CN109509691B - Contact arc extinguishing device of circuit breaker and circuit breaker thereof - Google Patents
Contact arc extinguishing device of circuit breaker and circuit breaker thereof Download PDFInfo
- Publication number
- CN109509691B CN109509691B CN201910019026.3A CN201910019026A CN109509691B CN 109509691 B CN109509691 B CN 109509691B CN 201910019026 A CN201910019026 A CN 201910019026A CN 109509691 B CN109509691 B CN 109509691B
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- Prior art keywords
- contact
- arc
- guide rod
- movable
- static
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- 230000003068 static effect Effects 0.000 claims abstract description 80
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims 5
- 230000000171 quenching effect Effects 0.000 claims 5
- 239000004020 conductor Substances 0.000 claims 1
- 238000002679 ablation Methods 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a contact arc extinguishing device of circuit breaker and circuit breaker thereof, contact arc extinguishing device includes movable guide arm, quiet guide arm, rotatable striking piece and arc extinguishing bars piece group, is fixed with just moving contact and quiet contact on movable guide arm and the quiet guide arm respectively, characteristics: the arc striking piece is rotatably arranged on the static guide rod and is electrically connected with the static guide rod through soft connection, a first arc striking surface and a second arc striking surface which are opposite and can be contacted are respectively arranged on the movable guide rod and the arc striking piece, and in the process that the movable contact is contacted with the static contact, the first arc striking surface on the movable guide rod and the second arc striking surface on the arc striking piece are contacted with the static contact before the movable contact; in the process of separating the movable contact from the fixed contact, the first arc-guiding surface on the movable guide rod and the second arc-guiding surface on the arc-guiding sheet are separated from the movable contact. The circuit breaker comprises a plurality of contact extinguishing devices as described above. The movable contact and the static contact are in arc-free contact and arc-free breaking, and ablation of the movable contact and the static contact is reduced; the breaking capacity and the electrical life of the circuit breaker are improved.
Description
Technical Field
The invention belongs to the technical field of piezoelectric devices, and particularly relates to a contact arc-extinguishing device of a circuit breaker, and also relates to the circuit breaker using the contact arc-extinguishing device.
Background
The low-voltage circuit breaker is used as an important element of a low-voltage power grid, and particularly when a short circuit and a large current occur in the circuit, the circuit can be rapidly disconnected, so that the power grid is prevented from being damaged. The low-voltage circuit breaker generates an electric arc in the current breaking process, and if the electric arc is burned on the moving and static contacts for a long time and is not led into the arc extinguishing chamber, the current breaking failure can be caused; even if an arc can be introduced into the arc extinguishing chamber, if the arc cannot leave the moving and static contacts at a high speed, a great deal of burning loss on the surfaces of the moving and static contacts can still be caused, so that the overall electrical life of the circuit breaker is affected.
Therefore, before the arc resistance of the contact material has not been revolutionarily broken, in order to increase the electrical life of the circuit breaker, it is critical to increase the transfer speed of the arc, and it is common practice to install a structure for striking the arc, i.e. an arc striking plate, in the vicinity of the contact, and to artificially provide a guide path for the arc, so that the arc rapidly leaves the moving and static contacts and enters the arc extinguishing chamber. As shown in fig. 1, the contact arc extinguishing device adopting an arc striking sheet structure in the prior art comprises a movable guide rod 1, a static guide rod 2, an arc striking sheet 3 and an arc extinguishing grid sheet group 6, wherein the movable guide rod 1 and the static guide rod 2 are respectively fixed with a movable contact 11 and a static contact 21 which are opposite to each other, one end 34 of the arc striking sheet 3 and the static contact 21 are welded on the static contact 2 side by side, when current is disconnected, the movable guide rod 1 drives the movable contact 11 to be separated from the static contact 21, an electric arc 7 is generated between the movable contact 11 and the static contact 21, and then the electric arc 7 is transferred onto the arc striking plate 3 under the action of magnetic field force, so that the surface ablation of the static contact 21 is reduced. In addition, in the prior art, an arc contact is arranged at the end part of the movable guide rod, and the movable guide rod is installed in a staggered mode to realize quick transfer of an arc. For the former circuit breaker adopting the arc striking sheet structure, the effect of transferring the arc is different due to the different materials and structural forms of the arc striking sheet; the latter is that the dislocation installation of moving guide rod will increase the volume of moving contact system, increase moment of inertia, is unfavorable for miniaturization and high breaking capacity of circuit breaker, high life requirement. How to design a reasonable striking structure is a current research hot spot.
