EP1928065B1 - Medium voltage gas-insulated switch-disconnector - Google Patents
Medium voltage gas-insulated switch-disconnector Download PDFInfo
- Publication number
- EP1928065B1 EP1928065B1 EP06125177.3A EP06125177A EP1928065B1 EP 1928065 B1 EP1928065 B1 EP 1928065B1 EP 06125177 A EP06125177 A EP 06125177A EP 1928065 B1 EP1928065 B1 EP 1928065B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disconnector
- switch
- shell
- medium voltage
- gas
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 16
- 239000007769 metal material Substances 0.000 claims description 15
- 238000005204 segregation Methods 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- H01H31/003—Earthing switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H2009/0292—Transparent window or opening, e.g. for allowing visual inspection of contact position or contact condition
-
- 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
- H01H33/02—Details
- H01H33/022—Details particular to three-phase circuit breakers
-
- 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
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
Definitions
- the present invention relates to a medium voltage gas-insulated switch-disconnector, in particular a three-phase, three positions general purpose switch-disconnector with integrated earthing switch suitable for medium voltage.
- the switch-disconnector of the invention are typically used in medium voltage switchgear within secondary distribution substations for supplying lines, power transformers and networks.
- Medium voltage gas-insulated switch-disconnector are well known in the art. They usually consist of a gas-tight casing that defines an internal space filled with an insulating gas and houses, for each phase, one or more moving contacts and one or more corresponding fixed contacts.
- a switch-disconnector comprises for each phase, a moving contact, a fixed contact and an earthing contact, the moving contact being able to move between open, closed and earthed positions.
- the switch-disconnectors need to satisfy a number of requirements which often cannot be met by the same switch-disconnector. For instance, in general it is desirable to have a switch-disconnector which is as compact as possible so as to occupy the minimum possible space within the unit it is installed in. In some cases, it is necessary to have a metal earthed segregation between the upper and lower compartment of the unit and this is generally achieved by using a switch-disconnector provided with a stainless steel casing. On the other hand, in such a case, the need of maintaining a minimum electrical distance with respect to the busbar does not allow to put the switch-disconnector too close to the busbars themselves, with a consequent waste of internal space on the unit.
- the present invention is aimed at providing a switch-disconnector having the highest possible number of standardized components, thereby reducing manufacturing and maintenance costs.
- EP 0 485 306 A1 discloses a two shell plastic housing for a Medium Voltage gas-insulated switch-disconnector.
- FR 2 259 459 discloses a Medium Voltage gas-insulated switch-disconnector according to the pre-amble of claim 1.
- the present invention relates to a Medium Voltage gas-insulated switch-disconnector as defined by claim 1.
- one of the half shells is made of polymeric material, it is possible to have a reasonably compact size of the overall housing, particularly if the bushings are integrated with said half-shell made of polymeric material, as better described below.
- the polymeric material is insulating, it is possible to reduce the electrical distance with respect to, e.g., the busbars, thereby reducing the occupied volume within a panel.
- the half shell is made of mental material and earthed
- a metal earthed segregation between the upper part and the lower part of the unit in which the is switch-disconnector is installed is achieved e.g. between the busbar compartment and the feeder compartment of a metal-enclosed switchgear.
- the metal earthed segregation, provided by the half-shell made of metal material considerably reduces the possibility of a short-circuit between the phases and between the upper and lower contacts of the same phase due to leakage currents.
- the metal material guarantee safe performance in case of internal fault.
- a Medium Voltage switchgear including a switch-disconnector according to the general definition given above, is also part of the present invention
- the gas-insulated medium voltage switch-disconnector comprises a gas-tight housing 2 which contains an insulating gas. Insulating gases, such as SF6, are well-known and generally used in the art and will not further described here.
- the switch-disconnector also comprises, for each phase, a moving contact, a fixed contact and an earthing contact (not shown in the attached figures) which are positioned inside said housing.
- a three-phase switch-disconnector is shown, having a corresponding number moving contacts, fixed contacts and earthing contacts.
