CN113990717A - Moving contact system of circuit breaker - Google Patents
Moving contact system of circuit breaker Download PDFInfo
- Publication number
- CN113990717A CN113990717A CN202010726219.5A CN202010726219A CN113990717A CN 113990717 A CN113990717 A CN 113990717A CN 202010726219 A CN202010726219 A CN 202010726219A CN 113990717 A CN113990717 A CN 113990717A
- Authority
- CN
- China
- Prior art keywords
- movable contact
- moving contact
- flexible connection
- circuit breaker
- contact system
- 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.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011889 copper foil Substances 0.000 claims abstract description 34
- 239000004020 conductor Substances 0.000 claims abstract description 20
- 238000003466 welding Methods 0.000 claims description 27
- 230000001681 protective effect Effects 0.000 claims description 17
- 238000005056 compaction Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
Abstract
The invention provides a moving contact system of a circuit breaker, which mainly solves the problems of high temperature rise and low conductive efficiency of the contact system. The moving contact system comprises a moving contact, a moving contact arm, a flexible connection and a connecting plate, wherein the moving contact is welded with the moving contact arm to form a conductive path, the moving contact arm, the flexible connection and the connecting plate are sequentially connected to form an electrical path, and the electrical path comprises a conductor formed by stacking a plurality of layers of copper foils, so that the moving contact system can freely move during opening and closing. The moving contact with the copper foil flexible connection is designed to replace the existing braided wire flexible connection; the circuit breaker greatly saves the use space, increases the current carrying area of the flexible connection, improves the heat dissipation effect, greatly reduces the overall temperature rise of the circuit breaker, and ensures the use reliability of the circuit breaker.
Description
Technical Field
The invention relates to a circuit breaker, in particular to a contact system of the circuit breaker
Background
The low-voltage circuit breaker comprises a moving contact system 1, a static contact system 2, an arc extinguishing system 3, a shell 4, an operating mechanism 5, a control protection unit 6 and the like.
The operating mechanism 5 drives the moving contact system 1 and the static contact system 2 to contact or separate to realize closing and opening of the main circuit, when a fault current is led out of the main circuit, the control protection unit circuit 6 sends out a tripping instruction, after the tripping mechanism in the operating mechanism 5 is tripped, the moving contact system 1 and the static contact system 2 are opened, electric arcs are generated in the opening process, and the electric arcs enter the arc extinguish chamber 3 to extinguish.
The moving contact system in the prior art includes a moving contact 11, a flexible connection 113 and a connection board 114, which are connected in sequence to form a conductive path, wherein the moving contact 11 includes a moving contact 111 and a moving contact arm 112, which are welded together to form a first welding position 11 a. When closing, the moving contact 111 makes electrical contact with the static contact system 2. The flexible connection 113 is formed by weaving a thin copper wire, and has one end welded to the movable contact arm 112 at the second welding position 11b and the other end welded to the connection plate 114 at the third welding position 11c to form an electrical connection. It should be noted that in the circuit breaker with a larger rated current, the moving contact system 1 of one pole adopts a plurality of moving contacts 11 connected in parallel to form a plurality of contact points and a plurality of paths, so as to increase the surface area of the contact points and the current paths, and reduce the influence of hall force and skin effect. For example, in a circuit breaker with a rated current of 1600A, each of the moving contact systems 1 employs 5 to 7 moving contacts 11 in fig. 3, so that the moving contact system 1 has 15 to 21 welding points, and only the moving contact system 1 of the three-pole circuit breaker has 45 to 63 welding points, which are parts of the current path that generate heat seriously and become one of the important factors for increasing the temperature of the moving contact system 1. In addition, the flexible connection 113 is woven by thin copper wires, although the number of the copper wires is increased by a compact weaving mode, a large number of gaps which cannot be compacted and filled exist, so that the equivalent conductive cross section is small, and although the number of the copper wires can be increased to improve a conductive interface, the flexible connection is hard to be beneficial to the rotation of the moving contact, so that the flexible connection is also another important factor for causing the temperature rise of the moving contact system 1.
