CN103325639B - Device containing vacuum circuit-breaker and on-load switch - Google Patents
Device containing vacuum circuit-breaker and on-load switch Download PDFInfo
- Publication number
- CN103325639B CN103325639B CN201310231817.5A CN201310231817A CN103325639B CN 103325639 B CN103325639 B CN 103325639B CN 201310231817 A CN201310231817 A CN 201310231817A CN 103325639 B CN103325639 B CN 103325639B
- Authority
- CN
- China
- Prior art keywords
- pole
- energy storage
- splitting
- transmission axle
- spring
- 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.)
- Active
Links
Abstract
A kind of device containing vacuum circuit-breaker and on-load switch, the volume solving prior art is large, power supply continuity is poor and the problem such as SF6 gaseous contamination environment, comprise pole and the operating mechanism of small modular, its technical essential is: pole comprises the vacuum interrupter be encapsulated in casing insulation chamber, watch chain fingertip Connection Block, fixed contact, conduction are flexible coupling and insulated tension pole, operating mechanism comprises pole installing rack and parts Standardization degree is high, handling are changed and are easy to mechanism body, by adjusting energy storage motor or dividing, making electromagnet, energy pre-storage divides, the parts such as closing pawl and replacing vacuum interrupter, can realize manually, electric operating, to complete point, the conversion of closing a floodgate, the conversion of circuit breaker and on-load switch, its compact conformation, reasonable in design, dielectric strength is high, interchangeability is good, be convenient to in-site installation, debugging, there is dividing of different drop-out current, combined floodgate ability, quick and stable can be realized divide, close a floodgate, safe and reliable, significant prolongation useful life.
Description
Technical field
The present invention relates to a kind of unit for solid-state insulated switchgear, particularly one is applicable to 12 ~ 24Kv, and the small modular solid insulation in 50Hz three-phase alternating current electrical network contains the device of vacuum circuit-breaker and on-load switch.Mainly be suitable for the solid insulation ring main unit solid compositions unit of composition module.
Background technology
At present, in the solid insulation ring main unit of urban architecture, market, public utilities, airport, railway, traffic, coal, chemical industry, iron and steel, industrial and mining enterprises and the three-phase alternating current electrical network such as power regulation station and power plant, vacuum circuit-breaker obtains a wide range of applications.Existing vacuum circuit-breaker can be divided into by dielectric: air, inflation and solid insulation.Air-insulated switchgear once each electric elements and galvanic circle leaks in atmosphere cruelly, and volume is large and resistance to environment is poor, is applicable to general running environment.The each electric elements of gas filling circuit breaker and galvanic circle are enclosed in sulphur hexafluoride (SF6) gas, and volume is little, and insulation level is high, and environment is excellent, are applicable to require higher operational site, as track traffic, and skyscraper etc.But SF6 gas is one of greenhouse gas that " Kyoto Protocol " is clear and definite, very big to environmental impact, limit use.In recent years, advanced technology country was all proposed various forms of middle pressure solid insulated switchgear.In arc extinguishing fracture, all select vacuum interrupter.But existing solid insulated switchgear, when its pole is installed, or be unlimited, or be bad sealing, once its insulating surface is by the pollution such as foreign matter and moisture, will leak electricity even short circuit accident, jeopardizes security of operation.If publication No. is " solid isolated vacuum ring main unit " that CN102664363A records, the structure of employing standard electric cable end, standard silicone rubbers dry type bus is arranged on the vacuum switch unit in cabinet; On the cable plug that standard electric cable end, standard silicone rubbers dry type bus are arranged on pole respectively and bus plug.Three station vacuum arc extinguish chambers adopted, himself have combined floodgate, separating brake isolation, ground connection totally three service positions, simplify the structure of switch; Although its all electrified body is all poured into a mould or is arranged in epoxy resin, the impact of external environment condition on the electric property of ring main unit can not be subject to, decrease the maintenance of equipment, extend useful life, but, owing to adopting vacuum interrupter to do isolating switch, its fracture is invisible, once there is mechanical breakdown or vacuum interrupter gas leakage, to personal safety be jeopardized, and not meet standard-required.Its vacuum interrupter horizontal positioned, porcelain shell, by Lateral Force, easily breaks, and operation insulator fairlead frictional resistance is large.There is blow-by or poorly sealed problem in circuit breaker inlet wire.As " indoor high-voltage vacuum circuit breaker, isolation and earthed switch combined electrical apparatus " that notification number is CN202230967U, disclosed complex structure, in practical operation, be difficult to control to center, and isolating switch is simple air insulation, there is no solid insulation, do not possess rapid closing function, not there is the ability closing short circuit current.
