US 9,543,087 B2Granted

Contact system

AssigneeABB Schweiz AG

InventorsFrancesco Pisu, Jadran Kostovic, Sami Kotilainen, Timothy Sutherland

Life of this patent

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Abstract

An electrical switching device including at least a nominal contact arrangement, the nominal contact arrangement at least a first nominal contact with a plurality of nominal contact fingers forming a finger cage concentric with respect to a longitudinal axis (z), and at least a mating second nominal contact. An arcing contact arrangement including a first arcing contact and a mating second arcing contact. An arcing contact finger including at its free end a first impact area in which a first contacting to the second arcing contact occurs when closing, the electrical switching device. The first impact area is formed by a first planar surface arranged at an inclination angle (α) larger than zero degrees with respect to the longitudinal axis (z).

Claims20

Dependent claims

An electrical switching device having a longitudinal axis (z), the electrical switching device comprising:

at least one contact arrangement, the contact arrangement including a first contact and a mating second contact, the first contact including at least one contact finger;
wherein the contact finger is configured to be elastically deformed in a radial direction upon closing the electrical switching device;
wherein for closing and opening the electrical switching device at least one of the first contact and the mating second contact is movable parallel to the longitudinal axis (z) and cooperates with the other contact;
wherein the contact finger includes, at its free end, a first impact area in which a first contacting to the mating second contact occurs when closing the electrical switching device;
and
wherein the first impact area is formed by a first planar surface which is arranged at an inclination angle (α) larger than zero degrees with respect to the longitudinal axis (z), wherein the first planar surface is a flat area.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/711,254Filed 13 May 2015 · continuation
Priority: EP 1219246813 Nov 2012
Published: US 2015/0248976 A13 Sep 2015
Granted: 10 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01H 9/386
Auxiliary contacts on to which the arc is transferred from the main contacts: arcing contact pivots relative to the fixed contact assembly
H01H 1/38
By sliding: plug-and-socket contacts
H01H 1/44
By sliding: with resilient mounting
H01H 1/46
By sliding: self-aligning contacts