EP1120803A1 - Vakuumröhre für Leistungsschalter, mit schnappmontiertem Führungslager - Google Patents

Vakuumröhre für Leistungsschalter, mit schnappmontiertem Führungslager Download PDF

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Publication number
EP1120803A1
EP1120803A1 EP01400156A EP01400156A EP1120803A1 EP 1120803 A1 EP1120803 A1 EP 1120803A1 EP 01400156 A EP01400156 A EP 01400156A EP 01400156 A EP01400156 A EP 01400156A EP 1120803 A1 EP1120803 A1 EP 1120803A1
Authority
EP
European Patent Office
Prior art keywords
bushing
cover
tubular
flange
vacuum interrupter
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.)
Granted
Application number
EP01400156A
Other languages
English (en)
French (fr)
Other versions
EP1120803B2 (de
EP1120803B1 (de
Inventor
Edgar Spranz
Martin Schlaug
Said Attak
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.)
Grid Solutions SAS
Original Assignee
Alstom 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8846270&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1120803(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alstom SA filed Critical Alstom SA
Priority to DE60124601T priority Critical patent/DE60124601T3/de
Publication of EP1120803A1 publication Critical patent/EP1120803A1/de
Application granted granted Critical
Publication of EP1120803B1 publication Critical patent/EP1120803B1/de
Publication of EP1120803B2 publication Critical patent/EP1120803B2/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
    • 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
    • H01H2033/66246—Details relating to the guiding of the contact rod in vacuum switch belows
    • 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
    • H01H2033/66253—Details relating to the prevention of unwanted rotation of the contact rod in vacuum switch bellows

