Three Phase Amps to kVA Calculator by Tons of Concrete

Three Phase kVA Formula:

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

Apparent Power (kVA):

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1. What is a Three Phase Amps to kVA Calculator?

Definition: This calculator converts current (amps) to apparent power (kVA) in three-phase electrical systems.

Purpose: It helps electrical engineers and technicians determine the apparent power in kilovolt-amps from known voltage and current values.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

\( kVA \) — Apparent power (kilovolt-amps)
\( V \) — Voltage (volts)
\( I \) — Current (amps)
\( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The voltage and current are multiplied by the square root of 3 (for three-phase systems) and divided by 1000 to convert to kVA.

3. Importance of kVA Calculation

Details: kVA represents the total power in an AC circuit, including both real and reactive power. It's crucial for sizing transformers, generators, and other electrical equipment.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

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

Q2: Is this formula only for balanced three-phase systems?
A: Yes, this formula assumes a balanced load where all three phases carry equal current.

Q3: What voltage should I use - line-to-line or line-to-neutral?
A: Use line-to-line voltage (phase-to-phase voltage) for this calculation.

Q4: How do I calculate single-phase kVA?
A: For single-phase systems, use kVA = (V × I)/1000 (without the √3 factor).

Q5: Why is √3 used in three-phase calculations?
A: It accounts for the 120° phase difference between the three phases in a balanced system.