EP3893261B1 - Bras de contact de pôle pour une unité de pôle électrique - Google Patents

Bras de contact de pôle pour une unité de pôle électrique Download PDF

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Publication number
EP3893261B1
EP3893261B1 EP20168230.9A EP20168230A EP3893261B1 EP 3893261 B1 EP3893261 B1 EP 3893261B1 EP 20168230 A EP20168230 A EP 20168230A EP 3893261 B1 EP3893261 B1 EP 3893261B1
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EP
European Patent Office
Prior art keywords
pole
contact arm
terminal
unit
electric
Prior art date
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Active
Application number
EP20168230.9A
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German (de)
English (en)
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EP3893261A1 (fr
Inventor
Claudio CENCI
Gianluca Cortinovis
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
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ABB Schweiz AG
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Priority to EP20168230.9A priority Critical patent/EP3893261B1/fr
Priority to CN202120142783.2U priority patent/CN214626072U/zh
Publication of EP3893261A1 publication Critical patent/EP3893261A1/fr
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Publication of EP3893261B1 publication Critical patent/EP3893261B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators

Definitions

  • the present invention relates to the field of switching apparatuses for electric power distribution grids, such as circuit breakers, contactors, disconnectors and the like.
  • the present invention relates to an electric pole unit adapted to be arranged in a switching apparatus, particularly in a medium voltage switching apparatus.
  • MV intermediate voltage
  • apparatuses operating at voltages higher than 1 kV AC and 1.5 kV DC up to some tens of kV, e.g. up to 72 kV AC and 100 kV DC.
  • a switching apparatus comprises one or more electric pole units.
  • Document EP 3 093 866 discloses a device according to the preamble of claim 1.
  • an electric pole unit comprises a main body including a current breaking unit, pole terminals electrically connected to said current breaking unit and intended to be electrically connected to line conductors and an insulating housing enclosing said current breaking unit and said pole terminals.
  • an electric pole unit comprises also pole contact arms fixed to its main body.
  • Each pole contact arm is adapted to electrically connect a pole terminal with a corresponding line conductor.
  • a pole contact arm has a conductor element electrically and mechanically connected with a corresponding pole terminal and an insulating bushing enclosing said conductor element and mechanically coupled with a corresponding housing portion of the main body of the electric pole unit.
  • dielectric distances between the electric pole units of the switching apparatus are normally designed in such a way to prevent electric discharges between live parts, e.g. between the pole terminals of two adjacent pole units or between the pole terminals of a same electric pole unit or between an external conductor and a pole terminal.
  • a first solution to deal with this technical issue may consist in arranging one or more gasket elements at the mechanical junction between the insulating bushing of the pole contact arm and the corresponding housing portion of the main body of the electric pole unit in such a way to seal such a mechanical junction from a dielectric point of view.
  • Another solution to mitigate the above-mentioned technical problems may consist in covering (e.g. through a spraying or sputtering process) the coupling surfaces of the different insulating parts to be joined with a silicone material (e.g. a silicone foam) when said insulating parts are mechanically coupled.
  • a silicone material e.g. a silicone foam
  • the pole contact arms cannot be removed from the electric pole unit once they are assembled to the main housing of the electric pole unit. This circumstance may severely complicate possible maintenance interventions on the switching apparatus.
  • the manufacturing process of the electric pole unit becomes remarkably time consuming since it is necessary to wait for a relatively long time (e.g. 12-24 h) to obtain a suitable polymerization of the deposited silicone material.
  • said first bushing portion is made of a soft insulating material, an elastically deformable material.
  • said first bushing portion is subject to a deformation (preferably in an elastic manner) at one or more coupling surfaces when it couples with the corresponding housing portion and the corresponding pole terminal of the main body of the electric pole unit.
  • the (preferably elastic) deformation of said first bushing portion makes a mechanical junction, which is formed by said first bushing portion and said corresponding housing portion, dielectrically sealed, i.e. without air gaps or air paths between the outer environment and the conductive parts at said mechanical junction.
  • the above-mentioned elastically deformable material is an elastomeric material, e.g. a silicone rubber.
  • said first contact arm terminal comprises first contact arm coupling surfaces intended to couple with corresponding pole coupling surfaces of a pole terminal of said main body, when said pole contact arm is fixed to said main body.
