CN209071255U - A kind of structure of contact terminal of breaker - Google Patents
A kind of structure of contact terminal of breaker Download PDFInfo
- Publication number
- CN209071255U CN209071255U CN201920036567.2U CN201920036567U CN209071255U CN 209071255 U CN209071255 U CN 209071255U CN 201920036567 U CN201920036567 U CN 201920036567U CN 209071255 U CN209071255 U CN 209071255U
- Authority
- CN
- China
- Prior art keywords
- guide rod
- contact
- striking piece
- arc striking
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
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 arc striking piece on quiet guide rod, and the arc striking piece is L-shaped comprising one with quiet guide rod for connecting and the support portion being vertically set on quiet guide rod and one is arranged on striking portion on support portion and reversed with stationary contact；Wherein move moving part of the guide rod as structure of contact terminal, feature: the head of the dynamic guide rod is arranged close to arc striking piece, during dynamic guide rod is rotated along its rotation center and the movable contact that makes thereon is gradually distance from stationary contact, the lower edge and the distance between the support portion of the arc striking piece on the head of the dynamic guide rod are smaller and smaller.It can accelerate the trend that electric arc is transferred on arc striking piece from stationary contact, improve the electric life and interrupting performance 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 presence of L shape arc striking piece makes the electric field when sound contact is just opened, between movable contact and arc striking piece
Intensity is greater than the electric field strength between sound contact, so that the arc root of stationary contact is transferred on arc striking piece, so that electric arc be avoided to exist
Ablation on stationary contact.
Therefore, during moving contact is just opened, the distance between movable contact and arc striking piece directly affect arc transfer
Speed, if the distance is gradually increased with the open angle of moving contact, arc transfer speed can reduce, to extend electricity
Ablation time of the arc on stationary contact, increase the ablation amount of stationary contact, reduces the electric life and interrupting performance of breaker.
Summary of the invention
The task of the utility model is to provide for a kind of structure of contact terminal of breaker, can accelerate electric arc on stationary contact
Transfer velocity, to improve the electric life and interrupting performance of breaker.
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 arc striking piece on quiet guide rod, the striking
Piece is L-shaped comprising one with quiet guide rod for connecting and the support portion being vertically set on quiet guide rod and one is arranged on support portion
On and the striking portion reversed with stationary contact；Wherein move moving part of the guide rod as structure of contact terminal, the head of the dynamic guide rod
It is arranged close to arc striking piece, when dynamic guide rod rotates and the movable contact that makes thereon is gradually distance from the mistake of stationary contact along its rotation center
Cheng Zhong, the distance between the lower edge on the head of the dynamic guide rod and the support portion of the arc striking piece L are smaller and smaller.
In a specific embodiment of the utility model, the lower edge is one section of curved surface close to straight line.
In another specific embodiment of the utility model, the extended line of the lower edge and the support portion of arc striking piece
Between angle be acute angle.
The utility model is revolved in dynamic guide rod along its rotation center due to after adopting the above structure, having the advantages that
Turn and during the movable contact that makes thereon is gradually distance from stationary contact, move the head of guide rod lower edge and arc striking piece support portion it
Between distance it is smaller and smaller.When breaker sound contact can generate electric arc in opening procedure, due to the presence of arc striking piece, dynamic touching
Spacing between head and arc striking piece is less than the spacing between movable contact, stationary contact, so that the electric field strength of sound contact is small
Electric field strength between movable contact and arc striking piece can accelerate the trend that electric arc is transferred on arc striking piece from stationary contact in this way, from
And 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 sound contact contact condition schematic diagram of the utility model.
Fig. 2 is the status diagram when sound contact of the utility model is just opened.
Fig. 3 is that the status diagram after a distance is opened in the sound contact of the utility model.
In figure: 1. dynamic guide rods, 11. movable contacts, 12. heads, 121. lower edges；2. quiet guide rod, 21. stationary contacts；3. arc striking piece,
31. support portion, 32. striking portions.
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 arc striking piece 3 on quiet guide rod 2, the striking
Piece 3 is L-shaped comprising one with quiet guide rod 2 for connecting and the support portion 31 being vertically set on quiet guide rod 2 and one is arranged on branch
Striking portion 32 on support part 31 and reversed with stationary contact 21；Moving part of the guide rod 1 as structure of contact terminal is wherein moved, it is described dynamic
The head 12 of guide rod 1 is arranged close to arc striking piece 3, when dynamic guide rod 1 is rotated along its rotation center and makes movable contact 11 thereon
During being gradually distance from stationary contact 21, the head 12 of the dynamic guide rod 1 it is lower along 121 and the support portion 31 of the arc striking piece 3
The distance between L it is smaller and smaller.It is described it is lower along 121 be one section of curved surface close to straight line, extended line and striking under this along 121
Angle between the support portion 31 of piece 3 is acute angle.
