1. What is HP to kW 3 Phase Conversion?

Definition: This calculator converts horsepower (HP) to kilowatts (kW) for 3-phase motors.

Purpose: It helps electrical engineers and technicians convert between mechanical power (HP) and electrical power (kW) units.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts (kW)
• \( HP \) — Power in horsepower
• \( 0.746 \) — Conversion factor (1 HP = 0.746 kW)

Explanation: The horsepower value is multiplied by the standard conversion factor of 0.746 to get the equivalent power in kilowatts.

3. Importance of Power Conversion

Details: Accurate conversion between HP and kW is essential for motor sizing, electrical system design, and energy efficiency calculations.

4. Using the Calculator

Tips: Simply enter the horsepower value (must be > 0) and the calculator will display the equivalent power in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the definition of 1 horsepower = 550 ft-lb/s = 745.7 watts (rounded to 0.746 kW).

Q2: Does this work for single-phase motors too?
A: Yes, the conversion factor is the same regardless of phase, but the calculator is labeled for 3-phase as that's the most common industrial application.

Q3: How accurate is this conversion?
A: The conversion is mathematically exact, but real-world motor efficiencies may affect actual power requirements.

Q4: What about metric horsepower?
A: Metric HP (PS) uses a different factor (1 HP = 0.7355 kW). This calculator uses mechanical (imperial) horsepower.

Q5: Can I convert kW back to HP?
A: Yes, divide kW by 0.746 to get HP (or multiply by 1.341 for the inverse conversion).