CN209418418U - A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated - Google Patents
A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated Download PDFInfo
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- CN209418418U CN209418418U CN201920212324.XU CN201920212324U CN209418418U CN 209418418 U CN209418418 U CN 209418418U CN 201920212324 U CN201920212324 U CN 201920212324U CN 209418418 U CN209418418 U CN 209418418U
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- 230000008033 biological extinction Effects 0.000 title claims abstract description 14
- 238000002955 isolation Methods 0.000 claims abstract description 84
- 230000003068 static effect Effects 0.000 claims abstract description 33
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- 230000033001 locomotion Effects 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The built-in vacuum extinction chamber device being isolated of one kind of the utility model, including vacuum interrupter, it is characterised in that: further include barrier assembly, linkage unit and rod assembly;The vacuum interrupter and barrier assembly series connection, rod assembly attended operation mechanism;The rod assembly movement, drives the vacuum interrupter and the barrier assembly to act respectively by the linkage unit;And when separating brake, the vacuum interrupter first carries out separating brake movement, carries out separating brake movement after the barrier assembly;When combined floodgate, the barrier assembly first carries out feed motion, carries out feed motion after the vacuum interrupter;The vacuum interrupter includes arc-chutes static contact and arc-chutes moving contact, and the barrier assembly includes isolation knife plate and isolation static contact, and the linkage unit includes bracket, connecting lever, arc-chutes driving plate, isolation drive plate, the first trundle and the second trundle.With compact-sized, easy to operate, safe and reliable advantage.
Description
Technical field
The utility model relates to transmission & distribution electro-technical fields, and in particular to vacuum circuit breaker.
Background technique
In order to improve the reliability of supplying power allocation, strengthen the safety management of power distribution network, State Grid Corporation of China starts for 2016
Carry forward vigorously one or two convergence projects of controller switching equipment.Wherein vacuum circuit breaker is capital equipment in primary circuit.But due to
Vacuum interrupter disjunction fracture distance generally only has 8 to 10 millimeters, and fracture distance is smaller, in gate-dividing state, works as supply lines
Road generates very high overvoltage or when the impact such as thunder and lightning, and vacuum fracture is likely to breakdown, makes to switch other side band again
Electricity causes the accident.On basic routing line, the insecure phenomenon of this isolation is become apparent, and is threatened bigger.Therefore, national grid
To the necessary mating isolation switch of the vacuum circuit breaker of line sectionalizing and contact point, and matched isolation switch should meet electrically to fall
Hot standby requirement in lock operation.However, the vacuum circuit breaker of mainstream is the isolation knife of external mostly currently on the market.
This external isolation knife needs are individually operated, also need to increase the interlock with breaker, meanwhile, external isolation knife is by extraneous ring
Border is affected, and contact knife is oxidizable so as to cause hidden danger such as contact resistance increase, fevers.
Therefore, how existing vacuum circuit breaker is improved, especially the improvement of vacuum interrupter part, is made
It overcomes disadvantages mentioned above, is those skilled in the art's problem urgently to be resolved.
Utility model content
One of the utility model is designed to provide a kind of compact-sized, easy to operate, safe and reliable built-in isolation
Vacuum extinction chamber device.
Another of the utility model is designed to provide a kind of the true of the vacuum extinction chamber device with the built-in isolation
Empty breaker.