Disclosure of Invention
The invention aims at providing a contact arc-extinguishing device of a circuit breaker, which can rapidly transfer an electric arc to an arc-extinguishing chamber so as to extinguish the electric arc, realize the arc-free contact and arc-free breaking of a movable contact and a static contact, and effectively reduce the ablation of the movable contact and the static contact compared with the prior art.
Another task of the invention is to provide a circuit breaker applying the contact arc extinguishing device, which can improve the electrical life of the circuit breaker and ensure the comprehensive manifestation of the technical effects of the contact arc extinguishing device.
In order to complete the primary task, the technical scheme provided by the invention is as follows: the contact arc extinguishing device of the circuit breaker comprises a movable guide rod, a static guide rod, a rotatable arc striking plate and an arc extinguishing grid plate group, wherein a movable contact and a static contact which are opposite to each other are respectively fixed on the movable guide rod and the static guide rod, the arc striking plate is pivoted on the static guide rod and is electrically connected with the static guide rod through soft connection, a first arc striking surface and a second arc striking surface which are opposite to each other and can be contacted are respectively arranged on the movable guide rod and the arc striking plate, and in the process of contacting the movable contact with the static contact, the first arc striking surface on the movable guide rod and the second arc striking surface on the arc striking plate are contacted with the static contact in advance of the movable contact; in the process of separating the movable contact from the fixed contact, the first arc-guiding surface on the movable guide rod and the second arc-guiding surface on the arc-guiding sheet are separated from the movable contact.
In a specific embodiment of the invention, the arc striking piece comprises a supporting part close to the static contact, an arc striking part far away from the static contact and a bending part connecting the supporting part and the arc striking part, and the supporting part is not contacted with the static guide rod when the moving contact and the static contact are contacted.
In another specific embodiment of the present invention, the supporting portion is perpendicular to the static guide rod when the moving contact and the static contact are in contact.
In yet another embodiment of the present invention, the support is electrically connected to the static guide bar by a flexible connection.
In a further specific embodiment of the invention, a return spring is arranged between the striking plate and the static guide rod, and the return spring keeps the striking plate rotating around the rotation center line of the return spring towards the direction away from the static guide rod.
In a further specific embodiment of the present invention, a hinge hole is machined on the side surface of the supporting portion of the arc striking plate, a groove is formed in the position, corresponding to the supporting portion, of the static guide rod, a mounting hole is machined at the bottom of the groove, the right groove wall of the groove is a limiting surface, the supporting portion of the arc striking plate is inserted into the groove of the static guide rod, and the arc striking plate and the static guide rod pass through the hinge hole and the mounting hole through a pin to realize hinge.
In a further specific embodiment of the invention, the rotation of the striking plate about the center line O2 of the hinge hole and the mounting hole effects the hinged rotation of the striking plate relative to the static guide bar, and the return spring maintains the tendency of the striking plate to rotate about the center line O2 of the hinge hole and the mounting hole away from the static guide bar.
In a further specific embodiment of the present invention, the limiting surface of the groove cooperates with the supporting portion to limit the arc striking plate to further rotate, so as to ensure that the arc striking plate is not contacted with the arc extinguishing grid plate set.
In yet another specific embodiment of the present invention, the material of the striking plate is a high magnetic permeability material.
In order to accomplish another task, the technical scheme provided by the invention is as follows: a circuit breaker comprising a plurality of the above-described contact extinguishing devices.
