1. What is Three Phase Power?

Three-phase power is a common method of alternating-current electric power generation, transmission, and distribution. It is more efficient than single-phase power for large loads and industrial applications.

2. How Does the Calculator Work?

The calculator uses the three-phase power formula:

Where:

• \( P \) — Power in watts (W)
• \( V \) — Line-to-line voltage in volts (V)
• \( I \) — Current in amperes (A)
• \( PF \) — Power factor (unitless, 0 to 1)
• \( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The formula calculates real power in a balanced three-phase system, accounting for voltage, current, and power factor.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for designing electrical systems, sizing equipment, determining energy consumption, and ensuring safety and efficiency in electrical installations.

4. Using the Calculator

Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (between 0 and 1). All values must be valid (voltage > 0, current > 0, 0 ≤ PF ≤ 1).

5. Frequently Asked Questions (FAQ)

Q1: What is line-to-line voltage?
A: It's the voltage measured between any two line conductors in a three-phase system, also known as phase-to-phase voltage.

Q2: What if my system is single-phase?
A: For single-phase systems, use P = V × I × PF (without the √3 factor).

Q3: What is power factor?
A: Power factor is the ratio of real power to apparent power, representing the efficiency of power usage (1 is ideal, 0 is purely reactive).

Q4: Does this work for unbalanced loads?
A: This formula is for balanced three-phase systems. Unbalanced systems require more complex calculations.

Q5: What are typical power factor values?
A: Motors: 0.8-0.9, Incandescent lights: 1.0, Fluorescent lights: 0.7-0.9, Induction furnaces: 0.1-0.3.