To achieve the above objectives, the technical solution adopted in the utility model are as follows:
A kind of built-in vacuum extinction chamber device being isolated, including vacuum interrupter, it is characterised in that: further include isolation group
Part, linkage unit and rod assembly;The vacuum interrupter and barrier assembly series connection, the rod assembly attended operation machine
Structure;
The rod assembly movement drives the vacuum interrupter and the barrier assembly to distinguish by the linkage unit
Movement;And when separating brake, the vacuum interrupter first carries out separating brake movement, carries out separating brake movement after the barrier assembly;When combined floodgate,
The barrier assembly first carries out feed motion, carries out feed motion after the vacuum interrupter;
The vacuum interrupter includes arc-chutes static contact and arc-chutes moving contact, and the barrier assembly includes isolation knife
Plate is isolated static contact and is flexible coupling, and the linkage unit includes bracket, connecting lever, arc-chutes driving plate, isolation drive plate, first
Trundle and the second trundle;
The bracket is fixedly installed, and offers limiting slot on the bracket;First trundle is fixedly installed on described
On arc-chutes moving contact, and first trundle can be slided along the limiting slot, and first trundle is in the limiting slot
When interior sliding, the arc-chutes moving contact can be contacted or be separated with the arc-chutes static contact;The arc-chutes driving plate rotation
It is arranged on the bracket, and first trundle passes through the arc-chutes driving plate, opens up in the arc-chutes driving plate
There is guide groove;The connecting lever middle section is rotatably dispose on the bracket, and the connecting lever upper end is rotatablely connected under the rod assembly
End, the connecting lever lower end is fixedly installed second trundle, and second trundle can be slided along the guide groove;Institute
It states isolation drive plate to be rotatably dispose on the bracket, open slot, and second transmission is offered on the isolation drive plate
Pin can be slided along the open slot;The isolation knife plate is fixedly installed on the isolation drive plate, and the isolation knife plate and
The arc-chutes moving contact passes through the electric connection that is flexible coupling, the isolation static contact fixed setting, the isolation knife
When plate follows the isolation drive plate to rotate, the isolation knife front edge of board can be contacted or be separated with the isolation static contact;
Rod assembly driving connecting lever rotation, the connecting lever drive second trundle in the guide groove and described
Sliding in open slot, the arc-chutes driving plate drive first trundle to slide in the limiting slot, and the isolation is driven
Movable plate drives the isolation knife plate rotation, realizes the successive divide-shut brake of the vacuum interrupter and the barrier assembly.
Preferably, the limiting slot is in lateral linear structure, the guide groove is in tulwar type structure, the guide groove packet
It includes delay number and pushes section, the open slot includes straightway and arc section;Second trundle is slided in the delay number
When, second trundle does not drive the arc-chutes driving plate to rotate, and second trundle is driven by the straightway
The isolation drive plate rotation, when the second trundle slides into arc section sliding, the isolation drive plate is motionless;Described
When two trundles slide into the promotion section, second trundle drives the arc-chutes driving plate rotation, the arc-chutes
Driving plate drives first trundle to slide in the limiting slot.Above-mentioned limiting slot, guide groove and open slot are set as
A kind of structure that successive divide-shut brake function may be implemented.
Further preferably setting, the delay number and the promotion Duan Jun are arc-shaped, may be implemented successively to move work
Energy.
As an improvement, being fixedly installed insulating boot outside the vacuum extinction chamber device.The setting of insulating boot is so that this dress
It is more preferable to set insulating properties.
A kind of vacuum circuit breaker, the vacuum extinction chamber device including above-mentioned built-in isolation.
Compared with the prior art, the advantages of the utility model are:
1, by the combination settings of vacuum interrupter and barrier assembly, one side vacuum interrupter is able to achieve to the big of circuit
Capacity is cut-off, and another aspect barrier assembly is able to achieve the security isolation to alive circuit.
2, by integrating barrier assembly and vacuum interrupter, so that this programme is compact-sized, without interlocking dress
It sets, so that product structure is simple and reliable.
3, barrier assembly is mounted on circuit breaker internal by this programme, can better protective separation component, avoid its by
External environment influence and be damaged.
4, more importantly: when this programme separating brake, vacuum interrupter is first disconnected, after arriving vacuum interrupter separating brake in place, every
Just start to separate with isolation static contact from knife plate, until the complete separating brake of barrier assembly;When combined floodgate, barrier assembly first closes a floodgate, when every
After contacting from knife plate with isolation static contact, vacuum interrupter just starts to close a floodgate.Above-mentioned working method can guarantee that barrier assembly will not
Switching on and off is charged, ensure that the security reliability of vacuum circuit breaker.
5, it's also worth mentioning that the isolation knife plate in breaker mostly uses red copper to be fabricated, although red copper is with good
Good electric conductivity, but its intensity is lower, easily deforms, wears.And the isolation knife plate in this programme is mainly as conduction
Part, linkage unit are isolated that the power from rod assembly being subject on knife plate is limited, and most power is joined mainly as structural member
Dynamic component is born, therefore the structure of this programme is relatively securely, reliably, has longer service life.
Detailed description of the invention
Fig. 1 is the schematic perspective view (not showing insulating boot) of a preferred embodiment according to the present utility model;
Fig. 2 is that the schematic perspective view of a preferred embodiment according to the present utility model (does not show insulating boot and branch
Frame);
Fig. 3 is the top view of a preferred embodiment according to the present utility model;
Fig. 4 to fig. 6 is the half sectional view of a preferred embodiment according to the present utility model;Wherein Fig. 4 shows combined floodgate
State, Fig. 6 show that gate-dividing state, Fig. 5 show combined floodgate-separating brake or separating brake-combined floodgate intermediate state;
Fig. 7 is the structural schematic diagram of bracket in a preferred embodiment according to the present utility model;
Fig. 8 is the structural schematic diagram of arc-chutes driving plate in a preferred embodiment according to the present utility model;
Fig. 9 is the structural schematic diagram that driving plate is isolated in a preferred embodiment according to the present utility model.
