Three Phase Power Formula:
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The three phase power formula calculates electrical current (amps) from power (kilowatts), voltage, and power factor in three-phase AC systems. It provides an accurate assessment of current requirements for electrical systems.
The calculator uses the three phase power formula:
Where:
Explanation: The formula converts kilowatts to watts (×1000), accounts for three-phase system characteristics (×√3), and adjusts for power factor efficiency.
Details: Accurate current calculation is crucial for proper electrical system design, circuit breaker sizing, wire gauge selection, and ensuring equipment operates within safe current limits.
Tips: Enter power in kilowatts, voltage in volts, and power factor (0 to 1). All values must be valid (positive numbers, power factor between 0-1).
Q1: Why use this formula instead of single-phase calculation?
A: Three-phase systems require the √3 factor to account for the phase relationship between the three conductors, providing more accurate results for three-phase equipment.
Q2: What is power factor and why is it important?
A: Power factor represents the efficiency of power usage. Lower power factors indicate more reactive power and require higher current for the same real power.
Q3: When should this calculation be used?
A: For three-phase motors, industrial equipment, commercial electrical systems, and any application involving three-phase AC power distribution.
Q4: Are there limitations to this formula?
A: Assumes balanced three-phase system and sinusoidal waveforms. May need adjustment for highly unbalanced loads or non-linear loads.
Q5: How does voltage affect the current calculation?
A: Higher voltage results in lower current for the same power, which is why high-voltage transmission is used to reduce current and line losses.