CN112927981A - Opening electromagnet of spring operating mechanism - Google Patents
Opening electromagnet of spring operating mechanism Download PDFInfo
- Publication number
- CN112927981A CN112927981A CN202110020029.6A CN202110020029A CN112927981A CN 112927981 A CN112927981 A CN 112927981A CN 202110020029 A CN202110020029 A CN 202110020029A CN 112927981 A CN112927981 A CN 112927981A
- Authority
- CN
- China
- Prior art keywords
- iron core
- spring
- moving iron
- delay
- counterweight
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Landscapes
- Braking Arrangements (AREA)
- Electromagnets (AREA)
Abstract
本发明涉及弹簧操动机构的分闸电磁铁。弹簧操动机构的分闸电磁铁包括：电磁铁主体，内部设有线圈；动铁芯，穿设在线圈中；复位簧，用于带动动铁芯后退以实现动铁芯的复位；延时配重，固定在动铁芯的后端面上，用于增大动铁芯的运动质量以减小动铁芯的动作速度；延时配重上设有弹簧挡止面，弹簧挡止面与动铁芯的后端端面平齐，供所述复位簧的端部支撑。上述方案能够较为容易地实现操动机构分闸时间的控制。
The present invention relates to an opening electromagnet of a spring operating mechanism. The opening electromagnet of the spring operating mechanism includes: the main body of the electromagnet, with a coil inside; the moving iron core, which is penetrated in the coil; the reset spring, which is used to drive the moving iron core back to realize the reset of the moving iron core; delay time The counterweight is fixed on the rear end surface of the moving iron core, and is used to increase the moving mass of the moving iron core to reduce the action speed of the moving iron core; the delay counterweight is provided with a spring stop surface, and the spring stop surface is The rear end face of the moving iron core is flush and is supported by the end of the return spring. The above solution can relatively easily realize the control of the opening time of the operating mechanism.
Description
Technical Field
The invention relates to a brake separating electromagnet of a spring operating mechanism.
Background
According to the requirements of GB1984-2014, for the current with 50% of direct-current component of rated short-circuit breaking current and 50Hz of frequency of an arc extinguishing chamber, the opening time of the vacuum circuit breaker is generally ensured to be more than 20ms at the shortest time, and the phenomenon that the arc is re-ignited due to breaking at the high peak of the current amplitude is avoided. If the opening time is too short, the breaker is easy to break down when breaking the full capacity current. When the existing breaker operates the opening brake at high voltage, the spring operating mechanism triggers the opening brake action by the opening brake electromagnet. The opening electromagnet comprises an electromagnet main body, a coil is arranged in the electromagnet main body, a movable iron core penetrates through the coil, and the opening electromagnet is driven by the coil to extend forwards to impact an opening buckle plate of the operating mechanism; the opening electromagnet also comprises a reset spring which is used for driving the movable iron core to retreat so as to realize the reset of the movable iron core.
The switching-off time of the spring operating mechanism controlled by the electromagnet is generally 18-20 ms at present, and the potential hazard exists for the normal switching-off of the vacuum circuit breaker. At present, the opening time of the spring operating mechanism is mainly adjusted by the following three modes: the transmission of the opening module of the spring operating mechanism is adjusted, the buckling quantity between the opening electromagnet and the opening buckle plate is adjusted, and the electromagnet parameters are adjusted.
However, the first method has a high design difficulty and requires life test verification; the second way may cause instability of low voltage trip; the third method needs to discuss the scheme with the electromagnet manufacturer and carry out verification for many times.
Disclosure of Invention
The invention aims to provide a brake-separating electromagnet of a spring operating mechanism, which can easily realize the control of the brake-separating time of the operating mechanism.
The opening electromagnet of the spring operating mechanism adopts the following technical scheme:
spring operating mechanism's separating brake electro-magnet includes:
the electromagnet main body is internally provided with a coil;
the movable iron core is arranged in the coil in a penetrating manner and is used for extending forwards under the driving of the coil to impact a brake separating buckle plate of the operating mechanism;
the reset spring is used for driving the movable iron core to retreat so as to realize the reset of the movable iron core;
further comprising:
the time-delay counterweight is fixed on the rear end surface of the movable iron core and is used for increasing the movement mass of the movable iron core so as to reduce the action speed of the movable iron core;
and the delay counterweight is provided with a spring stop surface which is flush with the end surface of the rear end of the movable iron core and is used for supporting the end part of the reset spring.
Has the advantages that: by adopting the technical scheme, the action speed of the movable iron core can be reduced by increasing the movement mass of the movable iron core, so that the action time is prolonged, meanwhile, the spring stop surface on the delay counterweight is flush with the rear end surface of the movable iron core, the end part of the reset spring of the opening electromagnet can be supported, the working length of the reset spring is ensured to be the same as that before the delay counterweight is added, and therefore the opening time of the operating mechanism can be controlled easily.
As a preferred technical scheme:
the time-delay counterweight is provided with a sinking groove, and the bottom wall of the sinking groove is fixedly connected with the rear end face of the movable iron core;
the inner diameter of the sinking groove is larger than the outer diameter of the reset spring, the rear end of the reset spring is embedded into the sinking groove, and the spring stop surface is formed by the groove bottom wall of the sinking groove.
Has the advantages that: by adopting the technical scheme, the axial space occupation of the movable iron core which is excessively increased after the time delay counter weight is increased can be avoided, and the problem that the space of the internal brake electromagnet of the spring operating mechanism is insufficient is avoided.
As a preferred technical scheme:
the time-delay counter weight is provided with a screw hole, and the time-delay counter weight is fixed on the rear end face of the movable iron core through a screw.
Has the advantages that: adopt above-mentioned technical scheme easy dismounting, be convenient for choose for use the time delay counter weight of suitable weight.
As a preferred technical scheme:
one side of the time delay counter weight, which is back to the movable iron core, is provided with a countersunk hole for the head of the screw to sink into.
Has the advantages that: by adopting the technical scheme, the axial space occupied by the time-delay counterweight can be further reduced.
Drawings
Fig. 1 is a schematic structural diagram of an opening electromagnet embodiment 1 of a spring operating mechanism in an opening state;
fig. 2 is a schematic structural diagram of the opening electromagnet in fig. 1 in a closing state;
FIG. 3 is a schematic view of the construction of the time delay weight of FIG. 1;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 11. an electromagnet main body; 12. a coil; 21. a movable iron core; 22. bumping the block; 31. a reset spring; 41. time-delay counterweight; 42. sinking a groove; 43. a countersunk hole; 44. punching a screw; 51. and (4) screws.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the opening electromagnet of the spring operating mechanism of the present invention:
as shown in fig. 1 and 2, the opening electromagnet of the spring operating mechanism is an opening electromagnet used by a spring operating mechanism in a vacuum circuit breaker, and includes an electromagnet main body 11, a movable iron core 21, a return spring 31 and a delay counterweight 41, and is formed by modifying an existing opening electromagnet, specifically, a spring seat at the rear end of the original movable iron core 21 is removed, and the delay counterweight 41 is replaced.
The electromagnet body 11 can adopt a structure in the prior art, a coil 12 is arranged inside the electromagnet body, and a movable iron core 21 is arranged in the coil 12 in a penetrating way. The front end of the movable iron core 21 penetrates out of the electromagnet main body 11, and a collision block 22 is fixed on the penetrating part and is used for extending forwards under the driving of the coil 12 to impact a brake separating buckle plate of the operating mechanism, so that the brake separating action of the operating mechanism is realized, and an arc extinguish chamber is driven to complete the brake separating of the circuit breaker.
As shown in fig. 3, the time delay weight 41 has a disk-shaped structure, and a countersunk groove 42 is formed on the front side surface thereof, a countersunk hole 43 is formed on the rear side surface thereof, the countersunk groove 42 is used for inserting the rear end of the movable iron core 21, and the countersunk hole 43 is used for sinking the head of the screw 51. The center of the sinking groove 42 is provided with a screw through hole 44 for fixing the delay weight 41 on the rear end surface of the movable iron core 21 through a screw 51. The reset spring 31 is a circuit breaker of an existing opening electromagnet, in order to ensure that the working length of the reset spring 31 is the same as that before the delay counterweight 41 is added, the inner diameter of the sunken groove 42 is larger than the outer diameter of the reset spring 31, the bottom wall of the sunken groove 42 is flush with the rear end face of the movable iron core 21, and the end of the reset spring 31 enters to support the reset spring 31 to form a spring stop face to replace a spring seat of the existing opening electromagnet.
