CN103021749B - Circuit breaker capable of quickly releasing - Google Patents
Circuit breaker capable of quickly releasing Download PDFInfo
- Publication number
- CN103021749B CN103021749B CN201210581974.4A CN201210581974A CN103021749B CN 103021749 B CN103021749 B CN 103021749B CN 201210581974 A CN201210581974 A CN 201210581974A CN 103021749 B CN103021749 B CN 103021749B
- Authority
- CN
- China
- Prior art keywords
- moving contact
- piece
- guide rod
- unlock piece
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a circuit breaker capable of quickly releasing and belongs to the technical field of low-voltage electrical appliances. The circuit breaker comprises a shell, a movable contact component, a fixed contact component, a handle knob component and a middle connection rod, the movable contact component and the fixed contact component are contained in the shell, the handle knob component is pivoted on the shell, the middle connection rod is connected between the handle knob component and the movable contact component, the movable contact component comprises a movable contact supporting part pivoted on the shell, a locking fastener pivoted on the movable contact supporting part, an unlocking part pivoted on the movable contact supporting part and a movable contact guide rod pivoted on the movable contact supporting part or the shell, and the locking fastener and the unlocking part are mutually buckled to form mechanical connection. The circuit breaker is characterized in that an unlocking part actuating flange matched with the unlocking part and used for actuating the unlocking part to move is formed by extending at a position corresponding to the unlocking part and on the movable contact guide rod. The circuit breaker capable of quickly releasing has the advantages of quickness in releasing, simple structure, conduciveness to manufacturing and assembly and high economical efficiency.
Description
Technical field
the invention belongs to low voltage electrical apparatus technology field, be specifically related to a kind of circuit-breaker of rapid-releasing.
Background technology
the automatic dropout technology of low-voltage circuit breaker, can automatically make circuit breaker tripping trip when being mainly used in overload or short trouble generation, thus the load protected low voltage power distribution network and be connected with circuit breaker.Automatic release device for overload fault protection is generally thermal overload release; main element is thermo-responsive bimetal leaf; and be generally magnetic release for the automatic release device of short trouble protection; comprising solenoid electromagnet and beating type electromagnet, also having the trip gear of the electronic type of the defencive function for customizing more horn of plenty in addition.
especially, for the current-limiting type circuit-breaker under Short-Circuit High Current fault, owing to applying the above-mentioned automatic dropout technology enumerated, have to pass through current detecting, element activates and operating mechanism responds action links, thus response of threading off is longer for operate time, be difficult to meet the requirement of circuit breaker to the high breaking capacity of short circuit and quick breaking capacity, need a kind of dropout technology automatically faster to meet the requirement of the higher current limiting capacity of circuit breaker, Research of Current Limiting Circuit Breaker can meet this requirement.Research of Current Limiting Circuit Breaker is scolded fast to come by electrodynamic repulsion force effect under Short-Circuit High Current mainly through moving contact and is realized strong current limliting, and after moving contact is scolded out, electric arc produces fast and elongates between dynamic/static contact, and electric arc enters arc extinguishing grid pieces fast and extinguishes.But, also there is unfavorable factor in Research of Current Limiting Circuit Breaker, specifically: if trip gear responds slow motion after moving contact is scolded out, operating mechanism has little time trip action, then once moving contact falling contacts again with fixed contact, the danger of secondary arcing can be caused thus cause disjunction failure.Therefore, moving contact scold start work while operating mechanism can quick release be the effect comparing expectation.
chinese invention patent application publication number CN101061561A(application number: the automatic circuit breaker 200580039350.8) recommending a kind of tripgear with armature contact actuating, unlocked by mechanical drive train actuating operations mechanism after moving contact is scolded out, thus realize automatic trip action.The dropout process of this patent formula scolds out Movement transmit to trip shaft moving contact by the drive link (patent claims slide bar) between moving contact and trip shaft, and then make operating mechanism trip action by trip shaft, drives moving contact to have threaded off breaking operation.Should say, this patent formula compensate for the shortcoming existing for US Patent No. 5103198 and US4644307, embody Instructions Page 3 12-16 capable described in technique effect, obtain quick and accurate circuit breaker response.