- An operating mechanism 3 (shown only in figure 6 ) is generally used for moving said moving contact between open, closed and earthed positions, according to well known procedures.
- the housing may also include a pressure indicator, an exhaust valve or, in general, a pressure relief system for any gas overpressure, as well as one or more inspection windows for visual check of the contacts position.
- the gas-tight housing 2 comprises a first, upper, half-shell 21 and a second, lower, half shell 22, which are coupled to each other in a gas-tight manner.
- one of two half shells 21, 22 is made of metal material, while the other is made of polymeric material.
- the upper half-shell 21 and the lower half shell 22 advantageously comprise a flanged-portion, respectively 210 and 220, for the mutual interface between them.
- Said flanged portions 210 and 220 may comprise one or more seats for sealing means, such as gaskets, and may be provided with coupling and fixing means for keeping the two half-shells 21 and 22 joined in a gas-tight manner.
- sealing means such as gaskets
- screw means can be used for fixing the two-half shells 21, 22.
- the switch-disconnector comprises a first bushing 41 associated with said first, upper, half-shell 21 and a second bushing 42 associated with said second, lower, half-shell 22.
- the first, upper, half-shell 21 is made of polymeric material and the second, lower, half-shell 22 is made of metal material.
- the lower half-shell made of metal it is possible to access the lower compartment even if the busbars are under voltage.
- the polymeric material used for one of the two half-shells can be an epoxy resin; other kinds of polymeric materials can obviously be used, according to the needs.
- the metal material used for the other of the two half-shells can be steel, for example stainless steel or pre-galvanized steel.
- the half-shell made of polymeric material comprises, for each phase, an integral-made bushing, i.e. the half-shell 21 and the three bushings 41 are made in a single piece.
- an integral-made bushing i.e. the half-shell 21 and the three bushings 41 are made in a single piece.
- the switch-disconnector 1 of the invention comprises, for each phase, a bushing 42 assembled with said half-shell 22 made of metal material, i.e. three bushing 42 for the three-phase switch-disconnector of the attached figures.
- a bushing 42 assembled with said half-shell 22 made of metal material, i.e. three bushing 42 for the three-phase switch-disconnector of the attached figures.
- the bushing may comprise, integrated in their structure, a voltage indicator.
- the first bushings 41 support the fixed contact (not shown) positioned inside the housing 2, while the second bushings 42 support the moving contact (not shown) also positioned inside the housing 2.
- the moving contact can be a blade pivotally supported by the terminal 420 of the bushing 42, said blade being capable to move between a close position, in which it is engaged with the corresponding fixed contact, an earthed position in which it is engaged with a corresponding earthing contact, and an open position, in which it not engaged with said fixed or earthing contacts.
- a driving shaft (not shown) is normally provided and connects the three moving contacts to the operating mechanism 3 which, as shown in figure 6 , is positioned externally to the housing 2.
- said half-shell 22 made of metal material is earthed.
- the earthing contact (not shown) is connected to said half-shell 22 made of metal material.
- the present invention also relates to a medium voltage switchgear 10, said switchgear comprising a switch-disconnector 1 according to what defined above.
- the medium voltage switchgear 10 comprises a casing 101 which defines defining an internal space.
- the switch-disconnector 1 is generally positioned inside said casing 101 so as to divide said internal space in a first, upper, compartment 110 and a second, lower, compartment 120.
- the operating mechanism 3, for moving the moving contacts of the switch-disconnector between open, closed and earthed positions, is normally positioned outside the casing 101 and is connected to said moving contact through a driving shaft.
- the upper compartment 110 can be for instance the busbar compartment, while the lower compartment 120 can be the feeder, or cable, compartment.
- the switch-disconnector 1 provides a metal-earthed segregation between said first, upper, compartment 110 and said second, lower, compartment 120.
- the extremely compact structure of the first half shell 21 made of insulating polymeric material, e.g. epoxy resin allows reducing the electrical distance with respect to the busbar, thereby minimizing the occupied volume inside the casing itself.
- switch-disconnector thus conceived may undergo numerous modifications and come in several variants, all coming within the scope of the invention as defined by the claims. Moreover, all the component parts described herein may be substituted by other, technically equivalent elements. In practice, the component materials and dimensions of the device may be of any nature, according to need and the state of the art.
Landscapes
- Gas-Insulated Switchgears (AREA)
Description
- The present invention relates to a medium voltage gas-insulated switch-disconnector, in particular a three-phase, three positions general purpose switch-disconnector with integrated earthing switch suitable for medium voltage. The switch-disconnector of the invention are typically used in medium voltage switchgear within secondary distribution substations for supplying lines, power transformers and networks.
- Medium voltage gas-insulated switch-disconnector are well known in the art. They usually consist of a gas-tight casing that defines an internal space filled with an insulating gas and houses, for each phase, one or more moving contacts and one or more corresponding fixed contacts. In a typical application, a switch-disconnector comprises for each phase, a moving contact, a fixed contact and an earthing contact, the moving contact being able to move between open, closed and earthed positions.
- Depending on the intended application, the switch-disconnectors need to satisfy a number of requirements which often cannot be met by the same switch-disconnector. For instance, in general it is desirable to have a switch-disconnector which is as compact as possible so as to occupy the minimum possible space within the unit it is installed in. In some cases, it is necessary to have a metal earthed segregation between the upper and lower compartment of the unit and this is generally achieved by using a switch-disconnector provided with a stainless steel casing. On the other hand, in such a case, the need of maintaining a minimum electrical distance with respect to the busbar does not allow to put the switch-disconnector too close to the busbars themselves, with a consequent waste of internal space on the unit.
- It is therefore necessary to have a number of switch-disconnectors tailored according to the intended application, in terms of size and performances, with a consequent increase of design and manufacturing costs. This lack of standardization has a further drawback on the manufacturing costs, as well as on the maintenance costs, since it is necessary to have a number of different components and spare parts according to the different types of switch-disconnector.
- It is therefore an object of the present invention to provide a switch-disconnector which is highly standardized (in terms of features, size and performances), in the sense that it can satisfy a number of different requirements thereby making possible its use in a number of different applications that cannot be covered nowadays by a single apparatus.
- More in particular, it is an object of the present invention to provide a switch-disconnector which allows to minimize the occupied space inside the unit it is installed in, and at the same time can satisfy the requirements of the relevant Standards, e.g. the metal earthed segregation between the compartments of the unit.
- As a further object, the present invention is aimed at providing a switch-disconnector having the highest possible number of standardized components, thereby reducing manufacturing and maintenance costs.
-
EP 0 485 306 A1 -
FR 2 259 459 - Thus, the present invention relates to a Medium Voltage gas-insulated switch-disconnector as defined by claim 1.
- In this way, it is possible to overcome some of the disadvantages and drawbacks of the gas-insulated switch-disconnectors of the known art. Thanks to the fact that one of the half shells is made of polymeric material, it is possible to have a reasonably compact size of the overall housing, particularly if the bushings are integrated with said half-shell made of polymeric material, as better described below. In addition, being that the polymeric material is insulating, it is possible to reduce the electrical distance with respect to, e.g., the busbars, thereby reducing the occupied volume within a panel.
- On the other end, being that one of the half shell is made of mental material and earthed, due to which a metal earthed segregation between the upper part and the lower part of the unit in which the is switch-disconnector is installed, is achieved e.g. between the busbar compartment and the feeder compartment of a metal-enclosed switchgear. Furthermore, the metal earthed segregation, provided by the half-shell made of metal material, considerably reduces the possibility of a short-circuit between the phases and between the upper and lower contacts of the same phase due to leakage currents. Also, the metal material guarantee safe performance in case of internal fault.