When the brake-separating electromagnet is used, firstly, the electromagnetic force required by the brake-separating electromagnet to impact a brake-separating buckle is determined, the brake-separating time is tested on the basis of the electromagnetic force, the brake-separating time is controlled through the delay counter weight 41 with corresponding mass, and the electromagnetic force is properly increased by changing the number of turns of the coil 12, so that a certain brake-separating time, such as 3-5ms time, is prolonged under the condition of ensuring the stable brake-separating of low voltage, and the brake-separating time of the circuit breaker is ensured to be more than 20 ms. In addition, the spring stop surface is flush with the rear end face of the movable iron core 21, the working length of the original reset spring 31 is not affected, the overall length of the opening electromagnet is not obviously increased, so that the interference with a panel is avoided, the movement space of the reset spring 31 is reserved, the stroke of the opening electromagnet is ensured, and the delay block has enough quality due to the fact that the delay counterweight 41 is provided with the sinking groove 42. Simultaneously, above-mentioned structure can conveniently reform transform the separating brake electro-magnet that the separating brake performance demand is different. The electromagnetic force is properly increased by changing the number of turns of the coil 12, so that the opening electromagnet can meet the most basic opening requirement. Although the magnetic force is increased to make the opening easier, the standard that 30% of rated opening voltage cannot be opened is failed and the opening time is too short due to the excessively large increase of the electromagnetic force, which is not beneficial to arc extinction, so that the operation requirement of the opening electromagnet can be more easily met due to the increase of the number of turns of the coil and the matched use of the delay counterweight 41, and the opening time and the normal opening action are ensured.
Embodiment 2 of the opening electromagnet of the spring operating mechanism of the invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the delay weight 41 is fixed to the rear end surface of the movable iron core 21 by a screw 51, and in this embodiment, the delay weight 41 is fixed to the rear end surface of the movable iron core 21 by caulking. In other embodiments, the weight of the delay weight 41 can be determined and then welded to the rear end surface of the plunger 21.
Embodiment 3 of the opening electromagnet of the spring operating mechanism of the present invention:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, the delay weight 41 is a disk structure, but in this embodiment, the delay weight includes a substrate, a spring stop surface is formed on a front side surface of the substrate, and bumps are uniformly distributed on the front side surface of the substrate along a circumferential direction. Of course, in other embodiments, the delay weight 41 may be a plate-shaped structure, and the radial dimension of the delay weight may be increased to ensure that the delay weight 41 has a set weight.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110020029.6A CN112927981B (en) | 2021-01-07 | 2021-01-07 | Separating brake electromagnet of spring operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110020029.6A CN112927981B (en) | 2021-01-07 | 2021-01-07 | Separating brake electromagnet of spring operating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112927981A true CN112927981A (en) | 2021-06-08 |
| CN112927981B CN112927981B (en) | 2023-08-08 |
Family
ID=76163150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110020029.6A Active CN112927981B (en) | 2021-01-07 | 2021-01-07 | Separating brake electromagnet of spring operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112927981B (en) |
Citations (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0520974A (en) * | 1991-07-10 | 1993-01-29 | Fuji Electric Co Ltd | Electromagnet device for closing the circuit breaker |
| CN1381855A (en) * | 2002-05-23 | 2002-11-27 | 江苏东源电器集团股份有限公司 | Permanent Magnet Operating Mechanism |
| CN1585050A (en) * | 2003-08-12 | 2005-02-23 | 日本Ae帕瓦株式会社 | Electromagnetic device |
| CN2746507Y (en) * | 2004-11-07 | 2005-12-14 | 浙江日升电器有限公司 | 126 KV single fracture outdoor high-voltage vacuum circuit breaker |
