EP4358308A1 - Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables - Google Patents

Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables Download PDF

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Publication number
EP4358308A1
EP4358308A1 EP22202254.3A EP22202254A EP4358308A1 EP 4358308 A1 EP4358308 A1 EP 4358308A1 EP 22202254 A EP22202254 A EP 22202254A EP 4358308 A1 EP4358308 A1 EP 4358308A1
Authority
EP
European Patent Office
Prior art keywords
terminal
electrical device
terminal cover
contact spring
cables
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.)
Pending
Application number
EP22202254.3A
Other languages
German (de)
English (en)
Inventor
Rosario IAPICHELLA
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 Schweiz AG
Original Assignee
ABB Schweiz AG
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 Schweiz AG filed Critical ABB Schweiz AG
Priority to EP22202254.3A priority Critical patent/EP4358308A1/fr
Publication of EP4358308A1 publication Critical patent/EP4358308A1/fr
Pending 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
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4828—Spring-activating arrangements mounted on or integrally formed with the spring housing
    • H01R4/4837—Single arrangement activating multiple springs
    • 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
    • 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
    • H01R11/03—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 characterised by the relationship between the connecting locations
    • H01R11/09—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 characterised by the relationship between the connecting locations the connecting locations being identical
    • 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
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/4819—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end the spring shape allowing insertion of the conductor end when the spring is unbiased
    • H01R4/4821—Single-blade spring
    • 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
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4828—Spring-activating arrangements mounted on or integrally formed with the spring housing
    • H01R4/4833—Sliding arrangements, e.g. sliding button
    • 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
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting

Definitions

  • the present invention relates to an electrical device for low-voltage electric systems, for example a switching device, a metering device or the like.
  • electrical devices for low-voltage systems e.g. circuit breakers, residual current devices, energy meters, or the like
  • circuit breakers e.g. circuit breakers, residual current devices, energy meters, or the like
  • terminal blocks for electrical and mechanical connection to the conductors of an electric line.
  • these terminal blocks are of the screwless type, i.e. they do not employ screws for connecting to the conductors of an electric line.
  • a terminal block of the screwless type includes a fixed electrode electrically connected to a corresponding conductive path of the electrical device and a contact spring mechanically cooperating with the fixed electrode to retain the cables of an electric line.
  • a user inserts the cables in the internal volume of the electrical device through suitable apertures in the outer casing and places the cable ends between the fixed electrode and the contact spring in such a way that this latter clamps the cables and exerts a suitable retaining force on the cable.
  • the user can carry out such a wiring operation without the use of mechanical tools if the cables to be inserted are sufficiently rigid. Otherwise, the user must insert a screwdriver in the internal volume of the electrical device through a dedicated slot of the outer casing and press the contact spring in such a way to move this latter away from the fixed electrode and obtain a suitable gap in which the ends of the inserted cables can be positioned.
  • the user must use a dedicated screwdriver, generally of the flat-blade type.
  • the user must tune suitably the angle of insertion of the screwdriver in the internal volume of the electrical device in order to intervene correctly on the contact spring without damaging other internal components.
  • the user must generally exert a relevant force to press the contact spring in order to move it away from the fixed electrode.
  • the present invention provides an electrical device according to the following claim 1 and the related dependent claims.
  • the electrical device of the invention comprises:
  • terminal block of the screwless type comprises:
  • each terminal block of the screwless type is mechanically coupled in a movable manner (preferably in a sliding manner) to said insulating housing, at said terminal port.
  • Said terminal cover is movable (preferably translationally movable), in a reversible manner, between a rest position and a pressed position.
  • Said terminal cover is configured to exert a force on said contact spring to move said contact spring away from the contact portion of said fixed electrode, when moving from said rest position to said pressed position.
  • said terminal cover moves from said rest position to said pressed position upon a pressure force exerted by user on said terminal cover.
  • said terminal cover comprises a manually operable pressure surface, at which said terminal cover can be operated by a user to move from said rest position to said pressed position.
  • said terminal cover moves from said pressed position to said rest position upon a release force exerted by said contact spring on said terminal cover, if at least a cable is not inserted between said contact spring and said contact portion, thereby being not mechanically connected to said terminal block.
  • said contact spring is formed by a bent laminar body having a blocked end anchored to a fixed point of said electrical device and one or more movable free ends opposite to said blocked end.
  • Each free end of said contact spring is configured to cooperate mechanically with the contact portion of said fixed electrode to clamp a corresponding cable passing through the through holes of the terminal cover and inserted between said free end and said contact portion.
  • said terminal cover is configured to couple mechanically to said contact spring in proximity of the movable free ends of said contact spring.
  • said terminal cover comprises:
  • the pushing portion of said terminal cover comprises one or more lateral surfaces configured to be in sliding contact with one or more cables passing through the through holes of said terminal cover.
  • said terminal cover comprises one or more first guiding surfaces mechanically coupled in a sliding manner with one or more second guiding surfaces of said insulating housing, at said terminal port.
  • the present invention relates to an electrical device 1 for low-voltage electric systems.
  • low-voltage refers to operating voltage levels lower than 1,5 kV AC and 2.0 kV DC.
  • the electrical device 1 may be any electrical device electrically and mechanically connectable to the conductors of an electric line.
  • the electrical device 1 is a switching device for low-voltage systems, for example a circuit-breaker, a residual current device, or the like.
  • the electrical device 1 can be a metering device, a detection device, a lighting device, or the like.
  • the electrical device 1 comprises an insulating housing 2 defining an internal volume of the electrical device.
  • the insulating housing 2 is conveniently made of an electrically insulating plastic material, for example a thermosetting or thermoplastic material.
  • the insulating housing 2 has preferably a cuboid shape with pairs of opposite walls and it may be formed by a plurality of shells (e.g. a base shell and a cover shell) mutually joined by means of screws or snap-fit arrangements.
  • shells e.g. a base shell and a cover shell
  • the electrical device 1 may include a number of manually operable user-interface arrangements that may be of known type, for example handles, buttons, micro-switches, or the like.
  • the insulating housing 2 comprises one or more terminal ports 21, each configured to allow the passage of one or more cables of an electric line in the internal volume of the electrical device.
  • Each terminal port 21 extends along a main longitudinal axis 500 ( figure 3 ) passing through the insulating housing 2 and puts in communication the internal volume of the electrical device with the outer environment.
  • each terminal port 21 is formed by a shaped pass-through hole (e.g. with a squared section) of the insulating housing 2.
  • the electrical device 1 comprises one or more terminal blocks 3 accommodated in the internal volume defined by the insulating housing 2.
  • Each terminal block 3 is arranged at a corresponding terminal port 21 of the insulating housing and it is configured to be electrically and mechanically connected with one or more cables of an electric line.
  • the electrical device 1 comprises a pair of terminal blocks 3 for each electric phase.
  • a terminal block is electrically connectable to an equivalent electric source while the other terminal block is electrically connectable to an equivalent electric load.
  • each terminal block 3 may be connected to one or two electric cables of an electric line.
  • the number of cables connected to each terminal block depends on how the electric line is arranged. In practice, if the electric line includes a single cable for each electric phase, a terminal block will be connected to one cable only whereas, if the electric line includes two cables in parallel for each electric phase, a terminal block may be connected to two cables.
  • one or more of the terminal blocks 3 of the electrical device 1 are of the screwless type, they are electrically and mechanically connectable to one or more electric cables without using screws or similar connecting means.
