CN212517099U - Arc extinguishing chamber of circuit breaker - Google Patents
Arc extinguishing chamber of circuit breaker Download PDFInfo
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- CN212517099U CN212517099U CN202021716003.2U CN202021716003U CN212517099U CN 212517099 U CN212517099 U CN 212517099U CN 202021716003 U CN202021716003 U CN 202021716003U CN 212517099 U CN212517099 U CN 212517099U
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Abstract
An arc extinguish chamber of a circuit breaker belongs to the technical field of low-voltage electrical appliances. The arc extinguishing chamber include first arc extinguishing bars group, second arc extinguishing bars group and third arc extinguishing bars group, first arc extinguishing bars group and third arc extinguishing bars group form by the horizontal interval arrangement of several pieces of vertically arranged arc extinguishing bars piece respectively, second arc extinguishing bars group form by the vertical interval arrangement of several pieces of horizontally arranged arc extinguishing bars piece to first arc extinguishing bars group, second arc extinguishing bars group and third arc extinguishing bars group top-down are adjacent to be arranged end to end in proper order, are opening face to moving, stationary contact "ɔ" shape structure. The advantages are that: the space between stationary contact and the vertical second arc extinguishing grid piece group can be effectively utilized, electric arcs are further lengthened, the high arc extinguishing capacity is achieved, and meanwhile, the structure is simple and the layout is reasonable.
Description
Technical Field
The utility model belongs to the technical field of low-voltage apparatus, concretely relates to explosion chamber of circuit breaker.
Background
The arc extinguishing chamber is an important component of the circuit breaker, and the capacity of the arc extinguishing chamber directly influences the breaking capacity and the electric service life of the circuit breaker, so that the electric performance of the circuit breaker is determined. In the existing arc extinguishing chamber of the circuit breaker, the magnetic field generated by the conductive loop drives the electric arc to enter the arc extinguishing chamber, and the long electric arc is cut into a plurality of sections of short arcs connected in series by arc extinguishing grids, so that the electric arc voltage is improved, and the arc extinguishing is realized. The existing research shows that the more the number of arc-extinguishing grid pieces for cutting long arcs is, the higher the arc voltage is, the larger the arc energy can be extinguished, and the better the breaking capacity and the electrical service life performance of the circuit breaker are. In order to effectively improve the arc extinguishing capability of the arc extinguishing chamber, particularly to extinguish high-voltage fault current, more arc extinguishing grid pieces need to be configured in the arc extinguishing chamber, and a conducting loop path needs to be reasonably configured, so that long electric arcs can be fully cut by the arranged grid pieces to improve the utilization rate of the arc extinguishing grid pieces.
The grid pieces of the existing arc extinguishing chamber of the circuit breaker are generally arranged in a vertical mode approximately parallel to the opening direction of the movable guide rod, the number of the arranged grid pieces is limited by the height of the arc extinguishing chamber, and in order to increase the number of the arc extinguishing grid pieces, a group of transverse arc extinguishing grid pieces are arranged above the original grid piece group and the movable guide rod. The arc-extinguishing grid plates are arranged in a direction substantially perpendicular to the original grid plates, and are formed into a "" structure. The structure can effectively utilize the upper space of the arc extinguishing chamber, increases the number of the arc extinguishing grid pieces, but has defects, and a space with the length similar to that of the transverse arc extinguishing grid piece group arranged above the movable guide rod is left between the static contact and the vertical arc extinguishing grid piece group of the circuit breaker and is not utilized. For the above space, the arc striking plate is generally used to extend from the static contact to the lower part of the vertical arc extinguishing grid group, but the structure only can play a role in guiding the arc motion and cannot improve the arc voltage, so that the purposes of improving the breaking capacity and the electric service life performance of the product cannot be achieved.
In view of the above-mentioned prior art, the applicant has made an advantageous design, and the technical solutions described below have been made in this context.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an explosion chamber of circuit breaker, simple structure, rationally distributed has higher ability of putting out arc.
The utility model aims at reaching like this, an explosion chamber of circuit breaker, the circuit breaker include moving contact and static contact, moving contact and static contact on be fixed with corresponding movable contact and stationary contact, its characterized in that respectively: the arc extinguishing chamber include first arc extinguishing bars group, second arc extinguishing bars group and third arc extinguishing bars group, first arc extinguishing bars group and third arc extinguishing bars group form by the horizontal interval arrangement of several pieces of vertically arranged arc extinguishing bars piece respectively, second arc extinguishing bars group form by the vertical interval arrangement of several pieces of horizontally arranged arc extinguishing bars piece to first arc extinguishing bars group, second arc extinguishing bars group and third arc extinguishing bars group top-down are adjacent to be arranged end to end in proper order, are opening face to moving, stationary contact "ɔ" shape structure.
In a specific embodiment of the present invention, the space between the adjacent end portions of the first arc-extinguishing grid piece group and the second arc-extinguishing grid piece group is a first fracture, and the first fracture is provided with a first arc-striking angle for connecting the arc entering the first arc-extinguishing grid piece group and the arc entering the second arc-extinguishing grid piece group, where the first arc-striking angle includes a first arc-striking piece i extending towards the inner cavity of the ɔ -shaped structure and biased towards the first arc-extinguishing grid piece group and a second arc-striking piece i extending towards the inner cavity of the ɔ -shaped structure and biased towards the second arc-extinguishing grid piece group; the space between the adjacent end parts of the second arc-extinguishing grid group and the third arc-extinguishing grid group is a second fracture, a second arc striking angle is arranged on the second fracture and used for connecting an electric arc entering the second arc-extinguishing grid group and an electric arc entering the third arc-extinguishing grid group, and the second arc striking angle comprises a first arc striking plate extending towards the ɔ -shaped structure inner cavity and biased towards the second arc-extinguishing grid group and a second arc striking plate extending towards the ɔ -shaped structure inner cavity and biased towards the third arc-extinguishing grid group.
In another specific embodiment of the present invention, the end of the first arc extinguishing grid set away from the second arc extinguishing grid set extends to the moving contact when the first arc extinguishing grid set is located at the open position, and the end of the third arc extinguishing grid set away from the second arc extinguishing grid set extends to the stationary contact.
In another specific embodiment of the present invention, a static contact arc striking plate is disposed between the static contact and the end of the third arc chute plate group extending to the static contact, and the static contact arc striking plate includes a first static contact arc striking plate extending from the end of the third arc chute plate group to the inner cavity of the ɔ -shaped structure, a third static contact arc striking plate extending from the static contact, and a second static contact arc striking plate connecting the first static contact arc striking plate and the third static contact arc striking plate; and a moving contact arc striking plate is arranged between the moving contact and one end of the first arc extinguishing grid group extending to the moving contact, and comprises a first moving contact arc striking plate extending from the end part of the first arc extinguishing grid group to an inner cavity of an ɔ -shaped structure, a third moving contact arc striking plate extending along the opening direction of the moving contact and a second moving contact arc striking plate connected with the first moving contact arc striking plate and the third moving contact arc striking plate.
In another specific embodiment of the present invention, the minimum distance between the first arc piece and the first moving contact arc striking plate, the minimum distance between the second arc piece and the first moving contact arc striking plate, and the minimum distance between the second arc piece and the first stationary contact arc striking plate are the same, and the sum of the three distances is close to the distance between the moving contact and the stationary contact.
In another specific embodiment of the present invention, the distance between the second moving contact arc ignition plate and the second static contact arc ignition plate is close to the distance between the moving contact and the static contact.
The utility model discloses a more and a concrete embodiment, first run-on plate one with first arc extinguishing grid group between the angle, first run-on plate two with second arc extinguishing grid group between the angle, static contact run-on plate one with first arc extinguishing grid group between the angle, second run-on plate one with second arc extinguishing grid group between the angle, second run-on plate two with second arc extinguishing grid group between the angle and static contact run-on plate one with third arc extinguishing grid group between the angle all between 30 to 45.
