Abstract. After being in the focus of sciences' and industry's research and development activities for many years, the investigation of possible SF 6 (sulfur hexafluoride) gas-alternatives has been even more intensified after the revision of the European regulation on fluorinated gases in 2014. This contribution focuses on the scientific assessment of the technical performance of several SF 6 gas-alternatives -gases and gas mixtures -currently under discussion. Therefore, a reference experimental setup, that allows the determination of the arc quenching capability of different gases as well as the axial resistance distribution of the switching arc around current zero crossing, is developed. Additionally, first experimental results for the thermal interruption capability and the arc resistance distribution of SF 6 and possible SF 6 gas-alternatives are shown.
Abstract. To conduct the mainly active load current test duty according to IEC 62271-103, a directly powered test circuit and therefore a medium voltage connection or a power generator is needed. A newly developed synthetic test circuit allows to replicate the current as well as the full transient recovery voltage (TRV) and the power frequent recovery voltage (RV) of the direct test circuit up to its crest value. It is dimensioned for voltage classes up to 52 kV and can be adapted to test currents between 630 A and 1250 A. The test circuit allows a detailed investigation of load break switches without costly high power sources and loads. Many parameters, like current and voltage steepness at current zero, as well as different parameters defining the TRV steepness can be varied individually.
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.