- A Medium Voltage switchgear, including a switch-disconnector according to the general definition given above, is also part of the present invention
- Further characteristics and advantages of the invention will emerge from the description of preferred, but not exclusive embodiments of the switch-disconnector according to the invention, non-limiting examples of which are provided in the attached drawings, wherein:
-
Figure 1 is a perspective view of a possible embodiment of a switch-disconnector according to the invention; -
Figure 2 is a perspective view of the housing of the switch-disconnector offigure 1 , showing the first-half shell separated from the second half-shell; -
Figure 3 is a detailed view of the first, upper, half shell of the switch-disconnector according tofigure 2 ; -
Figure 4 is a detailed view of the second, lower, half-shell of the switch-disconnector according tofigure 2 ; -
Figure 5 is a view of the second, lower, half-shell of the switch-disconnector offigure 4 , with the lower bushing disassembled from the half-shell itself; -
Figure 6 is a partial front view of a Medium Voltage switchgear into which a switch-disconnector according to the invention has been installed. - With reference to the above mentioned figures, the gas-insulated medium voltage switch-disconnector according to the invention, designated with the reference number 1, comprises a gas-
tight housing 2 which contains an insulating gas. Insulating gases, such as SF6, are well-known and generally used in the art and will not further described here. The switch-disconnector also comprises, for each phase, a moving contact, a fixed contact and an earthing contact (not shown in the attached figures) which are positioned inside said housing. In the embodiments of the attached figures, a three-phase switch-disconnector is shown, having a corresponding number moving contacts, fixed contacts and earthing contacts. - An operating mechanism 3 (shown only in
figure 6 ) is generally used for moving said moving contact between open, closed and earthed positions, according to well known procedures. The housing may also include a pressure indicator, an exhaust valve or, in general, a pressure relief system for any gas overpressure, as well as one or more inspection windows for visual check of the contacts position. - As clearly shown in the figures, the gas-
tight housing 2 comprises a first, upper, half-shell 21 and a second, lower,half shell 22, which are coupled to each other in a gas-tight manner. In the switch-disconnector of the invention one of twohalf shells - The upper half-
shell 21 and thelower half shell 22, advantageously comprise a flanged-portion, respectively 210 and 220, for the mutual interface between them. Said flangedportions shells half shells - Preferably, for each phase, the switch-disconnector comprises a
first bushing 41 associated with said first, upper, half-shell 21 and asecond bushing 42 associated with said second, lower, half-shell 22. - According to a preferred embodiment, the first, upper, half-
shell 21 is made of polymeric material and the second, lower, half-shell 22 is made of metal material. In this way, due to the earthed metal segregation provided for by the lower half-shell made of metal, it is possible to access the lower compartment even if the busbars are under voltage. - As for the material, the polymeric material used for one of the two half-shells can be an epoxy resin; other kinds of polymeric materials can obviously be used, according to the needs. The metal material used for the other of the two half-shells can be steel, for example stainless steel or pre-galvanized steel.
- With reference to
figures 2 and3 , in a particularly preferred embodiment of the switch-disconnector 1 according to the invention, the half-shell made of polymeric material comprises, for each phase, an integral-made bushing, i.e. the half-shell 21 and the threebushings 41 are made in a single piece. As shown in the above-mentioned figures, in this way it is possible to have a very compact structure of thehalf shell 21, maintaining at the same time the requirements of electrical distance with respect to the busbar. - Conversely, as shown in
figures 4 and5 , the switch-disconnector 1 of the invention, comprises, for each phase, abushing 42 assembled with said half-shell 22 made of metal material, i.e. threebushing 42 for the three-phase switch-disconnector of the attached figures. In such a case, holes are provided in the bottom part of the lower half-shell, allowing free passage of the contact terminals, and the bushing is assembled to the half-shell 22 so as to keep gas-tight conditions. Advantageously, the bushing may comprise, integrated in their structure, a voltage indicator. - According to a preferred embodiment, the
first bushings 41 support the fixed contact (not shown) positioned inside thehousing 2, while thesecond bushings 42 support the moving contact (not shown) also positioned inside thehousing 2. For example, the moving contact can be a blade pivotally supported by theterminal 420 of thebushing 42, said blade being capable to move between a close position, in which it is engaged with the corresponding fixed contact, an earthed position in which it is engaged with a corresponding earthing contact, and an open position, in which it not engaged with said fixed or earthing contacts. - A driving shaft (not shown) is normally provided and connects the three moving contacts to the
operating mechanism 3 which, as shown infigure 6 , is positioned externally to thehousing 2. - Preferably, said half-
shell 22 made of metal material is earthed. In such a case, the earthing contact (not shown) is connected to said half-shell 22 made of metal material. - With reference to
figure 6 , the present invention, according to a second aspect, also relates to amedium voltage switchgear 10, said switchgear comprising a switch-disconnector 1 according to what defined above. - Preferably, the
medium voltage switchgear 10 according to the invention comprises acasing 101 which defines defining an internal space. The switch-disconnector 1 is generally positioned inside saidcasing 101 so as to divide said internal space in a first, upper,compartment 110 and a second, lower,compartment 120. Theoperating mechanism 3, for moving the moving contacts of the switch-disconnector between open, closed and earthed positions, is normally positioned outside thecasing 101 and is connected to said moving contact through a driving shaft. Theupper compartment 110 can be for instance the busbar compartment, while thelower compartment 120 can be the feeder, or cable, compartment. - Being that one of the two half shells, e.g. the lower half-
shell 22, is made of metal material, the switch-disconnector 1 provides a metal-earthed segregation between said first, upper,compartment 110 and said second, lower,compartment 120. At the same time, as shown infigure 6 , the extremely compact structure of thefirst half shell 21 made of insulating polymeric material, e.g. epoxy resin, allows reducing the electrical distance with respect to the busbar, thereby minimizing the occupied volume inside the casing itself. - The switch-disconnector thus conceived may undergo numerous modifications and come in several variants, all coming within the scope of the invention as defined by the claims. Moreover, all the component parts described herein may be substituted by other, technically equivalent elements. In practice, the component materials and dimensions of the device may be of any nature, according to need and the state of the art.
Claims (9)
- A Medium Voltage gas-insulated switch-disconnector (1):- a gas-tight housing (2) containing an insulating gas;- for each phase, a moving contact, a fixed contact and an earthing contact positioned inside said housing;- an operating mechanism (3) for moving said moving contact between open, closed and earthed positions;said gas-tight housing (2) comprising a first, upper, half-shell (21) and a second, lower, half shell (22) coupled in a gas-tight manner, one of said first and second half shells (21, 22) being made of metal material, the other being made of polymeric material,
characterised in that said half-shell made of metal material is earthed, said switch-disconnector (1) comprising, for each phase, a first bushing (41) associated with said first, upper, half-shell (21) and a second bushing (42) associated with said second, lower, half-shell (22), said first bushing supporting said fixed contact and said second bushing supporting said moving contact. - The switch-disconnector (1) of claim 1, characterized in that said first, upper, half-shell (21) is made of polymeric material and said second, lower, half-shell (22) is made of metal material.
- The switch-disconnector (1) according to one or more of the preceding claims, characterized in that said polymeric material is an epoxy resin and said metal material is steel.
- The switch-disconnector (1) according to one or more of the preceding claims, characterized in that said half-shell made of polymeric material comprises, for each phase, an integral-made bushing.
- The switch-disconnector (1) according to one or more of the preceding claims, characterized in that it comprises, for each phase, a bushing assembled with said half-shell made of metal material.
- The switch-disconnector (1) according to claim 1, characterized in that said earthing contact is connected to said half-shell made of metal material.
- A Medium Voltage switchgear (10), characterized in that it comprises a switch-disconnector (1) according to any of claims 1-6.
- The Medium Voltage switchgear (10) according to claim 7, characterized in that it comprises a casing (101) defining an internal space, said switch-disconnector (1) being positioned inside said casing (101) and dividing said internal space in a first, upper, compartment (110) and a second, lower, compartment (120).
- The Medium Voltage switchgear (10) according to claim 10, characterized in that said switch-disconnector (1) provides a metal-earthed segregation between said first, upper, compartment (110) and said second, lower, compartment (120).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06125177.3A EP1928065B1 (en) | 2006-11-30 | 2006-11-30 | Medium voltage gas-insulated switch-disconnector |
ES06125177.3T ES2630405T3 (en) | 2006-11-30 | 2006-11-30 | Gas insulated medium voltage disconnect switch |
CNU2007203051373U CN201163710Y (en) | 2006-11-30 | 2007-11-27 | Medium pressure gas insulation load switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06125177.3A EP1928065B1 (en) | 2006-11-30 | 2006-11-30 | Medium voltage gas-insulated switch-disconnector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1928065A1 EP1928065A1 (en) | 2008-06-04 |
EP1928065B1 true EP1928065B1 (en) | 2017-01-04 |
Family
ID=37907156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06125177.3A Active EP1928065B1 (en) | 2006-11-30 | 2006-11-30 | Medium voltage gas-insulated switch-disconnector |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1928065B1 (en) |
CN (1) | CN201163710Y (en) |
ES (1) | ES2630405T3 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008063683A1 (en) * | 2008-12-19 | 2010-07-08 | Abb Technology Ag | Gas-insulated switch |
CN101504895A (en) * | 2009-01-16 | 2009-08-12 | 北京维益埃电气有限公司 | Novel air pressing type load switching unit |
ITMI20090140U1 (en) | 2009-04-29 | 2010-10-30 | Abb Technology Ag | MEDIUM VOLTAGE ISOLATED IN GAS. |
BRPI1011772A2 (en) * | 2010-01-18 | 2018-03-13 | Abb Technology Ag | encapsulation module with isolating switches for a switch assembly. |
JP5740687B2 (en) * | 2011-01-18 | 2015-06-24 | 株式会社ダイヘン | Ground-mounted transformer device |
EP2645378B1 (en) * | 2012-03-26 | 2014-10-08 | ABB Technology AG | Electric device with insulators |
EP2645395B1 (en) | 2012-03-26 | 2014-11-12 | ABB Technology AG | An electric switching device and related electric apparatus |
UA25985S (en) | 2012-07-31 | 2013-12-10 | Абб Текнолоджі А | INSULATING COVER FOR SWITCHING DEVICE |
CN103236655B (en) * | 2013-03-01 | 2016-05-18 | 无锡飞世龙机电有限公司 | A kind of ring main unit major loop |
EP2989703B1 (en) | 2013-06-18 | 2017-03-22 | Siemens Aktiengesellschaft | Gasinsulated medium voltage switchgear |
CN105593948B (en) * | 2013-10-07 | 2019-07-19 | Abb瑞士股份有限公司 | It generates, distribute and/or using the device of electric energy and the component for this device |
CN104779090A (en) * | 2015-05-08 | 2015-07-15 | 国网上海市电力公司 | Bypass load switch |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2259459A1 (en) * | 1974-01-24 | 1975-08-22 | Distrelec Sarl | Single enclosure high voltage switching set - has insulating male connectors for cables and removable connections |
DE3513264A1 (en) * | 1985-03-12 | 1986-09-18 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Gas-blast circuit breaker |
FR2628258A1 (en) * | 1988-03-07 | 1989-09-08 | Merlin Gerin | Gas filled medium-voltage switch with composite envelope - metal centre section supports operating shaft and moving contacts and is capped by insulating sections carrying fixed elements |
FR2668851B1 (en) * | 1990-11-06 | 1994-10-07 | Merlin Gerin | MULTIPOLAR ROTARY SWITCH. |
IT1309626B1 (en) * | 1999-11-03 | 2002-01-30 | Vei Electric Systems Spa | SECTIONING AND INTERRUPTION DEVICE, FOR ELECTRICAL CABINETS. |
-
2006
- 2006-11-30 EP EP06125177.3A patent/EP1928065B1/en active Active
- 2006-11-30 ES ES06125177.3T patent/ES2630405T3/en active Active
-
2007
- 2007-11-27 CN CNU2007203051373U patent/CN201163710Y/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP1928065A1 (en) | 2008-06-04 |
ES2630405T3 (en) | 2017-08-21 |
CN201163710Y (en) | 2008-12-10 |
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