EP2028721B1 - Commutateur d'installation doté d'un dispositif de borne de connexion - Google Patents

Commutateur d'installation doté d'un dispositif de borne de connexion Download PDF

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Publication number
EP2028721B1
EP2028721B1 EP08014192.2A EP08014192A EP2028721B1 EP 2028721 B1 EP2028721 B1 EP 2028721B1 EP 08014192 A EP08014192 A EP 08014192A EP 2028721 B1 EP2028721 B1 EP 2028721B1
Authority
EP
European Patent Office
Prior art keywords
screw
clamping
terminal
switching device
service switching
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
EP08014192.2A
Other languages
German (de)
English (en)
Other versions
EP2028721A3 (fr
EP2028721A2 (fr
Inventor
Matthias Bitz
Ralf Kraus
Klaus-Peter Dipl.-Ing. Eppe
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.)
ABB AG Germany
Original Assignee
ABB AG Germany
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP2028721A2 publication Critical patent/EP2028721A2/fr
Publication of EP2028721A3 publication Critical patent/EP2028721A3/fr
Application granted granted Critical
Publication of EP2028721B1 publication Critical patent/EP2028721B1/fr
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
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/301—Clamped connections, spring connections utilising a screw or nut clamping member having means for preventing complete unscrewing of screw or nut
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/34—Conductive members located under head of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/20—Connectors or connections adapted for particular applications for testing or measuring purposes

