1. What is the 3-Phase Amps to kW Calculator?

Definition: This calculator converts electrical current (amps) to power (kilowatts) in three-phase systems.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula accounts for all three phases in the system and converts watts to kilowatts.

3. Importance of 3-Phase Power Calculation

Details: Accurate power calculation is essential for sizing electrical components, energy management, and system efficiency analysis.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line and phase voltage?
A: Line voltage is measured between any two lines, while phase voltage is between a line and neutral (line voltage = √3 × phase voltage).

Q2: What's a typical power factor value?
A: Motors typically have PF of 0.8-0.9, while resistive loads have PF=1. The default 0.8 is common for industrial loads.

Q3: Can I use this for single-phase systems?
A: No, use P(kW) = V × I × PF / 1000 for single-phase (omit the √3 factor).

Q4: Why is the √3 factor needed?
A: It accounts for the phase difference between the three phases in a balanced system.

Q5: How accurate is this calculation?
A: It's theoretically accurate for balanced three-phase systems. Unbalanced systems require more complex calculations.