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

Definition: This calculator converts real power (kW) to apparent power (kVA) in a 3-phase electrical system using the power factor.

Purpose: It helps electrical engineers and technicians properly size electrical equipment by accounting for both real and reactive power.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The real power is divided by the power factor to determine the total apparent power in the system.

3. Importance of kVA Calculation

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

4. Using the Calculator

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

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 electrical power is being used.

Q2: What's a typical power factor value?
A: Industrial plants typically have power factors between 0.8 and 0.95. Motors often operate around 0.85 PF.

Q3: Why is kVA important in 3-phase systems?
A: Electrical equipment is rated in kVA because it must handle the total apparent power, not just the real power component.

Q4: How does this differ from single-phase calculation?
A: The basic formula is the same, but 3-phase systems have additional considerations like line-to-line vs line-to-neutral voltages.

Q5: What if my power factor is unknown?
A: Use 0.8 as a conservative estimate, or measure it with a power factor meter for accurate results.