Specific embodiment
It is described below for disclosing the utility model so that those skilled in the art can be realized the utility model.It retouches below
Preferred embodiment in stating is only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " transverse direction ",
" longitudinal direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, narration the utility model is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, constructed and operated with particular orientation, should not be understood as the specific protection model for limiting the utility model
It encloses.
As shown in figure 1-9, be a preferred embodiment of the utility model, including vacuum interrupter 1, barrier assembly 2,
Linkage unit 3, rod assembly 4 and insulating boot 5.Vacuum interrupter 1 and barrier assembly 2 are connected, 4 attended operation machine of rod assembly
Structure, insulating boot 5 are fixedly installed on outside;In addition insulating boot 5 is fixedly installed in the gas tank of breaker (since gas tank is existing normal
Rule setting, therefore the gas tank of breaker is not shown in the present embodiment).
Wherein, vacuum interrupter 1 includes arc-chutes static contact 11 and arc-chutes moving contact 12, and barrier assembly 2 includes isolation
Knife plate 21, isolation static contact 22 and it is flexible coupling 23, linkage unit 3 includes bracket 31, connecting lever 32, arc-chutes driving plate 33, isolation
Driving plate 34, the first trundle 35 and the second trundle 36.
Its specific structure and connection relationship are as follows: bracket 31 is fixedly installed, and offers limiting slot 311 on bracket 31;First
Trundle 35 is fixedly installed on arc-chutes moving contact 12, and the first trundle 35 can be slided along limiting slot 311, the first trundle
35 in limiting slot 311 when sliding, and arc-chutes moving contact 11 can be contacted or be separated with arc-chutes static contact 12;Arc-chutes driving plate
33 are rotatably dispose on bracket 31, and the first trundle 35 passes through arc-chutes driving plate 33, offers in arc-chutes driving plate 33
Guide groove 331;32 middle section of connecting lever is rotatably dispose on bracket 31, and 32 upper end of connecting lever is rotatablely connected 4 lower end of rod assembly, connecting lever 32
Lower end is fixedly installed the second trundle 36, and the second trundle 36 can be slided along guide groove 331;The rotation of isolation drive plate 34 is set
It is placed on bracket 31, open slot 341 is offered on isolation drive plate 34, and the second trundle 36 can be slided along open slot 341;Every
It is fixedly installed on isolation drive plate 34 from knife plate 21, and knife plate 21 and arc-chutes moving contact 12 is isolated by being flexible coupling 23 electrically
Connection, isolation static contact 22 are fixedly installed, and when isolation knife plate 21 follows isolation drive plate 34 to rotate, isolation 21 front end of knife plate can be with
The contact of static contact 22 or separation is isolated.
As an implementation, limiting slot 311 is in lateral linear structure, and guide groove 331 is in tulwar type structure, guide groove
331 include delay number 3311 and promotion section 3312, and open slot 341 includes straightway 3411 and arc section 3412;Second trundle
36 when delay number 3311 slides, and the second trundle 36 does not drive arc-chutes driving plate 33 to rotate, and the second trundle 36 is by opening
The straightway 3411 of mouth slot 341 drives isolation drive plate 34 to rotate;Second trundle 36 slides into the arc section of open slot 341
When 3412, isolation drive plate 34 is motionless, and when the second trundle 36 slides into promotion section 3312, the second trundle 36 drives arc-chutes
Driving plate 33 rotates, and arc-chutes driving plate 33 drives the first trundle 35 to slide in limiting slot 331.Wherein, delay number 3311
It is arc-shaped with promotion section 3312.
The key work of the present embodiment is, rod assembly 4 acts, by linkage unit 3 drive vacuum interrupter 1 and every
It is acted respectively from component 2;And when separating brake, vacuum interrupter 1 first carries out separating brake movement, carries out separating brake movement after barrier assembly 2;It closes
When lock, barrier assembly 2 first carries out feed motion, carries out feed motion after vacuum interrupter 1.(it should be noted that rod assembly
4 include connecting lever and pull rod, and connecting lever hexagon ring is fixedly connected on the output shaft of operating mechanism, and connecting lever small end is rotatablely connected pull rod,
Operating mechanism drives connecting lever to drive;When connecting lever rotates counterclockwise, rod assembly 4 is pushed ahead, and carries out separating brake movement;Work as connecting lever
When rotating clockwise, rod assembly 4 pulls backward, carries out feed motion.It is hereafter no longer right since rod assembly is existing structure
4 working method of rod assembly is specifically described.)
