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Three-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 provides a more consistent power delivery.
The calculator uses the three-phase power formula:
Where:
Explanation: The formula calculates the real power in a three-phase AC electrical system, accounting for the phase relationship between voltage and current.
Details: Power factor represents the ratio of real power to apparent power. A higher power factor (closer to 1) indicates more efficient power usage, while lower power factors result in higher energy losses and utility penalties.
Tips: Enter line-to-line voltage in volts, current in amps, and power factor (between 0 and 1). All values must be positive, with power factor ranging from 0 to 1.
Q1: What is the difference between line and phase voltage?
A: Line voltage is measured between any two phases, while phase voltage is measured between a phase and neutral. In three-phase systems, line voltage is √3 times phase voltage.
Q2: Why is three-phase power more efficient?
A: Three-phase systems provide constant power delivery, require less conductor material for the same power transfer, and are better for running large motors.
Q3: What is a typical power factor value?
A: Industrial facilities typically aim for 0.95 or higher. Values below 0.85 may incur utility penalties. Residential power factors are usually 0.8-0.9.
Q4: How can power factor be improved?
A: Power factor correction capacitors, synchronous condensers, or active power factor correction circuits can be used to improve power factor.
Q5: Is this formula for balanced three-phase systems?
A: Yes, this formula assumes a balanced three-phase system where all three phases carry equal currents with 120-degree phase separation.