3 Phase Power Formula:
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The 3 phase power formula calculates electrical current (amps) from power (kilowatts), voltage, and power factor in a three-phase electrical system. It's essential for electrical engineering and power system design.
The calculator uses the 3 phase power formula:
Where:
Explanation: The formula converts 4 kilowatts to watts (×1000), then divides by the product of voltage, square root of 3, and power factor to calculate current.
Details: Accurate current calculation is crucial for proper electrical system design, circuit breaker sizing, wire selection, and ensuring electrical safety in three-phase systems.
Tips: Enter voltage in volts and power factor (between 0 and 1). Both values must be valid (voltage > 0, 0 < PF ≤ 1).
Q1: Why is the power factor important in this calculation?
A: Power factor accounts for the phase difference between voltage and current in AC circuits. A lower power factor requires higher current to deliver the same amount of real power.
Q2: What is a typical power factor value?
A: Power factor typically ranges from 0.7 to 1.0. Industrial motors often have power factors around 0.8-0.9, while resistive loads have power factors close to 1.0.
Q3: Why use √3 in three-phase calculations?
A: √3 (approximately 1.732) is used because in balanced three-phase systems, the line-to-line voltage is √3 times the phase voltage.
Q4: Can this calculator be used for different power values?
A: This calculator is specifically designed for 4 kilowatts. For other power values, the formula would need to be adjusted accordingly.
Q5: What are typical voltage values for three-phase systems?
A: Common three-phase voltages include 208V, 240V, 380V, 400V, 415V, 480V, and 600V, depending on the country and application.