CN108962700A - A kind of shielding arc-control device between contact of breaker - Google Patents
A kind of shielding arc-control device between contact of breaker Download PDFInfo
- Publication number
- CN108962700A CN108962700A CN201810898441.6A CN201810898441A CN108962700A CN 108962700 A CN108962700 A CN 108962700A CN 201810898441 A CN201810898441 A CN 201810898441A CN 108962700 A CN108962700 A CN 108962700A
- Authority
- CN
- China
- Prior art keywords
- breaker
- lock
- hammerlock
- contact
- arc
- 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
- 238000004146 energy storage Methods 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 abstract description 9
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 101000581533 Homo sapiens Methylcrotonoyl-CoA carboxylase beta chain, mitochondrial Proteins 0.000 description 5
- 102100027320 Methylcrotonoyl-CoA carboxylase beta chain, mitochondrial Human genes 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A kind of shielding arc-control device between contact of breaker, including insulation board, turning handle, lock, tripping and connecting rod, one end of the turning handle and static contact are rotatablely connected and are equipped with energy storage torsional spring, and the insulation board is fixed on the other end of turning handle, and one end of insulation board is equipped with hammerlock；The lock and tripping are rotatablely connected with case for circuit breaker, lock is equipped with tapered end corresponding with the halfpace on hammerlock and principal solution hammerlock corresponding with actuating mechanism, reduction torsion spring is equipped between lock and case for circuit breaker, the tripping is equipped with master arm and slave arm, slave arm is corresponding with the hook on hammerlock, and the both ends of the connecting rod are rotatablely connected with master arm and operation handle respectively.The present invention is acted using energy storage torsional spring driving shielding arc-control device, the dynamic and static contact of breaker is isolated at the initial stage that electric arc generates, it forces electric arc to extinguish rapidly, limits the amplification of arc energy in this way, to improve the ability of breaker disjunction short circuit current and DC threshold load current.
Description
Technical field
When can effectively prevent breaker breaking current (including short circuit current) the present invention relates to one kind, dynamic and static contact it
Between generate the device of larger electric arc, belong to emergency protective device technical field.
Background technique
Miniature circuit breaker, moulded case circuit breaker (MCB, MCCB) be industry with it is important in civilian low-voltage distribution apparatus
Electric elements protect the overload and short trouble of distribution line mostly applied to the end of low-voltage distribution system or branch
And infrequently disjunction usually is carried out as switch.Wherein short trouble protection is its most important function, due to short trouble
When route short circuit current it is very big, it is very big that breaker can generate energy between its dynamic and static contact in disjunction short circuit current
Plasma arc (electric arc is conductive).In addition, in photovoltaic generating system or a variety of direct-flow distribution systems in application, except short circuit
Outside fault current, critical load current (although current value is little) is also not easy disjunction, only quick by certain technical measures
By arc extinction, breaker could complete the task of disjunction short circuit current or critical load current.
Currently, generated high temperature and high pressure electrical when MCB, MCCB are all made of arc-chutes technology to disjunction short circuit current both at home and abroad
Arc is cooled down and is extinguished, and the arc quenching principle of this technology is: when disjunction short circuit current, to generate electric arc between dynamic and static contact
And after elongation is accordingly amplified to certain length, energy, arc extinguishing is entered using magnetic field electro-dynamic force or other means driving high energy arc
Room makes to extinguish under the cooling effect of its metal grid in arc-chutes.The arc quenching effect of this method is by such as arc-chutes material
Material, contact cut-off the influences of the factors such as speed, clearance between open contacts, contact material, especially for the breaker of single-break structure,
The ability of disjunction short circuit current or DC threshold load current is poor, if it is desired to improving these performance parameters, manufacturing cost will
It greatly improves, and in the new energy such as tributaries such as photovoltaic DC system and rail traffic distribution system, direct-current short circuit electric current
Due to there is no the disjunction of zero passage process and its critical load current also extremely difficult, so that realizing these technical goal difficulty more
Greatly.
