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3 Phase Power Formula:
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Three-phase power is a common method of alternating current electric power generation, transmission, and distribution. It is more efficient than single-phase power for large industrial applications and motors.
The calculator uses the 3 phase power formula:
Where:
Explanation: The formula calculates the real power in a balanced three-phase system, accounting for the phase relationship between voltage and current.
Details: Power factor represents the ratio of real power flowing to the load to the apparent power in the circuit. A higher power factor indicates more efficient power usage, with 1.0 being ideal.
Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (between 0 and 1). All values must be valid (voltage > 0, current > 0, 0 ≤ PF ≤ 1).
Q1: What is the difference between line-to-line and line-to-neutral voltage?
A: In a three-phase system, line-to-line voltage is the voltage between any two phases, while line-to-neutral is between a phase and the neutral point.
Q2: Why is √3 used in the formula?
A: The √3 factor accounts for the phase difference in three-phase systems and converts between line and phase quantities.
Q3: What affects power factor?
A: Power factor is affected by inductive or capacitive loads. Inductive loads (motors, transformers) cause lagging power factor, while capacitive loads cause leading power factor.
Q4: How can power factor be improved?
A: Power factor can be improved by adding capacitors to offset inductive loads or using power factor correction equipment.
Q5: Is this formula for balanced or unbalanced systems?
A: This formula is for balanced three-phase systems where all three phases carry equal currents with 120° phase separation.