EP2272135B1 - Einrichtung zur verhinderung der erzeugung eines elektrischen bogens zwischen zwei leitfähigen elementen - Google Patents

Einrichtung zur verhinderung der erzeugung eines elektrischen bogens zwischen zwei leitfähigen elementen Download PDF

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Publication number
EP2272135B1
EP2272135B1 EP09726942.7A EP09726942A EP2272135B1 EP 2272135 B1 EP2272135 B1 EP 2272135B1 EP 09726942 A EP09726942 A EP 09726942A EP 2272135 B1 EP2272135 B1 EP 2272135B1
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EP
European Patent Office
Prior art keywords
electrically conductive
devoid
connector
adjacent
dielectric material
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.)
Active
Application number
EP09726942.7A
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English (en)
French (fr)
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EP2272135A2 (de
Inventor
Denis Payan
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.)
Centre National dEtudes Spatiales CNES
Original Assignee
Centre National dEtudes Spatiales CNES
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.)
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Publication date
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Publication of EP2272135A2 publication Critical patent/EP2272135A2/de
Application granted granted Critical
Publication of EP2272135B1 publication Critical patent/EP2272135B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/74—Devices having four or more poles, e.g. holders for compact fluorescent lamps
    • H01R33/76—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket
    • H01R33/7678—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket having a separated part for spark preventing means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/726—Making a non-soldered electrical connection simultaneously with the heat shrinking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2107/00—Four or more poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections

Definitions

  • the present invention relates to a device for preventing the establishment of an electric arc between two adjacent parts and devoid of electrical insulation of at least two electrically conductive elements, for example between facing conductive elements which protrude from the surface of a connector body.
  • the invention finds particular application in electrical or electronic components, such as connectors, implemented in a space environment or in conditions reproducing such an environment. However, it should be understood that the invention applies generally to electrical or electronic components to be implemented in any environment where an electric arc is likely to form between two conductive elements facing.
  • the document GB-1 334 969 discloses a connector corresponding to the preamble of claim 1 and constitutes the state of the art closest.
  • conductive elements may be, for example, pins (also commonly called “pins") of a male connector plug in a female connector, or the ends of cores of conductive wires which are stripped about 1 mm and welded or crimped in conductive metal tubes connected to the pins.
  • Such conductive elements are arranged facing one another, in particular parallel to each other, and are separated by air or vacuum spaces.
  • a precursor phenomenon (filament, dust, ESD, high voltage, etc.) is likely to generate between the stripped portions of two conductive elements a local plasma.
  • the latter while relaxing, will make the medium conductive and establish a short circuit between the two conductive elements.
  • an intense electric field can be the cause of the generation of such a plasma.
  • the invention therefore aims to prevent the formation, or at least the establishment of these arcs between two electrically conductive elements.
  • the invention relates to an electrical connector as claimed in claim 1.
  • This connector is remarkable in that the dielectric material in which the piece is made is deformable or sufficiently compressible.
  • the connector prevents the electrically conductive parts devoid of electrical insulation from being directly facing one another, at least partially filling the space between the conductive elements.
  • the fact that the dielectric material in which the part is made is deformable or sufficiently compressible allows in particular to adapt the shape of the workpiece to the shape of the electrically conductive portion of the conductive element which is devoid of electrical insulation.
  • the connector has the effect of preventing the arcing when it is used in an environment where a plasma is likely to be created and relaxed, such as a space environment.
  • the part prevents the establishment of an electric arc in any direction around the electrically conductive portion devoid of electrical insulation, thanks to the fact that the part surrounds this electrically conductive portion.
  • the connector according to the invention may comprise one or more features as claimed in claims 2 to 6, taken separately or in combination.
  • the Figures 1 to 3 show a male connector 1 capable of being implemented in a space environment (where an electric arc can be established between two electrically conductive elements opposite).
  • the connector 1 comprises, in a conventional manner, a casing 2 of trapezoidal section enclosing a connector body 3.
  • the connector body 3 is made of dielectric material of the plastic material type, generally by molding.
  • the body 3 has on one of its surfaces 5, pins 7 of projecting connection ( figure 1 ) electrically conductive, and on its other surface 9, housing 11 of tubular shape and projections which are also electrically conductive.
  • the tubular housings are intended to accommodate stripped ends 12 of electrically conductive wires 13 in order to hold them by welding 14 (see FIG. figure 3 ) for example, or by crimping according to a method known to those skilled in the art.
  • Each pin 7 is connected to a tubular housing 11 in the mass of the body 3, so that each tubular housing constitutes an electrical connection between an electrically conductive wire 13 and a pin 7.
  • the pins 7 are distributed in two rows offset with respect to one another.
  • housings 11 are also distributed in two rows offset with respect to one another. They each have a cut-out aperture facing outwardly of the connector body, in order to facilitate the insertion of the stripped portions 12 of the wires 13 which must be welded thereto ( figure 2 ).
  • the housing 2, enclosing the body 3, has two openings 15 and 17 for, respectively, to pass through the tubular fixing housing 11 and allow access to the pins 7.
  • the housing 2 has a peripheral flat flange 19 having bores 21. These allow the attachment of the connector in a box 23 which comprises the conductive wires 13 welded to the tubular housing 11.
  • the wires 13 come from a cable 25 introduced into the box 23 through an opening 27 formed in the box.
  • the box 3 protects the stripped portions 12 of the wires 13 and the welds 14, in particular by keeping the wires 13 in position thanks to the diameter of the opening 27 which is adjusted to the diameter of the cable 25, thus limiting the movements of the cable 25.
  • a first embodiment is represented in figure 4 .
  • the device for preventing the establishment of an arc comprises several parts 29 each made of a dielectric material.
  • the dielectric material is a deformable plastic material.
  • the piece 29 is made in the form of a sleeve threaded around the stripped portion 12 of the electric wire 13.
  • the piece 29 thus has an opening 30 through which the electric wire 13 passes.
  • the opening 30 preferably has a diameter greater than or equal to that of the electric wires 13 so that the part 29 can be freely moved along the electric wire 13.
  • the part 29 in a first position, can be placed around the electrically conductive portion of the wire 13 which is devoid of electrical insulation, constituted by the stripped portion 12, of the weld 14 and the tubular housing 11, while being in abutment against the surface 9 of the body 3 of dielectric material of the connector.
  • the part 29 can be placed at a distance from this electrically conductive portion of the wire 13 which is devoid of electrical insulation, leaving the latter accessible for, for example, to repair a defective weld.
  • the tubular piece 29 has a height such that it completely covers the tubular housing 11, the weld 14, the stripped portion of the wire 13 and a portion of the sheath of the wire 13.
  • the piece 29 completely covers, from the surface 9 of the connector body, all the conductive parts of the projecting elements with respect to the surface 9, which guarantees optimum insulation and prevents any arcing from these conductive parts .
  • the height of the element 29 is greater than the height of the conductive parts of the projecting elements placed end to end.
  • the height of the element 29 is here between 3 and 10 mm in the context of a connector where the housing 11 have a height substantially equal to 2.5 mm. It should be understood, however, that the heights indicated are only in the context of an exemplary embodiment and that the invention is not limited thereto.
  • the dimensions, the shape and the elastically deformable or compressible material of the part 29 may be chosen so that once in position this piece substantially matches the shape of the sheathed portion of the wire 13, and if appropriate those of the stripped portion 12 of the wire 13, the weld 14 and the tubular housing 11 without leaving any space with these elements, while preferably allowing the movement and positioning of the piece 29 along the wire 13.
  • the tubular housing 11, the 14 and the stripped portion of the wire 13 are then completely enclosed in a closed dielectric chamber defined by the body 3 in dielectric material of the connector, the piece 29 bearing against the surface 9 of the body 3 and the sheathed portion of the wire 13 gripped by the piece 29.
  • the device according to the invention comprises a part 31 which comprises a plate 34 consisting of a substantially rectangular wall, which is made of a flexible dielectric material, elastically deformable or compressible.
  • the plate 34 has, on either side of the wall of which it is made, tubular elements 33 forming chimneys.
  • the tubular elements 33 are integral with the plate 34.
  • the tubular elements 33 are thus interconnected by material bridges 35.
  • Each tubular element has a through opening 32 in which is inserted a conductive wire 13 and the housing 11 in which the wire is fixed.
  • the openings 33 each have an internal diameter substantially greater than the external diameter of the electrically conductive parts of the wires 13 which are devoid of electrical insulation, in other words bare portions 12 of the conductive wires 13, welds 14 and housings 11.
  • Each tubular element 33 can thus accommodate an electrically conductive portion devoid of insulation of an electrically conductive element.
  • the part 31 thus produced fills or partitions the spaces between the electrically conductive parts of the son 13 and thus prevents the establishment of an electric arc between them.
  • Such a device providing such an effect is represented in figure 6 .
  • the device comprises insulating pieces 37 made in the form of rings in a flexible or compressible dielectric material.
  • the device comprises as many parts 37 as the connector comprises pins 7. Each part 37 is fitted around a pin 7.
  • the rings 37 have a thickness of between 0.5 and 1 mm.
  • Such a thickness makes it possible to isolate a pin 7 on a height greater than that of a pin portion 8 which will remain bare and devoid of electrical insulation when the pins 7 of the male connector will be inserted into the correspondingly shaped receiving housings a female connector (not shown).
  • the diameter of a ring 37 is substantially equal to or less than half of the distance separating Ieux pins 7 contiguous.
  • the rings 37 can, however, be moved along the pins 7 to bear against the surface 5 of the body 3 under the action of a force.
  • the surface of the body of the female connector coming into contact with the rings repels the latter until they collapse on the surface 5 of the body 3.
  • the rings 37 are deformed between the surface of the body of the male connector 1 and that of the body of the female connector in their insertion position.
  • the rings 37 constitute seals defining with the dielectric material surfaces of the male and female connectors closed dielectric enclosures which isolate the conductive portions 8 of the pins 7 from each other.
  • the rings 37 prevent any establishment of arcs between the parts 8 of pins 7 of the male connector which would not be completely inserted into the female connector.
  • the figure 7 illustrates such a variant.
  • the device comprises a plate 39 made of a flexible dielectric material.
  • the plate 39 has as many orifices 41 as the connector 1 has pins 7.
  • each orifice 41 is made in the plate 39 in such a way that each can accommodate a pin 7. To do this, each orifice 41 has a diameter substantially greater than that of the pins 7.
  • the plate 39 is traversed by the pins 7 when it is implemented on the connector 1, by insertion of the pins 7 in the orifices 41.
  • the plate 39 is also disposed against the surface 5 of the body 3 of the connector 1.
  • the flexible plate 39 of dielectric material is crushed between the dielectric material surface 5 of the body 3 of the male connector 1 and the dielectric material surface of the connector female and defines with these surfaces closed walled enclosures of dielectric material which isolate from each other the conductive portions 8 of the pins 7.
  • the plate 39 thus makes it possible to fill or partition the spaces between the pins 7, so that no electric arc primer is possible.
  • the flexible dielectric material in which the plate 39 is made is rubber or a flexible equivalent adapted to a space environment, so that the plate 39, crushed between the two surfaces of the body of connectors, while deforming, perfectly marries the contours of the pins 7 and the surfaces of the bodies of the two connectors between which the plate is sandwiched.
  • the plate 39 In order to facilitate the installation of the plate 39, provision is made to predispose the plate 39 to the connector 1, that is to say that the connector is equipped with a plate 39 whose holes 41 are each arranged opposite a pin 7.
  • the plate could marry directly the shape of existing male and female connectors. This would only add the insulating element without making a specific connector.
  • the plate 39 is connected to an element 43 of the connector 1 by frangible bridges 40 which can be broken at the time of connection of the male connector 1 with a female connector.
  • the frangible bridges 40 are broken and the plate 39, arranged in such a way that the pins 7 each face an orifice 41, is pressed against the surface 5 of the body 3 of the connector.
  • the device according to the invention makes it possible to prevent the establishment of an electric arc between two electrically conductive elements opposite which are locally deprived of electrical insulation.
  • the invention could also, for example, include a part made from two symmetrical half-shells.
  • the two half-shells would be made of dielectric material.
  • the two half-shells would be fixed together in a plane of symmetry by being reported on either side of the electrically conductive elements devoid of electrical insulation.
  • Such an embodiment would have the advantage of allowing the mounting of the device according to the invention around the son of a connector without having, for example, to disassemble the son.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Insulators (AREA)

