EP1124242B1 - Vacuum switch and vacuum switch gear - Google Patents
Vacuum switch and vacuum switch gear Download PDFInfo
- Publication number
- EP1124242B1 EP1124242B1 EP99929833A EP99929833A EP1124242B1 EP 1124242 B1 EP1124242 B1 EP 1124242B1 EP 99929833 A EP99929833 A EP 99929833A EP 99929833 A EP99929833 A EP 99929833A EP 1124242 B1 EP1124242 B1 EP 1124242B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vacuum
- vacuum switch
- container
- metallic container
- insulation
- 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
- 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
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
-
- 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
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings
-
- 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
- H01H33/60—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
Definitions
- the present invention relates to a vacuum switch and a vacuum switchgear characterized by a grounded vacuum container which is composed of a metallic container coated with an insulation having a grounding layer on its outer surface and a solid insulator.
- an arc shield 9 for suppressing a stain along a surface of an insulator 2 is arranged inside a vacuum container of a vacuum switch 1.
- a vacuum container of a vacuum switch 1 there is a limitation in reducing the radial dimension of the vacuum switch because it is necessary to pay an attention on the electric field in the end portions of the arc shield 9.
- the metallic container 3a and a bus side conductor 14 are charged portions and are exposed to atmosphere.
- Another type of vacuum switch is described in the patent laid open publication EP 01 176 665, which is considered to represent the closest prior art.
- This vacuum switch comprises a vacuum switch chamber and a insulation housing which includes the chamber.
- the metallic container of the chamber, which includes the electrodes, is not exposed to atmosphere but to an insulating gas in the housing.
- a cavity is formed between the vacuum switch chamber and the insulation housing.
- the vacuum switches 1 are used for a vacuum switchgear, it is necessary to take it into consideration to keep sufficient insulation distances between the charged portion and phases, actuators and an enclosing cabinet, as shown in FIG. 5 and FIG. 6. Therefore, there is a limitation in that the switchgear is made small in size drastically.
- An object of the present invention is to provide a vacuum switch and a vacuum switchgear which can improve safety during maintenance and inspection work and can be made substantially small in size and substantially light in weight.
- An embodiment of the present invention provides a vacuum switchgear comprising vacuum switches and a control portion for controlling operating mechanisms, wherein each of the vacuum switches comprises a grounded vacuum container in which a metallic container and insulators are gas-tightly fixed with, for example, a ceramic, said metallic container being coated with an insulation, a grounding layer being provided on its outer surface; a fixed electrode arranged through the solid insulator; a movable electrode arranged through the solid insulator and in a positional relationship of touching to and detaching from the fixed electrode; and a moving portion connected to the operating mechanism for driving the movable electrode and to the movable electrode.
- the switch means a machine which performs making and breaking between the fixed electrode and the movable electrode.
- the switchgear means a machine which includes a control gear and contains a combination of one or more switching units, one or more units among a operating, a measurement, a protecting and an adjusting units, and inner connections in an enclosed box.
- the switchgear further comprises a group of these machines and units having accessories and supporting structures, and furthermore comprises a control portion for controlling the operating mechanism.
- a vacuum pressure is below 133 ⁇ 10 -4 Pa (10 -4 Torr), preferably below 133 ⁇ 10 -6 Pa (10 -6 Torr), and particularly it is preferable that the pressure is below 133 ⁇ 10 -8 Pa (10 -8 Torr).
- the surface shape of the solid insulators in the atmosphere side is necessary to lengthen the distance along the surface exposing to the atmosphere as long as possible.
- the shape is a smooth curvilinear surface, or a partially or fully folded surface.
- the materials for the insulator considered are insulating materials such as epoxy resin, ceramic and so on, but an insulating rubber having a high adhering property with the metallic container is preferable.
- the grounding layer provided on the outer surface of the insulator may be formed by applying, plating or adhering an electric conductive material to the surface.
- a vacuum switch in accordance with an embodiment of the present invention comprises:
- the fixed electrode is gas-tightly sealed inside the vacuum container, the fixed electrode being connected to an electric power line.
- a vacuum switchgear in accordance with the present invention comprises:
- FIG. 1 shows the basic structure of an embodiment of a vacuum switch 1 in accordance with the present invention.
- a vacuum container is composed of a metallic container 3, solid insulators 2a and 2b, an insulator 4 and a grounding layer 5.
- the metallic container 3 of the vacuum container is made of, for example, stainless steel.
- the solid insulators 2a and 2b are fixed to the upper portion and the lower portion of the metallic container 3, and a fixed electrode 6 and a movable electrode 7 are attached to the solid insulators 2a and 2b, respectively.
- the solid insulators 2a and 2b are made of alumina ceramic.
- the movable electrode 7 is supported by the solid insulator 2b through a bellows. The movable electrode 7 can be vertically moved by an operating rod.
- the fixed electrode 6 and the movable electrode 7 are gas-tightly sealed inside the vacuum container. Vacuum is one of the best insulation, and accordingly by sealing the electrodes in the grounded vacuum container, the insulation distance to the other components can be decreased.
- a highly adhesive insulation rubber is used for the insulator 4 coating the metallic container 3.
- the grounding layer 5 provided on the outer surface of the insulator 4 may be formed by applying, plating or adhering an electric conductive material to the surface.
- the metallic container 3 serves as an arc shield, there is no need to form the metallic container in a complex shape as in the conventional one and consequently the metallic container can be formed compact in the radial direction.
