Which drawing indicates an autotransformer connection?

An autotransformer connection is characterized by the presence of a single winding that serves as both the primary and secondary winding. This design allows the transformer to provide variable voltage output while maintaining a compact form factor.

In the context of the drawing options, the correct choice is based on the specific representation of an autotransformer, which typically includes a clear depiction of this single winding arrangement along with taps that represent different voltage output levels.

This choice correctly indicates the unique configuration of an autotransformer, often shown with an overlapping design of the primary and secondary circuits, rather than separate windings as seen in traditional transformers. An understanding of the visual representation of autotransformers in schematics is essential for recognizing their application in voltage regulation and distribution systems.

Being able to identify this is crucial for electrical professionals as it impacts system design, efficiency, and operational performance in various electrical contexts.