EP0236641B1 - Sectionneur d'isolement d'une installation blindée haute tension - Google Patents

Sectionneur d'isolement d'une installation blindée haute tension Download PDF

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Publication number
EP0236641B1
EP0236641B1 EP86402681A EP86402681A EP0236641B1 EP 0236641 B1 EP0236641 B1 EP 0236641B1 EP 86402681 A EP86402681 A EP 86402681A EP 86402681 A EP86402681 A EP 86402681A EP 0236641 B1 EP0236641 B1 EP 0236641B1
Authority
EP
European Patent Office
Prior art keywords
isolating switch
electrode
contact
enclosure
switch according
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
EP86402681A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0236641A1 (fr
Inventor
Jean Kieffer
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT86402681T priority Critical patent/ATE73575T1/de
Publication of EP0236641A1 publication Critical patent/EP0236641A1/fr
Application granted granted Critical
Publication of EP0236641B1 publication Critical patent/EP0236641B1/fr
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
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • a disconnector of the type mentioned makes it possible to isolate part of the installation or a departure, in particular from an armored station, the operation of the disconnector being carried out without load.
  • Such a disconnector may have to cut capacitive or inductive currents of low power, but sufficient to draw an arc between the contacts of the disconnector.
  • Such an arc is quickly extinguished during the continued operation of the disconnector and does not lend itself to consequence when it remains confined in the contact separation zone. It has been noted that in a shielded installation with a grounded metal casing, the arc drawn between the contacts of the disconnector risks, under certain severe conditions, migrating towards the casing and causing an internal breakdown of the arc at the Earth.
  • an electric field distribution screen prevents field concentration in the vicinity of the end of the fixed arcing contact. The presence of this screen does not prevent migration from the arc to the envelope at ground potential.
  • a switch has two metal screens staggered coaxially along the cut-off interval.
  • One of the screens is electrically connected to the fixed contact, and prevents the arc from stagnating on the ends of the contacts.
  • the second screen is electrically insulated by an insulating piece allowing the arc length and the extinction time to be reduced. Since the second screen is isolated from the fixed contact, it is impossible for it to pick up an electric arc.
  • the present invention aims to allow the production of an isolation disconnector avoiding any priming towards the earthed enclosure, during an operation of the disconnector.
  • the disconnector according to the invention is characterized in that an auxiliary electrode of revolution is connected to the fixed contact, and is interposed between the isolation interval d and the metallic envelope by extending coaxially over the entire length of said interval , said electrode being arranged to sense an arc capable of migrating from said interval towards said envelope.
  • the revolution electrode is sufficiently far from the movable contact and parts at the potential of this contact, to maintain the insulation voltage.
  • the electrode of revolution is also at a sufficient distance from the grounded metal casing to avoid any breakdown between this electrode and the casing.
  • the metal casing advantageously has at the level of the electrode of revolution an enlarged section sufficient to ensure the dielectric strength of the installation.
  • the envelope may be spherical or of cylindrical shape of enlarged section, connected by frustoconical parts to the cylindrical sheaths of the installation.
  • the length of the electrode of revolution corresponds substantially to the length of separation of the contacts to avoid any path from the arc to the grounded enclosure.
  • the edges of the electrode of revolution are rounded to ensure a good distribution of the field and to limit the risks of priming.
  • the electrode is preferably in the form of a ring, for example a toroid of circular section, coaxially enveloping the contacts of the disconnector.
  • the ring of revolution is fixed to the fixed contact by arms ensuring at the same time the electrical connection, these arms tangentially connecting to the external part of the ring.
  • the arms can belong or be replaced by a full cap forming a real screen between the fixed contact and the annular electrode preventing any passage of the arc in this interval.
  • a sealed and earthed metal casing 10 is filled with a gas with high dielectric strength, in particular sulfur hexafluoride.
  • the envelope 10 has flanges 12, 14, for connection to cylindrical sheaths 16, 18, belonging to the envelope of an armored station.
  • the sheaths 16, 18 surround coaxially conductors or bars 20, 22, supported by insulators 24, interposed between the flanges 12, 14.
  • the bars 20, 22, are perpendicular, but it It is clear that the invention applies to bars aligned or extending in oblique directions.
  • the end 26 of the bar 20 inside the casing 10 carries a fixed contact 28 having contact clamps 30, arranged in the form of a tulip to coaxially surround a movable contact 32, in the form of a sliding pin.
  • the pin 32 is connected by a rod 34 to an operating mechanism 36 capable of displacing the pin 32 axially to come selectively into a closed position of engagement between the clamps 30 of fixed contact and opening of the disconnector at a distance " d "for separating the fixed contact 28.
  • the pin 32 is electrically connected by rubbing contacts 38 at the end of the bar 22 internal to the casing 10.
  • the fixed contact 28 and the movable contact 32 are each equipped with a cover 40, 42, of hemispherical shape ensuring good distribution of the field around these contacts.
  • the covers 40, 42 have an axial opening for the passage of the contact pin 32.
  • the fixed contact 28 can also have an arcing finger 44 disposed axially between the contact clamps 30 and extending to the edges of the cover 40.
  • the sliding pin 32 has, when the finger 44 exists, a combined internal recess 46 into which the finger 44 enters in the closed position of the disconnector.
  • Such a disconnector well known to specialists, makes it possible to establish or break the connection between the conductors 20, 22, by simple sliding, of the movable pin 32, actuated by the operating mechanism 36.
  • the metal casing 10 is in the form of a sphere with a section greater than that of the sheaths 16, 18, and the fixed contact assembly 28, movable contact 32, is disposed substantially in the center of this sphere.
  • An annular electrode 48 in the shape of a torus, is arranged in the diametrical plane of the sphere 10, perpendicular to the movable contact pin 32, coaxially surrounding the separation gap "d" of the fixed 28 and movable 32 contacts.
  • the electrode of revolution 48 is interposed between the metal casing 10 and the separation interval "d" which constitutes the zone of formation of an arc, during a cut of capacitive or inductive current.
  • the diameter of the torus 48 is substantially equivalent to the distance "d" of insulation between the fixed contacts 28 and movable 32 in a separate position.
  • the annular electrode 48 is fixed by arms or a cap 50 to the fixed contact 28. These arms are tangentially connected to the outer edges 52 of the torus to have a rounded shape avoiding any concentration of the electric field. Opposite ends of the arms 50 are fixed at the rear of the fixed contact 28 sheltered from the distributor cover 40. The arms 50 provide the mechanical support and the electrical connection of the annular electrode 48 to the fixed contact 28.
  • the separation distance from the annular electrode 48 to the movable contact 32 and to the distributor cover 42 is always greater than or equal to the isolation distance "d" separating the fixed contacts 28 and movable 32 in open position, so as to ensure sufficient dielectric strength.
  • the annular electrode 48 is sufficiently distant from the grounded metal casing 10, to avoid any breakdown between this electrode and the casing 10.
  • the metal casing 10 may be in the form of an ellipsoid or of a cylinder associated with frustoconical connection parts or of any other form.
  • the section of the electrode of revolution 48 can be flattened to constitute an oval or a simple cylinder if care is taken to provide the edges with a swollen portion to avoid any point capable of ensuring a concentration of the field lines. Referring to the figure, it can be seen that the internal part of the electrode of revolution 48, disposed opposite the fixed contact 28, is of little use and that it can be removed, the electrode 48 being summed up in this case to a rounded part formed by a folding of the edge of the cap 50. The specialist can easily imagine other operating forms of such an electrode of revolution 48.
  • the arrangement according to invention requires a larger volume, but this increase is largely offset by the security provided by the electrode 48 which constitutes an almost impassable barrier to the arc. In the case of an envelope of sufficient diameter, it is obviously unnecessary to increase the section of the envelope in line with the ring of revolution 48.
  • the fixing and the electrical connection of the electrode of revolution 48 can be carried out in a different manner and independently of each other, the invention of course extending to any variant remaining within the framework of equivalences.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Contacts (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Insulators (AREA)
EP86402681A 1985-12-20 1986-12-03 Sectionneur d'isolement d'une installation blindée haute tension Expired - Lifetime EP0236641B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402681T ATE73575T1 (de) 1985-12-20 1986-12-03 Trennschalter einer metallgekapselten hochspannungsanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519216 1985-12-20
FR8519216A FR2592210B1 (fr) 1985-12-20 1985-12-20 Sectionneur d'isolement d'une installation blindee haute tension

