CN102280304A - Moving contact assembly and intelligent electromagnetic isolation driving switch applying same - Google Patents
Moving contact assembly and intelligent electromagnetic isolation driving switch applying same Download PDFInfo
- Publication number
- CN102280304A CN102280304A CN2011101646192A CN201110164619A CN102280304A CN 102280304 A CN102280304 A CN 102280304A CN 2011101646192 A CN2011101646192 A CN 2011101646192A CN 201110164619 A CN201110164619 A CN 201110164619A CN 102280304 A CN102280304 A CN 102280304A
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- China
- Prior art keywords
- moving contact
- permanent
- insulation cavity
- moving
- iron core
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Classifications
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- 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
- H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
-
- 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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- 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
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
本发明公开了一种应用动触头组件的电磁隔离驱动智能开关，包括触头组件、绝缘腔体、动触头、绝缘支撑件和电极连杆，动触头设置在所述绝缘腔体内部，绝缘支撑件的外壁固定在绝缘腔体的内壁上，电极连杆固定在绝缘腔体的端部；动触头组件包括分合闸线圈、动铁芯和两个永久磁钢，动触头的一个端部和电极连杆电连接，动铁芯固定在动触头的上，分合闸线圈设置在绝缘腔体的外壁上。本发明还公开了一种应用动触头组件的电磁隔离驱动智能开关。
The invention discloses an electromagnetically isolated drive intelligent switch using a moving contact assembly, comprising a contact assembly, an insulating cavity, a moving contact, an insulating support and an electrode connecting rod, and the moving contact is arranged inside the insulating cavity , the outer wall of the insulating support is fixed on the inner wall of the insulating cavity, and the electrode connecting rod is fixed at the end of the insulating cavity; the moving contact assembly includes the opening and closing coil, the moving iron core and two permanent magnets, the moving contact One end of the pole is electrically connected with the electrode connecting rod, the moving iron core is fixed on the moving contact, and the opening and closing coils are arranged on the outer wall of the insulating cavity. The invention also discloses an electromagnetic isolation driven intelligent switch using a moving contact assembly.
Description
Technical field
The present invention relates to a kind of electrical circuitry equipment technology, specifically, the electromagnetic isolation that relates to a kind of moving contact component and application moving contact component thereof drives intelligent switch.
Background technology
The effect of switch is to cut off and the connection circuit, and the disengagement failure circuit.Vacuum switch because of its arc-extinguishing medium and arc extinguishing after the dielectric in contact gap all be that high vacuum is gained the name, its have volume little, in light weight, be applicable to advantages such as frequent operation, arc control device need not overhaul, in power distribution network, use comparatively universal.Vacuum circuit-breaker mainly comprises three parts: vacuum interrupter (vacuum bubbles), electromagnetism or spring operating mechanism, support and drive system thereof.
Vacuum switch has many mechanical parameters, as closing speed, opening velocity, contact travel, contact closing rebound time, contact separating brake bounce-back amplitude etc.Existing vacuum switch is mainly used in below the 35KV, and 110KV and above circuit breaker are because a lot of problems appear in the stroke lengthening, and Mechanical Reliability and mechanical endurance are very good not enough.
Summary of the invention
Technical problem solved by the invention provides a kind of moving contact component, has improved transmission efficiency and reliability.
Technical scheme is as follows:
A kind of moving contact component is used to realize the separating brake or the combined floodgate of switch or moving contact of breaker, comprises moving iron core, two permanent-magnet steels and divide-shut brake coil; Described moving iron core is between described two permanent-magnet steels, described moving iron core is fixed on the described moving contact, described permanent-magnet steel middle part has first through hole, and described moving contact is sleeved in described first through hole, and described divide-shut brake coil is arranged on the outer wall of insulation cavity.
Further: the inwall of described insulation cavity is provided with insulated support, and described permanent-magnet steel is fixed on the described insulated support.
Further: it is indoor that described moving iron core and permanent-magnet steel are arranged on the mechanism that described insulation cavity isolates, described mechanism chamber interior vacuum.
Another technical problem solved by the invention provides a kind of electromagnetic isolation of using moving contact component and drives intelligent switch, has improved transmission efficiency and reliability.
Technical scheme is as follows:
A kind of electromagnetic isolation of using moving contact component drives intelligent switch, comprise the insulation cavity, moving contact, insulated support and electrode tie rod, described moving contact is arranged on described insulation inside cavity, the outer wall of described insulated support is fixed on the inwall of described insulation cavity, described electrode tie rod is fixed on the end of described insulation cavity, also comprise moving contact component, described moving contact component comprises the divide-shut brake coil, moving iron core and two permanent-magnet steels, described moving iron core and two permanent-magnet steels are arranged on the inside of described insulation cavity, and described permanent-magnet steel is fixed on the described insulated support; Described permanent-magnet steel has first through hole, and described moving contact is sleeved on described first through hole, and an end of described moving contact and described electrode tie rod are electrically connected; Described moving iron core is arranged between two blocks of described permanent-magnet steels, described moving iron core be fixed on described moving contact on; Described divide-shut brake coil is arranged on the outer wall of insulation cavity.
Further: described insulation cavity is provided with two groups of moving contact components.
Further: the outer side edges of described permanent-magnet steel is along being fixed on the described insulated support.
Further: described insulation inside cavity is provided with plum blossom connector and copper strutting piece, described electrode tie rod is provided with annular projection, on the fixing described annular projection of described plum blossom connector, described plum blossom connector has third through-hole, described moving contact is sleeved on the described third through-hole, and described moving contact and described plum blossom connector are electrically connected; Described copper strutting piece is between described plum blossom connector and described permanent-magnet steel, the outer side edges of described copper strutting piece is along being fixed on the described insulated support, described copper strutting piece has second through hole, described moving contact is sleeved on described second through hole, and another end of described moving contact extends to the outside of described copper strutting piece.
Further: the outer wall of described insulation cavity is provided with solid insulation, and described solid insulation has groove in the position corresponding to described permanent-magnet steel, and described divide-shut brake coil stationary is in described groove.
Further: the inner vacuum of described insulation cavity, the arranged outside of described permanent-magnet steel has bellows, and described bellows is provided with fourth hole, and described moving contact is sleeved on the described fourth hole; Described bellows is divided into arc control device and mechanism chamber with the inner space of described insulation cavity, and it is indoor that described moving iron core and permanent-magnet steel are arranged on described mechanism.
Further: described arc control device are provided with radome, and described radome is fixed on the inwall of described insulation cavity, and the stroke of the length of described radome and two moving contacts adapts.
Technique effect comprises:
1, in the prior art, because operating mechanism in the vacuum extinction outdoor, is opening a sluice gate or closing a floodgate by machine driven system driving switch contact; Among the present invention, operating mechanism directly is connected with vacuum interrupter, the insulated cavity that is encapsulated in an integral body is external, and drive coil is in the insulation cavity, with the moving component electrical isolation, omitted machine driven system, improved transmission efficiency, reduced component number, complete machine is not only simple in structure, and reliability improves the minimizing of metal material use amount greatly.
2, with respect to Mechanical Driven, the present invention has omitted drive system, and moving-mass reduces greatly, thus the present invention make operating mechanism open a sluice gate/closing speed is fast.
3, among the present invention, the divide-shut brake coil is arranged on the insulated cavity external body, efficiently solves Insulation Problems, can effectively solve the big problem of action equipment volume simultaneously.
Description of drawings
Fig. 1 is the structural representation that electromagnetic isolation drives intelligent switch among the present invention;
Fig. 2 is the state diagram of moving contact when "on" position among the present invention.
Embodiment
Below with reference to accompanying drawing and preferred embodiment technical solution of the present invention is described in detail.
