EP0592336B1 - Anschlussklemme für Elektrogeräte - Google Patents

Anschlussklemme für Elektrogeräte Download PDF

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Publication number
EP0592336B1
EP0592336B1 EP19930420388 EP93420388A EP0592336B1 EP 0592336 B1 EP0592336 B1 EP 0592336B1 EP 19930420388 EP19930420388 EP 19930420388 EP 93420388 A EP93420388 A EP 93420388A EP 0592336 B1 EP0592336 B1 EP 0592336B1
Authority
EP
European Patent Office
Prior art keywords
screw
movable contact
cable
contact part
tunnel
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
EP19930420388
Other languages
English (en)
French (fr)
Other versions
EP0592336A1 (de
Inventor
André Merlin Gerin Rossi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric SE
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0592336A1 publication Critical patent/EP0592336A1/de
Application granted granted Critical
Publication of EP0592336B1 publication Critical patent/EP0592336B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
    • H01R4/4863—Coil spring
    • H01R4/4872—Coil spring axially compressed to retain wire end

Definitions

  • the present invention relates generally to a connection terminal for electrical power equipment, this terminal comprising a cage which forms a closed side wall which surrounds a cage housing and a screw screwed through the side wall of the cage so its internal end is located in the cage housing.
  • connection terminals are provided which allow electrical cables to be electrically connected to electrical power equipment.
  • a power circuit breaker can have at least two connection terminals intended to be connected respectively to an incoming cable and to a current starting cable.
  • a person responsible for the installation of these electrical power apparatuses assembles each electrical apparatus on a fixed support, strips the end of an electric cable, threads this end into a terminal housing and screws a terminal screw up to when locked to establish an efficient mechanical and electrical connection between the electrical cable and the connection terminal.
  • the person in charge of such an installation subsequently called the installer, must take care to exert a tightening torque on the screw which is neither too weak nor too strong.
  • connection devices which allow an electrical cable to be connected without using a clamping screw
  • these devices use a spring leaf which is bent.
  • the person To connect a stripped end of an electric cable to this connection device, the person must exert pressure on a part of the leaf spring in order to flex it elastically so that the stripped end of the cable can be introduced between a hook-shaped part formed in the vicinity of the free end of the spring leaf and a fixed part, so that when the person releases his pressure action on the spring leaf, the latter returns elastically causing pinching the stripped end of the cable between the hook of the spring leaf and the fixed part in order to establish a permanent electrical connection between the cable and the connection device.
  • connection device determines the restoring force of the spring leaf, and this force is therefore substantially constant and independent of how the person acts on the connection device.
  • a known connection device has the drawback that the pinching of the stripped end of the cable takes place between almost point areas of the hook of the resort blade and of the fixed part, and this does not ensure a electric contact sufficiently effective to be able to pass an intense current.
  • the electric current flows in a part of the leaf spring and as this leaf spring must generally be made of a steel which has a relatively high resistivity, this further decreases the possibilities of using such a device. connection for dense electric currents.
  • connection device has so far been used only for low power electrical equipment, for example for sockets for electric bulbs operating at 220 V with a relatively low power of for example 100 W.
  • connection devices have could also be used for other low-voltage and low-power electrical equipment.
  • connection device For high power electrical equipment (hereinafter simply called electrical power equipment), for example electrical equipment operating at high voltage or with high currents greater than 1 Ampere, such a connection device could never be used satisfactorily and it was always necessary to use a connection terminal comprising a screw intended to be screwed until it is blocked in order to establish the electrical contact between the cable and the terminal.
  • Document DE-A-2 248 430 describes an electrical connector equipped with a pressure element cooperating with a spring to press the stripped end of a conductor against a fixed T-shaped contact surface.
  • the pressure element is movable by means of an actuating button, which must be pressed against the force of the spring, to allow the introduction of the stripped end of the cable between the insulating part and a notched part of the surface of
  • the pressure element advantageously consists of a piece of insulating material. After releasing the action of pressing the button, the previously compressed spring relaxes, and causes the stripped end of the conductor to pinch against the contact surface.
  • Such a device is intended to form a simple terminal block, using a relatively weak spring to be able to be compressed by a relatively moderate driving force.
  • Document DE-C-1 212 612 also relates to a terminal block, in which a spring biases a clamping jaw in the direction of a fixed jaw to ensure the jamming of a conductor.
  • An object of the present invention is to provide a connection terminal for electrical power equipment for ensuring effective electrical contact between the cable and the terminal capable of passing an intense electric current, the terminal being further designed so that that the installer cannot make a connection in which the cable pinching is too weak or too strong, in other words, that the clamping force is independent of the installer.
  • Another object of the invention is to provide such a connection terminal which can be actuated by an installer in a more convenient and reliable manner in order to make a connection or disconnection of an electric cable.
  • Another object of the invention consists in proposing such a connection terminal allowing moreover an installer to be able to easily control whether this connection terminal is connected to an electric cable or is not connected to an electric cable.
  • Another object of the invention consists in proposing such a connection terminal which can be fixed on an appropriate support of an electrical apparatus without an operation of the terminal being able to cause a deterioration of this support.
