CN1174530C - Switch apparatus - Google Patents
Switch apparatus Download PDFInfo
- Publication number
- CN1174530C CN1174530C CNB991025547A CN99102554A CN1174530C CN 1174530 C CN1174530 C CN 1174530C CN B991025547 A CNB991025547 A CN B991025547A CN 99102554 A CN99102554 A CN 99102554A CN 1174530 C CN1174530 C CN 1174530C
- Authority
- CN
- China
- Prior art keywords
- switch
- distribution board
- switchgear
- position type
- gear room
- 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 - Lifetime
Links
Images
Classifications
-
- 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
-
- 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
- H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
-
- 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
- H02B13/005—Electrical connection between switchgear cells
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- Patch Boards (AREA)
Abstract
The invention relates to metal-enclosed, gas-insulated switchgears, especially medium voltage switchgears, with three-position disconnectors and power breakers, especially vacuum power breakers, arranged together in containers filled with gas. The containers have ducts for connecting the three-position disconnectors to the busbars of the switchgear which are arranged outside the container and ducts for connecting the power breakers to the cable terminals of the switchgears which are arranged outside the container. The switchgears are embodied as modular structured switch panels (SF) having hermetically sealed first switching chambers (R1) accommodating the three-position disconnectors (DS) and the busbars (SS) and hermetically sealed second chambers (R2) accommodating the power breakers. The first and second switching chambers (R1, R2) are interconnected by modular connector devices (MK) and have gas-tight cable ducts (KD).
Description
The present invention relates to a kind of gas isolated switchgear of metal box encapsulation, especially medium voltage switchgear equipment, it has some and is contained in the interior three-position type switch of aeration vessel jointly, with some power switchs, especially vacuum power switch, wherein, container has and is used for wall-through bushing insulator that the three-position type switch is connected with the bus that is arranged in external container and is used for the wall-through bushing insulator that power switch is connected with the switchgear cable joint that is arranged in external container.
The switchgear of the above-mentioned type is disclosed by DE 4445061 A1.Three-position type switch and the power switch that is designed to vacuum contactor jointly are installed in its aeration vessel.
Three-position type switch in container be arranged in being connected of bus outside the container fully, realize that by so-called wall-through bushing insulator the latter is run through container top airtightly.For the cable joint that equally externally provides, have other wall-through bushing insulators in the bottom of container, and the cable connector head can get at by the airtight wall-through bushing insulator in front.Each container has the wall-through bushing insulator of six airtight melting welding usually at least in this case, and the cable connector head can for example directly be inserted in above them by the male-tapered system.On these cable connector heads, can also connect overvoltage discharger or cable tester as required then.
As seen the container of these switchgears is airtight welding, and thereby is not having metal ground sealing under the situation of sealing device.In the switchgear of this type of welding, to structure with to the quality control that is accompanied by the course of processing very high requirement has been proposed, because no matter in still later fault of final inspection stage in continuous emerged in operation, all need to carry out very expensive maintenance work, under serious situation, may cause a complete set of one or more distribution boards of replacing switchgear.
The objective of the invention is to, the gas isolated switchgear of this metal box encapsulation is improved significantly aspect the structural design, and in addition when breaking down, can also be convenient to handle, but meanwhile can not limit their very favorable characteristics aspect useful life of this switchgear and the height operational reliability thereof.
The object of the present invention is achieved like this; Namely adopt a kind of gas isolated switchgear of metal box encapsulation; Especially medium voltage switchgear equipment; It has some and jointly is contained in the interior three-position type switch of aeration vessel; With some power switch; Especially vacuum power switch; Wherein, Container has the wall-through bushing insulator that is connected with the bus that is arranged in external container for the three-position type switch and the wall-through bushing insulator that is connected power switch and is connected with the switchgear cable connector that is arranged in external container; Wherein
1.1 switchgear is realized by the distribution board of modular structure;
1.2 the distribution board of modular structure respectively has one to hold three-position type switch and bus and hermetic closed first switch gear room and one jointly and hold power switch and hermetic closed second switch chamber;
1.3 in distribution board, settle three-position type switch and the front and back arranged in series power switch handled by means of push rod side by side;
1.4 first switch gear room of distribution board externally with a decompression with anti-interference electric arc and the distribution board cover plate that has to cofree air outlet slit be the boundary;
1.5 wall-through bushing insulator is realized by airtight modular connection or by airtight cable penetration insulating sleeve, wherein, first and second switch gear rooms are connected with the modular connection that its quantity and three-position type number of switches equate respectively, and the second switch chamber cable penetration insulating sleeve that always is equipped with its quantity to equate with power switch quantity.
By means of this novel modular construction distribution board, wherein, three-position type switch and bus always are positioned in their electrical connection district in the first hermetic closed switch gear room, the power switch that separates with these parts then is positioned in the hermetic closed second switch chamber, therefore these switchgears are pressed functional unit processing and are safeguarded, thereby have reduced their complexity on the whole.
Hermetic closed in this article switch gear room preferentially is interpreted as the container of the no sealing device that is electro-fusion welding.
These switch gear rooms are provided with wall-through bushing insulator by particularly advantageous mode, and they might make these switchgears in fact can assembling and dismounting under the additional situation about expending not arranged aspect the insulating gas as airtight modular connection.This point also meets each parts of changing switchgear under failure condition especially, and for example three-position type switch or power switch are compared the part of only just more changing damage in this case with known switchgear.Use unified modular connection as the element that is tightly connected between the different switch gear rooms, might make distribution board simple especially by the structure of modular designs.By in first switch gear room, settling the three-position type switch side by side, make their contact Plane of rotation be parallel to distribution board positive arrange and thereby only need smaller installation volume, thereby these three-position type switches are jointly handled by means of a push rod by fairly simple operating mechanism.Power switch also is in order to reach same purpose in the indoor front and back of second switch arranged in series.
Distribution disk cover by adopting the border that makes progress as first switch gear room and set the distribution board relief passage although these switchgears are compact structure forms, but still can satisfy the security requirement of relevant personnel's protection.
The gas isolated switchgear of the metal box encapsulation of Gai Bianing has following feature slightly:
2.1 switchgear is realized by the distribution board of modular structure;
Hold three-position type switch and bus and hermetic closed first switch gear room and one jointly and hold mains switch and hermetic closed second switch chamber 2.2 the distribution board of modular structure has one respectively;
2.3 in distribution board, settle three-position type switch and the front and back arranged in series power switch handled by means of push rod side by side;
2.4 first switch gear room of distribution board is the boundary with the distribution disk cover with anti-interference electric arc and oriented cofree air outlet slit of a decompression externally;
2.5 wall-through bushing insulator is realized by airtight modular connection or by airtight cable penetration insulating sleeve, wherein, first and second switch gear rooms are connected with the modular connection that its quantity and three-position type number of switches equate respectively, and the second switch chamber modular connection that always is equipped with its quantity to equate with power switch quantity;
2.6 the modular connection of second switch chamber is connected with the 3rd switch gear room, the airtight cable penetration insulating sleeve that the latter is equipped with its quantity to equate with cable joint quantity.
The difference of these switchgears and described first kind of switchgear mainly is to add the 3rd switch gear room is set, and settles the cable joint that separates with power switch in this switch gear room.As in the first kind switchgear, these switch gear rooms here, being meant the second and the 3rd switch gear room in this case, equally also is to connect airtightly by means of modular connection, so that the advantage that preface is mentioned is more outstanding in these switchgears.For the purpose of measuring, modular connection can be convenient to be equipped with corresponding converter in the outside, switch gear room with getting at.
According to the favourable design of the present invention, the cable penetration insulating sleeve not only can contain integral type inner conical joint, and can contain integral type male-tapered joint.
By another particularly advantageous design of the present invention, in the gas isolated switchgear of metal box encapsulation, their distribution board is connected into so-called vertical coupler (Laengskupplungen) on function, it is characterized in that:
5.1 the distribution board of switchgear is connected with the airtight distribution board jockey that bus number equates with its quantity;
5.2 these distribution board jockeys are identical with the modular connection structure.
The modular connection of these same structure patterns can be combined into the diverse switchgear of type with the distribution board that simple mode will so design by modular structure like a cork.
Describe the present invention in detail by means of in two accompanying drawings graphic representation and the embodiment that greatly simplified below, wherein:
Fig. 1 has represented a kind of a kind of possible design that the switchgear of two switch gear rooms that separate is arranged in the front elevation of right part, by the represented end view of figure left part as can be seen, this switchgear is designed to the switchgear of vertical coupler;
Fig. 2 represents the switchgear that three switch gear rooms independently of one another are arranged through changing.
Fig. 1 represents the front elevation and the end view of the gas isolated switchgear of metal box encapsulation, and it comprises distribution board SF and another distribution board SFn, is used to constitute a kind of switchgear modification with vertical coupler.In distribution board SF, the district is provided with first hermetic closed R1 of switch gear room at an upper portion thereof, and it has and is positioned at wherein the three-position type switch DS that can handle by means of push rod SG ... and with they corresponding bus SS Be provided with second hermetic closed R2 of switch gear room in its underpart district, it has power switch LS, cable penetration insulating sleeve KD and the socket SB that is positioned at wherein.Can find out that in addition R1 top, first switch gear room is the boundary with the distribution disk cover SA of anti-interference electric arc, under failure condition, the distribution disk cover is upwards drawn hot gas along the direction of arrow targetedly in conjunction with the relief passage DK that runs through distribution board SF from distribution board SF.By the expanded metals inserts SM in distribution disk cover SA inside, meaning combines with it can realize that also corresponding heat reduces, so under failure condition safety of persons is played highly effective effect.Visible in addition a plurality of modular connections, for see clearer for the purpose of, wherein have only a modular connection to indicate with MK, they are connected to each other first and second R1 of switch gear room, R2 like this, promptly between the hermetic closed R1 of switch gear room, R2, no matter at the confined state of distribution board SF still at disassembly status, can make effectively between the R1 of these switch gear rooms, the R2 Gas Exchange not take place.Therefore, by means of these modular connections MK, guarantee all no longer needing any surcharge expenditure that causes because of gas under the situation of maintenance during not only in when assembling but also in dismounting.
Modular connection MK is designed so that they can hold the current transformer that is designed to the toroidal core measurement translator when needed, as shown in the figure.
Left side at distribution board SF front view is other, the end view of visible distribution board SF and another additional distribution board SFn, and they are used to realize a kind of switchgear that has a vertical coupler.Except connect these two R1 of switch gear room, R2 by means of modular connection (for see clearer for the purpose of, have only a modular connection to indicate in these modular connections with MK) as can be seen, distribution board SF and another distribution board SFn are connected by distribution board jockey (only drawn unique here and represent with FK).These distribution board jockeys FK has the characteristic identical with modular connection MK and identical with their structures, for the purpose of measuring is equipped with current transformer SW by identical mode, as shown in the figure.
Fig. 2 represents the gas isolated switchgear of another kind of metal box encapsulation, wherein, compares with switchgear shown in Figure 1 in distribution board SF, and cable penetration insulating sleeve KD is placed among independent the 3rd R3 of switch gear room.As seen from the figure, second switch chamber R2 not only had been connected by modular connection MK with first R1 of switch gear room but also with the 3rd R3 of switch gear room.Thus, cable penetration insulating sleeve KD also can insert the first and second gas-filled switching tube chamber R1, R2 insusceptibly under the situation of needs.
Claims (3)
1. the gas isolated switchgear of a metal box encapsulation, it has some and is contained in the interior three-position type switch of aeration vessel jointly, with some power switchs, wherein, container has and is used for wall-through bushing insulator that the three-position type switch is connected with the bus that is arranged in external container and is used for power switch and the wall-through bushing insulator that the switchgear cable joint that is arranged in external container is connected, and it is characterized in that:
1.1 this switchgear is realized by the distribution board (SF) of modular structure;
Hold three-position type switch (DS) and bus (SS) and hermetic closed first switch gear room (R1) and one jointly and hold power switch (LS) and hermetic closed second switch chamber (R2) 1.2 the distribution board of this modular structure (SF) has one respectively;
1.3 in distribution board (SF), settle three-position type switch and the front and back arranged in series power switchs (LS) handled by means of push rod (SG) side by side;
1.4 first switch gear room (R1) of distribution board (SF) is the boundary with the distribution disk cover (SA) with anti-interference electric arc and oriented cofree air outlet slit of a decompression externally;
1.5 wall-through bushing insulator is by airtight modular connection (MK) or pass through airtight cable penetration insulating sleeve (KD) realization, wherein,
First and second (the R1 of switch gear room, R2) be connected with the modular connection (MK) that its quantity and three-position type switch (DS) quantity equate respectively, and second switch chamber (R2) cable penetration insulating sleeve (KD) of always being equipped with its quantity to equate with power switch (LS) quantity.
2. the gas isolated switchgear of a metal box encapsulation, it has some and is contained in aeration vessel interior three-position type switch and power switch jointly, wherein, container has and is used for wall-through bushing insulator that the three-position type switch is connected with the bus that is arranged in external container and is used for power switch and the wall-through bushing insulator that the switchgear cable joint that is arranged in external container is connected, and it is characterized in that:
2.1 this switchgear is realized by the distribution board (SF) of modular structure;
Hold three-position type switch (DS) and bus (SS) and hermetic closed first switch gear room (R1) and one jointly and hold power switch (LS) and hermetic closed second switch chamber (R2) 2.2 the distribution board of this modular structure (SF) has one respectively;
2.3 in distribution board (SF), settle three-position type switch and the front and back arranged in series power switchs (LS) handled by means of push rod (SG) side by side;
2.4 first switch gear room (R1) of distribution board (SF) is the boundary with the distribution disk cover (SA) with anti-interference electric arc and oriented cofree air outlet slit of a decompression externally;
2.5 wall-through bushing insulator is by airtight modular connection (MK) or pass through airtight cable penetration insulating sleeve (KD) realization, wherein,
First and second (the R1 of switch gear room, R2) be connected with the modular connection (MK) that its quantity and three-position type switch (DS) quantity equate respectively, and second switch chamber (R2) modular connection (MK) of always being equipped with its quantity to equate with power switch (LS) quantity;
2.6 the modular connection (MK) of second switch chamber (R2) is connected with the 3rd switch gear room (R3), the airtight cable penetration insulating sleeve (KD) that the 3rd switch gear room is equipped with its quantity to equate with cable joint quantity.
3. according to the gas isolated switchgear of claim 1 or 2 described metal box encapsulation, it is characterized in that:
3.1 described cable penetration insulating sleeve (KD) is equipped with integral type inner conical joint.
4. according to the gas isolated switchgear of claim 1 or 2 described metal box encapsulation, it is characterized in that:
4.1 described cable penetration insulating sleeve (KD) is equipped with integral type male-tapered joint.
5. according to claim 1 or the gas isolated switchgear of 2 described metal box encapsulation, it is characterized in that:
5.1 the distribution board (SF) of switchgear (SA) is connected with the airtight distribution board jockey (FK) that bus number equates with its quantity;
5.2 distribution board jockey (FK) is identical with modular connection (MK) structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19809839A DE19809839A1 (en) | 1998-03-02 | 1998-03-02 | Metal-enclosed, gas-insulated switchgear with gas-filled containers |
| DE19809839.1 | 1998-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1227983A CN1227983A (en) | 1999-09-08 |
| CN1174530C true CN1174530C (en) | 2004-11-03 |
Family
ID=7860078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991025547A Expired - Lifetime CN1174530C (en) | 1998-03-02 | 1999-03-02 | Switch apparatus |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1060548A1 (en) |
| KR (1) | KR100588769B1 (en) |
| CN (1) | CN1174530C (en) |
| DE (1) | DE19809839A1 (en) |
| ID (1) | ID26499A (en) |
| IL (1) | IL138215A (en) |
| MY (1) | MY130210A (en) |
| TR (1) | TR200003221T2 (en) |
| TW (1) | TW425742B (en) |
| WO (1) | WO1999045617A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19816592B4 (en) * | 1998-04-08 | 2006-04-13 | Siemens Ag | Drive device for switchgear of power supply and distribution |
| DE10203035B4 (en) * | 2002-01-26 | 2010-04-15 | Abb Ag | Gas-insulated high-voltage switchgear |
| DE10305464B4 (en) * | 2003-02-04 | 2009-02-19 | Siemens Ag | Switchgear with shielding elements for shielding parasitic magnetic fields |
| US7239490B2 (en) | 2003-09-22 | 2007-07-03 | Eaton Corporation | Medium voltage vacuum circuit interrupter |
| DE102005009207A1 (en) * | 2005-02-25 | 2006-08-31 | Abb Technology Ag | Switchgear for use in medium voltage sector, has two cable panels designed to form module, fuse panel designed to form another module, and support unit is attached between front and rear walls of each module |