Definitions

  • the invention relates to a service switching device having an insulating material housing and a terminal arrangement for clamping a connecting conductor with an annular clamping shoe, according to the preamble of claim 1.
  • connection conductor is screwed in generic service switching devices on a screw hole having a stationary mounted inside the device connection plate with a clamping screw, which has a screw head and a screw shank.
  • the terminal assembly is located in a terminal receiving space having an insertion opening for the terminal conductor and an access opening to the screw head for actuating the clamping screw with a tool, such as a screwdriver.
  • a tool such as a screwdriver.
  • the terminal assembly is specially designed to connect a connecting conductor with a so-called annular clamping shoe, in particular with a clamping shoe with a closed ring.
  • annular clamping shoe so there is a hole through which the clamping screw is guided during clamping.
  • clamping screws are used with a flat head and a long shaft, which are screwed into a connection plate in the interior of the switching device housing. Of the Clamping shoe is thereby clamped between the screw head and the connection plate, optionally with the interposition of an additional pressure piece.
  • On the connection plate further, inside the leading conductors are attached, which carry the current path between an input and an output terminal through the installation switchgear.
  • a terminal conductor with an annular clamping shoe can not be clamped between the screw head and the terminal plate unless the terminal screw has been previously completely unscrewed and lifted from the terminal plate, thereby providing a passage for the closed terminal shoe at the insertion opening.
  • the clamping screw can fall out through the access opening and be lost.
  • the insertion of the clamping screw after inserting the terminal conductor with the annular terminal shoe requires some skill of the installer, because of the long shaft and the flat head of the commonly used clamping screws can easily tilt in the terminal receiving space between the access opening and the thread in the terminal plate, so that the screw shaft does not come into threaded engagement with the screw thread of the connection plate.
  • the DE 103 04 248 A1 shows a terminal device for an electrical device, which comprises a housing fixedly fixed to a connector, wherein the connector cooperates with a captive held clamping screw for making a Klemmtitle ist an electrical conductor, and wherein the clamping screw has an elongated cylindrical guide head, which in a housing bore free of play and slidably guided in the axial direction.
  • the DE 20 2004 002 779 U1 shows a terminal block with a number of terminal spaces with terminals with clamping screws, the clamping screws are spring loaded by means of one spring element in the direction of the open position of the clamping screw, so that is released with relaxed spring element of the terminal space for the insertion of a cable lug.
  • the restraint device is an undercut extending into the terminal receiving space in the region of the access opening, and the screw shank is chamfered at its free end to form a displacement member so that the clamping screw can be brought into the open position by pressing the clamping shoe onto the slope from the set-up position ,
  • retaining device a loss of the clamping screw is prevented. It may be sufficient in the embodiment according to the invention, the clamping shoe against the free end of the located in the Aufsetzposition Press the shaft of the clamping screw in order to push the clamping screw so far upwards over the bevel that the clamping shoe can slide on the connecting plate into its connection position.
  • the assembly is further simplified, since the clamping screw does not have to be lifted separately by hand, it eliminates the need to bring them into a particular open position before the clamping shoe can be inserted, and due to the guide, it still remains centered in the direction aligned with the screw hole in the terminal plate.
  • the screw head for the movable coupling first, head-side, in the direction of longitudinal movement of the screw extending guide means and the insulating housing comprises in the terminal receiving space second, receiving space-side guide means, which in inserted into the terminal receiving space screw for guiding the clamping screw interact in their longitudinal movement direction.
  • the first, head-side guide means may be part of the screw head.
  • the screw head is a longitudinally extending direction of the screw elongated cylinder, wherein the first guide means are formed by the shell of this cylinder.