  • connection terminal for electrical power equipment comprising a cage which forms a closed side wall which surrounds a housing for cage and a screw screwed through the side wall of the cage so that its internal end is located in the cage housing.
  • connection terminal further comprises: a movable contact part housed in the cage housing so as to be able to move in the cage housing, this movable contact part forming a cable housing intended to receive an electric cable; a compression spring arranged in a space separating an internal wall of the cage and an external wall of the movable contact piece, this spring being located opposite the screw so as to elastically push the movable contact piece against the internal end of the screw, so that actuation of the screw in one direction causes the moving contact piece to move by compressing the spring and that actuation of the screw in the opposite direction causes movement of the piece movable contact by relaxing the spring; and a fixed contact surface disposed near the electric cable engaged in the movable contact piece, so that the actuation of the screw in the direction which causes the displacement of the movable contact piece by relaxing the spring causes the pinching cable between the movable contact piece; and the fixed contact surface, the gripping force being provided by the elastic force of the spring, and that the actuation of the
  • a connection terminal 1 for electrical power equipment (not shown) comprises a cage 2 which forms a closed side wall 3 which surrounds a cage housing 4.
  • a screw 5 is screwed through the side wall 3 of the cage 2 so that its internal end 6 is located in the cage housing 4.
  • a movable contact piece 7 is housed in the cage housing 4 so as to be able to move laterally in the cage housing 4, this movement taking place in a direction parallel to the longitudinal axis 8 of the screw 5.
  • the movable contact piece 7 comprises a hole 9 substantially in its central part, this hole preferably being cylindrical and being oriented so that its longitudinal axis 10 is substantially perpendicular to the longitudinal axis 8 of the screw 5.
  • a hole 11 is also formed through the side wall 3 of the cage 2, this hole being able to pass right through the cage 2, as shown in Figure 1 or can simply pass through one side of the side wall 3 (according to a variant not shown).
  • the screw 5 is supported at its internal end 6 against a bearing face 12 of the movable contact piece 7.
  • the movable contact piece 7 further comprises a lateral face 13 opposite the contact face 12, c that is to say that the side face 13 is located in the part of the movable contact piece 7 which is the farthest from the screw 5.
  • a compression spring 14 is housed between the side face 13 of the contact piece mobile 7 and a bearing face 15 located in the cage housing 4 of the cage 2.
  • a shallow recess is provided at the side face 13 and another shallow recess is provided at the level of the bearing face 15 so that the compression spring 14 is engaged respectively in one and the other of these two housings in order to be kept lateral.
  • the compression spring 14 permanently pushes the movable contact piece 7 against the screw 5. If the screw 5 is completely screwed, the movable contact piece 7 is moved so that its lateral face 13 is brought closer to the face d 'support 15 thereby strongly compressing the compression spring 14. In this position (which is not shown in FIG.
  • the hole 9 of the movable contact piece is substantially aligned with the hole 11 of the cage 2 and it is then possible to pass through these two holes a stripped portion 16 of an electric cable 17, a relatively large clearance being provided between the stripped portion 16 and the two holes 9 and 11 so that this stripped portion 16 can be easily put on.
  • an installer can unscrew the screw 5 so that it moves towards the outside of the cage 2, this unscrewing producing a displacement of the movable contact piece 7 under the action of the compression spring 14, this displacement according to the displacement of the screw 5 (this displacement of the movable contact part 7 taking place upwards in the drawing of FIG. 1).
  • the pinching force corresponds exactly to the compression force of the spring 14.
  • FIGS. 2 and 3 show another embodiment of a connection terminal according to the invention.
  • This terminal 20 comprises a cage 21 which forms a closed side wall 22 which surrounds a cage housing 23.
  • a screw 24 is screwed through the side wall 22 of the cage 21 so that its internal end 25 is located at inside the cage housing 23.
  • a contact piece 26 is movably mounted inside the cage housing 23 and this movable contact piece 26 has a recess 27.
  • a stripped end 16 of a cable 17 can be inserted into the recess 27 of the movable contact piece 26.
  • a fixed pad 28, integral with the cage 21, extends partially in the recess 27 of the movable contact piece 26 of such so that the stripped end 16 of the cable 17 is then located between a bearing face 29 of the recess 27 and a fixed contact surface 30 of the fixed area 28.
  • the contact surface 29 is directed towards the screw 24 and the fixed contact surface 30 is directed towards the contact surface t 29.
  • a compression spring 31 is disposed between the movable contact piece 26 and an internal bearing surface 32 forming part of the cage housing 23.
  • the compression spring 31 permanently pushes the movable contact piece 26 in the direction of the screw 24 and, when the screw 24 is completely screwed into the cage 21, the movable contact piece 26 is moved so as to compress the compression spring 31 and so that the contact surface 29 of the movable contact piece 26 and the fixed contact surface 30 of the fixed pad 28 are relatively spaced from one another so that the stripped end 16 of the cable 17 can be inserted with some play Then, by unscrewing the screw 24 so that it is moved towards the outside of the cage 21, the corresponding displacement of the movable contact piece 26 is caused under the action of the compression spring 31 and this causes the pinching of the stripped end 16 of the cable between the surfaces 29 and 30.
  • the part which is fixed relative to the electrical equipment is the fixed track 28 while in the first embodiment shown on In FIG. 1, the fixed part with respect to the electrical equipment is the cage 2.
  • This stop means can be constituted for example by a widening of the internal end 6 (or 25) of the screw.
  • the screw 5 may advantageously include a display so that the installer can see whether it is screwed on or off.
  • This display element can be constituted, for example, by a color mark located in a region of the screw which is visible when the screw is unscrewed, that is to say when the screw is in the position moved outward relative to to the cage and invisible when the screw is screwed, that is to say moved towards the inside of the cage.

