CN209071253U - The structure of contact terminal of breaker - Google Patents
The structure of contact terminal of breaker Download PDFInfo
- Publication number
- CN209071253U CN209071253U CN201920035847.1U CN201920035847U CN209071253U CN 209071253 U CN209071253 U CN 209071253U CN 201920035847 U CN201920035847 U CN 201920035847U CN 209071253 U CN209071253 U CN 209071253U
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- China
- Prior art keywords
- guide rod
- contact
- arc
- breaker
- head
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Abstract
A kind of structure of contact terminal 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 L-shaped arc striking piece on quiet guide rod；Moving part of the guide rod as structure of contact terminal is wherein moved, its main feature is that: the dynamic guide rod has head in the side close to arc striking piece, and the head is located at the center of rotation of dynamic guide rod in arc-shaped partially or fully, the center of circle on the head of the arc-shaped.With the erosion and wear between sound contact, dynamic guide rod will not contact always with arc striking piece, to guarantee the reliable contacts of sound contact, avoid the temperature rise of breaker, effectively improve the reliability of breaker.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, and in particular to a kind of structure of contact terminal of breaker.
Background technique
Critical elements of the low-voltage circuit breaker as low voltage electric network, main function are exactly when overcurrent occurs in power grid
Power grid can be cut off, to guarantee that other components are not damaged in power grid.
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, to influence the connection of breaker.To avoid a large amount of ablations of the electric arc on contact, need electric arc rapid
It is transferred out of sound contact, the means being usually taken are in one arc striking piece of place design close to contact, and the presence of arc striking piece makes
Dynamic/static contact when just opening, electric arc just can be quickly transferred on arc striking piece, to reduce the ablation of contact, improve breaker
Electric life and interrupting performance.
Particularly, for L-shaped arc striking piece, the head of moving contact is commonly designed to obtain very little at a distance from arc striking piece, so as to
In can rapid transferred arc, such bring consequence is: with the erosion and wear of sound contact, between moving contact and arc striking piece
Spacing can become smaller and smaller, until cause interference between moving contact and arc striking piece, causing between dynamic and static contact cannot can
By contact, it is in breaker and connects unstable state, such case can be significantly greatly increased the temperature rise of breaker, reduce breaker
Reliability.
Summary of the invention
The task of the utility model is to provide for a kind of structure of contact terminal of breaker, can guarantee the reliable of sound contact
Contact, the reliability of breaker is effectively improved to avoid temperature rise.
What the task of the utility model was performed by, a kind of structure of contact terminal 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 L-shaped arc striking piece on quiet guide rod；Wherein move
Moving part of the guide rod as structure of contact terminal, the dynamic guide rod have head, the head in the side close to arc striking piece
Portion is located at the center of rotation of dynamic guide rod in arc-shaped partially or fully, the center of circle on the head of the arc-shaped.
The utility model is due to after adopting the above structure, having the advantages that dynamic guide rod close to arc striking piece side
Arc-shaped partially or fully is presented in head, and the center of circle on the head of the arc-shaped is located at the center of rotation of dynamic guide rod, with sound
Erosion and wear between contact, dynamic guide rod will not be contacted with arc striking piece always, to guarantee the reliable contacts of sound contact, be avoided
The temperature rise of breaker effectively improves the reliability of breaker.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention.
In figure: 1. dynamic guide rods, 11. movable contacts, 12. heads；2. quiet guide rod, 21. stationary contacts；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.
Referring to Fig. 1, the utility model relates to a kind of structure of contact terminals of breaker, comprising: a dynamic guide rod 1 is fixed thereon
There is movable contact 11；One quiet guide rod 2, is fixed with stationary contact 21 thereon；One is installed on the L-shaped arc striking piece 3 on quiet guide rod 2；Wherein
Dynamic moving part of the guide rod 1 as structure of contact terminal, feature is: the dynamic guide rod 1 has head in the side close to arc striking piece 3
Portion 12, the head 12 are located at the rotation of dynamic guide rod 1 in arc-shaped partially or fully, the center of circle on the head 12 of the arc-shaped
Center.With the erosion and wear between sound contact, dynamic guide rod 1 will not contact always with L-shaped arc striking piece 3, to guarantee dynamic
The reliable contacts of stationary contact.Specifically, after breaker disjunction short circuit current or normal current, due to the presence of electric arc, sound
Contact can be reduced by a large amount of ablations, the i.e. thickness of movable contact 11 and stationary contact 21, and the contact point of sound contact can move down at this time,
I.e. dynamic guide rod 1 can be continued to move down a distance in a clockwise direction by position in Fig. 1, and the head 12 due to moving guide rod 1 is in
Arc-shaped, and the center of circle on the head 12 of arc-shaped is located at the rotation center of dynamic guide rod 1, thus no matter dynamic guide rod 1 move down it is more
Few distance, dynamic guide rod 1 will not be in contact with arc striking piece 3, to ensure that the reliable contacts of sound contact.
Claims (1)
1. a kind of structure of contact terminal 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 L-shaped arc striking piece (3) on quiet guide rod (2)；Guide rod (1) is wherein moved as touching
The moving part of header structure, it is characterised in that: the dynamic guide rod (1) has head in the side close to arc striking piece (3)
(12), the head (12) are located at dynamic guide rod (1) in arc-shaped partially or fully, the center of circle on the head (12) of the arc-shaped
Center of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035847.1U CN209071253U (en) | 2019-01-09 | 2019-01-09 | The structure of contact terminal of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035847.1U CN209071253U (en) | 2019-01-09 | 2019-01-09 | The structure of contact terminal of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209071253U true CN209071253U (en) | 2019-07-05 |
Family
ID=67102626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920035847.1U Active CN209071253U (en) | 2019-01-09 | 2019-01-09 | The structure of contact terminal of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209071253U (en) |
-
2019
- 2019-01-09 CN CN201920035847.1U patent/CN209071253U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |