NCTI Service Technician Practice Exam

Question: 1 / 685

How are the coils wound in an out-of-phase transformer?

In the same direction

In opposite directions

In an out-of-phase transformer, the coils are wound in opposite directions. This is essential for creating a condition where the magnetic fields of the two windings oppose each other, leading to a phase difference between the input and output voltages. When the coils are wound in this manner, the induced voltage in one coil will be of opposite polarity to that in the other coil, which causes the winding to operate effectively as an out-of-phase transformer. This principle is crucial in applications where phase relationships are important, such as in certain types of electrical circuits and systems that require voltage transformation while maintaining specific phase characteristics. The other configurations mentioned, such as winding in the same direction, spiral, or circular patterns, do not achieve this necessary phase opposition.

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In a spiral configuration

In a circular pattern

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