The utility model discloses on the basis of original L-shaped explosion chamber, add the third arc extinguishing grid group that extends to vertical second arc extinguishing grid group lower extreme by the stationary contact, compare with prior art, the beneficial effect who has is: the space between stationary contact and the vertical second arc extinguishing grid piece group can be effectively utilized, electric arcs are further lengthened, the high arc extinguishing capacity is achieved, and meanwhile, the structure is simple and the layout is reasonable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of arrangement of each arc-extinguishing grid plate in the first arc-extinguishing grid plate group, the second arc-extinguishing grid plate group or the third arc-extinguishing grid plate group according to the present invention.
Fig. 3 is a schematic view of an embodiment of an arc chute according to the present invention.
Fig. 4 is a schematic view of another embodiment of the arc chute of the present invention.
In the figure: 1. an integral support; 2. the first arc starting angle is 21, the first arc starting sheet is one, the first arc starting sheet is 22, the first arc starting sheet is two, and the first connection part is 23; 3. a second arc extinguishing grid group; 4. the arc extinguishing device comprises a first arc extinguishing grid group, 41, a moving contact arc striking plate, 411, a first moving contact arc striking plate, 412, a second moving contact arc striking plate, 413 and a third moving contact arc striking plate; 5. a second arc striking angle 51, a first arc striking piece 52, a second arc striking piece 53 and a second connecting part; 6. a third arc extinguishing grid group; 7. static contact; 8. a moving contact; 70. a static contact arc starting plate 71, a static contact arc starting plate I, a static contact arc starting plate 72, a static contact arc starting plate II, a static contact arc starting plate 73 and a static contact arc starting plate III; 91. a first break, 92, a second break.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.
Referring to fig. 1, the present invention relates to an arc extinguish chamber of a circuit breaker, wherein the circuit breaker includes a moving contact 8 and a static contact 7, the moving contact 8 and the static contact 7 are respectively fixed with a moving contact and a static contact corresponding to each other, the moving contact 8 rotates around a rotation center line of itself to realize the contact/separation of the moving contact and the static contact, thereby realizing the connection/disconnection of a circuit where the moving contact and the static contact are located. The arc extinguishing chamber is used for extinguishing electric arcs generated by separation of the moving contact 8 and the static contact 7, is located at the rear part of the moving contact 8 and the static contact 7 in the advancing direction of the electric arcs and comprises a first arc extinguishing grid group 4, a second arc extinguishing grid group 3 and a third arc extinguishing grid group 6, wherein the first arc extinguishing grid group 4, the second arc extinguishing grid group 3 and the third arc extinguishing grid group 6 are sequentially arranged end to end in an adjacent mode from top to bottom and are of an ɔ -shaped structure with an opening facing the moving contact and the static contact. In the vertical direction shown in fig. 1, the first arc-extinguishing grid group 4 is located above the position where the movable contact 8 is located when being opened, the third arc-extinguishing grid group 6 is located at the same horizontal position as the position where the stationary contact is located, and the third arc-extinguishing grid group 6 can also be located below the stationary contact 7.
Specifically, the arc extinguishing chamber is provided with an integral bracket 1 which is in an ɔ -shaped structure with an opening facing to the movable contact and the static contact. On the upper transverse bracket of the integral bracket 1, a plurality of arc-extinguishing grid plates which are longitudinally arranged are transversely stacked and arranged in the extending direction of the bracket to form a first arc-extinguishing grid plate group 4; on the lower transverse bracket of the integral bracket 1, a plurality of arc-extinguishing grid plates which are longitudinally arranged are transversely stacked and arranged in the extending direction of the bracket to form a third arc-extinguishing grid plate group 6; on the middle longitudinal support of the integral support 1, a plurality of arc-extinguishing grid plates which are transversely arranged are longitudinally stacked and arranged in the extending direction of the section of support to form the second arc-extinguishing grid plate group 3. Of course, segmented supports can also be used here, with three arc chute blade groups each having a support. In addition, the upper first and second plates shown in fig. 2 may be arranged in parallel and spaced apart from each other between the respective arc-extinguishing grids, or the two lowermost grids shown in fig. 2 may be arranged at a slight angle to each other. The arc chute may be substantially U-shaped as shown in fig. 3 or substantially rectangular as shown in fig. 4. The arc extinguishing grid pieces are made of metal materials, preferably high-resistance magnetic materials.