Moving contact component among the present invention can be widely used in various circuit breaker and switches with moving contact, can effectively reduce equipment volume.The structure of moving contact component comprises: moving iron core, permanent-magnet steel, divide-shut brake coil; Wherein, moving iron core is fixed on the moving contact, is used to drive moving contact and opens a sluice gate or close a floodgate; Is provided with through hole in the middle of the permanent-magnet steel, moving contact is sleeved in this through hole, and permanent-magnet steel is fixed on the inwall of insulation cavity, perhaps is fixed on the insulated support of inwall of insulation cavity; The divide-shut brake coil is arranged on the outside of insulation cavity, is used for providing electromagnetic field to moving iron core.
Drive intelligent switch below with reference to the preferred embodiment electromagnetic isolation, should be used as detailed description technical solution of the present invention.
As shown in Figure 1, be the structure chart that electromagnetic isolation drives intelligent switch among the present invention.The structure that electromagnetic isolation drives intelligent switch comprises: electrode tie rod 1, moving contact 2, plum blossom connector 3, moving iron core 4, permanent-magnet steel 5, radome 6, insulation cavity 7, insulated support 8, copper strutting piece 9, divide-shut brake coil 10, solid insulation 11 and bellows 12.Because electromagnetic isolation drives intelligent switch and is provided with two moving contacts 2, so two unit are symmetrical about electromagnetic isolation driving intelligent switch, electrode tie rod 1, moving contact 2, plum blossom connector 3, moving iron core 4, permanent-magnet steel 5, radome 6, insulated support 8, copper strutting piece 9, divide-shut brake coil 10, solid insulation 11 and bellows 12 be separately positioned on insulation cavity 7 about two unit, each unit comprises one group.To the insulate inner space of cavity 7 of bellows 12 is isolated into arc control device 14 and mechanism chamber 13.Arc control device 14 are positioned at the middle part of insulation cavity 7, and mechanism chamber 13 is positioned at arc control device 14 both sides, and moving iron core 4, permanent-magnet steel 5 are arranged in the mechanism chamber 13.
The inside of insulation cavity 7 vacuumizes, and two electrode tie rods 1 are separately fixed at the two ends of insulation cavity 7, and electrode tie rod 1 is provided with annular projection, forms a pit at the middle part of annular projection, and insulated support 8 is arranged on the inwall of insulation cavity 7; Moving contact 2 is arranged on the inside of insulation cavity 7, and when moving contact 2 is in when opening a sluice gate state, the end and the electrode tie rod 1 of moving contact 2 contact, and pushes up in the pit in the middle of the electrode tie rod 1; Plum blossom connector 3 is fixed on the annular projection of electrode tie rod 1, plum blossom connector 3 at one end has through hole, and moving contact 2 is sleeved on this through hole, no matter at the state of opening a sluice gate or in "on" position, moving contact 2 is realized being electrically connected with plum blossom connector 3 all the time, is in conducting state; Copper strutting piece 9 is between plum blossom connector 3 and permanent-magnet steel 5, and the outer side edges of copper strutting piece 9 is along being fixed on the insulated support 8, and the centre of copper strutting piece 9 has through hole, and moving contact 2 is sleeved on this through hole, and another end of moving contact 2 is positioned at arc control device 14; Two blocks of permanent-magnet steels 5 are arranged in the mechanism chamber 13, and the outer side edges of permanent-magnet steel 5 is along being fixed on the insulated support 8, and the centre of permanent-magnet steel 5 has through hole, and moving contact 2 is sleeved on this through hole; Moving iron core 4 is arranged between two blocks of permanent-magnet steels 5, and moving iron core 4 is fixed on the outer wall of moving contact 2; Solid insulation 11 is provided with on the outer wall of insulation cavity 7, and solid insulation 11 has groove in the position corresponding to permanent-magnet steel 5, and divide-shut brake coil 10 is arranged in this groove; Radome 6 is arranged on arc control device 14, and radome 6 is fixed on the inwall of insulation cavity 7, and the stroke of the length of radome 6 and two moving contacts 2 adapts; To the insulate inner space of cavity 7 of bellows 12 is divided into mechanism chamber 13 and arc control device 14, and bellows 12 has through hole, and moving contact 2 is sleeved in this through hole, because mechanism chamber 13 is different with the vacuum degree of arc control device 14, and 12 buffer actions of bellows.