Summary of the invention
The object of this invention is to provide a kind of device containing vacuum circuit-breaker and on-load switch of small modular solid insulation, solve that the volume that existing circuit breaker and on-load switch exist is large, power supply continuity is poor and the problem such as SF6 gaseous contamination environment, its compact conformation, reasonable in design, parts easily realize small modular, dielectric strength is high, interchangeability is good, be convenient to in-site installation, debugging, have different drop-out current point, combined floodgate ability, quick and stable can be realized divide, close a floodgate, safe and reliable, significant prolongation useful life.
The technical solution adopted in the present invention is: should comprise pole and operating mechanism by the device containing vacuum circuit-breaker and on-load switch, its technical essential is: described pole and operating mechanism all adopt small modular structure, all insulation modularization pole comprises the insulation crust adopting epoxy resin to make, be encapsulated in the output static contact seat of the vacuum interrupter in casing insulation chamber, leading-out terminal watch chain fingertip Connection Block and installation fixed contact, conduction is flexible coupling and insulated tension pole; The connecting flange structure of the left and right leading-out terminal of pole watch chain fingertip Connection Block is identical, and the leading-out terminal flange installing the output static contact seat of fixed contact is identical with the connecting flange structure of the upper and lower leading-out terminal of three station isolation grounding switch poles; Small multifunctional operation mechanism comprises the pole installing rack and the mechanism body that are assembled with transmission axle and export connection rod set, the cleat frame of mechanism body is fitted together by output connection rod set support and pole installing rack, realizing the empty sky that closes divides the energy storage closing spring of operation and sluice separating spring to be positioned at same cleat frame, the transmission axle connecting lever being fixed on transmission axle end utilize connecting rod and output shaft connecting lever hinged, the output shaft connecting lever other end connects energy storage sluice separating spring; Coaxial fixing minor sprocket and ratchet on auto-manual integrated energy storage motor shaft, minor sprocket connects hinge wheel by chain, and the pull bar of the cam assembly coaxially assembled with hinge wheel is connected energy storage closing spring by double strand chain; While splitting or integrating lock electromagnet or splitting or integrating lock button promote the rotation of splitting or integrating lock semiaxis respectively, the sincere son of splitting or integrating lock of padlock energy storage splitting or integrating brake spring is driven to thread off, the splitting or integrating brake spring released energy drives output shaft rotation respectively, while output shaft rotation, drive and rotated by connecting rod and the hinged transmission axle of transmission axle connecting lever, transmission axle drives and exports the splitting or integrating lock operation that connection rod set realizes circuit breaker and on-load switch.
The outer surface of outer cover spray metal enamelled coating of described pole or semi-conductive layer, and direct ground connection.
Described mechanism body comprises cleat frame, is assembled in the auto-manual integrated energy storage motor in cleat frame, output shaft and connecting lever, cam assembly, chain wheel assembly, point, combined floodgate spring, point, combined floodgate semiaxis, point, closing pawl, point, making electromagnet, point, switch knob, ratchet and pawl.
