CN203301033U - Modularized solid insulating ring main unit - Google Patents

Modularized solid insulating ring main unit Download PDF

Info

Publication number
CN203301033U
CN203301033U CN2013202457046U CN201320245704U CN203301033U CN 203301033 U CN203301033 U CN 203301033U CN 2013202457046 U CN2013202457046 U CN 2013202457046U CN 201320245704 U CN201320245704 U CN 201320245704U CN 203301033 U CN203301033 U CN 203301033U
Authority
CN
China
Prior art keywords
module
isolation
main unit
main body
ring main
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.)
Expired - Fee Related
Application number
CN2013202457046U
Other languages
Chinese (zh)
Inventor
尹永卫
刘涛
刘卫荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Orient Vacuum Electric Co Ltd
Original Assignee
Beijing Orient Vacuum Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Orient Vacuum Electric Co Ltd filed Critical Beijing Orient Vacuum Electric Co Ltd
Priority to CN2013202457046U priority Critical patent/CN203301033U/en
Application granted granted Critical
Publication of CN203301033U publication Critical patent/CN203301033U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a modularized solid insulating ring main unit which comprises a cabinet body, an insulating bus module, an isolation module, a main body module, a grounding module and an operation mechanism for controlling the action of the main body module and the grounding module, wherein the operation mechanism is arranged on the sidewall of the cabinet body, the main body module is connected with the operation mechanism through an insulating pull bar, the grounding module is arranged under the main body module, the grounding module is connected with the operation mechanism through a grounding pull bar, the isolation module is arranged at the right lower side of the grounding module, the isolation module comprises an isolation blade and an isolation pull bar in movable connection with the isolation blade, and the isolation pull bar is in movable connection with a rotary swing rod on the bottom of the operation mechanism. The ring main unit is modularized and is flexible in production process, convenient for installation and maintenance, compact in structure, small in size. The ring main unit employing full sealing technology, and has a work state monitoring device, thereby effectively preventing electric shock and being highly safe.

