Phase to Voltage Calculator | Convert Phase Voltage to Line Voltage

Work & Installation — Input to Output Summary

Inputs:

• Connection Type (Star or Delta)
• Known Voltage (Phase or Line)
• System Type (3-Phase AC)

• Select connection type: Star (Y) or Delta (Δ).
• Enter either Phase Voltage (VP) or Line Voltage (VL).
• The calculator applies:
  Star: \( V_{L} = \sqrt{3} \times V_{p} \)
  Delta: \( V_{L} = V_{p} \)
• Output displays both voltages clearly with the correct unit (V).

Output:

• Phase Voltage (VP)
• Line Voltage (VL)
• Connection type indication (Y or Δ)

Installation / Use: Use calculated values for selecting appropriate transformers, motors, circuit breakers, and insulation ratings in three-phase installations.

Testing and Final Adjustments

Check the results with a multimeter or power analyzer at the line and phase terminals after computing them. To make a star connection, measure between two lines, and the line voltage between one line and the neutral phase voltage. Make ensure that the proportion between them is close to √3 (≈ 1.732). In the case of delta systems, they should be equal. Ensure that the labels on terminals are correct to avoid an imbalance in phases or a short-circuit. Check insulation resistance to verify that the system can operate safely at the calculated voltages. To make final adjustments, again Check the wiring of the motors or transformers, and be sure that all terminal connections are tight and that they are rated to the desired voltage. Proper testing helps to avoid the stress of equipment, ensure the necessary reliability of It's work, and guarantees system safety.