EP2927921B1 - Dispositif de contrôle du rebond du contact mobile dans un appareil de protection électrique moyenne tension, ainsi qu'un appareil de protection électrique comportant un tel dispositif - Google Patents

Dispositif de contrôle du rebond du contact mobile dans un appareil de protection électrique moyenne tension, ainsi qu'un appareil de protection électrique comportant un tel dispositif Download PDF

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Publication number
EP2927921B1
EP2927921B1 EP15157302.9A EP15157302A EP2927921B1 EP 2927921 B1 EP2927921 B1 EP 2927921B1 EP 15157302 A EP15157302 A EP 15157302A EP 2927921 B1 EP2927921 B1 EP 2927921B1
Authority
EP
European Patent Office
Prior art keywords
contact
bounce
abovementioned
spring
contacts
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.)
Active
Application number
EP15157302.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2927921A1 (fr
Inventor
Pierre Chavy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2927921A1 publication Critical patent/EP2927921A1/fr
Application granted granted Critical
Publication of EP2927921B1 publication Critical patent/EP2927921B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • 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
    • H01H33/02—Details
    • H01H33/025—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H01H2001/425—Knife-and-clip contacts with separate contact pressure spring confined between two contact knifes and urging the knifes onto a mating contact

Definitions

  • the present invention relates to an anti-rebound device for controlling the rebound of at least one moving contact in an electrical protection apparatus, said movable contact being able to be moved between a so-called closing position in which said moving contact is in contact.
  • electrical device with a fixed contact of the apparatus so as to allow the passage of current between these two contacts, and a second position in which these two contacts are separated, said device comprising damping means adapted to limit the rebound of the moving contact at the end of the closing operation of the movable contact, and an electrical protection device comprising such a device.
  • the movable contacts When closing the contacts in a medium voltage electrical protection device, the movable contacts, often in the form of a knife, engage the fixed contacts and at the end of the stroke, strike a stop surface. There is then a rebound phenomenon equivalent to the behavior of the hammer on the anvil.
  • shock absorber is degraded at extreme temperature of use of the devices (-40'C / + 70'C).
  • the elastomeric materials interact with the SF6 gas used in the cutoff enclosures and lose their properties.
  • the present invention solves these problems and proposes a device for controlling the rebound of at least one moving contact, in particular in a medium-voltage electrical protection device, making it possible to suppress the angular displacement of the moving contact during the rebound, in order to obtain a Rigorous and repetitive position of the contacts, whatever their environment and thus to ensure an optimal contact surface for the passage of the current.
  • the subject of the present invention is an anti-rebound device of the kind mentioned above, this device being characterized in that it comprises a spring mounted on one, said first, of the two contacts, and capable of cooperating with the other, said second, these two contacts, at the end of the closing maneuver, so as to ensure the damping of the displacement of the first contact and the indexing of the first contact with respect to the second contact.
  • the aforementioned spring is mounted retractable relative to this first contact, and cooperates with a hooking means carried by the second contact, the hooking means being adapted to perform the hooking of the two contacts in the closed position of the contacts while allowing the opening of the first contact.
  • this attachment means comprises a notch provided in the second contact.
  • this first contact is the aforementioned movable contact while this second contact is the aforementioned fixed contact.
  • the moving contact is of the rotary type.
  • the aforementioned movable contact comprises two knives mechanically connected to one another by an axis
  • the aforementioned spring comprises two windings connected by a so-called horizontal strand
  • said spring having two free ends respectively fixed to the two knives and the two windings being respectively mounted around two end portions of the aforementioned axis, said end portions of the axis being located outside the knives
  • the two knives each also comprising a groove extending substantially parallel to the longitudinal axis of the knives, and intended to slidably receive the aforementioned strand
  • said horizontal strand of the spring cooperating with the fixed contact during closure of the movable contact so that when the movable contact comes into contact with the contact fixed by its input radius, this causes the compression of the spring and thus the sliding of the strand to the grooves, after which the strand engages in the notch of the fixed contact performing damping and indexing above.
  • the aforementioned notch has an input radius and an output radius, and the compression ratio of the spring and the aforementioned input radius and output radius are chosen so as to obtain a hooking of the movable contact on the fixed contact in the direction closing the movable contact, while allowing its opening during a reverse command.
  • the aforementioned fixed contact is a so-called main contact intended for the transport of the nominal current or a ground contact belonging to an earthing switch.
  • the present invention further relates to a medium voltage electrical protection apparatus comprising an anti-rebound device having the above-mentioned characteristics taken alone or in combination.
  • each pair formed of a fixed contact and a movable contact belonging to the apparatus comprises an anti-rebound device comprising the aforementioned characteristics taken alone or in combination.
  • this device is a switch or a medium voltage disconnector.
