1. What is a Three Phase Power Calculator?

Definition: This calculator computes the real power in a three-phase electrical system based on voltage, current, and power factor.

Purpose: It helps electrical engineers, technicians, and electricians determine the actual power consumption in three-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Real power (watts)
• \( V \) — Line-to-line voltage (volts)
• \( I \) — Current (amperes)
• \( PF \) — Power factor (decimal between 0 and 1)

Explanation: The square root of 3 accounts for the phase difference in three-phase systems, while the power factor represents the ratio of real power to apparent power.

3. Importance of Three Phase Power Calculation

Details: Accurate power calculation is essential for proper electrical system design, load balancing, energy efficiency, and equipment sizing.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts, current in amperes, and power factor (default 0.8). All values must be > 0, with power factor between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power (doing work) to apparent power (total power in system), ranging from 0 to 1.

Q2: What's a typical power factor value?
A: Industrial loads typically have 0.8-0.9, while purely resistive loads have 1.0.

Q3: Is this formula for line-to-line or line-to-neutral voltage?
A: This formula uses line-to-line voltage (common in three-phase systems).

Q4: How does this differ from single-phase power calculation?
A: Single-phase uses P = V × I × PF, without the √3 factor needed for three-phase systems.

Q5: What if I only know line-to-neutral voltage?
A: Multiply line-to-neutral voltage by √3 to get line-to-line voltage first.