  • the terminal receiving space comprises a wall extending in the longitudinal direction of movement of the clamping screw and leading the screw head.
  • leading wall is formed by the inner wall of a cylindrical guide channel in the terminal receiving space, which comprises the screw head.
  • the restraint device is an undercut extending into the terminal receiving space in the region of the access opening.
  • Such an undercut can easily be used in injection molding of the housing together with the housing shells to be made with. The clamping screw should then be inserted into the terminal compartment before closing the housing.
  • a further alternative embodiment which is not part of the invention provides that the screw head and the wall in the open position of the clamping screw are in threaded engagement, so that the clamping screw is held in the open position thereby movable. As a result, the clamping screw can be held in the open position in a defined position.
  • the threaded engagement between the clamping screw and the wall additionally prevents loss of the screw.
  • the threaded engagement between the screw head and the wall begins where the threaded engagement between the screw shaft and the screw hole ends.
  • the clamping screw is then unscrewed from its clamping position, in which it is screwed into the connecting thread on the connection plate, by actuation with a tool, it moves with the screw head in its longitudinal displacement direction upwards in the direction of the access opening.
  • the threaded engagement between the shank of the clamping screw and the screw thread of the connection plate ends.
  • connection plate is a leg of a U-shaped conductor rail, which is stationarily mounted in the housing of the service switching device and whose second, the terminal plate opposite leg is connected via a web with this.
  • connection plate At the free end of the connection plate can advantageously be formed a discharge for connecting further current conductors inside the service switching device.
  • the web can be contacted for testing and calibration purposes from outside the housing.
  • the contacting for testing purposes is required, for example, in the so-called hot test of the thermal release of a Leifungstikschalters.
  • a defined overcurrent which may be about 1.5 times the rated current, connected to the device and checks whether the thermal release inside actually triggers within the required shutdown ,
  • FIG. 1 shows schematically and as a partial section of an installation switching device 1, which has an insulating material 2.
  • the service switching device 1 is for example a circuit breaker.
  • Its insulating housing comprises a front and rear front 3,4, a front and rear narrow side 5,6 and a mounting side 7.
  • a terminal receiving space 10 is provided in the housing 2, in which a terminal assembly 11 is housed.
  • the terminal receiving space 10 is accessible at the rear narrow side 6 through an insertion opening 27 for a terminal conductor 12 and at the rear front side 4 through an access opening 28 for an actuating tool, such as a screwdriver 22.
  • the terminal conductor 12 which carries an annular clamping shoe 14 with a central opening 13, screwed by a clamping screw 15 to a connection plate 16.
  • the clamping screw 15 has a screw head 17 designed in the form of an elongate cylinder and a shaft 18.
  • the shaft 18 is approximately as long as the screw head 17.
  • the shaft 18 carries an external thread 19.
  • a slot 21 for receiving the operating tool, such as a screwdriver 22, is provided.
  • connection plate 16 carries a screw hole 23 with an internal thread 25. It is aligned approximately parallel to the rear front side 4.
  • the connection plate 16 forms a Leg of a U-shaped busbar 30, which is supported by web-like housing projections 32 fixed in the housing 2 of the service switching device 1.
  • the second leg 33 of the U-shaped busbar 30 is connected by means of a web 35 to the connection plate 16. It has an opening 34 which faces the screw hole 23 and also has a diameter at least as large as this.
  • the busbar 30 is arranged in the housing so that the web 35 comes to lie in the vicinity of the rear narrow side 6 and is accessible by a test opening 36 from the outside for contacting for testing or calibration purposes by means of a probe.
  • a discharge bar 37 is formed, to which further, in the interior of the service switching device 1 outgoing conductor can be connected.
  • these are not shown here, as well as all other required for operating a service switching device other components and assemblies, such as a thermal and electromagnetic release, a derailleur, a lever with a contact point, an arc extinguishing system, etc.
  • the clamping screw 15 is guided in an approximately cylindrical guide channel 24 in the terminal receiving space 10.