  • the electrical device 1 comprises a single group of terminal blocks 3 of the screwless type, which preferably includes terminal blocks (one for electric phase) electrically connectable to an equivalent electric source.
  • the terminal blocks 3 of the screwless type may be electrically connectable to an equivalent electric load.
  • the electrical device 1 may include multiple groups of terminal blocks 3 of the screwless type.
  • Each terminal block 3 of the screwless type comprises a fixed electrode 31 electrically connected to a conductive path of the electrical device (e.g. to a corresponding electric pole).
  • the fixed electrode 31 comprises a contact portion 311, at which it can be removably put in electrical contact with one or more electric cables 100.
  • the fixed electrode 31 is formed by a U-shaped conductive body (e.g. made of copper) fixed to the insulating housing 2.
  • the contact portion 311 is oriented in parallel to the main longitudinal axis of the terminal port 21, so that a cable 100 inserted through said terminal port can be easily put in electrical contact with the fixed electrode 31.
  • Each terminal block 3 of the screwless type additionally comprises a contact spring 32 operatively coupled to the fixed electrode 31.
  • the contact spring 32 is configured to cooperate mechanically with the contact portion 311 of the fixed electrode to clamp one or more cables 100 passing through the terminal port 21 and inserted between the contact spring 32 and the contact portion 311. In this way, the cables 100 are subject to a retaining force maintaining them in their operating position.
  • the contact spring 32 is formed by a bent laminar body (preferably conductive, e.g. made of steel), which has a blocked end 321 anchored to a fixed point of the electrical device (e.g. the fixed electrode 31) and one or more free ends 322 in an opposite position relative to the blocked end 321.
  • the laminar body of the contact spring 32 includes a second cutout 323 defining the free ends 322 of the contact spring ( figures 4 , 6 , 8-9 ).
  • the free ends 322 of the contact spring are movable in the sense that they can be bent at different bending angles relative to the blocked end 321.
  • the contact spring 32 is structurally integrated with the fixed electrode 31 in order to reduce the overall size of the terminal block 3.
  • the blocked end 321 of the contact spring is fixedly coupled to the fixed electrode 31 while the bent free ends 322 of the contact spring pass through the first cutout 313 of the fixed electrode and are oriented towards the contact portion 311.
  • the contact spring 32 comprises a pair of free ends 322 in such a way that the terminal block 3 can be connected to one or two cables of an electric line.
  • each free end 322 of the contact spring 32 is configured to cooperate mechanically with the contact portion 311 of the fixed electrode 31 to clamp a corresponding cable 100 passing through the terminal port 21 of the insulating housing and inserted between said free end and said contact portion.
  • Figures 3-4 show a terminal block 3 of the screwless type when no cables are inserted through the corresponding terminal port 21.
  • the contact spring 32 is in a pre-loaded condition (due to the elastic force stored by its bent laminar body) and it has the free ends 322 positioned in proximity of (or resting against) the contact portion 311.
  • Figures 5-6 show a terminal block 3 of the screwless type when a single cable 100 is inserted through the corresponding terminal port 21.
  • a free end 322B of the spring contact 32 is still in a pre-loaded condition as described above while the other free end 322A is bent separately and exerts a clamping force on a corresponding cable 100 inserted between this free end and the contact portion 311.
  • Each terminal block 3 of the screwless type further comprises a terminal cover 33 arranged at the terminal port 21 and having one or more through holes 330 to allow the passage of one or more cables 100 through the terminal port.
  • the terminal cover 33 comprises a pair of through holes 330 in such a way that the terminal block 3 can be connected to one or two cables of an electric line.
  • the terminal cover 33 is formed by a shaped body of electrically insulating material. According to an essential aspect of the invention, the terminal cover 33 is mechanically coupled in a movable manner to the insulating housing 2 at the corresponding terminal port 21.
  • the terminal cover 33 is slidingly coupled to the insulating housing 2 so as to be movable relative to this latter.
  • the terminal cover 33 is movable, in reversible manner, with respect to the insulating housing 2 between a rest position A and a pressed position B.
  • the terminal cover 33 is translationally movable relative to the insulating housing 2. At the rest position A, the terminal cover 33 is mechanically coupled to the contact spring 32 and maintains this latter in a pre-loaded condition.
  • the terminal cover 33 When moving from the rest position A to the pressed position B, the terminal cover 33 is configured to exert a force (preferably a pressing force) on said contact spring, which is directed in such a way to move the contact spring 32 away from the contact portion 311 of the fixed electrode 31.
  • a force preferably a pressing force
  • an extended gap is formed between the contact portion 311 of the fixed electrode and the contact spring 32 (namely the free ends 322 thereof). The presence of such an extended gap allows the insertion of the cables 100 between the contact portion 311 and the contact spring 32 or the extraction of said cables.
  • the terminal cover 33 moves from the rest position A to the pressed position B upon a pressure force exerted by user on the terminal cover 33.
  • a user can conveniently use a mechanical tool, such as a screwdriver.
  • the terminal cover 33 comprises a manually operable pressure surface 333, at which it can be operated by a user through a mechanical tool to move from the rest position A to the pressed position B.
  • the manually operable pressure surface 333 is shaped so that a user can employ mechanical tools of different type (a screw-driver of the flat-blade type or a Phillips screwdriver) to operate the terminal cover 33 (i.e. to exert a pressure force on it).
  • mechanical tools of different type a screw-driver of the flat-blade type or a Phillips screwdriver
  • the terminal cover 33 moves from the pressed position B to the rest position A upon a release force exerted by the contact spring 32 on said terminal cover, if at least a cable is not inserted in the terminal block.
  • the terminal cover 33 can slide with respect to the insulating housing 2 by moving in a translational manner along a direction parallel to the main longitudinal axis of the corresponding terminal port 21 of the insulating housing 2.
  • the terminal cover 33 comprises one or more first guiding surfaces 336 mechanically coupled in a sliding manner with one or more second guiding surfaces 20 of the insulating housing 2, at the said terminal port 21 ( figures 8 and 9 ).
  • the terminal cover 33 abuts against one or more stop portions 20A of the second guiding surfaces 20 of the insulating housing 2.
  • the rest position A of terminal cover 33 corresponds to an end-of-run position.
  • the length of the path between the rest position A and the pressed position B of the terminal cover 33 is designed in such way that the terminal cover 33 can suitably maintain the spring contact 32 is in a pre-loaded condition, when it is in the rest position A.
  • the terminal cover 33 may be arranged in such a way to be rotatable (at least partially) relative to the insulating housing 2.