but, because above-mentioned patent application scheme exists, transmission link is many can not reach gratifying shortcoming with action stability, therefore, to compare with the traditional approach that sensed current signal activates operate time with response and not there is advantage, and, driving-chain and drive connection complexity are also attended by regular hour delay, and, owing to employing drive link, thus manufacture and assembling link are increased, and certain impact is produced on the cost control of industrialized mass production, certainly, if save any transition member and directly unlocked by the operating mechanism of moving contact actuate circuit breaker when moving contact is scolded out relative to fixed contact, then aforesaid shortcoming all can be eliminated, but, being showed no in published patent and non-patent literature allly has corresponding technology to enlighten, and do not hear the report having industry to succeed, to this, the applicant has done positive trial, and it is highly effective for being demonstrated experimentally, the technical scheme that will propose below produces in this context.
Summary of the invention
task of the present invention is the circuit-breaker providing a kind of rapid-releasing, when there is Short-Circuit High Current in circuit, moving contact guide rod relative to static contact component scold out can directly actuating operations mechanism unlock piece unlock and use reduce transmission link, improve trip speed, both be conducive to avoiding moving contact to fall after rise contact with fixed contact generation secondary and cause disjunction failure, contribute to simplified structure again, convenient manufacture and assembling are to embody economy.
task of the present invention has been come like this, a kind of circuit-breaker of rapid-releasing, comprise shell, be installed with moving contact component in the enclosure, be installed with matching with moving contact component and the static contact component that realizing circuit is switched on or switched off in the enclosure equally, handle knob assembly and intermediate connecting rod, handle knob assembly pivot is arranged on shell, intermediate connecting rod is connected between handle knob assembly and moving contact component, moving contact component comprises pivot and is arranged on moving contact strutting piece on shell, pivot is arranged on the snap close piece on moving contact strutting piece, pivot is arranged on the unlock piece on moving contact strutting piece and pivot is arranged on moving contact strutting piece or pivot is arranged on moving contact guide rod on shell, wherein, described snap close piece and described unlock piece each other hasp are formed and are mechanically connected, it is characterized in that: extend on described moving contact guide rod and at the position corresponding to described unlock piece be configured with one match with unlock piece activate bead for the unlock piece activating unlock piece action.
described unlock piece is configured with a concave panel, and this concave panel is corresponding with the movement locus of described moving contact guide rod, and described unlock piece activates bead and matches with concave panel.
moving contact is fixed with at the end of described moving contact guide rod, described static contact component comprises fixed contact guide rod and fixed contact, fixed contact is fixed on fixed contact guide rod, and it is corresponding with described moving contact, when described unlock piece activate bead to contact with described unlock piece coordinate time, air line distance>=1 ㎜ between described fixed contact to moving contact present position.
technical scheme provided by the invention due on moving contact guide rod and correspond to the position of unlock piece extend match with unlock piece activate bead for the unlock piece activating unlock piece action, thus when moving contact guide rod is scolded out relative to static contact component, activate bead by unlock piece and directly activate unlock piece, mechanical connection between unlock piece and snap close piece is disconnected, not only trip speed is fast, and structure is simple, is conducive to manufacturing and assembling, there is good economy.
Accompanying drawing explanation
fig. 1 is circuit-breaker on-state schematic diagram of the present invention.
fig. 2 is that circuit-breaker contact of the present invention scolds out actuating to unlock schematic diagram.
fig. 3 is circuit-breaker trip status schematic diagram of the present invention.
fig. 4 is circuit-breaker open mode schematic diagram of the present invention.
fig. 5 is the cutaway view of Fig. 1.
fig. 6 is the cutaway view of Fig. 2.
fig. 7 is the structural representation of unlock piece.
fig. 8 is the side diagram of Fig. 7.
fig. 9 is the structural representation of the moving contact component of circuit-breaker of the present invention.
figure 10 is the decomposing schematic representation of circuit-breaker of the present invention.
