1. What is the 3-Phase Motor kWh Calculation?

The 3-phase motor kWh calculation determines the energy consumption of a three-phase electric motor based on its power rating and operating time. This helps in estimating electricity costs and energy efficiency.

2. How Does the Calculator Work?

The calculator uses the basic energy formula:

Where:

• \( P \) — Power in watts (W)
• \( t \) — Time in hours (h)
• 1000 — Conversion factor from watts to kilowatts

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1000, which is the standard unit for electricity billing.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in:

• Estimating operational costs
• Comparing motor efficiency
• Planning energy usage
• Assessing environmental impact

4. Using the Calculator

Tips:

• Enter power in watts (check motor nameplate)
• Enter operating time in hours
• For partial hours, use decimals (e.g., 1.5 for 1 hour 30 minutes)
• All values must be positive numbers

5. Frequently Asked Questions (FAQ)

Q1: How do I find my motor's power rating?
A: Check the motor nameplate for wattage (W) or kilowatt (kW) rating. If in kW, multiply by 1000 to get watts.

Q2: Can I use this for single-phase motors?
A: Yes, the same formula applies to single-phase motors, but ensure you're using the correct power rating.

Q3: How accurate is this calculation?
A: It provides theoretical consumption. Actual usage may vary based on load, efficiency, and power factor.

Q4: Should I use running current instead of power?
A: For more accuracy with 3-phase motors: kWh = √3 × V × I × PF × t / 1000, where V=voltage, I=current, PF=power factor.

Q5: How do I convert kWh to cost?
A: Multiply kWh by your electricity rate (per kWh). Rates vary by location and provider.