1. What is HP to kW Conversion for 3-Phase Motors?

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

Purpose: It helps electrical engineers and technicians determine the equivalent electrical power of motor mechanical ratings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts
• \( HP \) — Mechanical horsepower
• 0.746 — Conversion factor (1 HP = 746 watts)

Explanation: The horsepower value is multiplied by 0.746 to convert to kilowatts (1 kW = 1000 watts).

3. Importance of HP to kW Conversion

Details: Proper conversion ensures correct motor sizing, electrical system design, and energy efficiency calculations.

4. Using the Calculator

Tips: Simply enter the motor's horsepower rating. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the exact conversion where 1 horsepower equals 745.7 watts (rounded to 746 watts or 0.746 kW).

Q2: Does this account for motor efficiency?
A: No, this is a direct power unit conversion. Actual electrical input power would be higher due to efficiency losses.

Q3: Is this different for single-phase motors?
A: The conversion factor is the same, but 3-phase motors typically have better power characteristics.

Q4: How accurate is this conversion?
A: It's mathematically precise for unit conversion, but actual motor performance depends on many factors.

Q5: When would I need this conversion?
A: When sizing electrical components, calculating energy consumption, or comparing motor specifications.