The invention has one of the advantages that the rotary arc striking piece is arranged on the static guide rod, when the movable contact and the static contact are in a closed contact state, the arc striking piece contacts with the arc striking surface of the movable guide rod under the action force of the return spring, and in the process of contacting the movable contact with the static contact, the arc striking surface on the arc striking piece contacts with the arc striking surface on the movable guide rod before the movable contact contacts with the static contact; in the process of separating the movable contact from the fixed contact, an arc striking surface on the arc striking sheet and an arc striking surface on the movable guide rod are separated from the movable contact and the fixed contact, so that the movable contact and the fixed contact are in non-arc contact and non-arc breaking, and compared with a traditional contact arc extinguishing device, the ablation of the movable contact and the fixed contact is reduced; and when the circuit breaker with the contact arc extinguishing device is used for breaking current, the movable contact is in arc-free contact with the static contact and arc-free breaking is beneficial to improving breaking capacity and electrical service life of the circuit breaker.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a contact arc extinguishing device of a circuit breaker according to the prior art.
Fig. 2a is a schematic diagram of a structure of a circuit breaker in which a moving contact and a stationary contact of a contact arc extinguishing device of the present invention are in contact.
Fig. 2b is a schematic structural diagram of the contact arc extinguishing device of the circuit breaker according to the present invention when the moving contact and the fixed contact are just separated and the first arc striking surface and the second arc striking surface are still in contact.
Fig. 2c is a schematic structural diagram of the contact arc extinguishing device of the circuit breaker according to the present invention when the moving contact and the fixed contact are just separated and when the first arc striking surface and the second arc striking surface are separated to generate an arc.
Fig. 2d is a schematic structural view of the circuit breaker according to the present invention when the movable guide rod is opened to the maximum position.
Fig. 2e is a schematic structural diagram of the contact arc extinguishing device of the circuit breaker in the contact process of the moving contact and the fixed contact, when the first arc-guiding surface and the second arc-guiding surface just contact and the moving contact and the fixed contact are not contacted.
Fig. 3 is a schematic installation view of a static guide rod and an arc striking plate of a contact arc extinguishing device of the circuit breaker.
In the figure: 1. the movable guide rod, 11. The movable contact, 12. The first arc-guiding surface; 2. static guide rod, 21, static contact, 22, groove, 221, mounting hole, 222 and limit surface; 3. the arc striking piece, 31, the supporting part, 311, the hinge hole, 32, the arc striking part, 33, the bending part, 331, the second arc striking surface, 34 and one end; 4. soft connection; 5. a return spring; 6. arc extinguishing grating sheet group; 7. and (3) arc.
Detailed Description
The following detailed description of specific embodiments of the invention, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the invention, but rather should be construed to cover any and all modifications that may fall within the spirit and scope of the invention.
In the following description, all concepts related to the directions or azimuths of up, down, left, right, front and rear are based on the positions shown in fig. 2a, and thus should not be construed as being particularly limited to the technical solutions provided by the present invention.