  • the guide channel 24 extends approximately parallel to the rear narrow side 6, so that the clamping screw 15 is guided by him perpendicular to the screw hole 23 in the connection plate 16 out.
  • the inner diameter of the guide channel 24 corresponds to the outer diameter of the screw head 17, so that the screw head 17 slidably guided in the guide channel 24 and is coupled in a manner movable with the insulating material inside the terminal receiving space 10.
  • the clamping screw 15 is shown in a Aufsetzwolf, that is, the free end of the screw shaft 18 is straight on the internal thread 25 of the screw hole 23. In this position, the annular clamping shoe 14 can not be inserted into the terminal receiving space 10 because it would be blocked by the screw shaft 18.
  • the clamping screw 15 Before inserting the clamping shoe, the clamping screw 15 must be lifted so far in the direction of arrow P upwards from the connection plate 16 be that a at least the thickness of the clamping shoe 14 corresponding space between the free end of the shaft 18 and the connection plate 16 is opened, so that then the clamping shoe 14 can be inserted through the insertion opening 27 until it abuts the discharge rail 37 and its opening 13 just above the screw hole 23 comes to rest. This position is in the FIG. 2 shown.
  • the discharge bar 37 thus still comes here as the second function of the Ein Industriesstops for the clamping shoe 14, thereby avoiding too far insertion of the clamping shoe and thus the assembly of the connection conductor 12 is further facilitated.
  • the screw head 17 carries in its upper part an external thread 38. On the inner wall of the guide channel 24, an internal thread 39 is introduced. This starts where in the Aufsetz too according to FIG. 1 the external thread 38 on the screw head 17 ends. If now in the in the FIG. 1 shown Aufsetz too the clamping screw 15 is further rotated by means of the screwdriver 22 in the direction of arrow R, the screw head 17 and the inner wall of the guide channel 24 come into threaded engagement and further rotation of the clamping screw 15 it is moved over the internal thread 39 upwards in the open position and held there at the termination of the rotational movement.
  • the clamping screw 15 can be moved by turning in the internal thread 39 back down. It covers the opening 13 of the clamping shoe 14 and holds it firmly.
  • the stem 18 could be received in the opening 34 of the second leg 33.
  • the opening 33 could also carry an internal thread and thus possibly also in threaded engagement with the shaft 18 and thus contribute to the clamping action of the screw.
  • FIG. 4 shows a further embodiment of the invention. All identical or equivalent components or assemblies carry in the FIG. 4 the same reference numerals as in the FIGS. 1 to 3 , preceded by a "10".
  • the undercut 1040 may be formed as an annular bead or a cross-sectional constriction of the guide channel 1024 upwards.
  • the reduced by the undercut 1040 cross-sectional area of the guide channel 1024 is still so large that a screwdriver 1022 can be performed to actuate the clamping screw 1015, but it is smaller than the cross section of the screw head, so that this somewhat captive in the guide channel 1024th is caught.
  • the lifting of the clamping screw 1015 from the touchdown position to the open position can be done here for example by magnetic holding force of the clamping screw 1025 on a magnetic screwdriver 1022.
  • the shaft 1018 is tapered slightly conically at its free end, indicated by the bevel 1042.
  • annular clamping shoes 1014 are usually very thin, the thickness of the ring of such a clamping shoe 1014 is often less than 1 mm. It may therefore be sufficient to press such a thin clamping shoe 1014 strongly against the free end of the in-put position shaft 1018 to push the clamping screw 1015 so far above the slope 1042 that the clamping shoe 1014 on the connection plate 1016 can slide into its connection position.
  • the assembly is further simplified because the clamping screw 1015 does not need to be lifted separately by hand, eliminating the need to bring them into a particular open position before the clamping shoe 1014 can be inserted.
  • the undercut and the slope are also in the embodiment according to the FIGS. 1 to 3
  • their special functional advantages such as the "captivation" of the clamping screw and the automatic pushing up of the clamping screw during insertion of the lead there are less relevant because both functions essentially by the internal thread in the Inside the guide channel in cooperation with the external thread on the outer surface of the screw head are realized.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Claims (9)

