1. What is KVAR?

KVAR (Kilo Volt-Ampere Reactive) is a unit of measurement for reactive power in an AC electrical system. It represents the power that oscillates between the source and load, doing no real work but necessary for maintaining voltage levels.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( KVA \) — Apparent power in kilovolt-amperes
• \( KW \) — Real power in kilowatts

Explanation: This formula calculates reactive power from apparent power and real power using the power triangle relationship in AC circuits.

3. Importance of KVAR Calculation

Details: Calculating KVAR is essential for power factor correction, system efficiency analysis, and proper sizing of capacitors in electrical systems to reduce reactive power demand.

4. Using the Calculator

Tips: Enter KVA and KW values (both must be positive, and KVA must be greater than or equal to KW). The calculator will compute the corresponding KVAR value.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between KVA, KW, and KVAR?
A: KVA is apparent power (total power), KW is real power (usable power), and KVAR is reactive power (non-working power that maintains voltage).

Q2: Why is reactive power important?
A: Reactive power is necessary for magnetic field creation in motors and transformers, but excessive reactive power can reduce system efficiency and increase costs.

Q3: How can I reduce KVAR in my system?
A: Install power factor correction capacitors that supply reactive power locally, reducing the reactive power drawn from the utility.

Q4: What is power factor?
A: Power factor is the ratio of real power (KW) to apparent power (KVA), expressed as: PF = KW/KVA.

Q5: When should I use this calculation?
A: Use this calculation when designing electrical systems, analyzing power quality, or implementing power factor correction measures.