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- W4251285487 abstract "Abstract Today's electric power system consists of large and small generating stations, transformers, transmission lines, distribution lines, reactors, capacitors, and induction motors. Most of the time a power system operates in its normal mode of operation. However, natural events such as lightning, wind, ice, earthquake, fire, explosions, falling trees, flying objects, physical contact by animals or humans, contamination, and personnel errors can result in short circuits. Short circuits, also known as faults, will change the status of a power system from a normal state to an abnormal state. Protective relays are in wide use throughout power systems to detect abnormal modes of operation. They are relatively small electromechanical, solid‐state, or computer (microprocessor‐based) devices that sense the abnormal modes of operation through instrument transformers. A protective relay identifies short circuits or other problems quickly, and initiates circuit breaker tripping to isolate the faulty component. Consequently, a minimum amount of the circuit is disconnected and a high level of service continuity is achieved. Protective relays do not prevent failures, but they mitigate undesirable effects of faults and failures and minimize failed equipment damage. Well‐designed protective relay equipment have high levels of reliability, speed, sensitivity, selectivity, and economics. A secondary function of protective relays is to provide information regarding the location and type of failure. This information assists in locating and repairing faulty equipment. It also provides a means for assessing the effectiveness of a protection scheme based on the level of damage that occurred." @default.
- W4251285487 created "2022-05-12" @default.
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- W4251285487 date "2017-08-15" @default.
- W4251285487 modified "2023-09-26" @default.
- W4251285487 title "Relay Protection" @default.
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- W4251285487 doi "https://doi.org/10.1002/047134608x.w6136.pub2" @default.
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