Referring to fig. 2a to 2d in combination with fig. 3, the invention relates to a contact arc extinguishing device of a circuit breaker, which comprises a movable guide rod 1, a static guide rod 2, an arc striking sheet 3, a flexible connection 4, a return spring 5 and an arc extinguishing grid sheet group 6, wherein a movable contact 11 and a static contact 21 which are opposite to each other are respectively fixed on the movable guide rod 1 and the static guide rod 2, the arc striking sheet 3 can use a high magnetic conduction material, and the preferable high magnetic conduction material in the embodiment is iron. The arc striking plate 3 is hinged on the static guide rod 2 and consists of three parts, namely a supporting part 31 close to the static contact 21, an arc striking part 32 far away from the static contact 21, and a bending part 33 connecting the supporting part 31 and the arc striking part 32. The arc striking piece 3 and the static guide rod 2 are electrically connected through a soft connection 4, and specifically, the supporting part 31 is electrically connected with the static guide rod 2 through the soft connection 4. The side surface of the supporting part 31 of the striking plate 3 is provided with a hinge hole 311. The position of the static guide rod 2 corresponding to the supporting part 31 is provided with a groove 22, the bottom of the groove 22 is provided with a mounting hole 221, and the right side wall of the groove 22 is a limit surface 222. The arc striking plate 3 is inserted into the groove 22 of the static guide rod 2, and the arc striking plate 3 and the static guide rod 2 are hinged through the hinge hole 311 and the mounting hole 221 by a pin, so that the arc striking plate 3 rotates relative to the static guide rod 2 around the center line of the hinge hole 311 and the mounting hole 221, wherein the center line of the hinge hole 311 and the mounting hole 221 is set as O2, namely the arc striking plate 3 rotates around the center line O2. When the stationary contact 21 and the movable contact 11 are in contact, the supporting portion 31 is not in contact with the stationary guide 2, as shown in fig. 2a, the distance d between the supporting portion 31 and the stationary guide 2 is preferably the distance d between the supporting portion 31 and the stationary guide 2, in this embodiment, the supporting portion 31 is perpendicular to the stationary guide 2, and the movable guide 1 and the bending portion 33 are respectively provided with a first arc guiding surface 12 and a second arc guiding surface 331 which are opposite and can be contacted. The movable guide rod 1 rotates around the center line O1 during the process that the movable contact 11 leaves the stationary contact 21. A return spring 5 is arranged between the striking plate 3 and the static guide rod 2, and the return spring 5 keeps the tendency of the striking plate 3 to rotate anticlockwise around the central line O2, namely the return spring 5 keeps the tendency of the striking plate 3 to rotate around the rotation central line of the striking plate towards the direction far away from the static guide rod 2. The limiting surface 222 of the groove 22 is used for limiting the further rotation of the striking plate 3 by matching with the supporting part 31, so as to ensure that the striking plate 3 is not contacted with the arc extinguishing grid plate group 6.
With continued reference to fig. 2a to 2d, the specific arc extinguishing process of the contact arc extinguishing device of the circuit breaker is as follows:
As shown in fig. 2a, the movable guide rod 1 is in a closed position, that is, the movable contact 11 on the movable guide rod 1 contacts with the stationary contact 21 on the stationary guide rod 2, the second arc striking surface 331 on the arc striking plate 3 contacts with the first arc striking surface 12 of the movable guide rod 1 under the action of the spring force of the return spring 5, and at this time, the included angle between the arc striking part 32 on the arc striking plate 3 and the stationary guide rod 2 is θ2.
As shown in fig. 2b, in the process of turning the movable guide rod 1 around the central line O1 anticlockwise, that is, opening the contact upwards, after the movable contact 11 is disconnected from the fixed contact 21, the first arc striking surface 12 of the movable guide rod 1 still contacts with the second arc striking surface 331 of the bending portion 33 on the arc striking plate 3, and when the movable guide rod 1 continues to open upwards, the arc striking plate 3 turns around the central line O2 anticlockwise under the action of the spring force of the return spring 5, so that the included angle between the arc striking portion 32 and the fixed guide rod 2 is gradually increased.
As shown in fig. 2c, the moving guide rod 1 continues to rotate anticlockwise around the central line O1 until the first arc striking surface 12 of the moving guide rod 1 is separated from the second arc striking surface 331 on the arc striking plate 3, and the supporting portion 31 on the arc striking plate 3 rotates anticlockwise around the central line O2 under the action of the spring force of the return spring 5 until the supporting portion 31 contacts with the limiting surface 222, at this time, the clamping angle between the arc striking portion 32 on the arc striking plate 3 and the static guide rod 2 becomes θ1, and an arc 7 is generated between the first arc striking surface 12 of the moving guide rod 1 and the arc striking plate 3.
As shown in fig. 2d, when the movable guide rod 1 continues to rotate anticlockwise around the central line O1 to the maximum position, that is, when the movable guide rod 1 is opened to the maximum position, the arc 7 generated between the first arc striking surface 12 of the movable guide rod 1 and the arc striking plate 3 is elongated, and the arc 7 enters the arc extinguishing chamber under the action of electric power to be cut by the arc extinguishing grid plate group 6, so that the arc 7 is extinguished, breaking of the circuit breaker is realized, and meanwhile, burning of the arc 7 on the movable contact 11 and the fixed contact 12 is avoided.
