1. What is the Relation Between kVA and kW?

Definition: This calculator converts between real power (kW) and apparent power (kVA) using the power factor.

Purpose: It helps electrical engineers and technicians understand the relationship between these two important power measurements.

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 is divided by the power factor to calculate the apparent power needed in the system.

3. Importance of Power Factor

Details: Power factor represents the ratio of real power to apparent power. A higher power factor (closer to 1) indicates more efficient power usage.

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.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical power factor value?
A: For most industrial loads, power factor ranges from 0.8 to 0.95. Residential power factors are often around 0.9.

Q2: Why is apparent power (kVA) important?
A: kVA determines the size of equipment needed (transformers, generators) as it represents the total power flowing in the system.

Q3: How can I improve power factor?
A: Power factor correction capacitors can be added to the system to bring the power factor closer to 1.

Q4: What happens if power factor is too low?
A: Low power factor causes inefficient power usage, increased current flow, and potential utility penalties.

Q5: Can power factor be greater than 1?
A: No, power factor ranges from 0 to 1 in normal operating conditions.