This chapter first considers the basic principles of current interruption and the influence of the type of fault produced by the connected network. The electrical characteristics of circuit-breakers are described. The formation of an electric arc during the current interruption process is indicated and the significance of the manner in which the arc is controlled and then extinguished is explained. Various means for achieving such control and with different arcing media are considered. Some basic performance limiting factors are discussed. The chapter concludes by discussing some evolving trends in response to various modern requirements such as environmental issues.
Gas-filled interrupters - fundamentals, Page 1 of 2
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