As shown in Figure 2, be the state diagram of moving contact when "on" position among the present invention.The N utmost point of two blocks of permanent-magnet steels 5 is relative with the S utmost point, and when being in when opening a sluice gate state, moving iron core 4 is adsorbed near on the permanent-magnet steel 5 of electrode tie rod 1 one sides.
When needs closed a floodgate, divide-shut brake coil 10 energising also formed magnetic field, and this magnetic field gives 4 one of moving iron cores to reciprocal power, and when being in "on" position, moving iron core 4 is adsorbed on the permanent-magnet steel 5 away from electrode tie rod 1 one sides.
In addition, utilize the principle of the invention, electromagnetic isolation drives intelligent switch can be designed to a moving contact 2 and a fixed contact, only need to keep a moving contact component and get final product, perhaps, can be arranged to the two drivings of two contacts, also can be arranged to an end contact and fix, the structure that an end contact drives.Insulation cavity 7 inside can vacuumize, fill with low pressure SF6 gas, high-purity N 2 or SF6 mist as dielectric.
Claims (10)
1. moving contact component is used to realize it is characterized in that the separating brake or the combined floodgate of switch or moving contact of breaker: comprise moving iron core, two permanent-magnet steels and divide-shut brake coil; Described moving iron core is between described two permanent-magnet steels, described moving iron core is fixed on the described moving contact, described permanent-magnet steel middle part has first through hole, and described moving contact is sleeved in described first through hole, and described divide-shut brake coil is arranged on the outer wall of insulation cavity.
2. moving contact component as claimed in claim 1 is characterized in that: the inwall of described insulation cavity is provided with insulated support, and described permanent-magnet steel is fixed on the described insulated support.
3. moving contact component as claimed in claim 1 is characterized in that: it is indoor that described moving iron core and permanent-magnet steel are arranged on the mechanism that described insulation cavity isolates, described mechanism chamber interior vacuum.
4. an electromagnetic isolation of using moving contact component drives intelligent switch, comprise the insulation cavity, moving contact, insulated support and electrode tie rod, described moving contact is arranged on described insulation inside cavity, the outer wall of described insulated support is fixed on the inwall of described insulation cavity, described electrode tie rod is fixed on the end of described insulation cavity, it is characterized in that: also comprise moving contact component, described moving contact component comprises the divide-shut brake coil, moving iron core and two permanent-magnet steels, described moving iron core and two permanent-magnet steels are arranged on the inside of described insulation cavity, and described permanent-magnet steel is fixed on the described insulated support; Described permanent-magnet steel has first through hole, and described moving contact is sleeved on described first through hole, and an end of described moving contact and described electrode tie rod are electrically connected; Described moving iron core is arranged between two blocks of described permanent-magnet steels, described moving iron core be fixed on described moving contact on; Described divide-shut brake coil is arranged on the outer wall of insulation cavity.
5. the electromagnetic isolation of application moving contact component as claimed in claim 1 drives intelligent switch, and it is characterized in that: described insulation cavity is provided with two groups of moving contact components.
6. the electromagnetic isolation of application moving contact component as claimed in claim 1 drives intelligent switch, it is characterized in that: the outer side edges of described permanent-magnet steel is along being fixed on the described insulated support.
