CN101969006B - Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch - Google Patents
Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch Download PDFInfo
- Publication number
- CN101969006B CN101969006B CN 201010257283 CN201010257283A CN101969006B CN 101969006 B CN101969006 B CN 101969006B CN 201010257283 CN201010257283 CN 201010257283 CN 201010257283 A CN201010257283 A CN 201010257283A CN 101969006 B CN101969006 B CN 101969006B
- Authority
- CN
- China
- Prior art keywords
- isolating switch
- loop
- state
- conducting
- subsidiary loop
- 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
- 238000000034 method Methods 0.000 title claims abstract description 75
- 230000008569 process Effects 0.000 claims description 63
- 230000001052 transient effect Effects 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 description 13
- 238000007796 conventional method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention belongs to the technical field of ultra-high voltage power transmission, in particular to a method for improving the converted current switching capability of an ultra-high voltage open alternating current isolating switch. Auxiliary circuits are added on a main contact to switch converted current, and isolating switches are used to guide the operation of electric poles, so that the converted current switching capability of the isolating switches can be greatly improved, and the use requirements for connecting the isolating switches in parallel can be met. Thus, by using the method, the converted current switching capability is greatly improved, the requirements for connecting the isolating switches in parallel are easily met, the influence of electric arcs is almost completely eliminated, the operation and the control of the isolating switches are greatly simplified, the cost is lowered and the reliability is improved.
Description
Technical field
The invention belongs to the UHV transmission technical field, be specifically related to a kind of method that improves ultra high voltage open type AC isolation switch switching current folding ability.
Background technology
In order to improve the conveying capacity of UHV transmission line, improve the stability of a system, need to install on the line the extra-high voltage series compensation device, parallel-connection isolation switch is mended switching of device operational mode for going here and there, be important operating equipment, usually adopt the open type AC isolation switch.Extra-high voltage series compensation requires switching current folding ability to meet switching current 6300A, changing voltage 6000V with parallel-connection isolation switch.According to current standard, the high parameter of conventional isolating switch switching current folding ability is switching current 1600A, changing voltage 400V, can't directly meet the parallel-connection isolation switch user demand at all, needs to find the method that improves switching current folding ability.
The conventional method that improves isolating switch switching current folding ability is to improve arc-rupturing capacity by elongating arc, and the arcing contact striking of making by employing arc ablation resistance material is to alleviate the harm of arc erosion, improve the switching current folding limited in one's ability, be difficult to meet the requirement of the high switching current folding of parallel-connection isolation switch.
Improve the conventional method technical disadvantages of isolating switch switching current folding ability:
● carry out blow-out by elongating air arc, connecting-disconnecting function is very limited, and is subject to environmental influence very large;
● can produce serious unlimited air arc, its ablation and diffusion meeting switching devices and surrounding devices safe operation thereof cause and have a strong impact on.
● it is limited in one's ability to improve folding, and can only meet the high parameter of existing standard regulation: switching current 1600A, changing voltage 400V can't meet the switching current folding requirement of parallel-connection isolation switch switching current 6300A, changing voltage 6000V.
The present invention proposes a kind of method of new raising isolating switch switching current folding ability, by install subsidiary loop folding switching current additional on main contact, and utilize the operation of isolated switch main conducting rod, can increase substantially the switching current folding ability of isolating switch, meet the user demand of parallel-connection isolation switch.
The method of the raising isolating switch switching current folding ability that the present invention proposes is in the past without similar technical scheme.
Summary of the invention
The present invention proposes a kind of method of new raising isolating switch switching current folding ability, by install subsidiary loop folding switching current additional on main contact, and utilize the isolated switch main conducting rod to operate, can increase substantially the switching current folding ability of isolating switch, meet the user demand of parallel-connection isolation switch.
A kind of method that improves converted current switching capability of ultra-high voltage alternating current open isolating switch of the present invention, is characterized in that
By install subsidiary loop folding switching current additional on main contact, and utilize the operation of isolated switch main conducting rod, can increase substantially the switching current folding ability of isolating switch;
Comprise the following steps:
1) isolating switch closes process
(1) before isolating switch closes, main contact is off-state, and auxiliary contact is off-state, and vacuum circuit-breaker is gate-dividing state; Major loop and subsidiary loop are all off-states, there is no electric current in circuit;
(2) at isolating switch, close in first transient process in process, auxiliary contact is connected, and vacuum circuit-breaker is in gate-dividing state, and subsidiary loop does not have conducting; Main contact is off-state, and major loop does not have conducting; There is no electric current in circuit;
(3) at isolating switch, close in second transient process in process, auxiliary contact is closure state, and vacuum circuit-breaker starts to close a floodgate, and completes closing of 8000A and following electric current under 12kv and following voltage, and now whole subsidiary loop is connected; Main contact is off-state, and major loop does not have conducting.Electric current in circuit flows through by subsidiary loop;
(4) at isolating switch, close in the 3rd transient process in process, auxiliary contact is closure state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected; Because subsidiary loop is conducting, main contact is connected under the condition that almost there is no prebreakdown, can guarantee that main contact is not burnt or slight scaling loss, major loop conducting immediately; Electric current in circuit flows through by major loop and subsidiary loop parallel connection;
(5) close the final state in process at isolating switch, auxiliary contact disconnects, and vacuum circuit-breaker is still "on" position, and whole subsidiary loop disconnects; Main contact is closure state, the major loop conducting.Electric current in circuit flows through by major loop; So far, isolating switch has completed the process of closing, in "on" position;
2) isolating switch interrupting process
(1) initial condition in the isolating switch interrupting process, auxiliary contact is off-state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop disconnects; Main contact is on-state, the major loop conducting; Electric current in circuit flows through by major loop;
(2) in first transient process in the isolating switch interrupting process, auxiliary contact is connected, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected; Main contact is on-state, the major loop conducting.Electric current in circuit flows through by major loop and subsidiary loop parallel connection;
(3) in second transient process in the isolating switch interrupting process, auxiliary contact is closure state, and vacuum circuit-breaker is "on" position, whole subsidiary loop conducting.Because subsidiary loop is conducting, main contact disconnects under the condition that almost there is no recovery voltage, reduces even to have avoided main contact generation arcing, and then guarantees that main contact is not burnt or slight scaling loss; Electric current in circuit flows through by subsidiary loop;
(4) in the 3rd transient process in the isolating switch interrupting process, auxiliary contact is closure state, and vacuum circuit-breaker starts separating brake, cut-offs 8000A and following electric current and bears 12kv and following recovery voltage, and now subsidiary loop disconnects; Main contact is off-state, not conducting of major loop.Whole circuit does not have electric current to flow through;
(5) final state in the isolating switch interrupting process, auxiliary contact disconnects, and vacuum circuit-breaker is gate-dividing state, and main contact is off-state, and major loop and subsidiary loop are all off-states, there is no electric current in circuit; So far, isolating switch has completed interrupting process, in gate-dividing state;
3) operation of subsidiary loop
In the isolator operation process, the isolating switch operating mechanism can operate leading electric pole action, can drive the subsidiary loop operation in leading electric pole course of action, thereby realize by the operation of isolating switch operating mechanism, guaranteed that by mechanical location and structure the action sequence of subsidiary loop and major loop coordinates.
The method and technology advantage of the raising isolating switch switching current folding ability that the present invention proposes:
(1) switching current folding ability depends primarily on the vacuum circuit-breaker in subsidiary loop, and switching current folding ability can be very high, easily meets the parallel-connection isolation switch requirement;
(2) electric arc is sealed in the vacuum extinction chamber interior, can with external equipment, not exert an influence to vacuum interrupter;
(3) utilize isolated switch main conducting rod operation vacuum circuit-breaker, vacuum circuit breaker operating and control are simplified greatly, cost, and reliability improves.