| CN2751432Y (en) * | 2004-10-14 | 2006-01-11 | 刘志平 | Permanent magnet mechanism equipped with under-voltage release |
| CN2831409Y (en) * | 2005-05-26 | 2006-10-25 | 张军 | Permanent-magnet actuating gear of vacuum circuit breaker |
| CN201387819Y (en) * | 2009-03-27 | 2010-01-20 | 李相权 | Electric switch permanent magnet operating mechanism |
| CN201497628U (en) * | 2009-08-06 | 2010-06-02 | 平高集团有限公司 | A direct-acting spring operating mechanism test device |
| CN201975320U (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Permanent-magnet repulsion mechanism |
| CN102184795A (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Fast vacuum circuit breaker used for protecting high-power power electronic converter |
| CN202332708U (en) * | 2011-11-18 | 2012-07-11 | 厦门威尔圣电气实业有限公司 | Electromagnetic coil for triggering unloading of vacuum circuit breaker mechanism |
| CN202339891U (en) * | 2012-01-04 | 2012-07-18 | 康卓彬德电磁技术（苏州）有限公司 | Electromagnetic trip with manual disconnecting device |
| CN202473787U (en) * | 2011-12-23 | 2012-10-03 | 河南瑞特电气有限公司 | Novel permanent-magnet driving device |
| CN202905590U (en) * | 2012-11-08 | 2013-04-24 | 深圳市安普智信电气有限公司 | ANP single coil monostable permanent magnet mechanism |
| CN203250684U (en) * | 2013-05-17 | 2013-10-23 | 虞旭海 | Electromagnetic operation mechanism of vacuum circuit breaker |
| CN103413720A (en) * | 2013-08-06 | 2013-11-27 | 库柏(宁波)电气有限公司 | High-voltage circuit breaker with buffer and balance weight integrated |
| CN203536337U (en) * | 2013-07-18 | 2014-04-09 | 伊顿公司 | Opening-time-controllable release |
| CN203562372U (en) * | 2013-10-29 | 2014-04-23 | 江苏森源电气股份有限公司 | Contactor opening mechanism |
| CN104347310A (en) * | 2014-08-22 | 2015-02-11 | 重庆大学 | Permanent magnet spring mechanism switch of divided conductor power transmission line ice melting device |
| WO2016058548A1 (en) * | 2014-10-16 | 2016-04-21 | 国家电网公司 | Repulsion operation mechanism |
| CN205720572U (en) * | 2016-05-10 | 2016-11-23 | 国网四川省电力公司成都供电公司 | An Electric Displacement Tapping Device for SF6 Density Relay Test Platform |
| CN205911161U (en) * | 2016-06-26 | 2017-01-25 | 苏州市吴中区欣鑫开关配件厂 | High voltage circuit breaker electro -magnet assembly |
| CN205943796U (en) * | 2016-08-25 | 2017-02-08 | 厦门理工学院 | Monostable permanent magnetism mechanism |
| CN107833783A (en) * | 2017-09-21 | 2018-03-23 | 西安交通大学 | The powder operation device and its actuating method of a kind of dc circuit breaker |
| CN207719063U (en) * | 2017-12-27 | 2018-08-10 | 国网湖南省电力有限公司 | Portable beaker emergency tripping device |
| CN108899103A (en) * | 2018-07-06 | 2018-11-27 | 中国核动力研究设计院 | A kind of magnetic force hoisting type control rod drive mechanism electromagnetic structure analogue unit and application |
| CN109585195A (en) * | 2018-12-24 | 2019-04-05 | 昆山瑞普电气有限公司 | Integral type self-latching mechanism with separating brake function |
| CN210200575U (en) * | 2019-10-09 | 2020-03-27 | 江阴江工电器有限公司 | Anti-burning self-protection opening and closing electromagnet |
| CN111710550A (en) * | 2020-05-21 | 2020-09-25 | 深圳供电局有限公司 | Emergency opening device |
-
2021
- 2021-01-07 CN CN202110020029.6A patent/CN112927981B/en active Active
Patent Citations (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0520974A (en) * | 1991-07-10 | 1993-01-29 | Fuji Electric Co Ltd | Electromagnet device for closing the circuit breaker |
| CN1381855A (en) * | 2002-05-23 | 2002-11-27 | 江苏东源电器集团股份有限公司 | Permanent Magnet Operating Mechanism |
| CN1585050A (en) * | 2003-08-12 | 2005-02-23 | 日本Ae帕瓦株式会社 | Electromagnetic device |
| CN2751432Y (en) * | 2004-10-14 | 2006-01-11 | 刘志平 | Permanent magnet mechanism equipped with under-voltage release |
| CN2746507Y (en) * | 2004-11-07 | 2005-12-14 | 浙江日升电器有限公司 | 126 KV single fracture outdoor high-voltage vacuum circuit breaker |
| CN2831409Y (en) * | 2005-05-26 | 2006-10-25 | 张军 | Permanent-magnet actuating gear of vacuum circuit breaker |
| CN201387819Y (en) * | 2009-03-27 | 2010-01-20 | 李相权 | Electric switch permanent magnet operating mechanism |
| CN201497628U (en) * | 2009-08-06 | 2010-06-02 | 平高集团有限公司 | A direct-acting spring operating mechanism test device |
| CN201975320U (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Permanent-magnet repulsion mechanism |
| CN102184795A (en) * | 2011-04-12 | 2011-09-14 | 浙宝开关(杭州)有限公司 | Fast vacuum circuit breaker used for protecting high-power power electronic converter |
