EP2085995B1 - Vakuumampulle für elektrisches Schneidegerät, das mindestens die Trennfunktion sicherstellt - Google Patents

Vakuumampulle für elektrisches Schneidegerät, das mindestens die Trennfunktion sicherstellt Download PDF

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Publication number
EP2085995B1
EP2085995B1 EP20080354090 EP08354090A EP2085995B1 EP 2085995 B1 EP2085995 B1 EP 2085995B1 EP 20080354090 EP20080354090 EP 20080354090 EP 08354090 A EP08354090 A EP 08354090A EP 2085995 B1 EP2085995 B1 EP 2085995B1
Authority
EP
European Patent Office
Prior art keywords
contact
cartridge
movable contact
vacuum
cartridge 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.)
Not-in-force
Application number
EP20080354090
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English (en)
French (fr)
Other versions
EP2085995A1 (de
Inventor
Hans Schellekens
Olivier Cardoletti
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
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2085995A1 publication Critical patent/EP2085995A1/de
Application granted granted Critical
Publication of EP2085995B1 publication Critical patent/EP2085995B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • 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
    • H01H33/60—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
    • H01H2033/6668—Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
    • 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

Definitions

  • the present invention relates to a vacuum interrupter for an electrical switching device comprising, housed in a substantially cylindrical envelope closed by two bottoms, a first substantially annular fixed contact substantially mounted in the center of the bulb radially extending inside the bulb, a second fixed contact secured to one of the bottoms of the bulb and extending substantially parallel to the axis of the bulb, and a movable contact slidably mounted through the other of the two bottoms and extending substantially parallel to the axis of the bulb, one of the fixed contacts being electrically connected to the earth of an external circuit, the other of the fixed contacts being electrically connected to the source (or initially) of said circuit and the movable contact being electrically connected to the start (or respectively to the source) of said circuit, said movable contact being movable between a position of contact with one of the fixed contacts and a contact position with the other of the fixed contacts.
  • Such a bulb generally contains three contacts respectively two fixed contacts and a movable contact. These three contacts are intended to be respectively connected to three connection points of an electrical system outside the bulb. One of these connection points realizes the earth function or the mass of the electrical system. The second of these points represents the source of the electrical system by which the current arrives. The third of these points is a starting point of the flow towards the customer.
  • the contacts of the bulb are connected to one or other of these points, the mobile contact being rarely connected to the earth function.
  • the movable contact can move between two positions, respectively a position in which the movable contact is in contact with a said one of the fixed contacts and a position in which the movable contact is in contact with the second fixed contact.
  • the movable contact can be connected to the start of the electrical system.
  • One of the fixed contacts may be connected to the earth of the electrical system and the second fixed contact connected to the source of the electrical system.
  • the functions performed in such a bulb are at least two, namely the function ensuring the continuity of service, and the function ensuring the grounding of a part of the electrical system, either the source or the start. During this grounding of the system, a sectioning is obtained between the source and the departure. These two functions are obtained by putting the moving contact in one or the other extreme position.
  • Other functions can be realized in addition to the disconnector function with the same device, for example the switch function or the disconnector function without earthing.
  • the switch function cuts the current flowing from the source to the customer.
  • the ungrounded disconnector function is used to electrically separate all contacts.
  • the patent is known DE 2037234 describing a light bulb performing the disconnector and earthing functions. The purpose of this type of bulb is to provide several functions in the same bulb in order to then realize a savings in size or cost or both.
  • the following table shows the diameter and height of the known bulbs when they perform for one in 1, the switch function, for another, in 2, the circuit breaker function, and for a third in 3, the disconnector function with the earth such as that described in the aforementioned patent, for different voltage values.
  • Light switch 50 90 60 120 75 160 2 breaker 60 120 70 120 100 180 3 isolator 82 160 92 180 122 220 with Mise à Earth
  • the present invention proposes a vacuum interrupter providing the disconnector and earthing function, having reduced dimensions, and allowing integration into the said bulb of the circuit breaker function.
  • the subject of the present invention is a vacuum interrupter for an electrical switching device of the kind mentioned above, this bulb being characterized in that the bearing surface of the moving contact on the first fixed contact is in the form of a moon. growing.
  • the first fixed contact comprises a disk having a circular opening off-center with respect to the axis of the bulb and allowing the passage of the movable contact.
  • the movable contact has a disc centered on the axis of the bulb.
  • the movable contact is in contact with the first fixed contact by a lower surface of the disc facing the opening of the bulb through which the movable contact is slidably mounted.
  • the movable contact has a recess shaped to receive a part of the aforementioned first contact, one of the surfaces defining the recess forming at least partly a bearing surface of the movable contact on the first fixed contact.