| DE202005014186U1 (en) * | 2005-07-08 | 2005-12-29 | Dehn + Söhne Gmbh + Co. Kg | Over-voltage suppressor for industrial bus bar distribution system, has connection point that interacts with a status monitoring circuit, and module-shaped structural component surrounded by housing adapted to respective application |
| DE102006027164B3 (en) * | 2006-06-06 | 2007-11-22 | Siemens Ag | Medium-voltage switchgear`s multi-phase control panel, has contact systems controlled such that conductive connection is formed between switching poles and bus bar connectors by each controllable contact system |
| ES2322828B2 (en) * | 2006-09-21 | 2010-04-07 | Ormazabal Distribucion Primaria, S.A. | MODULAR ELECTRICAL DISTRIBUTION APARTMENT. |
| DE102010063130A1 (en) * | 2010-12-15 | 2012-06-21 | Abb Technology Ag | Switch cabinet for operating a medium or high voltage switchgear |
| JP5783343B1 (en) * | 2013-11-19 | 2015-09-24 | 三菱電機株式会社 | Busbar connection device and switchgear using the same |
| DE102014104541A1 (en) | 2014-03-31 | 2015-10-01 | Schneider Electric Industries Sas | Control panel |
| EP3671995B1 (en) * | 2018-12-21 | 2022-05-11 | ABB Schweiz AG | Connection apparatus for a circuit breaker of a medium voltage switchgear |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8512168U1 (en) * | 1985-04-24 | 1985-08-14 | Siemens AG, 1000 Berlin und 8000 München | Electrical isolation arrangement |
| DE4001909A1 (en) * | 1990-01-24 | 1991-07-25 | Sachsenwerk Ag | Coupling set connecting gas isolated switches in separate housing - has two=piece plug contacts phase-wise couplable to bus=bars encapsulated in bridging conduit |
| DE4445061A1 (en) | 1994-12-07 | 1996-06-13 | Siemens Ag | Metal-enclosed switchgear with a vacuum switching device |
-
1998
- 1998-03-02 DE DE19809839A patent/DE19809839A1/en not_active Withdrawn
-
1999
- 1999-02-22 ID IDW20001699A patent/ID26499A/en unknown
- 1999-02-22 IL IL13821599A patent/IL138215A/en not_active IP Right Cessation
- 1999-02-22 WO PCT/DE1999/000553 patent/WO1999045617A1/en active IP Right Grant
- 1999-02-22 KR KR1020007009719A patent/KR100588769B1/en not_active IP Right Cessation
- 1999-02-22 TR TR2000/03221T patent/TR200003221T2/en unknown
- 1999-02-22 EP EP99913096A patent/EP1060548A1/en not_active Withdrawn
- 1999-03-02 MY MYPI99000763A patent/MY130210A/en unknown
- 1999-03-02 CN CNB991025547A patent/CN1174530C/en not_active Expired - Lifetime
- 1999-03-02 TW TW088103152A patent/TW425742B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IL138215A0 (en) | 2001-10-31 |
| TW425742B (en) | 2001-03-11 |
| CN1227983A (en) | 1999-09-08 |
| IL138215A (en) | 2005-08-31 |
| KR100588769B1 (en) | 2006-06-14 |
| TR200003221T2 (en) | 2001-03-21 |
| DE19809839A1 (en) | 1999-09-09 |
| ID26499A (en) | 2001-01-11 |
| WO1999045617A1 (en) | 1999-09-10 |
| KR20010041540A (en) | 2001-05-25 |
| EP1060548A1 (en) | 2000-12-20 |
| MY130210A (en) | 2007-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1061181C (en) | Switching device | |
| US7391605B2 (en) | Encapsulated gas-insulated switchgear assembly | |
| CN1038373C (en) | Multi-phase high voltage switching device with metal casing filled by high pressure gas | |
| CN1174530C (en) | Switch apparatus | |
| US8481881B2 (en) | Electric circuit breaker and switchgear panel with circuit breaker | |
| CN1045033C (en) | Metallgekapselte gasisolierte schaltanlage | |
| US6335502B1 (en) | Vacuum switch and vacuum switch gear using the vacuum switch | |
| US6624372B1 (en) | Gas insulated switchgear | |
| CN1327284A (en) | Gas insulation switch device | |
| US7075778B2 (en) | Hybrid gas-insulated switchgear | |
| CN1327285A (en) | Gas insulation switch device | |
| CN1041152C (en) | Fully closed combined electric unit | |
| US6195253B1 (en) | Substation | |
| CN1042276C (en) | Isolated switch used in high voltage switch device with metallic case and gas isolation | |
| CN102986100A (en) | Switchgear with single-phase insulation comprising air and screens | |
| US4379957A (en) | Modular "Y"-type enclosure elements for gas insulated substations | |
| EP1496585B1 (en) | Metal closed type distributor | |
| CN101617450B (en) | High-voltage switchgear | |
| US6459569B1 (en) | Switchgear | |
| JPH08340610A (en) | Gas insulated switchgear | |
| CN1065354C (en) | Metal-clad switchgear with a vacuum switching device | |
| US7485807B2 (en) | Gas-insulated bus bar component comprising outdoor bushings | |
| Bolin et al. | Gas insulated switchgear GIS-State of the art | |
| JP2000197221A (en) | Closed type gas insulated three-phase switchgear | |
| JP2798930B2 (en) | Gas insulated switchgear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041103 |
|
| CX01 | Expiry of patent term |