In a three-phase system with line-to-line voltage of 460 V, if connected in Delta, what is the phase voltage?

In a three-phase system with line-to-line voltage of 460 V, if connected in Delta, what is the phase voltage?

• A. 460 V
• B. 460/√3 V
• C. 265 V
• D. 800 V

Answer: (A)

In a Delta three-phase system, each winding is connected directly between two lines, so the voltage across a winding (the phase voltage) is the same as the line-to-line voltage. With a line-to-line voltage of 460 V, the phase voltage is 460 V. If it were a Y (wye) configuration, the phase voltage would be the line voltage divided by √3, but that’s not the case here. Therefore, the phase voltage is 460 V.

In a Delta three-phase system, each winding is connected directly between two lines, so the voltage across a winding (the phase voltage) is the same as the line-to-line voltage. With a line-to-line voltage of 460 V, the phase voltage is 460 V. If it were a Y (wye) configuration, the phase voltage would be the line voltage divided by √3, but that’s not the case here. Therefore, the phase voltage is 460 V.