Further, a space between the adjacent end portions of the first arc-extinguishing grid group 4 and the second arc-extinguishing grid group 3 constitutes a first fracture 91, and the first fracture 91 is provided with a first arc striking angle 2 for connecting arcs entering the first arc-extinguishing grid group 4 and arcs entering the second arc-extinguishing grid group 3. The first arc striking angle 2 comprises a first arc striking plate 21 extending towards the ɔ -shaped structure cavity and biased towards the first arc extinguishing grid group 4, a second arc striking plate 22 extending towards the ɔ -shaped structure cavity and biased towards the second arc extinguishing grid group 3, and a first connecting part 23 connecting the first arc striking plate 21 and the second arc striking plate 22. The space between the adjacent end parts of the second arc-extinguishing grid group 3 and the third arc-extinguishing grid group 6 is a second fracture 92, and a second arc striking angle 5 is arranged on the second fracture 92 and used for connecting the electric arcs entering the second arc-extinguishing grid group 3 and the electric arcs entering the third arc-extinguishing grid group 6. The second arc striking angle 5 comprises a first arc striking plate 51 extending towards the ɔ -shaped structural cavity and biased towards the second arc extinguishing grid group 3, a second arc striking plate 52 extending towards the ɔ -shaped structural cavity and biased towards the third arc extinguishing grid group 6, and a second connecting part 53 connecting the first arc striking plate 51 and the second arc striking plate 52.
Further, one end of the first arc extinguishing grid group 4, which is far away from the second arc extinguishing grid group 3, extends to the movable contact 8 when the movable contact is located at the open position, and one end of the third arc extinguishing grid group 6, which is far away from the second arc extinguishing grid group 3, extends to the fixed contact 7. A static contact arc striking plate 70 is arranged between the static contact 7 and one end of the third arc-extinguishing grid group 6 extending towards the static contact 7, and the static contact arc striking plate 70 comprises a static contact arc striking plate first 71 extending from the end of the third arc-extinguishing grid group 6 to an inner cavity of the ɔ -shaped structure, a static contact arc striking plate third 73 extending from the static contact 7, and a static contact arc striking plate second 72 connecting the static contact arc striking plate first 71 and the static contact arc striking plate third 73. A moving contact arc striking plate 41 is arranged between the moving contact 8 and one end of the first arc extinguishing grid group 4 extending to the moving contact 8, and the moving contact arc striking plate 41 comprises a moving contact arc striking plate I411 extending from the end part of the first arc extinguishing grid group 4 to an inner cavity of an ɔ -shaped structure, a moving contact arc striking plate III 413 extending along the opening direction of the moving contact 8, and a moving contact arc striking plate II 412 connecting the moving contact arc striking plate I411 and the moving contact arc striking plate III 413.
Further, the sum of the minimum distance between the first arc ignition piece 21 and the movable contact arc ignition plate 411, the minimum distance between the first arc ignition piece 22 and the second arc ignition piece 51, and the minimum distance between the second arc ignition piece 52 and the fixed contact arc ignition plate 71 approaches to the opening distance between the movable contact and the fixed contact. The distance between the second moving contact arc ignition plate 412 and the second static contact arc ignition plate 72 is not greater than the opening distance between the moving contact and the static contact. The angle between the first arc striking plate 21 and the first arc extinguishing grid group 4, the angle between the first arc striking plate 22 and the second arc extinguishing grid group 3, the angle between the first static contact arc striking plate 71 and the first arc extinguishing grid group 4, the angle between the second arc striking plate 51 and the second arc extinguishing grid group 3, the angle between the second arc striking plate 52 and the second arc extinguishing grid group 3, and the angle between the first static contact arc striking plate 71 and the third arc extinguishing grid group 6 are all 30-45 degrees.
