Switchgear Protections - Study Mode

Explanation

Solution: A fuse in a motor circuit primarily provides protection against short-circuit and overload conditions. Short-circuit Protection: In the event of a short-circuit, where a low-resistance path is created between two conductors, a large current surge flows through the circuit. This can damage the motor and other components. The fuse interrupts the circuit when the current exceeds its rated value, preventing damage by quickly melting and opening the circuit. Overload Protection: Overload conditions occur when the current drawn by the motor exceeds its rated value for an extended period. This can happen due to mechanical issues, such as increased friction, or electrical issues, such as voltage fluctuations. The fuse protects against overload by melting and opening the circuit when the current exceeds its rated value for a sustained period. Therefore, Option B correctly identifies that a fuse in a motor circuit provides protection against both short-circuit and overload conditions.