CN106783365A - A kind of Threephase common-box high-voltage switch gear - Google Patents
A kind of Threephase common-box high-voltage switch gear Download PDFInfo
- Publication number
- CN106783365A CN106783365A CN201611199040.9A CN201611199040A CN106783365A CN 106783365 A CN106783365 A CN 106783365A CN 201611199040 A CN201611199040 A CN 201611199040A CN 106783365 A CN106783365 A CN 106783365A
- Authority
- CN
- China
- Prior art keywords
- switch
- main switch
- shaft assembly
- shaft
- general assembly
- 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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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a kind of Threephase common-box high-voltage switch gear, including the general assembly of isolation knife rest, main switch shaft assembly and earthed switch shaft assembly, wherein：The main switch shaft assembly includes moving contact pull rod shaft, contact spring, main switch fairlead and main switch fairlead support, for making solid-sealing vacuum arc-chutes close a floodgate or separating brake；The isolation knife rest general assembly, for realizing that disconnecting switch is closed a floodgate or disconnecting switch separating brake；The earthed switch shaft assembly includes earthed switch connecting lever, slide rail, ground connection feeler lever general assembly and guide finger, is closed a floodgate or ground connection separating brake for being grounded.After by each switch spindle be cascaded the part for isolating knife rest general assembly, three-phase main switch and earthed switch component are included by the present invention, it is placed in switch-box body, then by controlling the connecting shaft of outside the enclosure, the Synchronous Transmission to threephase switch and control are realized, while the also appropriate phase spacing for increasing threephase switch.
Description
Technical field
The present invention relates to high-voltage switch gear technical field, more particularly to a kind of Threephase common-box high-voltage switch gear.
Background technology
At present, the insulating cylinder of three-phase independence is used to combine completion with a metal cabinet in solid insulation ring main unit
The transmission of earthed switch, disconnecting switch and main switch and operation.
Present inventor realize it is of the invention during find, ensure safe handling in the case of, existing skill
There is the defect that phase spacing is compacter and assembling is more complicated in the threephase switch in art.
Therefore, how to be improved for existing threephase switch, ensure overall tightness in the case of, make ground connection,
Isolation, main switch transmission are synchronized with operation, and suitably increase phase spacing, are technical problems urgently to be resolved hurrily at present.
The content of the invention
A kind of Threephase common-box high-voltage switch gear is the embodiment of the invention provides, is used to solve threephase switch of the prior art
There is a problem of that phase spacing is compacter and it is more complicated to assemble, the present invention will isolate knife rest general assembly and three-phase main switch and ground connection
After the part that switch module is included is cascaded by each switch spindle, will be placed in switch-box body, then pass through
The connecting shaft of outside the enclosure is controlled, Synchronous Transmission and control and appropriate increase threephase switch phase spacing to threephase switch is reached
From purpose.
In order to reach above-mentioned technical purpose, the invention provides a kind of Threephase common-box high-voltage switch gear, including isolation knife rest
General assembly (3), main switch shaft assembly (20) and earthed switch shaft assembly (21), wherein：
The main switch shaft assembly (20) including moving contact pull rod shaft (2), contact spring (16), main switch fairlead (15) with
And main switch fairlead support (14), for making solid-sealing vacuum arc-chutes (17) close a floodgate or separating brake；
Isolation knife rest general assembly (3), for realizing that disconnecting switch is closed a floodgate or disconnecting switch separating brake；
The earthed switch shaft assembly (21) including earthed switch connecting lever (13), slide rail (12), ground connection feeler lever general assembly (6) with
And guide finger, closed a floodgate or ground connection separating brake for being grounded.
In some embodiments, present invention additionally comprises outlet casing tube (10), specifically：
By the outlet casing tube (10) through shrouding (9), using fixture by the shrouding (9) and the switch casing
(4) it is fixed together, one end of the outlet casing tube (10) is isolated knife rest general assembly (3) with described as the contact of disconnecting switch
Contact connection, and the outlet casing tube (10) is fixed together by inserts with grounding static contact (7).
In some embodiments, the solid-sealing vacuum arc-chutes (17) are fixed on the switch casing by the present invention
(4) relative to the position of the main switch shaft assembly (20).
In some embodiments, the present invention utilizes isolation knife rest general assembly (3) by the main switch shaft assembly (20)
Position of switch casing (4) relative to the solid-sealing vacuum arc-chutes (17) is fixed on, specially：
Isolation knife rest general assembly (3), the contact spring (16), the master are opened by the moving contact pull rod shaft (2)
Close fairlead (15) and the main switch fairlead support (14) links together；
It is by the main switch fairlead support (14) that the main switch shaft assembly (20) is interior with switch casing (4)
Threaded insert be fixed together.