Embodiment
ask for an interview Fig. 1 to Figure 10.The circuit-breaker of rapid-releasing of the present invention comprises: shell, be installed with moving contact component in the enclosure and be installed with equally in the enclosure match with moving contact component the static contact component (static contact component comprises fixed contact 8 and fixed contact guide rod 9) that realizing circuit connects or disconnects, and comprise handle knob assembly 1, intermediate connecting rod 2 and thermo magnetic trip release unit etc.Handle knob assembly 1 pivot is arranged on shell, and namely pivot is arranged in the first counterbore 103 as shown in Figure 10, and intermediate connecting rod 2 is connected between handle knob assembly 1 and moving contact component.Being provided with not shown between described handle knob assembly 1 and shell is known returning spring, by returning spring for handle knob assembly 1 provides the actuating force of instruction disjunction position automatically.
moving contact component comprises moving contact strutting piece 3, snap close piece 4, unlock piece 5, moving contact guide rod 6 and moving contact 7, wherein snap close piece 4 and the hub setting of unlock piece 5 difference are on moving contact strutting piece 3, namely moving contact strutting piece 3 is arranged in (as follows) second counterbore 102 on shell (Figure 10 shows) rotationally by axle 36 hub setting, be provided with disjunction main spring 31 between moving contact strutting piece 3 and shell, when breaking operation, disjunction main spring releases energy and makes the quick disjunction of moving contact component; Moving contact guide rod 6 by the 3rd axle 35 hub setting in the 3rd counterbore 101 of shell (Figure 10 shows), touch spring 65 is provided with between moving contact guide rod 6 and moving contact strutting piece 3, moving contact 7 when being provided in closure state by touch spring 65 and contact force stable between fixed contact 8, moving contact guide rod 6 has the first contact-making surface 64, under the effect of touch spring 65 pretightning force, this first contact-making surface 64 contacts with the stop surface 37 of moving contact strutting piece 3 and places restrictions on.The fixed contact 8 that aforesaid static contact component comprises fixed contact guide rod 9 and is fixed on fixed contact guide rod 9, fixed contact 8 is corresponding with moving contact 7.
moving contact strutting piece 3 and moving contact guide rod 6 are not limited to above-mentioned pivoting form, and both moving contact strutting piece 3 and moving contact guide rod 6 are hubbed on housing by same axis; In addition, also moving contact guide rod 6 can be hubbed on moving contact strutting piece 3, then the moving contact strutting piece 3 being pivoted with moving contact guide rod 6 is pivoted on housing by other axle.
described snap close piece 4 has the 4th counterbore 42, the 5th counterbore 43 and the first hasp portion 41, snap close piece 4 by hinged cooperation the between the 4th counterbore 42 and the first axle 32 that moving contact strutting piece 3 is arranged hub setting on moving contact strutting piece 3; Described unlock piece 5 has first, second, third effect end the 58,53,54, the 6th counterbore 55, second hasp portion 57, concave panel 56, locating shaft 52 and location hole 51, unlock piece 5 to be coordinated with the 7th counterbore 34 of moving contact strutting piece 3 by locating shaft 52 and location hole 51 coordinate (centre of gyration forming unlock piece 5) with the second axle 33 of moving contact strutting piece 3 and hub setting on moving contact strutting piece 3.And, aforesaid intermediate connecting rod 2 is connected between handle knob assembly 1 and moving contact component, one end of intermediate connecting rod 2 and handle knob assembly 1 pivot joint, the other end of intermediate connecting rod 2 is placed in the 5th counterbore 43 that moving contact component maincenter is placed in the snap close piece 4 of moving contact strutting piece 3 and coordinates pivot joint.
first effect end 58 of aforesaid unlock piece 5 makes circuit breaker tripping for the actuating of bearing magnetic trip unit; Second effect end 53 makes circuit breaker tripping for the actuating of bearing hot trip unit bimetal leaf heater element; 3rd effect end 54 is tested for the trip action of circuit breaker external, and operating personnel drive the 3rd effect end 54 to make unlock piece 5 make circuit breaker tripping around its centre of gyration pivotable by actuation trip testing button (not shown); 6th counterbore 55 is located for the installation of circuit breaker multipole STATEMENT OF FEDERALLY SPONSORED, and the unlock piece 5 of the interlock every pole of multipole circuit breaker, makes multipole circuit breaker trip action synchronously carry out; Second hasp portion 57 for the first hasp portion 41 hasp locking on snap close piece 4, form stable mechanical connection.
