1. What is a 3 Phase Current to kW Calculator?

Definition: This calculator converts three-phase electrical current to power in kilowatts using voltage, current, and power factor.

Purpose: It helps electrical engineers, technicians, and electricians determine the power consumption of three-phase 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 (0 to 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 equipment, calculating energy costs, and ensuring system efficiency.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts, current in amps, 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, ranging from 0 to 1. Higher values indicate more efficient power usage.

Q2: Why is √3 used in the formula?
A: The √3 accounts for the phase difference in three-phase systems (120° between phases).

Q3: What's a typical power factor value?
A: Industrial motors typically have 0.8-0.9 PF, while resistive loads have 1.0 PF.

Q4: Is this for line-to-line or line-to-neutral voltage?
A: The formula uses line-to-line voltage (also called phase-to-phase voltage).

Q5: How do I convert kW to amps?
A: Rearrange the formula: \( I = \frac{P_{kW} \times 1000}{V \times PF \times \sqrt{3}} \)