Specifically, successively showing the separating brake process of the present embodiment as shown in Figures 4 to 6:
As shown in figure 4, being in "on" position, arc-chutes static contact 11 and arc-chutes moving contact 12 are in contact shape at this time
State, isolation knife plate 21 and isolation static contact 22 are in contact condition, and the first trundle 35 is in the left end of limiting slot 311, and second
Trundle 36 is in the upper end for pushing section 3312.When carrying out separating brake, rod assembly 4 is pushed ahead, and connecting lever 32 rotates clockwise, the
Two trundles 36 driving arc-chutes driving plate 33 rotate counterclockwise, and by arc-chutes driving plate 33 drive the first trundle 35 to
Right sliding, 36 slide downward of the second trundle, until reaching state shown in Fig. 5.Second trundle 36 movement at this time is driven in isolation
The arc section 3412 of notch 341 on movable plate 34, therefore isolation drive plate 34 and isolation knife plate 21 are stationary.
As shown in figure 5, being at combined floodgate-separating brake intermediate state, at this time arc-chutes static contact 11 and arc-chutes moving contact 12
In discrete state (i.e. vacuum interrupter 1 is in gate-dividing state), knife plate 21 and isolation static contact 22 is isolated still in contact condition,
First trundle 35 is in the right end of limiting slot 311, and the second trundle 36 is in the bottom of delay number 3311.Continue operation to draw
Bar assembly 4 is pushed ahead, and arc-chutes driving plate 33 is stationary at this time, and the movement of isolation drive plate 34 is until reaching shown in Fig. 6
State.
As shown in fig. 6, being in gate-dividing state, arc-chutes static contact 11 and arc-chutes moving contact 12 are in separation shape at this time
State, isolation knife plate 21 and isolation static contact 22 are in discrete state, and the distance between knife plate 21 and isolation static contact 22 is isolated
Greater than minimum safe distance, for the first trundle 35 still in the right end of limiting slot 311, the second trundle 36 enters delay number
3311, and reach the top of delay number 3311.
Conversely, successively showing the making process of the present embodiment as shown in Fig. 6 to Fig. 4:
As shown in fig. 6, being in gate-dividing state, arc-chutes static contact 11 and arc-chutes moving contact 12 are in separation shape at this time
State, isolation knife plate 21 and isolation static contact 22 are in discrete state, and the distance between knife plate 21 and isolation static contact 22 is isolated
Greater than minimum safe distance, for the first trundle 35 still in the right end of limiting slot 311, the second trundle 36 is in delay number 3311
The top.When being closed a floodgate, rod assembly 4 pulls backward, and connecting lever 32 rotates counterclockwise, 36 slide downward of the second trundle,
Second trundle 36 driving isolation drive plate 34 rotates clockwise, and is turned clockwise by the driving isolation knife plate of isolation drive plate 34
Dynamic, the first trundle 35 first remains stationary, until reaching state shown in Fig. 5.
As shown in figure 5, being separating brake-combined floodgate intermediate state, arc-chutes static contact 11 and arc-chutes moving contact 12 be still at this time
In discrete state, knife plate 21 and isolation static contact 22 is isolated still in contact condition (i.e. barrier assembly 2 is in "on" position),
For first trundle 35 still in the right end of limiting slot 311, the second trundle 36 is in the bottom of delay number 3311.Continue to operate
Rod assembly 4 pulls backward, until reaching state shown in Fig. 4.Second trundle 36 movement at this time is on isolation drive plate 34
The arc section 3412 of notch 341, therefore isolation drive plate 34 and isolation knife plate 21 are stationary.
As shown in figure 4, being in "on" position, arc-chutes static contact 11 and arc-chutes moving contact 12 are in contact shape at this time
State, isolation knife plate 21 and isolation static contact 22 are in contact condition, and the first trundle 35 is in the left end of limiting slot 311, and second
Trundle 36 is in the top for pushing section 3312.
