Convert 3 Phase HP to kW

Power Conversion Formula:

\[ P_{kW} = HP \times 0.746 \]

Power (kW):

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1. What is 3 Phase HP to kW Conversion?

Definition: This calculator converts 3-phase horsepower (HP) to kilowatts (kW) using a standard conversion factor.

Purpose: It helps electrical engineers, technicians, and maintenance personnel quickly convert between these common power units.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{kW} = HP \times 0.746 \]

Where:

\( P_{kW} \) — Power in kilowatts
\( HP \) — Power in horsepower

Explanation: The conversion factor 0.746 kW/HP comes from the exact conversion between mechanical horsepower and kilowatts.

3. Importance of Power Conversion

Details: Accurate conversion is essential for motor sizing, electrical system design, and energy consumption calculations.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this conversion different for single-phase vs three-phase?
A: No, the conversion factor is the same regardless of phase. However, three-phase power calculations involve additional factors like power factor.

Q2: Why is the conversion factor 0.746?
A: 1 mechanical horsepower is defined as exactly 745.69987158227022 watts, which we round to 0.746 kW for practical calculations.

Q3: Does this account for motor efficiency?
A: No, this is a direct unit conversion. For actual power consumption, you would need to consider motor efficiency and power factor.

Q4: Can I convert kW back to HP with this?
A: Not directly, but the inverse calculation would be HP = kW / 0.746.

Q5: Is this valid for all types of horsepower?
A: This uses mechanical horsepower (550 ft·lbf/s). Metric horsepower uses a slightly different conversion factor (0.7355 kW/HP).