1. What is kWh Calculation for 3 Phase Power?

The kWh (kilowatt-hour) calculation for 3 phase power determines the energy consumption of a three-phase electrical system over time. It's essential for understanding power usage, calculating electricity costs, and designing electrical systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kWh \) — Energy in kilowatt-hours
• \( P \) — Power in watts (W)
• \( h \) — Time in hours

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1000, providing a standard unit for energy measurement.

3. Importance of Energy Calculation

Details: Accurate energy calculation is crucial for electrical system design, energy efficiency analysis, cost estimation, and compliance with electrical codes.

4. Using the Calculator

Tips: Enter power in watts and time in hours. For three-phase systems, use the total power (sum of all phases). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How is this different from single-phase calculation?
A: The basic formula is the same, but three-phase systems typically have higher power values and more complex power factor considerations.

Q2: What's the difference between kW and kWh?
A: kW measures power (instantaneous), while kWh measures energy (power over time).

Q3: Should I use peak or average power?
A: For accurate energy consumption estimates, use average power over the time period.

Q4: How does power factor affect this calculation?
A: For precise calculations, use apparent power (VA) or true power (W) that already accounts for power factor.

Q5: Can I use this for large industrial systems?
A: Yes, but ensure your power measurement accounts for all three phases and any power factor correction.