EP3968350A1 - Vakuumlampe für stromunterbrechungsgerät - Google Patents

Vakuumlampe für stromunterbrechungsgerät Download PDF

Info

Publication number
EP3968350A1
EP3968350A1 EP21189884.6A EP21189884A EP3968350A1 EP 3968350 A1 EP3968350 A1 EP 3968350A1 EP 21189884 A EP21189884 A EP 21189884A EP 3968350 A1 EP3968350 A1 EP 3968350A1
Authority
EP
European Patent Office
Prior art keywords
electrode
vacuum interrupter
bellows
electric current
contact part
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.)
Pending
Application number
EP21189884.6A
Other languages
English (en)
French (fr)
Inventor
André TRIOZON
Denis Milan
Pierre Newinger
Christophe Preve
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3968350A1 publication Critical patent/EP3968350A1/de
Pending legal-status Critical Current

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
    • H01H33/66238—Specific bellows details
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H33/025—Terminal arrangements
    • 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

Definitions

  • the present invention relates to a vacuum interrupter of a switching device and to a switching device comprising such a vacuum interrupter.
  • the invention finds particular application for switches in which the vacuum interrupter is located on a branch of the main electric current line.
  • Vacuum interrupters are known in an electric circuit which make it possible to alternately cut off or restore an electric current by moving two electrodes relatively with respect to one another.
  • the electric current must thus flow between the electrodes of the vacuum bulb, which requires conducting the electric current from the exterior of the vacuum bulb to the interior of the vacuum bulb while allowing the movement of at least one of the two electrodes.
  • the invention aims to propose a switching device comprising a vacuum interrupter that is less complex, more compact and less expensive to manufacture, making it possible to conduct an electric current satisfactorily through the vacuum interrupter.
  • the invention improves the situation.
  • the vacuum interrupter comprises an electrically conductive element adapted to conduct electric current between the exterior of the vacuum interrupter and the contact part of the second electrode when the second electrode is in the closed position, the bellows and the electrically conductive element forming two parallel electrical current passages.
  • the electrical conductor element is a wire or a braid.
  • the rod of the second electrode comprises at least one portion made of an electrically insulating material.
  • the portion of electrically insulating material of the rod of the second electrode is located outside the vacuum interrupter and/or is surrounded by the bellows.
  • the vacuum interrupter comprises a cover through which the second electrode is slidably mounted, the bellows comprising one end electrically connected to the cover and one end electrically connected to the contact part of the second electrode.
  • the bellows is made of stainless steel, copper and/or copper alloy.
  • the bellows comprises a copper coating, obtained by electrolysis, by plasma or by cold spraying.
  • the copper coating has a thickness greater than 0.05 millimeter, or even greater than 0.5 millimeter.
  • the bellows is made of stainless steel laminated with copper.
  • a switching device comprising a vacuum interrupter according to the invention, in particular for at least one of its electrical phases.
  • the terms “upper” and “lower” are used only to indicate the relative positions of elements of the vacuum interrupter as shown in the figures. However, it is understood that the vacuum interrupter can be installed in a switchgear according to any orientation.
  • FIG. 3 illustrates a schematic example of a vacuum interrupter 1 according to the invention according to one embodiment.
  • the vacuum interrupter 1 is intended to be used in a switching device for cutting off an electric current in an electric circuit, in particular medium and/or high voltage.
  • the terms “medium voltage” and “high voltage” are used in their usual sense, namely that the term “medium voltage” means a voltage which is greater than 1,000 volts in alternating current and 1,500 volts in direct current but which does not exceed 52,000 volts in alternating current and 75,000 volts in direct current, while the term “high voltage” designates a voltage which is strictly greater than 52,000 volts in alternating current and 75,000 volts in direct current.
