CN205004252U - Novel high -voltage circuit breaker - Google Patents
Novel high -voltage circuit breaker Download PDFInfo
- Publication number
- CN205004252U CN205004252U CN201520740347.XU CN201520740347U CN205004252U CN 205004252 U CN205004252 U CN 205004252U CN 201520740347 U CN201520740347 U CN 201520740347U CN 205004252 U CN205004252 U CN 205004252U
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- Prior art keywords
- breaker
- porcelain sleeve
- insulated porcelain
- novel high
- voltage circuit
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Abstract
The utility model relates to a high -voltage switch field especially relates to novel high -voltage circuit breaker. Containing the frame, containing vacuum interrupter in the frame, the vacuum interrupter overhead is adorned among last insulating insulator, goes up electric porcelain cover upside and connects the seat and draw and be qualified for the next round of competitions of being qualified for the next round of competitions, and upward the seat of being qualified for the next round of competitions is down connected to insulating insulator downside, contains the silicone grease between explosion chamber and the last insulating insulator, and the lower part of explosion chamber is the guide arm of leading, and the guide arm is through an electrically conductive clamp and a lower line connection. Beneficial effect: in the whole the design process of circuit breaker, the operating mechanism is located the downside of whole circuit breaker, places between two parties, and this type of is arranged, and easily maintenance and control scheme's lays, the operating mechanism adopts siemens's technique manufacturing to carry out the mechanism and improve, with the effect that reaches the matching. The length of mechanical durability of mechanism can reach 100, 000 times, is higher than 10, 000 times of national standard far away.
Description
Technical field
The utility model relates to high-voltage switch gear field, particularly relates to novel high-voltage circuit-breaker.
Background technology
At present, in the electric power system of 35KV electric pressure, the main outdoor breaker run and use has following several: vacuum circuit-breaker ZW7-40.5; The usage quantity of the bulk-oil circuit-breaker DW8-40.5. vacuum circuit-breaker of SF6 sulfur hexafluoride breaker LW8-40.5 and only a few accounts for the overwhelming majority.
In use, current ZW7-40.5 circuit breaker, build is large, highly reaches about 2500mm, transport and installation risk large; Frame adopts the welding of full-shape steel, and operation is loaded down with trivial details, makes trouble, and total man's work manufactures, and consistency is poor; Core operating mechanism adopts the CT19 mechanism of the eighties, and part is many, and fault is many, and structure closely, is difficult to maintenance.The connected driving parts such as insulated tension pole exposes among air, is subject to the impact of outside climatic, is easy to get rusty, and is easy to freeze to death, often can not action message.The transmission link of whole circuit breaker is more, and energy loss is serious, so require that the combined floodgate merit of mechanism is large, comparatively large to the impact of correlated parts, load is comparatively large, is difficult to mechanical endurance be up to state standards.
Utility model content
The object of utility model: in order to provide a kind of novel high-voltage circuit-breaker of better effects if, specific purposes are shown in multiple substantial technological effects of concrete implementation section.
In order to reach as above object, the utility model takes following technical scheme:
Novel high-voltage circuit-breaker, it is characterized in that, comprise frame, frame comprises vacuum interrupter, vacuum interrupter is put and is loaded among insulated porcelain sleeve, connect upper wire outlet seat on the upside of upper insulated porcelain sleeve and draw upper outlet, connect lower wire outlet seat on the downside of upper insulated porcelain sleeve, the bottom of arc control device is guide rods of action, and guide rod is connected with lower outlet by conductive clip, attended operation insulator below guide rod, operation insulator is positioned among lower insulated porcelain sleeve.
The further technical scheme of the utility model is, comprises silicone grease between described arc control device and upper insulated porcelain sleeve.
The further technical scheme of the utility model is, described arc control device outside is coated with epoxy resin, and the outside of epoxy resin adopts silicon rubber secondary package to carry out antifouling.
The further technical scheme of the utility model is, what adopt in lower insulated porcelain sleeve is air insulation, this air and the external world not communications and liaison.