Definitions

  • the invention relates to a vacuum interrupter for a circuit breaker, having a metal end flange which is tightly crossed by a rod movable in axial translation.
  • the rod carries at one end a movable contact in the bulb, and is guided in translation by a guide bearing mounted on the metallic flange.
  • a vacuum interrupter is known from document FR-2683940, and is more particularly intended for a medium-voltage circuit breaker.
  • the sealed sliding of the rod through the flange bearing the bearing is obtained by means of a waterproof metal bellows arranged inside the bulb. This bellows has at one end a flange welded to the rod, the other end being welded to the flange by brazing.
  • the rod translation guide bearing is partly made by a plastic bushing which is immobilized in a complementary piece brazed to the flange of the vacuum interrupter.
  • a plastic bushing which is immobilized in a complementary piece brazed to the flange of the vacuum interrupter.
  • Mean for blocking the rotation of the rod are provided at the surface of the contact between the rod and the bushing, consisting for example of a groove longitudinal formed in the bore of the crossing and completed by a longitudinal rib formed on the rod.
  • the bushing is fixed on the part generally complementary by means of a plywood welded by point or screwed on this piece, or by crimping the piece.
  • the rod is guided by a tubular plastic bushing which is fixed to the flange of the vacuum interrupter by latching means consisting in particular of circular grooves made in the crossing, circular lips elastic being fixed on the flange and arranged to be inserted in the grooves.
  • latching means consisting in particular of circular grooves made in the crossing, circular lips elastic being fixed on the flange and arranged to be inserted in the grooves.
  • the assembly provides longitudinal maintenance of the crossing to avoid that it does not dislodge during the translation of the rod during a maneuver of the circuit breaker.
  • this construction can have drawbacks especially in terms of reliability. Indeed, even if they provide a certain longitudinal support, the latching means do not seem arranged to be able to withstand significant extraction forces.
  • latching means are not arranged to provide retention in crossing rotation. Furthermore, it is not intended that the rod be blocked in rotation in the crossing.
  • the object of the invention is to propose a new embodiment of a bulb vacuum for circuit breaker, with a guide bearing comprising a bushing in plastic material immobilized in an additional room by means which do not have the drawbacks indicated above.
  • the subject of the invention is a vacuum interrupter for circuit breaker, having a metal end flange which is crossed in leaktight manner by a rod movable in axial translation, said flange carrying a guide bearing in translation of the rod.
  • a vacuum interrupter for circuit breaker having a metal end flange which is crossed in leaktight manner by a rod movable in axial translation, said flange carrying a guide bearing in translation of the rod.
  • said means snap-fasteners include elastic tabs disposed on the outer periphery of said bushing to enter recesses or slots disposed on the inner tubular periphery of said cover, in that each elastic tab can brace against an edge of a lumen once the bushing is snapped into the cover so as to resist any effort extraction of the bushing, in that means are arranged to prevent the rotation of said rod in the bushing, and in that the cover has on its inner periphery bosses intended to be inserted in recesses of complementary shape
  • the metal cover is fixed attached against the flange on the outside of the ampoule and has lights accessible to trigger means intended to be inserted in said slots for pressing on the elastic tabs of the tubular bushing, so that said bushing can be removed for recycling.
  • the tubular crossing has a first tubular part surrounded by a second coaxial tubular part of shorter length, these two parts tubulars being integrally connected by a third coaxial tubular part shorter than the second tubular part, so as to provide a annular space between said first and second tubular parts.
  • Figure 1 is a schematic representation in longitudinal section a vacuum interrupter from a medium voltage circuit breaker.
  • Figure 2 is a perspective view of the bearing cover of the bulb to vacuum according to the invention.
  • Figure 3 is a perspective view of a preferred embodiment of the crossing the bearing of the vacuum interrupter according to the invention.
  • FIG. 4 is a schematic representation in longitudinal section and projection of the vacuum bulb bearing consisting of the elements shown in Figures 2 and 3, once this bearing installed on the bulb.
  • Figure 5 is a schematic perspective representation of another embodiment of crossing the bearing of the vacuum interrupter according to the invention.
  • the vacuum interrupter 1 of a circuit breaker comprises an insulating tubular casing 2, for example made of ceramic, which extends in the axial direction A and two metal end plates or flanges 3, 4.
  • the casing 2 is generally of cylindrical shape, in which case at least the flange 4 is a disc having a coaxial circular orifice.
  • the flange 3 is fixed a fixed rod not shown carrying a fixed contact.
  • the vacuum interrupter 1 has a movable contact 5 ′ carried by a metal rod 5 which slides in leaktight fashion through the orifice 11 of the flange 4 by means of a metal bellows 7 mounted inside the envelope 2.
  • the rod 5 is guided in translation in the axial direction A by a bearing 8 constituted by a tubular metal cover 9 and by a tubular passage 10 of insulating material which is intended to be inserted coaxially in the cover 9 and snapped into it.
  • a bearing 8 constituted by a tubular metal cover 9 and by a tubular passage 10 of insulating material which is intended to be inserted coaxially in the cover 9 and snapped into it.
  • the two elements 9 and 10 of the bearing are shown only in axial half-section.
  • the cover 9 as well as the bellows 7 are welded by furnace brazing to the flange 4 coaxially with the rod 5.
  • the bushing 10 is fitted into the rod 5 and snapped into the hood 9 by crossing the orifice of the flange 4.
  • the rod 5 can then slide inside the bushing 10 so as to move the movable contact 5 'in axial translation during an operation of the circuit breaker.
