Switch assembly, a switching device comprising a switch assembly, a switchgear comprising a switching device and a method for cooling

A switch assembly comprising a vacuum switch mounted to an at least partly electrically conductive housing, and comprising vacuum bottle holder for holding a vacuum bottle of the vacuum switch, which vacuum bottle holder is connected to the housing, characterised in that the housing comprises at least one gas entry opening at a lower end of the housing and at least one gas exit opening at an upper end of the housing, and that a first free heat convection path is provided inside the housing between the at least one gas entry opening and the at least one gas exit opening, in order to provide cooling, and in that

• the vacuum bottle holder comprises an upper end connected to the housing, a holder wall surrounding the vacuum bottle and a lower end, that the vacuum bottle holder further comprises at least one gas entry opening at the lower end thereof and at least one gas exit opening at the upper end thereof, and that a free space is provided between the vacuum bottle and the holder wall of the vacuum bottle holder such that a second free heat convection path is provided from the at least one gas entry opening of the vacuum bottle holder to the at least one gas exit opening of the vacuum bottle holder, via said free space, in order to provide cooling.