EP0642145B1 - Tulip type electrical contact - Google Patents

Tulip type electrical contact Download PDF

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Publication number
EP0642145B1
EP0642145B1 EP94401989A EP94401989A EP0642145B1 EP 0642145 B1 EP0642145 B1 EP 0642145B1 EP 94401989 A EP94401989 A EP 94401989A EP 94401989 A EP94401989 A EP 94401989A EP 0642145 B1 EP0642145 B1 EP 0642145B1
Authority
EP
European Patent Office
Prior art keywords
fingers
contact
tube
base
rose
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
EP94401989A
Other languages
German (de)
French (fr)
Other versions
EP0642145B2 (en
EP0642145A1 (en
Inventor
Gerhard Seyrling
Thierry Tricot
Xavier Prodan
Jean Bonnaire
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
GEC Alsthom T&D 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9450642&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0642145(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0642145A1 publication Critical patent/EP0642145A1/en
Application granted granted Critical
Publication of EP0642145B1 publication Critical patent/EP0642145B1/en
Publication of EP0642145B2 publication Critical patent/EP0642145B2/en
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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket

Definitions

  • the present invention relates to a contact electric tulip type, including a ring of fingers arranged parallel to each other along the generatrices of a cylinder and joined by a common base.
  • It relates more precisely to a type contact tulip, intended to cooperate with a cylindrical male contact and having parallel contact fingers arranged side by side according to the generators of a cylinder and provided a common base, contact including a limiter radial stroke of the fingers consisting of a coaxial tube fingers on which fingers come into position maximum radial expansion.
  • Such fingers are subject to current flow to electrodynamic forces tending to move the fingers radially. If for example due to mechanical forces and significant electrodynamics, the deformation exceeds the elastic limit of the material, the contact is deteriorated because it no longer has the necessary qualities, in particular the elasticity qualities, to ensure current flow with suitable contact resistance.
  • the invention solves this problem by proposing a particularly simple mounting arrangement which increases the contact force in the expansion position.
  • each time finger is associated with an elastic member disposed between said tube and finger and working in compression when radial expansion of the fingers.
  • the fingers comprise a rod integral with said base and a stud contact, whose distance from the longitudinal axis of the contact is less than that of the rod, and said tube is arranged inside the fingers and in position expansion, the fingers abut against the tube by through a surface formed in the studs finger contacts.
  • the contact according to the invention has the same dimensions as a contact not equipped with radial stroke limiter unlike those of the prior art where the tube or the outer ring increases the size of the contact. Now this can be prohibitive in certain applications, in particularly in the breaking chambers of circuit breakers high or medium voltage. Thanks to this improvement, the gas flow around the contact is not disturbed.
  • said elastic member is a blade with one fixing end fixed near said base and one free end of which is in abutment against fingers in rest position.
  • each pad has a notch internal housing the free ends of the tube and said blade.
  • a base comprising grooves receiving the ends of fixing of the blades, the tube blocking said blades once said base fitted on it and being itself blocked by the fingers, the base of the fingers being fixed on said base.
  • the base supports a tube of interior thermal protection.
  • Figure 1 is a partially sectional view longitudinal of the component parts of a conforming contact to the invention.
  • Figure 2 is a longitudinal sectional view of a contact according to the invention at rest.
  • Figure 3 is a longitudinal sectional view of a contact according to the invention in expansion position maximum radial.
  • the type contact tulip comprises conventionally parallel contact fingers 2, arranged side by side according to the generators of a cylinder and provided with a base common 3.
  • the fingers 2 comprises a rod 6 integral with said base 3 and a contact pad 7, the distance of which relative to the longitudinal axis 8 of the contact is less to that of the rod 6.
  • the studs 7 are provided with a notch internal 10.
  • the contact also includes a stroke limiter radial fingers consisting of a tube 4 coaxial with the fingers 2.
  • the tube 4 is intended to be disposed internally at the fingers 2, its free end being received in the notches 10 formed in the studs 7.
  • the contact finally comprises a tubular base 11 having grooves 12 arranged on its periphery and regularly distributed in correspondence available fingers 2. These grooves 12 receive the ends of fixing blades 5 of length substantially equal to that of tube 4 and made of a metal with good properties elastic. To this base 11 is also rigidly fixed an inner protection tube 13 made of a metal temperature resistant and provides protection internal thermal of the contact when an electric arc appears inside the tulip contact.
  • the tube 4 blocks the blades 5 with an internal flange 14 keeping the ends of the blades 5 in the grooves 12, once said base 11 fitted into the tube 4.
  • This assembly is then fitted into the base 3 of the fingers 2, the free ends of the tube 4 and the blades 5 which are housed in the notches 10.
  • base 3 is provided with positioning pins 15, visible on the Figures 2 and 3, coming to fit into the provided holes in the base 11.
  • the base 3 of the fingers 2 is then fixed on the base 11 by means of fixing studs 16 connected to a support part of the contact not shown.
  • fingers 2 When the tulip contact is engaged with a male contact 1, as shown in figure 3, fingers 2 assume a maximum position of radial expansion. This expansion is limited by the stop of the fingers 2 against the rigid tube 4 by their surface 9. Between this tube 4 and the surface 9 is the free end of a blade 5 for each finger 2. This blade 5 is therefore deformed and due to its elasticity it works in compression, pushing the pad 7 of each finger 2 against the external surface of the male contact 1, this thrust adding to the effort clean of fingers 2.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Saccharide Compounds (AREA)
  • Contacts (AREA)

