CN108538687A - A kind of contact arc-extinguishing system of breaker - Google Patents
A kind of contact arc-extinguishing system of breaker Download PDFInfo
- Publication number
- CN108538687A CN108538687A CN201810362518.8A CN201810362518A CN108538687A CN 108538687 A CN108538687 A CN 108538687A CN 201810362518 A CN201810362518 A CN 201810362518A CN 108538687 A CN108538687 A CN 108538687A
- Authority
- CN
- China
- Prior art keywords
- arc
- grid pieces
- breaker
- silver point
- extinguishing grid
- 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.)
- Pending
Links
- 230000003068 static effect Effects 0.000 claims abstract description 32
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 69
- 229910052709 silver Inorganic materials 0.000 claims description 69
- 239000004332 silver Substances 0.000 claims description 69
- 230000008859 change Effects 0.000 claims description 3
- 238000010791 quenching Methods 0.000 abstract description 11
- 230000000171 quenching effect Effects 0.000 abstract description 11
- 230000008033 biological extinction Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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 invention discloses a kind of contact arc-extinguishing systems of breaker, it includes arc-chutes (1) and contact system (2), the contact system (2) includes movable contact system (201) and static contact system (202), the engagement or disjunction of the movable contact system (201) and static contact system (202) control the break-make of breaker circuit, it is characterised in that：The static contact system (202) includes static contact panel (202a), the front end of the static contact panel (202a) is equipped with arc leading angle (202a03), the arc leading angle (202a03) is trapezoidal dovetail shaped, and the arc extinguishing grid pieces group (103) of the arc-chutes (1) is in the figure of three.The contact arc-extinguishing system of the breaker enhances the arc extinction ability of arc-chutes by the improvement to contact of breaker arc quenching system, it is ensured that the electrical endurance and breaking capacity of frame circuit breaker reach relevant criterion requirement.
Description
Technical field
The invention belongs to low voltage electrical apparatus technology field, specifically technology is related to a kind of contact arc-extinguishing system of breaker,
Suitable for direct current and AC power supply system.
Background technology
Breaker is most important controller switching equipment in low-voltage distribution system, with power engineering team power supply and equipment for power transmission and distribution
It is required that continuous improvement, miniaturization, high-performance, modularization, height also higher and higher to the performance requirement for circuit protecting switch
Reliability is the main direction of development of air-break at this stage.Contact and arc quenching system are the important components of breaker,
Contact shape and size design in contact system is very crucial, is directly related to the electrical endurance and breaking capacity of breaker.
Meanwhile as new energy is grown rapidly, direct current power system has also obtained significant progress.And existing common frame
Frame breaker is mainly used in AC electric power systems, and the frame circuit breaker for DC power system is less.Due to direct current system
The opposite AC system of system does not have natural zero crossing phenomenon, cannot be extinguished using the moment of alternating current zero passage as exchange
Electric arc can only rely on rapid elongation and cooling electric arc, and it is more than supply voltage to make arc voltage, then by arc extinction, so putting out
Arc is more difficult.Therefore the extinguishing of direct-current arc is very difficult.Chinese patent ZL201621171400.X discloses a kind of direct current
Breaker of plastic casing arc quenching system, including static contact, and the arc-chutes and arc-extinguish chamber that are arranged on static contact, the arc extinguishing
Room includes the arc extinguishing grid pieces for two pieces of flash barriers being arranged on static contact, and be disposed in an evenly spaced relation between two pieces of flash barriers, institute
The arc-extinguish chamber stated includes two pieces of sidings at the interval being tightly disposed on static contact, and one end of two pieces of sidings is also against described
Arc extinguishing grid pieces so that arc-extinguish chamber, arc-chutes and static contact three cooperatively form the gas chamber of a relative closure, dynamic in breaker
Contact is i.e. in the gas indoor sport.The direct current breaker of plastic casing solves the problems, such as that low current blow-out is difficult, and improves it
The ability etc. of short circuit breaking.But the electric arc that the breaker generates can not extinguish completely, being easy spilling arc-chutes makes breaker
With generation security risk.
Invention content
The purpose of the present invention quenchless technical barrier of the electric arc in straight-flow system aiming at existing frame circuit breaker,
A kind of contact arc-extinguishing system of breaker is provided, arc-chutes are enhanced by the improvement to contact of breaker arc quenching system structure
Arc extinction ability, it is ensured that the electrical endurance and breaking capacity of frame circuit breaker reach relevant criterion requirement.