The advantage that the present invention has and good effect are: because the present invention adopts pole and the operating mechanism of overall small modular structure, the insulation crust that all insulation modularization pole adopts epoxy resin to make, vacuum interrupter is encapsulated in pole, so its compact conformation, reasonable in design, dielectric strength is high.Because the connecting flange structure of the left and right leading-out terminal of the watch chain fingertip Connection Block of pole is identical, the leading-out terminal flange installing the output static contact seat of fixed contact is identical with the connecting flange structure of the upper and lower leading-out terminal of three station isolation grounding switch poles.The adpting flange that this general interchangeability is stronger, is conducive to adopting silicone rubber seal, carries out bolt connection, thus to coordinate between cabinet connection bus and realize hermetically sealed connection with three station isolation grounding switchs.Above-mentioned all insulation modularization pole can be according to actual needs, with three station isolation grounding switch leading-out terminal Flange joint, kinds of schemes combination in any, the upper isolated form assembled unit of circuit breaker under isolating switch on composition, or the lower isolated form assembled unit of isolating switch under the upper circuit breaker of composition, modularization is installed, and reduces installation difficulty, is convenient to in-site installation, debugging.The energy storage closing spring of mechanism body and sluice separating spring are positioned at same cleat frame, can realize empty closing empty point of operation, significant prolongation useful life.Because of the transmission axle connecting lever being fixed on transmission axle end utilize connecting rod and output shaft connecting lever hinged, the output shaft connecting lever other end connects energy storage sluice separating spring, coaxial fixing minor sprocket and ratchet on auto-manual integrated energy storage motor shaft, minor sprocket connects hinge wheel by chain, the pull bar of the cam assembly coaxially assembled with hinge wheel is connected energy storage closing spring by double strand chain, as long as replacing combined floodgate spring and sluice separating spring just can realize the combined floodgate merit of different drop-out current.Therefore, the mechanism body parts Standardization degree of this operating mechanism is high, handling are changed easily, only need adjustment auto-manual integrated energy storage motor or point, making electromagnet, energy pre-storage divide, closing pawl and change the parts such as vacuum interrupter, just can realize manual, electric operating, the conversion completing point, close a floodgate, the conversion of circuit breaker and on-load switch, its handling safety is reliable.In addition, pole shell also can spray electro-conductive lacquer layer or semi-conductive layer, and reliable ground, tangible, effectively protect the personal safety of operation and maintenance personal.
In sum, the present invention really achieves full-insulated full-sealed small modular solid insulated vacuum circuit breaker and on-load switch, solves that the volume that existing circuit breaker exists is large, power supply continuity is poor and the problem such as SF6 gaseous contamination environment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the end view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the cutaway view of Fig. 3 along A-A line;
Fig. 5 is the cutaway view of Fig. 3 along B-B line;
Fig. 6 is the cutaway view of Fig. 3 along C-C line.
In figure, sequence number illustrates: 1 pole installing rack, 2 transmission axles, 3 transmission axle connecting levers, 4 connecting rods, 5 output shafts, 6 opening button, 7 separating brake semiaxis, 8 cleat frame, 9 auto-manual integrated energy storage motors, 10 combined floodgate semiaxis, 11 switch knobs, 12 making electromagnets, 13 cam assemblies, 14 export connection rod set support, 15 export connection rod set, 16 oil buffers, 17 poles, 18 output shaft connecting levers, the sincere son of 19 separating brake, 20 sluice separating springs, 21 ratchets, 22 ratchets, 23 closing pawls, 24 combined floodgate springs, 25 directive wheels, 26 double strand chains, 27 tripping electromagnets, 28 minor sprockets, 29 chains, 30 hinge wheels, 31 insulated tension poles, 32 conductions are flexible coupling, 33 shells, 34 watch chain fingertip Connection Blocks, 35 vacuum interrupters, 36 fixed contacts.
Embodiment
Concrete structure of the present invention is described in detail according to Fig. 1 ~ 6.Pole 17 and operating mechanism should be comprised by device containing vacuum circuit-breaker and on-load switch.Wherein pole 17 and operating mechanism all adopt small modular structure.The pole 17 of all insulation modular construction adopted comprises the insulation crust 33 adopting epoxy resin to make, be encapsulated in the vacuum interrupter 35 in shell 33 insulated cavity, watch chain fingertip Connection Block 34 and install the output static contact seat of fixed contact 36, conduction is flexible coupling the parts such as 32 and insulated tension pole 31.The connecting flange structure of the left and right leading-out terminal of the watch chain fingertip Connection Block 34 of pole 17 is identical, and the leading-out terminal flange installing the output static contact seat of fixed contact 36 is identical with the connecting flange structure of the upper and lower leading-out terminal of three station isolation grounding switch poles.The insulation crust 33 of pole 17, the equal metal spraying of outer surface belongs to enamelled coating or semi-conductive layer, and direct ground connection.So not only tangible, and injury can not be produced, to improve the security reliability of isolation further to human body.
What operating mechanism adopted is small multifunctional operation mechanism.It comprises and is assembled with transmission axle 2 and exports the parts such as the pole installing rack 1 of connection rod set 15 and mechanism body.Wherein pole installing rack 1 is the fixed part installing pole 17 and mechanism body.Pole installing rack 1 can be designed to different structural styles according to different poles, so that form different vacuum circuit-breakers and on-load switch.Mechanism body comprises cleat frame 8, be assembled in the auto-manual integrated energy storage motor 9 in cleat frame 8, output shaft 5 and output shaft connecting lever 18, the cam assembly 13 be made up of cam, camshaft and pull bar etc., the chain wheel assembly be made up of hinge wheel 30, minor sprocket 28 and chain 29, point, combined floodgate spring 20,24, point, combined floodgate semiaxis 7,10, point, closing pawl 19,23, point, making electromagnet 27,12, point, switch knob 6,11, the parts such as ratchet 21 and ratchet 22.
The cleat frame 8 of mechanism body fits together with pole installing rack 2 by exporting connection rod set support 14.Output shaft 5 is hinged with the transmission axle connecting lever 3 on transmission axle 2 end by connecting rod 4.Transmission axle connecting lever 3 and output connection rod set 15 form linkage and are used for pulling insulated tension pole 31.Energy storage closing spring 24 and sluice separating spring 20 are positioned at same cleat frame 8, can realize empty conjunction and operate empty dividing.The transmission axle connecting lever 3 being fixed on transmission axle 2 end utilizes connecting rod 4 and output shaft connecting lever 18 hinged, and the other end of output shaft connecting lever 18 connects energy storage sluice separating spring 20.Coaxial fixing minor sprocket 28 and ratchet 21 on the axle of auto-manual integrated energy storage motor 9, minor sprocket 28 connects hinge wheel 30 by chain 29, with the pull bar of the coaxial cam assembly 13 assembled of hinge wheel 30, the double strand chain 26 supported by directive wheel 25 connects energy storage closing spring 24.Utilize splitting or integrating lock electromagnet 12,27 or splitting or integrating lock button 11,6 to promote splitting or integrating lock semiaxis 10,7 respectively to rotate, splitting or integrating lock semiaxis 10,7 drives the splitting or integrating lock sincere sub 23,19 of padlock energy storage splitting or integrating brake spring 24,20 to thread off, and splitting or integrating brake spring 24,20 is unclamped and releases energy.The splitting or integrating brake spring 24,20 released energy drives output shaft 5 to rotate respectively, while output shaft 5 rotates, drive and rotated by connecting rod 4 and the hinged transmission axle 2 of transmission axle connecting lever 3, transmission axle 2 drives and exports the splitting or integrating lock operation that connection rod set 15 realizes circuit breaker and on-load switch.
During stored energy operation, auto-manual integrated energy storage motor 9 passes through minor sprocket 28 chain drive-belt 29, drives hinge wheel 30 to rotate, thus drives the cam in cam assembly 13 to rotate, and the pull bar on band moving cam passes through double strand chain 26, directive wheel 25 drawing brake spring 24.After cam assembly 13 turns over dead point, when combined floodgate spring 24 pulls open ultimate range, closing pawl 23 withstands the stopping means on cam, and cam stops operating.Now, the ratchet 22 on hinge wheel 30 lifts, and hinge wheel 30 dallies, and completes energy storage.After energy storage, also control auto-manual integrated energy storage motor 9 by travel switch (not shown), auto-manual integrated energy storage motor 9 is stopped operating.Ratchet 22 and ratchet 21 are the ratchet assemblies making minor sprocket 28 one-directional rotation, can prevent auto-manual integrated electric motor 9 from reversing.