As shown in fig. 2e, when the movable contact 11 and the stationary contact 12 come into contact again, the movable guide rod 1 rotates clockwise around the central line O1, and before the movable contact 11 comes into contact with the stationary contact 21, the first arc striking surface 12 on the movable guide rod 1 has already contacted the second arc striking surface 331 of the bent portion 33 on the arc striking plate 3, and the movable guide rod 1 continues to rotate clockwise around the central line O1 until the movable contact 11 comes into contact with the stationary contact 21, so as to realize the connection of the circuit breaker.
In summary, when the movable guide rod 1 rotates clockwise, that is, in the process of contacting the movable contact 11 with the stationary contact 21, the second arc-guiding surface 331 on the arc striking plate 3 contacts with the first arc-guiding surface 12 on the movable guide rod 1 before the movable contact 11 contacts with the stationary contact 21; in the process of separating the movable contact 11 from the stationary contact 21, the second arc striking surface 331 on the arc striking plate 3 is separated from the stationary contact 21 after the movable contact 11 is separated from the first arc striking surface 12 on the movable guide rod 1. The contact arc extinguishing device realizes the arc-free contact and arc-free breaking of the movable contact 11 and the fixed contact 21, thereby reducing the ablation of the movable contact 11 and the fixed contact 21 and being beneficial to improving the electric life of the circuit breaker.
Claims (10)
1. The utility model provides a contact arc extinguishing device of circuit breaker, includes a movable guide arm (1), a quiet guide arm (2), a rotatable striking piece (3) and an arc extinguishing bars piece group (6), movable guide arm (1) and quiet guide arm (2) on be fixed with just moving contact (11) and quiet contact (21) respectively, its characterized in that: the arc striking sheet (3) is pivoted on the static guide rod (2) and is electrically connected with the static guide rod (2) through a soft connection (4), a first arc striking surface (12) and a second arc striking surface (331) which are opposite and can be contacted are respectively arranged on the movable guide rod (1) and the arc striking sheet (3), and in the process of separating the movable contact (11) from the static contact (21), the first arc striking surface (12) on the movable guide rod (1) and the second arc striking surface (331) on the arc striking sheet (3) are separated from the static contact (21) after the movable contact (11); in the process that the movable contact (11) is contacted with the fixed contact (21), the first arc-guiding surface (12) on the movable guide rod (1) and the second arc-guiding surface (331) on the arc-guiding sheet (3) are contacted with the fixed contact (21) before the movable contact (11); in the opening process of the contact, after the movable guide rod (1) rotates anticlockwise to separate the movable contact (11) from the fixed contact (21), the first arc-guiding surface (12) is still in contact with the second arc-guiding surface (331), when the movable guide rod (1) continues to rotate anticlockwise, the arc-guiding sheet (3) is limited after rotating anticlockwise, and the movable guide rod (1) further rotates to separate the first arc-guiding surface (12) from the second arc-guiding surface (331), and an arc is generated between the first arc-guiding surface (12) and the arc-guiding sheet (3); in the contact closing process, the movable guide rod (1) rotates clockwise, the first arc-guiding surface (12) is contacted with the second arc-guiding surface (331) before the movable contact (11) is contacted with the fixed contact (21), and the movable guide rod (1) continues to rotate clockwise to enable the movable contact (11) to be contacted with the fixed contact (21), so that the circuit breaker is connected.
2. The contact extinguishing device of a circuit breaker according to claim 1, wherein: the arc striking piece (3) comprises a supporting part (31) close to the static contact (21), an arc striking part (32) far away from the static contact (21) and a bending part (33) connecting the supporting part (31) and the arc striking part (32), wherein the supporting part (31) is not contacted with the static guide rod (2) when the movable contact (11) is contacted with the static contact (21).
3. The contact extinguishing device of a circuit breaker according to claim 2, characterized in that: when the movable contact (11) is contacted with the stationary contact (21), the supporting part (31) is perpendicular to the stationary guide rod (2).