Technical solution
In order to achieve the above technical purposes, the present invention devises a kind of contact arc-extinguishing system of breaker, it includes arc extinguishing
Room and contact system, the contact system include movable contact system and static contact system, the movable contact system and static contact system
The engagement or disjunction of system control the break-make of breaker circuit, it is characterised in that：The static contact system includes static contact panel, described
The front end of static contact panel is equipped with arc leading angle, and the arc leading angle is trapezoidal dovetail shaped, and the arc extinguishing grid pieces group of the arc-chutes is in " 3 " word
Shape.
Further, the static contact panel is equipped with preceding quiet silver point, and the rear end of the arc leading angle is concordant with the preceding quiet silver point, institute
The width for stating arc leading angle becomes larger the side of quiet silver point before being laterally away from positioned at preceding quiet silver point one.
Further, the arc-chutes include left clapboard and right clapboard, arc extinguishing grid pieces group both ends be inserted into respectively it is described it is left every
On plate and right clapboard, the arc extinguishing grid pieces group includes several arc extinguishing grid pieces, is equidistantly arranged between several arc extinguishing grid pieces, institute
The horizontal distance for stating several arc extinguishing grid pieces and the preceding quiet silver point gradually becomes remote since arc extinguishing grid pieces group bottom is upwards, then arrives
Gradually become close in the middle part of arc extinguishing grid pieces groups, then becomes upwards and gradually remote in the middle part of arc extinguishing grid pieces group, finally arrive arc extinguishing grid pieces group top
It is in the figure of three that striking grid in portion's, which gradually becomes closely,.
Advantageous effect
The contact arc-extinguishing system of a kind of breaker provided by the invention, by changing to contact of breaker arc quenching system structure
Into enhancing the arc extinction ability of arc-chutes, it is ensured that frame circuit breaker electrical endurance and breaking capacity in straight-flow system
Reach relevant criterion requirement.Meanwhile AC system is also can apply to by putting into practice the breaker, it equally can also meet quick extinguishing
The requirement of electric arc.
Description of the drawings
Attached drawing 1a is the product schematic diagram of arc quenching system in the embodiment of the present invention.
Attached drawing 1b is the product structure schematic diagram of arc quenching system in the embodiment of the present invention.
Attached drawing 2 is the decomposition texture schematic diagram of arc quenching system in the embodiment of the present invention.
Attached drawing 3 is that contact system is located at positional structure schematic diagram in arc-chutes in the embodiment of the present invention.
Attached drawing 4 is contact system structure schematic diagram during the present invention is implemented.
Attached drawing 5 is long moving contact component structural schematic diagram during the present invention is implemented.
Attached drawing 6 is short moving contact component structural schematic diagram during the present invention is implemented.
Attached drawing 7 is arc-chutes internal structure schematic diagram during the present invention is implemented.
Attached drawing 8 is arc chute chip architecture schematic diagram in the embodiment of the present invention.
Attached drawing 9 is top arc chute chip architecture schematic diagram in the embodiment of the present invention.
Attached drawing 10 is striking grid structural schematic diagram in the embodiment of the present invention.
Attached drawing 11 is arc leading angle structural schematic diagram in the embodiment of the present invention.
Attached drawing 12 is contact system engaging process structural schematic diagram in the embodiment of the present invention.
Attached drawing 13 is contact system breaking course structural schematic diagram in the embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is described in further details.