With continued reference to fig. 1, the operation of the present invention will be described. When the moving contact 8 is opened, an arc is generated when the moving contact is separated from the static contact 7, and an arc root firstly jumps to the moving contact arc starting plate three 413 of the moving contact arc starting plate 41 and the static contact arc starting plate 73 of the static contact arc starting plate 70 under the action of magnetic blowing. Because the distance between the second moving contact arc striking plate 412 and the second static contact arc striking plate 72 of the moving contact arc striking plate 41 is not greater than the opening distance between the moving contact and the static contact, the electric arc can enter the arc running channel between the second moving contact arc striking plate 412 and the second static contact arc striking plate 72 under the action of magnetic blowing, and can continuously move in the direction far away from the contact area, after the electric arc is contacted with the first arc striking angle 2 and the second arc striking angle 5, the electric arc is divided into three sections of electric arcs by the first arc striking angle 2, wherein the first section of electric arc is formed between the first moving contact arc striking plate 411 and the first moving contact arc striking plate 21, the second section of electric arc is formed between the second moving contact arc striking plate 22 and the first moving contact arc striking plate 51, and the third section of electric arc is formed between the second moving contact arc striking plate 52 and the third static contact arc striking plate 71. The first and second arcs are electrically connected to each other through the first connecting portion 23 of the first arc runner 2, and the second and third arcs are electrically connected to each other through the second connecting portion 53 of the second arc runner 5. In this embodiment, the movable contact arc striking plate 411 and the first arc striking plate 21, the first arc striking plate two 22 and the second arc striking plate one 51, the second arc striking plate two 52 and the static contact arc striking plate three 71 all form a "v" shape, and the minimum distance between the movable contact arc striking plate 411 and the first arc striking plate 21, the minimum distance between the first arc striking plate two 22 and the second arc striking plate one 51, and the minimum distance between the second arc striking plate two 52 and the static contact arc striking plate three 71 are close to the opening distance between the movable contact and the static contact, so that a part of the electric arc can easily enter between the movable contact arc striking plate one 411 and the first arc striking plate one 21, and move into the first arc extinguishing grid group 4 along the movable contact arc striking plate one 411 and the first arc striking plate one 21, and another part of the electric arc easily enters between the first arc striking plate two 22 and the second arc striking plate one 51, and enter the second arc-extinguishing grid group 3 along the first arc-striking plate two 22 and the second arc-striking plate one 51, and meanwhile, the electric arc of the third part easily enters between the second arc-striking plate two 52 and the static contact arc-striking plate three 71, and enters the third arc-extinguishing grid group 6 along the second arc-striking plate two 52 and the static contact arc-striking plate three 71, and is cut by the arc-extinguishing grid pieces, like the above, the second arc-extinguishing grid group 3 and the first arc-extinguishing grid group 4 can be fully utilized, thus achieving the purpose of the invention.
Claims (7)
1. The utility model provides an explosion chamber of circuit breaker, the circuit breaker include moving contact (8) and static contact (7), moving contact (8) and static contact (7) on be fixed with corresponding moving contact and stationary contact respectively, its characterized in that: the arc extinguishing chamber include first arc extinguishing bars group (4), second arc extinguishing bars group (3) and third arc extinguishing bars group (6), first arc extinguishing bars group (4) and third arc extinguishing bars group (6) form by the horizontal interval arrangement of several pieces of longitudinal arrangement's arc extinguishing bars piece respectively, second arc extinguishing bars group (3) form by the vertical interval arrangement of several pieces of transverse arrangement's arc extinguishing bars piece to first arc extinguishing bars group (4), second arc extinguishing bars group (3) and third arc extinguishing bars group (6) top-down are adjacent to be arranged end to end in proper order, are opening face to "ɔ" shape structure of moving, stationary contact.