Publications (2)

Publication Number Publication Date
EP0236641A1 EP0236641A1 (fr) 1987-09-16
EP0236641B1 true EP0236641B1 (fr) 1992-03-11

Family

ID=9326187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402681A Expired - Lifetime EP0236641B1 (fr) 1985-12-20 1986-12-03 Sectionneur d'isolement d'une installation blindée haute tension

Country Status (9)

Country Link
US (1) US4748303A (ja)
EP (1) EP0236641B1 (ja)
JP (1) JPH0775131B2 (ja)
CN (1) CN1014373B (ja)
AT (1) ATE73575T1 (ja)
CA (1) CA1279355C (ja)
DE (1) DE3684303D1 (ja)
FR (1) FR2592210B1 (ja)
IN (1) IN167847B (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719505B2 (ja) * 1988-06-02 1995-03-06 株式会社東芝 断路器
EP0712595A1 (en) * 1994-11-21 1996-05-22 Hiroko Suzuki Dome type feather quilt
CN101527431B (zh) * 2009-04-13 2010-12-29 中国西电电气股份有限公司 一种超/特高压gis用隔离装置
EP3819925A1 (en) * 2019-11-06 2021-05-12 General Electric Technology GmbH Improved insulating support assembly for a circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE412834A (ja) * 1934-12-18
FR1270584A (fr) * 1960-07-18 1961-09-01 Merlin Gerin Perfectionnements aux disjoncteurs pneumatiques ayant au moins un contact tubulaire
JPS5438572A (en) * 1977-09-02 1979-03-23 Hitachi Ltd Buffer type gas circuit breaker
JPS56116228A (en) * 1980-02-16 1981-09-11 Hitachi Ltd Gas insulating interrupter
FR2483121A1 (fr) * 1980-05-23 1981-11-27 Alsthom Atlantique Sectionneur de poste blinde a haute tension
JPS58204429A (ja) * 1982-05-24 1983-11-29 株式会社東芝 ガス絶縁開閉器
FR2558301B1 (fr) * 1984-01-17 1986-10-10 Merlin Gerin Sectionneur de poste blinde a haute tension equipe d'ecrans para-effluves perfores
DE3521945A1 (de) * 1985-06-14 1986-12-18 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer eine metallgekapselte, druckgasisolierte hochspannungsschaltanlage

Also Published As

Publication number Publication date
CN1014373B (zh) 1991-10-16
CA1279355C (en) 1991-01-22
US4748303A (en) 1988-05-31
JPH0775131B2 (ja) 1995-08-09
EP0236641A1 (fr) 1987-09-16
FR2592210B1 (fr) 1990-07-27
DE3684303D1 (de) 1992-04-16
CN86108278A (zh) 1987-07-01
ATE73575T1 (de) 1992-03-15
IN167847B (ja) 1990-12-29
JPS62160621A (ja) 1987-07-16
FR2592210A1 (fr) 1987-06-26

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