The solution of the invention improve the technical disadvantages of the conventional method of isolating switch switching current folding ability, easily just can meet the high changing voltage of parallel-connection isolation switch, large switching current folding Capability Requirement, and simple and reliable, realize easily, and the saving cost, have very high Technological Economy and be worth and application prospect.
The accompanying drawing explanation
In order to make content of the present invention by clearer understanding, and be convenient to the description of embodiment, below provide accompanying drawing related to the present invention and be described as follows:
Fig. 1 is electrical block diagram of the present invention.
Fig. 2-6 show respectively the detail drawing that isolating switch closes the five steps of process.
Fig. 7-11 show respectively the detail drawing of the five steps of isolating switch interrupting process.
Embodiment
The explanation of nouns of relevant technical terms
Series compensation (being called for short " string is mended "): it is anti-to reduce a kind of technology of circuit total impedance that utilization series connection access in the line capacitor group is offset the partial line road feel, can increase substantially circuit transmission capacity and the stability of a system.
Isolating switch: when open position, the insulation distance of requirement up to specification is arranged between contact and significantly disconnect sign; When closing position, can carry electric current under normal loop condition and the switchgear of for example, electric current under exceptional condition (short circuit) in official hour.
Annotate: when loop current " very little ", or when the voltage between two terminals of the every utmost point of isolating switch when closing and cut-off front and back without marked change, isolating switch has closing and cut-offs the ability in loop.
The series compensation device parallel-connection isolation switch: be connected in transmission line, in parallel with series compensation device, for the isolating switch of switching series compensation device.
The folding switching current: will load when from transmission line, transferring to series compensation device or transferring to transmission line from series compensation device, isolating switch is having cut-offfing of carrying out under the carrier strip part and is closing closing operation.
The technical solution of the present invention know-why:
● install the subsidiary loop formed by auxiliary contact and vacuum circuit-breaker additional on the contact of isolating switch, utilize the leading electric pole operation of isolating switch, by the cooperation of mechanical location and structure, realize the following time sequential routine:
● when isolating switch closes closing operation, leading close-main contact of close-vacuum circuit-breaker of electric pole action-auxiliary contact closes;
● when isolating switch cut-offs operation, leading cut-off-auxiliary contact of cut-off-vacuum circuit-breaker of electric pole action-main contact cut-offs;
Technical solution of the present invention elaborates:
As shown in Figure 1, branch road 1 is the subsidiary loop that this programme proposes to install additional, and subsidiary loop comprises auxiliary contact and vacuum circuit-breaker.Branch road 2 is major loops, and major loop comprises main contact.This programme has installed subsidiary loop additional just to improve the ability of switching current folding.Detailed process is as described below:
1) isolating switch closes process (referring to Fig. 2-6)
(1) state that Fig. 2 is each fracture before isolating switch closes, now main contact is off-state, and auxiliary contact is off-state, and vacuum circuit-breaker is gate-dividing state.Major loop and subsidiary loop are all off-states, there is no electric current in circuit.
(2) Fig. 3 is that isolating switch closes first transient process in process, and now auxiliary contact is connected, and vacuum circuit-breaker is in gate-dividing state, and subsidiary loop does not have conducting.Main contact is off-state, and major loop does not have conducting, there is no electric current in circuit.
(3) Fig. 4 is that isolating switch closes second transient process in process, and now auxiliary contact is closure state, and vacuum circuit-breaker starts to close a floodgate, and completes closing of 8000A and following electric current under 12kV and following voltage, and now whole subsidiary loop is connected.Main contact is off-state, and major loop does not have conducting.Electric current in circuit flows through by subsidiary loop.
(4) Fig. 5 is that isolating switch closes the 3rd transient process in process, and now auxiliary contact is closure state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected.Because subsidiary loop is conducting, main contact is connected under the condition that almost there is no prebreakdown, can guarantee that main contact is not burnt or slight scaling loss, major loop conducting immediately.Electric current in circuit flows through by major loop and subsidiary loop parallel connection.