Landscapes

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

Claims (6)

  1. Anschlußklemme für ein elektrisches Leistungs-Schaltgerät mit einem Rahmen (2; 21), der eine geschlossene, eine Rahmenaufnahme (4; 23) umschließende Seitenwand (3; 22) bildet, sowie einer durch die Seitenwand des Rahmens geschraubten Schraube (5; 24), deren inneres Ende (6; 25) innerhalb der Rahmenaufnahme angeordnet ist, dadurch gekennzeichnet, daß sie darüber hinaus
    ein bewegliches Kontaktelement (7; 26), das so in der Rahmenaufnahme gelagert ist, daß es in der Rahmenaufnahme verschoben werden kann, wobei dieses bewegliche Kontaktelement eine Kabelaufnahme (9; 27) zur Einführung eines Elektrokabels (17) bildet,
    eine Druckfeder (14; 31), die in einen Raum eingesetzt ist, der zwischen einer Innenwand (15; 32) des Rahmens und einer Außenwand (13; 33) des beweglichen Kontaktelements ausgebildet ist, wobei diese Feder auf der der Schraube abgewandten Seite des Kontaktelements angeordnet ist und so das bewegliche Kontaktelement (7; 26) elastisch gegen das innere Ende der Schraube (5; 24) drückt, derart daß die Betätigung der Schraube in einer Richtung die Verschiebung des beweglichen Kontaktelements mit Spannung der Feder und die Betätigung der Schraube in der entgegengesetzter Richtung die Verschiebung des beweglichen Kontaktelements mit Entspannung der Feder bewirken,
    und eine, in der Nähe des in das bewegliche Kontaktelement (7; 26) eingeführten Elektrokabels (17) angeordnete ortsfeste Kontaktfläche (11; 30) umfaßt, derart daß die Betätigung der Schraube in der die Verschiebung des beweglichen Kontaktelements mit Entspannung der Feder bewirkenden Richtung das Einklemmen des Kabels zwischen dem beweglichen Kontaktelement (7; 26) und der ortsfesten Kontaktfläche (11; 30) bewirkt, wobei die Klemmkraft durch die Federkraft der Feder gegeben ist, und daß die Betätigung der Schraube in der die Verschiebung des beweglichen Kontaktelements mit Spannung der Feder bewirkenden Richtung die Freigabe des Kabels aus der Lage zwischen dem beweglichen Kontaktelement und der ortsfesten Kontaktfläche bewirkt, wobei die ortsfeste Kontaktfläche (11; 30) als Teil des Rahmens (3; 22) ausgebildet ist.
  2. Anschlußklemme nach Anspruch 1, dadurch gekennzeichnet, daß die ortsfeste Kontaktfläche (11) durch eine im Rahmen (3) ausgebildete Öffnung (11) gebildet wird und daß das Kabel mit einem gewissen Spiel gleichzeitig durch die Öffnung (11) des Rahmens (3) und die Kabelaufnahme (9) des beweglichen Kontaktelements (7) geführt wird.
  3. Anschlußklemme nach Anspruch 1, dadurch gekennzeichnet, daß die ortsfeste Kontaktfläche (30) als Teil eines feststehenden Kontaktstegs (28) ausgebildet ist, der teilweise in eine Kabelaufnahme (27) des beweglichen Kontaktelements (26) hineinragt und fest mit dem Rahmen (22) verbunden ist.
  4. Anschlußklemme nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schraube (5; 24) einen Anschlag aufweist, der ihre Drehung blockiert, wenn sie axial bis in eine Lage verschoben ist, in der sie nicht mit dem beweglichen Kontaktelement in Berührung steht.
  5. Anschlußklemme nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schraube (5; 24) ein Anzeigeelement aufweist, damit durch Sichtprüfung festgestellt werden kann, ob die Schraube angezogen oder gelöst ist.
  6. Anschlußklemme nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schraube (5; 24) mit Linksgewinde ausgeführt ist, damit sie im Uhrzeigersinn verdreht wird, um das Festklemmen des Kabels zu bewirken.
EP19930420388 1992-10-05 1993-09-29 Anschlussklemme für Elektrogeräte Expired - Lifetime EP0592336B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211985 1992-10-05
FR9211985A FR2696584B1 (fr) 1992-10-05 1992-10-05 Borne de raccordement pour appareillage électrique de puissance.