As the construction and generation of electricity by new energy and people of power distribution network especially DC distribution net are to electric network reliability requirement
Raising, need a kind of new breaker arc extinguishing method, objectively to greatly improve MCB, MCCB disjunction short circuit current or critical
The ability of load current, and realize product in the generalization of AC and DC field of power distribution.
Summary of the invention
It is an object of the invention to aiming at the disadvantages of the prior art, provide the shielding interrupter cartridge between a kind of contact of breaker
It sets, to improve the ability of breaker disjunction short circuit current and DC threshold load current.
Problem of the present invention is solved with following technical proposals:
A kind of shielding arc-control device between contact of breaker includes insulation board in composition, energy storage torsional spring, is located on case for circuit breaker
Sliding rail, turning handle, lock, tripping and connecting rod, the centre of gyration of the turning handle is equipped with shaft, and shaft support is in case for circuit breaker
On, energy storage torsional spring is additionally provided in shaft, the centre of gyration of the turning handle intersects with the vertical line where movable contact, stationary contact；Institute
State that insulation board is fixed on the other end of turning handle and gap between the dynamic and static contact of breaker is corresponding, one end of insulation board
Equipped with hammerlock；The lock and tripping are rotatablely connected with case for circuit breaker, and lock is equipped with corresponding with the halfpace on hammerlock
Tapered end and principal solution hammerlock corresponding with the actuating mechanism of breaker, between lock and case for circuit breaker be equipped with reset turn round
Spring, the tripping are equipped with master arm and slave arm, and the slave arm is corresponding with the hook on hammerlock, the both ends point of the connecting rod
It is not sequentially connected with the operation handle of the master arm of tripping and breaker.
Shielding arc-control device between above-mentioned contact of breaker is additionally provided with the magnetictrip top with breaker on the lock
The corresponding secondary unlocking arm of bar.
Shielding arc-control device between above-mentioned contact of breaker, the insulation board are equipped with sliding rail, and the sliding rail is arranged in open circuit
On device shell.
Shielding arc-control device between above-mentioned contact of breaker, the insulation board, turning handle and hammerlock constitute monoblock type insulation screen
Shield.
The present invention is acted using energy storage torsional spring driving shielding arc-control device, the initial stage that electric arc generates make breaker it is dynamic,
Static contact isolation, forces electric arc to extinguish rapidly, limits the amplification of arc energy in this way, realizes reliable point of breaker
It is disconnected, to improve the ability of breaker disjunction short circuit current and DC threshold load current.
Detailed description of the invention
Fig. 1 is overall structure diagram (non-screen when dynamic and static contact closes a floodgate of the shielding arc-control device between contact of breaker
Cover state)；
Fig. 2 is the shielding arc-control device schematic illustration (masked state when dynamic and static contact separating brake) between contact of breaker；
Fig. 3 is the partial enlarged view in Fig. 1；
Fig. 4 is dielectric shield schematic diagram；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is lock schematic diagram；
Fig. 7 is tripping schematic diagram.
Each label respectively indicates in figure are as follows: 1, case for circuit breaker；2, static contact；3, moving contact；4, dielectric shield；4-1,
Insulation board；4-2, turning handle；4-3, hammerlock；5, it latches；5-1, tapered end；5-2, principal solution hammerlock；5-3, secondary unlocking arm；6, tripping；6-
1, slave arm；6-2, master arm；7, connecting rod；8, operation handle；9, actuating mechanism；10, magnetictrip；10-1, electromagnetic trip
Device mandril；11, overlond trip element；12, arc-chutes；13, mechanism rod；14, tension spring；15, energy storage torsional spring；16, reduction torsion spring；
A, sliding rail；B, shaft；C, pivot pin；D, hook；E, axis；F, actuating mechanism hanging buckle point；G, halfpace；H, pin shaft.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
It should be evident that the accompanying drawings in the following description is the present invention in one of MCB embodiment, it is common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
The embodiment of the present invention is the shielding interrupter cartridge by spring power drive installed between the dynamic and static contact of MCB
It sets, when overload current, short-circuit current occurs in route, and when normal disjunction any load current value, shields arc-control device
It can be acted rapidly under energy-stored spring power drive, insulation screen is inserted between the static contact and moving contact of MCB (i.e. in figure
Insulation board 4-1), dynamic and static contact is reliably isolated by insulation screen, so that electric arc be made to extinguish at the initial stage of generation.
