WO2021058552A1 - Dispositif de commutation électrique à base de fusible - Google Patents

Dispositif de commutation électrique à base de fusible Download PDF

Info

Publication number
WO2021058552A1
WO2021058552A1 PCT/EP2020/076548 EP2020076548W WO2021058552A1 WO 2021058552 A1 WO2021058552 A1 WO 2021058552A1 EP 2020076548 W EP2020076548 W EP 2020076548W WO 2021058552 A1 WO2021058552 A1 WO 2021058552A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact portion
switching device
fuse
electrical
contact
Prior art date
Application number
PCT/EP2020/076548
Other languages
English (en)
Inventor
Jean-François OEUVRARD
Original Assignee
Mersen France Sb 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 Mersen France Sb Sas filed Critical Mersen France Sb Sas
Publication of WO2021058552A1 publication Critical patent/WO2021058552A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H85/203—Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals
    • H01H85/204—Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals for low voltage fuses with knife-blade end contacts
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/112—Resilient sockets forked sockets having two legs
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • 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
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H2085/2065—Bases for supporting the fuse; Separate parts thereof with base contacts adapted or adaptable to fuses of different lenghts; bases with self-aligning contacts; intermediate adaptation pieces

Definitions

  • TITRE Fuse-based electrical switching device
  • the present invention relates to a fuse-based electrical switching device.
  • Such devices generally include input and output terminals, as well as one or several removable fuse cartridges connected between said terminals through dedicated electrical connectors.
  • one aspect of the invention relates to a fuse-based electrical switching device with fuse, including:
  • case comprising at least one housing for receiving a fuse
  • Each electrical connector comprises a first contact portion and a second contact portion facing each other and delimiting a central reception zone for receiving said end terminal, the second contact portion being clamped to the first contact portion and including at least one clamp portion received in a corresponding opening formed in a lower region of the first contact portion.
  • the electrical contacts described above reduce the risk of faulty connection with the fuse. They are also easier and cheaper to manufacture, as they can be assembled without requiring additional connection elements such as a bolt or a screw.
  • such a switching device may incorporate one or more of the following features, considered alone or according to any technically allowable combination: -
  • the second contact portion includes a single clamp portion received in a single opening in the middle of the lower region of the first contact portion.
  • the second contact portion includes two or more clamp portions each received in a corresponding opening in the middle of the lower region of the first contact portion.
  • the opening is a through-opening.
  • Each clamp portion has a L-shaped cross section.
  • Each electrical connector includes a spring connected to rear faces of the first and second contact portions.
  • the second contact portion includes a spacer tab extending towards the first contact portion.
  • the first contact portion is made of one piece with a base portion of the electrical connector.
  • the first and second contact portions are made from metal.
  • the first and second contact portions include guide portions flaring towards the outside of the central receiving zone.
  • Each receiving housing includes at least two such electrical connectors.
  • the spacer tab has a length smaller than the distance separating the inner faces of the first and second contact portion when no return force is exerted by the spring.
  • the clamp portions are hooks or are hook shaped.
  • Fig. 1 is a simplified representation of a front view of a fuse-based electrical switching device according to embodiments of the invention
  • Fig. 2 is a simplified representation of an electrical connector of the switching device of figure 1 according to a first embodiment of the invention
  • Fig. 3 is a side view of the electrical connector of Fig. 2 viewed along the direction of arrow III on Fig. 2;
  • Fig. 4 is a simplified representation of an electrical connector of the switching device of figure 1 according to another embodiment of the invention.
  • Figure 1 illustrates a fuse-based electrical switching device 2, such as a fuse switch disconnector, configured to protect an electrical installation system against electrical faults.
  • the device 2 incudes one or several removable fuse cartridges each configured to interrupt an electric current exceeding a current rating.
  • the fuses are removable and can be disconnected by a user, preferably when no current is flowing, e.g. by hand or owing to an appropriate mechanism.
  • the device 2 may also include devices for extinguishing electrical arcs, so that users may remove one or several fuses even when an electrical current is flowing through the device.
  • the device 2 includes a case 4 made from an electrically insulating material, such as a polymer, preferably molded plastic.
  • the case 4 includes one or several housings 6a, 6b, 6c each configured to receive a fuse cartridge 8 (simply called “fuse” hereinafter).
  • the housings 6a, 6b, 6c are delimited by inner partitions arranged inside the case 4. These partitions can be formed in one piece with the outer body of the case 4.
  • the case 4 has a rectangular shape and the housings 6 are aligned vertically above one another along the length of the case 4.
  • the device 2 is connected to a three-phase electrical system and is adapted to receive three fuses 8, each fuse being associated to a phase of the electrical system.
  • the device 2 can be modified to operate with an electrical system comprising a different number of phases, such as a single-phase electrical system.
