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Three Phase Power Formula:
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Three-phase power calculation is essential in electrical engineering for determining the power in three-phase AC systems. It accounts for both the magnitude and phase relationship between voltage and current to calculate real power consumption.
The calculator uses the three-phase power formula:
Where:
Explanation: The formula calculates the real power in a balanced three-phase system by multiplying the product of phase voltage, phase current, and power factor by 3.
Details: Accurate power calculation is crucial for system design, load balancing, energy efficiency analysis, and proper sizing of electrical components in three-phase systems.
Tips: Enter phase voltage in volts, phase current in amperes, and phase angle in degrees. All values must be positive numbers with voltage and current greater than zero.
Q1: What is the difference between line and phase quantities?
A: In three-phase systems, phase quantities refer to measurements across a single phase, while line quantities refer to measurements between lines. The relationship depends on whether the system is star or delta connected.
Q2: Why is power factor important?
A: Power factor represents the ratio of real power to apparent power. A lower power factor indicates more reactive power and less efficient energy usage.
Q3: When is this formula applicable?
A: This formula is valid for balanced three-phase systems with sinusoidal waveforms. For unbalanced systems, more complex calculations are required.
Q4: How does phase angle affect power calculation?
A: The phase angle determines the power factor. When voltage and current are in phase (θ=0), power factor is 1 and maximum power is delivered. As the phase difference increases, power factor decreases.
Q5: Can this calculator be used for single-phase systems?
A: For single-phase systems, use the formula P = V × I × cos(θ) without the factor of 3.