  • FIG. 2 shows in more detail the tubular metal cover 9.
  • This is made for example from a stamped sheet of small thickness and has one end forming an inner flange 9A.
  • the surface outside of this flange 9A is welded by furnace brazing on the flange 4 of the vacuum interrupter.
  • the cover 9 has on its inner cylindrical periphery in the vicinity of its other end, recesses in the form here of radial lights 9B, preferably distributed equidistantly and bosses 9C distributed between the lights 9B.
  • 9B lights can be made by punching, and the bosses 9C can be made by pushing back towards the inside of the hood.
  • 9B lights can also be replaced by grooves.
  • FIG. 3 shows in more detail the tubular insulating bushing 10.
  • This is preferably made of an injected plastic. It comprises a first cylindrical tubular part 10A whose outside diameter is adjusted with the inside diameter of the cover 9 and which is intended to be inserted coaxially inside the metal cover 9, as well as a second cylindrical tubular part 10B coaxial to part 10A, of smaller diameter and greater length. These two tubular parts are connected together by a third tubular part 10J in an area forming the base of the crossing. This tubular part 10J is shorter longitudinally than the first tubular part 10A, so as to provide an annular space 10L between the first and second parts.
  • Part 10B is intended to be inserted coaxially in the orifice 9D delimited by the flange 9A of the cover and in the orifice 11 formed in the flange 4 of the vacuum interrupter.
  • the shoulder 10C between the tubular parts 10A and 10B formed by the end of the cylindrical part 10A is intended to come to bear on the inner surface of the flange 9A of the cover 9 when the bushing is inserted in the cover.
  • the tubular part 10A has elastic tabs 10D on its cylindrical outer periphery, preferably distributed equidistantly.
  • Each tongue extends axially in alignment with the openings 9B of the cover and carries at its free end a lip which projects radially and which is intended to snap into a light 9B of the cover 9 when the bushing 10 is inserted coaxially in the cover 9.
  • This snap-fitting of the tabs 10D into the slots 9B thus ensures immobilization in the axial direction A of the passage 10 in the cover 9.
  • the snap-fitting of the tabs 10D into the slots 9B can be carried out without mechanical force on the cover 9 thanks to a chamfering of the lip of the tongues.
  • the bracing of the tabs makes it possible to withstand the significant extraction forces which can occur in extreme cases of operation of the circuit breaker comprising a vacuum interrupter according to the invention.
  • the bushing 10 it is essential in the invention that the bushing 10 be blocked in rotation relative to the flange 4 and therefore relative to the cover 9.
  • the tabs 10D alone do not allow them to resist a significant torque which would be exerted on the bushing 10 by the rod 5.
  • the tubular part 10A also has on its cylindrical outer periphery recesses 10 E which are distributed between the tongues 10D in alignment with the bosses 9C of the cover, so that the bosses 9C come to be embedded in the recesses 10 E when the bushing 10 is inserted in the cover 9.
  • the bosses 9C and the recesses 10 E are adjusted to prevent any possibility of relative rotation relative to the axis A of the bushing 10 in the cover 9, so as not to damage the metal bellows 7.
  • the tubular parts 10A and 10B of the bushing preferably form a single piece molded and the tubular part 10B has an internal bore 10F in which slides the rod 5.
  • the bore 10F has one or two flats 10G consisting of a wide longitudinal groove , with another deeper longitudinal groove 10H which serves as a ventilation channel as is already known. Or the flats 10G serve to prevent rotation of the rod 5 in the crossing.
  • Figure 4 are shown schematically in longitudinal section a flange 4 onto which a bearing is welded in a vacuum interrupter according to the invention.
  • the crossing 10 of the bearing is shown in partial projection.
  • the metal sealing bellows 7 has one end which ends in a tubular part which passes through the orifice 11 formed in the flange 4 as well as the opening of the cover 9 of the bearing.
  • the cover 9 and the bellows 7 are welded to the flange 4 by brazing in the oven, preferably in a single pass after the last vacuum brazing operation in the oven. Furthermore, during this single pass, the bellows 7 is advantageously welded to the inner edge of the orifice of the cover 9.
  • the end bellows 7 is inserted into the opening in the cover 9 to protrude below the inner flange of said cover. This makes it possible to visually verify that the bellows is well inserted in the orifice 11 of the flange 4, after the last brazing operation in the oven.
  • the annular space 10L of the crossing 10 is arranged so that the end of the bellows 7 can be housed in said space without pressing against the crossing 10 after the snap-fastening thereof.
  • Figure 5 is shown schematically in perspective another embodiment of the vacuum bulb bearing according to the invention, in view exploded with the end of the bulb on which this bearing is to be mounted.
  • Alone part of the rod 5 is shown, surrounded by the bellows 7.
  • the cover 9 of the landing is identical to that shown in Figure 2, while the crossing insulating tubular 10 differs somewhat in its shape from that shown in the Figure 3.
  • the first tubular part 10B of the crossing 10 is here joined against the second tubular part 10A coaxial and of shorter length.
  • the two parts 10A and 10B form preferably a single piece from molding, but the bushing 10 here presents a massive form.
  • the bearing in a vacuum interrupter according to the invention helps to reduce the time of mounting of the vacuum interrupter and therefore of a vacuum interrupter. This snap-in also avoids significant mechanical stresses on the bulb when mounting the insulating bushing, as well as when mounting of the device for operating the rod of the movable contact of the bulb.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Insulating Bodies (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP01400156A 2000-01-25 2001-01-19 Vakuumröhre für Leistungsschalter, mit schnappmontiertem Führungslager Expired - Lifetime EP1120803B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60124601T DE60124601T3 (de) 2000-01-25 2001-01-19 Vakuumröhre für Leistungsschalter, mit schnappmontiertem Führungslager

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0000907A FR2804241B1 (fr) 2000-01-25 2000-01-25 Ampoule a vide pour disjoncteur ayant un palier monte par encliquetage
FR0000907 2000-01-25

Publications (3)

Publication Number Publication Date
EP1120803A1 true EP1120803A1 (de) 2001-08-01
EP1120803B1 EP1120803B1 (de) 2006-11-22
EP1120803B2 EP1120803B2 (de) 2012-07-11

Family

ID=8846270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400156A Expired - Lifetime EP1120803B2 (de) 2000-01-25 2001-01-19 Vakuumröhre für Leistungsschalter, mit schnappmontiertem Führungslager

Country Status (4)

Country Link
EP (1) EP1120803B2 (de)
AT (1) ATE346371T1 (de)
DE (1) DE60124601T3 (de)
FR (1) FR2804241B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443537A1 (de) * 2003-01-31 2004-08-04 Siemens Aktiengesellschaft Anordnung mit einer Vakuumschaltröhre
CN105914097A (zh) * 2015-02-23 2016-08-31 Ls产电株式会社 真空断续器
JP2017016988A (ja) * 2015-07-07 2017-01-19 三菱電機株式会社 真空バルブ及びこれを用いた真空遮断器
CN108447727A (zh) * 2018-05-10 2018-08-24 厦门宏发电力电器有限公司 一种真空灭弧室
EP4421838A1 (de) * 2023-02-27 2024-08-28 Abb Schweiz Ag Vakuumschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3037709B1 (fr) * 2015-06-22 2018-05-11 Schneider Electric Industries Sas Ampoule a vide et appareillage de protection electrique comportant une telle ampoule

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2440827A1 (de) * 1974-08-26 1976-03-11 Siemens Ag Vakuumschaltrohr
FR2683940A1 (fr) * 1991-11-20 1993-05-21 Alsthom Gec Disjoncteur a moyenne tension pour l'interieur ou l'exterieur.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629204C2 (de) † 1996-07-19 2003-03-13 Abb Patent Gmbh Vakuumschaltkammer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2440827A1 (de) * 1974-08-26 1976-03-11 Siemens Ag Vakuumschaltrohr
FR2683940A1 (fr) * 1991-11-20 1993-05-21 Alsthom Gec Disjoncteur a moyenne tension pour l'interieur ou l'exterieur.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443537A1 (de) * 2003-01-31 2004-08-04 Siemens Aktiengesellschaft Anordnung mit einer Vakuumschaltröhre
CN105914097A (zh) * 2015-02-23 2016-08-31 Ls产电株式会社 真空断续器
US9552946B2 (en) 2015-02-23 2017-01-24 Lsis Co., Ltd. Vacuum interrupter
CN105914097B (zh) * 2015-02-23 2018-02-06 Ls产电株式会社 真空断续器
JP2017016988A (ja) * 2015-07-07 2017-01-19 三菱電機株式会社 真空バルブ及びこれを用いた真空遮断器
CN108447727A (zh) * 2018-05-10 2018-08-24 厦门宏发电力电器有限公司 一种真空灭弧室
EP4421838A1 (de) * 2023-02-27 2024-08-28 Abb Schweiz Ag Vakuumschalter

Also Published As

Publication number Publication date
DE60124601T3 (de) 2012-10-25
DE60124601D1 (de) 2007-01-04
DE60124601T2 (de) 2007-09-13
EP1120803B2 (de) 2012-07-11
FR2804241B1 (fr) 2002-06-21
ATE346371T1 (de) 2006-12-15
FR2804241A1 (fr) 2001-07-27
EP1120803B1 (de) 2006-11-22

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