3 Phase Voltage to kVA Calculation

3 Phase kVA Formula:

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

kVA:

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1. What is 3 Phase Voltage to kVA Calculation?

Definition: This calculator converts three-phase voltage and current values to apparent power in kilovolt-amperes (kVA).

Purpose: It helps electrical engineers and technicians determine the apparent power in three-phase AC systems.

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-to-line voltage (volts)
I — Current (amps)
√3 — Constant for three-phase systems (≈1.732)

Explanation: The formula accounts for the phase difference in three-phase systems by including the √3 factor.

3. Importance of kVA Calculation

Details: kVA represents apparent power in AC circuits and is crucial for sizing transformers, generators, and circuit protection devices.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts and current in amps. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kVA and kW?
A: kVA is apparent power (voltage × current), while kW is real power (kVA × power factor).

Q2: Is this for line-to-line or line-to-neutral voltage?
A: The formula uses line-to-line (phase-to-phase) voltage.

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 power factor for calculations?
A: This calculator doesn't use power factor. For kW calculations, typical power factors range from 0.8 to 0.95.

Q5: How accurate is this calculation?
A: It provides theoretical apparent power. Actual system performance depends on load characteristics and power quality.