| CN202332708U (en) * | 2011-11-18 | 2012-07-11 | 厦门威尔圣电气实业有限公司 | Electromagnetic coil for triggering unloading of vacuum circuit breaker mechanism |
| CN202473787U (en) * | 2011-12-23 | 2012-10-03 | 河南瑞特电气有限公司 | Novel permanent-magnet driving device |
| CN202339891U (en) * | 2012-01-04 | 2012-07-18 | 康卓彬德电磁技术（苏州）有限公司 | Electromagnetic trip with manual disconnecting device |
| CN202905590U (en) * | 2012-11-08 | 2013-04-24 | 深圳市安普智信电气有限公司 | ANP single coil monostable permanent magnet mechanism |
| CN203250684U (en) * | 2013-05-17 | 2013-10-23 | 虞旭海 | Electromagnetic operation mechanism of vacuum circuit breaker |
| CN203536337U (en) * | 2013-07-18 | 2014-04-09 | 伊顿公司 | Opening-time-controllable release |
| CN103413720A (en) * | 2013-08-06 | 2013-11-27 | 库柏(宁波)电气有限公司 | High-voltage circuit breaker with buffer and balance weight integrated |
| CN203562372U (en) * | 2013-10-29 | 2014-04-23 | 江苏森源电气股份有限公司 | Contactor opening mechanism |
| CN104347310A (en) * | 2014-08-22 | 2015-02-11 | 重庆大学 | Permanent magnet spring mechanism switch of divided conductor power transmission line ice melting device |
| WO2016058548A1 (en) * | 2014-10-16 | 2016-04-21 | 国家电网公司 | Repulsion operation mechanism |
| CN205720572U (en) * | 2016-05-10 | 2016-11-23 | 国网四川省电力公司成都供电公司 | An Electric Displacement Tapping Device for SF6 Density Relay Test Platform |
| CN205911161U (en) * | 2016-06-26 | 2017-01-25 | 苏州市吴中区欣鑫开关配件厂 | High voltage circuit breaker electro -magnet assembly |
| CN205943796U (en) * | 2016-08-25 | 2017-02-08 | 厦门理工学院 | Monostable permanent magnetism mechanism |
| CN107833783A (en) * | 2017-09-21 | 2018-03-23 | 西安交通大学 | The powder operation device and its actuating method of a kind of dc circuit breaker |
| CN207719063U (en) * | 2017-12-27 | 2018-08-10 | 国网湖南省电力有限公司 | Portable beaker emergency tripping device |
| CN108899103A (en) * | 2018-07-06 | 2018-11-27 | 中国核动力研究设计院 | A kind of magnetic force hoisting type control rod drive mechanism electromagnetic structure analogue unit and application |
| CN109585195A (en) * | 2018-12-24 | 2019-04-05 | 昆山瑞普电气有限公司 | Integral type self-latching mechanism with separating brake function |
| CN210200575U (en) * | 2019-10-09 | 2020-03-27 | 江阴江工电器有限公司 | Anti-burning self-protection opening and closing electromagnet |
| CN111710550A (en) * | 2020-05-21 | 2020-09-25 | 深圳供电局有限公司 | Emergency opening device |
Non-Patent Citations (1)
| Title |
|---|
| "高压油断路器 上 安装•运行•维护" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112927981B (en) | 2023-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021022822A1 (en) | Anti-short circuit structure of high-capacity relay | |
| JPWO2019181469A1 (en) | Electric circuit breaker | |
| CN103038850A (en) | Electrical contactor | |
| CN108022801A (en) | A kind of magnetic latching relay of safety and stability | |
| US20250095939A1 (en) | Relay | |
| EP4528776A1 (en) | Relay | |
| JPWO2019167103A1 (en) | Electromagnetic actuators, switches and switchgear | |
| JP7786031B2 (en) | relay | |
| CN112927981A (en) | Opening electromagnet of spring operating mechanism | |
| CN114420513A (en) | Flexible quick circuit breaker actuating mechanism | |
| CN112927994A (en) | Control method for opening time of operating mechanism | |
| CN106252175A (en) | Fast mechanical switch combined floodgate bounce-proof mechanism | |
| CN210607095U (en) | A fault current trigger device and vacuum circuit breaker | |
| CN119008324A (en) | Contactor and circuit system | |
| US2732452A (en) | Electric switchgear | |
| US2481431A (en) | Shockproof electromagnetic relay | |
| US12494333B2 (en) | Fault breaking contactor with dynamic air gap mechanism | |
| CN108281332B (en) | An electromagnetic tripping device | |
| RU2269140C1 (en) | Method for testing vacuum switches durability against through short-circuit currents | |
| CN120656890B (en) | Contactor and circuit system of integrated protection switch | |
| CN219979461U (en) | Magnetic latching electromagnetic relay with impact resistance | |
| US20250372328A1 (en) | Dynamic adjustable magnetic yoke assembly for electromechanical switching devices | |
| CN113571377A (en) | High-emission overload fuse recoil electric switch | |
| CN223245500U (en) | Contactor with protection switch and circuit system | |
| CN219267582U (en) | Permanent magnet quick-release mechanism |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |