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Electrical Engineering QUESTION #2137
Question 1
In a balanced three-phase star-connected system, what is the phase relationship between the line voltage $V_L$ and its corresponding phase voltage $V_{ph}$?
  • $V_L$ leads $V_{ph}$ by $30^\circ$✔️
  • $V_L$ lags $V_{ph}$ by $30^\circ$
  • $V_L$ and $V_{ph}$ are in phase
  • $V_L$ leads $V_{ph}$ by $120^\circ$
Correct Answer Explanation
In a star (Wye) connection, the line voltage is $\sqrt{3}$ times the phase voltage and leads the phase voltage by $30^\circ$.