Electrical medium or high voltage switching device

摘要

An electrical switching device for medium or high voltage circuits having at least a nominal contact arrangement, wherein the nominal contact arrangement includes at least a first nominal contact including a plurality of contact fingers forming a finger cage concentric with respect to a longitudinal axis, wherein the contact fingers are separated from one another by empty slots extending up to a free end of the contact fingers. The empty slots include first and second empty slots, wherein the second empty slots are shorter than the first empty slots, and wherein the contact fingers are grouped in groups, with the contact fingers of each group being separated by second empty slots and the contact fingers of adjacent groups being separated by first empty slots.

主权项

1. An electrical switching device for medium or high voltage circuits comprising:
a chamber enclosed by an enclosure which is cylindrical around a longitudinal axis, at least one nominal contact arrangement, wherein the nominal contact arrangement comprises:
at least one first nominal contact comprising a plurality of contact fingers forming a finger cage concentric with respect to the longitudinal axis, wherein the contact fingers are separated from one another by empty slots extending up to a free end of the contact fingers, andat least one mating second nominal contact, the at least one second nominal contact is tube-shaped, wherein at least one of the nominal contacts is movable parallel to the longitudinal axis and cooperates with the other nominal contact for closing and opening the electric switching device, the empty slots having first and second empty slots, wherein the second empty slots are shorter than the first empty slots, and wherein the contact fingers are grouped in groups, with the contact fingers of each group being separated by the second empty slots and the contact fingers of adjacent groups being separated by the first empty slots; wherein each group comprises at least two contact fingers, and wherein the contact fingers are formed by a tubular metal section, wherein the first empty slots and the second empty slots extend from a first end into the tubular metal section, and wherein the contact fingers are interconnected at a second end of the tubular metal section.