CN209071254U - A kind of contact structure of breaker - Google Patents
A kind of contact structure of breaker Download PDFInfo
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- CN209071254U CN209071254U CN201920036176.0U CN201920036176U CN209071254U CN 209071254 U CN209071254 U CN 209071254U CN 201920036176 U CN201920036176 U CN 201920036176U CN 209071254 U CN209071254 U CN 209071254U
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- contact
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- stationary contact
- center
- breaker
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Abstract
A kind of contact structure of breaker, belongs to low voltage electrical apparatus technology field.Include: a dynamic guide rod, is fixed with movable contact thereon；One quiet guide rod, is fixed with stationary contact thereon；One is installed on the arc striking piece on quiet guide rod, feature: the generally rectangular shape of the stationary contact, which is removing outside a side far from arc striking piece, and the height of at least one side is higher than the height of stationary contact dot center in excess-three side.When movable contact and stationary contact are gradually disengaged, since the height of stationary contact point edge is higher than the height at center, therefore the electric field strength of stationary contact point edge is higher than the electric field strength at center, so that electric arc have leave contact center and fast transfer to contact edges trend, electric arc is avoided in the ablation of contact center, improve the electric life and interrupting performance of breaker, it is ensured that the reliability of breaker entirety.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, and in particular to a kind of contact structure of breaker.
Background technique
Critical elements of the low-voltage circuit breaker as low voltage electric network particularly, can when occurring Short-Circuit High Current in power grid
Rapid disjunction circuit, to guarantee that power grid is without damage.
When the dynamic/static contact of breaker will appear electric arc in opening procedure, the presence of electric arc touches the sound of breaker
Point can be by rapid ablation, so that the connection of breaker is influenced, since the contact area of sound contact is largely in contact
The heart, it is therefore necessary to which pilot arc is transferred out outward from the center of contact, i.e., is transferred to the arc root on stationary contact from center
Edge, then from edge transitions to arc striking piece.
Summary of the invention
The purpose of this utility model is to provide for a kind of contact structure of breaker, for accelerating electric arc on stationary contact
Transfer velocity, to improve the electric life and interrupting performance of breaker, it is ensured that the reliability of breaker entirety.
What the purpose of this utility model was such to reach, a kind of contact structure of breaker, comprising: a dynamic guide rod,
On be fixed with movable contact；One quiet guide rod, is fixed with stationary contact thereon；One is installed on the arc striking piece on quiet guide rod, the stationary contact
The generally rectangular shape of point, the stationary contact are removing outside a side far from arc striking piece, and in excess-three side an at least side
The height on side is higher than the height of stationary contact dot center.
In a specific embodiment of the utility model, first side of the stationary contact close to arc striking piece side
Height be higher than stationary contact dot center height.
In another specific embodiment of the utility model, perpendicular to two second sides of the first side
Height be higher than stationary contact dot center height.
In another specific embodiment of the utility model, the height of the first side and second side is higher than
The size of the height of stationary contact dot center is 2~3mm.
The utility model is due to after adopting the above structure, having the advantages that when movable contact and stationary contact are gradually disengaged
When, since the height of stationary contact point edge is higher than the height at center, the electric field strength of stationary contact point edge is higher than the electric field at center
Intensity, so that electric arc, which has, leaves contact center and fast transfer avoids electric arc in contact center to the trend of contact edges
Ablation, improve the electric life and interrupting performance of breaker, it is ensured that the reliability of breaker entirety.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first embodiment of the utility model.
Fig. 2 is the structural schematic diagram of second of embodiment of the utility model.
Fig. 3 is the structural schematic diagram of the third embodiment of the utility model.
In figure: 1. dynamic guide rods, 11. movable contacts；2. quiet guide rod, 21. stationary contacts, 211. first sides, 212. central planes,
213. second side；3. arc striking piece.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, but is not to the description of embodiment
Limitation to technical solution, it is any to change in the form rather than substance that all to should be considered as this practical new according to the utility model design
The protection scope of type.
FIG. 1 to FIG. 3 is please referred to, the utility model relates to a kind of contact structures of breaker, comprising: a dynamic guide rod 1, thereon
It is fixed with movable contact 11；One quiet guide rod 2, is fixed with stationary contact 21 thereon；One is installed on the arc striking piece 3 on quiet guide rod 2, described
The generally rectangular shape of stationary contact 21, the stationary contact 21 are removing outside a side far from arc striking piece 3, in excess-three side at least
There is the height of a side to be higher than the height at 21 center of stationary contact.Specifically, the height at 21 center of stationary contact is stationary contact
The height of the central plane 212 of point 21, the height of 21 side of stationary contact include the stationary contact 21 close to arc striking piece 3
The height of the height of the first side 211 of side and two second sides 213 perpendicular to the first side 211, stationary contact
The size that the height of the side of point 21 is higher than the height of the central plane 212 of stationary contact 21 is 2~3mm, to be conducive to electric arc
Contact edges are transferred to from contact center, avoid a large amount of ablations in contact center and influence the on-off of breaker.
The first embodiment, as shown in Figure 1, the stationary contact 21 is removing outside a side far from arc striking piece 3,
The height of remaining first side 211 and second side 213 is above the height of the central plane 212 of stationary contact 21.
Second of embodiment, as shown in Fig. 2, the height of two second sides 213 perpendicular to the first side 211
Higher than the height of the central plane 212 of stationary contact 21.
The third embodiment, as shown in figure 3, height of the stationary contact 21 close to the first side 211 of 3 side of arc striking piece
Degree is higher than the height of the central plane 212 of stationary contact 21.
Claims (4)
1. a kind of contact structure of breaker, comprising: a dynamic guide rod (1) is fixed with movable contact (11) thereon；One quiet guide rod (2),
It is fixed with stationary contact (21) thereon；One is installed on the arc striking piece (3) on quiet guide rod (2), it is characterised in that: the stationary contact
(21) generally rectangular shape, the stationary contact (21) are removing outside a side far from arc striking piece (3), in excess-three side at least
There is the height of a side to be higher than the height at stationary contact (21) center.
2. a kind of contact structure of breaker according to claim 1, it is characterised in that the stationary contact (21) is close
The height of the first side (211) of arc striking piece (3) side is higher than the height at stationary contact (21) center.
3. a kind of contact structure of breaker according to claim 2, it is characterised in that perpendicular to the first side
(211) height of two second sides (213) is higher than the height at stationary contact (21) center.
4. a kind of contact structure of breaker according to claim 2 or 3, it is characterised in that the first side
(211) and the height of second side (213) be higher than stationary contact (21) center height size be 2~3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920036176.0U CN209071254U (en) | 2019-01-09 | 2019-01-09 | A kind of contact structure of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920036176.0U CN209071254U (en) | 2019-01-09 | 2019-01-09 | A kind of contact structure of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209071254U true CN209071254U (en) | 2019-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920036176.0U Active CN209071254U (en) | 2019-01-09 | 2019-01-09 | A kind of contact structure of breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN209071254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494133A (en) * | 2019-01-09 | 2019-03-19 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact structure of breaker |
-
2019
- 2019-01-09 CN CN201920036176.0U patent/CN209071254U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494133A (en) * | 2019-01-09 | 2019-03-19 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact structure of breaker |
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