Which diagram in the electrical schematics represents the operation of an interval relay?

The correct choice identifies the specific function of an interval relay within electrical schematics. An interval relay is designed to operate after a predetermined time period, engaging or disengaging a circuit based on the set time interval. In schematic diagrams, the representation of such a relay typically includes symbols that indicate time-delay operations.

The selected diagram shows the characteristics commonly associated with interval relays, such as timing components and the method by which they are connected within the circuit. This ensures clarity regarding the relay's function, allowing it to effectively control electrical components based on time rather than just an input signal.

Understanding the distinguishing features of diagrams is crucial as different types of relays—like latching, normally open, or normally closed—have unique symbols and configurations. Familiarity with these symbols helps in reading and interpreting electrical schematics accurately, ensuring correct implementation in practical applications.