CN215644154U

CN215644154U - Arcing contact arrangement for a switching device and switching device

Info

Publication number: CN215644154U
Application number: CN202122105533.4U
Authority: CN
Inventors: 陈桂高
Original assignee: Schneider Electric Industries SAS
Current assignee: Schneider Electric Industries SAS
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-01-25
Anticipated expiration: 2031-09-02

Abstract

The utility model relates to an arc contact device for a switch device and the switch device, wherein the arc contact device comprises an arc-extinguishing grid support, an arc contact, a moving contact and a static contact, the arc contact is arranged on the arc-extinguishing grid support, the arc-extinguishing grid support and the static contact have the same potential, and the arc contact is configured to transfer an electric arc generated between the inner side of the moving contact facing the static contact and the static contact to the outer side of the moving contact far away from the static contact and between the arc contact and the arc contact in the switching-off process of the switch device.

Description

Arcing contact arrangement for a switching device and switching device

Technical Field

The utility model relates to an arcing contact arrangement for a switchgear and to a switchgear comprising such an arcing contact arrangement.

Background

In a switching device, when a moving contact and a stationary contact are separated from each other, an arc is generated between the moving contact and the stationary contact. Such arcs have a great damaging effect on the contacts, and particularly the conductive contact area can be seriously ablated, so that the opening torque of the switching equipment is increased, and finally the opening cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model provides an arc contact device for a switch device, which comprises an arc-extinguishing grid support, an arc contact, a moving contact and a fixed contact, wherein the arc contact is arranged on the arc-extinguishing grid support, the arc-extinguishing grid support and the fixed contact have the same potential, and the arc contact is constructed in a way that in the switching-off process of the switch device, an arc generated between the inner side of the moving contact facing the fixed contact and the fixed contact is transferred to the position between the outer side of the moving contact far away from the fixed contact and the arc contact.

Advantageously, when the moving contact is in contact with the stationary contact, the arcing contact is in contact with the outer side of the moving contact, forming a branch of current transfer, while the inner side of the moving contact is in contact with the stationary contact, forming the main channel of current transfer.

Advantageously, when the moving contact rotates by a first predetermined angle to be separated from the fixed contact, the arcing contact is kept in contact with the outer side of the moving contact, so that the current is completely transferred between the outer side of the moving contact and the arcing contact.

Advantageously, when the movable contact continues to rotate by the second predetermined angle, the outer side of the movable contact separates from the arcing contact, an electric arc being generated between the outer side of the movable contact and the arcing contact.

Advantageously, the stationary contact has an electrically conductive contact region and an electrically non-conductive contact region.

Advantageously, the movable contact also has a corresponding conductive contact zone and a non-conductive contact zone, and the outer side of the non-conductive contact zone is in contact with the arcing contact.

The utility model also provides a switchgear comprising an arcing contact arrangement as described above.

Drawings

Advantages and objects of the present invention will be better understood in the following detailed description of preferred embodiments of the utility model, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:

fig. 1 shows a schematic view of a switchgear according to the utility model, showing the movable contacts and the stationary contacts in contact with each other.

Fig. 2 shows a schematic view of a switchgear according to the present invention, showing the movable contact rotated by a first predetermined angle, separated from the stationary contact.

Fig. 3 shows a schematic view of a switching device according to the utility model, showing the movable contact rotated again by a second predetermined angle, away from the arcing contact.

Fig. 4 shows the conductive contact area and the non-conductive contact area of a stationary contact.

Fig. 5 shows the electrically conductive contact area and the electrically non-conductive contact area of the movable contact.

Detailed Description

Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The term "sequentially comprising A, B, C, etc" merely indicates the order of the included elements A, B, C, etc. and does not exclude the possibility of including other elements between a and B and/or between B and C.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to fig. 1 to 5.

