1. What is 3-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 industrial motors and other heavy loads.

2. How Does the Calculator Work?

The calculator uses the 3-phase power formula:

Where:

• \( P \) — Power in watts (W)
• \( V \) — Line-to-line voltage (V)
• \( I \) — Current in amperes (A)
• \( PF \) — Power factor (unitless, 0 to 1)

Explanation: The √3 factor accounts for the phase difference between the three phases in a balanced system.

3. Importance of Power Factor

Details: Power factor represents the ratio of real power to apparent power. A low power factor (below 0.8) indicates poor electrical efficiency and may result in additional charges from utility companies.

4. Using the Calculator

Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (between 0 and 1). Typical power factor for industrial loads is 0.8-0.95.

5. Frequently Asked Questions (FAQ)

Q1: What is line-to-line voltage?
A: It's the voltage measured between any two phase conductors in a three-phase system. For example, 208V or 480V in North American systems.

Q2: How does this differ from single-phase power calculation?
A: Single-phase power is simply P = V × I × PF, without the √3 factor.

Q3: What's a typical power factor value?
A: Resistive loads have PF=1, motors typically 0.8-0.9, and heavily inductive loads can be 0.5 or lower.

Q4: Can I use this for unbalanced loads?
A: This formula works for balanced loads. For unbalanced loads, calculate each phase separately and sum the results.

Q5: How can I improve power factor?
A: Power factor correction capacitors can be added to counteract inductive loads and improve power factor.