When generating electric arc in breaker sound contact opening process, due to the presence of arc striking piece 3, moving contact 1 and arc striking piece 3
Between spacing be less than spacing between movable contact 11, stationary contact 21 so that the electricity between movable contact 11 and stationary contact 21
Field intensity is less than the electric field strength between movable contact 11 and arc striking piece 3, and electric arc is intended to be transferred on arc striking piece 3.Such as Fig. 2~figure
Shown in 3, with being gradually increased for dynamic 1 open angle of guide rod, the lower along 121 and the branch of the arc striking piece 3 of the head 12 of guide rod 1 is moved
The distance between support part 31 L is gradually reduced, i.e. L3 < L2, and is increased between the spacing between movable contact 11, stationary contact 21, then electric
Arc is gradually increased to the speed that arc striking piece 3 shifts, so that ablation time of the electric arc on stationary contact 21 reduces, namely is reduced
The ablation amount of stationary contact.
Claims (3)
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 arc striking piece (3) on quiet guide rod (2), and the arc striking piece (3) is L-shaped, packet
One is included for connecting with quiet guide rod (2) and the support portion (31) being vertically set on quiet guide rod (2) and one is arranged on support portion
(31) striking portion (32) on and reversed with stationary contact (21)；The moving part of guide rod (1) as structure of contact terminal is wherein moved,
Be characterized in that: the head (12) of the dynamic guide rod (1) is arranged close to arc striking piece (3), when dynamic guide rod (1) is along its rotation center
It rotates and during the movable contact (11) that makes thereon is gradually distance from stationary contact (21), the head (12) of the dynamic guide rod (1)
The distance between lower edge (121) and the support portion (31) of the arc striking piece (3) L are smaller and smaller.
2. a kind of structure of contact terminal of breaker according to claim 1, it is characterised in that the lower edge (121) is one section
Close to the curved surface of straight line.
3. a kind of structure of contact terminal of breaker according to claim 1, it is characterised in that the extension of the lower edge (121)
Angle between line and the support portion (31) of arc striking piece (3) is acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920036567.2U CN209071255U (en) | 2019-01-09 | 2019-01-09 | A kind of structure of contact terminal of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920036567.2U CN209071255U (en) | 2019-01-09 | 2019-01-09 | A kind of structure of contact terminal of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209071255U true CN209071255U (en) | 2019-07-05 |
Family
ID=67102603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920036567.2U Active CN209071255U (en) | 2019-01-09 | 2019-01-09 | A kind of structure of contact terminal of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209071255U (en) |
-
2019
- 2019-01-09 CN CN201920036567.2U patent/CN209071255U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203277183U (en) | Outdoor AC high-voltage disconnecting switch | |
| CN209071255U (en) | A kind of structure of contact terminal of breaker | |
| CN208873691U (en) | A kind of structure of contact terminal | |
| CN209071254U (en) | A kind of contact structure of breaker | |
| CN202076163U (en) | Miniature circuit breaker | |
| CN103000465A (en) | Contact system of novel high-capacity medium-voltage direct current breaker | |
| CN209071253U (en) | The structure of contact terminal of breaker | |
| CN211654684U (en) | Double-acting coupling type contact switch with variable electrode shape | |
| CN209199865U (en) | A kind of contact arc extinguishing device and its breaker of breaker | |
| CN203367084U (en) | Disconnector and high voltage switchgear | |
| CN109494133A (en) | A kind of contact structure of breaker | |
| CN203503534U (en) | Low voltage fuse type disconnecting switch | |
| CN109360762B (en) | Three-phase linkage isolating switch | |
| CN209071252U (en) | A kind of structure of contact terminal of breaker | |
| CN205177753U (en) | Novel circuit breaker | |
| CN201408696Y (en) | Contact finger device of high-voltage isolating switch contact | |
| CN103500680B (en) | Low voltage fuse type isolating switch | |
| CN109509691A (en) | A kind of contact arc extinguishing device and its breaker of breaker | |
| CN202058636U (en) | Arc extinguishing apparatus for improved self-energy type sulfur hexafluoride breaker | |
| CN110783139A (en) | Coupling type contact switch with variable electrode shape and method | |
| CN107203655B (en) | Numerical modeling method of hybrid direct current breaker | |
| CN201655717U (en) | Static contact device of plastic shell breaker | |
| CN201532898U (en) | Arc control device of high-voltage load switch | |
| CN208690161U (en) | A kind of inflatable cabinet load switch and its upper and lower contact of circular rod type | |
| CN205789824U (en) | The conducting system current limliting of a kind of case circuit breaker scolds opening apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |