CN108807063A - A kind of switchgear and its three-phase ground switch - Google Patents
A kind of switchgear and its three-phase ground switch Download PDFInfo
- Publication number
- CN108807063A CN108807063A CN201810557385.XA CN201810557385A CN108807063A CN 108807063 A CN108807063 A CN 108807063A CN 201810557385 A CN201810557385 A CN 201810557385A CN 108807063 A CN108807063 A CN 108807063A
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- Prior art keywords
- main shaft
- contact
- moving contact
- transmission main
- linking arm
- 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.)
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- 230000005540 biological transmission Effects 0.000 claims abstract description 50
- 230000003068 static effect Effects 0.000 claims abstract description 31
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 4
- 206010014357 Electric shock Diseases 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of switchgears and its three-phase ground to switch, and is related to high voltage electric equipment technical field.Switchgear includes cabinet, three-phase ground switch and three-phase static contact are installed in cabinet, three-phase ground switch includes the pedestal being fixedly mounted with cabinet, transmission main shaft is rotatably equipped on pedestal, linking arm is vertically connected on transmission main shaft, the outer end of linking arm is equipped with the integral type moving contact that length extends along the axis of transmission main shaft, which is detached from three-phase static contact simultaneously when being transmitted main shaft and driving rotation and contacts to realize divide-shut brake.When use, operating mechanism drives transmission main shaft rotation, transmission main shaft drives moving contact to carry out splitting or integrating lock action, because the moving contact is an integral structure, moving contact is detached from three-phase static contact and contact condition has the synchronism of height, it ensure that each phase contact divide-shut brake simultaneously, improve the reliability of grounding connection, completely eliminate the electric shock hidden danger of operating personnel.
Description
Technical field
The present invention relates to high voltage electric equipment technical fields, and in particular to a kind of switchgear and its three-phase ground switch.
Background technology
In high-tension circuit, switchgear is control important in entire circuit, shunting part.When normal work, power distribution cabinet
It is exactly charging equipment, when needing inspection switch cabinet, needs to be grounded to avoid service personnel's generation Danger Electric shock risk, control is opened
It is earthing switch to close the element whether cabinet is grounded.The effect of earthing switch is：One, mains side in switchgear or output are set
Load side prevents from sending a telegram here suddenly in maintenance process, and the load of output can be imported underground and protect service personnel by earthing switch,
Two, residual charge is drained, avoids causing electric discharge dangerous because of accumulation.
The prior art of earthing switch is as disclosed in the Chinese utility model patent of Authorization Notice No. CN202772494U
Technical solution, a kind of rotary earthing switch of gas insulation switch cabinet include holder and main shaft, axis in holder
Set, connecting lever, ground connection blade, short circuit copper bar, ground contact seat, aluminium set.Main shaft is splined shaft, and several high intensity are sheathed with by spline
The connecting lever of metal material, each two connecting lever are set as one group, are grounded blade and short circuit copper bar both ends and are installed by screw and nut
Between every group of two connecting levers, main shaft is installed on holder by the axle sleeve at both ends and can be rotated on holder, and main shaft one end is stretched
Go out to be used for attended operation mechanism, ground contact seat is installed on main circuit conductor, quickly rotates by operating mechanism action drives main shaft
Ground connection blade is set to be inserted into the ground connection that ground contact seat completes main circuit conductor.
But above-mentioned earthing switch in the prior art, complicated, parts are more, and assembling process is cumbersome.Moreover,
In actual processing it cannot be guaranteed that fixed hole position to neutrality, using the fixed three ground connection blade of screw positions there may be
Deviation, partial earthing blade is in complete closing position when causing to use, other ground connection blades do not form with ground contact seat good
Good contact, the motion synchronicity of each section grounding wafer is poor, and it is unreliable to there is ground connection, cannot completely eliminate the electric shock of operating personnel
Hidden danger.
Invention content
It is poor with the motion synchronicity for solving movable contact spring the purpose of the present invention is to provide a kind of three-phase ground switch, ground connection
It is unreliable, the problem of electric shock hidden danger of operating personnel cannot be completely eliminated.The purpose of the present invention is to provide a kind of switchgear, with
The motion synchronicity for solving movable contact spring is poor, and ground connection is unreliable, the problem of cannot completely eliminating the electric shock hidden danger of operating personnel.
To achieve the above object, the technical solution of three-phase ground of the invention switch is：
Three-phase ground switchs, including pedestal, is rotatably equipped with transmission main shaft on pedestal, connection is vertically connected on transmission main shaft
Arm, the outer end of linking arm are equipped with length and extend along the axis of transmission main shaft and rotated for simultaneously under transmission main shaft drive
It is detached from and contacts with three-phase static contact to realize the integral type moving contact of divide-shut brake.
Advantageous effect：In use, operating mechanism is sequentially connected with transmission main shaft, and when needing to be grounded or disconnect ground connection, actuating
Mechanism drives transmission main shaft rotation, transmission main shaft that moving contact is driven to carry out splitting or integrating lock action, because the moving contact is integral type knot
Structure, moving contact is detached from three-phase static contact and contact condition has the synchronism of height, ensure that each phase contact divide-shut brake simultaneously,
The reliability for improving grounding connection completely eliminates the electric shock hidden danger of operating personnel.
In order to simplify structure, assembly difficulty is reduced, moving contact is further limited, the moving contact is long strip-board shape knot
The plate face of structure, moving contact is vertical with the length extending direction of linking arm.
In order to ensure not interfered between linking arm and static contact, the installation position of linking arm is further limited, institute
It states there are two linking arms and is spaced setting on the axis direction of transmission main shaft, moving contact is divided into three difference by two linking arms
Contact site corresponding with three-phase static contact.
In order to improve the reliability of movable contact spring conduction, increase corresponding structure, the company between linking arm and moving contact
The outer end for connecing arm is fixedly installed gasket, and the plane where gasket is vertical with the length extending direction of linking arm, passes through gasket
It is fastened with moving contact.
To achieve the above object, the technical solution of switchgear of the invention is：
Switchgear includes cabinet, three-phase ground switch is equipped in cabinet, three-phase ground switch includes being fixedly mounted with cabinet
Pedestal is rotatably equipped with transmission main shaft on pedestal, linking arm is vertically connected on transmission main shaft, the outer end of linking arm is equipped with length
Spend along transmission main shaft axis extend integral type moving contact, the moving contact be transmitted main shaft drive rotation when simultaneously and cabinet
Interior three-phase static contact is detached from and contacts to realize divide-shut brake.
Advantageous effect：In use, operating mechanism is sequentially connected with transmission main shaft, and when needing to be grounded or disconnect ground connection, actuating
Mechanism drives transmission main shaft rotation, transmission main shaft that moving contact is driven to carry out splitting or integrating lock action, because the moving contact is integral type knot
Structure, moving contact is detached from three-phase static contact and contact condition has the synchronism of height, ensure that each phase contact divide-shut brake simultaneously,
The reliability for improving grounding connection completely eliminates the electric shock hidden danger of operating personnel.
In order to simplify structure, assembly difficulty is reduced, moving contact is further limited, the moving contact is long strip-board shape knot
The plate face of structure, moving contact is vertical with the length extending direction of linking arm.
In order to ensure not interfered between linking arm and static contact, the installation position of linking arm is further limited, institute
It states there are two linking arms and is spaced setting on the axis direction of transmission main shaft, moving contact is divided into three difference by two linking arms
Contact site corresponding with three-phase static contact.
In order to improve the reliability of movable contact spring conduction, increase corresponding structure, the company between linking arm and moving contact
The outer end for connecing arm is fixedly installed gasket, and the plane where gasket is vertical with the length extending direction of linking arm, passes through gasket
It is fastened with moving contact.
In order to realize that three-phase ground switch can realize quiet earth, the structure of three-phase static contact is further limited, institute
State the ground connection clip that contact site clamping engagement corresponding with moving contact is provided on three-phase static contact.
Description of the drawings
Fig. 1 is the schematic front view of three-phase ground switch moving contact part when closing a floodgate of the present invention；
The right side that Fig. 2 is Fig. 1 regards schematic diagram；
Fig. 3 is that the three-phase ground of the present invention switchs the schematic top plan view of the moving contact part in separating brake；
Fig. 4 is the left view schematic diagram of Fig. 3；
Fig. 5 is that the right side when three-phase ground switch of the present invention closes a floodgate in the application regards schematic diagram；
In figure：1- pedestals, 2- transmission main shafts, 3- linking arms, 4- moving contacts, 5- gaskets, 6- bolts, 7- ground connection clip, 8- transmissions
Bar, 10- cabinets.
Specific implementation mode
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment 1 of the switchgear of the present invention, switchgear include three-phase ground switch, as shown in Figures 1 to 4, also
Including arranged side by side and equidistant three-phase static contact is arranged on 10 internal face of cabinet, operating mechanism is by driving transmission main shaft 2 real
The divide-shut brake action of existing three-phase ground switch, as described in Figure 5, wherein drive link 8 moves downward, and transmission crank arm is driven to carry out the inverse time
Needle rotates and transmission main shaft 2 is driven to rotate synchronously, and realizes the feed motion of moving contact 4, conversely, realizing separating brake.
Three-phase ground switch includes pedestal 1 and transmission main shaft 2, the fixed master there are two on axis direction on pedestal 1
Shaft stool, spindle bearing top have perforation, are set with copper sheathing in perforation, prevent spindle abrasion, prolong the service life, copper sheathing
The form fit of inner wall shape and transmission main shaft 2 installs wherein, using split pin by 2 company of being fixed of copper sheathing and transmission main shaft
It connects, axial limiting is carried out to the two, ensure that synchronous rotation.
Be fixed with two parallel linking arms 3 between two spindle bearings on transmission main shaft 2, two linking arms 3 with biography
The axis extending direction of dynamic main shaft 2 is vertical, and the outer end of linking arm 3 is equipped with length and is touched along the dynamic of axis extension of transmission main shaft 2
First 4, which is integral type long strip-board shape structure, ensure that each phase contact divide-shut brake simultaneously, and improve grounding connection can
By property, the electric shock hidden danger of operating personnel is completely eliminated.Corresponding gasket 5 is fixedly installed in the outer end of linking arm 3, passes through spiral shell
6 nut of bolt makes the upper surface of gasket 5 and the lower face of moving contact 4 be fastened to realize the installation of moving contact 4, improve movable contact spring
Conductive reliability.Two linking arms 3 on transmission main shaft 2 are arranged with three-phase static contact interval, and two linking arms 3 are by moving contact
4 are isolated into three contact sites corresponding with three-phase static contact respectively, are interfered when avoiding combined floodgate.It is arranged on three-phase static contact
The ground connection clip 7 for having contact site clamping engagement corresponding with moving contact 4, when transmission main shaft 2 rotates, moving contact 4 synchronizes
Circular motion, and moving contact 4 moves that path is tangent always, and tangentially it is caught in the correspondence grounding clamp of three-phase static contact
In folder 7, quiet earth can be realized by realizing switchgear by 10 conduction of cabinet.
Spindle bearing is stretched out at the both ends of transmission main shaft 2, and one is fixed with axle sleeve on end, is fixed with and turns on axle sleeve
Arm and hanging spring shaft, axle sleeve and hanging spring shaft are separately positioned on the both ends position of connecting lever, axis extending direction and the transmission of hanging spring shaft
The axis of main shaft 2 is parallel, and circumferential annular groove is offered on hanging spring shaft and is hung over thereon for spring one end.It is corresponding on pedestal 1 to hang spring
The position of axis, which is additionally provided with, hangs spring bearing, is fixed with reinforcing rib between the side and the upper face of pedestal 1 of extension spring bearing, hangs spring bearing
Top offer threaded hole, between threaded hole and the threaded rod for hanging circlip tapping coordinate, on the one hand play fixed circlip of hanging
On the other hand effect can also adjust it into row distance, to change the stroke of spring.