In some embodiments, the guide finger of the invention includes guide finger (5) and guide finger (11), by described
Guide finger (11) connects ground connection feeler lever general assembly (6) with the earthed switch connecting lever (13) in earthed switch shaft assembly (21)
Connect, and make in the gathering sill of the guide finger (5) the insertion slide rail (12).
In some embodiments, present invention additionally comprises adpting flange (25), it is used for：
Isolation knife rest general assembly (3) is connected with connecting shaft (24) is isolated；
Main switch connecting shaft (23) is connected with the main switch shaft assembly (20)；
Grounding connection axle (22) is connected with the earthed switch shaft assembly (21).
In some embodiments, switch casing (4) the of the invention position corresponding with the shrouding (9) is set
There is seal groove, sealing ring is provided with the seal groove, so that the casing (4) is sealed with the shrouding (9).
In some embodiments, the present invention is provided with close in the position that shaft flange (19) is connected with switch casing (4)
Seal, so that switch casing (4) is with described to isolate axle (24), the main switch axle (23) and the grounding shaft (22) close
Envelope.
Therefore, compared with prior art, the Advantageous of the Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed
Effect includes：
The invention discloses a kind of Threephase common-box high-voltage switch gear, including the general assembly of isolation knife rest, main switch shaft assembly and
Earthed switch shaft assembly, wherein：The main switch shaft assembly include moving contact pull rod shaft, contact spring, main switch fairlead and
Main switch fairlead support, for making solid-sealing vacuum arc-chutes close a floodgate or separating brake；It is described isolation knife rest general assembly, for realize every
Leave and close lock or disconnecting switch separating brake；The earthed switch shaft assembly includes earthed switch connecting lever, slide rail, ground connection feeler lever general assembly
And guide finger, closed a floodgate or ground connection separating brake for being grounded.The present invention will isolate knife rest general assembly and three-phase main switch and ground connection
After the part that switch module is included is cascaded by each switch spindle, it is placed in switch-box body, then by control
The connecting shaft of outside the enclosure processed, realizes to the Synchronous Transmission of threephase switch and control, while also appropriate increase threephase switch
Phase spacing.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, embodiment will be described below needed for the accompanying drawing to be used
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of structural side view of Threephase common-box high-voltage switch gear that Fig. 1 is proposed by the embodiment of the present invention；
A kind of topology view of Threephase common-box high-voltage switch gear that Fig. 2 is proposed by the embodiment of the present invention；
Fig. 3 is placed on the side view in casing by a kind of Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed；
Fig. 4 is placed on the upward view in casing by a kind of Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed.
Marginal data
1st, straight edge line 13, earthed switch connecting lever
2nd, moving contact pull rod shaft 14, main switch fairlead support
3rd, knife rest general assembly 15, main switch fairlead is isolated
4th, switch casing 16, contact spring
5th, guide finger 17, solid-sealing vacuum arc-chutes
6th, it is grounded feeler lever general assembly 18, curved bus
7th, grounding static contact 19, shaft flange
8th, sealing ring 20, main switch shaft assembly
9th, shrouding 21, earthed switch shaft assembly
10th, outlet casing tube 22, grounding connection axle
11st, guide finger 23, main switch axle
12nd, slide rail 24, isolation axle
25th, adpting flange
Specific embodiment
Just as described in background the invention, threephase switch of the prior art exist phase spacing it is compacter and assembling
More complicated problem.
In view of above the problems of the prior art, the present invention proposes a kind of Threephase common-box high-voltage switch gear.Will isolation
After the part that knife rest general assembly and three-phase main switch and earthed switch component are included is cascaded by each switch spindle, put
Put in switch-box body, then by controlling the connecting shaft of outside the enclosure, reach the Synchronous Transmission to threephase switch and control
Purpose, simultaneously as the three-phase spacing of the Threephase common-box high-voltage switch gear can be by switching case control, therefore, also
Threephase switch phase spacing can suitably be increased.
