1. What is Electric Motor Running Cost?

The electric motor running cost calculates how much it costs to operate an electric motor based on its power consumption, operating time, and electricity rate. This helps in budgeting and energy efficiency assessments.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( P \) — Motor power in kilowatts (kW)
• \( t \) — Running time in hours
• \( \text{Rate} \) — Electricity cost per kilowatt-hour

Explanation: The formula multiplies the motor's power consumption by the duration of operation and the cost per unit of electricity.

3. Importance of Cost Calculation

Details: Calculating running costs helps in comparing motor efficiency, budgeting for industrial operations, and making informed decisions about equipment upgrades or replacements.

4. Using the Calculator

Tips: Enter motor power in kW (check nameplate or specifications), operating time in hours, and your local electricity rate. For accurate results, use actual measured values when possible.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my motor's power rating?
A: Check the motor nameplate which typically lists power in kW or HP (1 HP ≈ 0.746 kW). For precise calculations, measure actual power consumption.

Q2: Should I use peak or average power?
A: For continuous operation, use rated power. For variable loads, use average power consumption if known.

Q3: What if my motor isn't running at full load?
A: Motors consume less power at partial loads. For accurate results, measure actual power consumption with a wattmeter.

Q4: How do I account for motor efficiency?
A: The calculation already accounts for efficiency since input power (what you pay for) is used. Higher efficiency motors draw less power for the same mechanical output.

Q5: Can this be used for three-phase motors?
A: Yes, as long as you use the motor's input power in kW (not mechanical output power).