7. the electromagnetic isolation as each described application moving contact component of claim 4 to 6 drives intelligent switch, it is characterized in that: described insulation inside cavity is provided with plum blossom connector and copper strutting piece, described electrode tie rod is provided with annular projection, on the fixing described annular projection of described plum blossom connector, described plum blossom connector has third through-hole, described moving contact is sleeved on the described third through-hole, and described moving contact and described plum blossom connector are electrically connected; Described copper strutting piece is between described plum blossom connector and described permanent-magnet steel, the outer side edges of described copper strutting piece is along being fixed on the described insulated support, described copper strutting piece has second through hole, described moving contact is sleeved on described second through hole, and another end of described moving contact extends to the outside of described copper strutting piece.
8. the electromagnetic isolation of application moving contact component as claimed in claim 7 drives intelligent switch, it is characterized in that: the outer wall of described insulation cavity is provided with solid insulation, described solid insulation has groove in the position corresponding to described permanent-magnet steel, and described divide-shut brake coil stationary is in described groove.
9. the electromagnetic isolation of application moving contact component as claimed in claim 7 drives intelligent switch, it is characterized in that: the inner vacuum of described insulation cavity, the arranged outside of described permanent-magnet steel has bellows, and described bellows is provided with fourth hole, and described moving contact is sleeved on the described fourth hole; Described bellows is divided into arc control device and mechanism chamber with the inner space of described insulation cavity, and it is indoor that described moving iron core and permanent-magnet steel are arranged on described mechanism.
10. the electromagnetic isolation of application moving contact component as claimed in claim 9 drives intelligent switch, it is characterized in that: described arc control device are provided with radome, described radome is fixed on the inwall of described insulation cavity, and the stroke of the length of described radome and two moving contacts adapts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101646192A CN102280304B (en) | 2011-06-17 | 2011-06-17 | Moving contact assembly and its application Electromagnetic isolation driving intelligent switch of moving contact assembly |
| PCT/CN2011/076344 WO2012171233A1 (en) | 2011-06-17 | 2011-06-24 | Moving contact component and electromagnetic isolation driving intelligent switch using moving contact component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101646192A CN102280304B (en) | 2011-06-17 | 2011-06-17 | Moving contact assembly and its application Electromagnetic isolation driving intelligent switch of moving contact assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102280304A true CN102280304A (en) | 2011-12-14 |
| CN102280304B CN102280304B (en) | 2013-11-27 |
Family
ID=45105691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101646192A Expired - Fee Related CN102280304B (en) | 2011-06-17 | 2011-06-17 | Moving contact assembly and its application Electromagnetic isolation driving intelligent switch of moving contact assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102280304B (en) |
| WO (1) | WO2012171233A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730274A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Double-moving-contact switch device |
| CN103730273A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Double-acting power switch |
| CN105428146A (en) * | 2015-12-24 | 2016-03-23 | 上海固缘电力科技有限公司 | Solid insulation permanent magnet vacuum circuit breaker |
