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 AC system. It provides accurate current estimation for balanced three-phase loads.
The calculator uses the 3 phase power formula:
Where:
Explanation: The formula converts 15 kW to watts, then divides by the product of voltage, square root of 3, and power factor to calculate the current.
Details: Accurate current calculation is crucial for proper electrical system design, circuit breaker sizing, wire selection, and ensuring equipment operates within safe current limits.
Tips: Enter line-to-line voltage in volts and power factor (typically between 0.8-1.0). All values must be valid (voltage > 0, power factor between 0.01-1.0).
Q1: Why is the power factor important in this calculation?
A: Power factor represents the ratio of real power to apparent power. Lower power factors result in higher current for the same real power, affecting conductor sizing and system efficiency.
Q2: What is typical voltage range for 3 phase systems?
A: Common voltages include 208V, 240V, 380V, 400V, 415V, 480V, and 600V, depending on the country and application.
Q3: How does this differ from single phase calculation?
A: Single phase uses I = P/(V×PF) while three phase uses I = P/(V×√3×PF). Three phase systems are more efficient for power distribution.
Q4: What if I have a different power value than 15 kW?
A: This calculator is specifically designed for 15 kW. For other power values, the formula would need to be adjusted accordingly.
Q5: When should this calculation be used?
A: This calculation is essential for electrical engineers, technicians, and anyone designing or maintaining three-phase electrical systems with 15 kW loads.