Why the phase to phase is 415V and phase to neutral is 190V

Explain why the phase to phase is 415V and the phase to neutral is 190V

  1. 415/√3=240V approximately.

Your line to neutral should be 240 V. In phase to neutral the voltage measurement is done with respect to neutral and that’s why phase to phase and phase to neutral have different voltage measurement.

Check there must be a leakage in your circuits. Test N to E, the difference will be found there. To check N to E you have to ensure that Transformer Neutral is connected with Earth.

  1. If you are using a small cross-sectional area cable for a long-distance load, it’s possible because of voltage drop. In that case, you need to determine the drop based on your cable size and select a bigger cable with minimal voltage drop.