Closing operation carries out after energy storage completes.During combined floodgate, by making electromagnet 12 or promote combined floodgate semiaxis 10 by switch knob 11 and rotate, closing pawl 23 is threaded off, combined floodgate spring 24 pulls cam axle, the roller that knock over cam is positioned on output shaft connecting lever 18 moves, output shaft 5 rotates, by connecting rod 4, the movement of output shaft connecting lever 18, promote transmission axle 2 by connecting rod 4 to rotate, transmission axle 2 presses the pressure insulated tension pole 31 of pole 17 by being fixed on the output connection rod set 15 exported on connection rod set support 14, realize the steady closing operation of vacuum circuit-breaker and on-load switch.Meanwhile, sluice separating spring 20 is compressed, and realizes separating brake energy storage.
During sub-switching operation, promote separating brake semiaxis 7 by separating brake electromagnet 27 or opening button 6 to rotate, after separating brake semiaxis 7 rotates, separating brake sincere sub 19 is threaded off, sluice separating spring 20 promotes output shaft connecting lever 18 and moves, promote transmission axle 2 by connecting rod 4 to rotate, transmission axle 2 pulls the insulated tension pole 31 of pole 17 by being fixed on the output connection rod set 15 exported on connection rod set support 14, pull open the sub-switching operation that vacuum interrupter 35 realizes vacuum circuit-breaker and on-load switch.Oil buffer 16 for vacuum circuit-breaker and on-load switch steady separating brake and prevent resilience.
Claims (1)
1. one kind contains the device of vacuum circuit-breaker and on-load switch, comprise pole and operating mechanism, it is characterized in that: described pole and operating mechanism all adopt small modular structure, all insulation modularization pole comprises the insulation crust adopting epoxy resin to make, outer surface of outer cover spray metal enamelled coating or semi-conductive layer, and direct ground connection, be encapsulated in the output static contact seat of the vacuum interrupter in casing insulation chamber, leading-out terminal watch chain fingertip Connection Block and installation fixed contact, conduction is flexible coupling and insulated tension pole; The connecting flange structure of the left and right leading-out terminal of pole watch chain fingertip Connection Block is identical, and the leading-out terminal flange installing the output static contact seat of fixed contact is identical with the connecting flange structure of the upper and lower leading-out terminal of three station isolation grounding switch poles; Small multifunctional operation mechanism comprises the pole installing rack and the mechanism body that are assembled with transmission axle and export connection rod set, mechanism body comprises cleat frame, is assembled in the auto-manual integrated energy storage motor in cleat frame, output shaft and connecting lever, cam assembly, chain wheel assembly, point, combined floodgate spring, point, combined floodgate semiaxis, point, closing pawl, point, making electromagnet, point, switch knob, ratchet and pawl; The cleat frame of mechanism body is fitted together by output connection rod set support and pole installing rack, realizing the empty sky that closes divides the energy storage closing spring of operation and sluice separating spring to be positioned at same cleat frame, the transmission axle connecting lever being fixed on transmission axle end utilizes one end of connecting rod and output shaft connecting lever hinged, and the output shaft connecting lever other end connects energy storage sluice separating spring; Coaxial fixing minor sprocket and ratchet on auto-manual integrated energy storage motor shaft, minor sprocket connects hinge wheel by chain, and the pull bar of the cam assembly coaxially assembled with hinge wheel is connected energy storage closing spring by double strand chain; While splitting or integrating lock electromagnet or splitting or integrating lock button promote the rotation of splitting or integrating lock semiaxis respectively, the sincere son of splitting or integrating lock of padlock energy storage splitting or integrating brake spring is driven to thread off, the splitting or integrating brake spring released energy drives output shaft rotation respectively, while output shaft rotation, drive and rotated by connecting rod and the hinged transmission axle of transmission axle connecting lever, transmission axle drives and exports the splitting or integrating lock operation that connection rod set realizes circuit breaker or on-load switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310231817.5A CN103325639B (en) | 2013-06-13 | 2013-06-13 | Device containing vacuum circuit-breaker and on-load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310231817.5A CN103325639B (en) | 2013-06-13 | 2013-06-13 | Device containing vacuum circuit-breaker and on-load switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103325639A CN103325639A (en) | 2013-09-25 |