composition graphs 1 and Fig. 4 set forth the normal splitting or integrating operating process of circuit-breaker under circuit normality, described snap close piece 4 and unlock piece 5 be the diverse location of hub setting on moving contact strutting piece 3 respectively, forms mechanical connection when the second hasp portion 57 hasp of the first hasp portion 41 of snap close piece 4 and unlock piece 5.Thus, handle knob assembly 1, intermediate connecting rod 2 and moving contact component form quadric chain.By the driving to handle knob assembly 1, and then activated the moving contact strutting piece 3 of moving contact component by intermediate connecting rod 2, then drive moving contact guide rod 6 and moving contact 7 by moving contact strutting piece 3, then can joint weldment operation under completing circuit normality.
composition graphs 1, Fig. 3 and Fig. 4 set forth the course of work of circuit-breaker when overload or short trouble, closing of power circuit breaker state, there is overload or short trouble in circuit, detected and failure judgement electric current by heat or magnetic trip unit, send actuating signal, activate unlock piece 5 action (the first effect end 58 of hot trip unit actuating unlock piece 5 of moving contact component, magnetic trip unit activates the second effect end 53 of unlock piece 5), unlock piece 5 counterclockwise rotates along diagram around its centre of gyration, then the second hasp portion 57 disconnects the hasp backstop in the first hasp portion 41, snap close piece 4 is destroyed with the hasp blocking of unlock piece 5, previous mechanical connection disconnects, moving contact strutting piece 3 under the effect of disjunction main spring 31 and touch spring 65 around its pivot 36 along diagram counterclockwise quick rotation, and then, moving contact strutting piece 3 is by the contact action of the first contact-making surface 64 of its stop surface 37 pairs of moving contact guide rods 6, drive moving contact guide rod 6 and moving contact 7 action.Moment is disconnected at mechanical connection, moving contact component is by spring energy effect fast reaction, and handle knob assembly 1 and intermediate connecting rod 2 are after moving contact component quick acting, by under the back-moving spring (not shown) effect of handle knob assembly 1, homing action arrives and disconnects indicating positions, because the energy of handle back-moving spring is much little compared with the energy of disjunction main spring 31 and touch spring 65, therefore the homing action of handle knob assembly 1 is often later than moving contact component and arrives disjunction position (as shown in Figure 3), intermediate connecting rod 2 drives snap close piece 4 to reset further and arrives disjunction position.Here, because snap close piece 4 coordinates pivot joint by the 4th counterbore 42 with the first axle 32 on moving contact strutting piece 3, and, pivot joint is coordinated with intermediate connecting rod 2 by the 5th counterbore 43, therefore, during the action of dropout separating brake, snap close piece 4 one aspect drives quick acting switching-off action by moving contact strutting piece 3, inhibition on the other hand by intermediate connecting rod 2 has a motion sluggishness, thus, when the hasp blocking of snap close piece 4 with unlock piece 5 is destroyed (the hasp backstop of the second hasp portion 57 to the first hasp portion 41 disconnects), the servo-actuated contact supporter 3 of snap close piece 4 is together while synchronous axial system, snap close piece 4 is also with relative to the rotating of moving contact strutting piece 3 (around its first axle 32 on moving contact strutting piece 3).As shown in Figure 3, before snap close piece 4 resets, unlock piece 5 cannot reset by the block of snap close piece 4.As shown in Figure 4, breaker open operation state, moving contact component is in an open position, handle knob assembly 1 indicates separating brake open position under its back-moving spring (not shown) effect, drives intermediate connecting rod 2 and snap close piece 4 to reset, after snap close piece 4 resets, unlock piece 5 resets under its back-moving spring (not shown) effect, first hasp portion 41 of snap close piece 4 arrives hasp locked position of coupler again with the second hasp portion 57 of unlock piece 5, forms mechanical connection, reset of breaker.Now, as rotated to operating grip knob assembly 1 can carry out closing operation along diagram clockwise direction.