Because the moving contact system in the circuit breaker mainly plays a role in separating and connecting for conduction, and the space of a shell on which the moving contact system is installed is limited, related conductive parts cannot fully meet the current-carrying requirement of conduction, particularly flexible connection parts, so that the moving contact system is a main conductive heating source during connection work, the temperature rise of the whole circuit breaker is high, and the service performance of the whole circuit breaker is influenced;
the prior art does not solve the problem that the temperature of the movable contact is too high, does not increase relevant temperature control measures, and has the phenomenon that the connection point is burnt out due to long-time over-temperature in the field; thereby influencing the reliability and potential safety hazard of the breaker;
disclosure of Invention
The invention aims to provide a movable contact system of a circuit breaker with copper foil laminated flexible connection, which solves the problems of high temperature and low conductive efficiency of the contact system
In order to achieve the aim, the invention designs a moving contact with copper foil flexible connection, which is used in a moving contact system of a circuit breaker;
the invention relates to a moving contact system of a circuit breaker, which comprises a moving contact, a moving contact arm, a flexible connection and a connecting plate, wherein the moving contact is welded with the moving contact arm to form a conductive path; the flexible connection is positioned on the flexible part, so that the moving contact system can move freely when the switch is switched on and off.
Further, the conductor formed by the copper foil lamination is in flexible connection; one end of the compaction part at the two ends is connected with the movable contact arm to form an electric path, and the other end of the compaction part is connected with the connecting plate to form an electric path.
Furthermore, the compacted end is electrically connected with the movable contact arm in a welding mode.
In another embodiment of the invention, the conductor formed by the copper foil lamination comprises a flexible connection and a connection board; one end of the compaction part at the two ends is connected with the movable contact arm on a soft connection to form an electric path, and the other end of the compaction part forms a rigid wiring structure on the connecting plate.
Furthermore, the connection board further comprises a part of flexible structure, which is positioned at one side electrically connected with the flexible connection.
In another embodiment of the invention, the conductor formed by the copper foil lamination comprises a movable contact arm, a flexible connection and a connecting plate; one end of the compaction part at the two ends is compacted into rigidity to form a movable contact arm, and the other end of the compaction part is compacted into rigidity to form a connecting plate.
Furthermore, the connection board further comprises a part of flexible structure, which is positioned at one side electrically connected with the flexible connection.
Based on the technical structures of all the moving contact systems, the invention also comprises a protective shell positioned at least one junction of the flexible connection and other structures, and the edge of one side of the protective shell facing the conductor is provided with an arc-shaped structure so as to prevent the copper foil from being broken when the moving contact system rotates.
Furthermore, the device also comprises a rotating shaft penetrating through the movable contact arm, and a protective shell at the junction of the flexible connection and the movable contact arm is arranged on the rotating shaft to ensure the synchronous rotation with the movable contact arm; the protective shell of the soft connection and connection plate junction contact covers part of the flexible structure.
The invention has the technical effects that the existing braided wire flexible connection is replaced by the design of the flexible connection moving contact with the copper foil; the use space is greatly saved, namely the current carrying area of the flexible connection is increased in the limited shell space, and the heat dissipation effect is also improved, so that the overall temperature rise of the circuit breaker is greatly reduced, the temperature rise of the overall circuit breaker is effectively controlled, the use reliability of the circuit breaker is ensured, and the copper foil flexible connection structure is simple and convenient to install.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a conventional circuit breaker;
figure 2 is a schematic diagram of a prior art circuit breaker contact system;
fig. 3 is a schematic diagram of a movable contact system of a prior circuit breaker;
figure 4 is a schematic view of a first embodiment of a movable contact system to which the present invention relates;
FIG. 5 is a schematic view of a conductor formed using laminated copper foils according to the present invention;
figure 6 is a schematic view of a second embodiment of the movable contact system to which the present invention relates;
FIG. 7 is a schematic view of an electrically conductive connection of a movable contact system to which the present invention relates;
figure 8 is a schematic view of a third embodiment of the movable contact system to which the present invention relates;
fig. 9 is a schematic view of a movable contact system with a protective housing according to the present invention;
fig. 10 is an enlarged partial schematic view of a movable contact system with a protective housing according to the present invention;
Detailed Description
The invention provides a novel moving contact system which structurally comprises a moving contact, a flexible coupling and a connecting plate.
