This document discusses generator protection. It explains that generators come in a wide range of sizes and have complex protection needs due to their connections. Generator protection aims to address various fault types that can occur in the stator or rotor windings, including phase-to-phase, phase-to-ground, and inter-turn faults. Differential protection and other schemes are used to detect and isolate different fault types. The protection must also address abnormal operating conditions like overloading, overspeeding, and loss of excitation. Effective generator protection involves several coordinated protective devices.