The further technical scheme of the utility model is, also there is the structure of full skirt form described lower insulated porcelain sleeve and/or upper insulated porcelain sleeve inside, descends insulated porcelain sleeve to be the structure of interior external shed like this.
The further technical scheme of the utility model is, is epoxy resin insulator.
The further technical scheme of the utility model is, attended operation operation insulator below the guide rod of described action, operation insulator connects guide rod, connecting breaker main shaft below described connection guide rod, breaker main shaft comprises a connecting plate, connecting plate is connected to kinematic link, and kinematic link can promote connecting plate and promote guide rod further and move upward.
The further technical scheme of the utility model is, adds temperature and humidity controller in the downside of circuit breaker.
The further technical scheme of the utility model is, the skirt face of described full skirt pattern is horizontal plane.
The further technical scheme of the utility model is, the inside and outside wall of described upper insulated porcelain sleeve and/or lower insulated porcelain sleeve all comprises more than one projection.
Adopt the utility model of as above technical scheme, have following beneficial effect relative to prior art: in the global design process of circuit breaker, operating mechanism is positioned at the downside of whole circuit breaker, places between two parties, this type of arrangement, be easy to overhaul and the laying of control circuit; Operating mechanism adopts Siemens technique manufacture, and carries out mechanism's improvement, to reach the effect of coupling.The mechanical endurance of mechanism is the longest reaches 100,000 times, far away higher than 10,000 times of national standard.
Accompanying drawing explanation
In order to further illustrate the utility model, be described further below in conjunction with accompanying drawing:
Fig. 1 is utility model structural representation; Fig. 2 is utility model side structure schematic diagram; Wherein: 1. output toggle arm; 2. mechanism's main shaft; 3. mechanism's output toggle arm; 4. operating mechanism; 5. framework; 6. descend insulated porcelain sleeve; 7. descend wire outlet seat; 8. aluminum frame; 9. be flexible coupling; 10. go up insulated porcelain sleeve; Wire outlet seat on 11.; 12. kinematic links; 13 breaker main shafts; 14. connect guide rod; 15. spring bases; 16. touch springs; 17. connectors; 18. operation insulators; 19. guide plates; 20. guide rods; 21. conductive clips; 22. vacuum interrupters; 23. energy-stored springs; 24. energy storage motors; 25. connecting rods; The sincere son of 26. separating brake; 27. rollers; 28. closing pawls; 29 cams; 30A roller; 31 tripping springs; 32B roller; 33. reductors; 34. making electromagnets; 35. tripping electromagnets.
Embodiment
Be described embodiment of the present utility model below in conjunction with accompanying drawing, embodiment does not form restriction of the present utility model:
Novel high-voltage circuit-breaker, it is characterized in that, comprise frame, frame comprises vacuum interrupter, vacuum interrupter is put and is loaded among insulated porcelain sleeve, connect upper wire outlet seat on the upside of upper insulated porcelain sleeve and draw upper outlet, connect lower wire outlet seat on the downside of upper insulated porcelain sleeve, the bottom of arc control device is guide rods of action, and guide rod is connected with lower outlet by conductive clip, attended operation insulator below guide rod, operation insulator is positioned among lower insulated porcelain sleeve.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: in a creative way, by built-in for section transmission part, and running part is not easily fallen ash or cause other to damage, and fail safe is better, and integrated function is better.
Silicone grease is comprised between described arc control device and upper insulated porcelain sleeve.Described arc control device outside is coated with epoxy resin, and the outside of epoxy resin adopts silicon rubber secondary package to carry out antifouling.What adopt in lower insulated porcelain sleeve is air insulation, this air and the external world not communications and liaison.Also there is the structure of full skirt form described lower insulated porcelain sleeve and/or upper insulated porcelain sleeve inside, descend insulated porcelain sleeve to be the structure of interior external shed like this.For epoxy resin insulator.But described upper insulated porcelain sleeve and/or lower insulated porcelain sleeve can be also that epoxy resin replaces by same structure material, as further preferred, epoxy resin outside can also add one deck silicon rubber umbrella skirt.