When MCB closes a floodgate again by operation handle, shielding arc extinguishing is pulled by operation handle and corresponding transmission mechanism
Device resets and makes energy-stored spring (the energy storage torsional spring 15 i.e. in figure) energy storage again, is prepared to enter into subsequent work circulation.
Referring to Fig. 1-Fig. 3, shield arc-control device mainly include dielectric shield 4, energy storage torsional spring 15, lock 5, reduction torsion spring 16,
Tripping 6, connecting rod 7, sliding rail A, shaft B and pivot pin C.Wherein, dielectric shield 4 is by insulation board 4-1, turning handle 4-2 and hammerlock 4-3 structure
At.
Dielectric shield 4 and energy storage torsional spring 15 are mounted on the lower section of static contact 2 by shaft B, and dielectric shield 4 is exhausted
It is just swung counterclockwise in the sliding rail A that listrium 4-1 can be arranged on case for circuit breaker 1, when swing is at the end counterclockwise, front end is inserted
Enter into the closed pockets of setting in front of sliding rail A, is limited when clockwise oscillation is at the end by sliding rail A.Lock 5 and reduction torsion spring 16
The right side of static contact 2 and the lower section of actuating mechanism 9 are mounted on by pivot pin C, on the right side of the tapered end 5-1 and hammerlock 4-3 on lock 5
Halfpace G is corresponding.
In MCB "on" position, dielectric shield 4 is in non-shielding state, and energy storage torsional spring 15 is in energy storage state, this
The halfpace G hanging buckle of the tapered end 5-1 and hammerlock 4-3 for being held against lock 5 of state are realized.When MCB due to circuit overload, short circuit or
When person realizes separating brake normal through 8 disjunction any load electric current of operation handle, actuating mechanism 9 and magnetictrip 10 can pass through
Magnetictrip mandril 10-1 triggering lock 5 overcomes its reduction torsion spring power counterclockwise, realizes lock 5 and dielectric shield 4
Rapid tripping, the counterclockwise under the effect of energy storage torsional spring 15 of dielectric shield 4, rapidly by the moving contact 3 opened simultaneously, quiet
Shielding isolation completely, achievees the purpose that extinguish electric arc and reliable disjunction rapidly between contact 2.
Wherein, operation handle 8 is rotated clockwise to open position under the action of therein torsional spring, while passing through connecting rod
7 push the master arm 6-2 of tripping 6, rotate clockwise tripping 6, the end slave arm 6-1 of tripping 6 reaches and the end hammerlock 4-3
The opposite position hook D (needing to have slight flexible deformation backward at the hook D of hammerlock 4-3 during this), be MCB next time
The reset of dielectric shield 4 is stirred when combined floodgate to be ready.
When separating brake, realize that the several method of shielding is as follows:
1. when MCB needs separating brake since overload current occurs in route, overlond trip element 11(bimetallic material is heated backward
The bending of low bulk plane materiel material direction) in overload current effect thermal flexure is issued, by the pull rod pulling action mechanism 9 on the left of it,
So that it is threaded off at actuating mechanism hanging buckle point F and lose stabilization, actuating mechanism 9 is under the action of tension spring 14, centered on axis E rapidly
It rotates clockwise, drives 3 separating brake of moving contact.
