Restoring element, and electrical switch having such a restoring element

Patent metadata

Field	Value
Publication number	US-2021193424-A1
Application number	US-202017124615-A
Country	US
Kind code	A1
Filing date	Dec 17, 2020
Priority date	Dec 20, 2019
Publication date	Jun 24, 2021
Grant date	—

Abstract

A restoring element is for an electrical switch. In an embodiment, the restoring element is constructed in two parts from a first part and a second part. The two parts are configured to converge in a first direction for tripping the electrical switch and the two parts do not necessarily converge in a second direction for resetting the electrical switch, the second direction being different from the first direction. Further, the second part of the restoring element includes a restoring cam which is configured to interact with a handle of a switching mechanism of the electrical switch, such that, during resetting of the electrical switch, the restoring element is configured to be rotated by the handle in the second direction for resetting the electrical switch.

First claim

What is claimed is:

1 . A restoring element for an electrical switch, comprising:
a first part; and a second part, the first part and the second part converging in a first direction for tripping the electrical switch and the first part and the second part not necessarily converging in a second direction for resetting the electrical switch, the second direction being different from the first direction, the second part of the restoring element including
a restoring cam, configured to interact with a handle of a switching mechanism of the electrical switch, such that, during resetting of the electrical switch, the restoring element is configured to be rotated by the handle in the second direction for resetting the electrical switch.

2 . The restoring element of claim 1 , wherein the first part and the second part each respectively include a function cam.

3 . The restoring element of claim 2 , wherein the function cams of the first part and the second part are configured to interact with respective position stops, springs, auxiliary tripping devices, pressure tripping devices or a latching magnet.

4 . The restoring element of claim 1 , wherein the restoring element is designed as a rotatable shaft, wherein the first part and the second part are configured to converge in a first rotation direction for tripping the electrical switch and wherein the first part and the second part are configured to not necessarily converge in a second rotation direction for resetting the electrical switch, the second rotation direction being opposite to the first rotation direction.

5 . An electrical switch comprising:
a switching mechanism, including
at least one handle; and
one restoring element including a cam;
the pressure tripping device of claim 1 ; and a plurality of poles, each of the plurality of poles of the electrical switch include at least two switching contacts for closing or interrupting a current path, the at least two switching contacts of each of the plurality of poles of the electrical switch being separated via an operating element of the pressure tripping device, configured to respond to a pressure generated by an electric arc struck in an event of electrodynamic repulsion of the switching contacts, in a separation zone of the at least two switching contacts of each of the plurality of poles of the electrical switch, wherein the operating element is movable from an inoperative position to an operating position, in which the cam for the pressure tripping device of the restoring element is operated in the first direction and, as a result the two parts of the restoring element, is configured to converge and trip the electrical switch, and wherein, upon the electrical switch being reset, the restoring cam is configured to be operated by the at least one handle in the second direction of the restoring element and, as a result, the operating element is configured to be restored by the cam for the pressure tripping device to the inoperative position.

6 . The electrical switch of claim 5 , wherein further cams, configured to additionally trip the electrical switch, are provided on the first part of the restoring element.

7 . The electrical switch of claim 5 , wherein the operating element of the pressure tripping device is designed as a tappet.

8 . The electrical switch of claim 7 , wherein the tappet is held in an inoperative position by a spring and configured to be operated against the spring force of the spring, under pressure.

9 . The electrical switch of claim 5 , wherein the electrical switch comprises one, two or three electrical poles and wherein the pressure tripping device comprises three or four flow channels.

10 . The restoring element of claim 2 , wherein the restoring element is designed as a rotatable shaft, wherein the first part and the second part are configured to converge in a first rotation direction for tripping the electrical switch and wherein the first part and the second part are configured to not necessarily converge in a second rotation direction for resetting the electrical switch, the second rotation direction being opposite to the first rotation direction.

11 . The restoring element of claim 3 , wherein the restoring element is designed as a rotatable shaft, wherein the first part and the second part are configured to converge in a first rotation direction for tripping the electrical switch and wherein the first part and the second part are configured to not necessarily converge in a second rotation direction for resetting the electrical switch, the second rotation direction being opposite to the first rotation direction.

12 . The electrical switch of claim 6 , wherein the operating element of the pressure tripping device is designed as a tappet.

13 . The electrical switch of claim 12 , wherein the tappet is held in an inoperative position by a spring and configured to be operated against the spring force of the spring, under pressure.

Assignees

• Siemens Ag

Inventors

• Biedunkiewicz Pawel
• Dahl Joerg-Uwe
• Faltermeier Markus

Classifications

• H01H71/12

  Automatic release mechanisms with or without manual release · CPC title

• H01H71/1081

  Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker (circuits H02H3/06, H02H7/26) · CPC title

• H01H2077/025

  with pneumatic means, e.g. by arc pressure · CPC title

• H01H71/52 Primary

  actuated by lever · CPC title

• H01H2071/2427

  with blow-off movement tripping mechanism, e.g. electrodynamic effect on contacts trips the traditional trip device before it can unlatch the spring mechanism by itself · CPC title