Relay Setting and Co-ordination

This course provides a comprehensive understanding of protective relay settings and coordination used in electrical power systems. It explains the principles of protection for generators, transformers, motors, transmission lines, and distribution networks. Participants learn how to select suitable protective relays based on system requirements and fault conditions. The course covers calculation and application of relay pickup currents, time settings, and operating characteristics. It introduces overcurrent, earth-fault, differential, distance, and other commonly used protection schemes. Special emphasis is given to achieving proper coordination between primary and backup protection devices. Participants learn how to develop time-current coordination curves and evaluate relay operating sequences. The course also addresses fault-current calculations and their importance in determining relay settings. Practical approaches to minimizing unnecessary tripping while ensuring fast fault clearance are discussed. By the end of the course, participants can apply relay coordination principles to improve the reliability, selectivity, and safety of electrical power systems.