1. What is HP to kVA 3-Phase Conversion?

Definition: This calculator converts mechanical horsepower (HP) to electrical kilovolt-amps (kVA) for three-phase power systems.

Purpose: It helps electrical engineers and technicians properly size generators, transformers, and other equipment for motor loads.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kVA \) — Kilovolt-amps (electrical apparent power)
• \( HP \) — Horsepower (mechanical power)
• \( PF \) — Power factor (efficiency ratio, 0-1)
• \( 746 \) — Conversion factor (watts per HP)

Explanation: The formula converts mechanical power to electrical power while accounting for system efficiency (power factor).

3. Importance of HP to kVA Conversion

Details: Proper conversion ensures electrical systems can handle motor starting currents and running loads without overload.

4. Using the Calculator

Tips: Enter the motor horsepower and power factor (default 0.8). Power factor must be between 0.01 and 1.0.

5. Frequently Asked Questions (FAQ)

Q1: Why is power factor important?
A: Power factor represents system efficiency - lower PF means more kVA is needed for the same HP load.

Q2: What's a typical power factor for motors?
A: Most 3-phase motors have PF between 0.8-0.9 when fully loaded, but drops at partial loads.

Q3: Does this work for single-phase systems?
A: No, this formula is specifically for balanced three-phase systems.

Q4: Why multiply by 746?
A: 746 watts = 1 horsepower, converting mechanical to electrical units.

Q5: Should I add a safety margin?
A: Yes, consider adding 10-20% to the calculated kVA for starting currents and future expansion.