  • said first bushing portion comprises second contact arm coupling surfaces intended to couple with corresponding pole coupling surfaces of a housing portion of the main body of said electric pole unit, when said pole contact arm is fixed to said main body.
  • said first bushing portion comprises third contact arm coupling surfaces intended to couple with corresponding pole coupling surfaces of a pole terminal of the main body of said electric pole unit, when said pole contact arm is fixed to said main body.
  • said insulating bushing is fully made of the above-mentioned elastically deformable material.
  • said conductor element and said insulating bushing form a monolithic structure.
  • said conductor element and said insulating bushing are co-molded to form said monolithic structure.
  • Another aspect of the invention relates to a switching apparatus, preferably a medium voltage switching apparatus, comprising an electric pole unit, according to the invention.
  • the present invention relates to a pole contact arm 10A, 10B for an electric pole unit 1 of a medium voltage (MV) switching apparatus 100.
  • MV medium voltage
  • Figure 1 shows a MV switching apparatus 100 incorporating a plurality of pole contact arms 10A, 10B according to the invention.
  • the MV switching apparatus 100 comprises a current breaking section including one or more pole units 1, an actuation section 101 including the actuation components (not shown) for moving the movable contacts of the electric pole units, and a base section 102 for mechanically supporting the electric pole units 1 and the actuation section 101.
  • the base section 102 may be conveniently mounted on a movable carriage.
  • the base section 102 extends parallel to a laying plane of the switching apparatus while the pole units 1 and the actuation section 101 extend perpendicularly with respect to aforesaid base section.
  • the switching apparatus 1 comprises an electric pole unit 1 for each electric phase of the electric power distribution grid, in which it is intended to be installed.
  • the switching apparatus 100 is of the multi-phase type, more particularly of the three-phase type.
  • it comprises three pole units 1, as shown in figure 1 .
  • Figures 2-3 , 6-9 show an electric pole unit 1 of a MV switching apparatus 100.
  • the electric pole unit 1 comprises a main body 1A adapted to be fixed (in a known manner) to the base section 102 of the switching apparatus.
  • the main body 1A of the electric pole unit 1 comprises a current breaking unit 2 arranged in an internal volume.
  • the breaking unit 2 comprises a fixed contact assembly 23 including at least a fixed contact 21 ( figures 3 , 6-7 ) and movable contact assembly 24 including at least a movable contact 22 ( figures 3 , 8-9 ).
  • the movable contact 22 is adapted to be coupled with or separated from the fixed contact 21, during a switching operation of the switching apparatus.
  • the main body 1A of the electric pole unit 1 comprises first and second pole terminals 3 and 4, which are electrically connected (in a known manner) to the fixed contact assembly 23 and to the movable contact assembly 24 of the current breaking unit 2, respectively.
  • the first pole terminal 3 is the end portion of a corresponding shaped conductive member (e.g. made of copper), which is electrically and mechanically coupled with the fixed contact assembly 23.
  • a corresponding shaped conductive member e.g. made of copper
  • the first pole terminal 3 has a cylindrical shape.
  • the first pole terminal 3 comprises first pole coupling surfaces 3A and second pole coupling surfaces 3B intended to couple with a conductor and an insulating bushing of a corresponding pole contact arm, respectively, when such pole contact arm is fixed to the main body 1A of the electric pole unit ( figures 6-7 ).
  • the first pole terminal 3 comprises a first coupling cavity 30 (e.g. a threaded cavity) intended to receive suitable coupling means (e.g. a screw) for mechanically and electrically coupling said pole terminal with a conductor of a corresponding pole contact arm.
  • suitable coupling means e.g. a screw
  • the second pole terminal 4 is the end portion of a corresponding shaped conductive member (e.g. made of copper), which is electrically and mechanically coupled with the movable contact assembly 23.
  • a corresponding shaped conductive member e.g. made of copper
  • the second pole terminal 4 has a cylindrical shape.
  • the second pole terminal 4 comprises third pole coupling surfaces 4A and fourth pole coupling surfaces 4B intended to couple with a conductor and an insulating bushing of a corresponding pole contact arm, respectively, when such pole contact arm is fixed to the main body 1A of the electric pole unit ( figures 8-9 ).
