Surge arrester with a cage design, and a production method for it
AssigneeTridelta Uberspannungsableiter GmbH
InventorHartmut Klaube
Life of this patent
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Abstract
The invention relates to a surge arrester having a cage design, and to a method for its production. According to the invention, during extrusion-coating or encapsulation of a module comprising two end fittings (3) and a plurality of varistor blocks (1) and at least one reinforcing element (9) in order to form the outer housing (5), first through-holes (11) for the reinforcing element (9) thereof are sealed with silicone. For this purpose, second through-holes (15) are provided in the end fittings (3), through which the silicone runs during casting or spraying, and enters the through-holes (11) from the outside, in order in this way to seal them against water and moisture.
Claims7
A surge arrester having:
- at least one varistor block;
- two end fittings which are arranged on opposite sides of the varistor block;
- at least one reinforcing element, which holds the varistor block and the end fittings together and runs through a first hole through at least one of the end fittings;
- an outer housing composed of silicone which is formed by casting or spraying around the varistor block, the reinforcing element and parts of the end fittings;
- and
- a second through-hole formed in the at least one end fitting and open in a groove on that side of the end fitting which faces away from the varistor block, with the groove extending from the second through-hole to the first through-hole, and with the second through-hole, the groove and the first through-hole being sealed with silicone on that side of the end fitting which faces away from the varistor block.
Dependencies are inferred from the claim text.