  • breaking device is used to designate an electrical device for breaking the current, such as a contactor, a switch, a fuse switch or a recloser.
  • breaking devices using a vacuum interrupter are also possible.
  • the vacuum interrupter 1 can in particular be used in a switch as described in the document EP2182536 , in particular in which the vacuum interrupter is located on a branch of a main line of electric current.
  • the vacuum interrupter 1 comprises a substantially cylindrical casing 2 made of electrically insulating material, preferably ceramic.
  • the envelope 2 is closed off by two end covers, in particular an upper cover 3 and a lower cover 4.
  • the envelope 2 and the upper and lower covers 3, 4 delimit an internal arcing chamber in which it is possible to to empty.
  • the interrupting chamber designates the interior of the vacuum interrupter 1 while what is not located in the interrupting chamber constitutes the exterior of the vacuum interrupter 1.
  • the vacuum bottle 1 comprises a first electrode 5 and a second electrode 6 housed at least partly inside the vacuum bottle 1.
  • the first electrode 5 is fixed, in particular secured to the lower cover 4, while the second electrode 6 is movable, in particular slidably mounted in an axial direction X inside the vacuum interrupter 1 through the upper cover 3.
  • Each of the first and second electrodes 5, 6 comprises a rod 7 extending along the axial direction X towards one end 8 forming the contact part.
  • the rod 7 of the second electrode 6 is thus located both inside and outside the vacuum interrupter 1.
  • the end 8 forming the contact part can have various shapes and sizes, in particular in the form of a pad or a contact ball having a greater or lesser radius of curvature.
  • the sliding of the second electrode 6 can be driven by an actuation mechanism not shown in the figures.
  • the second electrode 6 can thus be moved between a closed position and an open position. In the figures, only the open position is shown. In the closed position, the contact part 8 of the first electrode 5 and the contact part 8 of the second electrode 6 are in contact with each other so that an electric current can pass through the vacuum interrupter 1 In the open position, the contact part 8 of the first electrode 5 and the contact part 8 of the second electrode 6 are spaced from each other so that the electric current is cut off in the bulb. empty 1.
  • the vacuum interrupter 1 also comprises a bellows 10.
  • the bellows 10 consists of a deformable tubular element.
  • the bellows 10 is arranged around, or surrounds at least a part of the rod 7 of the second electrode 6, in particular the part of the rod 7 of the second electrode 6 located inside the vacuum interrupter 1.
  • the bellows 10 thus comprises one end electrically connected to the upper cover 3 and one end electrically connected to, or close to the contact part 8 of the second electrode 6.
  • the attachment of the bellows 10 to the upper cover 3 and to the second electrode 6 is for example made by brazing.
  • the bellows 10 also called sealing bellows, is adapted to ensure the gas tightness of the vacuum interrupter vis-à-vis the outside (in particular to maintain the vacuum in the vacuum interrupter 1) , while allowing the sliding of the second electrode 6.
  • the vacuum interrupter 1 can also include a dielectric screen 11 placed around the contact parts 8 of the first and second electrodes 5, 6.
  • Other screens, not shown, can also be envisaged, such as for example a secondary screen around the bellows 10.
  • the electric current flows from an electric current inlet 12 located outside the vacuum interrupter.
  • the electric current is then conducted to the rod of the second electrode by strips or flexible electrical conductor wires 12, for example made of copper. Conductive wires allow thus to conduct the electric current while allowing the rod of the second electrode to slide in the vacuum interrupter.
  • the electric current flows from an electric current inlet 12 and is conducted to the rod of the second electrode by an electrically conductive joint 15.
  • the joint 15 thus makes it possible to conduct the electric current while allowing the rod of the second electrode to slide in the vacuum interrupter.
  • the bellows 10 is also adapted to conduct the electric current between an electric current inlet 12 located outside the vacuum interrupter 1 and the contact part 8 of the second electrode 6.
  • the bellows 10 is thus made of an electrically conductive material, for example metal, in particular stainless steel.
  • the bellows 10 may comprise a coating of another material, for example copper, obtained in particular by electrolysis, by plasma or by cold spraying (“ cold spray” in English).
  • the coating may have a thickness advantageously greater than 0.05 millimeter, or even greater than 0.5 millimeter.
  • the bellows 10 is made of stainless steel laminated with copper. Such a bellows 10 is for example produced by co-rolling.
  • bellows 10 can be envisaged to ensure satisfactory electrical conductivity, for example made of copper or a copper alloy, such as, without limitation, bronze, phosphor bronze, beryllium copper (CuBe), or bronze (CuSn8P or CuSn9P). Other alloys are also possible.
  • the electric current is conducted entirely or almost entirely by the bellows 10 to the contact part 8 of the second electrode 6, as illustrated by the arrows C (showing the flow of electric current when the second electrode is in the closed position).
  • the electric current inlet 12 is for example electrically connected to the upper cover 3 of the vacuum interrupter 1.
  • the electric current can then flow from the electric current inlet 12, via the upper cover 3, via the bellows 10, via the contact part 8 of the second electrode 6, via the first electrode 5 then via an electric current outlet 14.
  • the outlet electric current 14 is located outside the vacuum bulb 1, for example electrically connected to the first electrode 5 of the vacuum bulb 1.
  • the vacuum interrupter 1 can also comprise an additional electrical conductor element 16 adapted to conduct the electric current between the electric current inlet 12 located outside the vacuum interrupter 1 and the contact part 8 of the second electrode 6.
  • the conductive element 16 can for example be a wire or a flexible metal braid, made of copper. However, these examples are not limiting and other embodiments are possible.
  • the conductive element 16 can be arranged in the arcing chamber between the bellows 10 and the casing 2, as illustrated in [ FIG. 4 ]. According to another embodiment, the conductive element 16 can be arranged between the rod 7 of the second electrode 6 and the bellows 10, as illustrated in [ FIG. 5 ], which also makes it possible to limit the local disturbance of the electric field.
  • the conductive element 16 comprises one end electrically connected to the upper cover 3 or to the electric current supply 12.
  • the conductive element 16 also comprises one end electrically connected to, or close to the contact part 8 of the second electrode 6, in particular by brazing or welding.
  • the bellows 10 and the conductive element 16 thus form two electrical current passages between the outside of the vacuum interrupter and the contact part 8 of the second electrode 6 in parallel to each other.
  • the electric current is conducted simultaneously by the conductive element 16 and the bellows 10, as illustrated by the arrows C (showing the flow of electric current when the second electrode is in the closed position).
  • the current is conducted simultaneously by the conductive element 16 and the bellows 10
  • the electric current is distributed between them in variable proportions during its passage through the vacuum interrupter 1, depending on their resistivities. local. At least 5%, even 10%, even 20% of the electric current flows through the bellows 10.
  • the electric current can then flow from the electric current inlet 12, via the upper cover 3, then simultaneously via the bellows 10 and the conductive element 16, via the contact part 8 of the second electrode 6, via the first electrode 5 then via the electrical current outlet 14.
  • the electric current does not flow through the rod 7 of the second electrode 6 or through only a portion of the rod 7 of the second electrode 6.
  • a portion of the rod 7 can therefore be made of a relatively less expensive electrical insulating material and makes it possible to overcome the dielectric constraints linked to the use of conductive materials capable of locally influencing the electric field inside the vacuum bulb.
  • the portion made of an insulating material is advantageously surrounded by the bellows 10, and can be longer or shorter depending on the size of the bellows 10 used in the axial direction X.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP21189884.6A 2020-09-09 2021-08-05 Vakuumlampe für stromunterbrechungsgerät Pending EP3968350A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2009117A FR3113980B1 (fr) 2020-09-09 2020-09-09 Ampoule à vide pour appareil de coupure

