Which of the following is NOT a function of a control relay?

A control relay plays several vital roles in electrical motor control systems. One of its primary functions is to switch electrical circuits. This allows the relay to open or close connections in response to a control signal, thus enabling or disabling the flow of electricity to various components.

The control relay also facilitates control over high voltage devices. By acting as an intermediary, the relay can manage higher power circuits safely without exposing lower-voltage components to the risk that high voltage presents.

Monitoring system performance typically falls outside the main functions of a control relay. This role is often fulfilled by more sophisticated systems like sensors or monitoring devices designed to provide real-time feedback on operational parameters.

Enhancing power quality is generally associated with devices specifically designed to manage power factors, harmonics, and voltage levels. While control relays can impact these factors indirectly through switching operations, their primary role does not include innovative techniques or mechanisms specifically aimed at improving power quality.

Therefore, since enhancing power quality is not a primary function of control relays, it is the correct choice for identifying what is NOT a function of a control relay.