When actuating mechanism 9 rotates clockwise, the principal solution hammerlock 5-2 of its front end touching lock 5, makes lock 5 that reset be overcome to turn round
The halfpace G of the elastic force counterclockwise of spring 16, tapered end 5-1 and hammerlock 4-3 thread off, to make dielectric shield 4 in energy storage torsional spring
15 act on lower counterclockwise, realize shielding isolation processes completely；
2. the magnetictrip mandril 10-1 when MCB needs separating brake since short circuit current occurs in route, in magnetictrip 10
It is moved rapidly upward under electromagnetic field effect, pushes the secondary unlocking arm 5-3 of lock 5,5 counterclockwises of lock make tapered end 5-1
It threads off with the halfpace G of hammerlock 4-3, to make the counterclockwise under the effect of energy storage torsional spring 15 of dielectric shield 4, realizes screen completely
Cover isolation processes.
Buckle releaser mandril 10-1 pushes actuating mechanism 9 simultaneously and rotates clockwise, it is made to thread off at actuating mechanism hanging buckle point F
Stabilization is lost, actuating mechanism 9 is rotated clockwise rapidly centered on axis E under the action of tension spring 14, drives 3 separating brake of moving contact；
3. operation handle 8 rotates clockwise, and works as attended operation when MCB is normal through operation handle disjunction any load electric current
Mechanism rod 13 among handle 8 and actuating mechanism 9 is rotated clockwise in the junction of operation handle 8 has passed through operation handle 8
After the line of 9 supporting point of the centre of gyration and actuating mechanism, actuating mechanism 9 is suitable rapidly centered on axis E under the action of tension spring 14
Hour hands rotation, drives 3 separating brake of moving contact.
When actuating mechanism 9 rotates clockwise, the principal solution hammerlock 5-2 of its front end touching lock 5, makes lock 5 that reset be overcome to turn round
The halfpace G of the elastic force counterclockwise of spring 16, tapered end 5-1 and hammerlock 4-3 thread off, to make dielectric shield 4 in energy storage torsional spring
The lower rotation rapidly counterclockwise of 15 effects, realizes shielding isolation processes completely.
In MCB gate-dividing state, dielectric shield 4 is in masked state, and energy storage torsional spring 15 is in de-energized state.Work as MCB
When being closed a floodgate by operation handle 8, operation handle 8 passes through the active with tripping 6 while operational motion mechanism 9 completes to close a floodgate
The connecting rod 7 of arm 6-2 connection pulls tripping 6 using pin shaft H as center counterclockwise, the slave arm 6-1's and hammerlock 4-3 of tripping 6
Hook D overlap joint stirs dielectric shield 4 and rotates clockwise reset and energy storage, after the reset energy storage of dielectric shield 4 is stirred in tripping 6
Continuing a small amount of rotation makes the hook D of itself and hammerlock 4-3 break off relations, and shielding when completing MCB separating brake next time prepares.
The parts such as dielectric shield 4 and lock 5, tripping 6 are using high-intensitive, engineering plastic materials resistant to high temperature.It can guarantee
Technical requirements as defined in product standard.
It should be evident that method of the invention can be used for the breaker of diversified forms, as multiple structural forms MCB,
The products such as MCCB.
General Principle given by the present invention can use instead other without departing from the spirit or scope of the present invention
Embodiment is realized.
By shielding arc-suppressing method described herein after various forms of MCB, MCCB products applications, it can obtain as follows
Technological progress:
1. the ability of product disjunction AC and DC short-circuit current can be greatly improved；
2. the problem of can solve effective disjunction critical load current difficult (especially DC threshold load current)；
3. being further amplified for arc energy can be limited in disjunction short-circuit current, fly so as to shorten product outward
Arc distance from or realize zero arcing；
4. the amplification of arc energy when due to can effectively limit disjunction short-circuit current, to may make part original deisgn product
In not recyclable thermoset plastic material substitute (thermosetting plastics material with recyclable thermoplastic material
Expect that intensity is greater than thermoplastic material), meet the related request of environment protection field.
