CN202142430U - Switch device static contact - Google Patents
Switch device static contact Download PDFInfo
- Publication number
- CN202142430U CN202142430U CN201120187401U CN201120187401U CN202142430U CN 202142430 U CN202142430 U CN 202142430U CN 201120187401 U CN201120187401 U CN 201120187401U CN 201120187401 U CN201120187401 U CN 201120187401U CN 202142430 U CN202142430 U CN 202142430U
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- contact
- curved surface
- static
- static contact
- arc
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Abstract
The present utility model discloses a switch device static contact. The static contact comprises a wiring end connected with a load and a contact end connected with a movable contact, and the contact end is provided with an abutting surface and a transitional surface when the movable contact and the static contact are closed. The static contact is characterized in that the transitional surface is a curved surface, the curved surface is tangential with the abutting surface, the curved surface is an arc surface, an involute surface or an Archimedes surface. Compared with the prior art, the transitional surface of the movable contact is designed as a curved surface, the separating phenomenon occurred during the process of closing the movable and static contacts is avoided, and the emerging of the arc is effectively inhibited. Thus, the service lives of the movable and static contacts can be protected, and the connection breaking capacity and the short circuit connection capacity can be effectively increased. Moreover, the advantages of the structure are more obvious when the short circuit is connected.
Description
Technical field
The utility model relates to a kind of fixed contact of switching device, and the plug-type contact system of particularly a kind of rotation belongs to the low voltage electrical apparatus technology field.
Background technology
The effect of automatic transfer switching electric appliance is to be used to monitor power circuit, and can be with one or several load circuit from a power source conversion to another power supply.Be typically provided with motor or electromagnet and contact system on it as power source.At present, various use occasions all require this kind device for switching will have higher connection and breaking capacity and short circuit withstand capacity.
Contact commonly used is divided into the finger type clapper-type contact that is usually used in low-voltage circuit breaker and is usually used in the cutter type plug-in type contact in the low pressure isolating switch on the existing automatic transfer switching electric appliance.Two kinds of contact forms respectively have pluses and minuses.Wherein, the node electric power of cutter type plug-in type contact is attractive, and it is moving, thermal stability is high; Therefore can reach higher tolerance index in short-term, but because common this kind contact adopts contactless design, therefore this contact can not arc resistingly burn when closure or open circuit; Electric arc rests on the insertion point calcination easily; Make contact burning, so just be difficult to reach the higher connection and the requirement of breaking capacity, the short circuit making capacity desired value that same also being difficult to reaches higher.
At present, for addressing the above problem, existing a kind of static contact structure form is as shown in Figure 1.This kind fixed contact has terminals 2 that are connected with load and the contact jaw 1 that is connected with moving contact; Fixed contact offers groove 3 on a side of moving contact; One end 31 of groove 3 extends to the direction of contact jaw 1, abutment face 12 when contact jaw 1 has the dynamic/static contact closure and the closed transition face 11 of dynamic/static contact.Fig. 2 is the sectional view of the fixed contact of this version, and the surface of transition face 11 is a tapered plane, and the intersection that has transition crest line or transition face 11 and abutment face 12 between transition face 11 and the abutment face 12 has a rounded surface.The fixed contact of this version can make electric arc arc root fast moving when the switch separating brake, effectively avoid the scaling loss of contact contact point, connects breaking capacity thereby can improve it.In dynamic and static contact making process, moving contact at first touches on the tapered plane 11, slides to abutment face 12, and finally rests on the abutment face 12.When transition tapered plane 11 slided, its velocity attitude was parallel to this tapered plane all the time at moving contact, and when moving contact arrived abutment face 12, its velocity attitude became and is horizontal direction.The sudden change of this velocity attitude can cause dynamic and static contact to carve at this moment and produce and separate, and meanwhile, just has electric arc between dynamic and static contact and produces, and arc energy is high, can be in a short period of time with the local liquefaction of arcing point.When dynamic and static contact contacted once more, both can stick together and can't move or sustained combustion in sliding process again, and these two kinds of results all can cause the damage of dynamic and static contact and can't reliably use again.Particularly when carrying out short circuit making, arc energy is higher, occurs above-mentioned unfavorable result more easily.So can't on connection and breaking capacity and short circuit making capacity, increase again.
Summary of the invention
The purpose of the utility model provides a kind of fixed contact of switching device, and the gap that can effectively dwindle even avoid dynamic and static contact in making process, to produce has suppressed the condition that electric arc produces, and can effectively improve and connect breaking capacity and short circuit making capacity.