It should be noted that, the full skirt described in literary composition also can be stated by this word of projection.
Attended operation operation insulator below the guide rod of described action, operation insulator connects guide rod, connecting breaker main shaft below described connection guide rod, breaker main shaft comprises a connecting plate, connecting plate is connected to kinematic link, and kinematic link can promote connecting plate and promote guide rod further and move upward.Pattern is shown in below statement more specifically.
The described downside at circuit breaker adds temperature and humidity controller.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: temperature and humidity controller can effectively obtain temperature and humidity information, even adjusts temperature and humidity.
The skirt face of described full skirt pattern is horizontal plane.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: due to the existence of horizontal plane, make flowing water directly can not form surfacewise through runner, also just avoid the electric discharge phenomena that water wire causes.
The inside and outside wall of described upper insulated porcelain sleeve and/or lower insulated porcelain sleeve all comprises more than one projection.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: inside and outside wall all comprises more than one projection, all insulate inside and outside can realizing, make overall insulation effect better, effectively can increase creepage distance, after especially preventing condensation, cause electric discharge.
conductivity principle
Electric current causes quiet end and the moved end of vacuum interrupter 22 by upper outlet, then 9 to be drawn to lower outlet by conductive clip 21 and being flexible coupling.
operating principle:the control of circuit breaker to whole system has been come by the operation of " dividing " " conjunction ", circuit breaker is operated by operating mechanism, mechanism with tripping spring drivening rod, that insulated tension pole moves up and down, drive connecting lever sways, thus guide rod is moved up and down, with realize the dynamic and static contact of arc control device point, resultant motion.Concrete operations are as follows.
, thermal energy storage process:energy storage motor 24 is energized---electric machine rotation is by reductor 33 inner turbine underdrive camshaft---camshaft opposite side connecting lever pulls energy-stored spring 23 energy storage---when top dead centre is crossed in energy storage, reductor clutch is opened---simultaneously travel switch power-off---motor stalls--spring crossing top dead centre shortens and pulls main shaft to continue to move under self pulling force effect---until when A roller 30 is locked closing pawl 28 end face---main shaft stop motion---thermal energy storage process completes.
, making process:obtain " combined floodgate " instruction---making electromagnet 34 coron------closing pawl 28 rotates, and---when the sincere sub-end face of the sincere landing of A roller 30,---energy-stored spring 23 shrinks main axis, and---cam 29 rotates, and---cam surface pushing rolling wheels 27--connecting rod 25 moves, and---mechanism's main shaft 2 rotates, and---tripping spring is compressed simultaneously, and---mechanism's main shaft output toggle arm 1 moves, and---kinematic link 12 moves, and---breaker main shaft 13 moves---connects the guide rod 14 moved end contact operating insulator 18, guide rod 20 and vacuum interrupter 22 that move from bottom to top-drives to move that--dynamic/static contact in arc control device is engaged completely, and---touch spring 16 is compressed---until B roller 32 streaks the sincere section of sub 26 of separating brake--be finally stuck on section---that making process completes to clash into closing pawl 28 bent plate.Energy-stored spring 23 is after releasing energy simultaneously, forms switch and is switched on, and energy storage motor 24 obtains electric, starts above-mentioned " thermal energy storage process ".
, separating brake process: as figure,---tripping electromagnet 35 obtains coron, and------the sincere son of separating brake rotates, and---when the section of the sincere son of B roller 32 sincere landing separating brake,------output toggle arm 1 rotates, and---kinematic link 12 moves--breaker main shaft 13 counter motion--pulls connection guide rod 14 to the counter motion of tripping spring 31 pushing mechanism main shaft 2 to clash into the connection bent plate of the sincere son of separating brake to obtain " separating brake " instruction, operation insulator 18, guide rod 20 etc. moves downward--the moved end guide rod of vacuum interrupter 22 moves downward--and moves, fixed contact is separated---separating brake action completes-dynamic/static contact of arc control device between maintain the distance of a 20-24mm.
" conjunction " " divides " is two kinds of operating states of circuit breaker, is mechanically to be realized by two kinds of stable positions, finally will meet the mechanical parameter of arc control device.
