1. What is Three Phase Voltage?

Three phase voltage systems are common in power generation, transmission, and distribution. The voltage between any two lines is called line voltage, while the voltage between any line and neutral is called phase voltage.

2. How Does the Calculator Work?

The calculator uses the three phase voltage formula:

Where:

• \( V \) — Phase voltage (volts)
• \( V_{\text{Line}} \) — Line voltage (volts)
• \( \sqrt{3} \) — Approximately 1.732

Explanation: In a balanced three phase system, the phase voltage is equal to the line voltage divided by the square root of three.

3. Importance of Phase Voltage Calculation

Details: Understanding the relationship between line and phase voltage is essential for designing and troubleshooting three phase electrical systems, motor controls, and power distribution networks.

4. Using the Calculator

Tips: Enter the line voltage in volts. The calculator will compute the corresponding phase voltage. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: Is this calculation valid for all three phase systems?
A: This applies to balanced three phase systems with sinusoidal waveforms.

Q3: What is the typical line voltage in residential areas?
A: In many countries, common line voltages are 208V, 240V, 380V, or 480V for three phase systems.

Q4: Can I use this for delta and wye configurations?
A: This calculation specifically applies to wye (star) configurations. Delta configurations have different relationships.

Q5: Why is the square root of three used?
A: It comes from the trigonometric relationship between the 120° phase shifted voltages in a three phase system.