Three Phase Power Formula:
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The three phase power formula calculates electrical current (amps) from power (kilowatts) in a three-phase AC system. It accounts for voltage, power factor, and the three-phase constant (√3 ≈ 1.732) to provide accurate current measurements.
The calculator uses the three phase power formula:
Where:
Explanation: The formula converts kilowatts to watts (×1000), then divides by the product of voltage, square root of 3 (for three-phase systems), and power factor to obtain the current.
Details: Accurate current calculation is essential 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 positive numbers with power factor between 0 and 1.
Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. It's crucial because it affects the actual current drawn by electrical equipment.
Q2: When should I use this three-phase formula?
A: Use this formula for balanced three-phase AC systems commonly found in industrial and commercial electrical applications.
Q3: What is the typical range for power factor?
A: Power factor typically ranges from 0.7 to 1.0. Values closer to 1 indicate more efficient power usage.
Q4: 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 for long-distance power distribution.
Q5: Can this calculator be used for single-phase systems?
A: No, this calculator is specifically for three-phase systems. Single-phase calculations use a different formula without the √3 factor.