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To achieve a high level of continuity of electricity supply and to minimise outage times, it is essential to provide suitable protection schemes and relay settings to ensure that faults are quickly disconnected. This reference book, written for professional engineers and students, gives both practical and theoretical coverage of the technologies involved in maintaining supplies. It covers: the calculation of short-circuit currents; the classification and function of relays; current and voltage transformers; overcurrent protection; fuses, reclosers and sectionalisers; directional overcurrent relays; differential protection; distance protection; protection of industrial systems; industrial plant load shedding; protection schemes and substation design diagrams; processing alarms; and the installation, testing and maintenance of protection systems. |