1. What is a kW to kVA Calculator for 3-Phase Systems?

Definition: This calculator converts real power (kW) to apparent power (kVA) in three-phase electrical systems using the power factor.

Purpose: It helps electrical engineers, technicians, and electricians properly size equipment and understand power requirements in AC circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{kVA} \) — Apparent power (kilovolt-amperes)
• \( P_{\text{kW}} \) — Real power (kilowatts)
• \( PF \) — Power factor (unitless, between 0 and 1)

Explanation: The real power is divided by the power factor to account for the phase difference between voltage and current in AC systems.

3. Importance of kW to kVA Conversion

Details: Proper conversion ensures correct sizing of transformers, generators, and other electrical equipment which are typically rated in kVA rather than kW.

4. Using the Calculator

Tips: Enter the real power in kW and power factor (default 0.8). Power factor must be between 0.01 and 1. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power (kW) to apparent power (kVA), representing the efficiency of power usage in an AC circuit.

Q2: What's a typical power factor value?
A: Industrial facilities typically aim for 0.8-0.95. Motors might have 0.85, while purely resistive loads have 1.0.

Q3: Why is this important for 3-phase systems?
A: Three-phase power calculations require accounting for both real and apparent power to properly size equipment and avoid overloading.

Q4: How does this differ from single-phase calculation?
A: The basic formula is the same, but three-phase systems handle higher power levels where proper kVA calculation is more critical.

Q5: What if I know kVA and need kW?
A: Use the inverse formula: kW = kVA × PF. We may add this calculation in a future version.