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Three Phase Wattage Formula:
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Three phase wattage represents the real power in a three-phase electrical system. It's calculated using voltage, current, and power factor to determine the actual power being consumed or delivered in the system.
The calculator uses the three phase power formula:
Where:
Explanation: The formula calculates real power in a balanced three-phase system by accounting for the phase relationship between voltage and current.
Details: Accurate three phase power calculation is essential for electrical system design, load balancing, energy management, and equipment sizing in industrial and commercial applications.
Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (value between 0 and 1). All values must be valid positive numbers with power factor between 0 and 1.
Q1: 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.
Q2: Why is the square root of 3 used in the formula?
A: The √3 factor accounts for the phase relationship between line-to-line voltage and phase voltage in a balanced three-phase system.
Q3: 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 converted into useful work.
Q4: When should I use line-to-line vs line-to-neutral voltage?
A: This formula uses line-to-line voltage. For line-to-neutral voltage calculations, the formula would be P = 3 × V_phase × I × PF.
Q5: What are typical power factor values?
A: Power factor typically ranges from 0 to 1, with 1 being ideal. Industrial loads often have power factors between 0.7-0.9, while capacitive loads can have leading power factors.