Lightning arrester for use in electric power transmission network, has casing with optically transparent section, where section has level indicator which is inserted into casing

摘要

The lightning arrester (1) has a deflecting current path and an insulating casing (2) surrounding the path, where the casing exhibits a tube-shaped structure. The path includes a varistor structure. The casing has an optically transparent section. An indicator of a monitoring mechanism is arranged with respect to an axis of a side of the casing, where the side is turned away from the path. The section has a level indicator (4), which is inserted into the casing.