  • the terminal cover 33 may be arranged in such a way to slide with respect to the insulating housing 2 and move in a rotational manner about an axis perpendicular to the main longitudinal axis of the corresponding terminal port 21 of the insulating housing 2.
  • the terminal cover 33 is configured to couple to the contact spring 32 in proximity of the free ends 322 of said contact spring. This solution is particularly advantageous as it allows decreasing the force to be applied on the contact spring 32 to overcome the elastic force of this latter and bring it in a pressed condition.
  • the terminal cover 33 is formed by a shaped body of electrically insulating material, which preferably has a mushroom structure.
  • the terminal cover 33 comprises an outer portion 331 and a pushing portion 332, which are preferably joined together to form a single piece.
  • the outer portion 331 of the terminal cover 33 is configured to obstruct partially the corresponding terminal port 21.
  • the outer portion 331 comprises an outer surface 331A (facing the outer environment), which extends flush with the outer surface 20C of the insulating housing 2, when the terminal cover 33 is in the rest position A ( figures 3 , 4 and 6 ).
  • the outer portion 331 of the terminal cover 33 has the above-mentioned one or more through holes 330, in which one or more corresponding cables of an electric line can be inserted.
  • the through holes 330 conveniently extend between the outer surface 331A and an inner surface 331B (facing the internal volume of the electrical device) of the outer portion 331 in parallel to the main longitudinal axis of the terminal port 21 ( figure 3 ).
  • the outer portion 331 comprises a grooved region 333A including the above-mentioned manually operable pressure surface 333 ( figures 4 and 6 ).
  • the outer portion 331 comprises a pair of lateral protrusions 336A including the above-mentioned first guiding surfaces 336.
  • the lateral protrusions 336A are mechanically coupled in a sliding manner with corresponding lateral grooves 20B of the insulating housing 2, which include the above-mentioned second guiding surfaces 20. In this way, the terminal cover 33 can slide with respect to the insulating housing 2 as described above.
  • terminal cover 33 When the terminal cover 33 reaches a rest position A, its lateral protrusions 336A abut against the portions 20A of the second lateral surfaces 20 of lateral grooves 20B of the insulating housing 2. The terminal cover 33 thus is in an end-of-run position when it is in the rest position A.
  • the pushing portion 332 of the terminal cover 32 protrudes from the outer portion 331 and it extends towards the internal volume of the electrical device, conveniently along the main longitudinal axis of the corresponding terminal port 21 of the insulating housing 2.
  • the pushing portion 332 In a distal position relative to the outer portion 331, the pushing portion 332 has a free end 335 configured to couple mechanically with the contact spring 32, preferably in proximity of the movable free ends 322 of said contact spring.
  • the pushing portion 332 comprises one or more lateral surfaces 334 configured to be in sliding contact with the cables 100 inserted in the internal volume of the electrical device through the holes 330 of the terminal cover 33.
  • the lateral surfaces 334 of the pushing portion 332 extends along the pushing portion 332 with a rounded profile in such a way to favor the insertion of the cables 100 through the holes 330.
  • a screwless terminal block 3 is supposed to be electrically and mechanically connected to a single cable 100 of an electric line, which is inserted in the internal volume of the electrical device through a corresponding hole 330 of the terminal cover 33 ( figures 5-6 ).
  • the terminal cover 33 is in a rest position A while the cable 100 is placed between a corresponding free end 322A of the contact spring 32 and the contact portion 311 of the fixed electrode.
  • the user can push the terminal cover 33 by means of a mechanical tool (e.g. a screwdriver - not shown). This latter is conveniently positioned at the manually operable pressure surface 333 of the terminal cover.
  • a mechanical tool e.g. a screwdriver - not shown.
  • the terminal cover 33 moves translationally from the rest position A to the pressed position B by sliding along the second guiding surfaces 20 of the insulating housing 2 ( figures 7-9 ).
  • the terminal cover 33 When moving to the pressed condition B, the terminal cover 33 exerts, through its pushing portion 332, a pressing force on the contact spring 32.
  • the free ends 322 of the contact spring 32 are moved away from the contact portion 311 of the fixed electrode 31.
  • the free end 322A thus decouples from the cable 100, which is no more subject to a retaining force and it can be easily extracted manually by the user ( figure 7 ).
  • a screwless terminal block 3 has to be wired with a cable 100 of the electric line.
  • the cable 100 can be inserted in the internal volume of the electrical device through a corresponding hole 330 of the terminal cover 33 ( figures 3-4 ).
  • the cable 100 can be directly inserted between a corresponding free end 322 of the contact spring 32 and the contact portion 311 of the fixed electrode 31. To this aim, it is enough to push suitably the cable 100 without pressing the terminal cover 33.
  • the user has to push the terminal cover 33 by means of a mechanical tool in such a way to move this latter from the rest position A to the pressed position B ( figure 7-9 ).
  • the pushing portion 332 of the terminal cover thus exerts a pressing force on the contact spring 32 so that the free ends 322 of the contact spring 32 are moved away from the contact portion 311 of the fixed electrode 31.
  • a gap is thus formed between the free ends 322 of the contact spring 32 and the contact portion 311 of the fixed electrode.
  • the user can thus insert the cable 100 through a corresponding hole 330 of the terminal cover 33 and place such a cable between a corresponding free end 322A of the contact spring 32 and the contact portion 311 of the fixed electrode ( figure 7 ).
  • the free end 322A of the contact spring 32 can clamp the cable 100 against the contact portion 311 of the fixed electrode while the other free end 322B of the contact spring 32 is no more subject to a pressing force and it returns in a pre-loaded condition in proximity of the contact portion 311 of the fixed electrode. While making such a return movement, the free end 322B of the contact spring 322 pushes the terminal cover 33 from the pressed position B to the rest position A.
  • the wiring and wire-removal operations of the screwless terminal blocks are greatly facilitated compared to the traditional devices of the state of the art.
  • the wire-removal operations can be carried out efficiently and quickly without the risk of damaging the internal components of the electrical device and the need of exerting an excessively strong force with the mechanical tool.
  • the insertion of mechanical tools in the internal volume of the electrical device is no more needed for carrying out the above-mentioned wiring and wire-removal operations of the screwless terminal block.
  • the contact spring 32 can thus be pressed easily without having to tune the position of the mechanical tool and without using a dedicated mechanical tool.
  • Mechanical tools of different types e.g. a screwdriver of the flat-blade type or the Phillips type
  • the electrical device of the invention has proven to be easy to manufacture industrially, at competitive costs compared to currently available electrical devices of the state of the art.

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  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP22202254.3A 2022-10-18 2022-10-18 Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables Pending EP4358308A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22202254.3A EP4358308A1 (fr) 2022-10-18 2022-10-18 Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22202254.3A EP4358308A1 (fr) 2022-10-18 2022-10-18 Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables

Publications (1)

Publication Number Publication Date
EP4358308A1 true EP4358308A1 (fr) 2024-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22202254.3A Pending EP4358308A1 (fr) 2022-10-18 2022-10-18 Dispositif électrique pour systèmes basse tension avec couvercle mobile et ressort de contact pour le serrage des cables

Country Status (1)

Country Link
EP (1) EP4358308A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899818B1 (fr) * 1997-08-25 2002-11-27 Phoenix Contact GmbH & Co. KG Borne de connexion électrique, notamment pour utilisation sur des plaques de circuits imprimés
US20070178747A1 (en) * 2006-02-02 2007-08-02 Phoenix Contact Gmbh & Co. Kg Electrical terminal
EP2728605A1 (fr) * 2012-11-06 2014-05-07 ABB S.p.A. Dispositif de commutation électrique de circuits basse tension
EP3633707A1 (fr) * 2018-10-04 2020-04-08 ABB S.p.A. Dispositif d'accessoire pour dispositifs de commutation basse et moyenne tension
US11387580B2 (en) * 2018-03-13 2022-07-12 Weidmüller Interface GmbH & Co. KG Spring force terminal for conductors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899818B1 (fr) * 1997-08-25 2002-11-27 Phoenix Contact GmbH & Co. KG Borne de connexion électrique, notamment pour utilisation sur des plaques de circuits imprimés
US20070178747A1 (en) * 2006-02-02 2007-08-02 Phoenix Contact Gmbh & Co. Kg Electrical terminal
EP2728605A1 (fr) * 2012-11-06 2014-05-07 ABB S.p.A. Dispositif de commutation électrique de circuits basse tension
US11387580B2 (en) * 2018-03-13 2022-07-12 Weidmüller Interface GmbH & Co. KG Spring force terminal for conductors
EP3633707A1 (fr) * 2018-10-04 2020-04-08 ABB S.p.A. Dispositif d'accessoire pour dispositifs de commutation basse et moyenne tension

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