| CN103325639B true CN103325639B (en) | 2015-10-14 |
Family
ID=49194319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310231817.5A Active CN103325639B (en) | 2013-06-13 | 2013-06-13 | Device containing vacuum circuit-breaker and on-load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103325639B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485244B (en) * | 2014-12-05 | 2017-02-22 | 北京合锐清合电气有限公司 | Earthing switch integrated operating mechanism for circuit breaker |
| CN107968024B (en) * | 2017-10-29 | 2020-06-16 | 默飓电气有限公司 | Circuit breaker operating mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956331Y (en) * | 2006-09-29 | 2007-10-03 | 李锐帮 | High-voltage vacuum circuit breaker spring operating mechanism |
| CN201893278U (en) * | 2010-12-24 | 2011-07-06 | 郑州赛金电气有限公司 | Circuit switch device in cable branch box and ring network cabinet |
| CN102522253A (en) * | 2011-12-02 | 2012-06-27 | 泉州七星电气有限公司 | Improved vacuum circuit-breaker pole |
| CN203339095U (en) * | 2013-06-13 | 2013-12-11 | 沈阳春兴成套电器制造有限公司 | Vacuum circuit breaker and load switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03214534A (en) * | 1990-01-17 | 1991-09-19 | Fuji Electric Co Ltd | Power switch |
-
2013
- 2013-06-13 CN CN201310231817.5A patent/CN103325639B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200956331Y (en) * | 2006-09-29 | 2007-10-03 | 李锐帮 | High-voltage vacuum circuit breaker spring operating mechanism |
| CN201893278U (en) * | 2010-12-24 | 2011-07-06 | 郑州赛金电气有限公司 | Circuit switch device in cable branch box and ring network cabinet |
| CN102522253A (en) * | 2011-12-02 | 2012-06-27 | 泉州七星电气有限公司 | Improved vacuum circuit-breaker pole |
| CN203339095U (en) * | 2013-06-13 | 2013-12-11 | 沈阳春兴成套电器制造有限公司 | Vacuum circuit breaker and load switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103325639A (en) | 2013-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311840B (en) | Loop-network switch cabinet solid compositions unit | |
| CN102820626B (en) | Solid insulation vacuum ring-network cabinet | |
| US9269515B2 (en) | Insulating cylinder and a main circuit structure using the same | |
| CN101145677B (en) | Special gas insulation combined appliance for electric railroad | |
| CN201956268U (en) | Indoor solid-sealed type high-voltage vacuum circuit breaker | |
| CN101728781B (en) | Solid isolated vacuum ring main unit | |
| CN203339095U (en) | Vacuum circuit breaker and load switch | |
| CN204376293U (en) | A kind of solid insulation switch module for solid-state insulated switchgear | |
| CN202917370U (en) | Three-position isolation and earthing switch of gas insulated metal-enclosed switchgear | |
| CN103325639B (en) | Device containing vacuum circuit-breaker and on-load switch | |
| CN203932787U (en) | Composite type solid insulation vacuum ring main unit | |
| CN209804536U (en) | Miniaturized vacuum type gas insulated metal enclosed switchgear | |
| CN2817142Y (en) | Small-sized gas-insulated metal closed switch device | |
| CN103325606B (en) | Three-position isolation earthing switch | |
| CN202042412U (en) | Touchable high-voltage circuit breaker | |
| CN203434514U (en) | Solid assembly unit of loop-network switch cabinet | |
| CN2814739Y (en) | Outdoor high voltage opening combined electric appliance | |
| CN104143451B (en) | High-speed earthing switch and earthing switch assembly unit with same | |
| CN216353930U (en) | GIS is with two break isolator | |
| CN206225875U (en) | A kind of solid insulated switchgear | |
| CN203367118U (en) | Three-position isolation grounding switch | |
| CN104112999A (en) | Solid insulation ring main unit | |
| CN202797734U (en) | Combination switch cabinet of solid insulation fuse | |
| CN113258494A (en) | Sliding plug-in type solid insulation switch module | |
| CN105428145B (en) | High-voltage outdoor vacuum switch with isolating switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |