EP1124242B1 - Vakuumschalter und vakuumschaltanlage - Google Patents

Vakuumschalter und vakuumschaltanlage Download PDF

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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
Application number
EP99929833A
Other languages
English (en)
French (fr)
Other versions
EP1124242A1 (de
EP1124242A4 (de
Inventor
Katsunori Kokubu Works Hitachi Ltd. KOJIMA
Toru Kokubu Works Hitachi Ltd. TANIMIZU
Takuya Kokubu Works Hitachi Ltd. MIYO
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP1124242A1 publication Critical patent/EP1124242A1/de
Publication of EP1124242A4 publication Critical patent/EP1124242A4/de
Application granted granted Critical
Publication of EP1124242B1 publication Critical patent/EP1124242B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

Claims (5)

  1. Vakuumschalter mit einer Vakuumkammer, die folgendes aufweist:
    einen Metallbehälter (3);
    einen festen Isolator (2a) zur Isolierung zwischen dem Metallbehälter (3) und einer festen Elektrode (6), die gasdicht innerhalb der Vakuumkammer eingeschlossen und mit einer elektrischen Starkstromleitung verbunden ist, und
    einen festen Isolator (2b) zur Isolierung zwischen dem Metallbehälter (3) und einer beweglichen Elektrode (7), die innerhalb der Vakuumkammer gasdicht eingeschlossen ist und mittels eines Betätigungsmechanismus in Kontakt mit der festen Elektrode (6) gebracht oder von ihr getrennt werden kann,
       dadurch gekennzeichnet, daß
       die Vakuumkammer geerdet ist, und
       der Metallbehälter (3) mit einer Isolierung (4) beschichtet ist, auf deren äußerer Oberfläche eine Erdungsschicht (5) ausgebildet ist.
  2. Vakuumschalter nach Anspruch 1, wobei
       die Erduhgsschicht durch Platieren der äußeren Oberfläche der Isolierung mit einem leitfähigen Material oder durch Aufbringen oder Anhaften des leitfähigen Materials auf der äußeren Oberfläche der Isolierung ausgebildet ist.
  3. Vakuumschalter nach Anspruch 1 oder 2, wobei eine Atmosphärenseite des festen Isolators eine glatt krummlinige Oberfläche oder eine teilweise oder insgesamt faltige Oberfläche aufweist.
  4. Vakuumschaltanlage mit mehreren Vakuumschaltern nach einem der Ansprüche 1 bis 3, deren Phasen aneinander angrenzend angeordnet sind.
  5. Vakuumschaltanordnung mit mehreren Vakuumschaltern nach einem der Ansprüche 1 bis 3, deren Phasen jeweils neben einem Betätiger angeordnet sind.
EP99929833A 1998-10-20 1999-07-14 Vakuumschalter und vakuumschaltanlage Expired - Lifetime EP1124242B1 (de)

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 (de) 2001-08-16
EP1124242A4 EP1124242A4 (de) 2002-07-17
EP1124242B1 true EP1124242B1 (de) 2004-06-16

Family

ID=17851516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99929833A Expired - Lifetime EP1124242B1 (de) 1998-10-20 1999-07-14 Vakuumschalter und vakuumschaltanlage

Country Status (5)

Country Link
EP (1) EP1124242B1 (de)
JP (1) JP4276787B2 (de)
CN (1) CN1155035C (de)
DE (1) DE69918156T2 (de)
WO (1) WO2000024016A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4537569B2 (ja) * 2000-04-24 2010-09-01 三菱電機株式会社 真空絶縁スイッチギヤ及びその製造方法
EP2071687A1 (de) * 2007-12-10 2009-06-17 ABB Technology AG Mittelspannungs- oder Hochspannungs-Schaltgetriebebaugruppe
US20140374383A1 (en) * 2013-06-25 2014-12-25 Tetsu Shioiri Tank-type vacuum circuit breaker
WO2016039250A1 (ja) * 2014-09-09 2016-03-17 三菱電機株式会社 真空遮断器
DE102016214752A1 (de) 2016-08-09 2018-02-15 Siemens Aktiengesellschaft Verfahren zur Herstellung eines keramischen Isolators
CN114203475B (zh) * 2021-12-03 2024-06-28 北京中车赛德铁道电气科技有限公司 一种带增强绝缘的动静触头结构的接地开关

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2152527A1 (de) * 1970-10-26 1972-04-27 Int Standard Electric Corp Vakuumschalter,der durch elastische Verformung des Gehaeuses betaetigt wird
US3823288A (en) * 1972-11-01 1974-07-09 Ite Imperial Corp Vacuum interrupter capacitance discharge and contact grounding system
JPS5053869A (de) * 1973-09-12 1975-05-13
JPS56114235A (en) * 1980-02-14 1981-09-08 Mitsubishi Electric Corp Gas insulating switching device
JPS5954135A (ja) * 1982-09-22 1984-03-28 株式会社東芝 真空バルブ
DD226690A1 (de) * 1984-09-24 1985-08-28 Buchwitz Otto Starkstrom Schalterpol

Also Published As

Publication number Publication date
WO2000024016A1 (en) 2000-04-27
CN1273684A (zh) 2000-11-15
HK1032845A1 (en) 2001-08-03
EP1124242A1 (de) 2001-08-16
DE69918156D1 (de) 2004-07-22
JP4276787B2 (ja) 2009-06-10
CN1155035C (zh) 2004-06-23
EP1124242A4 (de) 2002-07-17
DE69918156T2 (de) 2005-08-04

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