What type of three-phase connection exists if the line voltage equals the phase voltage?

What type of three-phase connection exists if the line voltage equals the phase voltage?

• A. Wye connection
• B. Delta connection
• C. Series connection
• D. Parallel connection

Answer: (B)

In a three-phase system, when the line voltage equals the phase voltage, this scenario typically describes a delta connection. In a delta connection, each phase is connected directly to the line voltage, meaning that the voltage across each phase is the same as the voltage measured between any two lines in the system. In contrast, in a wye (or star) connection, the phase voltage is equal to the line voltage divided by the square root of three. This means that the line voltage is higher than the phase voltage in a wye configuration. As for series and parallel connections, these terms usually refer to configurations of components rather than the phase relationships in three-phase systems, making them irrelevant in this context. The characteristic of the delta connection where the line voltage equals the phase voltage is a fundamental aspect of understanding how these systems are analyzed and utilized in electrical engineering, particularly for power transmission and distribution.

In a three-phase system, when the line voltage equals the phase voltage, this scenario typically describes a delta connection. In a delta connection, each phase is connected directly to the line voltage, meaning that the voltage across each phase is the same as the voltage measured between any two lines in the system.

In contrast, in a wye (or star) connection, the phase voltage is equal to the line voltage divided by the square root of three. This means that the line voltage is higher than the phase voltage in a wye configuration. As for series and parallel connections, these terms usually refer to configurations of components rather than the phase relationships in three-phase systems, making them irrelevant in this context.

The characteristic of the delta connection where the line voltage equals the phase voltage is a fundamental aspect of understanding how these systems are analyzed and utilized in electrical engineering, particularly for power transmission and distribution.