Surge arrester and associated manufacturing method

A surge arrester, comprising:

• an active part extending along a longitudinal direction of the surge arrester;
• a first electrode arranged to rest against a first end of the active part, the first electrode having a first interlocking part arranged at a side of the first electrode facing an inner surface of the flexible insulating housing in a shape of a protrusion;
• a second electrode resting against a second end of the active part, wherein the second end opposes the first end in the longitudinal direction of the surge arrester;
• a flexible insulating housing, being arranged around an assembly of the first electrode, the active part and the second electrode;
• and
• a second interlocking part formed on an inner surface of the flexible insulating housing, the second interlocking part arranged on the inner surface of the flexible insulating housing in a shape of a recess;
• the first interlocking part of the first electrode arranged to fit with the second interlocking part of the flexible insulating housing for preventing relative movement of the first electrode and the flexible insulating housing in the longitudinal direction of the surge arrester;
• and
• the flexible insulating housing including:
• a support member mechanically connecting and supporting the assembly of the first electrode, the active part and the second electrode, which has a plurality of supporting elements being arranged parallel to the longitudinal direction of the surge arrester and being arranged laterally at sides of the assembly of the first electrode, the active part and the second electrode;
• and
• an insulating expandable part with a plurality of sheds extending outwards, being moulded around the support member to mechanically connect the plurality of supporting elements, the insulating expandable part being spaced apart from the assembly of the first electrode, the active part and the second electrode.