The both ends of spring are buckled respectively to be hung over hanging spring shaft and hangs on circlip, when moving contact 4 deviates closing position and only dead point
When, hanging spring shaft and hang that the distance between circlip is elongated, and spring elongation strain simultaneously generates corresponding elastic acting force, drive connecting lever and
Transmission main shaft 2 resets, and then moving contact 4 is driven to restore to closing position.It avoids due to accidentally touching or closing a floodgate not in real work
In place the problem of caused earthing failure, the hidden danger of worker's electric shock is eliminated, ensure that the safety of operating personnel.When moving contact 4
When in complete closing position, it is fixed with limited block close to 2 position of transmission main shaft on pedestal 1, stretching is fixed on limited block
Screw, the outer end face of screw support cooperation with the extension of linking arm 3, the limit of moving contact 4 are realized, when preventing feed motion
Moving contact 4 hits static contact, protects the durability of entire three-phase ground switch.
Above-mentioned specific embodiment 1 is the preferred embodiment of the switchgear of the present invention, can be according to need in other embodiment
Corresponding structure is adjusted, simplified or advanced optimized, can specifically there are following several adjustment versions：
The specific embodiment 2 of the switchgear of the present invention, switchgear includes cabinet, and three-phase ground switch and three-phase are equipped in cabinet
Static contact, three-phase ground switch includes the pedestal being fixedly mounted with cabinet, and transmission main shaft, transmission main shaft are rotatably equipped on pedestal
On be vertically connected with linking arm, the outer end of linking arm is equipped with the integral type moving contact that length extends along the axis of transmission main shaft,
The moving contact is detached from three-phase static contact simultaneously when being transmitted main shaft and driving rotation and contacts to realize divide-shut brake.This implementation
Moving contact in example can also use other forms other than using the form in above-mentioned specific embodiment 1, such as：It is dynamic to touch
Head is bow font plate, and lower end therein is fixed with linking arm, and end is clamped as between contact site and three-phase static contact thereon
Connection, which is realized, closes a floodgate.
The specific embodiment 3 of the switchgear of the present invention, as advanced optimizing to specific embodiment 2, in order to simplify knot
Structure reduces assembly difficulty, and the moving contact is long strip-board shape structure, and the plate face of moving contact and the length extending direction of linking arm hang down
Directly, in other embodiment, moving contact can also the structures such as cylinder.
The specific embodiment 4 of the switchgear of the present invention, as advanced optimizing to specific embodiment 2, in order to ensure to connect
It connecing and is not interfered between arm and static contact, there are two the linking arms and setting is spaced on the axis direction of transmission main shaft,
Moving contact is divided into three contact sites corresponding with three-phase static contact respectively by two linking arms, in other embodiment, two connections
Two outsides that three-phase static contact is corresponded on transmission main shaft can be arranged in arm.
The specific embodiment 5 of the switchgear of the present invention, advanced optimizes as to 2 to 4 any one of specific embodiment,
In order to improve the reliability of movable contact spring conduction, the outer end of the linking arm is fixedly installed gasket, the plane where gasket with
The length extending direction of linking arm is vertical, is fastened by gasket and moving contact, in other embodiment, linking arm can with it is dynamic
Weld together between contact, or linking arm is bent at a right angle, is fastened by bending part and moving contact.
The specific embodiment 6 of the switchgear of the present invention, as advanced optimizing to specific embodiment 4, in order to realize three
Phase earthing switch can realize quiet earth, and contact site clamping engagement corresponding with moving contact is provided on the three-phase static contact
Ground connection clip, in other embodiment, ground connection clip can also be substituted for connector contact, when combined floodgate with moving contact single-contact.
The specific embodiment of the three-phase ground switch of the present invention, with three-phase in the specific implementation mode of the switchgear of the present invention
Each specific embodiment of earthing switch is identical, and details are not described herein.
Claims (9)
1. a kind of three-phase ground switchs, including pedestal, it is rotatably equipped with transmission main shaft on pedestal, characterized in that on transmission main shaft
It is vertically connected with linking arm, the outer end of linking arm is equipped with length and extends along the axis of transmission main shaft and driven in transmission main shaft
Lower rotation realizes the integral type moving contact of divide-shut brake for being detached from and contacting with three-phase static contact simultaneously.
2. three-phase ground switch according to claim 1, characterized in that the moving contact is long strip-board shape structure, moves and touches
The plate face of head is vertical with the length extending direction of linking arm.
3. three-phase ground according to claim 1 switch, characterized in that the linking arm there are two and in transmission main shaft
Setting is spaced on axis direction, moving contact is divided into three contact sites corresponding with three-phase static contact respectively by two linking arms.
4. the three-phase ground switch according to claims 1 to 3 any one, characterized in that the outer end of the linking arm is equal
It is fixedly installed gasket, the plane where gasket is vertical with the length extending direction of linking arm, is bonded with moving contact by gasket
Fastening.
5. a kind of switchgear, including cabinet, three-phase ground switch is installed, three-phase ground switch includes being fixed with cabinet in cabinet
The pedestal of installation is rotatably equipped with transmission main shaft on pedestal, characterized in that is vertically connected with linking arm on transmission main shaft, connects
The outer end of arm is equipped with the integral type moving contact that length extends along the axis of transmission main shaft, which is being transmitted main shaft drive
It is detached from the three-phase static contact in cabinet simultaneously when rotation and contacts to realize divide-shut brake.
6. switchgear according to claim 5, characterized in that the moving contact is long strip-board shape structure, the plate of moving contact
Face is vertical with the length extending direction of linking arm.
7. switchgear according to claim 5, characterized in that the linking arm there are two and in the axis side of transmission main shaft
Moving contact is divided into three contact sites corresponding with three-phase static contact respectively by interval setting, two linking arms upwards.
8. according to the switchgear described in claim 5 to 7 any one, characterized in that the fixation of the outer end of the linking arm is set
It is equipped with gasket, the plane where gasket is vertical with the length extending direction of linking arm, is fastened by gasket and moving contact.
9. switchgear according to claim 7, characterized in that be provided on the three-phase static contact corresponding with moving contact
The ground connection clip of contact site clamping engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557385.XA CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557385.XA CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108807063A true CN108807063A (en) | 2018-11-13 |
| CN108807063B CN108807063B (en) | 2023-11-28 |
Family
ID=64090190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810557385.XA Active CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108807063B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006309997A (en) * | 2005-04-27 | 2006-11-09 | Mitsubishi Electric Corp | Switching apparatus |
| JP2008091271A (en) * | 2006-10-04 | 2008-04-17 | Toshiba Corp | Three-phase package type grounding switch |
| CN201112231Y (en) * | 2007-10-22 | 2008-09-10 | 厦门协成实业有限公司 | Three-station isolation ground switch |
| CN102176396A (en) * | 2011-03-17 | 2011-09-07 | 上海思源高压开关有限公司 | Three-phase common-box type high-speed earthing switch device |
| CN203056444U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating ground switch used for solid insulation switch cabinet |
| CN104715957A (en) * | 2013-12-13 | 2015-06-17 | 昆山瑞普电气有限公司 | Improved structure of isolation phase-changing switch |
| WO2017190490A1 (en) * | 2016-05-05 | 2017-11-09 | 国家电网公司 | High-voltage switch and circuit breaker unit thereof |
-
2018
- 2018-06-01 CN CN201810557385.XA patent/CN108807063B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006309997A (en) * | 2005-04-27 | 2006-11-09 | Mitsubishi Electric Corp | Switching apparatus |
| JP2008091271A (en) * | 2006-10-04 | 2008-04-17 | Toshiba Corp | Three-phase package type grounding switch |
| CN201112231Y (en) * | 2007-10-22 | 2008-09-10 | 厦门协成实业有限公司 | Three-station isolation ground switch |
| CN102176396A (en) * | 2011-03-17 | 2011-09-07 | 上海思源高压开关有限公司 | Three-phase common-box type high-speed earthing switch device |
| CN203056444U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating ground switch used for solid insulation switch cabinet |
| CN104715957A (en) * | 2013-12-13 | 2015-06-17 | 昆山瑞普电气有限公司 | Improved structure of isolation phase-changing switch |
| WO2017190490A1 (en) * | 2016-05-05 | 2017-11-09 | 国家电网公司 | High-voltage switch and circuit breaker unit thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108807063B (en) | 2023-11-28 |
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