Disconnector device for a surge arrester and a protection assembly comprising a surge arrester connected to such a disconnector device

A disconnector device for a surge arrester, the disconnector device comprising: a housing encompassing a cavity; a disconnector unit provided inside the cavity, having a first terminal that is connectable to the surge arrester, a second terminal that is connectable to ground potential, a member provided at the second terminal and being fitted to the housing, and a disconnector cartridge provided in the cavity; wherein the housing forms an inner housing of a housing unit, the housing unit comprising further an outer housing, and wherein the inner housing comprises at least one ventilation opening connecting the cavity to an outside of the inner housing, and wherein the outer housing comprises at least one further ventilation opening connecting the outside of the inner housing to an outside of the disconnector device for releasing gases from the operating disconnector cartridge, and wherein the at least one ventilation opening and the at least one further ventilation opening are displaced against one another such that a labyrinth with a gas escape path for the gases from the operating disconnector cartridge is formed. An overload protection assembly, comprising a high voltage surge arrester and the disconnector device.