  • said recess is shaped so that said movable contact has a first portion constituting the contact disc centered on the axis of the bulb, a second cylindrical portion offset from the axis of the bulb and having a height corresponding to that of the above mentioned, and a third cylindrical portion centered with respect to the axis of the bulb.
  • said vacuum bulb having two dielectric screens mounted around the contacts, said screens being placed end to end and supporting at their ends opposite the first fixed contact, said bulb is characterized in that the two aforementioned screens have a conical shape, their diameter being larger on the side of the middle of the bulb.
  • the aforementioned screens are made of ceramic.
  • the envelope of the bulb is made by epoxy overmolding, the epoxy layer having a thickness increasing from the center to the ends of the bulb.
  • the envelope of the bulb is covered with a conductive layer electrically connected to the ground.
  • said bulb comprises means for producing a radial or axial magnetic field so as to provide the circuit breaker function
  • the surface of the first fixed contact intended to come into contact with the movable contact comprises a plurality of distinct contact points projecting.
  • these points comprise at least three points of contact forming a triangle, said points being separated by the same distance from the axis of the bulb.
  • the first fixed contact is connected to earth while the second fixed contact is connected to the source, and the movable contact is connected to the start of the external circuit.
  • This bulb A intended to provide the function sectioning and grounding in an electrical circuit.
  • This bulb A comprises in known manner a casing 1 of substantially cylindrical shape closed by two bottoms 3,4 filled with vacuum 2.
  • This envelope contains a first fixed contact 5 connected to the earth T of an external system, a second contact fixed 6 electrically connected to the source of an external system receiving a power supply, and a movable contact 7 electrically connected to the start of the electrical system and allowing the distribution of the current to the customer.
  • the continuity of service function is provided when the movable contact 15 which is connected to the start is in contact with the second fixed contact 16 which is electrically connected to the aforementioned source.
  • the earth contact T or first fixed contact is annular and cooperates with the movable contact 7 in the form of disk.
  • an annular portion 8 of the lower surface 9 of the contact disc 10 is in contact with an end also annular end portion 11 of the upper surface 12 of the earth contact T.
  • the earth contact 13 comprises a disk 14 comprising a circular passage 14a off-center with respect to the axis X of the bulb and through which the movable contact 15 passes.
  • the second fixed contact 16 is constituted by a cylindrical portion passing through the upper bottom wall 3 of the bulb A.
  • the movable contact 15 comprises a first part 17 forming a contact disc, a second part 18 having a recess 19 intended to receive the earth contact 13, and a third part 20 formed by a cylindrical part similar to that of the second fixed contact 16 and passing through the bottom wall 4 of the bulb A.
  • One 21 of the walls of the recess 19 constitutes an annular surface intended to be brought into contact with the surface 22 facing the earth contact 13.
  • the contact surface S between the two surfaces respectively of the movable contact 15 and the earth contact 13 is in the shape of an increasing moon as illustrated on the figure 3 .
  • the earth contact 13 comprises three contact pads 23,24,25 arranged in a triangle and all located at the same distance from the axis X of the bulb.
  • the table shown below is a table identical to the one already presented above but further comprising the data relating to the device according to the invention.
  • Light switch 50 90 60 120 75 160 2 breaker 60 120 70 120 100 180 3 Disconnector with Grounding 82 160 92 180 122 220 4 According to invention Figure 3 and 6 (conical) 67 140 75 140 100 180
  • the radial dimensions of a bulb according to the invention indicated on line 4 are equivalent to those of circuit breakers for the same voltage. This allows for more compact power distribution systems.
  • the reduction in the height obtained makes it possible to integrate the circuit breaker function into the bulb, as illustrated in FIG. figure 5 .
  • the bulb is equipped with RMF contacts 26,27 adapted to a radial magnetic field.
  • RMF contacts 26,27 adapted to a radial magnetic field.
  • AMF internal coil contacts adapted to the production of an axial magnetic field.
  • another embodiment of the bulb has been shown, which comprises ceramics screens 28,29 of conical shape, this to obtain a further reduction in the size of the bulb.
  • the maximum radial width of the bulb remains restricted at the earth contact, the width being reduced at both ends.
  • This embodiment is advantageous for applications using gas insulation, or in case of over molding of the bulb by means of epoxy 31 in the presence of a screen connected to the ground as illustrated in this figure 4 .
  • the conical shape of the ceramics makes it possible to achieve a better development of the electric field between the interior of the bulb and the insulation.
  • the outer surface of the bulb is covered with a conductive layer 30 which is grounded.
  • the thickness of the epoxy layer is determined by the dielectric stresses at the ends of the bulb. A significant reduction in the radial width of the casing is achieved by thereby varying this epoxy thickness.
  • the fixed contact of the medium is connected to the earth, the second contact fixed to the source and the moving contact at the start, other embodiments are possible.
  • the movable contact may be connected to the source and the first fixed contact to earth while the second fixed contact will be connected initially, or vice versa for the fixed contacts.
  • a vacuum bulb has been produced in which the maximum radial width of the bulb is reduced to the height of the earth contact.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (14)

