This document outlines laboratory experiments focused on various electrical protection relays, including IDMT Over Current, Differential, and Negative Sequence relays. 1College of Electric Power, South China University of Technology, Guangzhou, China 2Training and Knowledge Transformation Department, CYG SUNRI CO. It details objectives, apparatus, theoretical background, procedures, and results for each experiment, emphasizing safety protocols. The DB-DL07 Power Automation and Relay Protection Experimental Device is a novel experimental device designed and developed by integrating teaching content from multiple professional courses in higher education institutions, including "Relay Protection," "Electrical Equipment," "Automatic Devices,". As Traditional relay protection experimental instruction predomi-nantly employs electromagnetic relays, which confront three criti-cal limitations: (1) Obsolete hardware iterations result in monot-onous experimental scenarios; (2) Fixed-function simulation de-vices fail to replicate complex. This document outlines various electrical engineering experiments, including the operation of overcurrent relays, testing of circuit breakers, and the study of distance protection relays. Each experiment details objectives, required apparatus, theoretical background, and results, providing a.