Publications (1)

Publication Number Publication Date
EP3968350A1 true EP3968350A1 (de) 2022-03-16

Family

ID=73497960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21189884.6A Pending EP3968350A1 (de) 2020-09-09 2021-08-05 Vakuumlampe für stromunterbrechungsgerät

Country Status (3)

Country Link
EP (1) EP3968350A1 (de)
CN (1) CN114242508A (de)
FR (1) FR3113980B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050133481A1 (en) * 2003-12-08 2005-06-23 Kabushiki Kaisha Meidensha Bellows for use in vacuum capacitor
EP2182536A1 (de) 2008-10-29 2010-05-05 Areva T&D Sas Stromunterbrechungsschalter in einer Stromleitung, die eine Vakuumlampe umfasst
US20180308651A1 (en) * 2013-06-06 2018-10-25 Meidensha Corporation Sealed relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050133481A1 (en) * 2003-12-08 2005-06-23 Kabushiki Kaisha Meidensha Bellows for use in vacuum capacitor
EP2182536A1 (de) 2008-10-29 2010-05-05 Areva T&D Sas Stromunterbrechungsschalter in einer Stromleitung, die eine Vakuumlampe umfasst
US20180308651A1 (en) * 2013-06-06 2018-10-25 Meidensha Corporation Sealed relay

Also Published As

Publication number Publication date
FR3113980A1 (fr) 2022-03-11
FR3113980B1 (fr) 2023-03-24
CN114242508A (zh) 2022-03-25

Similar Documents

Publication Publication Date Title
EP1897107B1 (de) Unterdruck-birne für eine elektrische schutzvorrichtung wie etwa einen schalter oder einen unterbrecherschalter
EP2795648B1 (de) Vorrichtung zum schutz vor partikeln eines elektrischen lichtbogens
EP2085995B1 (de) Vakuumampulle für elektrisches Schneidegerät, das mindestens die Trennfunktion sicherstellt
EP3493235B1 (de) Vakuumlampe für elektrisches stromunterbrechungsgerät
FR2962252A1 (fr) Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite
EP3332414B1 (de) Mechanische abschaltvorrichtung für elektrische schaltung mit hoher oder sehr hoher spannung mit trennvorrichtung
EP2905796B1 (de) Schild für umspritzten Vakuumschalter
EP0709867A1 (de) Elektrischer Vakuumschalter
EP3968350A1 (de) Vakuumlampe für stromunterbrechungsgerät
EP1914850B2 (de) Vorrichtung zum Schutz gegen Überspannungen mit Verbindungsbereichen und Monoblock-Elektroden
EP0456025B1 (de) Hochspannungsschalter mit Hilfslichtbogen in Reihe
CH687839A5 (fr) Chambre de coupure de disjoncteur haute tension.
EP4104195B1 (de) Mechanische stromabschaltvorrichtung für hochspannungsgleichstrom mit einem kondensator in einer sekundären bahn, einrichtung und verfahren mit einer solchen vorrichtung
FR2962253A1 (fr) Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre et dimensions reduites
EP2200060B1 (de) Zelle zur Verteilung von Strom mittlerer Spannung
CN111095464B (zh) 用于在高、中和/或低压技术中切换大电流的装置和方法
EP2771897B2 (de) Lichtbogenlöschkammer mit einem rohr zur begrenzung der auswirkungen der partikelerzeugung und elektrische schaltvorrichtung mit einer solchen lichtbogenlöschkammer
EP4343808A1 (de) Nichtelektrische vorrichtung zum ersetzen eines stromsensors in einer schaltkammer eines lasttrennschalters sowie lasttrennschalter mit einer solchen nicht-elektrischen vorrichtung
FR2854983A1 (fr) Traversee de mouvement pour l'actionnement d'un appareillage de coupure en moyenne ou haute tension
EP3227897B1 (de) Elektrische tripout-vorrichtung mit einem schutzschalter und isolator
EP4006939A1 (de) Mittelspannungs-vakuumröhrenkontakt mit verbesserter lichtbogenunterbrechung und entsprechende vakuumröhre
EP2628221B1 (de) Erdungsschaltervorrichtung und hochspannungsschaltanlage mit einer solchen vorrichtung
FR3056822A1 (fr) Ampoule a vide pour appareil de connexion electrique
FR2690004A1 (fr) Contacts électriques.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220729

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

RIC1 Information provided on ipc code assigned before grant

Ipc: H01H 1/58 20060101ALI20240301BHEP

Ipc: H01H 33/02 20060101ALI20240301BHEP

Ipc: H01H 33/662 20060101AFI20240301BHEP

17Q First examination report despatched

Effective date: 20240318