Abstract: A load interrupter switch for voltages in the kV range and having a vacuum interrupter chamber which is embraced without any air gaps by a sleeve formed from elastomeric material of high dielectric strength. The sleeve is clamped by half housings of the load interrupter switch. In this way, an external flashover of the high voltage between the end plates of the vacuum interrupter chamber is effectively suppressed during the switching operation without the need for liquid or gaseous media for this purpose. As a result, unlike conventional load interrupter switches there is no need for an extensive level of monitoring. Furthermore, the load interrupter switch does not pose the risk of leaking unobjectionable fluids or gases which may cause environmental hazards.