as the technical essential of technical scheme provided by the invention, moving contact guide rod 6 is convexly equipped with unlock piece and activates bead 61, unlock piece activates the position of bead 61 on moving contact guide rod 6 and corresponds to aforesaid unlock piece 5, more specifically correspond to aforesaid concave panel 56, because the concave panel 56 be formed on unlock piece 5 is corresponding with the movement locus of moving contact guide rod 6.
limit breaking course under Short-Circuit High Current action condition, as shown in Fig. 2, Fig. 3, Fig. 5 and Fig. 6, short circuit current I path such as the arrow of figure is illustrated, moving contact guide rod 6 and fixed contact guide rod 9 are just to setting, moving contact component bears electrodynamic repulsion force effect and is scolded out, and forms moving contact guide rod 6 by first disengaging movement of electrodynamic repulsion force effect away from static contact component.The process electric arc 10 that moving contact 7 is separated with fixed contact 8 produces and elongates gradually along with the increase electric arc 10 of both distances, and the existence of electric arc 10 makes short circuit current maintain to exist, and the continuous action of electrodynamic repulsion force makes moving contact guide rod 6 continue to be scolded out.After certain distance d scolded out by moving contact guide rod 6 (Fig. 6 shows), the unlock piece of moving contact guide rod 6 activates bead 61 and contacts with the concave panel 56 of unlock piece 5 and give unlock piece 5 one collision impacts, so unlock piece 5 around its centre of gyration (by locating shaft 52 and the 7th counterbore 34, second axle 33 is formed with location hole 51) counterclockwise rotate, hasp backstop when the first hasp portion 41 of the second 57 pairs of snap close pieces 4 in hasp portion of unlock piece 5 disconnects, stable hasp locking then between unlock piece 5 and snap close piece 4 is destroyed, mechanical connection disconnects, moving contact strutting piece 3 counterclockwise rotates along diagram under the effect of disjunction main spring 31 and touch spring 65, and then, moving contact strutting piece 3 is by the contact action of the first contact-making surface 64 of its stop surface 37 pairs of moving contact guide rods 6, drive moving contact guide rod 6 and moving contact 7 action, form the second disengaging movement away from static contact component that moving contact guide rod 6 drives by moving contact strutting piece 3, complete dropout breaking operation, handle knob assembly 1 and intermediate connecting rod 2 under the effect of the returning spring of handle knob assembly 1 to the action of disjunction indicating positions (the action details of each spare part of concrete trip action process sees above the description stating dropout breaking operation process).After this rapid-releasing mode can effectively prevent from electric arc 10 from shifting extinguishing, moving contact component falls after rise and to contact arcing again with static contact component secondary and cause disjunction unsuccessfully.Specifically, moving contact strutting piece 3 drives snap close piece 4 and unlock piece 5 counterclockwise to rotate along diagram around its pivot 36 under its disjunction main spring effect, moving contact guide rod 6 falling of moving contact component front wheel driving its formed away from the second disengaging movement of static contact component, complete the dropout breaking operation under Short-Circuit High Current effect.
as shown in Figure 7 to 9, the unlock piece on moving contact guide rod 6 activates bead 61 for boss formation.Concave panel 56 on unlock piece 5 is positioned on the movement locus of moving contact guide rod 6, the centre position of unlock piece 5 forms a spill cavity volume in the present embodiment, for connecting two parts of unlock piece 5, these two parts respectively have locating shaft 52 or location hole 51 hold with the 7th counterbore 34 on moving contact strutting piece 3 or the second axle 33 respectively to join and be articulated and connected (forming the centre of gyration of unlock piece 5 on moving contact strutting piece 3), thus ensureing that unlock piece 5 is connected with moving contact strutting piece 3 is stable, namely the surface of spill cavity volume is configured with concave panel 56.Moving contact guide rod 6 is scolded out by electrodynamic repulsion force effect, motion process is opened away from first of static contact component, unlock piece activates bead 61 and enters spill cavity volume and contact with curved surface bottom spill cavity volume i.e. concave panel 56, unlock piece 5 is driven to rotate around its centre of gyration on moving contact strutting piece 3, hasp locking between unlock piece 5 and snap close piece 4 is destroyed, mechanical connection disconnects, realize the action of circuit breaker tripping separating brake, thus form the second disengaging movement away from static contact component that moving contact strutting piece 3 drives moving contact guide rod 6.
