CN202816838U - Movable contact of low-voltage circuit breaker - Google Patents
Movable contact of low-voltage circuit breaker Download PDFInfo
- Publication number
- CN202816838U CN202816838U CN 201220376907 CN201220376907U CN202816838U CN 202816838 U CN202816838 U CN 202816838U CN 201220376907 CN201220376907 CN 201220376907 CN 201220376907 U CN201220376907 U CN 201220376907U CN 202816838 U CN202816838 U CN 202816838U
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- moving contact
- circuit breaker
- movable contact
- sheet
- voltage circuit
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Abstract
The utility model discloses a movable contact of a low-voltage circuit breaker. The movable contact comprises a parallel movable contact set, a parallel conductor, a movable contact bracket, fixing plates, a positioning plate, a conductive busbar and an arc-insulating cover. The parallel movable contact set comprises a plurality of movable contact sheets that are arranged and connected in parallel. Each movable contact sheet is formed by a conductor sheet and a silver contact in a welding manner. The lower ends of the movable contact sheets are connected to a flexible connection conductor. An insulating spacer is arranged between every two movable contact sheets. The parallel movable contact set is mounted on the movable contact bracket. The movable contact bracket has an accommodation cavity, which accommodates the conductor sheets on the movable contact sheets. The movable contact bracket is made of an insulating material. The two fixing plates are respectively mounted at two sides of the movable contact bracket. The positioning plate is disposed at the lower ends of the fixing plates. The conductive busbar is fixed on the positioning plate and is connected to the flexible connection conductor. The arc-insulating cover is arranged on the movable contact bracket and is located at the lower outer side of the silver contacts of the parallel movable contact set.
Description
Technical field
The utility model relates to Low Voltage Electrical Apparatus, more particularly, relates to a kind of moving contact of low-voltage circuit breaker.
Background technology
In distribution system, circuit breaker is as connection, disjunction and carrying rated operational current and the fault currents such as short circuit, overload.When overload, short circuit, lower voltage occuring in the circuit or disappear, the energy automatic shutdown circuit is protected reliably.
Along with social development, the construction of modernization industry and city building etc., to current class and the electric current of circuit breaker connect, the breaking capacity requirement is more and more higher, and is particularly higher to the requirement of the short circuit withstand capacity of the circuit breaker of large rated current such as omnipotent breaker.
Be provided with the next door in traditional movable contact system in the contact support cavity and be used for touch spring, moving contact sheet guiding.But because next door and contact support are integrated, and compressing by mould for thermosets, consider the thin especially of the impossible moulding of strength problem, so can not hold more moving contact sheet at existing contact support cavity, when the design contact system, do not consider the problem of electric power compensation simultaneously, such as the short circuit withstand capacity of need raising circuit breaker, utilize traditional contact system to be difficult to realize, so need the contact system of redesign circuit breaker.
When circuit breaker is worked in power distribution circuit, require the dynamic/static contact of circuit breaker to connect short circuit, the overload current of larger normal current.So moving contact of breaker needs certain end pressure to overcome the electrodynamic repulsion force that is produced by energising.The electric power of contact system is comprised of two parts, and the one, the loop electric power that the moving contact sheet is subject to, the loop electric power F that the i of moving contact blade unit is subject to
i=J
i* B
i, J
i, B
iBe respectively current density and magnetic flux density on the unit i, thus the loop electric power be all unit the electrodynamic vector in loop and, loop electric power and element number, current density, magnetic flux density are relevant; Another is that the Holm power that produces is shunk in the dynamic/static contact contact position because of electric current.Electric power size between contact is relevant with the quantity of the actual contact point of contact, and contact is counted fewer, and the phenomenon of electric current linear shrinkage is more remarkable, and the electric power between contact is also larger.Electrodynamic formula is between the calculating contact:
F in the formula
HBe the suffered Holm power of moving contact, μ
0Be the magnetic permeability in the vacuum, A is the contact area between the dynamic/static contact, and ξ is the contact coefficient, and span is that 0.3～0.6, H is the Brinell hardness of contact material, F
KBe the contact precompression.
The utility model content
The utility model is intended to propose a kind of moving contact that can reduce the electrodynamic low-voltage circuit breaker of contact system.
