1. What is 3 Phase Power Calculation?

Definition: This calculator computes the real power in kilowatts (kW) for a three-phase electrical system.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Real power (kilowatts)
• \( V \) — Line-to-line voltage (volts)
• \( I \) — Current (amps)
• \( PF \) — Power factor (0 to 1)
• \( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The formula accounts for all three phases and the phase difference between voltage and current.

3. Importance of 3 Phase Power Calculation

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

4. Using the Calculator

Tips: Enter the line-to-line voltage, current, and power factor (default 0.8). Power factor must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power, representing how effectively current is being converted into useful work.

Q2: What's a typical power factor value?
A: Industrial loads typically range from 0.8 to 0.95. Motors often have 0.85 PF at full load.

Q3: Is this formula for line or phase values?
A: The formula uses line-to-line voltage and line current (standard three-phase measurements).

Q4: How does this differ from single-phase calculation?
A: Single-phase uses P=VI×PF, while three-phase includes the √3 factor to account for all three phases.

Q5: Why divide by 1000?
A: This converts the result from watts to kilowatts (1 kW = 1000 W).