CN206961782U - A kind of miniature circuit breaker and its arc-control device - Google Patents
A kind of miniature circuit breaker and its arc-control device Download PDFInfo
- Publication number
- CN206961782U CN206961782U CN201720641695.0U CN201720641695U CN206961782U CN 206961782 U CN206961782 U CN 206961782U CN 201720641695 U CN201720641695 U CN 201720641695U CN 206961782 U CN206961782 U CN 206961782U
- Authority
- CN
- China
- Prior art keywords
- arc
- contact portion
- movable contact
- cover body
- extinguish chamber
- 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.)
- Withdrawn - After Issue
Links
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a kind of miniature circuit breaker and its arc-control device, the miniature circuit breaker includes housing and the movable contact portion and stationary contact portion that are connected respectively with the housing, the movable contact portion is rotated to contact or separate with the stationary contact portion, wherein, the arc-control device includes arc-extinguish chamber, when closing a floodgate, the arc-extinguish chamber moves and exposes the movable contact portion so that the movable contact portion and the stationary contact portion are in contact, when the movable contact portion is rotated away from the separating brake in the stationary contact portion, the arc-extinguish chamber moves and coats the movable contact portion.Using miniature circuit breaker of the present utility model and its arc-control device, while movable contact portion is rotated away from stationary contact portion, coating movable contact portion by arc-extinguish chamber makes isolation and arc extinguishing, arc extinguishing between movable contact portion and stationary contact portion safe and reliable.
Description
Technical field
A kind of miniature circuit breaker is the utility model is related to, is to be related to a kind of compact-sized, appearance and size to meet specifically
Standard and can effective arc extinguishing intelligent miniature circuit breaker and its arc-control device.
Background technology
Miniature circuit breaker is most popular a kind of terminal protection electrical equipment during building electrical terminal power distribution equipment is drawn.It is miniature
Breaker is made up of close/open machine, contact portion, protection device, arc quenching system etc..Its operation principle is：Utilize protection device
(electrical apparatus release) and electrical current heat component realize overload and short-circuit protection, when the electric current that the coil in electrical current heat component passes through is more than setting
Current value when, magnetictrip dynamic iron core action, promote strike bar hit operating mechanism, unlock operating mechanism, make to break
Road device separating brake and then disconnecting circuit, so as to realize overload and short-circuit protection to circuit.After fault is discharged, then by dividing
Switching-on mechanism carries out closing operation so as to connect circuit.At present, most miniature circuit breakers that China uses now are manual point
Combined floodgate formula, manually stir close/open machine can and make-break operation is carried out to circuit.Manual divide-shut brake formula miniature circuit breaker
It is simple in construction, cost is cheap and does not need extra electric energy, thus divide-shut brake behaviour can be carried out in the case of without electric energy
Make, be widely used in old power network.
But with the development of science and technology, intelligent appliance has obtained more and more extensive application, as protection electrical equipment
Common miniature circuit breaker, also it is badly in need of installing intelligence control system additional.In order to common miniature disconnected with wide variety of manual divide-shut brake formula
Road device matches, now, mainly newly-increased one of common miniature circuit breaker side can with the intelligent micro-circuit breaker of remote control,
Intelligent miniature circuit breaker drives other common miniature circuit breakers to carry out breaking-closing operating according to input control signal.
《The external Circuit breaker technology specification of electric energy meter》In strict specification carried out to the appearance and size of breaker limited, its
In, restriction intelligent micro-circuit breaker is consistent with the outer shape and size of common miniature circuit breaker, to ensure the consistent of outward appearance
Property, and the convenient large-scale circuit breaker terminal equipment replacement of progress.
But the intelligent micro-circuit breaker of prior art, due to adding intelligent controlling device, its size is typically than common
Miniature circuit breaker size is big, also inconsistent in profile, can not directly use, and the basis first to placing miniature circuit breaker is needed before use
Equipment carries out adaptability reform, and early investment is big, long in time limit, is unfavorable for intelligent grid and promotes process.
Disjunction circuit is switched in power system arc discharge occurs, therefore it is required that switch can be promptly in very little
Make arc extinction in closed vessel.The arc extinguishing component of intelligent micro-circuit breaker typically leads to arc extinguishing using by electric arc in the prior art
The mode of room, but not fully reach the effect of effective arc extinguishing.
Utility model content
The purpose of this utility model is to provide a kind of arc-control device and carries out the miniature disconnected of arc extinguishing using the arc-control device
Road device, is not only simple in structure, and occupies little space.