  • the second pole terminal 4 comprises a second coupling cavity 40 (e.g. a threaded cavity) intended to receive suitable coupling means (e.g. a screw) for electrically and mechanically coupling said pole terminal with a conductor of a corresponding pole contact arm.
  • suitable coupling means e.g. a screw
  • the main body 1A of the electric pole unit 1 further comprises an insulating housing 5 that encloses the breaking unit 2 and the pole terminals 3 and 4.
  • the insulating housing 5 defines an internal volume, in which the above-mentioned internal components of the electric pole unit are accommodated.
  • the insulating housing 5 is made of a relatively rigid insulating material, e.g. a thermoplastic material, such as polyamide or polycarbonate, or a thermosetting material, such as polyester or epoxy resins, and the like.
  • a relatively rigid insulating material e.g. a thermoplastic material, such as polyamide or polycarbonate, or a thermosetting material, such as polyester or epoxy resins, and the like.
  • the insulating housing 5 is formed by an elongated (e.g. cylindrical) hollow member of insulating material, which is fixed to the base section 102 of the switching apparatus.
  • the insulating housing 5 has a first housing port 51 at the first pole terminal 3. In this way, the first pole terminal 3 is accessible from outside.
  • the first housing port 51 has a substantially circular geometry.
  • the main insulating housing 5 conveniently comprises a first housing portion 53 defining the first housing port 51.
  • the first housing portion 53 is formed by a corresponding first shaped coupling edge of the insulating housing 5, which optionally has an ring shape and a tapered thickness with a rounded profile.
  • the first housing portion 53 is coaxial with the first pole terminal 3 and it is arranged in such a way that this latter slightly protrudes from the first housing port 51.
  • the first housing portion 53 comprises fifth pole coupling surfaces 53A (defining the above-mentioned first coupling edge) intended to couple with an insulating bushing of a corresponding pole contact arm, when such pole contact arm is fixed to the main body 1A of the electric pole unit ( figures 6-7 ).
  • the main insulating housing 5 has a second housing port 52, at which the second pole terminal 4 is made accessible from outside.
  • the second housing port 52 has a substantially circular geometry.
  • the insulating housing 5 conveniently comprises a second housing portion 54 defining the second housing port 52.
  • the second housing portion 54 is formed by a corresponding second shaped coupling edge of the insulating housing 5, which optionally has an ring shape and tapered thickness with a rounded profile.
  • the second housing portion 54 is coaxial with the second pole terminal 4 and it is arranged in such a way that this latter slightly protrudes from the second housing port 52.
  • the second housing portion 54 comprises sixth pole coupling surfaces 54A (defining the above-mentioned second coupling edge) intended to couple with an insulating bushing of a corresponding pole contact arm, when said pole contact arm is fixed to the main body 1A of the electric pole unit ( figures 8-9 ).
  • the electric pole unit 1 comprises a first pole contact arm 10A, according to the invention, which is fixed to the main body 1A for electrically connecting the first pole terminal 3 with a corresponding first line conductor, and a second pole contact arm 10B, according to the invention, which is fixed to the main body 1A for electrically connecting the second pole terminal 4 with a corresponding second line conductor.
  • Figures 4-5 , 6-7 show a pole contact arm 10A, 10B according to the invention, which is incorporated in an electric pole unit 1 of MV switching apparatus 100.
  • the pole contact arm 10A, 10B comprises a conductor element 11.
  • the conductor element 11 is formed by an elongated conductive member (e.g. made of copper).
  • the conductor element 11 has a tubular shape.
  • the conductor element 11 comprises first and second contact arm terminals 111, 112 that are preferably formed by the opposite ends of said conductive member.
  • the first contact arm terminal 111 of the conductor element 11 is adapted to electrically and mechanically couple with a corresponding pole terminal 3, 4 of the main body 1A of the electric pole unit 1.
  • the first contact arm terminal comprises first contact arm coupling surfaces 111A intended to couple with corresponding first pole coupling surfaces 3A of a first pole terminal 3 or with corresponding third pole coupling surfaces 4A of a second pole terminal 4, when the pole contact arm 10A, 10B is fixed to the main body 1A of the electric pole unit.
  • the conductor element 11 is provided with suitable coupling means 15 (e.g. a screw) at the first contact arm terminal 111.
  • the coupling means 15 are adapted to be coupled with a coupling cavity 30, 40 (e.g. a threaded cavity) of the corresponding pole terminal 3, 4 for electrically and mechanically coupling this latter with said conductor element.
  • the second contact arm terminal 112 of the conductor element 11 is intended to be electrically coupled (in a known manner) to a corresponding line conductor of an electric line.
  • a line conductor may be adapted to connect the electric pole unit with an electric power source or with an electric load.
  • the pole contact arm 10A, 10B comprises an insulating bushing 12 enclosing the conductor element 11.
  • the conductor element 11 and the insulating bushing 12 form a monolithic structure.
  • they may be conveniently co-molded through an industrial process of known type.
  • the insulating bushing 12 comprises a first contact arm port 121, at the first contact arm terminal 111. In this way, the first contact arm terminal 111 is accessible from outside.
  • the insulating bushing 12 conveniently comprises a first bushing portion 123 defining the first contact arm port 121.
  • the first bushing portion 123 is intended to mechanically couple with a corresponding housing portion 53 or 54 and with a corresponding pole terminal 3 or 4 of the main body 1A of the electric pole unit, when the pole contact arm 10A, 10B is fixed to said main body.
  • the first bushing portion 123 comprises second contact arm coupling surfaces 123A intended to couple with corresponding fifth pole coupling surfaces 53A of a first housing portion 53 of the insulating housing 5 or with corresponding sixth pole coupling surfaces 54A of a second housing portion 54 of the insulating housing 5, when the pole contact arm 10A, 10B is fixed to the main body 1A of the electric pole unit.
  • the second contact arm coupling surfaces 123A define a pass-through third coupling cavity 1230 adapted to receive the first housing portion 53 or the second housing portion 54 of the insulating housing 5, when the pole contact arm 10A, 10B is fixed to the main body 1A of the electric pole unit.
  • the third coupling cavity 1230 has a grooved ring shape and it is arranged coaxially with the first contact arm terminal 111 in such a way to define an outer region of the first contact arm port 121 (i.e. an ring region having a diameter larger than the diameter of the first pole contact 3 or the second pole contact 4).
  • the third coupling cavity 1230 has an outer diameter slightly shorter (of few mms) than the outer diameter of the first housing portion 53 or the second housing portion 54 of the insulating housing 5.
  • the third coupling cavity 1230 has a shape (e.g. with a squared profile) that does not fully fit with the shape (e.g. with a rounded profile) of the first housing portion 53 (namely the above-mentioned first coupling edge) or the second housing portion 54 (namely the above-mentioned second coupling edge).
  • the first housing portion 53 or the second housing portion 54 can be inserted into the third coupling cavity 1230 with a certain level of mechanical interference (either in radial and longitudinal direction).
  • the first bushing portion 123 comprises third contact arm coupling surfaces 123B intended to couple with corresponding second pole coupling surfaces 3B of a first pole terminal 3 or with corresponding fourth pole coupling surfaces 4B of a second pole terminal 4, when the pole contact arm 10A, 10B is fixed to the main body 1A of the electric pole unit.
  • the third contact arm coupling surfaces 123B define a blind fourth coupling cavity 1231 in cooperation with the first contact arm coupling surfaces 111A of the contact arm terminal 111.
  • the fourth coupling cavity 1231 is adapted to receive the first pole terminal 3 or the fourth pole terminal 4, when the pole contact arm 10A, 10B is fixed to the main body 1A of the electric pole unit.
  • the fourth coupling cavity 1231 is arranged coaxially with the first contact arm terminal 111 in such a way to define an inner circular region of the first contact arm port 121 (e.g. having a diameter corresponding to the diameter of the first pole terminal 3 or the second pole terminal 4).
  • the fourth coupling cavity 1230 has a shape (e.g. frustro-conical) that does not fully fit with the shape (e.g. cylindrical) of the of the first pole terminal 3 or the second pole terminal 4.
  • the first pole terminal 3 or the second pole terminal 4 can be inserted into the fourth coupling cavity 1231 with a certain level of mechanical interference (mainly in radial direction).
  • the insulating bushing 12 comprises a second contact arm port 122 (preferably with a circular shape) at the second contact arm terminal 112.