Claims (4)
1. the shielding arc-control device between a kind of contact of breaker, characterized in that include insulation board (4-1), turning handle (4- in composition
2) (5), tripping (6) and connecting rod (7), are latched, the centre of gyration of the turning handle (4-2) is equipped with shaft, and shaft support is in breaker
It on shell, is additionally provided in shaft energy storage torsional spring (15), the centre of gyration and movable contact of the turning handle (4-2), stationary contact place
Vertical line intersection；The insulation board (4-1) is fixed on the other end of turning handle (4-2) and between the dynamic and static contact of breaker
Gap is corresponding, and one end of insulation board (4-1) is equipped with hammerlock (4-3)；The lock (5) and tripping (6) are and case for circuit breaker
(1) be rotatablely connected, lock (5) be equipped with tapered end (5-1) corresponding with halfpace (G) on hammerlock (4-3) and with breaker
The corresponding principal solution hammerlock (5-2) of actuating mechanism (9) is equipped with reduction torsion spring between lock (5) and case for circuit breaker (1)
(16), the lock (6) is equipped with master arm (6-2) and slave arm (6-1), the card on the slave arm (6-1) and hammerlock (4-3)
Hook (D) it is corresponding, the both ends of the connecting rod (7) operation handle (8) with the master arm (6-2) of lock (6) and breaker respectively
Transmission connection.
2. the shielding arc-control device between contact of breaker according to claim 1, characterized in that on the lock (5) also
Equipped with secondary unlocking arm (5-3) corresponding with magnetictrip mandril (10-1) of breaker.
3. the shielding arc-control device between contact of breaker according to claim 1 or 2, characterized in that the insulation board (4-
1) it is equipped with corresponding sliding rail (A), the sliding rail (A) is fixed on case for circuit breaker (1).
4. the shielding arc-control device between contact of breaker according to claim 3, characterized in that the insulation board (4-1),
Turning handle (4-2) and hammerlock (4-3) constitute monoblock type dielectric shield (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898441.6A CN108962700A (en) | 2018-08-08 | 2018-08-08 | A kind of shielding arc-control device between contact of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898441.6A CN108962700A (en) | 2018-08-08 | 2018-08-08 | A kind of shielding arc-control device between contact of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108962700A true CN108962700A (en) | 2018-12-07 |
Family
ID=64468265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810898441.6A Pending CN108962700A (en) | 2018-08-08 | 2018-08-08 | A kind of shielding arc-control device between contact of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108962700A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586176A (en) * | 2018-12-20 | 2019-04-05 | 宁波美星机电有限公司 | A kind of high-voltage transforming cabinet away from ring arc blowing apparatus |
| CN110931327A (en) * | 2019-12-31 | 2020-03-27 | 邹耿彪 | Baffle arc control device and have baffle arc control device's circuit breaker |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484045A (en) * | 1982-08-16 | 1984-11-20 | General Electric Company | Molded case circuit breaker having improved arc resistant properties |
| CN102034652A (en) * | 2010-12-22 | 2011-04-27 | 上海良信电器股份有限公司 | Operating mechanism for molded case circuit breaker |
| CN104637744A (en) * | 2015-03-05 | 2015-05-20 | 台安科技(无锡)有限公司 | Quick tripping mechanism for short-circuit of miniature circuit breaker |
| CN107342199A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of case type shields arc-extinguishing mechanism |
| CN107359067A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of miniature circuit breaker with stronger arc extinguishing ability |