To achieve these goals, arc-control device of the present utility model, it is described miniature disconnected applied in a miniature circuit breaker
Road device includes housing and the movable contact portion and stationary contact portion that are connected respectively with the housing, the movable contact portion rotate with
The contact of stationary contact portion or separation, wherein, the arc-control device includes arc-extinguish chamber, and when closing a floodgate, the arc-extinguish chamber motion is simultaneously
Expose the movable contact portion so that the movable contact portion and the stationary contact portion are in contact, institute is rotated away from the movable contact portion
When stating the separating brake in stationary contact portion, the arc-extinguish chamber moves and coats the movable contact portion.
In one embodiment of above-mentioned arc-control device, the arc-extinguish chamber rotation connection is on the housing and including stirring
Portion and arc extinguishing portion, have space between the clicking section and arc extinguishing portion, the movable contact portion turns to the space and drives institute
Clicking section rotation is stated, the arc extinguishing portion is inserted between the movable contact portion and stationary contact portion.
In one embodiment of above-mentioned arc-control device, the arc extinguishing portion is U-shaped, and is connected with clicking section, described to go out
The space formed between arc portion and clicking section forms the cover body for accommodating the movable contact portion.
In one embodiment of above-mentioned arc-control device, the arc-extinguish chamber includes the first arc-extinguish chamber and the second arc-extinguish chamber, institute
State the connection of the first arc-extinguish chamber on the housing, second arc-extinguish chamber is socketed in the movable contact portion, described when separating brake
Second arc-extinguish chamber is moved and docked with first arc-extinguish chamber.
In one embodiment of above-mentioned arc-control device, the movable contact portion is rotatably connected on by a movable contact linking arm
On the housing.
In one embodiment of above-mentioned arc-control device, second arc-extinguish chamber includes cover body portion, and the cover body portion passes through
The movable contact linking arm is socketed in the movable contact portion and can moved along the movable contact linking arm to leave or wrap
Cover the movable contact portion.
In one embodiment of above-mentioned arc-control device, second arc-extinguish chamber also includes cover body connecting portion, the cover body
The both sides of connecting portion are respectively articulated with housing and the cover body portion.
In one embodiment of above-mentioned arc-control device, before the cover body portion includes cover body antetheca and is connected to the cover body
Cover body connection wall on wall, have on the cover body antetheca and walk hole for what the movable contact portion passed through.
In one embodiment of above-mentioned arc-control device, first arc-extinguish chamber is corresponding with the cover body antetheca, in point
During lock, first arc-extinguish chamber is relative with the cover body antetheca to be connect.
The utility model also provides a kind of miniature circuit breaker, including housing, the movable contact that is connected respectively with the housing
Portion and stationary contact portion and arc-control device, the movable contact portion are rotated to contact or separate with the stationary contact portion, wherein, it is described
Arc-control device is above-mentioned arc-control device.
Beneficial functional of the present utility model is, using miniature circuit breaker of the present utility model and its arc-control device, moves and touches
While point portion is rotated away from stationary contact portion, coating movable contact portion by arc-extinguish chamber makes to isolate between movable contact portion and stationary contact portion
And arc extinguishing, arc extinguishing are safe and reliable.
The utility model is described in detail below in conjunction with the drawings and specific embodiments, but not as to the utility model
Restriction.
Brief description of the drawings
Fig. 1 is the structural representation of the "on" position of the first embodiment of arc-control device of the present utility model；
Fig. 2 is the first embodiment of arc-control device of the present utility model from "on" position to knot during gate-dividing state transition
Structure schematic diagram；
Fig. 3 is the structural representation of the gate-dividing state of the first embodiment of arc-control device of the present utility model；
Fig. 4 a are the structural representation when first embodiment of arc-control device of the present utility model uses；
Fig. 4 b are the structural representation when first embodiment (removal partial sidewall) of arc-control device of the present utility model uses
Figure；
Fig. 5 is the structural representation of the "on" position of the second embodiment of arc-control device of the present utility model；
Fig. 6 is the second embodiment of arc-control device of the present utility model from "on" position to knot during gate-dividing state transition
Structure schematic diagram；
Fig. 7 is the structural representation of the gate-dividing state of the second embodiment of arc-control device of the present utility model；
Fig. 8 is Fig. 6 partial enlarged drawing.
Wherein, reference
10 miniature circuit breakers
100 housings
200 movable contact portions
300 stationary contact portions
400 lead-in wire terminals
500 arc-extinguish chambers
510 clicking sections
520 arc extinguishing portions
521 bottom walls
540 connecting portions
600 moving contact components
610 arc access piece
611 first curved portions
620 movable contact parts
621 second curved portions
622 movable contact linking arms
700 arc-extinguish chambers
710 first arc-extinguish chambers
720 second arc-extinguish chambers
721 cover body portions
721a cover body antethecas
721b cover body rear walls
721c cover body connection walls
722 cover body connecting portions
Embodiment
Technical solutions of the utility model are described in detail with specific embodiment below in conjunction with the accompanying drawings, with further
Understand the purpose of this utility model, scheme and effect, but be not intended as the limit of the appended claims for the utility model protection domain
System.
Arc-control device of the present utility model can be applied in a miniature circuit breaker, can be naturally also applied to other types of need
In the switching device for carrying out arc extinguishing, arc extinguishing is reliable rapidly, effectively avoids switching device from producing the harm that electric arc is brought.Below with should
For being illustrated in miniature circuit breaker.
As shown in figure 1, miniature circuit breaker 10 includes housing 100, movable contact portion 200 and stationary contact portion 300, movable contact portion
200 and stationary contact portion 300 be connected respectively with housing 100.Miniature circuit breaker 10 in working condition, movable contact portion 200 with it is quiet
Contact portion 300 is normally off, i.e., movable contact portion 200 contacts with each other with stationary contact portion 300；Miniature circuit breaker 10 is in shapes such as open circuits
During state, movable contact portion 200 can be touched, and now movable contact portion 200 rotates and separated with stationary contact portion 300；Movable contact portion 200 with
Stationary contact portion 300 can produce voltage difference when separating, so as to generate electric arc.
Arc-control device of the present utility model includes arc-extinguish chamber 500, as shown in figure 1, when closing a floodgate, arc-extinguish chamber 500 moves simultaneously
Expose movable contact portion 200 so that movable contact portion 200 and stationary contact portion 300 are in contact.As shown in figure 3, rotated in movable contact portion 200
When leaving the separating brake in stationary contact portion 300, arc-extinguish chamber 500 moves and coats movable contact portion 200, to cut off in movable contact portion rapidly
Between 200 and stationary contact portion 300 due to separating brake caused electric arc, avoid electric arc from endangering.
First embodiment
For the structure of arc-control device in the present embodiment as shown in figure 4, with reference to Fig. 1 to Fig. 3, arc-extinguish chamber 500 is insulating materials
It is made and is rotatably connected on housing 100, and, arc-extinguish chamber 500 includes clicking section 510 and arc extinguishing portion 520, clicking section 510 and goes out
There is space G between arc portion 520, movable contact portion 200 turns to space G and drives clicking section 510 and arc extinguishing portion 520 to rotate,
Arc extinguishing portion 520 is inserted between movable contact portion 200 and stationary contact portion 300 with arc extinguishing.
It is preferred that arc extinguishing portion 520 is U-shaped, and is connected with clicking section 510, institute between clicking section 510 and arc extinguishing portion 520
The space of formation forms the cover body for accommodating movable contact portion 200.During combined floodgate, arc-extinguish chamber 500 is located at the side in movable contact portion 200, point
During lock, clicking section 510 is stirred to drive arc-extinguish chamber 500 to rotate by movable contact portion 200, and is dialled as movable contact portion 200 progresses into
The dynamic space formed between portion 510 and arc extinguishing portion 520, arc-extinguish chamber 500 gradually envelope movable contact portion 200, reach anti-stop
The purpose of electric arc is produced between contact portion 200 and stationary contact portion 300.
Specifically, arc-extinguish chamber 500 is rotatably connected on housing 100 by connecting portion 540.Movable contact portion 200 rotate from
Clicking section 510 can be stirred when holding stationary contact portion 300, arc extinguishing portion 520 is rotated from initial position to arc extinguishing position.Connecting portion 540
On hole and rotary shaft gap can be used to coordinate so that arc-extinguish chamber 500 can freely rotate around rotary shaft.
Clicking section 510 and arc extinguishing portion 520 are both connected on connecting portion 540, and arc extinguishing portion 520 includes bottom wall 521, bottom wall 521
With respect to 510 curved shape of clicking section.
With stationary contact portion 300 by being separated into closing course, movable contact portion 200 rotates counterclockwise in movable contact portion 200, this
When movable contact portion 200 no longer clicking section 510 is exerted a force.Because the side with arc extinguishing portion 520 of arc-extinguish chamber 500 is heavier, arc extinguishing
500 are covered because Action of Gravity Field rotates clockwise, what movable contact portion 200 was gradually formed between arc extinguishing portion 520 and clicking section 510
Exited in space, movable contact portion 200 is in contact with stationary contact portion 300, closes a floodgate and completes, and arc-extinguish chamber 500 is returned back to positioned at movable contact
The state of the side in portion 200.
Second embodiment
Refering to Fig. 5 to Fig. 7, in the present embodiment, arc-extinguish chamber 700 includes the first arc-extinguish chamber 710 and the second arc-extinguish chamber 720, and
One arc-extinguish chamber 710 is connected on housing 100, and the second arc-extinguish chamber 720 is socketed in movable contact portion 200, when separating brake, the second arc extinguishing
Cover 720 is moved and docked with the first arc-extinguish chamber 710, to envelope movable contact portion 200, so as to cut off rapidly in movable contact portion 200
Caused electric arc, avoids electric arc from endangering between stationary contact portion 300.
Wherein, it is rotatably connected on reference to Fig. 8, movable contact portion 200 by a movable contact linking arm on housing 100.Specifically,
Miniature circuit breaker 10 also includes lead-in wire terminal 400, kick component and moving contact component 600.Moving contact component 600 connects including arc
Enter part 610 and movable contact part 620.Arc access piece 610 is, for example, copper electric-conductor, for being electrically connected with lead-in wire terminal 400, and is wrapped
The first curved portions 611 are included, the first curved portions 611 electrically connect with lead-in wire terminal 400.Movable contact part 620 is, for example, copper electric-conductor, including
The second curved portions 621, movable contact linking arm 622 and the movable contact portion 200 being sequentially connected, i.e. the second curved portions 621 and movable contact
Portion 200 is connected to the both ends of movable contact linking arm 622.Second curved portions 621 correspond to the first arc of arc access piece 610
Shape portion 611 is set, i.e. the second curved portions 621 be connected with the first curved portions 611 with by electricity pass sequentially through the second curved portions 621,
Movable contact linking arm 622 is simultaneously conducted to movable contact portion 200.Wherein, the second curved portions 621 of movable contact part 620 are relative to arc
First curved portions 611 of access piece 610 can rotate, and the second curved portions 621 of movable contact part 620 are relative to arc access piece
When 610 the first curved portions 611 rotate, to drive the movable contact portion 200 of the other end of movable contact part 620 to be pasted with stationary contact portion 300
Close or separate.It should be noted, in a upper embodiment, movable contact portion 200 and the movable contact part comprising the movable contact portion can also be set
It is set to above-mentioned form.
Second arc-extinguish chamber 720 includes cover body portion 721, and cover body portion 721 is socketed in movable contact portion by movable contact linking arm 622
On 200, and it can be moved along movable contact linking arm 622 to leave or coat movable contact portion when movable contact portion 200 rotates
200。
Second arc-extinguish chamber 720 also includes cover body connecting portion 722, and cover body portion 721 is connected to housing by cover body connecting portion 722
On 100, the both ends of cover body connecting portion 722 are respectively articulated with housing 100 and cover body portion 721.Movable contact portion 200 rotate clockwise with from
When opening stationary contact portion 300, cover body portion 721 transports to the left in the presence of movable contact linking arm 622 and cover body connecting portion 722
It is dynamic, i.e., moved towards the direction in movable contact portion 200, and gradually envelope movable contact portion 200.Movable contact portion 200 rotates counterclockwise
During with convergence stationary contact portion 300, cover body portion 721 transports to the right in the presence of movable contact portion 200 and cover body connecting portion 722
Dynamic, i.e., the opposite direction towards the place direction of movable contact portion 200 is moved, and is gradually left movable contact portion 200 and is moved to movable contact company
Connect on arm 622, movable contact portion 200 and stationary contact portion 300 are in contact combined floodgate.
As shown in figure 8, cover body portion 721 includes cover body antetheca 721a, cover body rear wall 721b and cover body connection wall 721c, cover
There is confession on body connection wall 721c connections cover body antetheca 721a and cover body rear wall 721b, cover body antetheca 721a and cover body rear wall 721b
What movable contact portion 200 and movable contact linking arm 622 passed through walks hole A.
First arc-extinguish chamber 710 is corresponding with the cover body antetheca 721a in the cover body portion 721 of the second arc-extinguish chamber 720.During combined floodgate, move
Contact portion 200 passes walking hole A and being in contact with stationary contact portion 300 on cover body antetheca 721a；During separating brake, movable contact portion 200
Retreat and pass through the hole A that walks on cover body antetheca 721a cover body portion 721 is enveloped movable contact portion 200, and the first arc-extinguish chamber 710
Connect relative with the cover body antetheca 721a of the second arc-extinguish chamber 720 walks hole A, arc-extinguish chamber 700 to block on cover body antetheca 721a
Movable contact portion 200 is enveloped completely so that movable contact portion 200 is isolated and arc extinguishing with stationary contact portion 300.
It is of course also possible to only set cover body connection wall 721c, cover body antetheca 721a, cover body rear wall 721b, cover body are not provided with
Hole before and after connection wall 721c is formed walks hole A for what movable contact portion 200 and movable contact linking arm 622 passed through.
Certainly, the utility model can also have other various embodiments, without departing substantially from the utility model spirit and its essence
In the case of, those skilled in the art work as can make various corresponding changes and deformation according to the utility model, but these
Corresponding change and deformation should all belong to the scope of the claims appended by the utility model.
Claims (10)
1. a kind of arc-control device, applied in a miniature circuit breaker, the miniature circuit breaker include housing and respectively with it is described
The movable contact portion and stationary contact portion that housing is connected, the movable contact portion are rotated to contact or separate with the stationary contact portion, its
Be characterised by, the arc-control device includes arc-extinguish chamber, in close a floodgate when, the arc-extinguish chamber move and expose the movable contact portion so that
The movable contact portion and the stationary contact portion are in contact, when the movable contact portion is rotated away from the separating brake in the stationary contact portion,
The arc-extinguish chamber moves and coats the movable contact portion.
2. arc-control device according to claim 1, it is characterised in that arc-extinguish chamber rotation connection on the housing and
Including clicking section and arc extinguishing portion, there is space between the clicking section and arc extinguishing portion, the movable contact portion turns to the space
And driving the clicking section to rotate, the arc extinguishing portion is inserted between the movable contact portion and stationary contact portion.
3. arc-control device according to claim 2, it is characterised in that the arc extinguishing portion is U-shaped, and is connected with clicking section
Connect, the space formed between the arc extinguishing portion and clicking section forms the cover body for accommodating the movable contact portion.
4. arc-control device according to claim 1, it is characterised in that the arc-extinguish chamber goes out including the first arc-extinguish chamber and second
Arc cover, on the housing, second arc-extinguish chamber is socketed in the movable contact portion, in separating brake for the first arc-extinguish chamber connection
When, second arc-extinguish chamber is moved and docked with first arc-extinguish chamber.
5. arc-control device according to claim 4, it is characterised in that the movable contact portion is turned by a movable contact linking arm
Dynamic connection is on the housing.
6. arc-control device according to claim 5, it is characterised in that second arc-extinguish chamber includes cover body portion, the cover
Body portion be socketed in the movable contact portion and can be moved along the movable contact linking arm by the movable contact linking arm with
Leave or coat the movable contact portion.
7. arc-control device according to claim 6, it is characterised in that second arc-extinguish chamber also includes cover body connecting portion,
The both sides of the cover body connecting portion are respectively articulated with housing and the cover body portion.
8. arc-control device according to claim 6, it is characterised in that the cover body portion includes cover body antetheca and is connected to institute
The cover body connection wall on cover body antetheca is stated, has on the cover body antetheca and walks hole for what the movable contact portion passed through.
9. arc-control device according to claim 8, it is characterised in that first arc-extinguish chamber is relative with the cover body antetheca
Should, when separating brake, first arc-extinguish chamber is relative with the cover body antetheca to be connect.
10. a kind of miniature circuit breaker, including housing, the movable contact portion that is connected respectively with the housing and stationary contact portion and go out
Arc device, the movable contact portion are rotated to contact or separate with the stationary contact portion, it is characterised in that the arc-control device is power
Profit requires the arc-control device described in 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720641695.0U CN206961782U (en) | 2017-06-05 | 2017-06-05 | A kind of miniature circuit breaker and its arc-control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720641695.0U CN206961782U (en) | 2017-06-05 | 2017-06-05 | A kind of miniature circuit breaker and its arc-control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206961782U true CN206961782U (en) | 2018-02-02 |
Family
ID=61379798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720641695.0U Withdrawn - After Issue CN206961782U (en) | 2017-06-05 | 2017-06-05 | A kind of miniature circuit breaker and its arc-control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206961782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987208A (en) * | 2017-06-05 | 2018-12-11 | 周思雨 | A kind of miniature circuit breaker and its arc-control device |
-
2017
- 2017-06-05 CN CN201720641695.0U patent/CN206961782U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987208A (en) * | 2017-06-05 | 2018-12-11 | 周思雨 | A kind of miniature circuit breaker and its arc-control device |
| CN108987208B (en) * | 2017-06-05 | 2024-04-02 | 周思雨 | Miniature circuit breaker and arc extinguishing device thereof |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180202 Effective date of abandoning: 20240402 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180202 Effective date of abandoning: 20240402 |