Transcription of CHAPTER-7 circuit breaker. - IIT Roorkee
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CHAPTER-7 circuit breaker. - IIT Roorkee
367 CHAPTER-7 HIGH VOLTAGE circuit breaker Introduction circuit breaker is a mechanical switching device capable of making, carrying and breaking current under normal circuit condition as well as under specified abnormal circuit condition such as short circuit etc. circuit breakers are generally classified according to interrupting medium used to cool and elongate electrical arc permitting interruption. Selection of outdoor circuit breakers for switchyards 12 kV and above (highest system voltage) as regards types, rating, performance requirements and tests for AC high voltage circuit breakers that are installed in hydro power stations outdoor switchyards after the step up transformer on outgoing transmission line feeders are discussed.
The dead-tank breaker does require additional insulating gas to provide the insulation between the interrupter and the grounded tank enclosure. Live-tank circuit breakers consist of an interrupter that is mounted on insulators and is at line potential.
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