| 摘要 |
PCT No. PCT/SE97/00140 Sec. 371 Date Nov. 2, 1998 Sec. 102(e) Date Nov. 2, 1998 PCT Filed Jan. 29, 1997 PCT Pub. No. WO97/31380 PCT Pub. Date Aug. 28, 1997A surge arrester for high system voltages is provided. The arrester comprises an elongated column composed of a plurality of coaxially arranged valve units. The column is mechanically divided into an upper and a lower column part, and the two column parts are interconnected via a moment-limiting articulated member. The articulated member has an upper bearing plate with a concave sliding surface, which makes contact with a convex sliding surface of a lower bearing plate. The upper bearing plate is connected to the grounded stand of the arrester via tensionally prestressed, insulating links. The articulated member comprises a number of springs, adapted to the stiffness of the lower column part, to keep the two bearing plates correctly positioned relative to each other in the transversal direction.
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