1. What is a kW to Amps Three Phase Calculator?

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

Purpose: It helps electricians, engineers, and technicians determine the current draw of three-phase equipment based on its power rating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in amps (A)
• \( P_{kW} \) — Power in kilowatts (kW)
• \( V \) — Line-to-line voltage (volts)
• \( PF \) — Power factor (0-1)

Explanation: The kW value is converted to watts (×1000), then divided by the product of voltage, power factor, and √3 (1.732) for three-phase systems.

3. Importance of Current Calculation

Details: Accurate current calculation ensures proper sizing of wires, circuit breakers, and other electrical components to prevent overheating and ensure safety.

4. Using the Calculator

Tips: Enter the power in kW, line voltage (default 480V), and power factor (default 0.8). All values must be > 0 (PF between 0.01 and 1).

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in the formula?
A: The √3 factor accounts for the phase difference in three-phase systems when converting between line and phase values.

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 equipment.

Q3: What voltage should I use?
A: Common three-phase voltages are 208V, 240V, 480V (North America) or 380V, 400V, 415V (Europe). Use your system's line-to-line voltage.

Q4: Is this for AC or DC systems?
A: This calculator is specifically for three-phase AC systems. DC systems use a simpler formula (I = P/V).

Q5: How do I find the power factor?
A: Check equipment specifications, use a power meter, or consult standard values (0.8 for motors, 0.9-1 for lighting/heating).