(5) Fig. 6 is that isolating switch closes the final state in process, and now auxiliary contact disconnects, and vacuum circuit-breaker is still "on" position, and whole subsidiary loop disconnects.Main contact is closure state, the major loop conducting.Electric current in circuit flows through by major loop.So far, isolating switch has completed the process of closing, in "on" position.
2) isolating switch interrupting process (referring to Fig. 7-11)
(1) Fig. 7 is the initial condition in the isolating switch interrupting process, and now auxiliary contact is off-state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop disconnects.Main contact is on-state, the major loop conducting.Electric current in circuit flows through by major loop.
(2) Fig. 8 is first transient process in the isolating switch interrupting process, and now auxiliary contact is connected, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected.Main contact is on-state, the major loop conducting.Electric current in circuit flows through by major loop and subsidiary loop parallel connection.
(3) Fig. 9 is second transient process in the isolating switch interrupting process, and now auxiliary contact is closure state, and vacuum circuit-breaker is "on" position, whole subsidiary loop conducting.Because subsidiary loop is conducting, main contact disconnects under the condition that almost there is no recovery voltage, reduces even to have avoided main contact generation arcing, and then guarantees that main contact is not burnt or slight scaling loss.Electric current in circuit flows through by subsidiary loop.
(4) Figure 10 is the 3rd transient process in the isolating switch interrupting process, and now auxiliary contact is closure state, and vacuum circuit-breaker starts separating brake, cut-offs 8000A and following electric current and bears 12kV and following recovery voltage, and now subsidiary loop disconnects.Main contact is off-state, not conducting of major loop.Whole circuit does not have electric current to flow through.
(5) Figure 11 is the final state in the isolating switch interrupting process, and now auxiliary contact disconnects, and vacuum circuit-breaker is gate-dividing state, and main contact is off-state, and major loop and subsidiary loop are all off-states, there is no electric current in circuit.So far, isolating switch has completed interrupting process, in gate-dividing state.
3) operation of subsidiary loop
In the isolator operation process, the isolating switch operating mechanism can operate leading electric pole action, can drive the subsidiary loop operation in leading electric pole course of action, thereby realize being operated by the isolating switch operating mechanism, the subsidiary loop guaranteed by mechanical location and structure and the action sequence of major loop coordinate, make isolator operation and control greatly and simplify, reliability improves, and cost descends.
In sum, by installing subsidiary loop additional and utilizing leading electric pole operation, can increase substantially ultra high voltage open isolating switch switching current folding ability, meet the requirement of extra-high voltage series compensation with the folding of parallel-connection isolation switch switching current.
The above by special embodiment content description the present invention, but those skilled in the art also can recognize the multiple possibility of modification and optional embodiment, for example, by combination and/or change the feature of single embodiment.Therefore, be understandable that these modification and optional embodiment will be considered as included in the present invention, scope of the present invention is enclosed patent claims and coordinate restriction thereof only.
