Electrical switch
AssigneeABB Schweiz AG
InventorsRainer Kolmonen, Jari Elomaa, Patrik Rabb, Timo Jokiniemi
Life of this patent
Estimating the term…
Abstract
The electrical switch includes a first and a second fixed contact, and a movable knife contact including at least one longitudinal pair of blades being flexibly connected to each other, wherein the blades form, in a switching event, contact with contact portions of the first and/or the second fixed contact. Opposite surfaces of the contact portions of the first and the second fixed contact include a roughened area and the inner surface of each blade includes a protruded area or opposite surfaces of the contact portions of the first and the second fixed contact include a protruded area and the inner surface of each blade includes a roughened area.
Claims20
An electrical switch comprising:
- a first fixed contact,
- a second fixed contact,
- a movable knife contact comprising at least one longitudinal pair of blades, said blades being flexibly connected to each other, wherein the blades form, in a switching event, contact with contact portions of the first and/or the second fixed contact,
- opposite surfaces of the contact portions of the first and the second fixed contact, which in the switching event are seated between the blades, comprise a roughened area and an inner surface of each blade in the pair of blades comprises a from a surface protruding area, which in the switching event glide over the roughened area, or
- opposite surfaces of the contact portions of the first and the second fixed contact, which in the switching event are seated between the blades, comprise a from a surface protruding area and an inner surface of each blade in the pair of blades comprises a roughened area, which in the switching event glide over a protruding area.
Dependencies are inferred from the claim text.