CN2805158Y - Earthing switch by using vacuum arc-chutes open/close induction current - Google Patents
Earthing switch by using vacuum arc-chutes open/close induction current Download PDFInfo
- Publication number
- CN2805158Y CN2805158Y CN 200520050696 CN200520050696U CN2805158Y CN 2805158 Y CN2805158 Y CN 2805158Y CN 200520050696 CN200520050696 CN 200520050696 CN 200520050696 U CN200520050696 U CN 200520050696U CN 2805158 Y CN2805158 Y CN 2805158Y
- Authority
- CN
- China
- Prior art keywords
- vacuum interrupter
- fixed
- contact
- earthed switch
- rotating shaft
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a ground switch using the opening and closing of a vacuum arc-extinguishing chamber for inducing current. The utility model comprises a ground switch body and an auxiliary circuit, wherein the ground switch body comprises a static contact, a main cutter switch, a grounding rotating shaft, abase, an operating mechanism and a porcelain bottle, wherein the lower end of the main cutter switch is fixed to the base, the base is connected with the operating mechanism, the porcelain bottle is fixed to the base and the static contact is fixed to the upper end of the porcelain bottle. The auxiliary circuit comprises a static arc contact, a movable arc contact and a vacuum arc-extinguishing chamber assembling device and the operating mechanism used for controlling the vacuum arc-extinguishing chamber assembling device; the static arc contact is integrally connected with the static contact, the movable arc contact is pivoted with the upper part of the main cutter switch and connected with the vacuum arc-extinguishing chamber assembling device via a flexible insulating conducting wire, the vacuum arc-extinguishing chamber assembling device is assembled and fixed on the base, and the lower end of the vacuum arc-extinguishing chamber assembling device is connected with the operating mechanism. The utility model has excellent capability of discharging and stopping electromagnetic induction current and electrostatic induction current, and the utility model having a parameter which is higher than national and trade standard requirement can adapt to the requirement of high parameters suggested by users.
Description
Technical field
The utility model is mainly concerned with the earthed switch field of electric power system, refers in particular to a kind of earthed switch that utilizes the vacuum interrupter opening and closing induction current.
Background technology
Along with the development of power construction, the continuous expansion of electrical network is carried and the improving constantly of capacity, and takes up an area of in order to reduce the transmission of electricity corridor, adopts common-tower double-return road aerial high-voltage power transmission line in parallel day by day to increase.In order to ensure system's operational reliability and fail safe, require earthed switch opening and closing induction current problem urgent day by day, in many 550kV and the following power transformation engineering technical specification the faradic requirement of earthed switch folding high parameter has been proposed.
During current power was built, on the one hand, 550kV level outdoor AC high voltage ground switch equipment consumption sharply increased, and on the other hand, can't provide both at home and abroad and satisfy customer requirements (electro permanent magnetic induction 300A/35kV, electrostatic induction 50A/35kV.And national standard and industry standard are: electro permanent magnetic induction 160A/20kV, electrostatic induction 25A/25kV.) the earthed switch with opening and closing induction current ability.Therefore the blank of this product causes the design of some 550kV power transformation engineerings can not adopt prioritization scheme.
The utility model content
The technical problems to be solved in the utility model just is: at the technical problem of prior art existence, the utility model provides a kind of earthed switch that utilizes vacuum interrupter opening and closing induced current ability for electric power system, it has opening and closing electromagnetic induction electric current is 300A/35kV, and the electrostatic induction electric current is the ability of 50A/35kV.
In order to solve the problems of the technologies described above, the solution that the utility model proposes is: a kind of earthed switch that utilizes the vacuum interrupter opening and closing induction current, it comprises earthed switch body and subsidiary loop, this earthed switch body mainly comprises fixed contact, operator lock, ground connection rotating shaft, base, operating mechanism and porcelain vase, and the lower end of the lock of wherein operating is fixed on the base.Base is connected with operating mechanism, and porcelain vase is fixed on the base, and fixed contact is fixed on the porcelain vase upper end, it is characterized in that: described subsidiary loop comprises quiet arc contact, moving arcing contact, vacuum interrupter assembling and the operating mechanism that is used for controlling the vacuum extinction chamber assembly; Quiet arc contact and fixed contact are connected as a single entity, and moving arcing contact is articulated in the top of operator lock and links to each other with the vacuum interrupter assembling by the flexible insulation lead; The vacuum interrupter mount is on base, and the lower end of this vacuum interrupter assembling links to each other with operating mechanism.
Described vacuum interrupter assembling mainly comprises vacuum interrupter, lid, insulating sleeve, outer steel sleeve, interior steel bushing, overtravel spring, tripping spring and roller, and wherein the vacuum interrupter upper end is fixed on and covers, and lid then is fixed on insulating sleeve top; In the vacuum interrupter lower end, the moving contact of interior steel bushing and vacuum interrupter closely connects together, and on the outer ring of steel bushing, tripping spring was enclosed between the inside and outside steel bushing in outer steel sleeve slided over; In the steel bushing, in the steel bushing, insulating sleeve bottom and underframe were fixed together in roller then was set in the overtravel spring was arranged at.
The described operating mechanism that is used for controlling the vacuum interrupter assembling mainly comprises shift fork, transmission crank arm, step-less adjustment ring flange, cam, switching-in spring device, limited bolt, sliding piece, rotating shaft, connecting lever, underframe; This underframe is connected on the base, and shift fork is fixed in the ground connection rotating shaft; Transmission crank arm is connected in an end of rotating shaft, and the other end of rotating shaft then is half-moon-shaped; A side of underframe is passed in rotating shaft, is arranged with cam, connecting lever, sliding piece in the rotating shaft successively, and the little pin on the cam falls in the oval groove of connecting lever, and the half-moon-shaped hole of sliding piece and the first quarter moon profile shaft of the rotating shaft other end are connected, and the switching-in spring device is connected with connecting lever.
One end of described flexible insulation lead links to each other with moving arcing contact, and the other end then links to each other with vacuum interrupter, and two ends all adopt the crimping mode to connect.
Described quiet arc contact and two stands with bolted together, the fixed contact of two stands and earthed switch assembles in aggregates by bolt.
Described moving arcing contact is installed on the top of the operator lock of earthed switch by silicon rubber insulator, and moving arcing contact and silicon rubber insulator are rotary hinge form between the two.
Compared with prior art, advantage of the present utility model is:
1. the utility model utilizes the earthed switch of vacuum interrupter opening and closing induction current to adopt the vacuum interrupter that is adapted to opening and closing induction current especially of novel development, has the excellent opening and closing em induced current and the ability of static induced current; The arc control device external insulation has adopted the special media of excellent insulation performance to fill the requirement of insulation property when satisfying the opening and closing induced current fully; Parameter of the present utility model is higher than country and industry standard requirement, can satisfy the high parameter requirement that the user proposes;
2. the utility model utilizes the earthed switch vacuum interrupter of vacuum interrupter opening and closing induction current to be installed in the insulator, no leakage, non-environmental-pollution, need not repair and maintenance;
The utility model utilize the vacuum interrupter opening and closing induction current earthed switch easy accessibility, assembling flexibly, and can be by on original earthed switch body, directly converting, only need install subsidiary loop part of the present utility model, this earthed switch just can be transformed into the earthed switch with opening and closing irritability current capacity, thereby can reach the corresponding techniques parameter;
4. the utility model utilizes the critical component of the earthed switch of vacuum interrupter opening and closing induction current to adopt stainless steel material to make, and promptly is to adopt stainless steel material to make such as rotating shaft, thereby has guaranteed the flexibility and reliability of product long-time running.
Description of drawings
Fig. 1 is a general assembly structural representation of the present utility model;
Fig. 2 is the structural representation of the dynamic and static arcing contact of the utility model switch;
Fig. 3 is the connection diagram of the utility model switch moving arcing contact;
Fig. 4 is the structural principle schematic diagram of the utility model vacuum interrupter;
Cam drive principle schematic when Fig. 5 is the utility model closing position.
Marginal data
1, moving arcing contact 2, support 3, quiet arc contact
4, fixed contact 5, operator lock 6, ground connection rotating shaft
7, base 8, operating mechanism 9, shift fork
10, transmission crank arm 11, vacuum interrupter assembling 12, step-less adjustment ring flange
13, porcelain vase 14, silicon rubber insulator 15, flexible insulation lead
16, insulating sleeve 17, vacuum interrupter 18, outer steel sleeve
19, interior steel bushing 20, overtravel spring 21, tripping spring
22, roller 23, cam 24, switching-in spring device
25, limited bolt 26, sliding piece 27, rotating shaft
28, connecting lever 29, underframe 30, torsion spring
31, plug screw
Embodiment
Below with reference to accompanying drawing the utility model is described in further details.
As shown in Figure 1, the utility model utilizes the earthed switch of vacuum interrupter opening and closing induction current mainly to comprise earthed switch body and subsidiary loop, and this subsidiary loop mainly comprises quiet arc contact 3, moving arcing contact 1, vacuum interrupter assembling 11 and the operating mechanism that is used for controlling vacuum interrupter assembling 11.This earthed switch body mainly comprises fixed contact 4, operator lock 5, ground connection rotating shaft 6, base 7, operating mechanism 8 and porcelain vase 13, wherein the operate lower end of lock 5 is fixed on the base 7, connect with steel tube between base 7 and the operating mechanism 8, and employing bolted, ground connection rotating shaft 6 is a workpiece of base 7, porcelain vase 13 is fixed by bolts on the base 7, and fixed contact 4 is fixed by bolts to porcelain vase 13 upper ends.Referring to Fig. 2 as seen, quiet arc contact 3 and two stands 2 usefulness bolted together, two stands 2 is in aggregates with fixed contact 4 assemblings of earthed switch, between adopt bolt to connect; 1 top that is installed on the operator lock 5 of earthed switch by silicon rubber insulator 14 of moving arcing contact, be rotary hinge form between the two, moving arcing contact 1 and silicon rubber insulator 14 can be around hinge through, and can make by torsion spring 30 effects of silicon rubber insulator 14 opposite sides dynamic and static arcing contact 1,3 minute, in the making process (before vacuum interrupter 17 does not divide, closes) keep excellent contact.Moving arcing contact 1 couples together by flexible insulation lead 15 with vacuum interrupter 17, and the two ends of flexible insulation lead 15 all adopt the crimping mode to connect, and subsidiary loop forms the loop of conducting like this; Satisfy the requirement of insulation property simultaneously between subsidiary loop and the earthed switch body by silicon rubber insulator 14.Critical component of the present utility model adopts stainless steel material to make, and promptly is to adopt stainless steel material to make such as rotating shaft, thereby has guaranteed the flexibility and reliability of product long-time running.
As shown in Figures 2 and 3, this vacuum interrupter assembling 11 mainly comprises vacuum interrupter 17, lid 25, insulating sleeve 16, outer steel sleeve 18, interior steel bushing 19, overtravel spring 20, tripping spring 21 and roller 22, wherein vacuum interrupter 17 upper ends are fixed on nut and cover on 25, lid 25 is screwed on insulating sleeve 16 tops, in vacuum interrupter 17 lower ends, soket head cap screw closely connects together the moving contact of interior steel bushing 19 with vacuum interrupter 17, outer steel sleeve 18 is enclosed within on the outer ring of interior steel bushing 19, can slide up and down, in tripping spring 21 is enclosed within, outer steel sleeve 19, between 18, under the effect of tripping spring 21,18 bottoms that are supported on vacuum interrupter 17 of outer steel sleeve, the moving contact that interior steel bushing 19 drives vacuum interrupter 17 moves, in vacuum interrupter 17, form the fracture of regulation, the overtravel spring is placed in the interior steel bushing 19, and compresses in advance with plug screw 31; In being enclosed within, the little pivot pin of roller 22 usefulness in the steel bushing 19, can rotate; After assembling was finished, insulating sleeve 16 bottoms were fixed together by bolt and underframe 29.Referring to Fig. 3, after the vacuum interrupter assembling was assembled with operating mechanism, when the separating brake position, roller 22 just contacted with cam 23.
As shown in Figure 4 and Figure 5, the operating mechanism that is used for controlling the vacuum extinction chamber assembly mainly comprises shift fork 9, transmission crank arm 10, step-less adjustment ring flange 12, cam 23, switching-in spring device 24, limited bolt 25, sliding piece 26, rotating shaft 27, connecting lever 28, underframe 29.Wherein, underframe 29 is installed on the base 7 of earthed switch body by bolt, shift fork 9 is parts of step-less adjustment ring flange 12, it is fixed on by flat key in the ground connection rotating shaft 6 of earthed switch body, and shift fork 9 is with the branch of earthed switch, ground connection rotating shaft 6 is rotated and stirred branch, the combined floodgate that transmission crank arm 10 is finished vacuum interrupter 17 when closing a floodgate; Transmission crank arm 10 is welded on an end (other end is half-moon-shaped) of rotating shaft 27, a side of underframe 29 is passed in rotating shaft 27, overlap overhead cam 23, connecting lever 28, sliding piece 26 in order, little pin on the cam 23 falls in the oval groove of connecting lever 28, the half-moon-shaped hole of sliding piece 26 cooperates with rotating shaft 27 other end first quarter moon profile shafts, when rotating shaft 27 is rotated, the sliding piece 26 same angles equally of rotating, both form and pass for process, after the opposite side of underframe 29 was passed in rotating shaft 27, the biside plate of underframe 29 became two fulcrums of rotating shaft 27; Switching-in spring device 24 is linked to be the structure of a transmission branch, combined floodgate merit by small clevis pin with head and connecting lever 28.
Operation principle: when earthed switch closes a floodgate, the operator lock 5 that promptly is meant the earthed switch body is realized closing a floodgate under the control of operating mechanism 8, ground connection plug-in strip 5 and moving arcing contact 1 are upwards put from horizontal level together, near combined floodgate the time, moving arcing contact 1 is contact quiet arc contact 3 earlier, shift fork 9 is along with transmission crank arm 10 is stirred in ground connection rotating shaft 6 rotations, transmission crank arm 10 drives rotating shaft 27 and rotates, the same angle of sliding piece 26 same rotations that is connected with rotating shaft 27, sliding piece 26 drives the connecting lever 28 that is attached thereto rotates cam 23, thereby make vacuum interrupter 17 realize closing a floodgate, vacuum interrupter 17 closes and closes induced current, induced current is conducting in subsidiary loop, and then earthed switch main switch cutter 5 closes a floodgate, and continues induced current by 5 carryings of main switch cutter; During the earthed switch separating brake, main switch cutter 5 earlier separately, induced current is transferred in the subsidiary loop, in like manner, shift fork 9 is along with transmission crank arm 10 is stirred in ground connection rotating shaft 6 rotations, transmission crank arm 10 drives rotating shaft 27 and rotates, the same angle of sliding piece 26 same rotations that is connected with rotating shaft 27, sliding piece 26 drives the connecting lever 28 that is attached thereto rotates cam 23, and vacuum interrupter 17 separating brake under the effect of tripping spring 21, vacuum interrupter 17 cut-offs induced current, and is then moving, quiet arc contact 1,3 separately, moving arcing contact 1 moves to horizontal level with main switch cutter 5 bottoms, finishes the separating brake process.
Claims (6)
1, a kind of earthed switch that utilizes the vacuum interrupter opening and closing induction current, it comprises earthed switch body and subsidiary loop, this earthed switch body mainly comprises fixed contact (4), operator lock (5), ground connection rotating shaft (6), base (7), operating mechanism (8) and porcelain vase (13), wherein the operate lower end of lock (5) is fixed on the base (7), base (7) is connected with operating mechanism (8), porcelain vase (13) is fixed on the base (7), fixed contact (4) is fixed on porcelain vase (13) upper end, and it is characterized in that: described subsidiary loop comprises quiet arc contact (3), moving arcing contact (1), vacuum interrupter assembling (11) and the operating mechanism that is used for controlling vacuum interrupter assembling (11); Quiet arc contact (3) is connected as a single entity with fixed contact (4), and moving arcing contact (1) is articulated in the top of operator lock (5) and links to each other with vacuum interrupter assembling (11) by flexible insulation lead (15); Vacuum interrupter assembling (11) is fixed on the base (7), and the lower end of this vacuum interrupter assembling (11) links to each other with operating mechanism.
2, the earthed switch that utilizes the vacuum interrupter opening and closing induction current according to claim 1, it is characterized in that: described vacuum interrupter assembling (11) mainly comprises vacuum interrupter (17), lid (25), insulating sleeve (16), outer steel sleeve (18), interior steel bushing (19), overtravel spring (20), tripping spring (21) and roller (22), wherein vacuum interrupter (17) upper end is fixed on the lid (25), and lid (25) then is fixed on insulating sleeve (16) top; In vacuum interrupter (17) lower end, interior steel bushing (19) closely connects together with the moving contact of vacuum interrupter (17), and outer steel sleeve (18) slides on the outer ring of interior steel bushing (19), and tripping spring (21) is enclosed between inside and outside steel bushing (19), (18); The overtravel spring is arranged in the interior steel bushing (19), and roller (22) then is set in the interior steel bushing (19), and insulating sleeve (16) bottom and underframe (29) are fixed together.
3, the earthed switch that utilizes the vacuum interrupter opening and closing induction current according to claim 1 and 2 is characterized in that: the described operating mechanism that is used for controlling vacuum interrupter assembling (11) mainly comprises shift fork (9), transmission crank arm (10), step-less adjustment ring flange (12), cam (23), switching-in spring device (24), limited bolt (25), sliding piece (26), rotating shaft (27), connecting lever (28), underframe (29); This underframe (29) is connected on the base (7), and shift fork (9) is fixed in the ground connection rotating shaft (6); Transmission crank arm (10) is connected in an end of rotating shaft (27), and the other end of rotating shaft (27) then is half-moon-shaped; A side of underframe (29) is passed in rotating shaft (27), be arranged with cam (23), connecting lever (28), sliding piece (26) in the rotating shaft (27) successively, little pin on the cam (23) falls in the oval groove of connecting lever (28), the first quarter moon profile shaft of the half-moon-shaped hole of sliding piece (26) and rotating shaft (27) other end is connected, and switching-in spring device (24) is connected with connecting lever (28).
4, the earthed switch that utilizes the vacuum interrupter opening and closing induction current according to claim 3, it is characterized in that: an end of described flexible insulation lead (15) links to each other with moving arcing contact (1), the other end then links to each other with vacuum interrupter (17), and two ends all adopt the crimping mode to connect.
5, the earthed switch that utilizes the vacuum interrupter opening and closing induction current according to claim 3, it is characterized in that: described quiet arc contact (3) and two stands (2) with bolted together, two stands (2) assembles in aggregates with the fixed contact (4) of earthed switch by bolt.
6, the earthed switch that utilizes the vacuum interrupter opening and closing induction current according to claim 3, it is characterized in that: described moving arcing contact (1) is installed on the top of the operator lock (5) of earthed switch by silicon rubber insulator (14), and moving arcing contact (1) is rotary hinge form with silicon rubber insulator (14) between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050696 CN2805158Y (en) | 2005-04-07 | 2005-04-07 | Earthing switch by using vacuum arc-chutes open/close induction current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050696 CN2805158Y (en) | 2005-04-07 | 2005-04-07 | Earthing switch by using vacuum arc-chutes open/close induction current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2805158Y true CN2805158Y (en) | 2006-08-09 |
Family
ID=36910441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520050696 Expired - Lifetime CN2805158Y (en) | 2005-04-07 | 2005-04-07 | Earthing switch by using vacuum arc-chutes open/close induction current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2805158Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138169A (en) * | 2011-11-22 | 2013-06-05 | 北京双杰电气股份有限公司 | Grounding mechanism |
| CN104124104A (en) * | 2013-04-25 | 2014-10-29 | 国家电网公司 | Earthing switch with capability of switching induced current |
| CN107170632A (en) * | 2016-03-08 | 2017-09-15 | 湖南长高高压开关有限公司 | Major loop extra-high-voltage earthing switch with opening and closing induction current in parallel with arc-chutes |
| CN109637885A (en) * | 2018-12-19 | 2019-04-16 | 厦门顾德益电器有限公司 | A kind of switch spindle transmission device |
-
2005
- 2005-04-07 CN CN 200520050696 patent/CN2805158Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138169A (en) * | 2011-11-22 | 2013-06-05 | 北京双杰电气股份有限公司 | Grounding mechanism |
| CN103138169B (en) * | 2011-11-22 | 2016-04-13 | 北京双杰电气股份有限公司 | Earthing mechanism |
| CN104124104A (en) * | 2013-04-25 | 2014-10-29 | 国家电网公司 | Earthing switch with capability of switching induced current |
| CN104124104B (en) * | 2013-04-25 | 2016-08-03 | 国家电网公司 | A kind of earthed switch with opening and closing induction current ability |
| CN107170632A (en) * | 2016-03-08 | 2017-09-15 | 湖南长高高压开关有限公司 | Major loop extra-high-voltage earthing switch with opening and closing induction current in parallel with arc-chutes |
| CN107170632B (en) * | 2016-03-08 | 2019-10-08 | 湖南长高高压开关有限公司 | Major loop extra-high-voltage earthing switch with opening and closing induction current in parallel with arc-chutes |
| CN109637885A (en) * | 2018-12-19 | 2019-04-16 | 厦门顾德益电器有限公司 | A kind of switch spindle transmission device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2796202Y (en) | Gas insulation metal sealed closed switch device | |
| CN2805158Y (en) | Earthing switch by using vacuum arc-chutes open/close induction current | |
| CN201112231Y (en) | Three-station isolation ground switch | |
| CN204966369U (en) | Outdoor high voltage isolator of GW1 | |
| CN201673845U (en) | High-current outdoor isolating switch | |
| CN112216550A (en) | Pole-mounted circuit breaker with built-in isolating switch | |
| CN201853638U (en) | Solid insulating three-position electrical isolation device and isolation unit | |
| CN202662524U (en) | Extra-high voltage grounding switch using SF6 arc extinguish chamber for inducing current | |
| CN2817142Y (en) | Small-sized gas-insulated metal closed switch device | |
| CN202797732U (en) | Novel solid insulating switchgear | |
| CN209730633U (en) | A kind of gas-filling cabinet modular switching device | |
| CN2796203Y (en) | Box type gas insulation metal seal closed switch device | |
| CN107170632B (en) | Major loop extra-high-voltage earthing switch with opening and closing induction current in parallel with arc-chutes | |
| CN216353922U (en) | Switching bus current conversion device of high-voltage isolating switch | |
| CN201060787Y (en) | Outdoors vacuum breaker | |
| CN2814739Y (en) | Outdoor high voltage opening combined electric appliance | |
| CN2817040Y (en) | Three-position isolation switch | |
| CN204349222U (en) | A kind of switch cubicle isolating switch | |
| CN204349314U (en) | A kind of solid insulation vacuum switch cabinet with insulation bus system | |
| CN2772009Y (en) | High-voltage tripolar vacuum contactor | |
| CN202034296U (en) | Combined switch for switching of double high-voltage power sources | |
| CN205406377U (en) | Major loop is established ties with induced -current's that opens and shuts superhigh pressure earthing switch with explosion chamber | |
| CN204349273U (en) | A kind of cabinet of solid insulation vacuum switch cabinet | |
| CN1283031C (en) | Gas-filled type ring net switch equipment | |
| CN209591897U (en) | A kind of gas-filling cabinet direct action type three-station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUNAN CHANGGAO HIGH VOLTAGE SWITCH GROUP STOCK CO. Free format text: FORMER NAME OR ADDRESS: CHANGSHA HIGH VOLTAGE SWITCHGEAR CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: West side of Jinxing Road, Hunan high tech food industry base, Changsha, Hunan Province: 410219 Patentee after: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR GROUP CO., LTD. Address before: 69, Kui Road, Changsha, Hunan, China: 410004 Patentee before: Changsha High-voltage Switch Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150407 Granted publication date: 20060809 |