Description

A kind of modularization solid insulation ring main unit
Technical field
The utility model relates to the high-voltage switch gear field, relates in particular to a kind of modularization solid insulation ring main unit.
Background technology
Ring main unit is electric equipment commonly used in a kind of ring network power supply, and its core devices is on-load switch and fuse, because of ring main unit, sets up on the distribution branch road, and ring main unit also is considered to a kind of outlet switch cabinet, is the important switchgear of ring network power supply and terminal power supply.
A few days ago, on market, most ring main units are two kinds of air insulation ring main unit and SF6 insulation ring main units, and wherein, because the air insulation volume is large, cost is high, takes up room large, is eliminated gradually.SF6 insulation ring main unit inside has SF6 formula switch, and SF6 is a kind of inertia greenhouse gas, easily sneaks into the poisonous gas such as sulfur fluoride, and therefore, the supervision of its use is progressively strengthened.On the other hand, the day by day maturation and the vacuum switch that are accompanied by Vacuum Relay Technique have the characteristics such as the life-span is long, anti-interference good, volume is little, lightweight, become just gradually the main flow in market.
Chinese patent literature publication number CN102543558A discloses a kind of ring main unit vacuum switch module, comprise housing and be arranged at the first interior vacuum switch tube of housing, movable cross bar contact and be used for the second vacuum switch tube of ground connection, the static conductive rod of the first vacuum switch tube is connected with input terminal, its moving conductive rod is connected with operating mechanism by the first insulating bar, and but moving conductive rod is electrically connected to an end disjunction of movable cross bar contact, the other end of movable cross bar contact is connected with outlet terminal, and movable cross bar contact is connected with operating mechanism by the second insulating bar, one end of outlet terminal connection activity cross bar contact also is connected with the moving conductive rod of the second vacuum switch, the static conductive rod of the second vacuum switch is connected with earth terminal.This vacuum switch module can be realized ring main unit separating brake, isolation, ground connection, closing function, solved the problem that traditional direct-operated isolating switch only has two stations, and, by setting up the auxiliary earth terminal, can make fuse two ends reliable ground when being used for combined electrical apparatus.But this ring main unit vacuum switch module all parts contact closely, is difficult to split, and is unfavorable for maintenance and expansion; Its input terminal directly is connected with the static conductive rod of the first vacuum switch tube, easily causes danger during maintenance; Its operating state is difficult to effective monitoring, is unfavorable for that the staff judges its operating state, has certain security risk.
The utility model content
Limited in order to overcome existing vacuum ring main unit insulating capacity, operating state is difficult to monitoring, has certain defects such as security risk during maintenance, and technical problem to be solved in the utility model is to propose a kind of modularization solid insulation ring main unit, it adopts modularized design, manufacture process flexible, be convenient to I﹠M, adopt hermetically sealed technology during installation, the compact conformation volume is little, and have work shape monitoring device, can effectively evade risk of shock, safe.
For reaching this purpose, the utility model by the following technical solutions:
a kind of modularization solid insulation ring main unit, comprise cabinet, the isolated bus module, isolation module, main body module, earthing module, and the operating mechanism that is used for controlling described main body module and the action of described earthing module, described operating mechanism is located on the sidewall of described cabinet, described main body module is connected with described operating mechanism by insulated tension pole, described earthing module is located at described main body module below, described earthing module is connected with described operating mechanism by the ground connection pull bar, described isolation module is located at the lower right of described earthing module, described isolation module is flexibly connected by isolation pull bar and the rotation fork of being located at described operating mechanism bottom, described isolation module comprises the isolation blade that is positioned at described isolation module top, described isolation blade and described isolation pull bar are flexibly connected.
Further, described isolation module also comprises curved conducting rod and is set in curved sleeve pipe on described curved conducting rod, and described isolation blade is hinged in an end end points place and the described curved conducting rod of described curved conducting rod.
Further, described curved inside pipe casing is provided with inductance loop, and described inductance loop is connected with the ring main unit monitoring device, and whether be used for monitoring line place has electricity.
Further, described isolation blade has Double-cutter head, and described Double-cutter head both sides are equipped with butterfly spring, and described butterfly spring is used for providing pressure, makes described isolation blade be close to the first contact base.
Further, described main body module comprises the first vacuum interrupter that is coated with resilient coating, the first moving conductive rod that is connected with described insulated tension pole and the first static conductive rod that is connected with the first contact base by conducting strip, has fuse unit interface installation position on described main body module.
Further, described the first moving conductive rod that is positioned at described the first vacuum extinction outdoor is connected with described isolated bus module by being flexible coupling in its end points place.
Further, described earthing module comprises the second vacuum interrupter that is coated with resilient coating, the second moving conductive rod that is connected with described ground connection pull bar and the second static conductive rod that is connected with the second contact base.
Further, described operating mechanism comprises be used to the main body operating mechanism that drives described insulated tension pole action, is used for driving the ground connection operating mechanism of described ground connection backward stick action, the five anti-interlocking devices that are used for driving the isolation operating mechanism of described rotation fork action and are used for preventing misoperation.
Be preferably, described main body module is placed in insulation shell with the soft current-carrying part that is connected of described isolated bus module, described insulation shell is made by epoxy resin or Merlon or nylon, and its outer surface is provided with conductive coating, and described conductive coating and earth terminal are electrically connected.
Be preferably, described isolated bus module, described isolation module, described main body module, described earthing module and described operating mechanism adopt injection technique to be assembled in described cabinet, after assembling is completed, form all-sealed structure,
Be preferably, be provided with the fracture inspection hole on described cabinet, described port inspection hole one side is provided with lighting device.
The beneficial effects of the utility model are: the utility model adopts modularized design, not only manufactures process flexible, and is convenient to I﹠M; Between each module, layout and connected mode are ingenious, guarantee accuracy, stability and reliability when switch carries out separating brake, isolation and ground connection three Switch of working position; Operating mechanism inside is provided with five anti-interlocking devices, can effectively prevent the generation of misoperation, increases operating personnel's safety; Have additional the fracture inspection hole on cabinet, the fracture inspection hole can be used for the operator and observes the on off operating mode of main body module, thereby reduces the risk of shock in operating process; Curved inside pipe casing is provided with inductance loop, and whether inductance loop can be responded to line terminal place the electric current process, strengthens safety in utilization; Power interface, operating room and switch gear room adopt the unique spacer design, have reduced short trouble, have strengthened the reliability and safety of ring main unit.
Description of drawings
Fig. 1 is a kind of "on" position schematic diagram of modularization solid insulation ring main unit;
Fig. 2 is a kind of isolation schematic diagram of modularization solid insulation ring main unit;
Fig. 3 is a kind of ground state schematic diagram of modularization solid insulation ring main unit;
Fig. 4 is the structural representation of main body module;
Fig. 5 is the structural representation of isolation module;
Fig. 6 is the structural representation of earthing module.
In figure:
1, cabinet; 2, isolated bus module; 3, isolation module; 31, isolation pull bar; 32, isolation blade; 33, curved conducting rod; 34, curved sleeve pipe; 35, Double-cutter head; 4, main body module; 41, insulated tension pole; 42, the first vacuum interrupter; 43, the first moving conductive rod; 44, the first static conductive rod; 45, insulation shell; 46, the first moving contact; 47, the first fixed contact; 5, earthing module; 51, ground connection pull bar; 52, the second vacuum interrupter; 53, the second moving conductive rod; 54, the second static conductive rod; 55, the second moving contact; 56, the second fixed contact; 6, operating mechanism; 61, rotation fork; 7, conducting strip; 8, the first contact base; 9, the second contact base; 10, copper strips.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Fig. 1, Fig. 2, Fig. 3 are respectively the structural representations under a kind of combined floodgate, isolation and ground state of modularization solid insulation ring main unit.
A kind of modularization solid insulation ring main unit, the operating mechanism 6 that comprises cabinet 1, isolated bus module 2, isolation module 3, main body module 4, earthing module 5 and be used for controlling described main body module 4 and 5 actions of described earthing module.Described isolated bus module 2, described isolation module 3, described main body module 4, described earthing module 5 and described operating mechanism 6 adopt injection technique to be assembled in described cabinet 1, form enclosed construction, be subjected to the impact of environment less, be beneficial to the open air use of ring main unit.Adopt this modularized design, the process of not only manufacturing is flexible, and is convenient to I﹠M.
Described operating mechanism 6 is located on the sidewall of described cabinet 1, and described main body module 4 is connected with described operating mechanism 6 by insulated tension pole 41.Described earthing module 5 is located at described main body module 4 belows, and described earthing module 5 is connected with described operating mechanism 6 by ground connection pull bar 51.Described isolation module 3 is located at the lower right of described earthing module 5, described isolation module 3 comprises isolation blade 32 and the isolation pull bar 31 that is hinged with described isolation blade 32, isolation pull bar 31 is hinged with the rotation fork 61 of being located at described operating mechanism 6 bottoms, and above-mentioned hinged place is provided with bearing pin.Described operating mechanism 6 can be controlled described insulated tension pole 41 and described ground connection pull bar 51 translations, also controls the swing of described rotation fork 61, and is simple to operation.Described main body module 4 is connected with the first contact base 8, and described earthing module 5 is connected with the second contact base 9, and the first contact base 8 and the second contact base 9 larger distances of distance, have obvious isolation effect.This shows, between module, layout and connected mode are ingenious, have effectively guaranteed accuracy, stability and reliability when switch carries out separating brake, isolation and ground connection three Switch of working position.
Described operating mechanism 6 comprises be used to the main body operating mechanism that drives described insulated tension pole 41 actions, is used for driving the ground connection operating mechanism of described ground connection pull bar 51 actions, the five anti-interlocking devices that are used for driving the isolation operating mechanism of described rotation fork 61 actions and are used for preventing misoperation.
Wherein, five anti-interlockings refer to: prevent that 1, mistake from dividing, mistake is closed circuit breaker; 2, prevent that on-load from drawing, closing isolating switch; 3, prevent charged (extension) splice grafting ground (line) switch; 4, prevent from being with earth connection (switch) to close circuit breaker; 5, prevent the mistakenly entering into charged gap.Therefore, set up five anti-interlocking devices in operating mechanism inside, can effectively prevent the generation of misoperation, increase operating personnel's safety.
As shown in Figure 4, be the structural representation of main body module 4.
