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

Definition: This calculator converts real power (kW) to apparent power (kVA) for 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:

• kVA — Apparent power (kilovolt-amperes)
• P_kW — Real power (kilowatts)
• PF — Power factor (unitless, between 0 and 1)

Explanation: The real power (kW) is divided by the power factor to calculate the apparent power (kVA) needed for the system.

3. Importance of kVA Calculation

Details: Proper kVA calculation ensures correct sizing of transformers, generators, and other electrical equipment to handle both real and reactive power demands.

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 how effectively power is being used (typically 0.8-0.95 for industrial loads).

Q2: Why is kVA different from kW?
A: kW measures real power being used, while kVA measures the total power (real + reactive) that must be supplied to the system.

Q3: What's a typical power factor value?
A: Motors typically have 0.8-0.9, fluorescent lights 0.5-0.9, and resistive loads (heaters) have 1.0.

Q4: Does this work for single-phase systems?
A: The same formula applies, but three-phase systems require considering line-to-line or line-to-neutral voltages in more detailed calculations.

Q5: How can I improve power factor?
A: Using power factor correction capacitors, synchronous condensers, or selecting more efficient equipment can improve power factor.