For solving the problems of the technologies described above, the technical scheme of the utility model is:
A kind of fixed contact of switching device comprises terminals that are connected with load and the contact jaw that is connected with moving contact, abutment face and transition face when contact jaw has moving contact and fixed contact closure, and it is characterized in that: described transition face is a curved surface.
Described curved surface and abutment face are tangent.
Described curved surface is arc surface, involute face or archimedes line face.
Compared with prior art, the utility model is made as curved surface through the transition face with moving contact, has avoided the generation of dynamic and static contact in the making process segregation phenomenon, has promptly effectively suppressed the appearance of electric arc.Thereby protected the useful life of dynamic and static contact, can effectively improve and connect breaking capacity and short circuit making capacity.When carrying out short circuit making, the advantage of this structure is also just obvious in addition.
Description of drawings
Fig. 1 is the structural representation of existing fixed contact.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the structural representation of the utility model fixed contact.
Fig. 4 is the A-A cutaway view of Fig. 3.
Embodiment
Like Fig. 3; The fixed contact of a kind of switching device of the utility model; Comprise terminals 2 that are connected with load and the contact jaw 1 that is connected with moving contact; Fixed contact offers striking groove 3 on a side of moving contact, an end 31 of striking groove 3 extends to the direction of contact jaw 1, abutment face 12 when contact jaw 1 has the dynamic/static contact closure and the closed transition face 11 of dynamic/static contact.
Fig. 4 is the sectional view of the fixed contact of the utility model, and transition face 11 is a curved surface, and preferably, this curved surface and abutment face 12 are tangent.Curved surface can be arc surface, and curved surface also can be for having the curved surface of continually varying radius of curvature, like involute surface or archimedes line curved surface etc.
In dynamic and static contact making process, moving contact at first touches on the arc transition face 11, slides to abutment face 12, and finally rests on the abutment face 12.When arc transition face 11 slides, its velocity attitude will change along with the variation of dynamic/static contact contact point circular arc curvature at moving contact, and promptly its velocity attitude will be tangential on arc transition face 11 all the time.When moving contact arrived abutment face 12, its velocity attitude was a horizontal direction.Because of transition face 11 is a circular arc, preferably, transition face 11 is tangent with abutment face 12, so the velocity attitude on arc transition face 11 and the abutment face 12 is a smooth excessiveness.So guaranteed that also in whole making process, the velocity attitude of moving contact seamlessly transits all the time, do not had the phenomenon of sudden change to occur.
Claims (5)
1. the fixed contact of a switching device; Comprise terminals (2) that are connected with load and the contact jaw (1) that is connected with moving contact; Abutment face (12) and transition face (11) when contact jaw (1) has moving contact and fixed contact closure, it is characterized in that: described transition face (11) is a curved surface.
2. the fixed contact of switching device as claimed in claim 1, it is characterized in that: described curved surface and abutment face (12) are tangent.
3. according to claim 1 or claim 2 the fixed contact of switching device, it is characterized in that: described curved surface is for being arc surface.
4. according to claim 1 or claim 2 the fixed contact of switching device, it is characterized in that: described curved surface is the involute face.
5. according to claim 1 or claim 2 the fixed contact of switching device, it is characterized in that: described curved surface is the archimedes line face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120187401U CN202142430U (en) | 2011-06-07 | 2011-06-07 | Switch device static contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120187401U CN202142430U (en) | 2011-06-07 | 2011-06-07 | Switch device static contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202142430U true CN202142430U (en) | 2012-02-08 |
Family
ID=45553476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120187401U Expired - Lifetime CN202142430U (en) | 2011-06-07 | 2011-06-07 | Switch device static contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202142430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931875A (en) * | 2016-07-13 | 2016-09-07 | 武汉泰普变压器开关有限公司 | Fixed contact assembly of non-excitation drum-shaped tap changer |
-
2011
- 2011-06-07 CN CN201120187401U patent/CN202142430U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931875A (en) * | 2016-07-13 | 2016-09-07 | 武汉泰普变压器开关有限公司 | Fixed contact assembly of non-excitation drum-shaped tap changer |
| CN105931875B (en) * | 2016-07-13 | 2018-11-23 | 武汉泰普变压器开关有限公司 | A kind of static contact component of no excitation magnet drum-shape switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120208 |
|
| CX01 | Expiry of patent term |