  • the insulating bushing 12 conveniently comprises a second bushing portion 124 defining the second contact arm port 122.
  • the second bushing portion 124 (preferably with a ring profile) surrounds the second contact arm terminal 112 and it is arranged in such a way that this latter protrudes from the second contact arm port 122.
  • An important aspect of the pole contact arm 10A, 10B according to the invention consists in that the first bushing portion 123 of the insulating bushing 12 is made of a relatively soft insulating material.
  • the expression "relatively soft insulating material” identifies an electrically insulating material that is softer than the electrically insulating materials normally used for this kind of applications, for example an electrically insulating material that is softer than the (relatively rigid) insulating material (e.g. of thermosetting or thermoplastic type) of the insulating housing 5 of the main body 1A.
  • such a soft insulating material is an elastically deformable material, for example an elastomeric material, e.g. a silicone rubber.
  • the insulating bushing 12 of the pole contact arm 10A, 10B is fully made of an elastically deformable material.
  • the first bushing portion 123 is made of a soft material (preferably elastically deformable) while the remaining portions of the insulating bushing 12 are made of a relatively rigid insulating material, similarly to the insulating housing 5 of the main body 1A of the electric pole unit.
  • the first bushing portion 123 Being made of a relatively soft material (preferably elastically deformable), the first bushing portion 123 is subject to a deformation (preferably elastic) when it mechanically couples with a corresponding housing portion 53, 54 (made of a relatively hard material) and a corresponding pole terminal 3, 4 of the main body 1A of the electric pole unit.
  • the deformation of the first bushing portion 123 makes the mechanical junction, which is formed by said first bushing portion and a corresponding housing portion 53, 54 of the main body 1A, dielectrically sealed, i.e. with no air gaps or air paths between the outer environment and the conductive parts at said mechanical junction (i.e. the conductor element 11 and the a corresponding pole terminal 3, 4).
  • the conductor element 11 of the pole contact arm 10A, 10B and the corresponding pole terminal 3, 4 of the main body 1A of the electric pole unit are therefore electrically insulated from the outer environment.
  • Figures 6-7 schematically show the assembly of the first pole contact arm 10A to the main body 1A of the electric pole unit.
  • the first housing portion 53 and the first pole terminal 3 of the main body 1A are inserted into the third and fourth coupling cavities 1230, 1231 of the first bushing portion 123 of the pole contact arm 10A.
  • the first housing portion 53 and the first pole terminal 3 of the main body 1A couple with the first bushing portion 123 and the first contact arm terminal 111 by means of a male-female coupling arrangement.
  • the first housing portion 53 and the first pole terminal 3 of the main body 1A form the corresponding male parts of this male-female coupling arrangement while the third and fourth coupling cavities 1230, 1231 of the first bushing portion 123 form the corresponding female parts of this male-female coupling arrangement.
  • the coupling means 15 of the pole contact arm 10A are inserted into the first coupling cavity 30 of the first pole terminal 3. In this way, the first pole contact arm 10A is firmly fixed to the main body 1A of the electric pole unit.
  • the assembly of the first pole contact arm 10A to the main body 1A of the electric pole unit causes a deformation (preferably elastic) of the first bushing portion 123, particularly at the coupling surfaces 123A, 123B.
  • the first housing portion 53 and the first pole terminal 3 of the main body 1A are in fact coupled to the first bushing portion 123 of the pole contact arm 10A (preferably with the third and fourth coupling cavities 1230, 1231 of this latter) with a certain level of mechanical interference.
  • the deformation of the first bushing portion 123 at the above-mentioned coupling surfaces 123A, 123B ensure a suitable dielectric sealing of the mechanical junction between the first pole contact arm 10A and the insulating housing 5 of the main body 1A of the electric pole unit 1.
  • the first pole terminal 3 and the first contact arm terminal 111 are thus electrically insulated with respect to the outer environment.
  • FIGS 8-9 schematically show the assembly of the second pole contact arm 10B to the main body 1A of the electric pole unit.
  • the second housing portion 54 and the second pole terminal 4 of the main body 1A are inserted into the third and fourth coupling cavities 1230, 1231 of the first bushing portion 123 of the pole contact arm 10A.
  • the second housing portion 54 and the second pole terminal 4 of the main body 1A couple with the first bushing portion 123 and the first contact arm terminal 111 by means of a male-female coupling arrangement.
  • the second housing portion 54 and the second pole terminal 4 of the main body 1A form the corresponding male parts of this male-female insert coupling arrangement while the third and fourth coupling cavities 1230, 1231 of the first bushing portion 123 form the corresponding female parts of this male-female insert coupling arrangement.
  • the coupling means 15 of the pole contact arm 10A are inserted into the second coupling cavity 40 of the second pole terminal 4. In this way, the second pole contact arm 10B is firmly fixed to the main body 1A of the electric pole unit.
  • the assembly of the second pole contact arm 10B to the main body 1A of the electric pole unit causes a deformation (preferably elastic) of the first bushing portion 123, particularly at the coupling surfaces 123A, 123B.
  • the second housing portion 54 and the second pole terminal 4 of the main body 1A are coupled to the first bushing portion 123 of the pole contact arm 10B (preferably with the third and fourth coupling cavities 1230, 1231 of this latter) with a certain level of mechanical interference.
  • the deformation of the first bushing portion 123 at the above-mentioned coupling surfaces 123A, 123B ensure a suitable dielectric sealing of the mechanical junction between the second pole contact arm 10B and the insulating housing 5 of the main body 1A of the electric pole unit 1.
  • the second pole terminal 4 and the first contact arm terminal 111 are thus electrically insulated with respect to the outer environment.
  • the pole contact arm 10A, 10B according to the invention provides remarkable advantages with respect to state of the art.
  • the pole contact arm 10A, 10B comprises at least a first bushing portion 123 made of insulating material (preferably elastically deformable) that is softer than the material of the insulating housing 5 (in particular of the insulating housing portions 53 and 54) of the main body 1A of the electric pole unit.
  • insulating material preferably elastically deformable
  • the pole contact arm 10A, 10B thus ensures a higher dielectric strength of the corresponding electric pole unit 1 at above-mentioned mechanical junctions.
  • the arrangement the first bushing portion 123 made of soft insulating material does not meaningfully complicate the manufacturing process of the electric pole unit 1.
  • the pole contact arm 10A, 10B may be mounted on the main body 1A according to a plug-in assembly mode and then firmly fixed to this latter by suitable coupling means 15, 30, 40.
  • the assembly of the pole contact arm 10A, 10B to the main body 1A of the pole contact unit can therefore be carried in a relatively easy and quick manner (comparably with most traditional electric pole units with no dielectric sealing arrangements) and it does not require special precautions for being carried out.
  • pole contact arm 10A, 10B may still be disassembled from the main body 1A of the electric pole unit in case of need, e.g. during maintenance interventions.
  • the pole contact arm 10A, 10B allows simplifying the assembly of electric pole units of switching apparatuses designed for installation in relatively small spaces.
  • the pole contact arm 10A, 10B of the invention is easy to manufacture at industrial level by means of standard industrial processes, e.g. co-moulding processes involving metal and plastic materials.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (8)

  1. Unité de pôle électrique (1) pour un appareil de connexion (100) comprenant :
    - un corps principal (1A) comprenant :
    - une unité de coupure de courant (2) positionnée dans le volume interne de ladite unité de pôle électrique ;
    - des première et seconde bornes de pôle (3, 4) connectées à ladite unité de coupure de courant ;
    - un boîtier isolant (5) constitué d'un matériau isolant rigide et entourant ladite unité de coupure (2) et lesdites première et seconde bornes de pôle (3, 4), ledit boîtier isolant comprenant des premier et second ports de réception (51, 52) sur lesdites première et seconde bornes de pôle (3, 4), respectivement, et des première et seconde parties de réception (53, 54) définissant lesdits premier et second ports de réception, respectivement ;
    - un premier bras de contact de pôle (10A) et un second bras de contact de pôle (10B) fixés audit corps principal (1A) et connectant ladite première borne de pôle (3) à un premier conducteur correspondant et ladite seconde borne de pôle (4) à un second conducteur de ligne, respectivement ; dans laquelle chaque bras de contact de pôle (10A, 10B) comprend :
    - un élément conducteur (11) ayant une première borne de bras de contact (111) et une seconde borne de bras de contact (112), ladite première borne de bras de contact étant couplée à une borne de pôle correspondante (3, 4), ladite seconde borne de bras de contact pouvant être couplée à un conducteur de ligne correspondant d'une ligne électrique ; caractérisée en ce que chaque bras de contact de pôle comprend en outre
    - un embout isolant (12) constitué d'un matériau isolant déformable élastiquement et entourant ledit élément conducteur (11) et comprenant un premier port de bras de contact (121) et une première partie d'embout (123) définissant ledit premier port de bras de contact, ladite première partie d'embout étant couplée à une partie de réception correspondante (53, 54) dudit boîtier isolant (5) et à une borne de pôle correspondante (3, 4) ;
    dans laquelle les parties de réception (53, 54) et les bornes de pôle (3, 4) dudit corps principal (1A) sont couplées selon une interaction mécanique aux parties d'embout (123) desdits bras de contact de pôle (10A, 10B), ce qui permet d'entraîner une déformation desdites parties d'embout (53, 54) et d'assurer un scellement diélectrique de j onctions mécaniques entre lesdits bras de contact de pôle (10A, 10B) et ledit boîtier isolant (5).
