3 Phase Motor Power Consumption Calculator

3-Phase Power Formula:

\[ P = \sqrt{3} \times V \times I \times PF \]

Power Consumption (P):

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1. What is 3-Phase Power Calculation?

The 3-phase power calculation determines the real power consumed by a three-phase electrical system. It accounts for the voltage, current, and power factor in a balanced three-phase circuit.

2. How Does the Calculator Work?

The calculator uses the 3-phase power formula:

\[ P = \sqrt{3} \times V \times I \times PF \]

Where:

\( P \) — Real power in watts
\( V \) — Line-to-line voltage in volts
\( I \) — Current in amps
\( PF \) — Power factor (0 to 1)

Explanation: The √3 factor accounts for the phase difference in three-phase systems. Power factor represents the ratio of real power to apparent power.

3. Importance of Power Factor

Details: Power factor indicates how effectively electrical power is converted into useful work. Low PF means poor utilization and may incur penalties from utilities.

4. Using the Calculator

Tips: Enter line-to-line voltage (V), current (I), and power factor (typically 0.8-0.95 for motors). All values must be positive (PF between 0-1).

5. Frequently Asked Questions (FAQ)

Q1: What's typical power factor for motors?
A: Induction motors typically have PF of 0.85 at full load, dropping to 0.2-0.3 at no load.

Q2: Line-to-line vs line-to-neutral voltage?
A: This formula uses line-to-line voltage (common in industrial settings). For line-to-neutral, remove √3 factor.

Q3: How to improve power factor?
A: Add power factor correction capacitors near inductive loads like motors.

Q4: Does this work for unbalanced loads?
A: No, this assumes balanced 3-phase system. Unbalanced loads require more complex calculations.

Q5: What about motor efficiency?
A: This calculates input power. Output power would multiply by efficiency (typically 80-95% for motors).