  • each fuse 8 includes a main body and two upstream and downstream connecting terminals 20 extending outside the body.
  • the main body has a slab shape or a cylinder shape.
  • the terminals 20 each have an elongated shape, such as the shape of a blade or the shape of a rod, and extend on either side of the main body along a same longitudinal direction.
  • the fuses 8 are low-voltage fuses as described in standard IEC/EN 60269-2-1.
  • fuses 8 are blade fuse, such as DIN NH-type fuse cartridges.
  • the device 2 may include, for each housing 6a, 6b, 6c, a movable cradle configured to hold a fuse cartridge 8.
  • the cradles may be connected to a fastening device connected to the case 4 so as to be pivotally movable relative to the case 4. These cradles are not visible in figure 1.
  • each cradle is movable between an open position, allowing the insertion or the removal of the fuse 8, and a closed position, in which the fuse 8 lies inside the corresponding housing.
  • the cradles are preferably mechanically linked to one another by an appropriate connecting mechanism, such as one or several levers, so that the opening and closing movements are simultaneous between all cradles of the device 2.
  • the device 2 also includes a plurality of electrical connectors 10 in order to connect the fuses 8 to the electrical system.
  • each housing 6 is associated with a pair of upstream and downstream electrical conductors 10.
  • the connectors 10 serve to connect the upstream and downstream terminals of each fuse 8 with a corresponding electrical line of the electrical system when said fuse 8 is installed in the corresponding housing.
  • connectors 10 according to aspects of the invention are described in more detail hereinafter.
  • the electrical installation includes three connecting bars 12a, 12b and 12c (also known as bus bars), each associated with an electrical phase.
  • the connecting bars 12a, 12b and 12c serve to distribute electrical power in the electrical system and are powered by an electric source.
  • one of the connectors 10 is electrically connected to a corresponding connecting bar 12a, 12b and 12c, for example using one or several electrically conductive parts mounted in the case 4.
  • connecting bars 12a, 12b and 12c are arranged in parallel and are vertically superimposed at a distance from one another within an electrical panel.
  • the device 2 is mounted vertically on the electrical panel while being connected to the connecting bars 12a, 12b and 12c on a rear face of the case 4.
  • the device also include conductors 14, such as cables, to connect the device 2 to an electric charge.
  • the conductors 14 are connected on a downstream connection zone 16 of the device 2 here formed on a lower part of the case 4.
  • the other connector 10 (downstream connector) of each pair is electrically connected to one of the conductors 14 by a contact bar 18a, 18b, 18c installed inside the device 2 and which connects said connector 10 to a corresponding conductor 14 via the connection zone 16.
  • each of the contact bars 18a, 18b, 18c extends in the case 4 inside a lateral compartment along one or several housings 6.
  • the contact bars 18a, 18b, 18c are preferably made from metal, such as copper or aluminum.
  • each electrical connector 10 is electrically connected to an upstream or downstream electrical connecting element of the switch 2.
  • the connectors 10 of each pair are arranged vertically above one another in each housing.
  • the upstream and downstream terminals 20 of the fuse 8 are respectively connected to the upstream and downstream connectors 10 of this housing, as illustrated for the housing 6a of figure 1.
  • Figs. 2 and 3 show a first embodiment of a connector 10 according to aspects of the invention.
  • the connector 10 includes a first contact portion 30 and a second contact portion 32 facing each other and delimiting a central reception zone 40 for receiving an end terminal 20 of the fuse 8.
  • first and second contact portions 30, 32 are flat plates made from an electrically conductive material.
  • the first and second contact portions 30, 32 are arranged parallel to each other and spaced apart with a width essentially equal to the width of the terminal 20 (e.g., a width equal to the width of the terminal 20 to within 10%).
  • first and second contact portions 30, 32 are metal plates.
  • the first and second contact portions 30, 32 are in direct contact with the terminal 20 so as to provide an electrical connection between the fuse 8 and the connector 10.
  • the second contact portion 32 is clamped to the first contact portion 30 and includes at least one clamp portion 34 received in a corresponding opening 38 formed in a lower region 36 of the first contact portion 30.
  • the second contact portion 32 includes two or more such clamp portions 34 and the first contact portions includes as many corresponding openings 38 in the lower region 36.
  • the lower region includes two such openings 38 formed on opposite lateral edges of the first contact portion 30.
  • the first contact portion 30 and includes two such clamp portions 34, arranged on opposite lateral edges of the second portion 32, each clamp portion 34 being received in one of said openings 38.
  • the openings 38 have a square shape or a rectangle shape.
  • the openings 38 are through-openings, as visible on Fig. 2 and Fig. 3.
  • the or each clamp portion 34 is located at a lower end of the second contact portion 32.
  • the clamp portion 34 has a L-shaped cross section.
  • the clamp portion 34 includes a first part and a second part. The first part extends perpendicularly from an inner face of the first contact portion 30, said first part being received through the opening 38 when the second contact portion 32 is clamped on the first contact portion.
  • the second part extends downwards from the outer end of the first part and comes in abutment against the outer face of the first contact portion 30.
  • the second part extends at a right angle with the first part.
  • the second part acts as a stop tab preventing the removal of the clamp portion 34.
  • the clamp portions 34 are hooks or are hook shaped.
  • the first part and the second part are arranged so as to form a hook, as visible on Fig. 2.
  • the hook prevents the removal of the second contact portion 32 relative to the first contact portion 30.
  • the qualifiers « inner » and « outer » used in reference to the faces of the first and second contact portions 30 and 32 are defined relative to the reception zone 40.
  • the inner face of said contact portions is turned towards the reception zone 40.
  • the clamp portions 34 together with the openings 38, provide a simple way to mount the second contact portion 32 on the first contact portion 30.
  • This mechanical connection does not require any fastening element such as a bolt or a screw and also provides the advantage that the second contact portion 32 can be slightly tilted relative to the first contact portion 30 so as to facilitate the insertion of the terminal 20 inside the receiving zone 40.
  • each electrical connector 10 includes a spring 42 connected to rear faces of the first and second contact portions 30, 32.
  • the spring 42 is shaped so as not to hinder the entry and exit of the terminal 20 in the receiving zone 40.
  • the spring 42 is configured to exert a return force laterally on the first and second contact portions 30 and 32 so as to bring them closer together. This forces the first and contact portions 30 and 32 to come in abutment against the terminal 20 when the latter is received in the reception region 40.
  • the spring 42 is made from a metallic material or an elastomer material.
  • the spring 2 can have a curved wire shape, although other shapes are possible.
  • the first and second contact portions 30, 32 respectively include guide portions 44, 46 flaring towards the outside of the central receiving zone 40 so as to guide the terminal 20 inside the receiving zone 40.
  • the second contact portion 32 may include a spacer tab 54 extending towards the first contact portion 30.
  • the spacer tab 54 protrudes from the edge or from the inner face of the second contact portion 32 and is adapted to come into contact with the inner face of the first contact portion 30 when both first and second contact portions 30, 32 are brought close enough to each other.
  • the spacer tab 54 has a length smaller than the distance separating the inner faces of the first and second contact portion 30, 32 when no return force is exerted by the spring 42.
  • the first contact portion 30 is made of one piece with a base portion 50 of the electrical connector 10.
  • the lower region 36 of the first contact member 30 is extended downwards by a twisted portion 48 connected to base portion 50.
  • the base portion 50 may include a connection zone 52 making it possible to fasten the connector 10 to a corresponding electrical connection element.
  • the connection zone 52 includes an orifice suitable for receiving a fastening member such as a screw or a bolt.
  • the first contact portion 30 and the base portion 50 manufactured by cutting a piece of metal from a metal sheet, said piece having an essentially elongated shape, and preferably a rectangle shape.
  • An upper portion of said piece of metal is twisted relative to a lower portion of said piece of metal in order to create the twisted portion 48 between the upper portion (corresponding to the first portion 30) and the lower portion (corresponding to the base portion 50), as shown on Fig. 2.
  • the lower portion can be folded to bend the base portion 50 with a right angle.
  • the base portion 50 is integrated into the end of one of the contact bars 18a, 18b, 18c (e.g., is made of one piece with said contact bar).
  • Fig. 4 shows a second embodiment of the connector 10, identified by the reference sign 10’.
  • This connector 10’ is similar to the connector 10 previously described, yet differs from it in that the second contact portion 32 includes a single clamp portion 34’ and the first contact portion 30 includes a single central opening in the middle of the lower region 36’ for receiving said clamp portion 34’. Aside from this difference, the description of the embodiments of the connector 10 is applicable to the connector 10’.
  • the second contact portion 32 is manufactured by cutting a piece of metal from a metal sheet to the desired size and then by folding a lower part of the cut piece in order to bend the first part and the second part of the clamp portion(s) 34 and, more specifically, to impart a hook shape to the clamp portion(s) 34. Then, the second contact portion 32 is mounted on the first contact portion 30 by inserting the clamp portion(s) 34 into the opening(s) 38. Optionally, the spring 42 is then mounted on the first and second contact portions 30 and 32.
  • the embodiments and alternatives considered above may be combined to lead to new embodiments.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un dispositif de commutation électrique, comprenant : - Un boîtier comprenant au moins un boîtier pour recevoir un fusible ; et au moins un connecteur électrique (10) associé audit boîtier pour connecter une borne d'extrémité d'un fusible lorsque ledit fusible est inséré dans le boîtier de réception ; chaque connecteur électrique (10) comprenant une première partie de contact (30) et une seconde partie de contact se faisant face et délimitant une zone de réception centrale (40) pour recevoir ladite borne d'extrémité, la seconde partie de contact étant serrée sur la première partie de contact et comprenant au moins une partie de serrage (34) reçue dans une ouverture correspondante (38) formée dans une région inférieure (36) de la première partie de contact (30).
PCT/EP2020/076548 2019-09-24 2020-09-23 Dispositif de commutation électrique à base de fusible WO2021058552A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1910513 2019-09-24
FR1910513A FR3101193B1 (fr) 2019-09-24 2019-09-24 Appareil de coupure électrique à fusible

Publications (1)

Publication Number Publication Date
WO2021058552A1 true WO2021058552A1 (fr) 2021-04-01

Family

ID=69158035

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/076548 WO2021058552A1 (fr) 2019-09-24 2020-09-23 Dispositif de commutation électrique à base de fusible

Country Status (2)

Country Link
FR (1) FR3101193B1 (fr)
WO (1) WO2021058552A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122765A1 (fr) * 2005-05-18 2006-11-23 Siemens Vdo Automotive Dispositif de connexion electrique pour l'insertion d'une fiche male de connexion d'un composant electronique tel que fusible ou relais
EP2744046A1 (fr) * 2012-12-17 2014-06-18 Nexans Connecteur de raccordement d'un conducteur de câble à un couteau de fusible ou de barreau conducteur
FR3036858A1 (fr) * 2015-06-01 2016-12-02 Michaud Sa Connecteur electrique et dispositif de raccordement electrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006122765A1 (fr) * 2005-05-18 2006-11-23 Siemens Vdo Automotive Dispositif de connexion electrique pour l'insertion d'une fiche male de connexion d'un composant electronique tel que fusible ou relais
EP2744046A1 (fr) * 2012-12-17 2014-06-18 Nexans Connecteur de raccordement d'un conducteur de câble à un couteau de fusible ou de barreau conducteur
FR3036858A1 (fr) * 2015-06-01 2016-12-02 Michaud Sa Connecteur electrique et dispositif de raccordement electrique

Also Published As

Publication number Publication date
FR3101193A1 (fr) 2021-03-26
FR3101193B1 (fr) 2021-10-08

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