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Three Phase Amp Formula:
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The three phase amp formula calculates electrical current in a three-phase system from power, voltage, and power factor. It's essential for electrical engineering applications involving three-phase power systems.
The calculator uses the three phase formula:
Where:
Explanation: The formula accounts for the three-phase power system configuration and the power factor, which represents the phase difference between voltage and current.
Details: Accurate current calculation is crucial for proper electrical system design, circuit breaker sizing, wire gauge selection, and ensuring electrical safety in three-phase systems.
Tips: Enter power in watts, voltage in volts, and power factor as a decimal between 0 and 1. All values must be valid (positive numbers, power factor between 0-1).
Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. It's important because it affects the efficiency of power transmission and 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 to calculate line current from known power, voltage, and power factor values.
Q3: What are typical power factor values?
A: Power factor typically ranges from 0.7 to 1.0. Resistive loads have PF near 1.0, while inductive loads (motors, transformers) have lower power factors.
Q4: Can this calculator be used for single-phase systems?
A: No, this calculator is specifically for three-phase systems. Single-phase systems use a different formula: I = P / (V × PF).
Q5: Why is √3 used in the formula?
A: The √3 factor accounts for the phase relationship in three-phase systems. It comes from the mathematical relationship between line and phase quantities in balanced three-phase circuits.