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Conversion Formula:
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The horsepower to kilowatts conversion is used to translate mechanical power (horsepower) to electrical power (kilowatts) for three-phase motors. This conversion is essential for electrical system design and energy efficiency calculations.
The calculator uses the conversion formula:
Where:
Explanation: The conversion factor 0.7457 represents the relationship between mechanical horsepower and electrical kilowatts for three-phase motor systems.
Details: Accurate power unit conversion is crucial for electrical system design, motor selection, energy consumption calculations, and compliance with international standards that often use different measurement systems.
Tips: Enter the horsepower value in the input field. The value must be a positive number. The calculator will automatically compute the equivalent power in kilowatts.
Q1: Why is the conversion factor 0.7457?
A: This factor represents the exact conversion between mechanical horsepower (550 foot-pounds per second) and electrical kilowatts (1000 watts), specifically calibrated for three-phase motor efficiency.
Q2: Does this conversion work for all motor types?
A: This conversion is specifically designed for three-phase AC motors. Single-phase motors or DC motors may have slightly different conversion factors.
Q3: How accurate is this conversion?
A: The mathematical conversion is exact, but actual motor efficiency may vary based on motor design, load conditions, and operating temperature.
Q4: When would I need to convert HP to kW?
A: This conversion is commonly needed for electrical system design, energy audits, comparing motor specifications, and complying with international standards that use metric units.
Q5: Are there different types of horsepower?
A: Yes, there are several definitions of horsepower (mechanical, metric, electrical). This calculator uses the standard mechanical horsepower (1 HP = 745.7 watts) conversion for three-phase motors.