1. What is 3 Phase Watts to Amps Conversion?

Definition: This calculator converts electrical power in watts to current in amps for three-phase AC systems.

Purpose: It helps electricians and engineers determine the current draw of three-phase electrical equipment.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula accounts for the three-phase power relationship where power is distributed across three conductors.

3. Importance of 3 Phase 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 watts, line-to-line voltage (default 480V), and power factor (default 0.8). All values must be > 0, with PF between 0.01 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. It represents how effectively power is being used.

Q2: Why is √3 used in the formula?
A: The √3 accounts for the phase difference in three-phase systems, converting between line-to-line and phase quantities.

Q3: 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.

Q4: Can I use this for single-phase systems?
A: No, use our single-phase calculator as the formula differs (I = P/(V×PF)).

Q5: How do I find the power if I know current?
A: Rearrange the formula: P_w = I × V × PF × √3.