According to an embodiment of the present utility model, a kind of moving contact of low-voltage circuit breaker is proposed, comprise linkage sets of contacts, parallel conductor, moving contact support, fixed head, location-plate, conductive bus bar and arc insulating cover.The linkage sets of contacts comprises that several are set up in parallel and moving contact sheet in parallel, and the moving contact sheet is welded by conductor piece and silver contact, and the lower end of moving contact sheet is connected to soft connection conductor, is provided with insulating spacer between per two moving contact sheets.The linkage sets of contacts is installed on the moving contact support, and the moving contact support has the cavity of holding, and holds cavity and holds conductor piece on the moving contact sheet, and the moving contact support is that insulating material is made.Fixed head is two, is installed in respectively the both sides of moving contact support.Location-plate is installed on the lower end of fixed head.Conductive bus bar is fixed on the location-plate, and conductive bus bar is connected to soft connection conductor.Arc insulating cover is installed on the moving contact support, and arc insulating cover is positioned at the following outside of silver contact of linkage sets of contacts.
In one embodiment, one end of soft connection conductor is connected to the lower end of moving contact sheet, the other end of soft connection conductor is connected to conductive bus bar, current path for the silver contact of the conductor piece, the moving contact sheet that connect conductor, moving contact sheet through conductive bus bar, flexible connection to fixed contact.
In one embodiment, have axis hole on the fixed head, the revolution back shaft is installed in the axis hole, and the revolution back shaft laterally runs through the moving contact support, and the two ends of arc insulating cover are provided with the protection chamber, the two ends that the revolution back shaft is covered in the protection chamber.Have through hole on moving contact sheet and the insulating spacer, the revolution back shaft runs through the through hole on moving contact sheet and the insulating spacer.
In one embodiment, the two sides of moving contact insulation support are fixed in the upper end of fixed head, and the lower end of fixed head has cylinder boss, has arc groove on the location-plate, and cylinder boss cooperates with arc groove.
In one embodiment, a side arrangement of moving contact sheet has at least one boss, and the insulating spacer adjacent with this side is provided with the shrinkage pool corresponding with this lug boss position, and boss cooperates with shrinkage pool.
In one embodiment, the boss on all moving contact sheets is positioned on the side of the same side of moving contact sheet.On two adjacent moving contact sheets, stagger mutually in the position of boss.
In one embodiment, be provided with spring on the moving contact support, spring fitting has projection on the moving contact sheet within holding cavity, and the position of projection is corresponding with the position of spring.
In one embodiment, conductor piece is latten(-tin).
The moving contact of low-voltage circuit breaker of the present utility model has improved the dynamic stability of moving contact of breaker and the short circuit breaking capacity of circuit breaker.Adopt the isolation of small boss and the guidance mode of insulating barrier between the moving contact sheet, dwindled the spacing between the moving contact sheet, guaranteeing to have increased the quantity of moving contact sheet and the width of moving contact sheet and contact thereof in the constant situation of moving contact insulation support width, in limited space, increased the contact line length of dynamic/static contact, increased area of dissipation, reduce electrodynamic repulsion force, reduced contact resistance, reduced temperature rise.The moving contact of low-voltage circuit breaker of the present utility model has improved load current value and the short time withstand current value of circuit breaker in the situation that does not change the circuit breaker volume.
Description of drawings
It is more obvious that the above and other feature of the utility model, character and advantage will become by the description below in conjunction with drawings and Examples, and identical Reference numeral represents identical feature all the time in the accompanying drawings, wherein:
Fig. 1 has disclosed the structure chart according to the moving contact support in the moving contact of the low-voltage circuit breaker of an embodiment of the present utility model.
Fig. 2 has disclosed the decomposition chart according to the moving contact of the low-voltage circuit breaker of an embodiment of the present utility model.
Fig. 3 has disclosed the decomposition chart according to another angle of the moving contact of the low-voltage circuit breaker of an embodiment of the present utility model.
Fig. 4 has disclosed the layout plan according to moving contact sheet in the moving contact of the low-voltage circuit breaker of an embodiment of the present utility model.
