Generator Capacity in kVA Calculator

Generator Capacity Formula:

\[ \text{kVA} = \frac{V \times I \times \sqrt{3}}{1000} \]

Generator Capacity (kVA):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Generator Capacity in kVA?

Definition: This calculator determines the apparent power (kVA) of a three-phase generator based on voltage and current measurements.

Purpose: It helps electrical engineers, technicians, and generator operators understand the capacity of their equipment.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{kVA} = \frac{V \times I \times \sqrt{3}}{1000} \]

Where:

kVA — Apparent power (kilovolt-amperes)
V — Line voltage (volts)
I — Line current (amps)
√3 — Constant for three-phase systems (≈1.732)

Explanation: The formula calculates the total apparent power in a balanced three-phase system.

3. Importance of kVA Calculation

Details: Knowing generator capacity ensures proper equipment sizing, prevents overload conditions, and helps match load requirements.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts and the line current in amps. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kVA and kW?
A: kVA measures apparent power (volts × amps), while kW measures real power. The ratio between them is the power factor (PF = kW/kVA).

Q2: Why use √3 in the formula?
A: The √3 factor accounts for the phase difference in three-phase systems (120° between phases).

Q3: Can I use this for single-phase systems?
A: No, for single-phase use kVA = (V × I)/1000 (without the √3 factor).

Q4: What's a typical voltage for generators?
A: Common voltages include 208V, 240V, 480V, or higher for industrial applications.

Q5: How does power factor affect generator capacity?
A: The generator's kW capacity is kVA × power factor. Most generators have a 0.8 PF rating (e.g., 100kVA = 80kW at 0.8 PF).