1. What is a Three Phase Voltage Calculator?

Definition: This calculator converts between phase voltage and line voltage in three-phase electrical systems.

Purpose: It helps electrical engineers, technicians, and students quickly determine line voltage from phase voltage in balanced three-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{line} \) — Line-to-line voltage (volts)
• \( V_{phase} \) — Phase voltage (volts)
• \( \sqrt{3} \) — Constant (approximately 1.732)

Explanation: In balanced three-phase systems, the line voltage is √3 times the phase voltage due to the 120° phase difference between phases.

3. Importance of Three Phase Voltage Calculation

Details: Proper voltage calculation is essential for equipment selection, circuit design, and ensuring compatibility between different components in three-phase systems.

4. Using the Calculator

Tips: Simply enter the phase voltage in volts. The value must be > 0. The calculator will automatically compute the corresponding line voltage.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between phase and line voltage?
A: Phase voltage is measured between any phase and neutral, while line voltage is measured between two phases.

Q2: Is this calculation valid for all three-phase systems?
A: This applies specifically to balanced three-phase systems with 120° phase separation.

Q3: What's a typical phase voltage in residential systems?
A: In many countries, residential three-phase systems use 230V phase voltage, resulting in 400V line voltage.

Q4: How do I calculate phase voltage from line voltage?
A: Use the inverse formula: \( V_{phase} = V_{line} / \sqrt{3} \).

Q5: Does this apply to delta and wye configurations?
A: This relationship specifically applies to wye configurations. In delta configurations, line and phase voltages are equal.