  2. Unité de pôle électrique selon la revendication 1, caractérisée en ce que ledit matériau déformable élastiquement est un matériau isolant élastomère.
  3. Unité de pôle électrique selon une ou plusieurs des revendications précédentes, caractérisée en ce que la première borne de bras de contact (111) de chaque bras de contact de pôle (10A, 10B) comprend des premières surfaces de couplage de bras de contact (111A) couplées à des surfaces de couplage de pôle correspondantes (3A, 4A) d'une borne de pôle correspondante (3, 4).
  4. Unité de pôle électrique selon une ou plusieurs des revendications précédentes, caractérisée en ce que la première partie d'embout (123) de chaque bras de contact de pôle (10A, 10B) comprend des deuxièmes surfaces de bras de contacts (123A) couplées à des surfaces de couplage de pôle correspondantes (53A, 54A) d'une partie de réception correspondante (53, 54).
  5. Unité de pôle électrique selon une ou plusieurs des revendications précédentes, caractérisée en ce que la première partie d'embout (123) de chaque bras de contact de pôle (10A, 10B) comprend des troisièmes surfaces de couplage (123B) couplées à des surfaces de couplage de pôle correspondantes (3B, 4B) d'une borne de pôle correspondante (3, 4).
  6. Unité de pôle électrique selon une ou plusieurs des revendications précédentes, caractérisée en ce que l'élément conducteur (11) et l'embout isolant (12) de chaque bras de contact de pôle (10A, 10B) sont moulés ensemble.
  7. Appareil de connexion (100) caractérisé en ce qu'il comprend une unité de pôle électrique (1) selon une ou plusieurs des revendications précédentes.
  8. Appareil de connexion selon la revendication 7, caractérisé en ce qu'il s'agit d'un appareil de connexion à moyenne tension.
EP20168230.9A 2020-04-06 2020-04-06 Bras de contact de pôle pour une unité de pôle électrique Active EP3893261B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20168230.9A EP3893261B1 (fr) 2020-04-06 2020-04-06 Bras de contact de pôle pour une unité de pôle électrique
CN202120142783.2U CN214626072U (zh) 2020-04-06 2021-01-19 电极单元的极接触臂、开关装置的电极单元及开关装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20168230.9A EP3893261B1 (fr) 2020-04-06 2020-04-06 Bras de contact de pôle pour une unité de pôle électrique

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EP3893261A1 EP3893261A1 (fr) 2021-10-13
EP3893261B1 true EP3893261B1 (fr) 2024-01-24

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DK2654133T3 (en) * 2010-12-14 2021-04-19 Ormazabal Y Cia S L U Connection device between high-voltage electrical apparatuses
CN104641439B (zh) * 2012-09-18 2016-07-06 三菱电机株式会社 树脂模塑衬套及开关装置
EP3093866B1 (fr) * 2015-05-13 2020-04-22 ABB Schweiz AG Unité de pôle électrique pour disjoncteurs à isolation gazeuse moyenne tension

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CN214626072U (zh) 2021-11-05

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