under the architectural feature that circuit breaker is certain, when unlock piece activates bead 61 with concave panel 56 critical contact, the corresponding short circuit current threshold values of beeline d between dynamic and static contact 7,8, when short circuit current is greater than this threshold values, moving contact guide rod 6 can action and activate unlock piece 5 around its centre of gyration pivotable further, snap close piece 4 is destroyed with the hasp locking of unlock piece 5, and mechanical connection disconnects, and circuit breaker tripping action divides deenergizing.In the present embodiment, the shortest distance d between above-mentioned moving contact 7 and fixed contact 8 preferably >=1mm, further say, the maximum bouncing displacement amount of moving contact 7 during the operation of circuit breaker normal ON must be greater than, when circuit breaker normal ON can be avoided thus to operate, the spring of moving contact guide rod 6 causes unlock piece to activate bead false triggering concave panel 56, hasp locking between unlock piece 5 and snap close piece 4 is disconnected and causes circuit breaker tripping action, and misoperation is in this case less desirable especially.
in sum, the circuit-breaker of rapid-releasing of the present invention is under Short-Circuit High Current effect, scold out fast thus the direct and contact activated rapid-releasing action of unlock piece 5 by electrodynamic repulsion force effect by adopting moving contact guide rod 6, decrease transmission link, decrease number of spare parts, significantly shorten and trigger the response time, automatic dropout fast response time, circuit breaker can realize dropout disjunction action the very first time after moving contact is scolded out, and greatly reduces moving contact guide rod 6 falling and contacts with fixed contact generation secondary and then cause the risk of disjunction failure.
Claims (2)
1.
a kind of circuit-breaker of rapid-releasing, comprise shell, be installed with moving contact component in the enclosure, be installed with matching with moving contact component and the static contact component that realizing circuit is switched on or switched off in the enclosure equally, handle knob assembly (1) and intermediate connecting rod (2), handle knob assembly (1) pivot is arranged on shell, intermediate connecting rod (2) is connected between handle knob assembly (1) and moving contact component, moving contact component comprises pivot and is arranged on moving contact strutting piece (3) on shell, pivot is arranged on the snap close piece (4) on moving contact strutting piece (3), pivot is arranged on unlock piece (5) on moving contact strutting piece (3) and pivot and is arranged on the upper or pivot of moving contact strutting piece (3) and is arranged on moving contact guide rod (6) on shell, wherein, described snap close piece (4) and described unlock piece (5) each other hasp are formed and are mechanically connected, it is characterized in that: described moving contact guide rod (6) upper and extend at the position corresponding to described unlock piece (5) be configured with one match with unlock piece (5) activate bead (61) for the unlock piece activating unlock piece (5) action, described unlock piece (5) is configured with a concave panel (56), this concave panel (56) is corresponding with the movement locus of described moving contact guide rod (6), described unlock piece activates bead (61) and matches with concave panel (56).
2.