It should be noted that the present embodiment is mainly used on vacuum circuit breaker, but it is also not excluded for applied to it
His breaker, on-load switch, on combined electrical apparatus.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (5)
1. a kind of built-in vacuum extinction chamber device being isolated, including vacuum interrupter, it is characterised in that: further include barrier assembly,
Linkage unit and rod assembly;The vacuum interrupter and barrier assembly series connection, rod assembly attended operation mechanism;
The rod assembly movement, drives the vacuum interrupter and the barrier assembly to move respectively by the linkage unit
Make;And when separating brake, the vacuum interrupter first carries out separating brake movement, carries out separating brake movement after the barrier assembly;When combined floodgate, institute
It states barrier assembly and first carries out feed motion, carry out feed motion after the vacuum interrupter;
The vacuum interrupter includes arc-chutes static contact and arc-chutes moving contact, the barrier assembly include isolation knife plate, every
From static contact and it is flexible coupling, the linkage unit includes bracket, connecting lever, arc-chutes driving plate, isolation drive plate, the first trundle
With the second trundle;
The bracket is fixedly installed, and offers limiting slot on the bracket;First trundle is fixedly installed on the arc extinguishing
On the moving contact of room, and first trundle can be slided along the limiting slot, and first trundle is sliding in the limiting slot
When dynamic, the arc-chutes moving contact can be contacted or be separated with the arc-chutes static contact;The arc-chutes driving plate rotation setting
In on the bracket, and first trundle passes through the arc-chutes driving plate, offers and leads in the arc-chutes driving plate
To slot;The connecting lever middle section is rotatably dispose on the bracket, and the connecting lever upper end is rotatablely connected the rod assembly lower end, institute
It states connecting lever lower end and is fixedly installed second trundle, and second trundle can be slided along the guide groove;It is described every
It is rotatably dispose on the bracket from driving plate, open slot is offered on the isolation drive plate, and second trundle can
It is slided along the open slot;The isolation knife plate is fixedly installed on the isolation drive plate, and the isolation knife plate and described
Arc-chutes moving contact follows institute by the electric connection that is flexible coupling, the isolation static contact fixed setting, the isolation knife plate
When stating the rotation of isolation drive plate, the isolation knife front edge of board can be contacted or be separated with the isolation static contact;
The rod assembly driving connecting lever rotation, the connecting lever drive second trundle in the guide groove and the opening
Sliding in slot, the arc-chutes driving plate drive first trundle to slide in the limiting slot, the isolation drive plate
It drives the isolation knife plate to rotate, realizes the successive divide-shut brake of the vacuum interrupter and the barrier assembly.
2. a kind of built-in vacuum extinction chamber device being isolated according to claim 1, it is characterised in that: the limiting slot is in
Lateral linear structure, the guide groove are in tulwar type structure, and the guide groove includes delay number and promotion section, the open slot packet
Include straightway and arc section;For second trundle when the delay number slides, second trundle does not drive described go out
The rotation of arc chamber driving plate, second trundle drive the isolation drive plate to rotate by the straightway, the second trundle
When sliding into the arc section, the isolation drive plate is motionless;When second trundle slides into the promotion section, described
Two trundles drive the arc-chutes driving plate rotation, and the arc-chutes driving plate drives first trundle in the limit
Sliding in slot.
3. a kind of built-in vacuum extinction chamber device being isolated according to claim 2, it is characterised in that: the delay number and
The promotion Duan Jun is arc-shaped.
4. a kind of built-in vacuum extinction chamber device being isolated according to claim 3, it is characterised in that: the vacuum extinction
Insulating boot is fixedly installed outside chamber device.
5. a kind of vacuum circuit breaker, it is characterised in that: including the built-in isolation as described in Claims 1-4 any claim
Vacuum extinction chamber device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201920212324.XU CN209418418U (en) | 2019-02-19 | 2019-02-19 | A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201920212324.XU CN209418418U (en) | 2019-02-19 | 2019-02-19 | A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated |
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Publication Number | Publication Date |
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CN209418418U true CN209418418U (en) | 2019-09-20 |
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CN201920212324.XU Withdrawn - After Issue CN209418418U (en) | 2019-02-19 | 2019-02-19 | A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109659190A (en) * | 2019-02-19 | 2019-04-19 | 宁波天安智能电网科技股份有限公司 | A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated |
-
2019
- 2019-02-19 CN CN201920212324.XU patent/CN209418418U/en not_active Withdrawn - After Issue
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109659190A (en) * | 2019-02-19 | 2019-04-19 | 宁波天安智能电网科技股份有限公司 | A kind of built-in vacuum extinction chamber device and vacuum circuit breaker being isolated |
CN109659190B (en) * | 2019-02-19 | 2024-04-19 | 宁波天安智能电网科技股份有限公司 | Built-in isolated vacuum arc-extinguishing chamber device and vacuum circuit breaker |
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