On-load tap changer
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United States of America Patent
Stats
-
Jun 4, 1996
Grant Date -
N/A
app pub date -
Jan 3, 1995
filing date -
Jul 9, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tap selector for an on-load tap changer includes two tap selector shafts (3, 4) made of metallic material and placed inside current collector rings (22). Movable contacts (6, 7) of the selector are supported by the shafts (3, 4) via contact holders (8) of insulating material. Between each current collector ring (22) and the shafts (3, 4) an insulating ring (21) is arranged. The fixed contacts (11) of the selector are supported by an electrically insulating, circular hollow cylinder (9) with a closed circumference, the contacts (11) being fixed to the cylinder wall by axial deformation. The cylinder (9) is provided with holes (10) for inspection and mounting. Each current collector ring (22) is connected by a screw joint to a current collector arm (24), which projects through a hole in the cylinder wall (9). Axial adjustment of the current collector arm (24) can be achieved by making the contact surfaces (25, 26) between the arm (24) and the ring (22) in the screw joint circularly curved in shape.
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