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 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 (V)
• \( I \) — Current in amperes (A)
• \( PF \) — Power factor (dimensionless, 0-1)

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

3. Importance of Power Calculation

Details: Accurate power calculation is essential for sizing electrical equipment, determining energy consumption, and ensuring system efficiency.

4. Using the Calculator

Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (0-1). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between line and phase voltage?
A: In a three-phase system, line voltage is between any two lines, while phase voltage is between any line and neutral.

Q2: What is a typical power factor value?
A: Power factor typically ranges from 0.8 to 1.0 for most industrial loads. 1.0 indicates purely resistive load.

Q3: Can this formula be used for single-phase systems?
A: No, for single-phase systems use \( P = V \times I \times PF \) (without the √3 factor).

Q4: What is the significance of √3 in the formula?
A: The √3 factor accounts for the phase difference (120°) between the three phases in a balanced system.

Q5: How does unbalanced load affect the calculation?
A: For unbalanced loads, you would need to calculate power for each phase separately and sum them.