Disconnector switch

Abstract

The invention relates to the field of power engineering and electrical engineering, and more particularly to disconnector switches designed for switching electric circuits. The technical result of the claimed technical solution consists in: increasing the area of contact between a movable contact and a fixed contact, thus reducing the heating of a disconnector switch; improving the reliability of a disconnector switch; and simplifying the structure thereof. This technical result is achieved by means of a disconnector switch consisting of a housing having mounted therein a first fixed contact, a second fixed contact, and a movable contact that creates an electrical connection between the first fixed contact and the second fixed contact, wherein the movable contact is connected to a transverse shaft by means of brackets mounted on shafts of the movable contact such as to allow the movable contact to rotate in relation of the axis of rotation of the transverse shaft.

Description

[0001] Switch-disconnector Field of technology

[0002] The invention relates to the field of electric power engineering and electrical engineering, in particular to switch-disconnectors, which are intended for switching electrical circuits.

[0003] State of the art

[0004] The prior art discloses a switching device that includes a housing, a first fixed contact, a second fixed, movable contact, rotated by a crossbar shaft (see US20070145016A1 MIK H01H77 / 10).

[0005] The disadvantage of this technical device (technical problem) is the impossibility of using this arrangement for switch-disconnectors with high rated current values ​​(more than 1600 A) due to the high material consumption and low efficiency of the design.

[0006] Also known from the prior art is a device for switching electric current (RU 2584241 C1, published 20.05.2016), the design of which allows solving the above-mentioned drawback. The device comprises a first fixed contact, a second fixed contact and a movable contact for implementing an electrical connection between the first and second fixed contacts, wherein the movable contact is pivotally connected to the first fixed contact by means of a hinge joint to allow the movable contact to rotate relative to the first fixed contact around the axis of rotation.

[0007] The disadvantage of this technical device (technical problem) is the presence of a hinged joint, which reduces the contact area of ​​the moving and fixed contacts, which can lead to overheating and premature failure of the switch-disconnector, as well as the complication of the design of the switch-disconnector, the complication of the assembly process due to the presence of a hinged joint in it.

[0008] Disclosure of the essence of the invention

[0009] The objective of the claimed technical solution is to create a switch-disconnector arrangement with a simplified design, in which there is no hinged connection, which makes it possible to increase the contact area of ​​the moving and fixed contacts.

[0010] The technical result of the claimed technical solution consists in increasing the contact area of ​​the moving and fixed contacts, thereby reducing the heating of the switch-disconnector, increasing the reliability of the switch-disconnector, and simplifying the design of the switch-disconnector.

[0011] The technical result is achieved by implementing a switch-disconnector consisting of a housing inside which a first fixed contact, a second fixed contact and a movable contact are installed, which makes an electrical connection between the first fixed contact and the second fixed contact, wherein the movable contact is connected to the cross-arm shaft using brackets installed on the axes of the movable contact, so that it allows the movable contact to rotate together with the cross-arm shaft relative to the axis of rotation of the cross-arm shaft.

[0012] Brief description of the drawings

[0013] The essence of the invention is explained by the figures: Fig. 1 - arrangement of the switch-disconnector; Fig. 2 - principle of connection of the crossarm shaft and the moving contact, isometric view; Fig. 3 - moving contact and crossarm shaft connected together, isometric view (view 1); Fig. 4 - moving contact and crossarm shaft connected together, isometric view (view 2); Fig. 5 - interaction of the moving contact with fixed contacts (crossarm shaft is not shown), where:

[0014] 1 - first fixed contact

[0015] 2 - second fixed contact

[0016] 3 - movable contact

[0017] 4 - cross-beam shaft

[0018] 5 - brackets

[0019] 6 - axes of the moving contact

[0020] 7 - axis of rotation of the cross-beam shaft

[0021] 8 - body

[0022] Implementation of the invention

[0023] According to the invention, what is new is that the movable contact is connected to the shaft by a cross-arm using brackets installed on opposite ends of the axes of the movable contact and secured to the shaft-cross-arm, wherein said axes of the movable contact are not aligned with the axis of rotation of the shaft-cross-arm, which provides the possibility of rotation of the movable contact relative to the axis of rotation of the shaft-cross-arm, as well as the absence of a hinge pin used for the hinged connection of the movable contact and the fixed contact, which makes it possible to increase the contact spot between the legs of the movable contact and the fixed contact, to reduce the temperature of the contact spot, thereby increasing the reliability of the switch-disconnector.

[0024] The specified technical result is achieved as follows: 1) The movable contact 3 is connected to the cross-arm shaft 4 using brackets 5 mounted on the axes 6 of the movable contact 3, so that it allows the movable contact 3 to rotate together with the cross-arm shaft 4 relative to the rotation axis 7 of the cross-arm shaft 4;

[0025] 2) The moving contact 3 is not connected to the fixed contact 1 by means of a hinged connection.

[0026] The claimed technical solution works as follows:

[0027] The switch-disconnector consists of a first fixed contact 1, a second fixed contact 2 installed in a housing 8 and a movable contact 3 which carries out an electrical connection between the first fixed contact 1 and the second 2 fixed contact. The movable contact 3 is connected to the cross-arm shaft 4 by means of brackets 5 installed on the axes 6 of the movable contact 3, so that it allows the movable contact 3 to rotate together with the cross-arm shaft 4 relative to the rotation axis 7 of the cross-arm shaft 4. The brackets 5 are made in such a way that its longitudinal part is attached to the movable contact 3, and its side shelf is attached to the cross-arm shaft 4 by means of screws. In the open position of the disconnector switch, the moving contact 3 is disconnected from the second fixed contact 2, the electrical circuit is not closed, and in the closed position of the switch, the moving contact 3 is in contact with the fixed contact 2, the electrical circuit is closed.

[0028] Thus, when implementing the claimed switch-disconnector, a technical result is achieved consisting in increasing the contact area of ​​the moving and fixed contacts, thereby reducing the heating of the switch-disconnector, increasing the reliability of the switch-disconnector, and simplifying the design of the switch-disconnector.

Claims

Invention formula A switch-disconnector consisting of a housing, inside which a first fixed contact, a second fixed contact and a moving contact are installed, which makes an electrical connection between the first fixed contact and the second fixed contact, characterized in that the moving contact is connected to the shaft-crossarm by means of brackets, which are fixed with their longitudinal part to the moving contact, and with their lateral shelves fixed to the shaft-crossarm, wherein the brackets are installed with the possibility of rotation of the moving contact together with the shaft-crossarm relative to the axis of rotation of the shaft-crossarm

Images