1. What is 3 Phase Voltage?

Three-phase voltage refers to the system where three alternating currents reach their instantaneous peak values at different times. It's widely used in power generation, transmission, and industrial applications.

2. How Does the Calculation Work?

The calculator uses the 3 phase voltage formula:

Where:

• \( V_{LL} \) — Line-to-line voltage (volts)
• \( V_{LN} \) — Line-to-neutral voltage (volts)
• \( \sqrt{3} \) — Approximately 1.732

Explanation: In a balanced three-phase system, the line-to-line voltage is √3 times the line-to-neutral voltage.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for proper equipment sizing, power system design, and ensuring electrical safety in three-phase systems.

4. Using the Calculator

Tips: Enter the line-to-neutral voltage in volts. The value must be positive.

5. Frequently Asked Questions (FAQ)

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

Q2: What are common three-phase voltage levels?
A: Common voltages include 208V/120V, 480V/277V, and 400V/230V (line-to-line/line-to-neutral).

Q3: Why is √3 used in three-phase calculations?
A: The √3 factor comes from the 120° phase shift between the three phases in a balanced system.

Q4: Can this calculation be used for unbalanced systems?
A: No, this simple calculation only applies to balanced three-phase systems.

Q5: How does this relate to three-phase power calculations?
A: Three-phase power (P) is calculated as P = √3 × V_LL × I × PF, where I is current and PF is power factor.