Based on foregoing invention design, below in conjunction with the accompanying drawing in the present invention, to the present invention in each central link part
Clear, complete description is carried out, it is clear that described embodiment is a part of embodiment of the invention, rather than whole realities
Apply example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained on the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of structural side view of the Threephase common-box high-voltage switch gear proposed by the embodiment of the present invention, bag
Isolation knife rest general assembly (3), main switch shaft assembly (20) and earthed switch shaft assembly (21) are included, wherein：Main switch shaft assembly
(20) including moving contact pull rod shaft (2), contact spring (16), main switch fairlead (15) and main switch fairlead support (14),
For making solid-sealing vacuum arc-chutes (17) close a floodgate or separating brake；Isolation knife rest general assembly (3), for realize disconnecting switch close a floodgate or every
Leave pass separating brake；Earthed switch shaft assembly (21) including earthed switch connecting lever (13), slide rail (12), ground connection feeler lever general assembly (6) with
And guide finger, closed a floodgate or ground connection separating brake for being grounded.In this manner it is possible to pass through main shaft by three groups of isolation knife rests general assembly (3),
Main switch shaft assembly (20) and earthed switch shaft assembly (21) are cascaded, and it is driven and control synchronization, specifically
Operating procedure will not be repeated here the elaboration in follow-up explanation.
In a preferred embodiment of the invention, also including outlet casing tube (10), specifically：By outlet casing tube 10 through envelope
, with switch casing 4 be fixed together shrouding 9 using fixture by plate 9, makes one end touching as disconnecting switch of outlet casing tube 10
Head is connected with the contact for isolating knife rest general assembly 3, and outlet casing tube 10 is fixed on one by inserts with grounding static contact 7
Rise.In this manner it is possible to passing through control isolation knife rest general assembly (3) realizes that switch closes a floodgate and separating brake.
It should be noted that also needing to for solid-sealing vacuum arc-chutes (17) to be fixed on switch casing (4) in the present invention
Relative to the position of main switch shaft assembly (20), so, subsequently can just be realized to sealing by controlling threephase switch
The control of formula vacuum interrupter (17), makes it close a floodgate or separating brake.
Specifically, also need to using isolate knife rest general assembly (3) by main switch shaft assembly (20) be fixed on switch casing (4) phase
For the position of solid-sealing vacuum arc-chutes (17), specially：
By moving contact pull rod shaft (2) will isolate knife rest general assembly (3), contact spring (16), main switch fairlead (15) and
Main switch fairlead support (14) links together；
By isolating knife rest general assembly (3) and main switch fairlead support (14) by main switch shaft assembly (20) and switch casing
(4) threaded insert in is fixed together.
Understood based on foregoing description, on the basis of realizing that threephase switch is synchronized, can also realized by main switch axle
Component (20) is controlled to solid-sealing vacuum arc-chutes (17), it is closed a floodgate or separating brake
In a preferred embodiment of the invention, guide finger of the invention includes guide finger (5) and guide finger (11), passes through
Guide finger (11) is connected feeler lever general assembly (6) is grounded with the earthed switch connecting lever (13) in earthed switch shaft assembly (21), and makes
In the gathering sill of the embedded slide rail (12) of guide finger (5).
As shown in Fig. 2 a kind of topology view of the Threephase common-box high-voltage switch gear proposed by the embodiment of the present invention, with reference to
Fig. 1 can be seen that in a preferred embodiment of the invention, and specific embodiment of the invention is：
Grounding shaft 22 is turned clockwise, ground connection feeler lever general assembly 6 can be made to left, ground connection feeler lever and grounding static contact 7
With reference to being grounded combined floodgate；By the rotate counterclockwise of grounding shaft 22, then feeler lever general assembly 6 is grounded to right translation, be grounded feeler lever and connect
Ground static contact 7 is separated, that is, be grounded separating brake.
The rotate counterclockwise of axle 24 will be isolated, blade in isolation knife rest general assembly 3 can be made flat with inserts in outlet casing tube 10
Head is combined closely as the contact of disconnecting switch with the blade for isolating knife rest general assembly (3), that is, realize that isolation is closed a floodgate；Will isolation
Axle 24 turns clockwise, then blade departs from the inserts homalocephalus of outlet casing tube 10, that is, realize isolation separating brake.
Main switch axle 23 is turned clockwise, makes to be moved on main switch fairlead 15, contact spring 16 is compressed, to be achieved specified
During contact pressure, solid-sealing vacuum arc-chutes 17 are realized closing a floodgate；By the rotate counterclockwise of main switch axle 23, make main switch fairlead 15
Move down, by the release of the energy of contact spring 16, solid-sealing vacuum arc-chutes 17 realize separating brake.