Described main body module 4 comprises the first vacuum interrupter 42 that is coated with resilient coating, the first moving conductive rod 43 that is connected with described insulated tension pole 41 and passes through the first static conductive rod 44 that conducting strip 7 is connected with the first contact base 8, has fuse unit interface installation position on described main body module 4.Wherein, an end of the first moving conductive rod 43 and the first static conductive rod 44 all is placed in described the first vacuum interrupter 42 inside, and respective tube inner terminal place is provided with the first moving contact 46 and the first fixed contact 47 with it.
Described the first moving conductive rod 43 that is positioned at described the first vacuum interrupter 42 outsides is connected with described isolated bus module 2 by being flexible coupling in its end points place, makes described the first moving conductive rod 43 conduct with described isolated bus module 2.Wherein, be flexible coupling for the copper strips connection.
Described main body module 4 is placed in insulation shell 45 with the soft current-carrying part that is connected of described isolated bus module 2, described insulation shell 45 is made by epoxy resin or Merlon or nylon, its outer surface is provided with conductive coating, described conductive coating and earth terminal are electrically connected, can effectively prevent in maintenance process, operating personnel or its described main body module 4 of metal tools distance of holding are too near with the soft connecting place of isolated bus module 2, produce spark, shock by electricity.
As shown in Figure 5, be the structural representation of isolation module.
The isolation pull bar 31 that described isolation module 3 comprises isolation blade 32, curved conducting rod 33, be hinged with described isolation blade 32 and be set in curved sleeve pipe 34 on described curved conducting rod 33, described isolation pull bar 31 is hinged with the rotation fork 61 of being located at described operating mechanism 6 bottoms, described isolation blade 32 is hinged in an end end points place and the described curved conducting rod 33 of described curved conducting rod 33, and above-mentioned hinged place is provided with bearing pin.
Described curved sleeve pipe 34 inside are provided with inductance loop, and described inductance loop is connected with the ring main unit monitoring device, and whether have electricity, strengthen the fail safe of the utility model use procedure if being used for monitoring line place.
Described isolation blade 32 has Double-cutter head 35, described Double-cutter head 35 both sides are equipped with butterfly spring, described butterfly spring is used for providing pressure, make described isolation blade 32 be close to the first contact base 8 or the second contact base 9, thereby strengthen the reliability that isolation blade 32 and the first contact base 8 and the second contact base 9 conduct.
As described in Figure 6, be the structural representation of earthing module.
Described earthing module 5 comprises the second vacuum interrupter 52 that is coated with resilient coating, the second moving conductive rod 53 that is connected with described ground connection pull bar 51 and the second static conductive rod 54 that is connected with the second contact base 9.Wherein, an end of the second moving conductive rod 53 and the second static conductive rod 54 all is placed in described the second vacuum interrupter 52 inside, and respective tube inner terminal place is provided with the second moving contact 55 and the second fixed contact 56 with it.
In addition, be provided with the fracture inspection hole on described cabinet 1, described port inspection hole one side is provided with lighting device, and the convenient operation person observes the on off operating mode of main body module, thereby reduces the risk of shock in operating process.
During concrete the use, as shown in Figure 1, be the "on" position schematic diagram of ring main unit.
Described operating mechanism 6 drives described rotation fork 61 and is rotated counterclockwise, rotation fork 61 drives described isolation blade 32 by described isolation pull bar 31 and turns clockwise,, until described isolation blade 32 inserts in the first contact bases 8, make conducting of the first static conductive rod 44 on isolation module 3 and described main body module 4.Then, described operating mechanism 6 drives the translation to the right of described insulated tension pole 41, and described insulated tension pole 41 drives described the first moving conductive rod 43 translation to the right, thereby makes described the first moving contact 46 and described the first fixed contact 47 conduct.Because the first moving contact 46 conducts by copper strips and described isolated bus module 2, so the time isolated bus module 2 high-tension electricity and the load conductance that connect logical, ring main unit is powered to external loading.
As shown in Figure 2, be the isolation schematic diagram of ring main unit.
Described operating mechanism 6 drives described rotation fork 61 and turns clockwise, and rotation fork 61 drives described isolation blade 32 by described isolation pull bar 31 and is rotated counterclockwise, until described isolation blade 32 inserts in the second contact base 9.Then, described operating mechanism 6 drives the translation left of described insulated tension pole 41, and described insulated tension pole 41 drives described the first moving conductive rod 43 translation left, thereby makes described the first moving contact 46 and described the first fixed contact 47 disconnect.At this moment, the high-tension electricity that isolated bus module 2 connects and load disconnect and isolation, the external loading dead electricity.
As shown in Figure 3, be the ground state schematic diagram of ring main unit.
At this moment, ring main unit is in the isolation position, described operating mechanism 6 drives the translation to the right of described ground connection pull bar 51, and described ground connection pull bar 51 drives described the second moving conductive rod 53 translation to the right, thereby makes described the second moving contact 55 and described the second fixed contact 56 conduct.At this moment, outer load and ground wire conduct, and can overhaul or carry out other load needs the test of ground connection.
Below only with embodiment, the utility model is illustrated, but the utility model is not limited to above-mentioned size and outward appearance illustration, more should not form any restriction of the present utility model.As long as within any improvement that the utility model is done or modification all belong to the protection range that the utility model claim advocates.

