Kilowatt to Amps 3 Phase

3-Phase Current Formula:

\[ I = \frac{P_{kW} \times 1000}{V \times PF \times \sqrt{3}} \]

Current (I): amps

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1. What is a Kilowatt to Amps 3 Phase Calculator?

Definition: This calculator converts electrical power in kilowatts to current in amps for three-phase 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:

\[ I = \frac{P_{kW} \times 1000}{V \times PF \times \sqrt{3}} \]

Where:

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

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

3. Importance of 3-Phase Current Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in the formula?
A: √3 (approximately 1.732) accounts for the phase difference in three-phase systems.

Q2: What's a typical power factor value?
A: Motors typically have 0.8-0.9 PF, while resistive loads have 1.0 PF.

Q3: Is this for line-to-line or line-to-neutral voltage?
A: The formula uses line-to-line voltage (common in three-phase systems).

Q4: How does this differ from single-phase calculation?
A: Single-phase omits the √3 factor and uses phase-to-neutral voltage.

Q5: What if I know horsepower instead of kW?
A: First convert HP to kW (1 HP ≈ 0.746 kW) before using this calculator.