It should be noted that present invention additionally comprises adpting flange (25), the adpting flange (25) specifically for：By isolation knife
Frame general assembly (3) with isolate connecting shaft (24) connection, be connected with main switch shaft assembly (20) main switch connecting shaft (23) and general
Grounding connection axle (22) is connected with earthed switch shaft assembly (21).
As shown in figure 3, being placed in casing by a kind of Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed
Side view, in specific implement scene, the present invention is provided with sealing in the position that shaft flange (19) is connected with switch casing (4)
Circle, so that switch casing (4) is sealed with axle (24), main switch axle (23) and grounding shaft (22) is isolated, improves each connecting shaft
Sealing property between casing, and then improve overall sealing property.
As shown in figure 4, being placed in casing by a kind of Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed
Upward view, switch casing (4) the of the invention position corresponding with shrouding (9) is provided with seal groove, is provided with close in seal groove
Seal, so that casing (4) is sealed with shrouding (9), effectively raises overall sealing property.
As can be seen here, compared with prior art, the Threephase common-box high-voltage switch gear that the embodiment of the present invention is proposed it is beneficial
Technique effect includes：
The invention discloses a kind of Threephase common-box high-voltage switch gear, including the general assembly of isolation knife rest, main switch shaft assembly and
Earthed switch shaft assembly, wherein：The main switch shaft assembly include moving contact pull rod shaft, contact spring, main switch fairlead and
Main switch fairlead support, for making solid-sealing vacuum arc-chutes close a floodgate or separating brake；It is described isolation knife rest general assembly, for realize every
Leave and close lock or disconnecting switch separating brake；The earthed switch shaft assembly includes earthed switch connecting lever, slide rail, ground connection feeler lever general assembly
And guide finger, closed a floodgate or ground connection separating brake for being grounded.The present invention will isolate knife rest general assembly and three-phase main switch and ground connection
After the part that switch module is included is cascaded by each switch spindle, it is placed in switch-box body, then by control
The connecting shaft of outside the enclosure processed, realizes to the Synchronous Transmission of threephase switch and control, while also appropriate increase threephase switch
Phase spacing.
It should be noted that described embodiment is a part of embodiment of the application, rather than whole embodiments.
Based on the embodiment in the application, the institute that those of ordinary skill in the art are obtained on the premise of creative work is not made
There is other embodiment, belong to the scope of the application protection.
Modules can be integrated in one in the specific embodiment of the invention, it is also possible to be deployed separately, and above-mentioned module is closed
And be a module, it is also possible to it is further split into multiple submodule.
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram for being preferable to carry out scene, module in accompanying drawing or
Flow is not necessarily implemented necessary to the embodiment of the present invention.
It will be appreciated by those skilled in the art that module in device in implement scene can according to implement scene describe into
Row is distributed in the device of implement scene, it is also possible to carry out one or more dresses that respective change is disposed other than this implement scene
In putting.The module of above-mentioned implement scene can merge into a module, it is also possible to be further split into multiple submodule.
The embodiments of the present invention are for illustration only, and the quality of implement scene is not represented.
Disclosed above is only several specific implementation scenes of the embodiment of the present invention, but, the embodiment of the present invention not office
It is limited to this, the changes that any person skilled in the art can think of should all fall into the business limitation scope of the embodiment of the present invention.
Claims (8)
1. a kind of Threephase common-box high-voltage switch gear, it is characterised in that including isolation knife rest general assembly (3), main switch shaft assembly (20)
And earthed switch shaft assembly (21), wherein：
The main switch shaft assembly (20) includes moving contact pull rod shaft (2), contact spring (16), main switch fairlead (15) and master
Switching guide covers support (14), for making solid-sealing vacuum arc-chutes (17) close a floodgate or separating brake；
Isolation knife rest general assembly (3), for realizing that disconnecting switch is closed a floodgate or disconnecting switch separating brake；
The earthed switch shaft assembly (21) is including earthed switch connecting lever (13), slide rail (12), ground connection feeler lever general assembly (6) and leads
To pin, closed a floodgate or ground connection separating brake for being grounded.
2. Threephase common-box high-voltage switch gear as claimed in claim 1, it is characterised in that also including outlet casing tube (10), specifically
's：
By the outlet casing tube (10) through shrouding (9), the shrouding (9) is switched into casing (4) admittedly with described using fixture
It is scheduled on together, one end of the outlet casing tube (10) is isolated connecing for knife rest general assembly (3) with described as the contact of disconnecting switch
Touch is connected, and the outlet casing tube (10) is fixed together by inserts with grounding static contact (7).