The arc contact device 1 comprises an arc-extinguishing grid support 14, an arc contact 11, a moving contact 12 and a fixed contact 13, wherein the arc contact 11 is installed on the arc-extinguishing grid support 14, the arc-extinguishing grid support 14 and the fixed contact 13 are at the same potential, and the arc contact is configured to transfer an arc generated between the inner side of the moving contact facing the fixed contact and the fixed contact to the outer side of the moving contact far away from the fixed contact and the arc contact in the switching-off process of the switch equipment.

Fig. 1 shows the arrangement when the moving and stationary contacts are in contact with each other. The arc contact 11 contacts with the outer side of the moving contact 12 far away from the fixed contact, and the inner side of the moving contact 12 facing the fixed contact contacts with the fixed contact 13.

When the moving contact rotates by a first predetermined angle (for example, 10 degrees) and is separated from the fixed contact, as shown in fig. 2, the arcing contact still keeps in contact with the moving contact, so that the current is completely transferred between the moving contact and the arcing contact, and no electric arc is generated between the moving contact and the fixed contact because no potential difference exists between the moving contact and the fixed contact at this time.

When the movable contact continues to rotate by a second predetermined angle (e.g., 3 degrees), the outer side of the movable contact separates from the arcing contact, as shown in fig. 3, such that an arc is generated between the outer side of the movable contact and the arcing contact.

As shown in fig. 4, the stationary contact 13 has a conductive contact area 131 and a non-conductive contact area 132. For example, the stationary contact 13 is provided with notches to divide the stationary contact into a conductive contact area and a non-conductive contact area, but it should be understood that notches are merely examples and that there may be other ways to divide the stationary contact into a conductive contact area and a non-conductive contact area. The movable contact also has a conductive contact zone 121 and a non-conductive contact zone 122, corresponding to the conductive contact zone and to the non-conductive contact zone of the stationary contact, the outer side of the non-conductive contact zone 122 being in contact with the arcing contact.

As described above, by providing the arc contact, the generation of an arc between the moving contact and the stationary contact is prevented, and the generation of an arc between the outer side of the moving contact and the arc contact is prevented, so that the conductive contact area of the moving contact and the stationary contact is protected, and the stability of the mechanical characteristics, the temperature rise and other performances of the switch device is improved.

The above description is merely illustrative of the present invention, which is set forth to enable one of ordinary skill in the art to fully practice the present invention, and not to limit the present invention. The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the utility model, so as to achieve the aim of the utility model.

Claims

1. The arc contact device is characterized by comprising an arc-extinguishing grid support, an arc contact, a moving contact and a fixed contact, wherein the arc contact is installed on the arc-extinguishing grid support, the arc-extinguishing grid support and the fixed contact are at the same potential, and the arc contact is configured to transfer electric arcs generated between the inner side of the moving contact, facing the fixed contact, and the fixed contact to the outer side of the moving contact, far away from the fixed contact, and the arc contact in the switching-off process of the switching equipment.

2. An arcing contact arrangement as recited in claim 1, wherein when the movable contact contacts the stationary contact, the arcing contact contacts an outer side of the movable contact forming a branch path for current transfer, and an inner side of the movable contact contacts the stationary contact forming a main path for current transfer.

3. An arcing contact arrangement as set forth in claim 2, wherein when the movable contact is rotated a first predetermined angle away from the stationary contact, the arcing contact remains in contact with the outer side of the movable contact, causing the current to be transferred entirely between the outer side of the movable contact and the arcing contact, and no arcing occurs when the movable contact and the stationary contact are separated because there is no potential difference between the movable contact and the stationary contact at that time.

4. An arcing contact arrangement as recited in claim 3, wherein as the movable contact continues to rotate through the second predetermined angle, the outer side of the movable contact separates from the arcing contact, an arc being generated between the outer side of the movable contact and the arcing contact.

5. The arcing contact apparatus of claim 1, wherein said stationary contact has a conductive contact region and a non-conductive contact region.

6. An arcing contact arrangement as recited in claim 5, wherein said movable contact also has corresponding conductive contact zones and non-conductive contact zones, and wherein an outer side of the non-conductive contact zone is in contact with said arcing contact.

7. A switchgear characterized in that it comprises an arcing contact arrangement as claimed in any one of claims 1-6.