3 Phase Motor Power Consumption Calculator kWh

3 Phase Power Consumption Formula:

\[ kWh = \frac{\sqrt{3} \times V \times I \times PF \times Hours}{1000} \]

Voltage (V):

volts

Current (I):

amps

Power Factor (PF):

(0-1)

Operating Hours:

hours

Energy Consumption:

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1. What is 3 Phase Power Consumption?

Three-phase power consumption calculation determines the electrical energy used by three-phase motors and equipment over time. It accounts for voltage, current, power factor, and operating hours to provide accurate energy usage in kilowatt-hours.

2. How Does the Calculator Work?

The calculator uses the three-phase power formula:

\[ kWh = \frac{\sqrt{3} \times V \times I \times PF \times Hours}{1000} \]

Where:

\( V \) — Voltage between phases (volts)
\( I \) — Current per phase (amps)
\( PF \) — Power factor (0 to 1)
\( Hours \) — Operating time (hours)
\( \sqrt{3} \) — Constant for three-phase systems (approximately 1.732)

Explanation: The formula calculates apparent power (√3 × V × I), multiplies by power factor to get real power, then multiplies by hours to get energy consumption, divided by 1000 to convert to kilowatt-hours.

3. Importance of Power Consumption Calculation

Details: Accurate power consumption calculation is essential for energy management, cost estimation, equipment sizing, and efficiency analysis in industrial and commercial applications.

4. Using the Calculator

Tips: Enter line-to-line voltage in volts, current per phase in amps, power factor (typically 0.8-0.95 for motors), and operating hours. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. Low power factor indicates inefficient power usage and may result in utility penalties.

Q2: How do I measure three-phase voltage and current?
A: Use a multimeter for voltage measurement and clamp meter for current measurement. Measure between phases for voltage and around one conductor for current.

Q3: What is typical power factor for three-phase motors?
A: Typically 0.8-0.95 under full load, but can drop to 0.2-0.3 at no load. Always check motor specifications for exact values.

Q4: Can this calculator be used for single-phase systems?
A: No, this is specifically for three-phase systems. Single-phase calculations use different formulas without the √3 factor.

Q5: How accurate is this calculation for energy billing?
A: This provides a good estimate, but actual billing may include demand charges, power factor penalties, and time-of-use rates that affect final costs.