4. The contact extinguishing device of a circuit breaker according to claim 2, characterized in that: the supporting part (31) is electrically connected with the static guide rod (2) through the flexible connection (4).
5. The contact extinguishing device of a circuit breaker according to claim 2, characterized in that: a reset spring (5) is arranged between the arc striking piece (3) and the static guide rod (2), and the reset spring (5) keeps the trend that the arc striking piece (3) rotates around the rotation center line of the arc striking piece towards the direction far away from the static guide rod (2).
6. The contact quenching device of a circuit breaker as recited in claim 5, wherein: the side of the supporting part (31) of the arc striking piece (3) is provided with a hinge hole (311), the position of the static guide rod (2) corresponding to the supporting part (31) is provided with a groove (22), the groove bottom of the groove (22) is provided with a mounting hole (221), the right groove wall of the groove (22) is a limiting surface (222), the supporting part (31) of the arc striking piece (3) is inserted into the groove (22) of the static guide rod (2), and the arc striking piece (3) and the static guide rod (2) pass through the hinge hole (311) and the mounting hole (221) through a pin to realize hinge.
7. The contact quenching device of a circuit breaker as recited in claim 6, wherein: the arc striking piece (3) rotates around the central line (O2) of the hinge hole (311) and the mounting hole (221) to realize the hinge rotation of the arc striking piece (3) relative to the static guide rod (2), and the reset spring (5) keeps the trend that the arc striking piece (3) rotates around the central line (O2) of the hinge hole (311) and the mounting hole (221) towards the direction far away from the static guide rod (2).
8. The contact quenching device of a circuit breaker as recited in claim 6, wherein: the limiting surface (222) of the groove (22) is matched with the supporting part (31) to limit the arc striking sheet (3) to further rotate, so that the arc striking sheet (3) is prevented from contacting with the arc extinguishing grid sheet group (6).
9. A contact quenching device of a circuit breaker according to claim 1, characterized in that the material of the striking plate (3) is a high magnetic conductive material.
10. A circuit breaker, characterized in that: a contact quenching device comprising a plurality of circuit breakers according to any of the preceding claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910019026.3A CN109509691B (en) | 2019-01-09 | 2019-01-09 | Contact arc extinguishing device of circuit breaker and circuit breaker thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910019026.3A CN109509691B (en) | 2019-01-09 | 2019-01-09 | Contact arc extinguishing device of circuit breaker and circuit breaker thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109509691A CN109509691A (en) | 2019-03-22 |
| CN109509691B true CN109509691B (en) | 2024-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910019026.3A Active CN109509691B (en) | 2019-01-09 | 2019-01-09 | Contact arc extinguishing device of circuit breaker and circuit breaker thereof |
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| CN (1) | CN109509691B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341615B (en) * | 2020-03-26 | 2021-12-14 | 贵州泰永长征技术股份有限公司 | Floating static contact assembly device structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209199865U (en) * | 2019-01-09 | 2019-08-02 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact arc extinguishing device and its breaker of breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386629B1 (en) * | 2000-10-28 | 2003-06-02 | 엘지산전 주식회사 | Are extinguishing device in circuit breaker |
| CN101051579B (en) * | 2007-05-10 | 2010-06-09 | 浙江正泰电器股份有限公司 | Low voltage circuit breaker with quick actuating function |
| CN101236865A (en) * | 2008-02-26 | 2008-08-06 | 常熟开关制造有限公司(原常熟开关厂） | Contactor system for low-voltage breaker |
| CN102427009A (en) * | 2011-11-10 | 2012-04-25 | 江苏辉能电气有限公司 | Arc blowing device for low-voltage circuit breaker |
| CN207664013U (en) * | 2017-12-11 | 2018-07-27 | 上海电科电器科技有限公司 | Breaker of plastic casing |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209199865U (en) * | 2019-01-09 | 2019-08-02 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact arc extinguishing device and its breaker of breaker |
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| CN109509691A (en) | 2019-03-22 |
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