1. What is 3 Phase Motor Power?

Three phase motor power refers to the electrical power consumed or produced by a three-phase AC motor. It is calculated using voltage, current, and power factor to determine the actual power being used by the motor.

2. How Does the Calculator Work?

The calculator uses the 3 phase power formula:

Where:

• \( P \) — Power in watts
• \( V \) — Voltage in volts
• \( I \) — Current in amps
• \( \sqrt{3} \) — Constant for 3-phase systems (approximately 1.732)
• \( PF \) — Power factor (decimal between 0 and 1)

Explanation: The formula calculates the real power in a balanced three-phase AC circuit, accounting for the phase relationship between voltage and current.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for proper motor sizing, energy efficiency analysis, electrical system design, and determining operational costs of three-phase motors.

4. Using the Calculator

Tips: Enter voltage in volts, current in amps, and power factor as a decimal between 0 and 1. All values must be valid positive numbers with power factor between 0-1.

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. It indicates how effectively electrical power is being used, with values closer to 1 being more efficient.

Q2: What is the difference between single-phase and three-phase power?
A: Three-phase power uses three alternating currents that are phase-shifted by 120 degrees, providing more consistent power delivery and higher efficiency for industrial applications.

Q3: What are typical power factor values for motors?
A: Induction motors typically have power factors between 0.8-0.9 when fully loaded, but this can drop significantly under light loads.

Q4: Can this calculator be used for generator power calculation?
A: Yes, the same formula applies for calculating the power output of three-phase generators.

Q5: How does motor efficiency relate to power calculation?
A: The calculated power represents electrical input power. To find mechanical output power, you would need to multiply by the motor's efficiency rating.