In a step regulator, how is the primary winding connected to the line?

In a step regulator, the primary winding is connected to the line in a parallel configuration. This connection is fundamental in allowing the step regulator to manage voltage levels effectively while keeping the load current flowing through the primary winding.

When connected in parallel, the regulator can adjust the voltage as needed without interrupting the continuity of the electrical service. This setup is essential for maintaining voltage stability in the electric distribution system, especially during fluctuations in load demand. The regulator steps up or steps down the voltage depending on the requirements, and the parallel connection ensures that it can do so without impacting the operation of other components in the electrical system.

Other configurations like series connections would disrupt the continuity of the line and can lead to interruptions in service, which is not suitable for applications where maintaining a constant voltage is critical.