WO2021058562A1 - Dispositif de commutation électrique à base de fusible - Google Patents

Dispositif de commutation électrique à base de fusible Download PDF

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Publication number
WO2021058562A1
WO2021058562A1 PCT/EP2020/076565 EP2020076565W WO2021058562A1 WO 2021058562 A1 WO2021058562 A1 WO 2021058562A1 EP 2020076565 W EP2020076565 W EP 2020076565W WO 2021058562 A1 WO2021058562 A1 WO 2021058562A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector
electrical
fuse
switching device
case
Prior art date
Application number
PCT/EP2020/076565
Other languages
English (en)
Inventor
Franck Sarrus
Laetitia MILLEE
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 WO2021058562A1 publication Critical patent/WO2021058562A1/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
    • 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
    • H01H85/2045—Mounting means or insulating parts of the base, e.g. covers, casings
    • 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
    • H01H85/205—Electric connections to contacts on the base
    • 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
    • H01H85/205—Electric connections to contacts on the base
    • H01H2085/2055—Connections to bus bars in an installation with screw in type fuses or knife blade fuses
    • 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
    • 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
    • H01R4/02—Soldered or welded connections
    • H01R4/027—Soldered or welded connections comprising means for positioning or holding the parts to be soldered or welded

Definitions

  • 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, comprising:
  • case comprising a plurality of housings each configured to receive a fuse
  • each electrical connector being configured to connect an end terminal of the fuse when said fuse is inserted in said housing, each pair including an upstream connector and a downstream connector ;
  • each contact element configured to be connected to and end of a cable, each contact element being directly connected to a downstream connector and being placed in the case next to said downstream connector.
  • such a switching device may incorporate one or more of the following features, considered alone or according to any technically allowable combination:
  • the case includes outer walls and inner walls extending parallel to each other from a base portion of the case, the inner walls being placed between the opposed outer walls, each inner wall defining, with the closest neighboring outer wall, an elongated cavity configured to receive one of said cables, each elongated cavity including at least one contact element.
  • Each connector element includes a U-shaped or a V-shaped portion defining a reception zone for receiving an end of a cable.
  • One or more connector elements include a cage frame mounted on a main portion of the connector element, said cage frame defining, together with the main portion, a space for receiving a core portion of the cable.
  • the connector element is made of metal, such as copper.
  • 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 detailed representation of a portion of the switching device of Fig. 1 ;
  • FIG. 3 is a simplified representation of an electrical connector of the switching device of figure 1 according to a first 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.
  • a fuse-based electrical switching device 2 such as a fuse switch disconnector
  • 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 (upstream connector) 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.
  • a plurality of cables 14a, 14b and 14c are associated to the device 2 for connecting an electrical load to the device 2.
  • the device 2 is electrically connected between the electrical load and the electrical source.
  • said cables 14a, 14b and 14c are inserted in the device 2 through a suitable opening provided in a lower region 16 of the case 4.
  • the device 2 also includes a plurality of connector elements 18a, 18b and 18c.
  • Each connector element 18a, 18b, 18c is connected to one of the downstream connectors 10 (i.e., the other connector 10 of each pair of connectors 10).
  • Each cable 14a, 14b, 14c is fastened to a corresponding connector element 18a, 18b, 18c. Therefore, the electrical connection between each cable 14a, 14b, 14c and each corresponding downstream connector 10 is provided through a connector element 18a, 18b, 18c.
  • the connector elements 18a, 18b, 18c are placed in the case 4 next to the corresponding downstream connector 10.
  • the case 4 includes a main base portion 30 on which are mounted the conductors 10.
  • Two vertical outer side walls 32 extend perpendicularly from the lateral edges of the base portion 30 on both sides of the base portion 30.
  • the case 4 is made up from two or more separable parts and only the base part meant to be mounted on the electrical panel is actually shown. Additional parts, such as a front cover, are not illustrated on Fig. 2 but can nonetheless be associated to the base portion 30.
  • the rear face of the base portion 30 is mounted on an electrical panel and is facing the conductor bars 12a, 12b and 12c.
  • the case 4 also includes two inner vertical walls 34 located between opposite outer side walls 32.
  • the vertical walls 34 protrude from the base portion 30 and are parallel with the outer side walls 32.
  • the outer wall 32 and the closest neighboring inner wall 34 define an elongated cavity extending along the legth of the case 4 and being adapted to receive a cable 14a, 14b or 14c.
  • a first connector element 18a connected to the first downstream connector 10 associated to the first housing 6a is arranged in a first elongated cavity (e.g., on the left side of the case 4).
  • the cable 14a is received in said elongated cavity and its free end is fastened to the connector element 18a.
  • a the second connector element 18b connected to the second downstream connector 10 associated to the second housing 6b is arranged in a second elongated cavity (e.g., on the right side of the case 4).
  • the second cable 14b is received in said elongated cavity and its free end is fastened to the second connector element 18b.
  • a third conductor element 18c is connected to the third downstream connector 10c and is mounted on a central portion protruding from the base portion 30 between the first and second elongated cavities.
  • the third conductor element 18c thus lies in an elevated position above the first and second elongated cavities.
  • the third cable has its free end fastened to the third conductor element 18c. Due to the elevated position of the third conductor element 18c, the third cable 14c is not in contact with the cables 14a and 14c.
  • the downstream connector 10 is closer to the lower region 16 than the upstream connector 10, so as to reduce the length of the cables 14a, 14b and 14c.
  • FIG. 3 there is illustrated an example of a connector element 18a identified by the generic reference sign 18. This description of the connector element 18a is applicable to the other connector elements 18b and 18c.
  • Each connector element 18 includes a U-shaped or a V-shaped portion 40 defining a reception zone 42 for receiving an end of a cable 14a, 14b or 14c.
  • the portion 40 protrudes horizontally from a main portion 44 associated to a connection portion 46.
  • the latter is configured to be fastened to the corresponding downstream connector 10, for example by means of a suitable fastening element, such as a screw or a bolt.
  • connection portion 46 of the connector 18a is extending rightwards, since this connector 18a is meant to be inserted in the leftmost elongated cavity.
  • the connector element 18 is preferably made of metal, such as copper.
  • the connector elements 18 may further include a cage frame 48 mounted on the main portion 44.
  • a screw may be mounted on top of the cage frame 48 for selectively squeezing said cable 14a, 14b, 14c.
  • the cables 14a, 14b and 14c can be connected as close as possible to the downstream connectors 10. There is therefore no longer any need to provide a dedicated connection zone in the lower region of the case for attaching the cables and then provide dedicated internal contact bars between said downstream connectors and said connection zone. As a result, the amount of metal required to manufacture the device 2 is reduced. The cost of the device 2 is also reduced.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Fuses (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

