Importance

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Abstract

A three-phase isolating disconnector for use in a high-voltage switchgear arrangement in two gas-filled chambers, separated by a wall, in said arrangement, comprising for each phase a disconnector member extending through the wall and fastened and movable therein, this disconnector member being provided with a disconnector contact in each chamber, and comprising two fixed counter disconnector contacts which are connected to other parts of the switchgear arrangement and of which one is disposed in one chamber and the other in the other chamber. The movable disconnector member is brought by rotation from a first position, in which it conductively connects together the two fixed counter disconnector contacts, to a second position in which the conductive connection is broken and in which at least one disconnector contact of the movable disconnector member is connected to an earth contact, and vice versa. The three disconnector members are embodied in the form of rotating shafts which are disposed in one plane and which can be rotated from the outside, each of them being housed in a separate bushing insulator in the wall. The two disconnector contacts of each disconnector member are each fastened to a contact holder around the rotating shaft, each of them extending, transversely in relation thereto, in a plane parallel to the wall and, on rotation from the first to the second position of the disconnector member, moving over a circle sector of 180.degree..

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First Claim