CN103646813A - Transmission mechanism of isolation circuit breaker and method - Google Patents
Transmission mechanism of isolation circuit breaker and method Download PDFInfo
- Publication number
- CN103646813A CN103646813A CN201310646400.5A CN201310646400A CN103646813A CN 103646813 A CN103646813 A CN 103646813A CN 201310646400 A CN201310646400 A CN 201310646400A CN 103646813 A CN103646813 A CN 103646813A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- connecting lever
- lever
- isolation
- circuit breakers
- 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
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a transmission mechanism of an isolation circuit breaker and a method. The transmission mechanism includes a pull rod which drives a second contact terminal to move and a first connecting-rod drive mechanism and a second connecting-rod drive mechanism, which drive the pull rod to move, wherein the first connecting-rod drive mechanism is driven by a motor and the second connecting-rod drive mechanism is driven by an operating mechanism. The first connecting-rod drive mechanism at least includes a first connecting lever which is fixed with the motor in a rotating manner and the second connecting-rod drive mechanism at least includes a second connecting lever fixed with the operating mechanism in a rotating manner. A clamping tool and a mechanical latching device used for fixing corresponding connecting levers are installed on the first connecting lever and the second connecting lever respectively. In the transmission mechanism of the isolation circuit breaker, the pull rod is connected with the second contact terminal and the movement of the pull rod is controlled through the first connecting-rod drive mechanism and a second connecting-rod drive mechanism so that normal current passage, switch-off, switch-on and isolation of the circuit breaker is realized through control of the upward and downward movements of the pull rod by the first connecting-rod drive mechanism and the second connecting-rod drive mechanism.
Description
[technical field]
The present invention relates to high-voltage switch gear field, particularly a kind of isolation circuit breakers transmission mechanism and method.
[background technology]
According to the definition of the standards such as IEC62271-108 and GB/T27747-2011, after isolation circuit breakers dynamic/static contact separates completely, fracture between dynamic/static contact will meet the requirement of isolation switch insulation level, after this means that isolation circuit breakers dynamic/static contact completely separately, distance between dynamic/static contact is larger than traditional circuit breaker, this not only makes inside and outside insulation coordination, break performance all change to some extent, and has proposed new requirement to transmission.
[summary of the invention]
The invention provides a kind of isolation circuit breakers transmission mechanism and method, to realize normally through-flow, separating brake and the closing function of isolation circuit breakers, can also realize the isolation features of isolation circuit breakers.
For reaching above object, the present invention takes following technical scheme to be achieved:
A kind of for isolation circuit breakers transmission mechanism, comprise and drive second to touch cephalomotor pull bar, and the first connecting rod driving mechanism and the second connecting rod driving mechanism that drive pull bar motion, wherein, described first connecting rod driving mechanism is driven by motor, second connecting rod driving mechanism is driven by operating mechanism, described first connecting rod driving mechanism at least includes first connecting lever fixing with motor rotation, described second connecting rod mechanism at least includes second connecting lever fixing with operating mechanism rotation, on described the first connecting lever and the second connecting lever, be separately installed with fixture and mechanical locking device for fixing corresponding connecting lever, by fixture, fix the first connecting lever or fix the second connecting lever by mechanical locking device, thereby realize circuit breaker and opening a sluice gate position, closing position, between isolated location, move.
As the preferred embodiments of the present invention, described pull bar is connected with second connecting rod driving mechanism with first connecting rod driving mechanism respectively by first connecting rod, and described pull bar and first connecting rod form the first revolute.
As the preferred embodiments of the present invention, described first connecting rod driving mechanism further includes second connecting rod, and described first connecting rod and second connecting rod form the second revolute, and described second connecting rod and the first connecting lever form the 3rd revolute.
As the preferred embodiments of the present invention, described second connecting rod driving mechanism further includes third connecting rod, and described first connecting rod and third connecting rod form the 4th revolute, and described third connecting rod and the second connecting lever form the 5th revolute.
As the preferred embodiments of the present invention, between described pull bar and first connecting rod, formed acute angle is less than 15 ° all the time.
As the preferred embodiments of the present invention, described first connecting rod and third connecting rod acutangulate and are less than all the time 35 °.
A kind of method of utilizing the transmission mechanism control isolation circuit breakers of above-mentioned isolation circuit breakers, when isolation circuit breakers, carry out and to cut-off or during feed motion, clamp clamps the first connecting lever maintains static the first connecting lever, by operating mechanism, drives the second contact to move between combined floodgate and open position; When circuit breaker is carried out isolation action, operating mechanism, by mechanical locking device locking, fixes the second connecting lever, and now, release clip, drives the second contact to move to isolated location from open position by motor, realizes the isolation features of circuit breaker.
During breaker open operation, when clamp clamps the first connecting lever, the second connecting rod hinged with the first connecting lever rotates and translation do not occur around pin joint, operating mechanism drives the second connecting lever to be rotated counterclockwise, and then drive pull bar to move down, until the second contact moves to just minute position from closing position, the second connecting lever continues to be rotated counterclockwise, and drives the second contact to move to open position from a firm minute position.
When isolation circuit breakers is carried out isolation action, first by circuit breaker separating brake from normal through-flow state, then carry out isolation action, when carrying out isolation action, the second connecting lever maintains static, and with the hinged third connecting rod rotation of the second connecting lever, translation does not occur, now, release clip, the first connecting lever turns clockwise, and pull bar is moved down, then drive the second contact to move to isolated location from open position, finally, utilize clamp the first connecting lever to make it fixing, circuit breaker is in blocking.
Compared with prior art, the present invention at least has following beneficial effect: the present invention is connected with pull bar on the second contact, pull bar move through first connecting rod driving mechanism and second connecting rod driving mechanisms control, by first connecting rod driving mechanism and second connecting rod driving mechanisms control pull bar, move up and down, realize normally through-flow, separating brake, combined floodgate and the isolation of circuit breaker.
[accompanying drawing explanation]
Fig. 1 is the structural representation that isolation circuit breakers the second contact is positioned at "on" position.
Fig. 2 is the angle structural representation between pull bar and first connecting rod and first connecting rod and third connecting rod in Fig. 1.
Fig. 3 is that isolation circuit breakers the second contact is positioned at the just structural representation of minute position.
Fig. 4 is the structural representation that isolation circuit breakers the second contact is positioned at open position.
Fig. 5 is the structural representation of isolation circuit breakers the second contact while being positioned at isolated location and locking.
In figure: 1 is arc control device, 2 is the first contact, 3 is closing position, 4 is firm minute position, 5 is open position, 6 is isolated location, 7 is the second contact, 8 is gathering sill, 9 is pull bar, 10 is the first revolute, 11 is first connecting rod, 12 is the second revolute, 13 is second connecting rod, 14 is motor, 15 is the first connecting lever, 16 is the 3rd revolute, 17 is the 4th revolute, 18 is third connecting rod, 19 is the 5th revolute, 20 is the second connecting lever, 21 is operating mechanism, 22 is first point of rotation, 23 is second point of rotation, 24 is fixture, 25 is the first angle, 26 is the second angle, 27 is mechanical locking device.
[embodiment]
Below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail.
Refer to shown in Fig. 1, Fig. 3 to Fig. 5, the invention provides a kind of transmission mechanism of isolation circuit breakers, comprise pull bar 9, first connecting rod 11, second connecting rod 13, third connecting rod 18, the first connecting lever 15, the second connecting lever 20, motor 14, fixture 24, operating mechanism 21, mechanical locking device 27.Wherein first connecting rod 11 forms the first revolute 10 with pull bar 9, first connecting rod 11 forms the second revolute 12 with second connecting rod 13, second connecting rod 13 and the first connecting lever 15 form the 3rd revolute 16, first connecting rod 11 forms the 4th revolute 17 with third connecting rod 18, and third connecting rod 18 and the second connecting lever 20 form the 5th revolute 19; Motor 14 and the first connecting lever 15 are fastenedly connected, and the first connecting lever 15 is rotated around first point of rotation 22; Operating mechanism 21 and the second connecting lever 20 are fastenedly connected, and the second connecting lever 20 is rotated around second point of rotation 23.
In isolation circuit breakers, be provided with the first contact 2 and the second contact 7, the first contacts 2 and the second contact 7 integral body as in arc extinguishing air chamber 1, described arc extinguishing air chamber 1 is provided with the gathering sill 8 that supplies pull bar 9 to slide and guiding is provided in bottom.The first contact 2 maintains static, the second contact 7 is under pull bar 9 effects, along gathering sill 8, move up and down, realize normally through-flow, separating brake, combined floodgate and the isolation of circuit breaker, wherein normally when through-flow (or combined floodgate) the second contact 7 in closing position 3, when separating brake completes, the second contact 7 is in open position 5, and during isolation, the second contact 7 is in isolated location 6.
When isolation circuit breakers, carry out and to cut-off or during closing function, motor 14 is not charged, fixture 24 is clamped the first connecting lever 15 and the first connecting lever 15 is maintained static, and by operating mechanism 21, drives the second contact 7 to move between closing position 3 and open position 5, realizes cut-offfing or closing a floodgate of circuit breaker; When isolation circuit breakers need to be carried out isolation features (for example, while needing to overhaul), operating mechanism 21 is first by mechanical locking device 27 mechanical latchings, the second connecting lever 20 is fixing, now untie fixture 24, by motor 14, drive the second contact 7 to move to isolated location 6 from open position 5, realize the isolation features of circuit breaker.3 describe in detail below:
Circuit breaker is normal when through-flow, and motor 14 is not charged, and fixture 24 clamps the first connecting levers 15 and also makes it fixing, operating mechanism 21 inoperation, and the second contact 7 is static in closing position 3, as shown in Figure 1.
During breaker open operation (the second contact 7 need to move to open position 5 from closing position 3), motor 14 is not charged, fixture 24 clamps the first connecting lever 15 and makes it fixing, around the 3rd revolute 16 rotations, there is not translation in second connecting rod 13, operating mechanism 21 drives the second connecting lever 20 to be rotated counterclockwise around second point of rotation 23, and under third connecting rod 18, first connecting rod 11, second connecting rod 13 actings in conjunction, pull bar 9 is moved down along gathering sill 8, then drive the second contact 7 to move to firm minute position 4(as shown in Figure 3 from closing position 3); The second connecting lever 20 continues to be rotated counterclockwise around second point of rotation 23, drives the second contact 7 to move to open position 5(as shown in Figure 4 from firm minute position 4).
During breaker closing (the second contact 7 need to move to closing position 3 from open position 5), motor 14 is not charged, fixture 24 clamps the first connecting lever 15 and makes it fixing, there is not translation around the 3rd revolute 16 rotations in second connecting rod 13 now, operating mechanism 21 drives the second connecting lever 20 to turn clockwise around second point of rotation 23, at third connecting rod 18, first connecting rod 11, under second connecting rod 13 actings in conjunction, pull bar 9 is moved up along gathering sill 8, first the second contact 7 is moved to just minute position 4 from open position 5, the second connecting lever 20 continues to turn clockwise around second point of rotation 23, the second contact 7 moves to closing position 3 from firm minute position 4 the most at last.The state that combined floodgate completes be exactly normal through-flow state, as shown in Figure 1.
When isolation circuit breakers need to be carried out isolation features (for example, while needing to overhaul), first by circuit breaker separating brake from normal through-flow state, the second contact 7 moves to open position 5 from closing position 3, then adopt mechanical locking device 27 by operating mechanism 21 lockings, even if there is like this misoperation, operating mechanism 21 can not be triggered yet, and such the second connecting lever 20 will maintain static, and now third connecting rod 18 will translation not occur around the 5th revolute 19 rotations; Now untie fixture 24, motor 14 is charged and drive the first connecting lever 15 to turn clockwise around first point of rotation 22, and under second connecting rod 13, first connecting rod 11, third connecting rod 18 actings in conjunction, make pull bar 9 continue to move down along gathering sill 8, then drive the second contact 7 to move to isolated location 6 from open position 5; Finally, fixture 24 clamps the first connecting lever 15 and makes it fixing, and circuit breaker, in blocking, even if now there is misoperation, can not change the position of the second contact 7.
While closing a floodgate to normal through-flow state, first isolation circuit breakers is operated to gate-dividing state from isolation after circuit breaker executes isolation features, is about to the second contact 7 and 6 moves to open position 5 from isolated location.Now operating mechanism 21 can not be operated by mechanical locking device 27 lockings, and the second connecting lever 20 will maintain static, and third connecting rod 18 will translation not occur around the 5th revolute 19 rotations; Untie fixture 24, motor 14 is charged and drive the first connecting lever 15 to be rotated counterclockwise, and under second connecting rod 13 first connecting rods 11, third connecting rod 18 actings in conjunction, pull bar 9 is moved up along gathering sill 8, then drive the second contact 76 to move to open position 5 from isolated location; Then, isolation circuit breakers is operated to "on" position from gate-dividing state, is about to the second contact 7 and moves to closing position 3 from open position 5.Motor 14 is not charged, and fixture 24 clamps the first connecting lever 15 and makes it fixing, and now second connecting rod 13 will translation not occur around the 3rd revolute 16 rotations; Mechanical locking device 27 is removed, operating mechanism 21 drives the second connecting lever 20 to turn clockwise around second point of rotation 23, under third connecting rod 18, first connecting rod 11, second connecting rod 13 actings in conjunction, pull bar 9 is moved up along gathering sill 8, first the second contact 7 is moved to just minute position 4 from open position 5, the second connecting lever 20 continues to turn clockwise around second point of rotation 23, and the second contact 7 moves to closing position 3 from firm minute position 4 the most at last.
When isolation circuit breakers need to be removed isolation features (for example, after maintenance), now operating mechanism 21 is still in blocking, and the second connecting lever 20 is fixing, and third connecting rod 18 will translation not occur around the 5th revolute 19 rotations; Untie fixture 24, motor 14 is charged and drive the first connecting lever 15 to be rotated counterclockwise, and under second connecting rod 13, first connecting rod 11, third connecting rod 18 actings in conjunction, pull bar 9 is moved up along gathering sill 8, then drive the second contact 76 to move to open position 5 from isolated location.
In separating brake, combined floodgate and isolation processes, pull bar 9 and first connecting rod 11 acutangulate 25 and be less than all the time 15 °, first connecting rod 11 and third connecting rod 18 acutangulate 26 and be less than all the time 35 ° (consulting shown in Fig. 2).
Described motor 14 can rotating, only has after fixture 24 unclamps, and motor 14 could hot line jobs, only have after mechanical locking device 27 is removed, and operating mechanism 21 could operate; Motor 14 can not operate with operating mechanism 21 simultaneously.
Transmission mechanism of the present invention, not only can realize circuit breaker through-flow, separating brake and closing function normally, and can realize isolation features, compact overall structure.In divide-shut brake and isolation processes, pull bar and first connecting rod acutangulate and are less than all the time 15 °, and first connecting rod and third connecting rod acutangulate and be less than all the time 35 °, guarantee that transmission process is steady.In addition, circuit breaker is (the second contact is in isolated location) when isolation, can to circuit breaker, carry out locking by transmission mechanism, even if misoperation also can not change the isolation of circuit breaker, has further improved fail safe.
Claims (9)
1. an isolation circuit breakers transmission mechanism, it is characterized in that, comprise the pull bar (9) that drives the second contact (7) motion, and the first connecting rod driving mechanism and the second connecting rod driving mechanism that drive pull bar (9) motion, wherein, described first connecting rod driving mechanism is driven by motor (14), second connecting rod driving mechanism is driven by operating mechanism (21), described first connecting rod driving mechanism at least includes first connecting lever (15) fixing with motor (14) rotation, described second connecting rod mechanism at least includes second connecting lever (20) fixing with operating mechanism rotation, on described the first connecting lever (15) and the second connecting lever (20), be separately installed with fixture (24) and mechanical locking device (27) for fixing corresponding connecting lever, by fixture, fix the first connecting lever or fix the second connecting lever by mechanical locking device, thereby realize circuit breaker and opening a sluice gate position, closing position, between isolated location, move.
2. a kind of isolation circuit breakers transmission mechanism according to claim 1, it is characterized in that, described pull bar (9) is connected with second connecting rod driving mechanism with first connecting rod driving mechanism respectively by first connecting rod (11), and described pull bar (9) and first connecting rod (11) form the first revolute (10).
3. a kind of isolation circuit breakers transmission mechanism according to claim 2, it is characterized in that, described first connecting rod driving mechanism further includes second connecting rod (13), described first connecting rod (11) and second connecting rod (13) form the second revolute (12), and described second connecting rod and the first connecting lever (15) form the 3rd revolute (16).
4. a kind of isolation circuit breakers transmission mechanism according to claim 3, it is characterized in that, described second connecting rod driving mechanism further includes third connecting rod (18), described first connecting rod (11) and third connecting rod (18) form the 4th revolute (17), and described third connecting rod and the second connecting lever (20) form the 5th revolute (19).
5. according to a kind of isolation circuit breakers transmission mechanism described in any one in claim 2 to 4, it is characterized in that, between described pull bar (9) and first connecting rod (11), formed acute angle is less than 15 ° all the time.
6. according to a kind of isolation circuit breakers transmission mechanism described in claim 3 or 4, it is characterized in that, described first connecting rod (11) acutangulates and is less than all the time 35 ° with third connecting rod (18).
7. a method of utilizing the transmission mechanism control isolation circuit breakers of the isolation circuit breakers described in claim 1, it is characterized in that: when isolation circuit breakers, carry out and to cut-off or during feed motion, fixture (24) is clamped the first connecting lever (15) and is made it to maintain static, and by operating mechanism (21), drives the second contact to move between combined floodgate and open position; When circuit breaker is carried out isolation action, operating mechanism (21), by mechanical locking device (27) locking, makes the second connecting lever (20) fixing, now, release clip, drives the second contact to move to isolated location from open position by motor (14), realizes the isolation features of circuit breaker.
8. method as claimed in claim 7, it is characterized in that: during breaker open operation, when fixture (24) is clamped the first connecting lever (15), the second connecting rod (13) hinged with the first connecting lever (15) rotates and translation do not occur around pin joint, operating mechanism (21) drives the second connecting lever (20) to be rotated counterclockwise, and then drive pull bar to move down, until the second contact moves to just minute position from closing position, the second connecting lever (20) continues to be rotated counterclockwise, and drives the second contact to move to open position from a firm minute position.
9. method as claimed in claim 7, it is characterized in that: when isolation circuit breakers is carried out isolation action, first by circuit breaker separating brake from normal through-flow state, then carry out isolation action, when carrying out isolation action, the second connecting lever maintains static, the third connecting rod hinged with the second connecting lever (18) rotates and translation do not occur, now, and release clip, the first connecting lever turns clockwise, pull bar is moved down, then drive the second contact to move to isolated location from open position, last, utilize clamp the first connecting lever to make it fixing, circuit breaker is in blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646400.5A CN103646813B (en) | 2013-12-02 | 2013-12-02 | A kind of isolation circuit breakers transmission mechanism and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646400.5A CN103646813B (en) | 2013-12-02 | 2013-12-02 | A kind of isolation circuit breakers transmission mechanism and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103646813A true CN103646813A (en) | 2014-03-19 |
| CN103646813B CN103646813B (en) | 2016-03-02 |
Family
ID=50252012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310646400.5A Active CN103646813B (en) | 2013-12-02 | 2013-12-02 | A kind of isolation circuit breakers transmission mechanism and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103646813B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
| CN108007683A (en) * | 2017-12-27 | 2018-05-08 | 福建中能电气有限公司 | Vacuum circuit breaker detecting tool |
| CN108022790A (en) * | 2018-01-08 | 2018-05-11 | 许涛 | A kind of disconnecting switch |
| CN108269712A (en) * | 2018-01-08 | 2018-07-10 | 许继集团有限公司 | A kind of on-pole switch and its built-in isolating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556769Y (en) * | 2002-07-11 | 2003-06-18 | 长沙电器开关有限公司 | Driving device of electric operating mechanism for isolator |
| KR20080103887A (en) * | 2007-05-25 | 2008-11-28 | 미쓰비시덴키 가부시키가이샤 | A mechanism for regulating a contact pressure of a circuit breaker |
| CN201725699U (en) * | 2010-06-07 | 2011-01-26 | 福建东方电器有限公司 | Novel circuit breaker transmission linkage mechanism |
| CN202796701U (en) * | 2012-09-26 | 2013-03-13 | 中电装备恩翼帕瓦（山东）高压开关有限公司 | Connecting rod transmission device of gas insulated switchgear (GIS) disconnecting switch breaking-closing action |
-
2013
- 2013-12-02 CN CN201310646400.5A patent/CN103646813B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556769Y (en) * | 2002-07-11 | 2003-06-18 | 长沙电器开关有限公司 | Driving device of electric operating mechanism for isolator |
| KR20080103887A (en) * | 2007-05-25 | 2008-11-28 | 미쓰비시덴키 가부시키가이샤 | A mechanism for regulating a contact pressure of a circuit breaker |
| CN201725699U (en) * | 2010-06-07 | 2011-01-26 | 福建东方电器有限公司 | Novel circuit breaker transmission linkage mechanism |
| CN202796701U (en) * | 2012-09-26 | 2013-03-13 | 中电装备恩翼帕瓦（山东）高压开关有限公司 | Connecting rod transmission device of gas insulated switchgear (GIS) disconnecting switch breaking-closing action |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076455A1 (en) * | 2016-10-31 | 2018-05-03 | 国家电网公司 | Servo-drive isolation circuit breaker |
| CN108007683A (en) * | 2017-12-27 | 2018-05-08 | 福建中能电气有限公司 | Vacuum circuit breaker detecting tool |
| CN108022790A (en) * | 2018-01-08 | 2018-05-11 | 许涛 | A kind of disconnecting switch |
| CN108269712A (en) * | 2018-01-08 | 2018-07-10 | 许继集团有限公司 | A kind of on-pole switch and its built-in isolating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103646813B (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107068470B (en) | A kind of double-fracture disconnecting switch with ground connection linkage | |
| CN103646813B (en) | A kind of isolation circuit breakers transmission mechanism and method | |
| CN106356241B (en) | A kind of high stability high-pressure vacuum breaker | |
| US9543081B2 (en) | Electrical apparatus with dual movement of contacts comprising a return device with two levers | |
| CN106504915A (en) | A kind of isolated chopper | |
| CN105206468A (en) | Circuit breaker capable of conveniently adjusting opening range and contacting travel | |
| CN109873305A (en) | A kind of electromagnetism push type automatic switching pressing plate | |
| CN106298360B (en) | Permanent magnetic actuator vacuum separating brake closing device | |
| US20140116859A1 (en) | 3-way switch for a gas-insulated apparatus | |
| CN204424188U (en) | A kind of opening/closing operation mechanism of circuit breaker | |
| CN208521855U (en) | Circuit breaker for inflating cabinet | |
| CN106531545B (en) | A kind of high-pressure vacuum breaker | |
| CN109686598B (en) | A kind of automatic change-over electric appliance with duplicate | |
| CN207338183U (en) | Vacuum circuit breaker constructions | |
| WO2016078625A1 (en) | High voltage switch moving contact mechanism, and high voltage switch using same | |
| CN203312203U (en) | Spring operating mechanism having cam free from brake opening spring pressure | |
| CN106783424B (en) | A kind of remote control of circuit breaker | |
| CN103414109B (en) | A kind of many electric power incoming lines switch cubicle | |
| KR101542100B1 (en) | Disconnector Switchgear | |
| CN210272170U (en) | Auxiliary arc extinguishing device for 800kV external grounding switch | |
| CN203277141U (en) | Door open to power-off blocking device of composite mining flame-proof switch | |
| CN201282085Y (en) | Device for preventing operation mechanism from repeat U-shaped brake | |
| CN106099731B (en) | A kind of handcart type breaker | |
| CN201698954U (en) | Vacuum insulation breaker device | |
| CN107633963B (en) | A kind of delay control mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 |