CN1862741A - Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker - Google Patents
Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker Download PDFInfo
- Publication number
- CN1862741A CN1862741A CN 200610077939 CN200610077939A CN1862741A CN 1862741 A CN1862741 A CN 1862741A CN 200610077939 CN200610077939 CN 200610077939 CN 200610077939 A CN200610077939 A CN 200610077939A CN 1862741 A CN1862741 A CN 1862741A
- Authority
- CN
- China
- Prior art keywords
- contact
- resistance
- moving contact
- arc
- arc extinguishing
- 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.)
- Granted
Links
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Abstract
This invention relates to electric equipment using extra high voltage breaker multilevel arc extinction breaking device. The main contact, arc extinction contact and resistance contact set in the insulating barrel and using spring floating connecting form static contact to execute switch on and off action. The main contact, arc extinction moving contact and resistance form the moving contact. The problem of electric arc burning the main contact can be avoided because of the minimum interstice between the main contacts, the small interstice between the arc extinctions and the maximum between resistances, and the main contacts separate first and last joint in feed motion. Switching on over voltage can also be avoided because of ahead connection of on and off resistance during on and off process.
Description
Technical field
The present invention relates to the multi-stage arc suppressing breaking device for extra-high voltage circuit breaker that a kind of power equipment uses.
Background technology
The power equipment switch all needs break contact, The faster the better, the time is short more good more to require breaking speed in the time of as high pressure or breaker in extra high voltage use, because the moving contact of high voltage electric equipment and fixed contact are easy to generate electric arc in the time of approaching, the time of the fast more generation electric arc of speed is short more, and is more little to the infringement of equipment.In addition, the alive circuit that long distance is non-loaded or load is very little minute, can in electrical network, form very high overvoltage when closing a floodgate.If the special equipment of these overvoltage neither ones is limited, in extra-high voltage grid, will take the transition insulation measures so, and this will inevitably increase considerably cost.The effective way of over-voltage is exactly to come these circuit are switched with the circuit breaker that branch, switching-on resistance be housed, and divides, switching-on resistance can be with overvoltage Limiting a relatively low level.The existing primary cut-out contact that has switching-on resistance, FXT16D type SF6 contact of breaker with Alstom (China) company (ALSTOM) is representative, be made up of the moving contact and the fixed contact that are installed in the insulation cavity, fixed contact is fixedly mounted in the insulation cavity, is connected with switching-on resistance; Moving contact is hinged on the insulated tension pole, the speed of related movement of moving contact and fixed contact depends on the movement velocity of insulated tension pole, in order to improve the breaking speed of switch, has only the movement velocity that improves insulated tension pole, and this can increase substantially production cost power consumption then, the movement velocity of insulated tension pole can cause bigger motion impulsive force again after improving simultaneously, influences the useful life of equipment.I provide a kind of high speed break contact at another patent " four pole multi speed disjunction contact of extra-high-voltage breaker " of application, when separating brake moves, moving contact and fixed contact move simultaneously in the opposite direction, have greatly improved the breaking speed of contact, and the breaking capacity of circuit breaker is greatly improved.But this contact only inserts switching-on resistance when closing a floodgate, can avoid closing overvoltage, when being applied to than long transmission line, but can not avoid the gate-dividing super-voltage phenomenon.
Summary of the invention
The purpose of this invention is to provide a kind of simple and reasonable for structure reliable, with low cost, breaking speed is fast, and the multi-stage arc suppressing breaking device for extra-high voltage circuit breaker of branch, switching-on resistance is installed simultaneously.
For achieving the above object, the present invention adopts following technical scheme:
Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker of the present invention, comprise shell, be installed in the insulating cylinder in the shell and be arranged on fixed contact and moving contact in the insulating cylinder, fixed contact comprises the insulation guide plate that is fixedly installed in the insulating cylinder and is inserted into main contacts, resistance contact point and the arcing contact of insulation on the guide plate, main contacts, resistance contact point and arcing contact are connected with insulation guide plate elasticity by spring respectively, main contacts is electrically connected by flexible conductor with the arcing contact, and the end of main contacts is electrically connected with connecting plate; Elastic movement gap between main contacts and the insulation guide plate is less than the elastic movement gap between arcing contact and the insulation guide plate; Elastic movement gap between resistance contact point and the insulation guide plate is greater than the elastic movement gap between arcing contact and the insulation guide plate; The end of resistance contact point is electrically connected with connecting plate by branch, switching-on resistance;
Moving contact comprises the interior insulation support plate that is fixedly installed in the insulating cylinder, external insulation supporting bracket and be inserted into arc extinguishing moving contact in the two-layer insulation support plate, on the arc extinguishing moving contact between interior insulation support plate and the external insulation supporting bracket, be installed with conductive plate, initiatively contact and resistance moving contact are fixed together by this conductive plate and arc extinguishing moving contact, the active contact, the resistance moving contact, the arc extinguishing moving contact is inserted on the interior insulation support plate, its position respectively with main contacts, resistance contact point, the arcing contact is corresponding, on the interior insulation support plate with the resistance moving contact, the corresponding position of arc extinguishing moving contact is provided with cylinder sleeve, the resistance moving contact, the stage casing of arc extinguishing moving contact has piston, and form piston with the inwall of cylinder sleeve and cooperate, the end of arc extinguishing moving contact has connecting plate.
Described insulating cylinder comprises urceolus and is sleeved on inner core in the urceolus, and inner core is a segmental structure, and insulation guide plate, interior insulation support plate and external insulation supporting bracket are installed in the junction of each segmentation of inner core.
Under gate-dividing state, main contacts the and initiatively distance between the contact is maximum, the distance between arcing contact and the arc extinguishing moving contact secondly, between resistance contact point and the resistance moving contact apart from minimum.
The arcing contact be positioned at the insulation guide plate the center, a plurality of main contactss and resistance contact point be looped around the arcing contact around.
One side of arc extinguishing moving contact and resistance moving contact is provided with the arc blow-out pipe, and the top of arc blow-out pipe is respectively towards the top of arc extinguishing moving contact and resistance moving contact, its lower end run through the arc extinguishing moving contact or and the resistance moving contact on boss be communicated to opposite side; Have the exhaust outlet that unidirectional valve is installed on the boss.
The arcing contact is positioned at the center of insulation guide plate, other have three main contactss and three resistance contact points be looped around the arcing contact around; The branch, the switching-on resistance that are divided into three groups are electrically connected with three resistance contact points respectively.
After adopting technique scheme, the present invention has following advantage:
1, adopts the classification arcing contact, efficiently solve branch, switching-on resistance access time difference problem, can under an operating mechanism, make breaker in extra high voltage.
2, owing to adopt the classification arcing contact, main contact minute, can not produce electric arc in the making process, can effectively increase the service life.
3, because all contacts are worked,, solved the problem of breaker in extra high voltage switching overvoltage reliably, effectively under an operating mechanism so time difference cooperation is accurate between each contact.
4,, simpler than the structural manufacturing process of the single main contact of tradition, contact is more reliable, rated current is bigger owing to adopt a plurality of main contact annular array.
5, each contact all adopts doubly fast disjunction, and opening velocity is fast, and rupturing capacity is big.
6, operand power is little, volume is little, easy to install.
7, applied widely, can be used for extra-high voltage GIS combined electrical apparatus, canned circuit breaker and column type circuit breaker.Also can be used in the extra high voltage circuit breaker.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the present of invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Embodiment
As shown in drawings, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker of the present invention comprises shell 1, is installed in the insulating cylinder 7 in the shell 1 and is arranged on fixed contact and moving contact in the insulating cylinder 7.Have air chamber 77 between shell 1 and the insulating cylinder 7, can fill out in the air chamber 77, to improve insulation effect towards insulating gass such as SF6.In addition, for ease of installing, insulating cylinder 7 is designed to the structure of can segmentation installing.Insulating cylinder 7 comprises urceolus and is sleeved on inner core in the urceolus, and inner core is a segmental structure, and the parts of horizontally sets such as insulation guide plate 34, interior insulation support plate 72 and external insulation supporting bracket 73 are installed in the junction of each segmentation of inner core.In the production process, as long as sectional assembly segmentation is fitted together.Fixed contact comprises the insulation guide plate 34 that is fixedly installed in the insulating cylinder 7 and is inserted into main contacts 31, resistance contact point 32 and the arcing contact 33 of insulation on the guide plate 34.Arcing contact 33 is positioned at the center of insulation guide plate 34, spring 10 is sleeved on the arcing contact 33, and by be fixed on the arcing contact 33 spring base with spring 10 be fixed on spring base and the insulation guide plate 34 between, be fixed with the positioning tube 101 of tubular on the insulation guide plate 34 of spring base below, be enclosed within the outside of spring 10.The effect of positioning tube 101 is spring can be located on the one hand, also just can adjust the movement clearance of arcing contact 33 by the height of adjusting positioning tube 101 on the other hand, so that match with the time difference of other contacts.As Fig. 2, shown in Figure 3, main contacts 31 and resistance contact point 32 respectively have three, spacer ring around be arranged on arcing contact 33 around.By this belt setting, the diameter of arcing contact 33 is significantly increased, the curvature on top reduces, and can effectively reduce the resume combustion of capacitive electric arc.In addition, main contacts 31 separate with resistance contact point 32 be provided with after, the motional inertia of contact reduces, the speed of help improving branch, closing a floodgate.Branch, switching-on resistance 35 have nine, and its end is electrically connected with connecting plate 37; Branch, switching-on resistance 35 are divided into three groups, are electrically connected with three resistance contact points 32 by lead respectively.The installation method of main contacts 31 and resistance contact point 32 is identical with arcing contact 33, and just according to its different effect, the movement clearance of each contact is different.Elastic movement gap between main contacts 31 and the insulation guide plate 34 is less than the elastic movement gap between arcing contact 33 and the insulation guide plate 34; Elastic movement gap between resistance contact point 32 and the insulation guide plate 34 is greater than the elastic movement gap between arcing contact 33 and the insulation guide plate 34.Concrete numerical value can calculate as required.Do not do further argumentation at this.
For guarantee that main contacts 31 does not produce electric arc when closing a floodgate, guarantee switching-on resistance effective turn-on time, prevent closing overvoltage, under gate-dividing state, should guarantee that the distance between main contacts 31 and the active contact 141 is maximum, distance between arcing contact 33 and the arc extinguishing moving contact 143 secondly, the distance minimum between resistance contact point 32 and the resistance moving contact 142.That is to say that as shown in this embodiment, under the identical situation of each contact length of moving contact, the main contacts 31 on the fixed contact is the shortest, takes second place in arcing contact 33, and resistance contact point 32 is the longest.
Certainly, initiatively the quantity of contact 141, resistance moving contact 142 is not limited to three, also can be two or more.Perhaps change distance between each contact, as long as the distance relation between each contact is with above-mentioned consistent by the length of adjusting each contact on the moving contact.
In addition, molecular sieve 71 devices such as grade can also be set in insulating cylinder 7.In the present embodiment molecular sieve 71 is inlaid on the insulation guide plate 34.Certainly, also can adopt other mounting means, for example molecular sieve 71 can also be arranged in the insulating cylinder 7 as independent one deck.
When contact is initially at engagement state, main contacts 31 contact with contact 141 initiatively, and electric current is directly by active contact 141 and main contacts 31 conductings.When receiving breaking signal, operating mechanism drives moving contact and moves downward, and fixed contact overcomes spring under each contact frictional force effect of moving contact elastic force moves downward together.Meanwhile, spring 10 is compressed under the effect of each contact, and when the spring base lower end on each contact of fixed contact moved to positioning tube 101 places, the tube 101 that is positioned stopped, no longer move downward, and moving contact continues to move downward.
Because the free gap minimum of main contacts 31, what therefore at first disconnect is main contacts 31 and active contact 141.And this moment, resistance contact point 32, arcing contact 33 also engage with resistance moving contact 142, arc extinguishing moving contact 143 respectively, overwhelming majority electric currents are through arcing contact 33 and arc extinguishing moving contact 143, so main contacts 31 and initiatively can not produce electric arc 141 disjunctions of contact the time.
At this moment, moving contact continues to move downward, and separate with arc extinguishing moving contact 143 arcing contact 33, under the double action of brake separating mechanism power and spring force, arcing contact 33 and arc extinguishing moving contact 143 move round about with the relative velocity that doubles brake separating mechanism, and electric arc extinguishes rapidly.When cutting off big electric current, the heat energy that electric arc produces expands arc control device gas rapidly, promotes moving contact and quickens to move downward, and electric arc is extinguished more rapidly.Arc extinguishing efficient during for the little electric current of further raising, side at arc extinguishing moving contact 143 is provided with arc blow-out pipe 145, when arc extinguishing moving contact 143 produces Compressed Gas for 144 li at cylinder sleeve when the separating brake direction moves, these gases blow to arc extinguishing moving contact 143 tops by arc blow-out pipe 145, and electric arc is blown out.The effect that exhaust outlet 41 is set is can pass through exhaust outlet 41 air inlets when arc extinguishing moving contact 143 when the combined floodgate direction moves, avoids producing vacuum in cylinder sleeve 144 speed that influence is closed a floodgate.
Because the elastic movement gap maximum of resistance contact point 32, therefore resistance contact point 32 separates at last with resistance moving contact 142 in the separating brake process.33 separate the about 30 milliseconds of resistance contact points 32 in back and just separate with resistance moving contact 142 with arc extinguishing moving contact 143 in the arcing contact, make branch, switching-on resistance 35 guarantee effective turn-on time when separating brake, can prevent to produce gate-dividing super-voltage.Certainly, concrete parameter can be provided with according to actual needs, is not described further at this.
Because main contacts 31, resistance contact point 32 and arcing contact 33 all are to be connected on the insulation guide plate 34 by spring floating, therefore these three contacts all have the ability of doubly fast disjunction when separating, promptly moving contact and fixed contact move respectively in the opposite direction in separating process, speed of related movement is fast, and arc quenching effect is good.
During feed motion, operating mechanism drives moving contact and moves upward, because resistance contact point 32 is the longest, that is to say that the distance between resistance contact point 32 and the resistance moving contact 142 is minimum, therefore, resistance contact point 32 is at first connected with resistance moving contact 142, to divide, switching-on resistance 35 places in circuit, resistance contact point 32 is connected about 10 milliseconds of back with resistance moving contact 142, arcing contact 33 is connected with arc extinguishing moving contact 143, main circuit is connected, and the electric current in the main circuit is by arcing contact 33 and 143 conductings of arc extinguishing moving contact; Be only main contacts 31 and initiatively contact 141 connections at last.Because switching-on resistance 35 inserted before main circuit was connected, and circuit is charged in advance, the steepness that line voltage waveform changes when making the main circuit conducting slows down, thereby avoids producing closing overvoltage.During combined floodgate; if close a floodgate on the electric network fault circuit; can produce bigger combined floodgate electric arc; but because arcing contact 33 is connected earlier; therefore most electric arc all is created on the arcing contact 33; main contacts 31 can not produce electric arc almost connecting with active contact 141 under the idiostatic situation, and protection main contacts 31 is not burnt out.
Claims (6)
1, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker comprises shell (1), is installed in the insulating cylinder (7) in the shell (1) and is arranged on fixed contact and moving contact in the insulating cylinder (7), it is characterized in that:
Fixed contact comprises the insulation guide plate (34) that is fixedly installed in the insulating cylinder (7) and is inserted into main contacts (31) in insulation guide plate (34), resistance contact point (32) and arcing contact (33), main contacts (31), resistance contact point (32) are connected with insulation guide plate (34) elasticity by spring respectively with arcing contact (33), main contacts (31) is electrically connected by flexible conductor with arcing contact (33), and the end of main contacts (31) is electrically connected with connecting plate (37); Elastic movement gap between main contacts (31) and the insulation guide plate (34) is less than the elastic movement gap between arcing contact (33) and the insulation guide plate (34); Elastic movement gap between resistance contact point (32) and the insulation guide plate (34) is greater than the elastic movement gap between arcing contact (33) and the insulation guide plate (34); The end of resistance contact point (32) is electrically connected with connecting plate (37) by branch, switching-on resistance (35);
Moving contact comprises interior insulation support plate (72), the external insulation supporting bracket (73) that is fixedly installed in the insulating cylinder (7) and is inserted into arc extinguishing moving contact (143) in the two-layer insulation support plate, be installed with conductive plate (1421) on the arc extinguishing moving contact (143), conductive plate (1421) is positioned between insulation support plate (72) and the external insulation supporting bracket (73); Initiatively contact (141) and resistance moving contact (142) are fixed together by this conductive plate (1421) and arc extinguishing moving contact (143), active contact (141), resistance moving contact (142), arc extinguishing moving contact (143) is inserted on the interior insulation support plate (72), its position respectively with main contacts (31), resistance contact point (32), arcing contact (33) is corresponding, interior insulation support plate (72) is gone up and resistance moving contact (142), the corresponding position of arc extinguishing moving contact (143) is provided with cylinder sleeve (144), resistance moving contact (142), the stage casing of arc extinguishing moving contact (143) has piston, and form piston with the inwall of cylinder sleeve (144) and cooperate, the end of arc extinguishing moving contact (143) has connecting plate (1422).
2, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker according to claim 1, it is characterized in that: described insulating cylinder (7) comprises urceolus and is sleeved on inner core in the urceolus, inner core is a segmental structure, and insulation guide plate (34), interior insulation support plate (72) and external insulation supporting bracket (73) are installed in the junction of each segmentation of inner core.
3, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker according to claim 1, it is characterized in that: under gate-dividing state, distance between main contacts (31) and the active contact (141) is maximum, distance between arcing contact (33) and the arc extinguishing moving contact (143) secondly, the distance minimum between resistance contact point (32) and the resistance moving contact (142).
4, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker according to claim 1 is characterized in that: arcing contact (33) be positioned at the insulation guide plate (34) the center, a plurality of main contactss (31) and resistance contact point (32) be looped around arcing contact (33) around.
5, according to claim 1 or 2 or 3 or 4 described multi-stage arc suppressing breaking device for extra-high voltage circuit breaker, it is characterized in that: a side of arc extinguishing moving contact (143) and resistance moving contact (142) is provided with arc blow-out pipe (145), the top of arc blow-out pipe (145) is respectively towards the top of arc extinguishing moving contact (143) and resistance moving contact (142), and the piston on arc extinguishing moving contact (143) or the resistance moving contact (142) is run through in its lower end; Have the exhaust outlet (41) that unidirectional valve is installed on the piston.
6, multi-stage arc suppressing breaking device for extra-high voltage circuit breaker according to claim 4, it is characterized in that: arcing contact (33) be positioned at the insulation guide plate (34) the center, other have three main contactss (31) and three resistance contact points (32) be looped around arcing contact (33) around; The branch, the switching-on resistance (35) that are divided into three groups are electrically connected with three resistance contact points (32) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100779393A CN100442411C (en) | 2006-04-26 | 2006-04-26 | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100779393A CN100442411C (en) | 2006-04-26 | 2006-04-26 | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862741A true CN1862741A (en) | 2006-11-15 |
| CN100442411C CN100442411C (en) | 2008-12-10 |
Family
ID=37390132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100779393A Expired - Fee Related CN100442411C (en) | 2006-04-26 | 2006-04-26 | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100442411C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020303A1 (en) * | 2009-08-20 | 2011-02-24 | 中国电力科学研究院 | Switch off breaker, switch on-off breaker, switch on-off system, and switch off method for ultra-high voltage alternating current transmission line |
| CN112600075A (en) * | 2020-10-12 | 2021-04-02 | 广西序能电气设备有限公司 | Piston arc control device of vertical placing |
| CN114068227A (en) * | 2020-08-07 | 2022-02-18 | 平高集团有限公司 | Isolating switch and static end part thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4459447A (en) * | 1982-01-27 | 1984-07-10 | Mitsubishi Denki Kabushiki Kaisha | Self extinguishing type gas circuit breaker |
| JPH01213927A (en) * | 1988-02-23 | 1989-08-28 | Mitsubishi Electric Corp | Insulator type gas shutoff device |
| JPH0864088A (en) * | 1994-08-17 | 1996-03-08 | Toshiba Corp | Buffer type gas-blast circuit-breaker |
| JPH08195147A (en) * | 1995-01-20 | 1996-07-30 | Hitachi Ltd | Puffer type gas-blast circuit breaker |
| JP3298360B2 (en) * | 1995-05-15 | 2002-07-02 | 富士電機株式会社 | Puffer type gas circuit breaker |
| JPH0950747A (en) * | 1995-08-08 | 1997-02-18 | Meidensha Corp | Buffer type gas-blast circuit-breaker |
| CN2488165Y (en) * | 2001-07-11 | 2002-04-24 | 株洲庆云电力机车配件工厂 | Vacuum circuit breaker |
| ES2342047T3 (en) * | 2002-02-22 | 2010-07-01 | Mitsubishi Electric Corporation | OUTDOOR SWITCH. |
| CN1747094A (en) * | 2005-08-26 | 2006-03-15 | 王光顺 | Double-speed segmented contact of ultrahigh voltage |
| CN2906887Y (en) * | 2006-04-26 | 2007-05-30 | 王光顺 | Multi-stage arc extinguishing breaking device for extra high voltage breaker |
-
2006
- 2006-04-26 CN CNB2006100779393A patent/CN100442411C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020303A1 (en) * | 2009-08-20 | 2011-02-24 | 中国电力科学研究院 | Switch off breaker, switch on-off breaker, switch on-off system, and switch off method for ultra-high voltage alternating current transmission line |
| CN114068227A (en) * | 2020-08-07 | 2022-02-18 | 平高集团有限公司 | Isolating switch and static end part thereof |
| CN112600075A (en) * | 2020-10-12 | 2021-04-02 | 广西序能电气设备有限公司 | Piston arc control device of vertical placing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100442411C (en) | 2008-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104576175B (en) | High-voltage double-break circuit breaker | |
| CN100530480C (en) | High-voltage vacuum circuit breaker with mono-fracture voltage to 252kV | |
| CN100454462C (en) | Very high breaker in use for GIS | |
| CN100350534C (en) | Four pole multi speed disjunction contact of extra-high-voltage breaker | |
| CN104576176A (en) | Circuit breaker of arc extinguish chambers in series connection | |
| CN102568910A (en) | 1100kV extra-high voltage series complement bypass switch | |
| CN110071010B (en) | Solid-sealed polar pole with gas buffering device | |
| WO2016058549A1 (en) | Ultra-high-speed mechanical switch, switch fracture thereof and switch contacts thereof | |
| CN2906887Y (en) | Multi-stage arc extinguishing breaking device for extra high voltage breaker | |
| CN110896012A (en) | Double-break vacuum circuit breaker | |
| CN204303660U (en) | A kind of single arc-chutes double-fracture breaker | |
| CN1747094A (en) | Double-speed segmented contact of ultrahigh voltage | |
| CN102760607A (en) | Pressure-operated load switch for gas-insulated ring main unit | |
| CN100442411C (en) | Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker | |
| CN200953325Y (en) | Bidirectional energy-storing high-speed breaking contact used for ultrahigh voltage circuit breaker | |
| CN110896005A (en) | Vacuum circuit breaker signal feedback mechanism | |
| CN202454479U (en) | 1100kV extra-high-voltage series-compensation by-pass switch | |
| CN100414655C (en) | Bidirectional energy-storage high-speed disjunction contact for extra-high voltage breaker | |
| CN200986885Y (en) | Extra-high voltage circuit breaker for GIS | |
| CN101393814A (en) | 72.5kV indoor type high-voltage SF6 circuit breaker | |
| CN200944371Y (en) | Double-lift vacuum extinction chamber | |
| CN2817041Y (en) | Multiple-speed disjunction contact for super-high-voltage switch | |
| CN2829070Y (en) | Four-pole multiplier-speed breaking contact superhigh-voltage circuit breaker | |
| CN100454461C (en) | Double-fracture combination column type superhigh voltage multiplier breaking circuit breaker | |
| CN200953309Y (en) | Constant-voltage explusion breaking contact used for ultrahigh-voltage breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20110426 |