What type of electrical equipment does the term "Full Voltage Non-Reversing" (FVNR) refer to?

The term "Full Voltage Non-Reversing" (FVNR) specifically refers to a type of motor starter that is designed to start a motor at full voltage without the capability to reverse its rotation. FVNR starters typically include contactors and overload protection to ensure safe operation while providing a simple means of controlling the motor's start and stop functions.

This is a key characteristic because FVNR starters are utilized in applications where reversing the motor is not necessary or desired. By allowing the motor to start at full voltage, FVNR starters can provide maximum torque from the moment the motor begins to operate, which is particularly useful for applications where immediate power is needed.

In contrast, the other choices do not fit the definition provided. Transformers are used for voltage conversion, circuit breakers are designed for protection and interrupting current flow, and relays control electrical circuits rather than directly starting motors. Thus, the association of FVNR specifically with motor starters underscores why this is the correct choice.