This presentation reviews the established principles and the advanced aspects of the selection and application of protective relays in the overall protection system, multifunctional numerical devices application for power distribution and industrial systems, and addresses some. This presentation reviews the established principles and the advanced aspects of the selection and application of protective relays in the overall protection system, multifunctional numerical devices application for power distribution and industrial systems, and addresses some. SIPROTEC 5, built on extensive field experience, offers comprehensive functionalities and device types for modern electrical energy systems. Its modular design and powerful DIGSI 5 engineering tool provide tailored solutions. This tool gives a quick guidance to find a SIPROTEC 5 protection relay. The Protective Control Relay Systems Training Course by EuroMaTech offers in-depth knowledge of how protection relays and automation systems function within medium to large power generation and distribution networks. For 2011, Alstom has capitalised on its pool of experts at the St Leonards Centre of Excellence in Stafford. SEL relays detect faults and other abnormal conditions in electric power systems and initiate protective actions to maintain system stability and safety. One of the promising ways to develop protection and control systems is the development of fundamentally new algorithms for recognizing emergency modes. The selection and applications of.