In a Y-connected system with line voltage V_L = 600 V, what is the phase voltage V_ph?

In a Y-connected system with line voltage V_L = 600 V, what is the phase voltage V_ph?

• A. 346.41 V
• B. 600 V
• C. 346.41 kV
• D. 1200 V

Answer: (A)

In a Y-connected system, the line-to-line voltage is sqrt(3) times the line-to-neutral (phase) voltage. So the phase voltage is obtained by dividing the line voltage by sqrt(3). With a line voltage of 600 V, the phase voltage is 600 / sqrt(3) ≈ 346.41 V. This is the voltage from one line to the neutral. The other options misstate the relationship or mix up units.

In a Y-connected system, the line-to-line voltage is sqrt(3) times the line-to-neutral (phase) voltage. So the phase voltage is obtained by dividing the line voltage by sqrt(3). With a line voltage of 600 V, the phase voltage is 600 / sqrt(3) ≈ 346.41 V. This is the voltage from one line to the neutral. The other options misstate the relationship or mix up units.