Embodiment
The defective that can not meet the demands for traditional contact system structure, the utility model proposes a kind of novel contact system, removed the next door in the moving contact support chamber, adopt the contact blade side arrange boss and between the mode that partition combines be set come the guidance contacts sheet, the small boss guide spring is set simultaneously, the utility model has increased the quantity of dynamic/static contact contact point, and Holm power is reduced, thereby the electric power of contact system is reduced.
With reference to figure 1～Fig. 4, the movable contact system of this circuit breaker is located in the movable contact head cavity of body of circuit breaker, matches with fixed contact and plays switching effect to circuit.As shown in the figure, the moving contact 100 of this low-voltage circuit breaker comprises: linkage sets of contacts 101, moving contact support 102, fixed head 103, location-plate 109, conductive bus bar 110 and arc insulating cover 104.Linkage sets of contacts 101 comprises that several are set up in parallel and moving contact sheet 111 in parallel, and moving contact sheet 111 is welded (with reference to shown in Figure 4) by conductor piece 115 and silver contact 116, and in one embodiment, conductor piece 115 is latten(-tin)s.The lower end of moving contact sheet 111 is connected to soft connection conductor 108, is provided with insulating spacer 105 between per two moving contact sheets 111.Linkage sets of contacts 101 is installed on the moving contact support 102, moving contact support 102 has the cavity of holding, hold cavity and hold conductor piece 115 on the moving contact sheet 111, be provided with spring 106 on the moving contact support 102, spring 106 is installed in and holds in the cavity.Moving contact support 102 is that insulating material is made.Fixed head 103 is two, and two fixed heads 103 are installed in respectively the both sides of moving contact support 102.109 location-plates are installed on the lower end of fixed head 103.As shown in Figures 2 and 3, the two sides of moving contact insulation support 102 are fixed in the upper end of fixed head 103, the lower end of fixed head 103 has cylinder boss 130, has arc groove 190 on the location-plate 109, and cylinder boss 130 cooperates to be connected and fixed plate 103 and location-plate 109 with arc groove 190.Conductive bus bar 110 is fixed on the location-plate 109, and conductive bus bar 110 is cylindrical, and conductive bus bar 110 is connected to soft connection conductor 108.Arc insulating cover 104 is installed on the moving contact support 102, and arc insulating cover 104 is positioned at the position of silver contact below 116 of linkage sets of contacts 101, and is positioned at the outside.
Continue the embodiment of referenced in schematic; have axis hole 131 on the fixed head 103, revolution back shaft 107 is installed in the axis hole 131, and revolution back shaft 107 laterally runs through moving contact support 102; the two ends of arc insulating cover 104 are provided with protection chamber 140, the two ends that revolution back shaft 107 is covered in protection chamber 140.Have through hole on moving contact sheet 111 and the insulating spacer 105.With reference to shown in Figure 4, have the first through hole 117 on the moving contact sheet 111, have the second through hole 150 on the insulating spacer 105.Revolution back shaft 107 runs through the first through hole 117 and the second through hole 150 on moving contact sheet 111 and the insulating spacer 105.
Current trend in the moving contact of this low-voltage circuit breaker system is as follows: an end of soft connection conductor 108 is connected to the lower end of moving contact sheet 111, the other end of soft connection conductor 108 is connected to conductive bus bar 110, current path for the silver contact 116 of the conductor piece 115, the moving contact sheet 111 that connect conductor 108, moving contact sheet 111 through conductive bus bar 110, flexible connection to fixed contact.
With reference to shown in Figure 4, Fig. 4 has further disclosed the structure of moving contact sheet 111.Be furnished with at least one boss 113 on the side of moving contact sheet 111, be provided with the shrinkage pool 114 corresponding with this boss 113 positions on the insulating spacer 105.When moving contact sheet 111 and insulating spacer 105 were bonded to each other, boss 113 and shrinkage pool 114 cooperatively interacted, and so just a moving contact sheet 111 and an insulating spacer 105 are mated, and realize being synchronized with the movement.Boss 113 also plays the effect of the moving contact sheet 111 that is spaced apart adjacent except a bonding insulating spacer 105.Desirable operating mode is: a moving contact sheet 111 can with 105 motions of an insulating spacer, still can effectively be isolated between the different moving contact sheets 111, respectively independently moving.Boss 113 just plays the effect of the adjacent moving contact sheet 111 in interval.In the embodiment shown in fig. 4, the boss on all moving contact sheets 111 all is positioned on the side of the same side of moving contact sheet 111, and corresponding, each moving contact sheet 111 just cooperates with the insulating barrier 105 that is positioned at this side one side.As shown in the figure, have two boss 113 on the side of each moving contact sheet 111, and stagger mutually in the position of two boss 113 on the adjacent moving contact sheet 111.In one embodiment, also have projection 118 on moving contact sheet 111, the position of projection 118 is corresponding with the position of spring 106.The quantity of projection 118 can be two.