- FIG. 2 and FIG. 3 show the basic structure of an embodiment of a vacuum switchgear in accordance with the present invention. Because each of the vacuum switches is grounded, the vacuum switch for one phase can be arranged near the vacuum switch for the other phase and the actuator. Accordingly, the distance between the vacuum switches, the distance between the vacuum switch and the actuator and the enclosing cabinet can be narrowed, and the vacuum switchgear can be made small in size and light in weight.
- the distance between the vacuum switches, the distance between the vacuum switch and the actuator and the enclosing cabinet can be narrowed.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Gas-Insulated Switchgears (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Claims (5)
- A vacuum switch comprising a vacuum container having :a metallic container (3);a solid insulator (2a) for insulating between said metallic container (3) and a fixed electrode (6), which is gas-tightly enclosed inside said vacuum container, and is connected to an electric power line; anda solid insulator (2b) for insulating between the metallic container(3) and a movable electrode (7), which is gas-tightly enclosed inside said vacuum container and to be brought into contact with or to be separated from the fixed electrode (6) by an operating mechanism,
said vacuum container is grounded, and
the metallic container (3) is coated with an insulation (4), which has a grounding layer (5) formed on its outer surface. - The vacuum switch of claim 1, wherein
the grounding layer is formed by plating the outer surface of the insulation with a conductive material, or by applying or adhering the conductive material on the outer surface of the insulation. - The vacuum switch according to claim 1 or 2, wherein an atmospheric side of the solid insulators has a smooth curvilinear surface, or a partially or fully folded surface.
- A vacuum switchgear comprising a plurality of vacuum switches according to any one of claims 1 to 3, whose phases are adjacent to each other.
- A vacuum switchgear comprising a plurality of vacuum switches according to any one of claims 1 to 3, each phase of which is adjacent to an actuator.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29781498 | 1998-10-20 | ||
JP29781498 | 1998-10-20 | ||
PCT/JP1999/003800 WO2000024016A1 (en) | 1998-10-20 | 1999-07-14 | Vacuum switch and vacuum switch gear |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1124242A1 EP1124242A1 (en) | 2001-08-16 |
EP1124242A4 EP1124242A4 (en) | 2002-07-17 |
EP1124242B1 true EP1124242B1 (en) | 2004-06-16 |
Family
ID=17851516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99929833A Expired - Lifetime EP1124242B1 (en) | 1998-10-20 | 1999-07-14 | Vacuum switch and vacuum switch gear |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1124242B1 (en) |
JP (1) | JP4276787B2 (en) |
CN (1) | CN1155035C (en) |
DE (1) | DE69918156T2 (en) |
HK (1) | HK1032845A1 (en) |
WO (1) | WO2000024016A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4537569B2 (en) * | 2000-04-24 | 2010-09-01 | 三菱電機株式会社 | Vacuum insulated switchgear and manufacturing method thereof |
EP2071687A1 (en) * | 2007-12-10 | 2009-06-17 | ABB Technology AG | Medium-voltage or high-voltage switchgear assembly |
US20140374383A1 (en) * | 2013-06-25 | 2014-12-25 | Tetsu Shioiri | Tank-type vacuum circuit breaker |
CN106796852B (en) * | 2014-09-09 | 2020-01-14 | 三菱电机株式会社 | Vacuum circuit breaker |
DE102016214752A1 (en) * | 2016-08-09 | 2018-02-15 | Siemens Aktiengesellschaft | Process for producing a ceramic insulator |
CN114203475B (en) * | 2021-12-03 | 2024-06-28 | 北京中车赛德铁道电气科技有限公司 | Grounding switch with reinforced insulating moving and static contact structure |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2152527A1 (en) * | 1970-10-26 | 1972-04-27 | Int Standard Electric Corp | Vacuum switch that is actuated by elastic deformation of the housing |
US3823288A (en) * | 1972-11-01 | 1974-07-09 | Ite Imperial Corp | Vacuum interrupter capacitance discharge and contact grounding system |
JPS5053869A (en) * | 1973-09-12 | 1975-05-13 | ||
JPS56114235A (en) * | 1980-02-14 | 1981-09-08 | Mitsubishi Electric Corp | Gas insulating switching device |
JPS5954135A (en) * | 1982-09-22 | 1984-03-28 | 株式会社東芝 | Vacuum bulb |
DD226690A1 (en) * | 1984-09-24 | 1985-08-28 | Buchwitz Otto Starkstrom | A pole |
-
1999
- 1999-07-14 JP JP2000577678A patent/JP4276787B2/en not_active Expired - Fee Related
- 1999-07-14 CN CNB998010138A patent/CN1155035C/en not_active Expired - Fee Related
- 1999-07-14 DE DE69918156T patent/DE69918156T2/en not_active Expired - Lifetime
- 1999-07-14 EP EP99929833A patent/EP1124242B1/en not_active Expired - Lifetime
- 1999-07-14 WO PCT/JP1999/003800 patent/WO2000024016A1/en active IP Right Grant
-
2001
- 2001-05-15 HK HK01103348A patent/HK1032845A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69918156D1 (en) | 2004-07-22 |
CN1155035C (en) | 2004-06-23 |
HK1032845A1 (en) | 2001-08-03 |
DE69918156T2 (en) | 2005-08-04 |
WO2000024016A1 (en) | 2000-04-27 |
JP4276787B2 (en) | 2009-06-10 |
CN1273684A (en) | 2000-11-15 |
EP1124242A4 (en) | 2002-07-17 |
EP1124242A1 (en) | 2001-08-16 |
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