Further illustrate the location parameter under two states, the total kilometres of circuit breaker are about 31.5mm, the opening apart from variable quantity (overtravel) about the 4mm at about 24mm, contact stage clip of contact.
Except above basic fixing mechanical parameter, the kinematic parameter of circuit breaker to be met: opening velocity, closing speed, opening time, closing time, point parameter such as the same period and indentured period simultaneously.
Following table is exactly the parameter in circuit breaker actual measurement:
Clearance between open contacts mm20 ± 2
Contact over travel mm4 ± 1
Contact closing rebound ms≤3
Spaced apart 710 ± 5
Three-phase combined floodgate ms≤2 same period
Three-phase separating brake ms≤2 same period
Average closing speed m/s0.6 ± 0.2
Average opening velocity m/s1.6 ± 0.2
Closing time mst≤120
Opening time mst≤80
Major loop resistance Μ ω≤50
One minute industrial frequency withstand voltage 80KV
Mechanical endurance 30000 times (
domestic)
Note: above 30000 life-spans are mechanisms that our company utilizes Siemens technique to manufacture, and namely domesticize mechanism.
Above parameter meets the requirement of [national standard] relevant with power industry [specification] of High-Voltage Electrical Appliances Circuit breaker technology completely.
temperature and humidity control system operation principle:
When the temperature of circuit breaker internal or humidity exceed the scope preset, this information will be passed to temperature and humidity controller by transducer.Temperature and humidity controller action, inside contactor closes, and heater bands point works, and moisture grid window is got rid of.After greenhouse degree returns to acceptability limit, transducer is to controller instruction, and then contactor disconnects, and heater power-off quits work.
as nonessential expansion: instrument transformer outlet structure;on above basis, current transformer is arranged on a kind of structure on breaker body, as a kind of form expanding use of this circuit breaker.Current transformer is not used alone support installing in the process used, but uses the support of circuit breaker, saves space and mounting cost.
as preferably:
raw material choose: adopt A3 hot rolled steel plate thickness 4mm
manufacture process:split by the three-view diagram of support body, be divided into different parts, the processing that the bending in later stage etc. is follow-up is mainly considered in segmentation.By various piece planar development, wherein consider that bending coefficient etc. is to the compensation on plate size.Weld job is carried out after complete, by welding, all parts is coupled together, in order to ensure the precision of welding, weld the coupling part of each parts, just reserved location hole in laser cutting, as long as ensure that when welding it is vertical, parallel, requirement such as straight grade, carries out after having welded polishing and necessary polishing.Finally require to carry out surface treatment according to user, process has 2 selections: outdoor Dacroment or hot galvanizing.
explanation: the realization of manufacturing process is based on powerful numerical control laser cutter and large-tonnage numerical control bender, and technique abandons the technique of angle steel welding that can be traditional completely.
advantage:
One, improve machining accuracy, improve the reliability of product.
Two, increase work efficiency, reduce task difficulty, save personnel cost.
Circuit breaker is rational deployment in overall structure, space optimization, small and exquisite.; In the drive system of entirety, except operating mechanism keeps original characteristic substantially, other system all have passed through design again and detailed calculating.(all fabrication drawings and computational methods can be provided) can more than 90% element designed, designed.The scheme comprising built-in drive system and this solution drive system is original.
This patent is convenient to universal and promotion prospect is wide, and market capacity is huge, and industrialization feature with the obvious advantage, miniaturized is given prominence to, the level rising to an international advanced person in reliability and useful life.The manufacturing process of the bold science of application of the technology such as numerical control device is trial and the innovation very well that high-end manufacture is moved towards in electrical circuitry equipment manufacture.
More than one projection is all comprised about on the inside and outside wall of described upper insulated porcelain sleeve and/or lower insulated porcelain sleeve, scheme of further expanding is: also comprise the connecting rod that contact can be driven to contact at arc control device, connection rotating shaft below connecting rod, rotating shaft connects brace, brace side is fixed on the end of action axle, and action axle can stretch.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: this place provides concrete manner of execution, can effectively realize cut-offfing of overall circuit breaker.Projection on described inside and outside wall is respectively external shed and interior full skirt.
