1. What is a HP to Watts 3 Phase Calculator?

Definition: This calculator converts 3-phase motor horsepower (HP) to electrical power in watts (W).

Purpose: It helps electrical engineers, technicians, and maintenance personnel convert between mechanical and electrical power units for 3-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Power in watts (W)
• \( HP \) — Horsepower (mechanical power)

Explanation: The conversion factor 746 comes from the definition of 1 horsepower = 746 watts. This is a direct conversion regardless of phase.

3. Importance of Power Conversion

Details: Accurate power conversion is essential for proper motor sizing, electrical system design, and energy efficiency calculations in industrial applications.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this conversion different for 3-phase vs single-phase?
A: No, the HP to watts conversion is the same (746 W = 1 HP). The phase affects current calculations, not the power conversion itself.

Q2: Does this account for motor efficiency?
A: No, this is the theoretical conversion. Actual electrical input power would be higher to account for motor inefficiencies.

Q3: What's the difference between HP and watts?
A: Horsepower is a unit of mechanical power, while watts measure electrical power. They are different units for the same physical quantity.

Q4: Why is the conversion factor 746?
A: It comes from the original definition of horsepower (550 foot-pounds per second) converted to watts (1 watt = 0.737 foot-pounds per second).

Q5: How would I calculate current from this result?
A: For 3-phase: \( I = \frac{P_w}{\sqrt{3} \times V \times PF \times \eta} \), where V is voltage, PF is power factor, and η is efficiency.