Fig. 1～Fig. 4 has further disclosed the moving contact according to the low-voltage circuit breaker of an embodiment of the present utility model.Wherein Fig. 1 has disclosed the structure of moving contact support among this embodiment, and Fig. 4 discloses the layout of moving contact sheet among this embodiment, and Fig. 2 and Fig. 3 have disclosed the decomposition texture of moving contact of the low-voltage circuit breaker of this embodiment from two different angles.
This embodiment is in the structure that guarantees optimal design moving contact under the constant prerequisite of existing circuit breaker constancy of volume and moving contact insulation support width and cavity volume and suitably increase touch spring power, reaches the purpose that improves short circuit withstand capacity.This embodiment provides a kind of high performance low-voltage circuit breaker moving contact that can increase substantially the short time withstand current (Icw) of low-voltage circuit breaker.
The moving contact of this low-voltage circuit breaker comprises: the linkage sets of contacts 101 moving contact supports 102 that are comprised of moving contact sheet 111, a pair of fixed head 103, arc insulating cover 104, vertical insulating spacer 105, spring 106, revolution back shaft 107, soft connection conductor 108, location-plate 109, the columned conductive bus bar 110 of a component.Moving contact support 102 is provided with a cavity that holds the conductor piece on the moving contact sheet 111.The two sides of the upper end of a pair of fixed head 103 and moving contact support 102 are fixed, and match with the arc groove of location-plate 109 in the lower end of fixed head 103.Cylindric conductive bus bar 110 is fixed on the location-plate 109.Arc insulating cover 104 places the following outside of the silver contact of moving contact sheet 111, and the two ends of arc insulating cover 104 are fixed on the both sides of moving contact support 102 with a pair of fixed head 103.The vertical insulating spacer 105 of the linkage sets of contacts 101 that is comprised of moving contact sheet 111 and a component places two ends to be positioned on the revolution back shaft 107 on a pair of fixed head 103.The two ends of revolution back shaft 107 stop in the protection chamber of correspondence with it with the both ends of arc insulating cover 104.Moving contact sheet 111 is to be welded by latten(-tin) and silver contact, and moving contact sheet 111 lower end cavitys are connected with an end of soft connection conductor 108, and the other end of soft connection conductor 108 connects the formation galvanic circle with columned conductive bus bar 110.Electric current in the low-voltage circuit breaker major loop from outer busbar flow to cylindric conductive bus bar, the conductor piece, the silver contact of moving contact sheet, the fixed contact that connect conductor, moving contact sheet, moving contact sheet through flexible connection flow to external busbar, or in contrast.
In the linkage sets of contacts 101 that is formed by a plurality of moving contact sheets 111, be provided with insulating barrier 105 between the moving contact sheet 111.(shown in the figure for left side) is furnished with two boss 113 on 111 1 sides of moving contact sheet, is positioned at accordingly to be provided with the shrinkage pool 114 corresponding with boss 113 on the moving contact sheet 111 on the insulating barrier 105 in left side of moving contact sheet 111.All be provided with the insulating spacer 105 of discrete layout between per two adjacent moving contact sheets 111, insulating spacer 105 is installed on the revolution back shaft 107 with moving contact sheet 111, and the two ends of revolution back shaft 107 are positioned in the axis hole on a pair of fixed head 103.The quantity of the boss 113 on the moving contact sheet 111 is two, and all moving contact sheets 111 boss 113 all be arranged on the same side, boss 113 can be guaranteed moving contact sheet 111 and a slice insulating barrier 105 associated movements, and adjacent moving contact sheet 111 can not be sticked together to guarantee flexible operation.Also be furnished with up and down two small boss 118 on the moving contact sheet 111, the spring 106 corresponding layouts of the position of small boss 118 and moving contact support 102.
The moving contact of low-voltage circuit breaker of the present utility model has improved the dynamic stability of moving contact of breaker and the short circuit breaking capacity of circuit breaker.Adopt the isolation of small boss and the guidance mode of insulating barrier between the moving contact sheet, dwindled the spacing between the moving contact sheet, guaranteeing to have increased the quantity of moving contact sheet and the width of moving contact sheet and contact thereof in the constant situation of moving contact insulation support width, in limited space, increased the contact line length of dynamic/static contact, increased area of dissipation, reduce electrodynamic repulsion force, reduced contact resistance, reduced temperature rise.The moving contact of low-voltage circuit breaker of the present utility model has improved load current value and the short time withstand current value of circuit breaker in the situation that does not change the circuit breaker volume.
Above-described embodiment provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be in the situation that does not break away from utility model thought of the present utility model; above-described embodiment is made various modifications or variation; thereby protection range of the present utility model do not limit by above-described embodiment, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (9)
1. the moving contact of a low-voltage circuit breaker is characterized in that, comprising:
The linkage sets of contacts, the linkage sets of contacts comprises that several are set up in parallel and moving contact sheet in parallel, described moving contact sheet is welded by conductor piece and silver contact, and the lower end of moving contact sheet is connected to soft connection conductor, is provided with insulating spacer between per two moving contact sheets;
Moving contact support, linkage sets of contacts are installed on the moving contact support, and the moving contact support has the cavity of holding, and hold cavity and hold conductor piece on the described moving contact sheet, and the moving contact support is that insulating material is made;
Fixed head, fixed head are two, are installed in respectively the both sides of moving contact support;
Location-plate, location-plate are installed on the lower end of fixed head;
Conductive bus bar, conductive bus bar are fixed on the location-plate, and conductive bus bar is connected to described soft connection conductor;
Arc insulating cover, arc insulating cover are installed on the moving contact support, and arc insulating cover is positioned at the following outside of silver contact of linkage sets of contacts.
2. the moving contact of low-voltage circuit breaker as claimed in claim 1, it is characterized in that, one end of soft connection conductor is connected to the lower end of moving contact sheet, the other end of soft connection conductor is connected to conductive bus bar, current path for the silver contact of the conductor piece, the moving contact sheet that connect conductor, moving contact sheet through conductive bus bar, flexible connection to fixed contact.
3. the moving contact of low-voltage circuit breaker as claimed in claim 1, it is characterized in that, have axis hole on the fixed head, the revolution back shaft is installed in the axis hole, the revolution back shaft laterally runs through described moving contact support, the two ends of described arc insulating cover are provided with the protection chamber, the two ends that the revolution back shaft is covered in the protection chamber;
Have through hole on described moving contact sheet and the insulating spacer, the revolution back shaft runs through the through hole on moving contact sheet and the insulating spacer.
4. the moving contact of low-voltage circuit breaker as claimed in claim 1, it is characterized in that the two sides of moving contact insulation support are fixed in the upper end of described fixed head, the lower end of fixed head has cylinder boss, have arc groove on the described location-plate, cylinder boss cooperates with arc groove.
5. the moving contact of low-voltage circuit breaker as claimed in claim 1 is characterized in that,
A side arrangement of described moving contact sheet has at least one boss, and the insulating spacer adjacent with this side is provided with the shrinkage pool corresponding with this lug boss position, and described boss cooperates with shrinkage pool.
6. the moving contact of low-voltage circuit breaker as claimed in claim 5 is characterized in that, the boss on all moving contact sheets is positioned on the side of the same side of moving contact sheet.
7. the moving contact of low-voltage circuit breaker as claimed in claim 6 is characterized in that, on two adjacent moving contact sheets, stagger mutually in the position of described boss.
8. the moving contact of low-voltage circuit breaker as claimed in claim 1 is characterized in that, is provided with spring on the moving contact support, and spring fitting has projection on the described moving contact sheet within holding cavity, and the position of projection is corresponding with the position of spring.
9. the moving contact of low-voltage circuit breaker as claimed in claim 1 is characterized in that, described conductor piece is latten(-tin).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376907 CN202816838U (en) | 2012-07-31 | 2012-07-31 | Movable contact of low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376907 CN202816838U (en) | 2012-07-31 | 2012-07-31 | Movable contact of low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202816838U true CN202816838U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220376907 Expired - Lifetime CN202816838U (en) | 2012-07-31 | 2012-07-31 | Movable contact of low-voltage circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN202816838U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409248A (en) * | 2014-11-28 | 2015-03-11 | 德力西电气有限公司 | Contact system with automatic arc blowing function |
| CN104465255A (en) * | 2014-12-25 | 2015-03-25 | 常熟开关制造有限公司(原常熟开关厂） | Low-voltage circuit breaker contact system |
| CN105047495A (en) * | 2015-06-17 | 2015-11-11 | 乐清野岛机电有限公司 | Plate type contact system of conventional circuit breaker |
| CN105428098A (en) * | 2015-12-10 | 2016-03-23 | 二一三电器(上海)有限公司 | Double-breakpoint moving contact apparatus |
| CN105529229A (en) * | 2015-12-30 | 2016-04-27 | 陕西科技大学 | Contact support structure for air circuit breaker contact system |
| CN105762039A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN105762038A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN106971867A (en) * | 2017-05-24 | 2017-07-21 | 首瑞（天津）电气设备有限公司 | Moving contact and breaker |
| CN109300714A (en) * | 2018-11-22 | 2019-02-01 | 法泰电器（江苏）股份有限公司 | A kind of novel breaker moving contact |
| CN110473750A (en) * | 2018-05-11 | 2019-11-19 | 上海电器股份有限公司人民电器厂 | A kind of improvement contact system of low-voltage circuit breaker |
| CN110571110A (en) * | 2019-08-30 | 2019-12-13 | 德力西电气有限公司 | Moving contact of circuit breaker |
-
2012
- 2012-07-31 CN CN 201220376907 patent/CN202816838U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409248A (en) * | 2014-11-28 | 2015-03-11 | 德力西电气有限公司 | Contact system with automatic arc blowing function |
| CN104465255A (en) * | 2014-12-25 | 2015-03-25 | 常熟开关制造有限公司(原常熟开关厂） | Low-voltage circuit breaker contact system |
| CN104465255B (en) * | 2014-12-25 | 2016-07-06 | 常熟开关制造有限公司(原常熟开关厂） | A kind of low-voltage breaker contact system |
| CN105047495B (en) * | 2015-06-17 | 2017-04-05 | 乐清野岛机电有限公司 | The board-like contact system of omnipotent breaker |
| CN105047495A (en) * | 2015-06-17 | 2015-11-11 | 乐清野岛机电有限公司 | Plate type contact system of conventional circuit breaker |
| CN105428098A (en) * | 2015-12-10 | 2016-03-23 | 二一三电器(上海)有限公司 | Double-breakpoint moving contact apparatus |
| CN105529229A (en) * | 2015-12-30 | 2016-04-27 | 陕西科技大学 | Contact support structure for air circuit breaker contact system |
| CN105762039A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN105762038A (en) * | 2016-04-29 | 2016-07-13 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN106971867A (en) * | 2017-05-24 | 2017-07-21 | 首瑞（天津）电气设备有限公司 | Moving contact and breaker |
| CN110473750A (en) * | 2018-05-11 | 2019-11-19 | 上海电器股份有限公司人民电器厂 | A kind of improvement contact system of low-voltage circuit breaker |
| CN110473750B (en) * | 2018-05-11 | 2024-05-14 | 上海电器股份有限公司人民电器厂 | Improved contact system of low-voltage circuit breaker |
| CN109300714A (en) * | 2018-11-22 | 2019-02-01 | 法泰电器（江苏）股份有限公司 | A kind of novel breaker moving contact |
| CN110571110A (en) * | 2019-08-30 | 2019-12-13 | 德力西电气有限公司 | Moving contact of circuit breaker |
| CN110571110B (en) * | 2019-08-30 | 2024-06-04 | 德力西电气有限公司 | Moving contact of circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130320 |
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| CX01 | Expiry of patent term |