Claims (10)

1. modularization solid insulation ring main unit, comprise cabinet (1), isolated bus module (2), isolation module (3), main body module (4), earthing module (5), and the operating mechanism (6) that is used for controlling described main body module (4) and described earthing module (5) action, it is characterized in that: described operating mechanism (6) is located on the sidewall of described cabinet (1), described main body module (4) is connected with described operating mechanism (6) by insulated tension pole (41), described earthing module (5) is located at described main body module (4) below, described earthing module (5) is connected with described operating mechanism (6) by ground connection pull bar (51), described isolation module (3) is located at the lower right of described earthing module (5), described isolation module (3) comprises isolation blade (32) and the isolation pull bar (31) that is flexibly connected with described isolation blade (32), described isolation pull bar (31) is flexibly connected with the rotation fork (61) of being located at described operating mechanism (6) bottom.
2. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described isolation module (3) also comprises curved conducting rod (33) and is set in curved sleeve pipe (34) on described curved conducting rod (33), and described isolation blade (32) is hinged in an end end points place and the described curved conducting rod (33) of described curved conducting rod (33).
3. modularization solid insulation ring main unit according to claim 2, is characterized in that, described curved sleeve pipe (34) inside is provided with inductance loop, and described inductance loop is connected with the ring main unit monitoring device.
4. modularization solid insulation ring main unit according to claim 2, is characterized in that, described isolation blade (32) has Double-cutter head (35), and described Double-cutter head (35) both sides are equipped with butterfly spring.
5. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described main body module (4) comprises the first vacuum interrupter (42) that is coated with resilient coating, the first moving conductive rod (43) that is connected with described insulated tension pole (41) and passes through the first static conductive rod (44) that conducting strip (7) is connected with the first contact base (8), has fuse unit interface installation position on described main body module (4).
6. modularization solid insulation ring main unit according to claim 5, is characterized in that, is positioned at outside described the first moving conductive rod (43) of described the first vacuum interrupter (42) and is connected with described isolated bus module (2) by being flexible coupling in its end points place.
7. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described earthing module (5) comprises the second vacuum interrupter (52) that is coated with resilient coating, the second moving conductive rod (53) that is connected with described ground connection pull bar (51) and the second static conductive rod (54) that is connected with the second contact base (9).
8. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described operating mechanism (6) comprises be used to the main body operating mechanism that drives described insulated tension pole (41) action, is used for driving the ground connection operating mechanism of described ground connection pull bar (51) action, the five anti-interlocking devices that are used for driving the isolation operating mechanism of described rotation fork (61) action and are used for preventing misoperation.
9. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described main body module (4) is placed in insulation shell (45) with the soft current-carrying part that is connected of described isolated bus module (2), described insulation shell (45) is made by epoxy resin or Merlon or nylon, its outer surface is provided with conductive coating, and described conductive coating and earth terminal are electrically connected.
10. modularization solid insulation ring main unit according to claim 1, it is characterized in that, described isolated bus module (2), described isolation module (3), described main body module (4), described earthing module (5) and described operating mechanism (6) adopt injection technique to be assembled in described cabinet (1), described cabinet is provided with the fracture inspection hole on (1), and described port inspection hole one side is provided with lighting device.
CN2013202457046U 2013-05-08 2013-05-08 Modularized solid insulating ring main unit Expired - Fee Related CN203301033U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013202457046U CN203301033U (en) 2013-05-08 2013-05-08 Modularized solid insulating ring main unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013202457046U CN203301033U (en) 2013-05-08 2013-05-08 Modularized solid insulating ring main unit