Publications (2)

Publication Number Publication Date
EP0592336A1 EP0592336A1 (de) 1994-04-13
EP0592336B1 true EP0592336B1 (de) 1997-07-16

Family

ID=9434302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420388 Expired - Lifetime EP0592336B1 (de) 1992-10-05 1993-09-29 Anschlussklemme für Elektrogeräte

Country Status (3)

Country Link
EP (1) EP0592336B1 (de)
DE (1) DE69312202T2 (de)
FR (1) FR2696584B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9503646D0 (sv) * 1995-10-18 1995-10-18 Pacesetter Ab Don för fixering av en ändanslutning hos en elektrisk ledare
FR2798514B1 (fr) * 1999-09-15 2001-11-02 Schneider Electric Ind Sa Borne de raccordement a cage elastique
DE19962289A1 (de) * 1999-12-23 2001-06-28 Abb Patent Gmbh Anschlussklemmenanordnung für ein elektrisches Installationsgerät
DE102010032522A1 (de) 2010-07-28 2012-02-02 Siemens Aktiengesellschaft Klemmanordnung für einen Leistungsschalter in Federzugtechnik
FR2997237B1 (fr) 2012-10-23 2014-11-21 Schneider Electric Ind Sas Cage elastique pour borne de raccordement et borne comportant une telle cage
DE202016102669U1 (de) * 2016-05-19 2017-08-22 Würth Elektronik eiSos Gmbh & Co. KG Kontaktierungsvorrichtung zur elektrischen Energieübertragung zu einer Leiterplatte
GB202006693D0 (en) 2020-05-06 2020-06-17 Technetix Bv Connector
DE102023000390B3 (de) 2023-02-08 2024-02-22 Sew-Eurodrive Gmbh & Co Kg Anschlussvorrichtung für einen elektrischen Leiter und Kontaktierungseinheit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212612B (de) * 1957-02-28 1966-03-17 Josef Eisert Schaltanlagen-Reihenklemmen
FR1534779A (fr) * 1967-06-02 1968-08-02 Wago Kontakttechnik Gmbh Serre-fil de sécurité pour conducteurs électriques
DE2248189C2 (de) * 1972-09-30 1974-11-14 Phoenix Elektrizitaetsgesellschaft H. Knuemann & Co, 4933 Blomberg Elektrische Verbindungsklemme
DE3332914A1 (de) * 1983-09-13 1985-04-04 Square D Starkstrom GmbH, 5277 Marienheide Anschlussklemme fuer niederspannungsanlagen, insbesondere schaltgeraete
DE3406081A1 (de) * 1984-02-20 1985-08-22 Siemens AG, 1000 Berlin und 8000 München Federdruckklemme fuer elektrische leiter

Also Published As

Publication number Publication date
DE69312202D1 (de) 1997-08-21
DE69312202T2 (de) 1998-01-02
FR2696584A1 (fr) 1994-04-08
FR2696584B1 (fr) 1994-12-02
EP0592336A1 (de) 1994-04-13

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