Claims (1)
1. a method that improves converted current switching capability of ultra-high voltage alternating current open isolating switch, is characterized in that
By install subsidiary loop folding switching current additional on main contact, and utilize the operation of isolated switch main conducting rod, can increase substantially the switching current folding ability of isolating switch;
Comprise the following steps:
1) isolating switch closes process
(1) before isolating switch closes, main contact is off-state, and auxiliary contact is off-state, and vacuum circuit-breaker is minute
The lock state; Major loop and subsidiary loop are all off-states, there is no electric current in circuit;
(2) at isolating switch, close in first transient process in process, auxiliary contact is connected, and vacuum circuit-breaker is in gate-dividing state, and subsidiary loop does not have conducting; Main contact is off-state, and major loop does not have conducting; There is no electric current in circuit;
(3) at isolating switch, close in second transient process in process, auxiliary contact is closure state, and vacuum circuit-breaker starts to close a floodgate, and completes closing of the following electric current of 8000A under the following voltage of 12kv, now whole subsidiary loop connection; Main contact is off-state, and major loop does not have conducting, and the electric current in circuit flows through by subsidiary loop;
(4) at isolating switch, close in the 3rd transient process in process, auxiliary contact is closure state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected; Because subsidiary loop is conducting, main contact is connected under the condition that almost there is no prebreakdown, can guarantee that main contact is not burnt or slight scaling loss, major loop conducting immediately; Electric current in circuit flows through by major loop and subsidiary loop parallel connection;
(5) close the final state in process at isolating switch, auxiliary contact disconnects, and vacuum circuit-breaker is still "on" position, and whole subsidiary loop disconnects; Main contact is closure state, the major loop conducting, and the electric current in circuit flows through by major loop; So far, isolating switch has completed the process of closing, in "on" position;
2) isolating switch interrupting process
(1) initial condition in the isolating switch interrupting process, auxiliary contact is off-state, and vacuum circuit-breaker is "on" position, and whole subsidiary loop disconnects; Main contact is on-state, the major loop conducting; Electric current in circuit flows through by major loop;
(2) in first transient process in the isolating switch interrupting process, auxiliary contact is connected, and vacuum circuit-breaker is "on" position, and whole subsidiary loop is connected; Main contact is on-state, the major loop conducting, and the electric current in circuit flows through by major loop and subsidiary loop parallel connection;
(3) in second transient process in the isolating switch interrupting process, auxiliary contact is closure state, vacuum circuit-breaker is "on" position, whole subsidiary loop conducting, because subsidiary loop is conducting, main contact disconnects under the condition that almost there is no recovery voltage, reduces even to have avoided main contact generation arcing, and then guarantees that main contact is not burnt or slight scaling loss; Electric current in circuit flows through by subsidiary loop;
(4) in the 3rd transient process in the isolating switch interrupting process, auxiliary contact is closure state, and vacuum circuit-breaker starts separating brake, cut-offs the following electric current of 8000A and bears the following recovery voltage of 12kv, and now subsidiary loop disconnects; Main contact is off-state, not conducting of major loop, and whole circuit does not have electric current to flow through;
(5) final state in the isolating switch interrupting process, auxiliary contact disconnects, and vacuum circuit-breaker is gate-dividing state, and main contact is off-state, and major loop and subsidiary loop are all off-states, there is no electric current in circuit; So far, isolating switch has completed interrupting process, in gate-dividing state;
3) operation of subsidiary loop
In the isolator operation process, the isolating switch operating mechanism can operate leading electric pole action, can drive the subsidiary loop operation in leading electric pole course of action, thereby realize by the operation of isolating switch operating mechanism, guaranteed that by mechanical location and structure the action sequence of subsidiary loop and major loop coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010257283 CN101969006B (en) | 2010-08-19 | 2010-08-19 | Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010257283 CN101969006B (en) | 2010-08-19 | 2010-08-19 | Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101969006A CN101969006A (en) | 2011-02-09 |