Publications (1)

Publication Number Publication Date
CN203301033U true CN203301033U (en) 2013-11-20

Family

ID=49577016

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013202457046U Expired - Fee Related CN203301033U (en) 2013-05-08 2013-05-08 Modularized solid insulating ring main unit

Country Status (1)

Country Link
CN (1) CN203301033U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103219666A (en) * 2013-05-08 2013-07-24 北京京东方真空电器有限责任公司 Modular solid insulation ring network cabinet
CN103681092A (en) * 2013-11-29 2014-03-26 国家电网公司 Solid insulation isolation earthing switch device and fixing and encapsulating device thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103219666A (en) * 2013-05-08 2013-07-24 北京京东方真空电器有限责任公司 Modular solid insulation ring network cabinet
CN103219666B (en) * 2013-05-08 2017-01-25 北京京东方真空电器有限责任公司 Modular solid insulation ring network cabinet
CN103681092A (en) * 2013-11-29 2014-03-26 国家电网公司 Solid insulation isolation earthing switch device and fixing and encapsulating device thereof
CN103681092B (en) * 2013-11-29 2016-05-25 国家电网公司 Solid insulation isolation earthing switch device and sealing unit thereof

Similar Documents

Publication Publication Date Title
CN203871737U (en) Novel inflation switch cabinet
CN103219666B (en) Modular solid insulation ring network cabinet
CN203134677U (en) Insulating cylinder and main loop structure adopting same
CN202502937U (en) Vacuum switch module for ring network unit
CN203301033U (en) Modularized solid insulating ring main unit
CN204190252U (en) SF6 insulate vacuum demarcation switch cabinet
CN202796772U (en) 10kV rapid intelligent column breaker
CN202042412U (en) Touchable high-voltage circuit breaker
CN103489696B (en) A kind of vacuum circuit breaker with double breaks structure of 10kV box built-in disconnector
CN102543558B (en) Vacuum switch module for looped network cabinet
CN105633849A (en) SF6 insulating vacuum boundary switch cabinet
CN203225200U (en) Environment-friendly intelligent two-in-one outdoor on-pole vacuum circuit breaker
CN204927937U (en) Take looped netowrk cabinet of visual three -station isolation switch fracture function of auto -induction
CN204270968U (en) A kind of double-fracture vacuum switch module of multi-break high-pressure vacuum breaker
CN208522348U (en) Air chamber structure is isolated in bus
CN203055767U (en) Ring main unit directly-operated type vacuum switchgear
CN102664121B (en) Insulation cylinder and main loop structure utilizing same
CN204858383U (en) Circuit breaker is kept apart to complete three stations of cladding formula
CN203747287U (en) Solid insulation ring network cabinet
CN204179559U (en) A kind of GIS Direct Action Type manual operation isolation fracture
CN202601500U (en) Insulation barrel and main loop structure adopting same
CN208890337U (en) A kind of compact compound cable termination connection shell of GIS
CN104143451B (en) High-speed earthing switch and earthing switch assembly unit with same
CN202153499U (en) Fast-assembling vacuum load switch for no power-off operation
CN202906280U (en) Nitrogen insulating ring main unit

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131120

Termination date: 20170508