According to one embodiment of the present invention shown in fig. 4, the movable contact system comprises a movable contact 21, a flexible connection 213 and a connecting plate 214, which are connected in turn to form a conductive path, wherein the movable contact 21 comprises a movable contact 211 and a movable contact arm 212, which are welded together to form a first welding position 21 a. The moving contact 211 makes electrical contact with the stationary contact system 2 upon closing. The flexible connection 213 is formed by laminating copper foils, welding compacted parts A are arranged at two ends, the middle flexible part B is kept in the original flexible state, and a conductor with two ends compacted into rigidity and a middle flexible bending state is formed so as to meet the flexible rotation of the moving contact system. One end (one section a) of the flexible connection 213 is soldered or riveted to the movable contact arm 212 at the second connection position 21b, and the other end (the other section a) is soldered to the connection plate 214 at the third soldering position 21 c. In this embodiment, each pole moving contact system 1 still has 45-63 welding points, but the weaving line type flexible connection 113 is changed into the copper foil laminated flexible connection 213, so the conductive section is not reduced, and the effective conductive section is greatly increased based on the principle of skin effect. In this embodiment, each moving contact arm 212 and each flexible coupling 213 are electrically connected together to form an assembly, and a plurality of such assemblies are welded to the connecting plate 214 to form a plurality of conductive paths, thereby forming the moving contact system 1. Because the laminated copper foil is adopted, the current flowing through the flexible connection 213 has a standard flow direction, and meanwhile, in order to ensure that the moving contact 21 has enough rotational freedom degree during opening and closing, the flexible connection 213 is bent to a certain radian, and the current I1And I2In the case of a flexible connection 213 of the laminated copper foil type, the current path of which is normal, the movable contact arm 212 is provided with an electrodynamic force which closes the stationary contact system 2, compensating for the increased pressure of the closing of the contacts, by forming a mutually repulsive magnetic field on the inside of the bend, with a reversed current componentThe compensation effect of the electrodynamic force is improved to the maximum extent.
Further, when the flexible connection 213 is formed by bending, each layer of copper foil in the middle flexible portion B has different bending radians or lengths, so that after the moving contact system and the static contact system are closed, a gap is formed between the copper foils to form an air cavity, and heat dissipation at the position is more powerful.
The conductor of the laminated copper foil structure of the invention is further explained according to fig. 5, and adopts copper foil or thin copper sheet made of pure copper with good conductive performance and metal ductility, and the two ends are made into a rigid whole body by resistance welding or upsetting in a multi-sheet stacking mode, and the middle part is also in a laminated mode to form a flexible area. In order to better meet the requirement of frequent action of a moving contact system, the laminated copper foil can be bent into a structure suitable for installation and action before welding or upsetting, then compacted into a rigid whole, and finally machined and modified. Therefore, the conductor has better service life and gives more rotational freedom degrees to the moving contact. The general structure of the conductor of the laminated copper foil structure is illustrated in the drawings, and the structure of the above-described better processing manner which can be achieved is not shown, but it is believed that the specific structure thereof will be understood based on the above-described description of the solution.
