CN102484014B - Disconnectors for switchgear - Google Patents

Abstract

The object of the present invention is to create a disconnector (1) for a switchgear, which can realize a switchgear (1) with a compact structure and space-saving. For this purpose, a disconnector (1) is proposed, comprising a disconnector fixed contact (2), a disconnector movable contact (3) and a disconnector drive shaft (9), wherein the disconnector drive shaft is mechanically connected to the disconnector movable contact (3) by means of an insulating connecting rod (8), wherein the disconnector fixed contact (2), the disconnector movable contact (3) and the disconnector drive shaft (9) are arranged in a straight line, and the disconnector drive shaft (9) and the connecting rod (8) are designed for rotation through 180°.

Description

Disconnectors for switchgear

technical field

The invention relates to a disconnector for switchgear.

Background technique

It is known from the well-known prior art that, in switchgear comprising a circuit breaker, a disconnector is provided on the insert and is equipped with releasable contacts so that when the insert is moved from the contact position to the disengagement position, the The disengaged contacts form a break and thus form the disconnector.

A disconnector is known from DE102007038898B3, wherein the disconnector fixed contact in the form of a pin and the disconnector moving contact in the form of a moving sleeve are provided for making or forming a break, wherein the sleeve is connected to the driver and is designed as movable.

Contents of the invention

The technical problem to be solved by the invention is to provide a switch disconnector for a switchgear which enables a compact and space-saving switchgear.

According to the present invention, the above-mentioned technical problems are solved by a disconnector, which includes a disconnector fixed contact, a disconnector movable contact and a disconnector drive shaft, and the disconnector drive shaft is connected with the disconnector movable contact by means of an insulated connecting rod. Mechanical connection of the first head, in which the fixed contact of the disconnector, the moving contact of the disconnector and the drive shaft of the disconnector are arranged in a straight line, and the drive shaft of the disconnector and the connecting rod are designed to rotate 180°.

This switch disconnector has a space-saving and compact design, since all important components are arranged in line with one another, or in other words in a straight line, so that the lateral dimensions of the switch disconnector require only a minimum of space. The design of the drive shaft of the disconnector and the connecting rod for a 180° rotation has outstanding advantages, because the switched-on position of the disconnector when the fixed contact of the disconnector is electrically connected to the movable contact of the disconnector is therefore in the same position as the drive shaft rotated by 180°. Between the isolating switch fixed contact and the isolating switch moving contact forming a fracture between the disconnecting position of the isolating switch, the on position of the isolating switch and the off position of the isolating switch are respectively the so-called dead points of the driving movement, so that the driver Automatic blocking in the end position of the on position of the disconnector and the end position of the off position of the disconnector, and thus the additional costly and laborious work for locking the disconnector in its on position or in its off position can be dispensed with Locking mechanism that takes up space.

According to an advantageous refinement of the invention, the connecting rod has an insulating section and a segment. A space-saving design can be achieved by means of such a segment of the connecting rod, since in the disconnected position this segment of the connecting rod is positioned around the drive shaft. The insulating section of the connecting rod forms a dielectric separation of the disconnector from the contact system of the drive shaft.

According to a further embodiment of the invention, the disconnector movable contact is designed as a disconnector pin which is guided in a conductive guide sleeve. Such a disconnector pin is a particularly simple-shaped isolating switch moving contact, where on the one hand a mechanical guidance can be implemented by means of a conductive guide sleeve, and on the other hand an electrically conductive connection of the disconnector pin to other current-carrying parts is possible.

According to a preferred embodiment of the invention, the disconnector fixed contact is designed as a sleeve for receiving the disconnector pin when the disconnector is in the closed position.

According to a particularly preferred embodiment of the invention, the guide sleeve is electrically conductively connected to a connecting piece which is intended to be connected to an earthing switch contact and/or a contact of a circuit breaker or a load switch.

Description of drawings

The present invention will be described in detail below by means of embodiments with reference to the accompanying drawings. in:

Fig. 1 shows the cross-sectional view of isolating switch according to the present invention; And

FIG. 2 shows a perspective view of an embodiment of a disconnector according to the invention.

Detailed ways

FIG. 1 shows an embodiment of a disconnector 1 in the ON position. The disconnector 1 includes a disconnector fixed contact 2 in the form of a sleeve and a disconnector movable contact 3 , which is designed as a disconnector pin that mechanically guides movement in a guide sleeve 4 . The guide sleeve 4 is electrically conductively connected to a connecting piece 5 in the form of a flexible conductive strip, which is provided for connecting or electrically conductively connecting the disconnector 1 to other switching devices, for example earthing switches and/or circuit breakers or load switches. To this end, the connection part 5 has one or more flexible sections 6 and 7 which can move a contact of the circuit breaker (not shown in the figure).

