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AssigneeMaschinenfabrik Reinhausen GmbH
InventorsHubert ZWIRGLMAIER, Silke WREDE, Thomas SCHUSTER, Ulli LAUBEREAU, Gerhard BAEUML
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The invention relates to a selector switch (1) for tap-changing transformers. The selector switch (1) has a tap selector (37) in the oil tank (18) of said selector switch (1). In accordance with the invention, two separate zero contacts (73, 74) belong to each phase (L1, L2, L3) to be switched by the tap selector (37). The zero contacts (73, 74) are each arranged on a wall (17) of the oil tank (18) and reach through the wall (17). The invention also relates to a support arm (62) of a tap selector (37) of a selector switch (1). The support arm (62) has a first lateral rib (65) and a second lateral rib (66) and at least one web-like elevation (67) extending along a length (L) of the support arm (62) is formed between the first lateral rib (65) and the second lateral rib (66).
A load selector for tapped transformers, the load selector comprising:
A support arm of a preselector of a load selector with a mounting section and a free end that is formed opposite the mounting section and at which a fastening position for a contact bridge is provided, wherein the support arm is formed with a first lateral rib, a second lateral rib and between the first lateral rib and the second later rib at least one web-like elevation extending along a full length of the support arm.
The support arm according to claim 12, wherein the electrically nonconductive material is a plastic.
Dependencies are inferred from the claim text.