According to another embodiment of the present invention shown in fig. 6, the movable contact system comprises a movable contact 31, a flexible connection 313 and a connection plate 314, which are connected in turn to form a conductive path, wherein the movable contact 31 comprises a movable contact 311 and a movable contact arm 312, which are welded together to form a first welding position 31 a. The moving contact 311 makes electrical contact with the static contact system 2 upon closing. The flexible connection 313 is formed by laminating copper foils and has a compacted portion A electrically connected with the movable contact arm 312, the segment A and the movable contact arm 312 are welded or riveted at the second connection position 31B to form an electrical connection, and the middle flexible portion B is kept in an original flexible state to meet the flexible connection flexibility of the copper foils. In contrast to the structure of fig. 4, the connection plate 314 of the present embodiment is also formed by compacting a laminated copper foil. Furthermore, the flexible connection 313 and the connection plate 314 are integrally manufactured by laminating copper foils, both ends of the flexible connection are compacted, one end of the flexible connection is welded with the movable contact arm 312, the other end of the flexible connection is formed on the connection plate 314 to be a rigid structure, and the flexible connection is connected with a subsequent conductive system to form a conductor, both ends of the conductor are compacted to be rigid, and the middle of the conductor can be flexibly bent, so that the flexible rotation of the movable contact system is met. The middle flexible part ensures that the flexible connection 313 is formed flexibly, so that welding points between the flexible connection and the connecting plate in the embodiment are eliminated, one third of the welding points are omitted from the whole contact system, and the temperature rise of the original welding position is reduced.
Furthermore, because the connecting plate and the flexible connection are integrally formed, the space and structure consumption of the original welding position is reduced, and particularly, in order to meet the requirement of free rotation of welding and flexible connection (the rigid structure of the welding point influences the free rotation of the flexible connection), the compromise between the length of the flexible connection and the length of the connecting plate needs to be carried out in a certain space range.
Further, in the embodiment of fig. 4, the soldering position between the flexible connection 213 and the connection plate 214 forms a solder-compacted indentation structure, which may cause the individual copper foils to break after repeated rotation of the contact system, and may cause a short circuit if the broken copper foils are on the outermost layers. Therefore, in the preferred embodiment, the connection plate 314 has a small number of flexible portions, which are covered by the subsequent conductive plate after the connection plate 314 is electrically connected to the subsequent conductive plate, or the flexible portions on the connection plate 314 are covered by the protective mounting structure, so that the contact portion between the compacted portion and the middle flexible portion does not participate in the rotation motion of the flexible connection 313, thereby reducing the risk of the copper foil breaking.
According to another embodiment of the present invention shown in fig. 8, the movable contact system comprises a movable contact 41, a flexible connection 413 and a connection board 414, which are connected in sequence to form a conductive path, wherein the movable contact 41 comprises a movable contact 411 and a movable contact arm 412, which are welded together to form a first welding position 41 a. The moving contact 411 makes electrical contact with the stationary contact system 2 upon closing. In this embodiment, the moving contact arm 412, the flexible connection 413 and the connection plate 414 are integrally formed by copper foils, the copper foil at the moving contact arm 412 is compacted into rigidity and then processed into a flexible conductor at the flexible connection 413, and the copper foil at the connection plate 414 is compacted into a rigid conductor at the middle to form a flexible conductor with two ends compacted into rigidity, so as to meet the requirement of flexible rotation of the moving contact system. Of course, similar to the embodiment of fig. 6, the connection plate 414 has a small number of flexible portions, which are covered by the subsequent conductive plate after the connection plate 414 is electrically connected to the subsequent conductive plate, or the flexible portions on the connection plate 414 are covered by the protective mounting structure, so that the contact position of the embossed portion and the middle flexible portion does not participate in the rotation motion of the flexible connection 413, thereby reducing the risk of the copper foil breaking, and of course, the embossed portion at the movable contact arm 412 can be treated similarly to prevent the risk of the copper foil breaking.