In addition, the isolating switch moving contact 3 is mechanically connected to the isolating switch drive shaft 9 through an insulating connecting rod, wherein the insulating connecting rod 8 is connected to the isolating switch moving contact 3 or the isolating switch driving shaft 9 at its upper end 10 and at its lower end 11 respectively. The arm 12 of the isolator is hinged, so when the drive shaft 9 of the disconnector rotates, the movable contact 3 of the disconnector can be guided in the guide sleeve 4 along a straight line through the rotational hinged connection between the insulating link 8 and the movable contact 3 of the disconnector Movement for switching from the ON position of the isolating switch 1 shown in FIG. 1 to the OFF position, see FIG. 2 for details. The insulating connecting rod 8 has an insulating section 13, which ensures a dielectric separation between the energized disconnector 1 and the disconnector drive shaft 9, and a segment 14, as will be explained in more detail below with reference to FIG. 2, In order to form a break between the fixed contact 2 of the disconnector and the movable contact 3 of the disconnector, it is positioned around the drive shaft 9 of the disconnector after the disconnection process has been carried out.

Fig. 2 shows a perspective view of the disconnector 1 of Fig. 1, which is a three-phase design, comprising phases L1, L2 and L3, said three phases having the same components and only one of them being shown and described in the sectional view of Fig. 1 One phase L1, and see FIG. 2 likewise only shows and explains this phase L1. In FIG. 2 the disconnector 1 is in its off position, that is to say that a rotary motion is introduced into the disconnector drive shaft 9 by a driver not shown in the figure, so that the disconnector drive shaft 9 is rotated by 180° so that the segment 14 It is in a position around the isolating switch drive shaft 9, and through the 180° rotation of the isolating switch drive shaft 9, the isolating switch moving contact 3, which is in the form of a isolating switch pin, is in its disconnected position, so that the isolating switch pin and the isolating A fracture d is formed between the fixed contacts 2 of the switch, which is used for the dielectric separation of the fixed contacts 2 of the isolating switch and the moving contacts 3 of the isolating switch. Fig. 2 does not show the bus terminal of the switching device connected to the fixed contact 2 of the isolating switch (also not shown in the figure), nor does it show other switching devices that can be connected to the connecting piece 5 in the form of a conductive strip, such as Earthing switches and/or circuit breakers or load switches, which can be connected to the cable terminals of the switchgear. In this case, the isolating switch is intended to dielectrically separate the bus terminal not shown in the figure from other components of the switchgear which are energized or supplied with voltage.

Through the rotation of the disconnector drive shaft 9 by 180°, the on position of the disconnector 1 shown in Figure 1 and the disconnected position of the disconnector 1 shown in Figure 2 form the so-called dead point of the drive movement, so that the movement is automatically blocked at These end positions require no additional expensive latching or containment mechanisms.

list of reference signs

1 isolation switch

2 Fixed contacts of isolating switch

3 moving contacts of isolating switch

4 guide sleeve

5 connectors

6.7 Flexible section

8 insulating connecting rod

9 Isolation switch drive shaft

10 upper end

11 lower end

12 arm

13 insulation section

14 arc segment

D Fracture

L1, L2, L3 phase

Claims (4)

1. the isolating switch for switchgear (1), comprise isolating switch fixed contact (2), isolating switch moving contact (3) and isolating switch driving shaft (9), described isolating switch driving shaft is mechanically connected with isolating switch moving contact (3) by the connecting rod (8) of insulation, isolating switch driving shaft (9) and connecting rod (8) are designed for isolating switch driving shaft and rotate 180 °, it is characterized by, isolating switch fixed contact (2), isolating switch moving contact (3) and isolating switch driving shaft (9) are in line arrangement, insulated connecting rod (8) is (10) and isolating switch moving contact (3) rotary hinge grounding connection and horn (12) the rotary hinge grounding connection in its lower end (11) with isolating switch driving shaft (9) at its upper end, described connecting rod (8) has an insulating segment (13) and a bow-shaped section (14).

2. according to isolating switch according to claim 1 (1), it is characterized by, isolating switch moving contact (3) is designed to the isolating switch pin of guiding movement in conduction guide pin bushing (4).

3. according to the isolating switch (1) described in claim 1 or 2, it is characterized by, isolating switch fixed contact (2) is designed to the sleeve laying isolating switch pin when isolating switch (1) is in the close position.

4. according to isolating switch according to claim 3 (1), it is characterized by, conduction guide pin bushing (4) is conducted electricity with connector (5) and is connected, and this connector (5) is given for and is connected with the contact of earthed switch contact and/or circuit breaker or load switch.