1. What is Phase to Phase Voltage?

Phase to phase voltage (V_pp) is the voltage measured between any two phases in a three-phase electrical system. For solar panel systems, understanding this voltage is crucial for proper system design and safety.

2. How Does the Calculator Work?

The calculator uses the phase to phase voltage formula:

Where:

• \( V_{pp} \) — Phase to phase voltage (volts)
• \( V_{pn} \) — Phase to neutral voltage (volts)
• \( \sqrt{3} \) — Approximately 1.732 (constant for three-phase systems)

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

3. Importance in Solar Panel Systems

Details: Correct voltage calculation is essential for selecting appropriate inverters, wiring, and protection devices in solar installations. It ensures system efficiency and compliance with electrical codes.

4. Using the Calculator

Tips: Enter the phase to neutral voltage in volts. The value must be positive. The calculator will compute the corresponding phase to phase voltage.

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in the calculation?
A: The √3 factor comes from the trigonometric relationship between phase voltages in a balanced three-phase system (120° phase separation).

Q2: Is this calculation valid for all three-phase systems?
A: Yes, for balanced three-phase systems. For unbalanced systems, more complex calculations are needed.

Q3: What's typical V_pn for solar systems?
A: Common values are 120V, 230V, or 277V, depending on the country and system design.

Q4: How does this affect inverter selection?
A: Inverters must be rated for the maximum expected phase to phase voltage in the system.

Q5: Does this apply to both AC and DC sides?
A: The √3 relationship is for AC three-phase systems. DC solar arrays have different voltage calculations.