The diameter of described interior full skirt multiple skirt body structure is consistent.It is silicon rubber umbrella skirt that described external shed and/or interior full skirt outside are coated with one deck silica gel.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: adopt silicon rubber secondary package in the outside of entirety, increase creepage distance by increasing silicon rubber umbrella skirt.Described external shed and/or each own skirt body structure diameter of interior full skirt not necessarily consistent.The technique effect of the essence that the technical scheme at this place plays and implementation procedure thereof are as follows: inconsistent structure, can not have the isolation material of the through entirety of possibility by rainwater, make the fail safe of structure and insulating properties better.
It should be noted that, multiple schemes that this patent provides comprise basic scheme own, separate, mutually do not restrict, but it also can combine when not conflicting mutually, reaching multiple effect and jointly realizing.
In the global design process of circuit breaker, operating mechanism is positioned at the downside of whole circuit breaker, places between two parties, this type of arrangement, is easy to overhaul and the laying of control circuit; Operating mechanism adopts Siemens technique manufacture, and carries out mechanism's improvement, to reach the effect of coupling.The mechanical endurance of mechanism is the longest reaches 100,000 times, far away higher than 10,000 times of national standard.
Vacuum interrupter is put, is loaded among insulator, on the upside of insulator, connect upper outlet, connect lower outlet on the downside of insulator, between arc control device and insulator, also can fill with silicone grease, cause short circuit phenomenon for the moisture condensation prevented and treated in air.The bottom of arc control device is moving conductive rods, to be connected with being flexible coupling by conductive clip with lower outlet.
Insulator under being between frame and lower outlet, working is exactly insulated in galvanic circle and ground, and what adopt inside lower insulator is air insulation, and in order to increase creepage distance, also there is full skirt insulator inside, and lower insulator is interior external shed.
The running part of mechanism and movable end of arc extinguishing chamber, all designs among whole insulator or support, and successively, moving conductive rod, connector, guider, insulated tension pole, the parts such as touch spring and connecting rod are connected with main shaft.Support is the coupling part of upper and lower insulator, is the carrier of lower wire end, and indoor design simultaneously has the structure division for installing guide plate, simultaneously closing debugging conveniently to observe, support has rectangular breach.
Main shaft is positioned at the iron square chest of cuboid of the upside of support body, and be connected with mechanism down, the action of mechanism, by main shaft three-phase ganged, to control deciliter action of circuit breaker.
In the downside of circuit breaker, install temperature and humidity controller additional, one is prevent lower insulator internal condensation, and two is ensure drive system, prevents from freezing to death below-20 DEG C, the reliability of circuit breaker deciliter action.
This novel breaker structurally optimal design, both can be produced into porcelain knob structure, also can be epoxy casting insulation system; It is minimum and the lightest that the profile of this circuit breaker and weight reach like product.Operating mechanism mechanism positions, in integrally-built middle and lower part, is convenient to maintenance and inspection and wiring; Arc control device are among the insulated porcelain sleeve (or epoxy insulation) on top, and bearing and lower wire end insulate with by lower insulated porcelain sleeve (or epoxy insulation) and circuit breaker support body.Behaviour's drive system have employed built-in mode, mechanism, connecting rod, and the drive train element such as main shaft and insulated tension pole is all arranged on circuit breaker internal and is hedged off from the outer world, indoor design temperature and humidity control system, prevents and treats low temperature and condensation.By to the height of insulator and the different designs of creepage distance, this circuit breaker can be applied to height above sea level 4000 meters;
Vacuum interrupter is put, is loaded among insulator, on the upside of insulator, connect upper outlet, on the downside of insulator, connect lower outlet, between arc control device and insulator, adopting silicone grease to fill, causing short circuit phenomenon for preventing the moisture condensation in air.The bottom of arc control device is moving conductive rods, to be connected with being flexible coupling by conductive clip with lower outlet.Also can pass through epoxy casting technique, arc control device epoxy resin is wrapped up, adopt silicon rubber secondary package in the outside of entirety, be increased by increase silicon rubber umbrella skirt and pull out electric distance.
