a unit of apparent power in an electrical circuit. In three-phase systems, it represents the total power including both real and reactive power components.

2. How Does the Calculator Work?

The calculator uses the 3-phase kVA formula:

Where:

• \( V \) — Line-to-line voltage (volts)
• \( I \) — Current (amperes)
• \( \sqrt{3} \) — Constant for three-phase systems (≈1.732)
• 1000 — Conversion factor from VA to kVA

Explanation: The formula calculates the total apparent power in a balanced three-phase system by accounting for the phase difference between voltage and current.

3. Importance of kVA Calculation

Details: kVA calculation is essential for sizing transformers, circuit breakers, and other electrical equipment. It helps ensure systems are properly designed to handle the electrical load without overheating or failing.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kVA and kW?
A: kVA is apparent power (volts × amperes), while kW is real power (volts × amperes × power factor). kVA accounts for the total power in the system.

Q2: Is this formula for line or phase values?
A: This formula uses line-to-line voltage and line current (not phase values).

Q3: Does this work for unbalanced loads?
A: This formula assumes a balanced three-phase system. For unbalanced loads, calculations become more complex.

Q4: What voltage should I use for the calculation?
A: Use the line-to-line (phase-to-phase) voltage, not the line-to-neutral voltage.

Q5: How does this relate to power factor?
A: kVA represents apparent power. To find real power (kW), multiply kVA by the power factor (kW = kVA × PF).