In a delta configuration, how do the phase voltage and line voltage compare?

Prepare for the ABYC Advanced Electrical Exam with a focused quiz. Utilize flashcards and multiple-choice questions complete with hints and explanations. Boost your exam readiness effortlessly!

In a delta configuration, the relationship between phase voltage and line voltage is characterized by the fact that the phase voltage is equal to the line voltage. This occurs because in a delta system, each phase winding is connected across the line voltage directly. As a result, the voltage measured across each phase (which is the phase voltage) is the same as the voltage measured between any two lines (which is the line voltage).

This can also be understood by considering the geometry of how a delta is arranged, where each vertex is connected to one phase. Therefore, if you measure the voltage across any two lines, you are essentially measuring the same voltage as that across the entry points of each phase connected to the lines.

In contrast, in a wye (or star) configuration, the relationship is different—where the phase voltage is lower than the line voltage by a factor of √3. Understanding this configuration enables a clearer grasp of the principles of three-phase systems and their applications in electrical engineering.

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