What is the purpose of a transformer in an electric control circuit?

The purpose of a transformer in an electric control circuit is primarily to convert energy, specifically changing the voltage of alternating current (AC) between different levels. Transformers work on the principle of electromagnetic induction and are designed to step up (increase) or step down (decrease) voltage as required for the operation of various electrical devices and systems. This voltage transformation makes it possible to efficiently transmit electricity over long distances and allows equipment connected to the control circuit to operate at the appropriate voltage levels for safety and functionality.

In addition to the main purpose of energy conversion, transformers help in isolating different components of the electrical system, providing safety and reducing the risk of electrical shock. The transformer does not directly facilitate flow regulation, signal amplification, or temperature measurement, which are the functions of other types of components and devices in electrical engineering.