1. What is kVA?

kVA (kilovolt-ampere) is a unit of apparent power in an electrical circuit. It represents the total power in an AC circuit, combining both real power (kW) and reactive power (kVAR).

2. How Does the Calculator Work?

The calculator uses the kVA formula:

Where:

• \( kW \) — Real power in kilowatts
• \( kVAR \) — Reactive power in kilovolt-amperes reactive

Explanation: This formula calculates the apparent power by finding the square root of the sum of squares of real power and reactive power, following the Pythagorean theorem in the power triangle.

3. Importance of kVA Calculation

Details: kVA calculation is essential for proper sizing of electrical equipment, determining power factor, and ensuring efficient power distribution in electrical systems.

4. Using the Calculator

Tips: Enter both kW and kVAR values as positive numbers. The calculator will compute the apparent power (kVA) which represents the total power in the system.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW, kVAR, and kVA?
A: kW is real power (does actual work), kVAR is reactive power (needed for magnetic fields), and kVA is apparent power (total power in the circuit).

Q2: How is power factor related to kVA?
A: Power factor = kW/kVA. It represents the ratio of real power to apparent power and indicates how effectively power is being used.

Q3: Why is kVA important for electrical equipment sizing?
A: Electrical equipment (transformers, generators) are rated in kVA because they must handle the total apparent power, not just the real power.

Q4: Can kVA be less than kW?
A: No, kVA is always equal to or greater than kW because it includes both real and reactive power components.

Q5: How do I improve power factor?
A: Power factor can be improved by adding capacitors to reduce reactive power (kVAR), which decreases the apparent power (kVA) for the same real power (kW).