| CN105551876A (en) * | 2016-02-03 | 2016-05-04 | 中国电力科学研究院 | All-insulated outdoor vacuum switch based on dual-cavity vacuum arc extinguishing chamber |
| CN105655194A (en) * | 2014-12-02 | 2016-06-08 | 沈阳工业大学 | Double-acting vacuum arc-extinguishing chamber with permanent magnetic mechanism |
| CN105719895A (en) * | 2014-12-02 | 2016-06-29 | 沈阳工业大学 | Vacuum arc-extinguishing chamber of novel double-acting mechanism |
| CN108010755A (en) * | 2017-12-08 | 2018-05-08 | 资红艳 | A kind of crowbar switch |
| CN109036944A (en) * | 2018-08-20 | 2018-12-18 | 厦门大恒科技有限公司 | Miniature vacuum contact mechanism and vacuum contact miniature circuit breaker |
| CN110246392A (en) * | 2019-07-04 | 2019-09-17 | 铜仁职业技术学院 | A kind of vocational education practice teaching checking device |
| CN112201494A (en) * | 2019-07-08 | 2021-01-08 | 保定钰鑫电气科技有限公司 | On-off mechanism of quick switch and quick switch |
| CN115172093A (en) * | 2022-09-08 | 2022-10-11 | 宁波天安智能电网科技股份有限公司 | Electromagnetic ejection quick switch device |
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| CN202094043U (en) * | 2011-06-17 | 2011-12-28 | 孟越峰 | Moving contact assembly and electromagnetic isolation driving intelligent switch using same |
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| FR2726396B1 (en) * | 1994-10-31 | 1996-12-13 | Schneider Electric Sa | ELECTRIC VACUUM SWITCH |
| JP2002033034A (en) * | 2000-07-13 | 2002-01-31 | Hitachi Ltd | Switchgear and system switching device using the same |
| CN2570964Y (en) * | 2002-09-19 | 2003-09-03 | 曹剑 | Vacuum circuit breaker operating device |
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- 2011-06-17 CN CN2011101646192A patent/CN102280304B/en not_active Expired - Fee Related
- 2011-06-24 WO PCT/CN2011/076344 patent/WO2012171233A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1349235A (en) * | 2000-10-16 | 2002-05-15 | 三菱电机株式会社 | Switch device |
| JP2002329444A (en) * | 2001-05-01 | 2002-11-15 | Mitsubishi Electric Corp | Solid insulated switchgear |
| CN200944371Y (en) * | 2006-07-07 | 2007-09-05 | 耐吉科技股份有限公司 | Double-lift vacuum extinction chamber |
| CN101901718A (en) * | 2010-07-27 | 2010-12-01 | 国网电力科学研究院 | Direct acting vacuum circuit breaker with bistable permanent magnet operating mechanism |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730274A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Double-moving-contact switch device |
| CN103730273A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Double-acting power switch |
| CN105655194A (en) * | 2014-12-02 | 2016-06-08 | 沈阳工业大学 | Double-acting vacuum arc-extinguishing chamber with permanent magnetic mechanism |
| CN105719895A (en) * | 2014-12-02 | 2016-06-29 | 沈阳工业大学 | Vacuum arc-extinguishing chamber of novel double-acting mechanism |
| CN105428146A (en) * | 2015-12-24 | 2016-03-23 | 上海固缘电力科技有限公司 | Solid insulation permanent magnet vacuum circuit breaker |
| CN105551876A (en) * | 2016-02-03 | 2016-05-04 | 中国电力科学研究院 | All-insulated outdoor vacuum switch based on dual-cavity vacuum arc extinguishing chamber |
| CN108010755A (en) * | 2017-12-08 | 2018-05-08 | 资红艳 | A kind of crowbar switch |
| CN109036944A (en) * | 2018-08-20 | 2018-12-18 | 厦门大恒科技有限公司 | Miniature vacuum contact mechanism and vacuum contact miniature circuit breaker |
| CN109036944B (en) * | 2018-08-20 | 2024-04-02 | 厦门大恒科技有限公司 | Miniature vacuum contact head mechanism and vacuum contact miniature circuit breaker |
| CN110246392A (en) * | 2019-07-04 | 2019-09-17 | 铜仁职业技术学院 | A kind of vocational education practice teaching checking device |
| CN110246392B (en) * | 2019-07-04 | 2021-03-23 | 铜仁职业技术学院 | Vocational education teaching training examination device |
| CN112201494A (en) * | 2019-07-08 | 2021-01-08 | 保定钰鑫电气科技有限公司 | On-off mechanism of quick switch and quick switch |
| CN115172093A (en) * | 2022-09-08 | 2022-10-11 | 宁波天安智能电网科技股份有限公司 | Electromagnetic ejection quick switch device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102280304B (en) | 2013-11-27 |
| WO2012171233A1 (en) | 2012-12-20 |
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