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 motor applications.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The horsepower value is multiplied by the standard conversion factor of 0.746 kW per HP.

3. Importance of HP to kW Conversion

Details: Accurate conversion is essential for proper motor sizing, electrical system design, and energy consumption calculations in 3-phase systems.

4. Using the Calculator

Tips: Simply enter the motor's horsepower rating. The calculator will provide 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 foot-pounds per second = 745.7 watts (rounded to 0.746 kW).

Q2: Does this apply to single-phase motors?
A: Yes, the HP to kW conversion is the same regardless of phase, but 3-phase motors are more common for industrial applications.

Q3: Is this the actual power consumption?
A: This is the theoretical conversion. Actual power consumption depends on motor efficiency and power factor.

Q4: What about motor efficiency?
A: For actual electrical input power, divide the result by the motor's efficiency (typically 0.8-0.95).

Q5: How does this relate to current draw?
A: Current can be calculated from kW using: \( I = \frac{P_{kW} \times 1000}{\sqrt{3} \times V \times PF \times Eff} \), where V is voltage, PF is power factor, and Eff is efficiency.