CN215377239U

CN215377239U - Contact for a medium-voltage or high-voltage circuit breaker and medium-voltage or high-voltage circuit breaker

Info

Publication number: CN215377239U
Application number: CN202023300064.3U
Authority: CN
Inventors: E·弗兰金; 傅军; 方明; 魏莉
Original assignee: Schneider Electric Industries SAS
Current assignee: Schneider Electric Industries SAS
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-12-31
Anticipated expiration: 2030-12-31

Abstract

The utility model provides a contact for a medium-voltage or high-voltage circuit-breaking device and a medium-voltage or high-voltage circuit-breaking device, the contact having a first surface and a second surface opposite to the first surface, a graphite silver coating being provided on the first surface and/or the second surface at the end of the contact.

Description

Contact for a medium-voltage or high-voltage circuit breaker and medium-voltage or high-voltage circuit breaker

Technical Field

The utility model relates to a contact for a medium-voltage or high-voltage circuit breaker and a medium-voltage or high-voltage circuit breaker.

Background

The contact part of the movable contact and the fixed contact of the existing medium-voltage or high-voltage circuit breaker is impacted when the contacts are closed, and the probability of fusing of the contacts is high, so that the service life of the contacts is shortened.

Generally, the common silver plating or hard silver plating design is adopted, the electric contact material can provide good electric conductivity and thermal conductivity and low and stable contact resistance, but has the defects of large abrasion loss, poor welding resistance, poor corrosion resistance and the like, and finally causes the heat generation failure of medium-voltage or high-voltage circuit breaking equipment. Therefore, there is a need for a contact that can withstand impact while reducing the likelihood of fusing for medium or high voltage circuit interrupting devices.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a contact that is resistant to impact while reducing the likelihood of blow-out.

The utility model provides a contact for medium or high voltage circuit breaking equipment, which has a first surface and a second surface opposite to the first surface, and a graphite silver coating is arranged on the first surface and/or the second surface at the end part of the contact.

Advantageously, the graphitic silver coating is applied directly on the first surface and/or the second surface.

Advantageously, the contacts have a graphite silver coating at the portions of the ends that contact each other.

Advantageously, said contacts are moving contacts or stationary contacts.

Advantageously, the thickness of the graphitic silver layer is in the range of 5 to 20 microns.

Advantageously, the utility model also provides a medium or high voltage circuit breaking device comprising a contact as described above.

The graphite silver layer is arranged at the contact part of the contacts, so that the impact when the contacts are closed can be reduced, the possibility of fusing of the contacts is reduced, the service life of the contacts is prolonged, and the safety of medium-voltage or high-voltage circuit breaking equipment is improved.

Drawings

Advantages and objects of the present invention will be better understood from 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:

figure 1 shows a perspective view of a contact according to the utility model.

Figure 2 illustrates a front view of the contact shown in figure 1.

Figure 3 illustrates a side view of the contact shown in figure 1.

Fig. 4 shows a perspective view of two contacts in contact with each other.

Fig. 5 shows a front view of two contacts in contact with each other.

Fig. 6 shows a side view of two contacts in contact with each other.

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.

In the following, the contacts of the medium or high voltage breaking device, which may be a circuit breaker, an earthing switch, a fuse switch or a disconnector, of the utility model are described with reference to fig. 1 to 5.

Fig. 1-3 show the contacts individually. The contact 1 has a first surface 11 and a second surface 12 opposite the first surface. The contact can be a moving contact or a static contact. A coating of graphite silver (AgC) is provided on the first surface 11 and/or the second surface 12 at the end of the contact. As shown in fig. 3, a graphite silver coating may be provided on one or more of the

portions

13, 14, 15 and 16 of the contacts so that when two contacts are in contact with each other, the portions in contact with each other are each provided with a graphite silver coating. Preferably, the graphitic silver coating is applied directly on the first surface and/or the second surface, which means that the graphitic silver is not applied via any other intermediate layer on the first surface and/or the second surface, but is directly in contact with the first surface and/or the second surface for coating. In order to directly coat (for example, electroplate) graphite silver on the contact, the utility model discloses utilize special frock hoist, realize that graphite silver cladding material's is even stable and strong with contact body cohesion, and need not to use the combined type graphite silver electroplating of noble metal as the primer layer.

Fig. 4 to 6 show schematic views of two contacts being in contact, for example, the upper contact being a stationary contact and the lower contact being a movable contact. As can be seen from the drawings, it is only necessary to apply the graphite silver coating to the portion where the movable contact and the stationary contact are in contact with each other. Typically, the thickness of the graphitic silver layer is in the range of 5 to 20 microns.

It is to be understood that regardless of the form of the contacts, it is sufficient if a graphite silver coating can be applied to the portions where the contacts contact each other. The contact disclosed by the disclosure is used for medium-voltage or high-voltage circuit breaking equipment.

Moreover, 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 purpose of the utility model.

Claims

1. A contact for medium or high voltage circuit breaking devices, characterized in that the contact has a first surface and a second surface opposite the first surface, with a coating of graphitic silver on the first surface and/or the second surface at the end of the contact.

2. The contact of claim 1, wherein the graphitic silver coating is applied directly to the first surface and/or the second surface.

3. The contact of claim 1, wherein the contact has a graphite silver coating on portions of the ends that contact each other.

4. The contact of claim 1, wherein the contact is a movable contact or a stationary contact.

5. The contact of claim 1, wherein the graphitic silver coating has a thickness in the range of 5 to 20 microns.

6. A medium voltage circuit-breaking device, characterized in that it comprises a contact according to any one of claims 1 to 5.

7. A high-voltage circuit-breaking device, characterized in that it comprises a contact according to any one of claims 1 to 5.