EP3624270A1 - Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst - Google Patents

Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst Download PDF

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Publication number
EP3624270A1
EP3624270A1 EP19183778.0A EP19183778A EP3624270A1 EP 3624270 A1 EP3624270 A1 EP 3624270A1 EP 19183778 A EP19183778 A EP 19183778A EP 3624270 A1 EP3624270 A1 EP 3624270A1
Authority
EP
European Patent Office
Prior art keywords
cage
screw
aforementioned
terminal
terminal according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19183778.0A
Other languages
English (en)
French (fr)
Other versions
EP3624270B1 (de
Inventor
Daniel Vanzetto
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 Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Industries SAS filed Critical Schneider Electric Industries SAS
Priority to PL19183778T priority Critical patent/PL3624270T3/pl
Publication of EP3624270A1 publication Critical patent/EP3624270A1/de
Application granted granted Critical
Publication of EP3624270B1 publication Critical patent/EP3624270B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw
    • 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
    • H01R13/64—Means for preventing incorrect coupling
    • 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
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
    • 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
    • H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/2416—Means for guiding or retaining wires or cables connected to terminal blocks

Definitions

  • the present invention relates to a terminal for connecting an electrical conductor to a connection pad of an electrical appliance, such a terminal comprising a cage capable of being fixed inside the housing of the appliance and comprising a shaped orifice substantially parallelepiped delimited by four walls, this orifice being able to receive the aforementioned range, one of the aforementioned walls of the cage comprising an orifice capable of allowing the passage of a screw, said screw having at one of its ends located outside the cage, means for actuating said screw, and at its opposite end, a clamping pad capable of allowing the conductor to be clamped between the aforementioned area and said pad during actuation of the screw in the tightening direction causing the relative translational movement between the screw and the cage.
  • the present invention also relates to an electrical protection device comprising such a terminal.
  • the electrical connection of power cables to the circuit breaker connection areas is a recurring concern for questions of safety of people and goods.
  • the devices are sometimes tightened intuitively by a less and less qualified workforce.
  • it is necessary to carry out tightening campaigns intended to ensure compliance with the tightening torques recommended by the manufacturers.
  • the present invention solves this problem and proposes a connection terminal making it possible to carry out, in a simple and economical manner, tightening to the correct torque of the conductor in the terminal, as well as an electrical protection device comprising such a terminal.
  • connection terminal of the kind mentioned above, this terminal being characterized in that it comprises an intermediate stage created inside the cage so as to allow the housing of a nut. with elastic branches comprising a threaded orifice through which the clamping screw is intended to be mounted screwed, said elastic branches cooperating with shapes provided on the side walls of the cage so that the nut disengages in rotation when screwed from reaching the right tightening torque, and engaging from start to finish.
  • the two elastic branches are able to compress radially when screwed on slopes belonging to the cage, the torque resulting from the compression of the branches opposing the tightening torque of the screw, until these branches escape the slopes as soon as the desired tightening torque is reached.
  • this terminal includes means for producing a clicking noise from the aforementioned exhaust of the branches of the slopes.
  • the aforementioned nut comprises an annular part comprising the orifice for the passage of the aforementioned screw, and from which two elastic branches extend extending circumferentially around this annular part in respectively two opposite directions.
  • each branch has at its free end a hooking element capable of cooperating with two hollow shapes, respectively first and second, provided on each side wall of the cage, each hook element cooperating with a hollow shape said first during tightening, and with a hollow shape called second, during loosening.
  • the above-mentioned first and second hollow shapes are produced by striking inside the side walls of the cage.
  • the two hollow shapes extend in a direction substantially perpendicular to the axis of the cage, the two hollow shapes of one of the side walls being arranged opposite the two hollow shapes on the other side wall.
