1. What is a kWh to Amps Calculator (3 Phase)?

Definition: This calculator converts energy consumption (kWh) to current (Amps) in a 3-phase electrical system.

Purpose: It helps electrical engineers, technicians, and facility managers determine the current draw from known energy usage in 3-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in Amperes (A)
• \( E \) — Energy consumption in kilowatt-hours (kWh)
• \( V \) — Line-to-line voltage in Volts (V)
• \( PF \) — Power Factor (dimensionless, 0-1)
• \( H \) — Time duration in hours (h)
• \( \sqrt{3} \) — Constant for 3-phase systems (≈1.732)

Explanation: The formula converts energy to power (kW), then to current while accounting for 3-phase power characteristics.

3. Importance of 3-Phase Current Calculation

Details: Accurate current calculation is essential for proper circuit breaker sizing, conductor selection, and electrical system design in industrial and commercial applications.

4. Using the Calculator

Tips: Enter energy consumption in kWh, system voltage (default 480V), power factor (default 0.85), and time duration (default 1 hour). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in the formula?
A: The square root of 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: Industrial loads typically range from 0.8-0.95. Motors might be 0.85, while purely resistive loads would be 1.0.

Q3: Can I use this for single-phase systems?
A: No, for single-phase use the formula: I = (kWh × 1000) / (V × PF × H)

Q4: Why is time duration important?
A: kWh represents energy over time. The same kWh over different durations results in different current values.

Q5: How accurate is this calculation?
A: It provides theoretical values. Actual current may vary due to voltage fluctuations, harmonics, and other system factors.