L'invention concerne un dispositif de commutation électrique (2), comprenant : - Un boîtier comprenant une pluralité de logements (6a, 6b, 6c) chacun étant configuré pour recevoir un fusible (8) ; et - une pluralité de connecteurs électriques (10) associés par paires à chaque logement, chaque connecteur électrique étant configuré pour connecter une borne d'extrémité du fusible lorsque ledit fusible est inséré dans ledit logement, chaque paire comprenant un connecteur amont (10) et un connecteur aval (10) ; - une pluralité d'éléments de contact (18a, 18c) configurés chacun pour être relié à une extrémité d'un câble (14a, 14b), chaque élément de contact (18a, 18c) étant directement relié à un connecteur aval (10) et étant placé dans le boîtier à côté dudit connecteur aval.
PCT/EP2020/076565 2019-09-24 2020-09-23 Dispositif de commutation électrique à base de fusible WO2021058562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1910514A FR3101194B1 (fr) 2019-09-24 2019-09-24 Appareil de coupure électrique à fusible
FR1910514 2019-09-24

Publications (1)

Publication Number Publication Date
WO2021058562A1 true WO2021058562A1 (fr) 2021-04-01

Family

ID=69158036

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/076565 WO2021058562A1 (fr) 2019-09-24 2020-09-23 Dispositif de commutation électrique à base de fusible

Country Status (2)

Country Link
FR (1) FR3101194B1 (fr)
WO (1) WO2021058562A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040157503A1 (en) * 2002-12-24 2004-08-12 Sumitomo Wiring Systems, Ltd. Fuse connector and a terminal fitting for a connector
FR2875954A1 (fr) * 2004-09-27 2006-03-31 Mecelec Sa Connecteur de raccordement d'un conducteur de cable a un couteau de fusible ou de barreau conducteur et coffret de raccordement equipe d'un tel connecteur
EP2782115A1 (fr) * 2013-03-21 2014-09-24 Pronutec, S.A.U. Base de bloc de fusible

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040157503A1 (en) * 2002-12-24 2004-08-12 Sumitomo Wiring Systems, Ltd. Fuse connector and a terminal fitting for a connector
FR2875954A1 (fr) * 2004-09-27 2006-03-31 Mecelec Sa Connecteur de raccordement d'un conducteur de cable a un couteau de fusible ou de barreau conducteur et coffret de raccordement equipe d'un tel connecteur
EP2782115A1 (fr) * 2013-03-21 2014-09-24 Pronutec, S.A.U. Base de bloc de fusible

Also Published As

Publication number Publication date
FR3101194B1 (fr) 2021-11-19
FR3101194A1 (fr) 2021-03-26

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