  1. Appareillage de commutation d'installation (1, 101) comprenant un boîtier en matériau isolant (2, 102) et un arrangement de bornes de raccordement (11, 1011) servant à raccorder un conducteur de raccordement (12, 1012) muni d'une cosse de serrage (14, 1014) de forme annulaire à une plaque de raccordement (16, 1016) présentant un trou de vis (23, 1023) et montée en position fixe à l'intérieur du boîtier, avec une vis de serrage (15, 1015), laquelle présente une tête de vis (17) et une tige de vis (18, 1018), la tige de vis (18, 1018) traversant la cosse de serrage (14, 1014) de forme annulaire lors du raccordement du conducteur de raccordement (12, 1012) et se trouvant en prise vissée avec le trou de vis (23, 1023), comprenant un espace d'accueil de bornes (10, 1010) muni d'un canal de guidage (24, 1024) ayant une surface intérieure, muni d'une ouverture d'introduction (27, 1027) pour le conducteur de raccordement (12, 1012) et une ouverture d'accès (28, 1028) destinée à la tête de vis (17) pour actionner celle-ci, la tête de vis (17) présentant une surface de guidage extérieure qui est en prise glissante avec la surface intérieure du canal de guidage (24, 1024) et étant ainsi accouplée avec le boîtier en matériau isolant (2, 102) à l'intérieur du canal de guidage (24, 1024) de manière mobile dans le sens du déplacement longitudinal de la vis de serrage (15, 1015), de sorte que lors d'un mouvement de la vis de serrage (15, 1015) entre une position ouverte de la vis, dans laquelle il existe entre l'extrémité libre de la tige de vis (18, 1018) et la plaque de raccordement (16, 1016), de la place pour l'insertion de la cosse de serrage (14, 1014) du conducteur de raccordement (12, 1012), et une position appliquée de la vis, dans laquelle commence à peine la prise vissée entre la tige de vis (18, 1018) et le trou de vis (23, 1023), l'axe de déplacement de la tige de vis (18, 1018) restant aligné dans la direction du trou de vis (23, 1023), et le canal de guidage (24, 1024) comprenant un dispositif de retenue (40, 1040) pour la vis de serrage (15, 1015) qui, en position ouverte, empêche de retirer la vis de serrage (15, 1015) hors de l'espace d'accueil de bornes (10, 1010), caractérisé en ce que le dispositif de retenue est formé dans la zone de l'ouverture d'accès par une portion du canal de guidage munie d'un rétrécissement de la section transversale qui est plus étroite que le diamètre de la tête de vis, et en ce que la tige de vis (1018) est biseautée en forme conique à son extrémité libre en vue de former un organe de déplacement, de sorte que la vis de serrage, par une pression de la cosse de serrage sur le biseau, peut être amenée de la position appliquée à la position ouverte.
  2. Appareillage de commutation d'installation selon la revendication 1, caractérisé en ce que la cosse de serrage (1014), dans une position serrée de la vis de serrage (1015), peut être serrée directement entre la tête de vis et la plaque de raccordement (1016).
  3. Appareillage de commutation d'installation selon la revendication 2, caractérisé en ce que la tête de vis, en vue de l'accouplement mobile, comprend des premiers moyens de guidage côté tête, qui s'étendent dans le sens du déplacement longitudinal de la vis, et en ce que le boîtier en matériau isolant comprend des deuxièmes moyens de guidage (1024), côté espace d'accueil dans la zone de l'espace d'accueil des bornes (1010), lesquels coopèrent lorsque la vis est introduite dans l'espace d'accueil des bornes (1010) pour guider la vis de serrage (1015) dans le sens de son déplacement longitudinal.
  4. Appareillage de commutation d'installation selon la revendication 3, caractérisé en ce que la tête de vis est un cylindre allongé dans le sens du déplacement longitudinal de la vis, les premiers moyens de guidage (1024) étant formés par l'enveloppe de ce cylindre.
  5. Appareillage de commutation d'installation selon la revendication 4, caractérisé en ce que l'espace d'accueil des bornes (1010) comprend une paroi qui s'étend dans le sens du déplacement longitudinal de la vis de serrage (1015) et qui entoure la tête de vis en la guidant.
  6. Appareillage de commutation d'installation selon la revendication 5, caractérisé en ce que la paroi est formée par la paroi intérieure d'un canal de guidage de forme cylindrique dans l'espace d'accueil des bornes (1010), lequel entoure la tête de vis.
  7. Appareillage de commutation d'installation selon l'une des revendications précédentes, caractérisé en ce que la plaque de raccordement (1016) est une branche d'une barre-bus en forme de U, laquelle est montée en position fixe dans le boîtier de l'appareillage de commutation d'installation et dont la deuxième branche, à l'opposé de la plaque de raccordement (1016), est reliée avec celle-ci par le biais d'un élément jointif (1035).
  8. Appareillage de commutation d'installation selon la revendication 7, caractérisé en ce qu'à l'extrémité libre de la plaque de raccordement (1016) est façonné un rail de dérivation (1037) servant au raccordement de conducteurs électriques supplémentaires à l'intérieur de l'appareillage de commutation d'installation.
  9. Appareillage de commutation d'installation selon l'une des revendications 7 ou 8, caractérisé en ce qu'un contact peut être établi avec l'élément jointif (1035) depuis l'extérieur du boîtier à des fins de contrôle et de calibrage.
EP08014192.2A 2007-08-22 2008-08-08 Commutateur d'installation doté d'un dispositif de borne de connexion Active EP2028721B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007039709A DE102007039709A1 (de) 2007-08-22 2007-08-22 Installationsschaltgerät mit einer Anschlussklemmenanordnung

Publications (3)

Publication Number Publication Date
EP2028721A2 EP2028721A2 (fr) 2009-02-25
EP2028721A3 EP2028721A3 (fr) 2010-08-04
EP2028721B1 true EP2028721B1 (fr) 2015-02-25

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US (2) US7704105B2 (fr)
EP (1) EP2028721B1 (fr)
DE (1) DE102007039709A1 (fr)

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Publication number Publication date
US7704105B2 (en) 2010-04-27
US20090053927A1 (en) 2009-02-26
EP2028721A3 (fr) 2010-08-04
EP2028721A2 (fr) 2009-02-25
US20100227513A1 (en) 2010-09-09
DE102007039709A1 (de) 2009-02-26
US7980903B2 (en) 2011-07-19

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