1. What is Phase Voltage?

Phase voltage refers to the voltage measured between any one phase and the neutral point in a three-phase electrical system. It is a fundamental concept in electrical engineering for analyzing and designing three-phase power systems.

2. How Does the Calculator Work?

The calculator uses the phase voltage formula:

Where:

• \( V_{phase} \) — Phase voltage (volts)
• \( V_{line} \) — Line voltage (volts)
• \( \sqrt{3} \) — Square root of 3 (approximately 1.732)

Explanation: This formula converts line voltage (voltage between phases) to phase voltage (voltage between phase and neutral) in a balanced three-phase system.

3. Importance of Phase Voltage Calculation

Details: Accurate phase voltage calculation is essential for proper equipment sizing, protection device selection, and ensuring electrical system safety and efficiency in three-phase power systems.

4. Using the Calculator

Tips: Enter the line voltage in volts. The value must be positive and greater than zero for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line voltage and phase voltage?
A: Line voltage is the voltage between any two phases, while phase voltage is the voltage between any phase and the neutral point in a three-phase system.

Q2: When is this calculation applicable?
A: This calculation applies to balanced three-phase systems, typically in star (wye) configurations where the relationship holds true.

Q3: What is the typical value of √3 used in calculations?
A: The square root of 3 is approximately 1.732, which is the constant factor used to convert between line and phase voltages.

Q4: Does this formula work for delta configurations?
A: In delta configurations, phase voltage equals line voltage, so this conversion is not needed.

Q5: Why is this calculation important in electrical engineering?
A: Understanding the relationship between line and phase voltages is crucial for proper system design, equipment selection, and troubleshooting in three-phase power systems.