| CN207542173U (en) * | 2017-12-19 | 2018-06-26 | 上海永继电气股份有限公司 | Double breaking points small type circuit breaker operating mechanism |
| CN208806215U (en) * | 2018-08-08 | 2019-04-30 | 河北宝凯电气股份有限公司 | A kind of blow-out arc-control device applied to miniature circuit breaker |
-
2018
- 2018-08-08 CN CN201810898441.6A patent/CN108962700A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484045A (en) * | 1982-08-16 | 1984-11-20 | General Electric Company | Molded case circuit breaker having improved arc resistant properties |
| CN102034652A (en) * | 2010-12-22 | 2011-04-27 | 上海良信电器股份有限公司 | Operating mechanism for molded case circuit breaker |
| CN104637744A (en) * | 2015-03-05 | 2015-05-20 | 台安科技(无锡)有限公司 | Quick tripping mechanism for short-circuit of miniature circuit breaker |
| CN107342199A (en) * | 2017-08-23 | 2017-11-10 | 河北宝凯电气股份有限公司 | A kind of case type shields arc-extinguishing mechanism |
| CN107359067A (en) * | 2017-08-23 | 2017-11-17 | 河北宝凯电气股份有限公司 | A kind of miniature circuit breaker with stronger arc extinguishing ability |
| CN207542173U (en) * | 2017-12-19 | 2018-06-26 | 上海永继电气股份有限公司 | Double breaking points small type circuit breaker operating mechanism |
| CN208806215U (en) * | 2018-08-08 | 2019-04-30 | 河北宝凯电气股份有限公司 | A kind of blow-out arc-control device applied to miniature circuit breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586176A (en) * | 2018-12-20 | 2019-04-05 | 宁波美星机电有限公司 | A kind of high-voltage transforming cabinet away from ring arc blowing apparatus |
| CN110931327A (en) * | 2019-12-31 | 2020-03-27 | 邹耿彪 | Baffle arc control device and have baffle arc control device's circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4636760A (en) | Low voltage circuit breaker with remote switching function | |
| CN107359068B (en) | Moulded case circuit breaker with compound arc extinguishing performance | |
| CN101789332A (en) | Alternating current contactor with mechanical short circuit self-locking function | |
| CN108962700A (en) | A kind of shielding arc-control device between contact of breaker | |
| CN107342178B (en) | High-breaking miniature circuit breaker | |
| CN208806215U (en) | A kind of blow-out arc-control device applied to miniature circuit breaker | |
| CN104851760B (en) | The separation of the contact of Electromagnetic enhancement in circuit-breaker | |
| CN107393779B (en) | AC/DC universal circuit breaker with strong arc extinguishing effect | |
| CN109036992A (en) | A kind of shielding arc-suppressing method of breaker | |
| CN101630612B (en) | Main contact device of selective protective breaker | |
| CN107393780B (en) | Miniature circuit breaker with strong breaking capacity | |
| CN107527773B (en) | Universal circuit breaker with arc extinguishing performance | |
| CN207303018U (en) | A kind of omnipotent breaker | |
| CN207303016U (en) | A kind of miniature circuit breaker of strong breaking capacity | |
| CN205723423U (en) | A kind of Mobile vacuum load switch and fuse combined electric apparatus | |
| CN102243944A (en) | Double-breakpoint contact mechanism of low-voltage circuit breaker | |
| US3502834A (en) | Vacuum recloser having lightweight,rugged skeletal housing | |
| CN208690195U (en) | A kind of breaker with shielding arc-suppression function | |
| CN100435253C (en) | A high-speed double-break magnetic blowing middle-pressure great electric current direct current current-limiting circuit breaker | |
| US6717089B1 (en) | Electric pole for low-voltage power circuit breaker | |
| CN207947245U (en) | A kind of electromagnetic trip breaker | |
| CN107342196B (en) | Arc extinguishing device of high-breaking plastic casing type circuit breaker | |
| CN207367828U (en) | A kind of high-breaking miniature breaker | |
| CN107342197B (en) | Arc extinguishing device of sliding plate type circuit breaker | |
| CN207302929U (en) | A kind of breaker of plastic casing with compound arc extinction performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |