1. What is 1 kW to Ampere 3-Phase Calculator?

Definition: This calculator determines the current (in amps) required for a 1 kW load in a 3-phase electrical system.

Purpose: Helps electricians and engineers quickly calculate current draw for balanced 3-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in amperes (A)
• \( V \) — Line-to-line voltage (V)
• \( PF \) — Power factor (unitless, 0-1)
• \( \sqrt{3} \) — Constant for 3-phase calculations (≈1.732)

Explanation: Converts 1 kW to watts (1000 W), then divides by the product of voltage, power factor, and √3.

3. Importance of 3-Phase Current Calculation

Details: Accurate current calculation ensures proper wire sizing, circuit protection, and equipment selection in 3-phase systems.

4. Using the Calculator

Tips: Enter line-to-line voltage (typically 400V) and power factor (default 0.9). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in the formula?
A: The √3 accounts for the phase difference in 3-phase systems, converting between line-to-line and phase quantities.

Q2: What's a typical power factor value?
A: Motors typically have PF 0.8-0.9, resistive loads 1.0. The default 0.9 is common for mixed industrial loads.

Q3: How does voltage affect the current?
A: Higher voltage systems require less current for the same power (inverse relationship).

Q4: What if I need to calculate for more than 1 kW?
A: Simply multiply the result by your actual kW value (e.g., for 5 kW, multiply by 5).

Q5: Does this work for both star and delta connections?
A: Yes, as long as you use the correct line-to-line voltage for your system.