2. The arc chute of the circuit breaker according to claim 1, characterized in that the space between the adjacent ends of the first (4) and second (3) arc chute groups constitutes a first break (91), said first break (91) being provided with a first arc runner (2) for connecting the arc entering the first (4) and second (3) arc chute groups, said first arc runner (2) comprising a first arc runner (21) extending towards the "ɔ" shaped structural cavity and biased towards the first arc chute group (4) and a second arc runner (22) extending towards the "ɔ" shaped structural cavity and biased towards the second arc chute group (3); the space between the adjacent end parts of the second arc-extinguishing grid group (3) and the third arc-extinguishing grid group (6) is formed into a second fracture (92), a second arc-striking angle (5) is arranged on the second fracture (92) and is used for connecting an electric arc entering the second arc-extinguishing grid group (3) and an electric arc entering the third arc-extinguishing grid group (6), and the second arc-striking angle (5) comprises a first second arc-striking plate (51) extending towards the ɔ -shaped structure inner cavity and biased towards the second arc-extinguishing grid group (3) and a second arc-striking plate (52) extending towards the ɔ -shaped structure inner cavity and biased towards the third arc-extinguishing grid group (6).
3. Arc chute of a circuit breaker according to claim 1, characterized in that the end of the first arc chute group (4) remote from the second arc chute group (3) extends towards the moving contact (8) when in the open position, and the end of the third arc chute group (6) remote from the second arc chute group (3) extends towards the stationary contact (7).
4. The arc extinguish chamber of the circuit breaker according to claim 2, wherein a fixed contact arc striking plate (70) is arranged between the fixed contact (7) and one end of the third arc extinguish grid group (6) extending towards the fixed contact (7), and the fixed contact arc striking plate (70) comprises a fixed contact arc striking plate I (71) extending from the end of the third arc extinguish grid group (6) to an inner cavity of the ɔ -shaped structure, a fixed contact arc striking plate III (73) extending from the fixed contact (7), and a fixed contact arc striking plate II (72) connecting the fixed contact arc striking plate I (71) and the fixed contact arc striking plate III (73); a moving contact arc striking plate (41) is arranged between the moving contact (8) and one end of the first arc extinguishing grid group (4) extending to the moving contact (8), and the moving contact arc striking plate (41) comprises a moving contact arc striking plate I (411) extending from the end part of the first arc extinguishing grid group (4) to an inner cavity of an ɔ -shaped structure, a moving contact arc striking plate III (413) extending along the opening direction of the moving contact (8) and a moving contact arc striking plate II (412) connecting the moving contact arc striking plate I (411) and the moving contact arc striking plate III (413).
5. The arc chute of a circuit breaker according to claim 4, characterized in that the minimum distance between the first tab one (21) and the movable contact tab one (411), the minimum distance between the first tab two (22) and the second tab one (51), and the minimum distance between the second tab two (52) and the stationary contact tab one (71) are the sum of the three distances close to the opening between the movable and stationary contacts.
6. The arc extinguish chamber of the circuit breaker as claimed in claim 4, wherein the distance between the second moving contact arc striking plate (412) and the second fixed contact arc striking plate (72) is close to the opening distance between the moving contact and the fixed contact.
7. The arc chute of a circuit breaker according to claim 4, characterized in that the angle between the first tab (21) and the first arc chute group (4), the angle between the first tab (22) and the second arc chute group (3), the angle between the first stationary contact tab (71) and the first arc chute group (4), the angle between the second tab (51) and the second arc chute group (3), the angle between the second tab (52) and the second arc chute group (3) and the angle between the first stationary contact tab (71) and the third arc chute group (6) are all between 30 ° and 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021716003.2U CN212517099U (en) | 2020-08-17 | 2020-08-17 | Arc extinguishing chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021716003.2U CN212517099U (en) | 2020-08-17 | 2020-08-17 | Arc extinguishing chamber of circuit breaker |
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| Publication Number | Publication Date |
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| CN212517099U true CN212517099U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021716003.2U Active CN212517099U (en) | 2020-08-17 | 2020-08-17 | Arc extinguishing chamber of circuit breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
| CN118098900A (en) * | 2024-04-28 | 2024-05-28 | 瑞睿电气(浙江)有限公司 | Arc extinguishing device of AC/DC circuit breaker |
-
2020
- 2020-08-17 CN CN202021716003.2U patent/CN212517099U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
| CN116313589B (en) * | 2023-04-06 | 2023-11-17 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
| CN118098900A (en) * | 2024-04-28 | 2024-05-28 | 瑞睿电气(浙江)有限公司 | Arc extinguishing device of AC/DC circuit breaker |
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