Axle is positioned at the iron square chest of cuboid of the upside of support body, and be connected with mechanism down, the action of mechanism, by main shaft three-phase ganged, to control deciliter action of circuit breaker.
Framework adopts Full-numerical-control manufacturing process, by 5mm Steel plate laser Numerical control cutting, then carries out shaping with numerical control bending, finally welds.Avoid traditional handicraft and adopt the manufacture of the section bar such as angle steel or channel-section steel, the problems such as manufacturability is poor, and operation is loaded down with trivial details, and precision is restive, improve manufacture efficiency simultaneously and reduce cost of labor.Manufacturing cost achieves breakthrough.
more than show and describe general principle of the present utility model, principal character and advantage of the present utility model.Those skilled in the art should understand the utility model and not be restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (9)
1. novel high-voltage circuit-breaker, it is characterized in that, comprise frame, frame comprises vacuum interrupter, vacuum interrupter is put and is loaded among insulated porcelain sleeve, connect upper wire outlet seat on the upside of upper insulated porcelain sleeve and draw upper outlet, connect lower wire outlet seat on the downside of upper insulated porcelain sleeve, the bottom of arc control device is guide rods of action, and guide rod is connected with lower outlet by conductive clip, attended operation insulator below guide rod, operation insulator is positioned among lower insulated porcelain sleeve.
2. novel high-voltage circuit-breaker as claimed in claim 1, is characterized in that, comprise silicone grease between described arc control device and upper insulated porcelain sleeve.
3. novel high-voltage circuit-breaker as claimed in claim 1, it is characterized in that, described arc control device outside is coated with epoxy resin, and the outside of epoxy resin adopts silicon rubber secondary package to carry out antifouling.
4. novel high-voltage circuit-breaker as claimed in claim 1, is characterized in that, what adopt in lower insulated porcelain sleeve is air insulation, this air and the external world not communications and liaison.
5. novel high-voltage circuit-breaker as claimed in claim 3, is characterized in that, also there is the structure of full skirt form described lower insulated porcelain sleeve and/or upper insulated porcelain sleeve inside, descends insulated porcelain sleeve to be the structure of interior external shed like this.
6. novel high-voltage circuit-breaker as claimed in claim 1, it is characterized in that, attended operation operation insulator below the guide rod of described action, operation insulator connects guide rod, connecting breaker main shaft below described connection guide rod, breaker main shaft comprises a connecting plate, connecting plate is connected to kinematic link, and kinematic link can promote connecting plate and promote guide rod further and move upward.
7. novel high-voltage circuit-breaker as claimed in claim 1, is characterized in that, add temperature and humidity controller in the downside of circuit breaker.
8. novel high-voltage circuit-breaker as claimed in claim 5, it is characterized in that, the skirt face of described full skirt pattern is horizontal plane.
9. novel high-voltage circuit-breaker as claimed in claim 1, is characterized in that, the inside and outside wall of described upper insulated porcelain sleeve and/or lower insulated porcelain sleeve all comprises more than one projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520740347.XU CN205004252U (en) | 2015-09-23 | 2015-09-23 | Novel high -voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520740347.XU CN205004252U (en) | 2015-09-23 | 2015-09-23 | Novel high -voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205004252U true CN205004252U (en) | 2016-01-27 |
Family
ID=55161130
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520740347.XU Expired - Fee Related CN205004252U (en) | 2015-09-23 | 2015-09-23 | Novel high -voltage circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN205004252U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161352A (en) * | 2015-09-23 | 2015-12-16 | 陕西西高开关有限责任公司 | Novel high-voltage circuit breaker |
-
2015
- 2015-09-23 CN CN201520740347.XU patent/CN205004252U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161352A (en) * | 2015-09-23 | 2015-12-16 | 陕西西高开关有限责任公司 | Novel high-voltage circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 Termination date: 20170923 |