3. Threephase common-box high-voltage switch gear as claimed in claim 1, it is characterised in that by the solid-sealing vacuum arc-chutes
(17) it is fixed on position of switch casing (4) relative to the main switch shaft assembly (20).
4. Threephase common-box high-voltage switch gear as claimed in claim 1, it is characterised in that using isolation knife rest general assembly (3)
The main switch shaft assembly (20) is fixed on position of switch casing (4) relative to the solid-sealing vacuum arc-chutes (17)
Put, specially：
Isolation knife rest general assembly (3), the contact spring (16), the main switch are led by the moving contact pull rod shaft (2)
Linked together to set (15) and the main switch fairlead support (14)；
By the main switch fairlead support (14) by the spiral shell in the main switch shaft assembly (20) and switch casing (4)
Line inserts is fixed together.
5. Threephase common-box high-voltage switch gear as claimed in claim 4, it is characterised in that the guide finger includes guide finger (5)
With guide finger (11), it is grounded described in feeler lever general assembly (6) and earthed switch shaft assembly (21) by the guide finger (11)
Earthed switch connecting lever (13) connection, and make in the gathering sill of the guide finger (5) the insertion slide rail (12).
6. the Threephase common-box high-voltage switch gear as described in claim 4 or 5, it is characterised in that also including adpting flange (25), uses
In：
Isolation knife rest general assembly (3) is connected with connecting shaft (24) is isolated；
Main switch connecting shaft (23) is connected with the main switch shaft assembly (20)；
Grounding connection axle (22) is connected with the earthed switch shaft assembly (21).
7. Threephase common-box high-voltage switch gear as claimed in claim 1, it is characterised in that the switch casing (4) and the envelope
The corresponding position of plate (9) is provided with seal groove, and sealing ring is provided with the seal groove so that the casing (4) with it is described
Shrouding (9) is sealed.
8. Threephase common-box high-voltage switch gear as claimed in claim 1, it is characterised in that in shaft flange (19) and the switch-box
The position of body (4) connection is provided with sealing ring, so that switch casing (4) isolates axle (24), the main switch axle with described
(23) and the grounding shaft (22) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199040.9A CN106783365B (en) | 2016-12-22 | 2016-12-22 | Three-phase common-box type high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199040.9A CN106783365B (en) | 2016-12-22 | 2016-12-22 | Three-phase common-box type high-voltage switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783365A true CN106783365A (en) | 2017-05-31 |
| CN106783365B CN106783365B (en) | 2020-04-10 |
Family
ID=58897112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611199040.9A Active CN106783365B (en) | 2016-12-22 | 2016-12-22 | Three-phase common-box type high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106783365B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847839A (en) * | 2010-06-22 | 2010-09-29 | 北京双杰电气股份有限公司 | 24kV solid insulated fully-closed switch equipment |
| CN104051180A (en) * | 2014-06-04 | 2014-09-17 | 柳州市海格电气有限公司 | 10kV pole-mounted vacuum load switch |
| CN204696022U (en) * | 2015-04-30 | 2015-10-07 | 国家电网公司 | Operating mechanism and use the Direct Action Type earthed switch of this operating mechanism |
| CN105405703A (en) * | 2015-12-28 | 2016-03-16 | 北京合纵科技股份有限公司 | Three-position isolating and grounding switch |
| CN205680596U (en) * | 2016-06-08 | 2016-11-09 | 河南森源电气股份有限公司 | Three-phase movable touch knife assembly and use three-station and the Inflatable ring main unit of this assembly |
-
2016
- 2016-12-22 CN CN201611199040.9A patent/CN106783365B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847839A (en) * | 2010-06-22 | 2010-09-29 | 北京双杰电气股份有限公司 | 24kV solid insulated fully-closed switch equipment |
| CN104051180A (en) * | 2014-06-04 | 2014-09-17 | 柳州市海格电气有限公司 | 10kV pole-mounted vacuum load switch |
| CN204696022U (en) * | 2015-04-30 | 2015-10-07 | 国家电网公司 | Operating mechanism and use the Direct Action Type earthed switch of this operating mechanism |
| CN105405703A (en) * | 2015-12-28 | 2016-03-16 | 北京合纵科技股份有限公司 | Three-position isolating and grounding switch |
| CN205680596U (en) * | 2016-06-08 | 2016-11-09 | 河南森源电气股份有限公司 | Three-phase movable touch knife assembly and use three-station and the Inflatable ring main unit of this assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106783365B (en) | 2020-04-10 |
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