  1. Vakuumschaltröhre (A) für ein elektrisches Schaltgerät mit einer annähernd zylindrischen, durch zwei Böden (3, 4) verschlossenen Schaltkammer (1), in der ein annähernd ringförmiger, radial und annähernd mittig im Inneren der Schaltröhre angeordneter erster feststehender Kontakt (13), ein, mit einem der Böden (3, 4) der Schaltröhre verbundener und annähernd parallel zur Achse (X) der Schaltröhre angeordneter zweiter feststehender Kontakt (16) und ein, den anderen Boden (4) gleitend durchragender sowie annähernd parallel zur Achse (X) der Schaltröhre angeordneter beweglicher Kontakt (15) angeordnet sind, wobei einer (13) der feststehenden Kontakte elektrisch mit dem Erdpotenzial eines äußeren Stromkreises, der andere feststehende Kontakt (16) elektrisch mit der Einspeisung (bzw. dem Abgang) des genannten Stromkreises und der bewegliche Kontakt (15) elektrisch mit dem Abgang (bzw. der Einspeisung) des genannten Stromkreises verbunden ist und der genannte bewegliche Kontakt (15) zwischen einer Kontaktstellung mit dem einem (13) der feststehenden Kontakte und einer Kontaktstellung mit dem anderen (16) der feststehenden Kontakte verschoben werden kann, dadurch gekennzeichnet, dass die Auflagefläche S des beweglichen Kontakts (15) auf dem ersten feststehenden Kontakt (13) die Form eines zunehmenden Mondes aufweist.
  2. Vakuumschaltröhre nach Anspruch 1, dadurch gekennzeichnet, dass der erste feststehende Kontakt (13) eine Scheibe (14) mit einer darin ausgebildeten, exzentrisch zur Achse X der Schaltröhre A angeordneten, kreisförmigen Öffnung (14a) umfasst, welche die Durchführung des beweglichen Kontakts (15) erlaubt.
  3. Vakuumschaltröhre nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der bewegliche Kontakt (15) eine konzentrisch zur Achse (X) der Schaltröhre angeordnete Scheibe (17) umfasst.
  4. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der bewegliche Kontakt (15) auf dem ersten feststehenden Kontakt (13) mit einer Unterseite (21) der Scheibe (17) aufliegt, welche Unterseite der von dem beweglichen Kontakt (15) gleitend durchragten Öffnung der Schaltröhre A zugewandt ist.
  5. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der bewegliche Kontakt (15) eine Ausnehmung (19) aufweist, die so ausgebildet ist, dass sie einen Teil des genannten ersten Kontakts (13) aufnimmt, wobei eine (21) der die Ausnehmung (19) begrenzenden Flächen mindestens teilweise eine Auflagefläche S des beweglichen Kontakts (15) auf dem ersten feststehenden Kontakt (13) bildet.
  6. Vakuumschaltröhre nach Anspruch 5, dadurch gekennzeichnet, dass die genannte Ausnehmung (19) so ausgebildet ist, dass der genannte bewegliche Kontakt (15) einen ersten Abschnitt (17), der die konzentrisch zur Achse der Schaltröhre angeordnete Kontaktscheibe bildet, einen exzentrisch zur Achse X der Schaltröhre A angeordneten zylindrischen, zweiten Abschnitt (18), dessen Höhe der Höhe der genannten Ausnehmung (19) entspricht, sowie einen konzentrisch zur Achse X der Schaltröhre A angeordneten zylindrischen dritten Abschnitt (20) umfasst.
  7. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche mit zwei, um die Kontakte herum angeordneten dielektrischen Abschirmungen (28, 29), welche Abschirmungen einander gegenüberliegend angeordnet sind und an ihren einander zugewandten Enden den ersten feststehenden Kontakt (13) tragen, dadurch gekennzeichnet, dass die beiden genannten Abschirmungen (28, 29) konisch geformt sind und ihr Durchmesser auf der dem Mittelabschnitt der Schaltröhre zugewandte Seite größer ist.
  8. Vakuumschaltröhre nach Anspruch 7, dadurch gekennzeichnet, dass die genannten Abschirmungen (28, 29) aus Keramik bestehen.
  9. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ihre Umhüllung (1) aus vergossenem Epoxydharz (31) besteht und die Dicke der Epoxydharzschicht von der Mitte zu den Enden der Schaltröhre hin zunimmt.
  10. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Umhüllung (1) der Schaltröhre A mit einer leitenden Schicht (30) überzogen ist, die elektrisch mit Erde T verbunden ist.
  11. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Mittel zur Erzeugung eines radial oder axial wirkenden Magnetfeldes umfasst, um die Leistungsschalterfunktion zu gewährleisten.
  12. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zur Kontaktgabe mit dem beweglichen Kontakt (17) dienende Fläche (22) des ersten feststehenden Kontakts (13) mehrere hervorstehende Kontaktpunkte (23, 24, 25) umfasst.
  13. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es sich bei diesen Punkten um mindestens drei Kontaktpunkte (23, 24, 25) handelt, welche ein Dreieck bilden, in dem die genannten Punkte alle im gleichen Abstand zur Achse X der Schaltröhre angeordnet sind.
  14. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste feststehende Kontakt (13) mit Erde, der zweite feststehende Kontakt (16) mit der Einspeisung und der bewegliche Kontakt (15) mit dem Abgang des äußeren Stromkreises verbunden sind.
EP20080354090 2008-01-31 2008-12-08 Vakuumampulle für elektrisches Schneidegerät, das mindestens die Trennfunktion sicherstellt Not-in-force EP2085995B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0800518A FR2927194B1 (fr) 2008-01-31 2008-01-31 Ampoule a vide pour un appareil electrique de coupure assurant au moins la fonction sectionneur

Publications (2)

Publication Number Publication Date
EP2085995A1 EP2085995A1 (de) 2009-08-05
EP2085995B1 true EP2085995B1 (de) 2013-08-21

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EP20080354090 Not-in-force EP2085995B1 (de) 2008-01-31 2008-12-08 Vakuumampulle für elektrisches Schneidegerät, das mindestens die Trennfunktion sicherstellt

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EP (1) EP2085995B1 (de)
CN (1) CN101499384B (de)
ES (1) ES2432403T3 (de)
FR (1) FR2927194B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010053466A1 (de) * 2010-11-30 2012-05-31 Maschinenfabrik Reinhausen Gmbh Stufenschalter und Vakuumschaltröhre für einen solchen Stufenschalter
WO2012136423A1 (de) * 2011-04-02 2012-10-11 Maschinenfabrik Reinhausen Gmbh Stufenschalter und vakuumschaltröhre für einen solchen stufenschalter
CN105914092A (zh) * 2013-11-27 2016-08-31 赵牧青 一种提升成品率的真空开关管
CN105762003B8 (zh) * 2013-11-27 2019-03-22 乐清市川嘉电气科技有限公司 一种提升绝缘性能的真空开关管
CN105742111B8 (zh) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 提升电场分布均匀性的真空开关管
CN105742113B8 (zh) * 2013-11-27 2019-04-19 乐清市川嘉电气科技有限公司 一种真空开关管
CN105719891B8 (zh) * 2013-11-27 2019-04-16 乐清市川嘉电气科技有限公司 提升绝缘性能的真空开关管
CN105742112B8 (zh) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 一种具有较好缓冲作用的真空开关管
EP3671794B1 (de) * 2018-12-20 2023-02-08 ABB Schweiz AG Mittelspannungsschaltpol
CN114267567B (zh) * 2022-01-24 2022-09-09 徐州贝尔电气有限公司 一种用于电气设备安全的断路器

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DE2037234A1 (de) 1970-07-01 1972-02-03 Inst Prueffled Fuer Elektrisch Schaltgerat für hohe Spannungen
US4661666A (en) * 1985-05-28 1987-04-28 Kabushiki Kaisha Meidensha Vacuum interrupter
KR100361390B1 (ko) * 1994-11-16 2003-02-19 이턴 코포레이션 진공차단기,진공차단기용접점코일조립체및원주전극코일의제조방법
KR100295905B1 (ko) * 1998-07-18 2001-08-07 이종수 진공인터럽터용전극구조체
DE10030670C2 (de) * 2000-06-23 2002-06-13 Siemens Ag Vakuumschaltröhre mit zwei Kontaktsystemen
DE10204217B4 (de) * 2002-01-29 2008-09-25 Siemens Ag Anordnung mit einer Vakuumschaltröhre
DE20321748U1 (de) * 2003-12-19 2009-05-14 Abb Technology Ag Mittelspannungsschaltanlage

Also Published As

Publication number Publication date
CN101499384A (zh) 2009-08-05
FR2927194B1 (fr) 2010-02-19
CN101499384B (zh) 2013-05-29
FR2927194A1 (fr) 2009-08-07
ES2432403T3 (es) 2013-12-03
EP2085995A1 (de) 2009-08-05

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