the circuit-breaker of rapid-releasing according to claim 1, it is characterized in that being fixed with moving contact (7) at the end of described moving contact guide rod (6), described static contact component comprises fixed contact guide rod (9) and fixed contact (8), fixed contact (8) is fixed on fixed contact guide rod (9), and it is corresponding with described moving contact (7), when described unlock piece activate bead (61) to contact with described unlock piece (5) coordinate time, air line distance>=1 ㎜ between described fixed contact (8) to moving contact (7) present position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581974.4A CN103021749B (en) | 2012-12-28 | 2012-12-28 | Circuit breaker capable of quickly releasing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581974.4A CN103021749B (en) | 2012-12-28 | 2012-12-28 | Circuit breaker capable of quickly releasing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103021749A CN103021749A (en) | 2013-04-03 |
| CN103021749B true CN103021749B (en) | 2015-01-07 |
Family
ID=47970237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210581974.4A Active CN103021749B (en) | 2012-12-28 | 2012-12-28 | Circuit breaker capable of quickly releasing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103021749B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197877B (en) * | 2013-08-19 | 2018-07-06 | 国家电网公司 | A kind of firm chalaza size measurement tool of breaker |
| CN104993323B (en) * | 2015-07-11 | 2017-07-28 | 曾肖锦 | The protection device of leakage protecting plug socket |
| CN108878229B (en) * | 2017-05-15 | 2024-02-27 | 上海良信电器股份有限公司 | Small-sized thermomagnetic release |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218920B1 (en) * | 1999-02-01 | 2001-04-17 | General Electric Company | Circuit breaker with adjustable magnetic trip unit |
| CN201054339Y (en) * | 2006-10-25 | 2008-04-30 | 浙江正泰电器股份有限公司 | Quick close-open low-voltage circuit breaker |
| CN101335161A (en) * | 2008-08-05 | 2008-12-31 | 无锡唯特电气技术有限公司 | Simple operation mechanism for circuit cutter |
| CN201570461U (en) * | 2009-06-18 | 2010-09-01 | 德力西电气（宁波）有限公司 | Quick-release breaker |
-
2012
- 2012-12-28 CN CN201210581974.4A patent/CN103021749B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6218920B1 (en) * | 1999-02-01 | 2001-04-17 | General Electric Company | Circuit breaker with adjustable magnetic trip unit |
| CN201054339Y (en) * | 2006-10-25 | 2008-04-30 | 浙江正泰电器股份有限公司 | Quick close-open low-voltage circuit breaker |
| CN101335161A (en) * | 2008-08-05 | 2008-12-31 | 无锡唯特电气技术有限公司 | Simple operation mechanism for circuit cutter |
| CN201570461U (en) * | 2009-06-18 | 2010-09-01 | 德力西电气（宁波）有限公司 | Quick-release breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103021749A (en) | 2013-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3171385B1 (en) | Operation device of multi-pole miniature circuit breaker | |
| JP5108122B2 (en) | Circuit breaker | |
| JP5074605B2 (en) | Movable contactor assembly of circuit breaker for current limiting type wiring | |
| WO2010139186A1 (en) | Quick trip breaker with function of pneumatic actuation trip | |
| JP2011091042A (en) | Circuit breaker for wiring with instantaneous tripping mechanism | |
| CN103021749B (en) | Circuit breaker capable of quickly releasing | |
| WO2020211585A1 (en) | Circuit breaker having n poles without arc extinguishing device | |
| CN201655694U (en) | Contact system with short circuit protection function | |
| CN100555507C (en) | Miniature circuit breaker | |
| CN207542173U (en) | Double breaking points small type circuit breaker operating mechanism | |
| CN110265273A (en) | A kind of miniature circuit breaker of superelevation short circuit breaking capacity | |
| CN201256130Y (en) | Improved circuit breaker | |
| CN217507187U (en) | Automatic trip type rotary isolating switch | |
| CN107275163B (en) | Circuit breaker and power distribution system | |
| CN102568948B (en) | Improved circuit breaker | |
| CN101587802B (en) | Rapid-releasing breaker | |
| CN201238017Y (en) | Simple operation mechanism of breaker | |
| CN113078035A (en) | High-breaking miniature circuit breaker | |
| CN101170031B (en) | Quick break low voltage circuit breaker | |
| CN207367828U (en) | A kind of high-breaking miniature breaker | |
| CN104601048A (en) | Operating mechanism of motor starter capable of performing quick breaking | |
| CN212750769U (en) | Circuit breaker operating device divide-shut brake interlocking device | |
| CN101527232B (en) | Contact actuating mechanism for switching device | |
| CN107946148A (en) | Double breaking points small type circuit breaker operating mechanism | |
| KR102453179B1 (en) | Manual Motor Starter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |