Conversion kW to Amps Calculator

Electrical Power Formula:

\[ I = \frac{kW \times 1000}{V} \]

For 3-phase systems: \[ I = \frac{kW \times 1000}{V \times \sqrt{3}} \]

Current (I):

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1. What is kW to Amps Conversion?

The kW to Amps conversion calculates the electric current (in amperes) from power (in kilowatts) and voltage. This is essential for electrical system design, circuit protection, and equipment selection.

2. How Does the Calculator Work?

The calculator uses the electrical power formula:

\[ I = \frac{kW \times 1000}{V} \text{ (Single Phase)} \] \[ I = \frac{kW \times 1000}{V \times \sqrt{3}} \text{ (Three Phase)} \]

Where:

\( I \) — Current in amperes (A)
\( kW \) — Power in kilowatts
\( V \) — Voltage in volts
\( \sqrt{3} \) — Approximately 1.732 (for three-phase systems)

Explanation: The formula converts kW to watts (×1000), then divides by voltage. For three-phase systems, accounts for phase difference with √3 factor.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for proper wire sizing, circuit breaker selection, and preventing electrical overloads that could cause fires or equipment damage.

4. Using the Calculator

Tips: Enter power in kW, voltage in volts, and select single or three-phase system. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between single and three-phase?
A: Single-phase has one alternating voltage (typical for homes). Three-phase has three voltages offset by 120° (used in industrial/commercial settings).

Q2: Why multiply by 1000 in the formula?
A: This converts kilowatts (kW) to watts (W) since 1 kW = 1000 W.

Q3: What's the power factor in this calculation?
A: This simple calculation assumes unity power factor (1.0). For non-resistive loads, actual current may be higher.

Q4: How accurate is this calculation?
A: It provides theoretical current. Real-world values may vary due to power factor, efficiency, and voltage fluctuations.

Q5: When should I use three-phase calculation?
A: For any three-phase equipment like industrial motors, large HVAC systems, or commercial electrical distribution.