Power Conversion Formula:
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The horsepower to kilowatts conversion is a standard calculation used to convert mechanical power (horsepower) to electrical power (kilowatts), particularly relevant for three-phase motor applications.
The calculator uses the conversion formula:
Where:
Explanation: This conversion factor is derived from the relationship where 1 horsepower equals approximately 0.7457 kilowatts.
Details: Accurate power conversion is essential for electrical system design, motor selection, energy consumption calculations, and compliance with international standards in three-phase power systems.
Tips: Enter the horsepower value (default is 7.5 hp for three-phase applications). The calculator will automatically compute the equivalent power in kilowatts.
Q1: Why is 0.7457 used as the conversion factor?
A: This is the standard conversion factor where 1 mechanical horsepower equals 745.7 watts, or 0.7457 kilowatts.
Q2: Does this conversion apply to both single-phase and three-phase systems?
A: The horsepower to kilowatts conversion is the same regardless of phase. However, three-phase systems have different power factor considerations for complete electrical calculations.
Q3: What is a typical three-phase motor efficiency?
A: Three-phase motors typically have efficiencies ranging from 85% to 95%, depending on size, design, and load conditions.
Q4: How accurate is this conversion for practical applications?
A: The conversion is mathematically precise. For real-world applications, additional factors like motor efficiency and power factor should be considered for complete electrical system design.
Q5: Can I use this calculator for other horsepower values?
A: Yes, simply enter any valid horsepower value to calculate the equivalent kilowatts using the same conversion factor.