Claims (6)

  1. Elektrischer Verbinder, aufweisend
    einen Körper (3) aus einem dielektrischen Material, welcher auf derselben Fläche (9) wenigstens zwei vorstehende Aufnahmen (11) aufweist, die benachbart sind und elektrisch leitfähig sind, und
    wenigstens zwei elektrisch leitfähige Drähte (13), welche wenigstens zwei Abschnitte, die benachbart sind und die frei von elektrischem Isolator sind, (14, 12) haben, wobei die zwei benachbarten Abschnitte elektrisch verbunden sind und fixiert sind in zwei zugehörigen, benachbarten, vorstehenden Aufnahmen (11) , und
    eine Vorrichtung zum Verhindern der Erzeugung eines elektrischen Lichtbogens zwischen zwei benachbarten Abschnitten (14, 12), welche wenigstens ein Teil (29; 31) aufweist, welches aus einem dielektrischen Material gefertigt ist und welches wenigstens eine durchgehende Öffnung (30; 32) zum Aufnehmen von wenigstens einem unter den wenigstens zwei elektrisch leitfähigen Drähten (13) derart, dass sie wenigstens einen der zwei Abschnitte, die benachbart sind und die frei von elektrischem Isolator sind, (14, 12) von den wenigstens zwei elektrisch leitfähigen Drähten (13) umgibt, aufweist, gekennzeichnet dadurch, dass das dielektrische Material, aus welchem das Teil (29; 31) gefertigt ist, elastisch verformbar oder zusammendrückbar ist, und dadurch, dass das Teil von der Fläche (9) aus wenigstens eine der zwei benachbarten, vorstehenden Aufnahmen (11) vollständig und wenigstens einen zugehörigen der zwei benachbarten Abschnitte (14, 12), die frei von elektrischem Isolator sind, umhüllt.
  2. Elektrischer Verbinder gemäß dem Anspruch 1, gekennzeichnet dadurch, dass das Teil (29) eine Muffe ist.
  3. Elektrischer Verbinder gemäß dem Anspruch 2, gekennzeichnet dadurch, dass das Teil (29; 31) eine Höhe hat, welche mindestens gleich der Länge der aneinandergereihten, leitenden Abschnitte der Elemente in der Gesamtheit, welche von dem Abschnitt, der benachbart ist und frei von elektrischem Isolator ist, eines elektrisch leitfähigen Drahts und von der Höhe der zugehörigen vorstehenden Aufnahme gebildet ist, genommenen ist.
  4. Elektrischer Verbinder gemäß dem Anspruch 3, gekennzeichnet dadurch, dass die Höhe des Teils (29; 31) zwischen 3 und 10mm liegt.
  5. Elektrischer Verbinder gemäß dem Anspruch 1, gekennzeichnet dadurch, dass das Teil (31) eine Platte (34) aufweist und wenigstens zwei durchgehende Öffnungen (41) zum Aufnehmen eines jeden der wenigstens zwei elektrisch leitfähigen Drähte (7) aufweist, wobei die Platte beidseits einer im Wesentlichen rechteckige Wand, von welcher sie gebildet ist, rohrförmige Elemente (33) aufweist, welche Türme bilden und aus einem Material mit der Platte (34) gefertigt sind.
  6. Elektrischer Verbinder gemäß irgendeinem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass das Teil (29; 31) um wenigstens einen unter den wenigstens zwei elektrisch leitfähigen Drähten (13) herum bewegbar angebracht ist zwischen
    einerseits einer ersten Position, worin das Teil um den Abschnitt, welcher frei von elektrischem Isolator ist, (14, 12) des elektrisch leitfähigen Elements (13) und die vorstehende Aufnahme (11) herum angeordnet ist, wobei es in Anlage gegen die Fläche (9) des Körpers (3) ist, und
    andererseits einer zweiten Position, worin das Teil im Abstand von dem Abschnitt oder den Abschnitten, welche frei von elektrischem Isolator sind, (14, 12) der elektrisch leitfähigen Drähte (13) angeordnet ist, um den oder die Abschnitte, welche frei von elektrischem Isolator sind, zugänglich zu lassen.
EP09726942.7A 2008-03-21 2009-03-16 Einrichtung zur verhinderung der erzeugung eines elektrischen bogens zwischen zwei leitfähigen elementen Active EP2272135B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0851841A FR2929050B1 (fr) 2008-03-21 2008-03-21 Dispositif pour prevenir l'etablissement d'un arc electrique entre deux elements conducteurs
PCT/FR2009/050426 WO2009122076A2 (fr) 2008-03-21 2009-03-16 Dispositif pour prévenir l'établissement d'un arc électrique entre deux éléments conducteurs

Publications (2)

Publication Number Publication Date
EP2272135A2 EP2272135A2 (de) 2011-01-12
EP2272135B1 true EP2272135B1 (de) 2016-10-19

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ID=40029268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09726942.7A Active EP2272135B1 (de) 2008-03-21 2009-03-16 Einrichtung zur verhinderung der erzeugung eines elektrischen bogens zwischen zwei leitfähigen elementen

Country Status (4)

Country Link
US (1) US8297995B2 (de)
EP (1) EP2272135B1 (de)
FR (1) FR2929050B1 (de)
WO (1) WO2009122076A2 (de)

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4501927A (en) * 1983-08-31 1985-02-26 Minnesota Mining And Manufacturing Company Apparatus and method for sealing splices in insulated electrical cables

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JPS5985041U (ja) 1982-11-26 1984-06-08 古河電気工業株式会社 防水型熱収縮性被覆具
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KR100195169B1 (ko) * 1996-02-24 1999-06-15 손욱 음극선관의 리드핀 보호용 프로텍터
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US4501927A (en) * 1983-08-31 1985-02-26 Minnesota Mining And Manufacturing Company Apparatus and method for sealing splices in insulated electrical cables

Also Published As

Publication number Publication date
US20110097916A1 (en) 2011-04-28
WO2009122076A2 (fr) 2009-10-08
FR2929050A1 (fr) 2009-09-25
US8297995B2 (en) 2012-10-30
EP2272135A2 (de) 2011-01-12
WO2009122076A3 (fr) 2009-11-26
FR2929050B1 (fr) 2010-07-30

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