In the structure of this embodiment, on the basis of fig. 6, a welding structure between the flexible connection 413 and the moving contact arm 412 is eliminated, that is, two welding points between the moving contact arm 412 and the flexible connection 413 and between the moving contact arm and the connection plate 414 are eliminated, the whole contact system only has the welding point between the moving contact 411 and the moving contact arm 412, and the single-pole moving contact system 1 only has 5-7 welding points. Taking the circuit breaker with three poles 1600A as an example, the number of welding points is reduced to 15 to 21, and the temperature rise of the system is greatly reduced. With the embodiment of fig. 6, the connection plate 414 has a small number of flexible portions, reducing the risk of breaking the copper foil.
According to another embodiment of the present invention shown in fig. 9, in order to ensure the service life of the copper foil moving contact, protective shells 701 and 702 are installed at the interface between the copper foil flexible connection welding fused end 901 and the flexible region 902, wherein the protective shell 701 is located at the interface between the moving contact arm and the flexible connection, and the protective shell 702 is located at the interface between the connecting plate and the flexible connection and covers part of the flexible structure. The protection shell 701 is fixed by a moving contact rotating shaft 801, and the rotation synchronization with the moving contact is ensured. The protective shell 702 is fixed by a fastener 802, the side of the protective shell facing the flexible connection is provided with edges 7011 and 7021 with arc transition structures, and the arc size of the edges is matched with the bending degree of the flexible connection during opening and closing to ensure that the edges 7011 and 7021 are not stamped on the flexible connection in a sharp structure to cause the breakage of the flexible connection. In addition, in order to meet the requirement of frequent bending of the flexible connection, in the direction that the flexible connection of the copper foils extends from the welding fusion end 901 to the flexible area 902, the gap between the laminated copper foils is gradually enlarged, and edge arc transition is adopted, so that the bending damage to the flexible connection can be reduced, and the service life requirement of the moving contact system is improved.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (9)
1. A movable contact system of a circuit breaker comprises a movable contact, a movable contact arm, a flexible connection and a connecting plate, wherein the movable contact and the movable contact arm are welded together to form a conductive path; the flexible connection is positioned on the flexible part, so that the moving contact system can move freely when the switch is switched on and off.
2. The movable contact system of a circuit breaker of claim 1, wherein said copper foil laminate forms a conductor that is a flexible connection; one end of the compaction part at the two ends is connected with the movable contact arm to form an electric path, and the other end of the compaction part is connected with the connecting plate to form an electric path.
3. The movable contact system of a circuit breaker of claim 2 wherein said compacted end is electrically connected to the movable contact arm by welding.
4. The movable contact system of a circuit breaker of claim 1, wherein said copper foil laminate forms a conductor comprising flexible connections and connection plates; one end of the compaction part at the two ends is connected with the movable contact arm on a soft connection to form an electric path, and the other end of the compaction part forms a rigid wiring structure on the connecting plate.
5. The movable contact system of a circuit breaker of claim 4, wherein said connecting plate further comprises a portion of a flexible structure disposed on a side electrically connected to said flexible connection.
6. The movable contact system of a circuit breaker of claim 1 wherein said copper foil laminate forms a conductor comprising a movable contact arm, a flexible connection and a connecting plate; one end of the compaction part at the two ends is compacted into rigidity to form a movable contact arm, and the other end of the compaction part is compacted into rigidity to form a connecting plate.
7. The movable contact system of a circuit breaker of claim 6, wherein said connecting plate further comprises a portion of a flexible structure disposed on a side electrically connected to said flexible connection.
8. The movable contact system of any one of claims 2 to 7, further comprising a protective housing at least one interface of the flexible connection with other structures, wherein an edge of a side of the protective housing facing the conductor has an arcuate configuration to prevent the copper foil from breaking when the movable contact system is rotated.
9. The movable contact system of a circuit breaker of claim 8 further comprising a rotating shaft passing through the movable contact arm, wherein the protective housing at the interface of said flexible connection and the movable contact arm is mounted on the rotating shaft to ensure synchronous rotation with the movable contact arm; the protective shell of the soft connection and connection plate junction contact covers part of the flexible structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010726219.5A CN113990717A (en) | 2020-07-27 | 2020-07-27 | Moving contact system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010726219.5A CN113990717A (en) | 2020-07-27 | 2020-07-27 | Moving contact system of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113990717A true CN113990717A (en) | 2022-01-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010726219.5A Pending CN113990717A (en) | 2020-07-27 | 2020-07-27 | Moving contact system of circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN113990717A (en) |
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|---|---|---|---|---|
| CN100514525C (en) * | 2007-08-08 | 2009-07-15 | 常熟开关制造有限公司(原常熟开关厂） | Movable contact of circuit breaker |
| CN201374290Y (en) * | 2008-11-28 | 2009-12-30 | 天津市百利电气有限公司 | Flexible connection protecting component for contact system of universal circuit breaker |
| CN101685726A (en) * | 2008-09-23 | 2010-03-31 | 通用电气公司 | Circuit breaker unitary current path |
| CN201655652U (en) * | 2009-12-15 | 2010-11-24 | 上海磁浮交通发展有限公司 | Flexible connection structure for three-phase alternating current high-voltage vacuum contactor |
| 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 |
| CN204558399U (en) * | 2015-04-30 | 2015-08-12 | 宁波奇乐电气集团有限公司 | Novel breaker contact system |
| CN206422342U (en) * | 2017-02-14 | 2017-08-18 | 福建中能电气有限公司 | A kind of electric flexible connection structure |
| WO2017186061A1 (en) * | 2016-04-29 | 2017-11-02 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
-
2020
- 2020-07-27 CN CN202010726219.5A patent/CN113990717A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514525C (en) * | 2007-08-08 | 2009-07-15 | 常熟开关制造有限公司(原常熟开关厂） | Movable contact of circuit breaker |
| CN101685726A (en) * | 2008-09-23 | 2010-03-31 | 通用电气公司 | Circuit breaker unitary current path |
| CN201374290Y (en) * | 2008-11-28 | 2009-12-30 | 天津市百利电气有限公司 | Flexible connection protecting component for contact system of universal circuit breaker |
| CN201655652U (en) * | 2009-12-15 | 2010-11-24 | 上海磁浮交通发展有限公司 | Flexible connection structure for three-phase alternating current high-voltage vacuum contactor |
| 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 |
| CN204558399U (en) * | 2015-04-30 | 2015-08-12 | 宁波奇乐电气集团有限公司 | Novel breaker contact system |
| WO2017186061A1 (en) * | 2016-04-29 | 2017-11-02 | 首瑞（天津）电气设备有限公司 | Circuit breaker contact system and circuit breaker |
| CN206422342U (en) * | 2017-02-14 | 2017-08-18 | 福建中能电气有限公司 | A kind of electric flexible connection structure |
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Effective date of registration: 20220323 Address after: 200083 room 501-8a102, No. 125, Liuying Road, Hongkou District, Shanghai Applicant after: Shanghai Liangcheng Electromechanical Technology Co.,Ltd. Applicant after: JIANGSU LUOKAI MECHANICAL & ELECTRICAL Co.,Ltd. Address before: 200083 room 501-8a102, No. 125, Liuying Road, Hongkou District, Shanghai Applicant before: Shanghai Liangcheng Electromechanical Technology Co.,Ltd. |
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Effective date of registration: 20230605 Address after: 213000 No. 101 Yonganli Road, Luoyang Town, Wujin District, Changzhou City, Jiangsu Province Applicant after: JIANGSU LUOKAI MECHANICAL & ELECTRICAL Co.,Ltd. Address before: 200083 room 501-8a102, No. 125, Liuying Road, Hongkou District, Shanghai Applicant before: Shanghai Liangcheng Electromechanical Technology Co.,Ltd. Applicant before: JIANGSU LUOKAI MECHANICAL & ELECTRICAL Co.,Ltd. |