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Three Phase Power Formula:
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The three phase power calculation determines the real power (watts) consumed by a three-phase motor or electrical system. It accounts for voltage, current, power factor, and the √3 constant that represents the phase relationship in three-phase systems.
The calculator uses the three phase power formula:
Where:
Explanation: The formula calculates real power by multiplying voltage, current, the √3 constant for three-phase systems, and the power factor which represents the phase difference between voltage and current.
Details: Accurate power calculation is essential for electrical system design, motor sizing, energy consumption analysis, and determining electrical load requirements in industrial and commercial applications.
Tips: Enter voltage in volts, current in amps, and power factor (0 to 1). All values must be positive numbers. The power factor represents the efficiency of power usage in the system.
Q1: What is power factor and why is it important?
A: Power factor measures how effectively electrical power is converted into useful work. A higher power factor (closer to 1) indicates more efficient power usage.
Q2: What is the significance of √3 in three-phase calculations?
A: √3 (approximately 1.732) accounts for the 120-degree phase difference between the three phases in a balanced three-phase system.
Q3: How does this differ from single-phase power calculation?
A: Single-phase power calculation uses W = V × I × PF without the √3 factor. Three-phase systems are more efficient for power transmission.
Q4: 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.
Q5: Can this calculator be used for both delta and wye configurations?
A: Yes, the formula applies to both delta and wye configurations when using line-to-line voltage and line current.