Abstract

The present invention relates to a tulip-type contact, intended to interact with a cylindrical male contact (1) and including parallel contact fingers (2), arranged side by side along the generatrices of a cylinder and provided with a common base part (3). The contact comprises a limiter of the radio travel of the fingers, which consists of a tube (4) coaxial with the fingers (2) on which the fingers (2) abut in maximum radial expansion position, and an elastic element (5) is associated with each finger (2), this element being arranged between the said tube (4) and the finger (2) and working in compression when the fingers (2) expand. <IMAGE>

Description

La présente invention se rapporte à un contact électrique du type tulipe, comprenant une couronne de doigts disposés parallèlement entre eux selon les génératrices d'un cylindre et réunis par une base commune.The present invention relates to a contact electric tulip type, including a ring of fingers arranged parallel to each other along the generatrices of a cylinder and joined by a common base.

Elle concerne plus précisément un contact de type tulipe, destiné à coopérer avec un contact mâle cylindrique et comportant des doigts de contact parallèles, disposés côte à côte selon les génératrices d'un cylindre et pourvus d'une embase commune, contact comprenant un limiteur de course radiale des doigts constitué d'un tube coaxial aux doigts sur lequel viennent buter les doigts en position maximale d'expansion radiale.It relates more precisely to a type contact tulip, intended to cooperate with a cylindrical male contact and having parallel contact fingers arranged side by side according to the generators of a cylinder and provided a common base, contact including a limiter radial stroke of the fingers consisting of a coaxial tube fingers on which fingers come into position maximum radial expansion.

De tels doigts sont soumis lors du passage du courant à des forces électrodynamiques tendant à déplacer les doigts radialement. Si en raison par exemple d'efforts mécaniques et électrodynamiques importants, la déformation dépasse la limite élastique du matériau, le contact est détérioré, car il ne présente plus les qualités nécessaires, notamment les qualités d'élasticité, pour assurer le passage du courant avec une résistance de contact convenable.Such fingers are subject to current flow to electrodynamic forces tending to move the fingers radially. If for example due to mechanical forces and significant electrodynamics, the deformation exceeds the elastic limit of the material, the contact is deteriorated because it no longer has the necessary qualities, in particular the elasticity qualities, to ensure current flow with suitable contact resistance.

Il est connu d'empêcher la déformation de tels contacts au-delà de la limite élastique du matériau, en fixant sur la tulipe une bague ou un tube extérieurs, dits limiteur de course radiale.It is known to prevent the deformation of such contacts beyond the elastic limit of the material, in fixing on the tulip an outer ring or tube, called radial stroke limiter.

Cependant il s'avère que dans cette position d'expansion radiale maximale, en butée contre le tube, les doigts perdent de leurs qualités élastiques et l'effort de contact des doigts de la tulipe contre le contact mâle diminuant, la résistance de contact augmente et ceci est défavorable à un passage correct du courant.However it turns out that in this position maximum radial expansion, abutting the tube, the fingers lose their elastic qualities and the effort of contact of tulip fingers against male contact decreasing, the contact resistance increases and this is unfavorable to a correct current flow.

L'invention résout ce problème en proposant un agencement de montage particulièrement simple qui augmente l'effort de contact en position d'expansion.The invention solves this problem by proposing a particularly simple mounting arrangement which increases the contact force in the expansion position.

Pour ce faire conformément à l'invention, à chaque doigt est associé un organe élastique disposé entre ledit tube et le doigt et travaillant en compression lors de l'expansion radiale des doigts.To do this in accordance with the invention, each time finger is associated with an elastic member disposed between said tube and finger and working in compression when radial expansion of the fingers.