  • each hollow shape called first comprises a surface portion forming a hooking slope located opposite the hollow shape called second of the same wall, the passage through this hooking slope for the element d 'hooking, to join the second hollow form, causing the aforementioned disengagement of the screw.
  • each hollow shape called second comprises, located opposite the hollow shape called first which is associated with it, a wall portion extending substantially perpendicular to the axis of the cage, and forming a stop d '' stop in rotation of the nut, during a unscrewing operation generating the clutch of the clamping screw from the start to the end of the unscrewing.
  • the aforementioned intermediate stage is formed by a mounted plate crimped inside the cage.
  • this plate has two pins said first able to be introduced respectively into two orifices belonging respectively to two edges respectively belonging to the two aforementioned side walls at the end of insertion of the plate in the cage, and two pins said second apt to be introduced by crimping the sheet of the plate into two orifices belonging respectively to the two edges of the side walls opposite to the previous ones.
  • the present invention also relates to an electrical protection device comprising at least one upstream terminal and / or at least one downstream terminal comprising the previously mentioned characteristics taken alone or in combination.
  • connection terminal B On the figure 10 , we see a cage C belonging to a connection terminal B according to the invention, this terminal being intended to be mounted and fixed inside an electrical protection device such as a low voltage circuit breaker, in order to allow the electrical connection of a connection pad 1 of this device to an electrical conductor 2 such as a power cable.
  • an electrical protection device such as a low voltage circuit breaker
  • this terminal B comprises a cage C of substantially parallelepiped shape formed by a metal part 3 comprising four parallel walls in pairs 4,5,6,7, respectively an upper wall 4, a lower wall 5, and two side walls 6,7, this assembly delimiting a through orifice 8 of substantially parallelepiped shape intended to receive the free end of the connection pad 1 of the device.
  • the upper wall 4 of this cage C has a smooth orifice 9 intended to allow the passage of a clamping screw 10, said screw 10 comprising at one 10a of its free ends, a part 10b intended to allow its actuation by means of a tool provided for this purpose, while its opposite end portion 10c comprises a so-called clamping pad 11 capable of coming to bear on the conductor to be connected, when the screw 10 is actuated, causing it to move in translation relative to the cage C in the direction of the cable 2. It will be noted that advantageously, this clamping pad 11 is fixed to the free end 10c of the clamping screw 10 by crimping.
  • the terminal B comprises on each of its side walls 6,7, and on each side of the cage C, notches or orifices 12,13,14,15 intended to cooperate with a so-called intermediate plate 16, as illustrated on the figure 7 , during the introduction of this plate 16 inside the cage C.
  • this intermediate plate 16 preferably made of metal, comprises two lugs 17,18 called first able to be introduced first respectively in two notches 12,13 of the cage at the end of the introduction of the plate 16 in the cage C, as well as two so-called second lugs 19.20 able to be introduced then respectively into the two other notches or orifices 14, 15 of the cage C by crimping the sheet forming the so-called second lugs, this crimping making it possible to secure the intermediate plate 16 to the cage C.
  • This intermediate plate 16 also includes a smooth orifice 21 intended to be brought opposite the smooth orifice 9 of the upper wall 4 of the cage C when the plate 16 is fixed inside the cage C.
  • this terminal B also includes a piece called nut 22, made of an elastic material, and comprising an annular central portion 23 comprising a threaded orifice 24, this nut 22 being intended to be introduced into the cage C between the upper wall 4 of the cage C and the intermediate plate 16 so that the three orifices 9, 24, 21 respectively of the upper wall 4, of the nut 22 and of the intermediate plate 16 are aligned.
  • this nut 22 thus comprises an annular part 23 comprising the aforementioned threaded orifice 24, and two semi-circular branches 25, 26 each extending around the above-mentioned annular part 23 over approximately half of its outer circumference, these two branches 25, 26 extending from the outer surface of this annular part 23 while being connected to this surface at two points 23a, 23b ( fig. 2 ) radially opposite.
  • This nut 22 is mounted centered with respect to the cage C on the one hand, by the introduction of its annular part 23 into the orifice 9 of the upper wall 4 of the cage C, and on the other hand, by the compression exerted by the side walls 6,7 of the cage C on the branches 25,26.
  • the clamping screw 10 passes through the three orifices 9, 24, 21 provided respectively in the upper wall 4 of the cage C, in the nut 22, and in the intermediate plate 16, while being screwed into the threaded orifice 24 of the nut 22.
  • the terminal comprises a so-called friction ring 33 capable of being mounted around the annular part 23 of the nut 22 so as to be secured in rotation to this nut by means of recesses able to cooperate with portions of the nut.
  • This ring is interposed between this annular part and the cage and is intended to manage the friction between the different parts.
  • the two branches 25, 26 have come integrally with the annular part 23.
  • each side wall 6,7 has two clearances of materials 29,30 and 31,32 each forming a notch intended to cooperate with the hook elements 27,28 of the branches 25,26.
  • One of these notches 29, 31, said to be first, has a hooking slope in cross section, said notch comprising three portions of successive walls 29a, 29b, 29c, 31a, 31b, 31c forming a certain angle with respect to to the other.
  • the other of these notches 30, 32 has a L-shaped cross section, having a wall portion 30a, 32a substantially perpendicular to the side wall 6,7 of the cage C, and an elongated wall portion and curve 30c, 32c extending towards the inner part of the cage C.
  • the notches 29 to 32 of the two walls 6,7 are arranged in such a way that the notches called first 29 and second 30 of one 6 of the walls are arranged respectively opposite the notches 31,32 respectively said first and second of the other 7 of the walls 6.7.
  • the one 29c, 31c of the wall portions 29a, 29b, 29c and 31a, 31b, 31c of the so-called first notches 29, 31, located opposite the so-called second notch 30, 32, constitutes an attachment slope for the 'hook element 27,28 of the branches 25,26.
  • the figure 9 illustrates the terminal B in the tight position of the power cable 2.
  • the two elements forming a hook 27, 28 are located respectively in the two notches called seconds 30, 32, pressing against the face 30a, 32a of this notch forming stop which is perpendicular to the side wall 6,7.
  • terminal B is in the released position, no cables have yet been inserted inside, position shown on the Figures 13 and 14 .
  • these hook elements 27, 28 come into abutment on the portions 29c, 31c of the first notches 29, 31 situated on the side of the second notches 30, 32, called hooking slopes, then pass from the other side of these portions after bending of the branches 25, 26 by emitting a metallic click indicating the achievement of the correct tightening torque, position shown on the figure 15 .
  • a series of metallic clicks is heard. In this position, it is no longer possible to continue screwing because the nut 22 is no longer held firmly enough to constitute a screwing support.
  • the figure 16 represents all the possible angular positions of the nut 22 during its attachment or free release phases.
  • the screw In a), the screw is in the position of free rotation at the mid-point of the branches 25, 26, nothing which must protrude from the terminal.
  • the screw In b), the screw is in the docking position when the legs 25,26 are tightened clockwise.
  • the screw In c), the screw is in the docking position when the branches 25, 26 are unscrewed counterclockwise.
  • the screw is in the release position after snapping when the legs 25,26 are tightened in the clockwise direction or in an approach position when unscrewing in the counterclockwise direction.
  • a clamping terminal has therefore been produced in which an intermediate stage has been created by the insertion in the terminal of a sheet or plate and of a nut, this nut disengaging in rotation when screwed from the 'reaching the right tightening torque, and engaging when unscrewing, metal clicks can be heard when reaching the right tightening torque.
  • the cage no longer has a tapped hole, but has a single smooth hole.
  • the user can tighten the terminal without a torque wrench, with any tool.
  • the terminal no longer needs normative mechanical oversizing. It is possible to size the terminal parts as accurately as possible.
  • the volume of the terminal is unchanged.
  • the screw can be disengaged when unscrewed, for example with an electric screwdriver.
  • the shoe allows the tightening of two cables of different sections.
  • This terminal allows tightening to the correct torque using any 4mm hex tool in the user's toolbox.
  • the invention advantageously applies to the field of low voltage power circuit breakers, in particular molded case circuit breakers.
  • the tightening torque limitation function is integrated into the terminal. It no longer comes in the form of a tool or an accessory.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP19183778.0A 2018-09-13 2019-07-02 Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst Active EP3624270B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19183778T PL3624270T3 (pl) 2018-09-13 2019-07-02 Zacisk przyłączeniowy przewodu elektrycznego z podkładką przyłączeniową urządzenia elektrycznego i elektryczne urządzenie ochronne zawierające taki zacisk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1858204A FR3086114B1 (fr) 2018-09-13 2018-09-13 Borne de raccordement d'un conducteur electrique a la plage de raccordement d'un appareil electrique, et appareil de protection electrique comportant une telle borne

Publications (2)

Publication Number Publication Date
EP3624270A1 true EP3624270A1 (de) 2020-03-18
EP3624270B1 EP3624270B1 (de) 2021-06-23

Family

ID=65201401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19183778.0A Active EP3624270B1 (de) 2018-09-13 2019-07-02 Anschlussklemme eines elektrischen leiters an der klemmenleiste eines elektrischen geräts, und elektrisches schutzgerät, das eine solche klemme umfasst

Country Status (6)

Country Link
US (1) US10833430B2 (de)
EP (1) EP3624270B1 (de)
CN (1) CN110896015A (de)
ES (1) ES2880780T3 (de)
FR (1) FR3086114B1 (de)
PL (1) PL3624270T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112530753B (zh) * 2020-11-26 2023-02-03 广东电网有限责任公司清远供电局 一种接线端子及使用其的断路器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851651C (de) * 1943-06-10 1952-10-06 Busch Jaeger Luedenscheider Me Klemme mit federndem Kontaktdruck
US4027940A (en) * 1976-08-10 1977-06-07 Amerace Corporation Electrical connector with captive clamping jaw
EP0555157A1 (de) 1992-02-07 1993-08-11 Schneider Electric Sa Anschlussvorrichtung für einen Niederspannungsschalter mit Kunststoffgehäuse
DE4309198A1 (de) * 1993-03-22 1994-09-29 Maier & Cie C Anschlussklemme für ein Einbaugerät, insbesondere für einen Leitungsschutzschalter
FR2814595A1 (fr) * 2000-09-27 2002-03-29 Cahors App Elec Connecteur pour raccorder electriquement un cable principal avec un ou plusieurs cables derives
EP2725660A1 (de) * 2012-10-23 2014-04-30 Schneider Electric Industries SAS Elastisches Gehäuse für Anschlussklemme
EP3185368A1 (de) * 2015-12-24 2017-06-28 Hirose Electric Co., Ltd. Vorrichtung zum anbringen/entfernen eines endgeräts

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU464623B2 (en) * 1970-08-04 1975-09-04 Societe D'exploitation Des Procedes Marechal (Sepm) Electrical contact socket
US5021014A (en) * 1990-05-07 1991-06-04 Walter Gerard S Bus bar assembly
FR2798514B1 (fr) * 1999-09-15 2001-11-02 Schneider Electric Ind Sa Borne de raccordement a cage elastique
JP3622604B2 (ja) * 1999-11-19 2005-02-23 松下電工株式会社 接続変換装置
US6186839B1 (en) * 2000-02-25 2001-02-13 W. T. Storey Inc. Electrical connector
FR2986664B1 (fr) * 2012-02-03 2014-02-14 Abb France Borne de raccordement electrique
US10027039B1 (en) * 2017-05-02 2018-07-17 Bridgeport Fittings, Inc. Threadless grounding bushing with removable spacer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE851651C (de) * 1943-06-10 1952-10-06 Busch Jaeger Luedenscheider Me Klemme mit federndem Kontaktdruck
US4027940A (en) * 1976-08-10 1977-06-07 Amerace Corporation Electrical connector with captive clamping jaw
EP0555157A1 (de) 1992-02-07 1993-08-11 Schneider Electric Sa Anschlussvorrichtung für einen Niederspannungsschalter mit Kunststoffgehäuse
DE4309198A1 (de) * 1993-03-22 1994-09-29 Maier & Cie C Anschlussklemme für ein Einbaugerät, insbesondere für einen Leitungsschutzschalter
FR2814595A1 (fr) * 2000-09-27 2002-03-29 Cahors App Elec Connecteur pour raccorder electriquement un cable principal avec un ou plusieurs cables derives
EP2725660A1 (de) * 2012-10-23 2014-04-30 Schneider Electric Industries SAS Elastisches Gehäuse für Anschlussklemme
EP3185368A1 (de) * 2015-12-24 2017-06-28 Hirose Electric Co., Ltd. Vorrichtung zum anbringen/entfernen eines endgeräts

Also Published As

Publication number Publication date
US10833430B2 (en) 2020-11-10
FR3086114A1 (fr) 2020-03-20
PL3624270T3 (pl) 2021-12-13
CN110896015A (zh) 2020-03-20
FR3086114B1 (fr) 2020-09-04
US20200091625A1 (en) 2020-03-19
ES2880780T3 (es) 2021-11-25
EP3624270B1 (de) 2021-06-23

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