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

Definition: This calculator converts horsepower (HP) to kilovolt-amperes (kVA) for 3-phase electrical systems.

Purpose: It helps electrical engineers and technicians properly size electrical equipment for motor-driven systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{kVA} \) — Apparent power in kilovolt-amperes
• \( \text{HP} \) — Horsepower rating of the motor
• \( \text{PF} \) — Power factor (typically 0.8-0.95)
• \( 746 \) — Conversion factor from HP to watts

Explanation: The formula converts mechanical power (HP) to electrical power (kVA) accounting for power factor in AC systems.

3. Importance of HP to kVA Conversion

Details: Proper conversion ensures correct sizing of transformers, generators, and circuit protection for motor loads.

4. Using the Calculator

Tips: Enter the motor horsepower and power factor (default 0.85). Power factor must be between 0.1 and 1.0.

5. Frequently Asked Questions (FAQ)

Q1: Why is power factor important?
A: Power factor represents the ratio of real power to apparent power, affecting system efficiency and equipment sizing.

Q2: What's a typical power factor for motors?
A: Most 3-phase motors have power factors between 0.8 and 0.95 when fully loaded.

Q3: Does this work for single-phase systems?
A: No, this calculator is specifically for 3-phase systems which have different calculations.

Q4: Where does the 746 come from?
A: 1 HP equals 746 watts, the conversion factor between mechanical and electrical power.

Q5: Should I use running or starting HP?
A: Use the motor's rated HP (running HP). Starting current is typically handled separately.