Selon un mode de réalisation préféré, les doigts comportent une tige solidaire de ladite embase et un plot de contact, dont la distance par rapport à l'axe longitudinal du contact est inférieure à celle de la tige, et ledit tube est disposé intérieurement aux doigts et en position d'expansion, les doigts viennent buter contre le tube par l'intermédiaire d'une surface ménagée dans les plots de contacts des doigts.According to a preferred embodiment, the fingers comprise a rod integral with said base and a stud contact, whose distance from the longitudinal axis of the contact is less than that of the rod, and said tube is arranged inside the fingers and in position expansion, the fingers abut against the tube by through a surface formed in the studs finger contacts.

Ce mode de réalisation présente un avantage important. En effet, grâce à cet agencement intérieur du tube, le contact conforme à l'invention a les mêmes dimensions qu'un contact non équipé de limiteur de course radiale contrairement à ceux de l'art antérieur où le tube ou la bague extérieurs augmente l'encombrement du contact. Or ceci peut être rédhibitoire dans certaines applications, en particulier dans les chambres de coupure de disjoncteurs à haute ou moyenne tension. Grâce à ce perfectionnement, l'écoulement du gaz autour du contact n'est pas perturbé.This embodiment has an important advantage. Indeed, thanks to this interior arrangement of the tube, the contact according to the invention has the same dimensions as a contact not equipped with radial stroke limiter unlike those of the prior art where the tube or the outer ring increases the size of the contact. Now this can be prohibitive in certain applications, in particularly in the breaking chambers of circuit breakers high or medium voltage. Thanks to this improvement, the gas flow around the contact is not disturbed.

Avantageusement, ledit organe élastique est une lame dont une extrémité de fixation est fixée à proximité de ladite embase et dont une extrémité libre est en butée contre les doigts en position de repos.Advantageously, said elastic member is a blade with one fixing end fixed near said base and one free end of which is in abutment against fingers in rest position.

De préférence, chaque plot comporte une encoche interne dans laquelle sont logées les extrémités libres du tube et de ladite lame.Preferably, each pad has a notch internal housing the free ends of the tube and said blade.

Selon une constitution particulière, il comporte un socle comportant des rainures recevant les extrémités de fixation des lames, le tube venant bloquer lesdites lames une fois ledit socle emboíté sur celui-ci et étant lui-même bloqué par les doigts, l'embase des doigts étant fixée sur ledit socle.According to a particular constitution, it includes a base comprising grooves receiving the ends of fixing of the blades, the tube blocking said blades once said base fitted on it and being itself blocked by the fingers, the base of the fingers being fixed on said base.

Avantageusement, le socle supporte un tube de protection thermique intérieur. Advantageously, the base supports a tube of interior thermal protection.

L'invention est exposée ci-après plus en détail à l'aide de dessins ne représentant qu'un mode de réalisation préféré de l'invention.The invention is set out below in more detail at using drawings representing only one embodiment preferred of the invention.

La figure 1 est une vue partiellement en coupe longitudinale des pièces constitutives d'un contact conforme à l'invention.Figure 1 is a partially sectional view longitudinal of the component parts of a conforming contact to the invention.

La figure 2 est une vue en coupe longitudinale d'un contact conforme à l'invention au repos.Figure 2 is a longitudinal sectional view of a contact according to the invention at rest.

La figure 3 est une vue en coupe longitudinale d'un contact conforme à l'invention en position d'expansion radiale maximale.Figure 3 is a longitudinal sectional view of a contact according to the invention in expansion position maximum radial.

Comme représenté sur la figure 1, le contact de type tulipe conforme à l'invention comporte de façon classique des doigts de contact 2 parallèles, disposés côte à côte selon les génératrices d'un cylindre et pourvus d'une embase commune 3. Les doigts 2 comporte une tige 6 solidaire de ladite embase 3 et un plot de contact 7, dont la distance par rapport à l'axe 8 longitudinal du contact est inférieure à celle de la tige 6. Les plots 7 sont pourvus d'une encoche interne 10.As shown in Figure 1, the type contact tulip according to the invention comprises conventionally parallel contact fingers 2, arranged side by side according to the generators of a cylinder and provided with a base common 3. The fingers 2 comprises a rod 6 integral with said base 3 and a contact pad 7, the distance of which relative to the longitudinal axis 8 of the contact is less to that of the rod 6. The studs 7 are provided with a notch internal 10.