| CN101969006B true CN101969006B (en) | 2013-12-18 |
Family
ID=43548145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010257283 Active CN101969006B (en) | 2010-08-19 | 2010-08-19 | Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101969006B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2980633B1 (en) * | 2011-09-27 | 2013-09-06 | Schneider Electric Ind Sas | MEDIUM VOLTAGE POWER DISTRIBUTION APPARATUS |
| CN102646539B (en) * | 2012-03-23 | 2014-07-23 | 国家电网公司 | Bypass isolating switch for 1100-kV super-high-voltage serial compensation |
| CN104134567B (en) * | 2013-05-17 | 2016-06-01 | 国家电网公司 | Isolator breaking device and use the isolator of this breaking device |
| CN104134566B (en) * | 2013-05-17 | 2017-02-01 | 国家电网公司 | Large-current breaking device for isolation switch and isolation switch using same |
| CN106680702B (en) * | 2016-12-22 | 2019-09-17 | 中国西电电气股份有限公司 | A kind of raised circuit of disconnecting switch electric current folding ability test limitation voltage and method |
| CN114362093B (en) * | 2022-03-16 | 2022-07-08 | 清华大学 | High-capacity alternating current circuit breaker based on capacitance commutation and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1271955A (en) * | 1999-04-23 | 2000-11-01 | 肖新凯 | Long-service silver-saving switch appliance with arc transfer contact |
| CN1885466A (en) * | 2006-06-12 | 2006-12-27 | 宁波天安（集团）股份有限公司 | Switch device of parallel connection vacuum arc extinguishing chamber |
| CN201327782Y (en) * | 2008-09-24 | 2009-10-14 | 郭桥石 | Surgeless contactor arc extinguisher |
| CN101710548A (en) * | 2009-12-01 | 2010-05-19 | 艾默生网络能源有限公司 | Blow-out circuit of relay and method |
-
2010
- 2010-08-19 CN CN 201010257283 patent/CN101969006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1271955A (en) * | 1999-04-23 | 2000-11-01 | 肖新凯 | Long-service silver-saving switch appliance with arc transfer contact |
| CN1885466A (en) * | 2006-06-12 | 2006-12-27 | 宁波天安（集团）股份有限公司 | Switch device of parallel connection vacuum arc extinguishing chamber |
| CN201327782Y (en) * | 2008-09-24 | 2009-10-14 | 郭桥石 | Surgeless contactor arc extinguisher |
| CN101710548A (en) * | 2009-12-01 | 2010-05-19 | 艾默生网络能源有限公司 | Blow-out circuit of relay and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101969006A (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101969006B (en) | Method for improving converted current switching capability of ultra-high voltage alternating current open isolating switch | |
| EP2624274B1 (en) | Hybrid current switching device | |
| CN103337852B (en) | A kind of direct current network breaking device | |
| CN204303660U (en) | A kind of single arc-chutes double-fracture breaker | |
| CN201060794Y (en) | Vacuum breaker | |
| CN201266574Y (en) | High-voltage vacuum breaker for back-to-back double explosion chambers | |
| CN101866773A (en) | Three-post horizontally turning type extra-high voltage series compensation parallel-connection isolation switch | |
| US20220037098A1 (en) | Switching apparatus of the hybrid type | |
| CN201465887U (en) | Switching switch of high voltage reactive compensation capacitor | |
| CN204760332U (en) | Circuit breaker operating device controlgear and control box thereof | |
| CN211654684U (en) | Double-acting coupling type contact switch with variable electrode shape | |
| CN107154609A (en) | A kind of high reliability high-speed switch type fault current limiter | |
| CN113517155A (en) | Vacuum isolation arc-extinguishing device | |
| CN110783139A (en) | Coupling type contact switch with variable electrode shape and method | |
| CN107710369B (en) | Circuit-breaker | |
| CN103456573A (en) | Breaker and power distribution protection and control method thereof | |
| CN104966648A (en) | Indoor 110kV vacuum circuit breaker body formed by common-pole series-connected breakers in different voltage classes | |
| CN104124102A (en) | Novel alternating-current high-voltage vacuum circuit breaker for electrified railway | |
| CN111739746B (en) | Switch | |
| CN114583677B (en) | Direct current breaker based on mechanical switch series connection and direct current switching-on and switching-off method | |
| CN212303535U (en) | Dual-power solid-sealed polar pole | |
| CN219163255U (en) | Breaker of normal pressure cabinet | |
| CN203070999U (en) | V-shaped series-structure ultrahigh-voltage vacuum circuit breaker | |
| CN213879270U (en) | Current-limiting type direct current breaker | |
| CN207690699U (en) | A kind of electric switch with high voltage auxiliary contact |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20130715 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130715 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant after: China Electric Power Research Institute Applicant after: State Grid Corporation of China Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Applicant before: China Electric Power Research Institute |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |