Comparison between measured and calculated temperatures in SF, arcs shows that the values of the net emission coefficients calculated by various authors are, in all cases, too low. This underestimation of the emission coefficient is of the order of two io three
A physical model of an SF6 circuit-breaker arc was developed to study the behaviour of the arc as zero current is reached and to analyse its interaction with the circuit. The role of turbulence, processed using the mixing length model adjusted with experimental results, is an essential factor in the extinction of the arc. The variations of post-arc current were calculated as a function of the rate of rise of recovery voltage (RRRV) and of the time lag before application of this transient voltage. The authors then linked their physical arc model to a circuit model. Calculation of the arc-circuit interaction showed that the disturbances brought about in the RRRV by the presence of the arc should be taken into account, since they modify the post-arc current and thus the interrupting capability of the circuit-breaker.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.