Le contact comporte également un limiteur de course radiale des doigts constitué d'un tube 4 coaxial aux doigts 2. Le tube 4 est destiné à être disposé intérieurement aux doigts 2, son extrémité libre venant se loger dans les encoches 10 ménagées dans les plots 7.The contact also includes a stroke limiter radial fingers consisting of a tube 4 coaxial with the fingers 2. The tube 4 is intended to be disposed internally at the fingers 2, its free end being received in the notches 10 formed in the studs 7.

Le contact comporte enfin un socle 11 tubulaire comportant des rainures 12 disposées sur sa périphérie et régulièrement réparties en correspondance à la disposition des doigts 2. Ces rainures 12 reçoivent les extrémités de fixation de lames 5 de longueur sensiblement égale à celle du tube 4 et réalisées dans un métal à bonnes propriétés élastiques. A ce socle 11 est également fixé de façon rigide un tube de protection intérieur 13 réalisé dans un métal résistant à la température et assurant la protection thermique interne du contact lorsqu'un arc électrique apparaít à l'intérieur du contact tulipe. The contact finally comprises a tubular base 11 having grooves 12 arranged on its periphery and regularly distributed in correspondence available fingers 2. These grooves 12 receive the ends of fixing blades 5 of length substantially equal to that of tube 4 and made of a metal with good properties elastic. To this base 11 is also rigidly fixed an inner protection tube 13 made of a metal temperature resistant and provides protection internal thermal of the contact when an electric arc appears inside the tulip contact.

Lors du montage de ces pièces constitutives particulièrement simples à réaliser industriellement, le tube 4 vient bloquer les lames 5 par une bride 14 intérieure maintenant les extrémités des lames 5 dans les rainures 12, une fois ledit socle 11 emboíté dans le tube 4. Cet ensemble est alors emboíté dans l'embase 3 des doigts 2, les extrémités libres du tube 4 et des lames 5 venant se loger dans les encoches 10. Pour permettre un positionnement correct des lames 5 en face des doigts 2, l'embase 3 est pourvue de pions de positionnement 15, visibles sur les figures 2 et 3, venant s'emboíter dans des orifices prévus dans le socle 11. L'embase 3 des doigts 2 est alors fixée sur le socle 11 par l'intermédiaire de plots de fixation 16 reliés à une partie support du contact non représentée.During the assembly of these constituent parts particularly simple to carry out industrially, the tube 4 blocks the blades 5 with an internal flange 14 keeping the ends of the blades 5 in the grooves 12, once said base 11 fitted into the tube 4. This assembly is then fitted into the base 3 of the fingers 2, the free ends of the tube 4 and the blades 5 which are housed in the notches 10. To allow positioning correct blades 5 opposite fingers 2, base 3 is provided with positioning pins 15, visible on the Figures 2 and 3, coming to fit into the provided holes in the base 11. The base 3 of the fingers 2 is then fixed on the base 11 by means of fixing studs 16 connected to a support part of the contact not shown.

Le contact ainsi monté est représenté sur la figure 2. Dans cette position de repos, les lames 5 non déformées reposent sur la surface 9 de butée des encoches 10.The contact thus mounted is shown in FIG. 2. In this rest position, the blades 5 not deformed rest on the abutment surface 9 of the notches 10.

Lors de l'enclenchement du contact tulipe avec un contact mâle 1, comme représenté sur la figure 3, les doigts 2 prennent une position maximale d'expansion radiale. Cette expansion est limitée par la butée des doigts 2 contre le tube rigide 4 par leur surface 9. Entre ce tube 4 et la surface 9 se trouve l'extrémité libre d'une lame 5 pour chaque doigt 2. Cette lame 5 est donc déformée et du fait de son élasticité elle travaille en compression, poussant le plot 7 de chaque doigt 2 contre la surface externe du contact mâle 1, cette poussée s'additionnant à l'effort propre des doigts 2.When the tulip contact is engaged with a male contact 1, as shown in figure 3, fingers 2 assume a maximum position of radial expansion. This expansion is limited by the stop of the fingers 2 against the rigid tube 4 by their surface 9. Between this tube 4 and the surface 9 is the free end of a blade 5 for each finger 2. This blade 5 is therefore deformed and due to its elasticity it works in compression, pushing the pad 7 of each finger 2 against the external surface of the male contact 1, this thrust adding to the effort clean of fingers 2.

Cet effort additionnel obtenu grâce aux lames 5 est aisément ajustable en dimensionnant correctement celles-ci. L'on peut ainsi ,pour une même tulipe de doigts 2, obtenir l'effort de contact souhaité en ne modifiant que les pièces peu coûteuses que sont les lames 5.This additional effort obtained thanks to the blades 5 is easily adjustable by correctly dimensioning them. It is thus possible, for the same tulip of fingers 2, to obtain the desired contact force by modifying only the parts inexpensive blades are 5.

Claims (6)

  1. A thimble-type contact designed to co-operate with a cylindrical male contact (1) and provided with parallel contact fingers (2) disposed side-by-side along generator lines of a cylinder and provided with a common base (3), said contact including a radial stroke limiter for limiting the radial stroke of the fingers and constituted by a tube (4) which is coaxial with the fingers (2) and against which the fingers (2) come into abutment in the position of maximum radial expansion, said contact being characterized in that each finger (2) is associated with a resilient member (5) disposed between said tube (4) and the finger (2), and working in the compression direction during radial expansion of the fingers (2).
  2. A contact according to claim 1, in which each of the fingers (2) includes a stem (6) that is secured to said base (3) and a contact tab (7) which is closer to the longitudinal axis (8) of the contact than is the stem (6), said contact being characterized in that said tube (4) is disposed on the insides of the fingers (2), and in that, in the expanded position, the fingers (2) come into abutment against the tube (4) via a surface (9) provided in each of the contact tabs (7) of the fingers (2).
  3. A contact according to claim 1 or 2, characterized in that said resilient member is a blade (5) having a fixing end that is fixed in the vicinity of said base (3) and a free end that abuts against the fingers (2) when they are in the rest position.
  4. A contact according to claim 3, characterized in that the inside of each tab (7) is provided with a notch (10) which receives the free end of the tube and the free end of said blade (5).
  5. A contact according to claim 4, characterized in that it is provided with a rose (11) provided with grooves (12) for receiving the fixing ends of the blades (5), the tube (4) locking said blades (5) in place once said rose (11) is engaged on said tube, and itself being locked by the fingers (2), the base (3) of the fingers (2) being fixed to said rose (11).
  6. A contact according to claim 5, characterized in that the rose (11) supports an inner heat-protection tube (13).
EP94401989A 1993-09-08 1994-09-07 Tulip type electrical contact Expired - Lifetime EP0642145B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9310662A FR2709882B1 (en) 1993-09-08 1993-09-08 Tulip-type electrical contact.
FR9310662 1993-09-08

Publications (3)

Publication Number Publication Date
EP0642145A1 EP0642145A1 (en) 1995-03-08
EP0642145B1 true EP0642145B1 (en) 1998-10-21
EP0642145B2 EP0642145B2 (en) 2004-04-07

Family

ID=9450642

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Application Number Title Priority Date Filing Date
EP94401989A Expired - Lifetime EP0642145B2 (en) 1993-09-08 1994-09-07 Tulip type electrical contact

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Country Link
EP (1) EP0642145B2 (en)
AT (1) ATE172576T1 (en)
DE (1) DE69414062T3 (en)
FR (1) FR2709882B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803974C1 (en) * 1998-01-23 1999-08-12 Siemens Ag Contact arrangement for an electrical circuit breaker
DE19923458A1 (en) * 1999-05-21 2000-11-30 Knorr Bremse Systeme Electronically controlled braking system
EP1675144A1 (en) 2004-12-23 2006-06-28 ABB Technology AG High voltage switch with arc resistant short circuit current conductor
DE102010005945A1 (en) * 2010-01-22 2011-07-28 Siemens Aktiengesellschaft, 80333 Electrical contact element with a main axis
CN107706036A (en) * 2017-10-25 2018-02-16 宁波中迪机械有限公司 Fingertip component
CN107946099A (en) * 2017-10-25 2018-04-20 宁波中迪机械有限公司 A kind of electrical connection module
CN114649161B (en) * 2021-12-16 2024-04-05 河南平高电气股份有限公司 Three-station isolation grounding switch and isolation static contact

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492579A1 (en) * 1980-10-22 1982-04-23 Alsthom Atlantique CONTACT FOR ELECTRICAL EQUIPMENT, SUCH AS CIRCUIT BREAKER
DE3618455A1 (en) * 1986-06-02 1987-12-03 Siemens Ag Contact system for gas blowout switch - has contact laminae connected to sliding contact piece moving coaxially w.r.t. fixed contact piece

Also Published As

Publication number Publication date
DE69414062D1 (en) 1998-11-26
EP0642145B2 (en) 2004-04-07
ATE172576T1 (en) 1998-11-15
DE69414062T2 (en) 1999-04-08
EP0642145A1 (en) 1995-03-08
FR2709882B1 (en) 1995-10-20
FR2709882A1 (en) 1995-03-17
DE69414062T3 (en) 2004-12-30

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