Embodiment
As shown in attached drawing 1a, 1b and 2, a kind of arc quenching system of breaker, it includes arc-chutes 1 and contact system 2, described
Contact system 2 includes movable contact system 201 and static contact system 202, the movable contact system 201 and static contact system 202
Engagement or disjunction control the break-make of breaker circuit, wherein：
As shown in Fig. 4, the movable contact system 201 includes long moving contact component 201a, the long moving contact component
The both sides 201a are arranged symmetrically short moving contact component 201b side by side, and the long moving contact component 201a is than the short moving contact component
201b long, the long moving contact component 201a and short moving contact component 201b can be rotated around same rotation center, such as 5 institute of attached drawing
Show, it is front and back on the long moving contact component 201a to be equipped with preceding length successively and move silver point 201a01 and rear long dynamic silver point 201a02, it is such as attached
Shown in Fig. 6, the short moving contact component 201b is equipped with short dynamic silver point 201b01, long after described to move silver point 201a02 and short dynamic silver
Point 201b01 is located at same level, long dynamic silver point 201a02 and short dynamic silver point after long dynamic silver point 201a01 is located at before described
Above 201b01；
As shown in attached drawing 2,3 and 4, the static contact system 202 includes static contact panel 202a, and the static contact panel 202a is equipped with
Preceding quiet silver point 202a01 and rear quiet silver point 202a02, the preceding quiet silver point 202a01 are corresponding with the dynamic silver point 201a01 of the preceding length,
Quiet silver point 202a02 is corresponding with rear long dynamic silver point 201a02 and short dynamic silver point 201b01 after described；As shown in Fig. 3, described preceding quiet
Silver point 202a01 moves silver point 201a01 with the preceding length and is located inside arc quenching system 1, the rear quiet silver point 202a02, rear long dynamic silver
Point 201a02 and short dynamic silver point 201b01 are located at outside arc-chutes 1；
It is the preceding long movable contact 201a01, rear long movable contact 201a02, short movable contact 201b01, preceding quiet in the present embodiment
Contact 202a01, rear stationary contact 202a02 respectively with corresponding long moving contact component 201a, short moving contact component 201b, static contact panel
202a is made of same or different material, and corresponding structure makes split type or integral type.
As shown in attached drawing 1a, 1b, 2 and 3, the arc-chutes 1 include left clapboard 101 and right clapboard 102, arc extinguishing grid pieces group
103 both ends are inserted into respectively on the left clapboard 101 and right clapboard 102, as shown in attached drawing 7,8 and 9, the arc extinguishing grid pieces group
103 upper ends are equipped with top arc extinguishing grid pieces 104, and the both ends of the top arc extinguishing grid pieces 104 are inserted into the left clapboard 101 and right clapboard
On 102,104 top of the top arc extinguishing grid pieces is equipped with striking grid 105, and the striking grid 105 is inserted into the left clapboard 101
On right clapboard 102, foot 103a01 is stretched out in 103 front end both sides of the arc extinguishing grid pieces group, and aerogenesis cover 106 is coated with foot
103a01 is located at 104 lower section of the top arc extinguishing grid pieces, and the preceding quiet silver point 202a01 moves silver point 201a01 with the preceding length and is located at
In the spark chamber room that the left clapboard 101, right clapboard 102, arc extinguishing grid pieces group 103 and aerogenesis cover 106 are formed.The arc extinguishing grid pieces
Group 103 includes several arc extinguishing grid pieces 103a, is equidistantly arranged between several arc extinguishing grid pieces 103a, several arc extinguishing grid pieces
The horizontal distance of the 103a and preceding quiet silver point 202a01 gradually becomes remote since 103 bottom of arc extinguishing grid pieces group is upwards, then arrives
The middle part of arc extinguishing grid pieces group 103 gradually becomes close, then becomes upwards and gradually remote from 103 middle part of arc extinguishing grid pieces group, finally arrives arc-chute
It is in the figure of three that 103 top striking grid 105 of piece group, which gradually becomes closely,.106 inner cavity of aerogenesis cover is and the arc extinguishing grid pieces group
The 103 corresponding figure of three.In particular, be exactly that arc extinguishing grid pieces group 103 is total in the present embodiment including 18 arc extinguishing grid pieces 103a
It is bottom-up equally to arrange；Bottom-up 1st of 18 arc extinguishing grid pieces 103a are to quiet silver point 202a01 water before the 11st pitch of fins
Square to distance gradually become remote by closely；Distances of the 12nd and 13 arc extinguishing grid pieces 103a away from preceding quiet silver point 202a01 horizontal directions
Become again close；Distances of 14th to the 18 arc extinguishing grid pieces 103a away from preceding quiet silver point 202a01 horizontal directions gradually becomes remote by closely again；
Distance of the striking grid 105 away from preceding quiet silver point 202a01 horizontal directions becomes close again.
As shown in Fig. 10, the arc end 105a of the striking grid 105 is three downward bending structures.Such as attached drawing 2,3
Shown in 4, the contact end 201a03 of the long moving contact component 201a is in upper hook shape protrusion, the long moving contact component 201a
The outer profile of hook protrusion contact end 201a03 be triangular shaped, and front end wedge angle is obtuse angle, and wedge angle point is located at triangle
Middle and lower part position, the contact end 201b02 of the short moving contact component 201b is hook protrusion, the short moving contact component
The outer profile of the hook protrusion contact end 201b02 of 201b is arc-shaped.The movable contact system 201 and the static contact system
When 202 disjunction, between the arc end 105a of the striking grid 105 and the contact end 201a03 of the long moving contact component 201a
The current path of M shapes can be formed.The structure of tri- bendings of arc end 105a will greatly reinforce electric field strength herein, will be more advantageous
In electric arc is led to 1 top of arc-chutes, the length of elongating arc improves arc voltage, will greatly improve breaking capacity.
Meanwhile as shown in Fig. 4, the front end of the static contact panel 202a is located at the front of preceding quiet silver point 202a01 equipped with striking
Angle 202a03, the rear end of the arc leading angle 202a03 is concordant with the preceding quiet silver point 202a01, as shown in Fig. 11, the striking
Angle 202a03 is trapezoidal dovetail shaped, and the width of the arc leading angle 202a03 is quiet before being laterally away from positioned at preceding quiet silver point 202,a01 mono-
The side of silver point 202a01 becomes larger.The electromagnetism at the ends quiet silver point 202a01 before trapezoidal swallow-tailed arc leading angle 202a03 will be increased
Quiet silver point 202a01 of more advantageous electric arc the past is transferred out by field intensity, and at the same time, the arc extinguishing grid pieces group 103 of 3 fonts also will
The transfer of the enhancing electric arc of magnetic field intensity acceleration herein, leads to rapidly 103 bottom of arc extinguishing grid pieces group by electric arc arc root and shifts to arc extinguishing
1 rear end of room helps elongating arc length and improves arc voltage, improves breaking arc ability.
As shown in Fig. 12, in 202 engaging process of the movable contact system 201 and the static contact system, before described
Between quiet silver point 202a01 and the dynamic silver point 201a01 of the preceding length silver point is moved prior to the rear quiet silver point 202a02 and the rear length
It is contacted between 201a02 and short dynamic silver point 201b01；
As shown in Fig. 13, in 202 breaking course of the movable contact system 201 and the static contact system, before described
Quiet silver point 202a02 moves silver point with the rear length after described after between quiet silver point 202a01 and the dynamic silver point 201a01 of the preceding length
Disjunction between 201a02 and short dynamic silver point 201b01.
After being moved between silver point 201a01 due to the preceding quiet silver point 202a01 and the preceding length after described quiet silver point
202a02 and the rear long dynamic disjunction between silver point 201a02 and short dynamic silver point 201b01, therefore electric arc only will appear in preceding quiet silver
Point 202a01 and the preceding length are moved between silver point 201a01.Under air dielectric, preceding quiet silver point 202a01 moves silver point with preceding length
201a01 disjunction moments, contact position resistance and temperature are continuously increased, when temperature reaches contact material fusion temperature, contact point
Place forms the metal bridge of fusing metal, and the dynamic silver point 201a01 of preceding length, which continues to disconnect, can break metal bridge and generate electric arc, starting point
Combustion electric arc is the metal vapors for moving silver point 201a01 with preceding length by preceding quiet silver point 202a01, then after electric arc is elongated, week
It encloses air dielectric and steps into arc gap and metallic phase arc is changed by the gaseous phase arc of free support.Gaseous phase arc is by preceding quiet
Silver point 202a01 moves silver point 201a01 with preceding length and constantly elongates, while arc extinguishing grid pieces group 103, aerogenesis cover 106 are total in arc-chutes 1
Reach final extinguishing under same-action.The present invention realizes quiet silver point 202a01 before electric arc only results from and moves silver point with the preceding length
Between 201a01, i.e., electric arc directly results from inside arc-chutes 1, eliminates electric arc and is transferred to internal procedure outside arc-chutes 1；
Meanwhile result from the electric arc inside arc-chutes 1, arc extinguishing grid pieces group 103, aerogenesis cover 106 formed narrow meet will more in space
Effective compression and cooling electric arc increase arc resistance and improve arc voltage, and final realize extinguishes electric arc faster.
The contact arc-extinguishing system of a kind of breaker provided by the invention, by changing to contact of breaker arc quenching system structure
Into enhancing the arc extinction ability of arc-chutes, it is ensured that frame circuit breaker electrical endurance and breaking capacity in straight-flow system
Reach relevant criterion requirement.Meanwhile AC system is also can apply to by putting into practice the breaker, it equally can also meet quick extinguishing
The requirement of electric arc.
Structure, ratio, size etc. depicted in the embodiment of the present invention institute accompanying drawings, only coordinating specification to be taken off
The content shown is not limited to the enforceable qualifications of the present invention so that those skilled in the art understands and reads, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the present invention
Under the effect of can be generated and the purpose that can reach, it should all still fall and obtain the model that can cover in disclosed technology contents
In enclosing.Meanwhile cited such as "upper", "lower", "left", "right", " centre ", " clockwise ", " counterclockwise " in this specification
Term, be merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or
Adjustment, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
Claims (3)
1. a kind of contact arc-extinguishing system of breaker, it includes arc-chutes (1) and contact system (2), contact system (2) packet
Include movable contact system (201) and static contact system (202), the engagement of the movable contact system (201) and static contact system (202)
Or disjunction controls the break-make of breaker circuit, it is characterised in that：The static contact system (202) includes static contact panel (202a),
The front end of the static contact panel (202a) is equipped with arc leading angle (202a03), and the arc leading angle (202a03) is trapezoidal dovetail shaped, described
The arc extinguishing grid pieces group (103) of arc-chutes (1) is in the figure of three.
2. a kind of contact arc-extinguishing system of breaker as described in claim 1, it is characterised in that：On the static contact panel (202a)
Equipped with preceding quiet silver point (202a01), the rear end of the arc leading angle (202a03) is concordant with preceding quiet silver point (202a01), described
The width of arc leading angle (202a03) from positioned at preceding quiet silver point (202a01) one be laterally away from before quiet silver point (202a01) side by
Gradual change is big.
3. a kind of contact arc-extinguishing system of breaker as described in claim 1, it is characterised in that：The arc-chutes (1) include
Left clapboard (101) and right clapboard (102), arc extinguishing grid pieces group (103) both ends are inserted into the left clapboard (101) and right clapboard respectively
(102) on, the arc extinguishing grid pieces group (103) includes several arc extinguishing grid pieces (103a), between several arc extinguishing grid pieces (103a)
Equidistantly arrangement, the horizontal distance of several arc extinguishing grid pieces (103a) and the preceding quiet silver point (202a01) is from arc extinguishing grid pieces group
(103) bottom starts gradually to become remote upwards, then arrives in the middle part of arc extinguishing grid pieces group (103) and gradually becomes close, then from arc extinguishing grid pieces group
(103) middle part is upward and gradually becomes remote, and it is closely in " 3 " word finally to arrive gradual become of striking grid 105 at the top of arc extinguishing grid pieces group (103)
Shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810362518.8A CN108538687A (en) | 2018-04-20 | 2018-04-20 | A kind of contact arc-extinguishing system of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810362518.8A CN108538687A (en) | 2018-04-20 | 2018-04-20 | A kind of contact arc-extinguishing system of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108538687A true CN108538687A (en) | 2018-09-14 |
Family
ID=63478112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810362518.8A Pending CN108538687A (en) | 2018-04-20 | 2018-04-20 | A kind of contact arc-extinguishing system of breaker |
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| Country | Link |
|---|---|
| CN (1) | CN108538687A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341614A (en) * | 2018-12-18 | 2020-06-26 | 上海良信电器股份有限公司 | Contact system of low-voltage circuit breaker |
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| CN106971928A (en) * | 2017-05-18 | 2017-07-21 | 北京北元电器有限公司 | Arc extinguishing structure and breaker of plastic casing applied to breaker of plastic casing |
| CN206363921U (en) * | 2017-01-06 | 2017-07-28 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of breaker |
| CN206921774U (en) * | 2017-04-05 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of contact of breaker arc quenching system structure-improved |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN208422816U (en) * | 2018-04-20 | 2019-01-22 | 上海良信电器股份有限公司 | A kind of contact arc-extinguishing system of breaker |
-
2018
- 2018-04-20 CN CN201810362518.8A patent/CN108538687A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206363921U (en) * | 2017-01-06 | 2017-07-28 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of breaker |
| CN206921774U (en) * | 2017-04-05 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of contact of breaker arc quenching system structure-improved |
| CN106971928A (en) * | 2017-05-18 | 2017-07-21 | 北京北元电器有限公司 | Arc extinguishing structure and breaker of plastic casing applied to breaker of plastic casing |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN208422816U (en) * | 2018-04-20 | 2019-01-22 | 上海良信电器股份有限公司 | A kind of contact arc-extinguishing system of breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341614A (en) * | 2018-12-18 | 2020-06-26 | 上海良信电器股份有限公司 | Contact system of low-voltage circuit breaker |
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