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3 Phase Motor Power Formula:
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The 3-phase motor power calculation determines the electrical power consumed by a three-phase motor using voltage, current, and power factor measurements. This calculation is essential for electrical system design, energy efficiency analysis, and motor sizing.
The calculator uses the 3-phase power formula:
Where:
Explanation: The formula calculates the real power consumed by a balanced three-phase system, accounting for the phase relationship between voltage and current.
Details: Accurate power calculation is crucial for proper motor selection, electrical system design, energy consumption monitoring, and determining operational costs of industrial equipment.
Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (between 0 and 1). All values must be positive numbers with voltage and current greater than zero.
Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. It indicates how effectively electrical power is being used, with higher values (closer to 1) indicating better efficiency.
Q2: What are typical power factor values for motors?
A: Induction motors typically have power factors between 0.7-0.9 at full load, which decreases with reduced load. Synchronous motors can maintain power factors close to 1.0.
Q3: How does this differ from single-phase power calculation?
A: Single-phase power is calculated as P = V × I × PF, while three-phase power includes the √3 multiplier to account for the phase relationships in three-phase systems.
Q4: When should this calculation be used?
A: This calculation is used for balanced three-phase systems to determine the actual power consumption of motors, heaters, and other three-phase electrical equipment.
Q5: What are common applications of this calculation?
A: Motor sizing, electrical system design, energy audits, cost analysis, and determining electrical load requirements for industrial facilities.