  • a medium voltage switch I according to a particular preferred embodiment of the invention is partially illustrated on the figure 6 .
  • this switch I is in the closed position and comprises three movable contacts 1,2,3, having been brought into electrical contact with respectively three main fixed contacts 4,5,6, so as to close the electrical circuit in which this switch is placed I.
  • These mobile contacts 1,2,3 are more particularly illustrated on the figures 2,3 and 5 , on which we see that the fixed contacts 4,5,6 are each constituted by a simple knife, while the movable contacts are constituted by a double knife.
  • the two knives 1a, 1b of each movable contact are mechanically connected to each other at each end, by an axis 25 passing through the two end portions respectively of the two knives 1a, 1b.
  • a spacer 7 ensures the space between the two knives.
  • This axis 25 comprises a head supported at one of the two ends, visible on the figure 4 .
  • the opposite end comprises a spring 10 and a cup 11 providing a pressure necessary to the electrical contact, as shown in FIG. figure 3 .
  • These two knives 1a, 1b constituting each movable contact 1 comprise from their free ends, a groove 14,15 extending substantially parallel to the longitudinal direction of the knives, in an axial plane passing through the central axis of the axis above, this plane passing through the middle of the width of the knives.
  • These grooves 14,15 are intended to also receive a portion of the aforementioned indexing spring 13 called strand 19, as will be explained in the following.
  • This indexing spring 13 is constituted by a rigid wire 16 having two windings 17,18, these two windings 17,18 being connected to each other by one, said first, their ends, by a strand of wire 19, said horizontal, extending substantially perpendicular to the plane of the two windings 17,18, and having at their other end, said second, a portion 20,21 folded substantially at right angles.
  • the indexing spring 13 is mounted on the movable contact 1 in the following manner.
  • the horizontal strand 19 of the spring 13 is introduced into the grooves 14,15 of the two knives forming the movable contact. Then, the winding 17 comes to cover the shouldered head of the axis 25 at the end 8 and the winding 18 comes to cap the spring 10 and the cup 11 at the end 9.
  • the fixing of the spring 13 relative to the knives is performed by inserting the two free end portions 20,21 of the indexing spring 13 into two orifices respectively belonging to the two knives.
  • the spring 13 is mounted by capping the already pre-assembled elements. Its curved ends 20,21 hold it in place.
  • Mobile contacts 1,2,3 of the three phases of the switch are equipped with such an indexing spring 13.
  • Each fixed contact 4,5,6 has, as more particularly illustrated on the figure 5 , a single knife comprising at its free end, a solid portion 22 of substantially parallelepipedal shape having on its surface 23 intended to come into contact with the movable contact 1, a recess 24, or notch, extending in a direction substantially parallel to the longitudinal direction of the horizontal strand 19 of the spring 13 and the direction of alignment of the apparatus, and over a certain width of this fixed contact, this width being defined in the plane of the fixed knife 4,5,6 and perpendicular to the direction longitudinal of this fixed knife 4,5,6.
  • this solid part 22 of the fixed contact 4,5,6 are such that it can be slidably inserted between the two knives 1a, 1b of the movable contact 1,2,3 when brought into contact mobile contact on the fixed contact when closing these contacts.
  • the energy present during the rebound is channeled by the spring 13, which spring acts both as a damper of the movement of the movable contact and indexing of the movable contact relative to the fixed contact.
  • the movable knives deviate and come to cap the fixed contact against the action of the contact pressure spring.
  • the strand 19 of the spring comes into contact with the walls of the solid part 22 of the fixed contact 4 delimiting the notch 24 by the exit radius R2, and the spring 13 easily retracts because its compressive force is low (40N) compared to the torque delivered by the control device (95 Nm).
  • the invention is advantageously applicable to any type of medium voltage electrical protection device, such as a switch or a disconnector, having a rotating mobile contact, at the plugging of the electrical contacts.
  • a device for limiting the rebound of at least one moving contact in a medium-voltage electrical protection device has thus been achieved by means of the invention, said device being of simple design and making it possible to obtain a rigorous and repetitive position of the devices. regardless of their environment so as to ensure an optimal contact surface, this being achieved by the addition of an indexing spring mounted on one of the contacts and a notch provided in the other contact, a horizontal strand of the spring retracting on closing and becoming lodged in the notch, preventing rebound.
  • this system can also be used when closing a movable contact on the knife of a fixed earth contact belonging to an earthing switch, the knife having the same notch.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Contacts (AREA)
  • Breakers (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
EP15157302.9A 2014-03-31 2015-03-03 Dispositif de contrôle du rebond du contact mobile dans un appareil de protection électrique moyenne tension, ainsi qu'un appareil de protection électrique comportant un tel dispositif Active EP2927921B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1452810A FR3019386A1 (fr) 2014-03-31 2014-03-31 Dispositif de controle du rebond du contact mobile dans un appareil de protection electrique moyenne tension, ainsi qu'un appareil de protection electrique comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP2927921A1 EP2927921A1 (fr) 2015-10-07
EP2927921B1 true EP2927921B1 (fr) 2016-08-17

Family

ID=51610184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15157302.9A Active EP2927921B1 (fr) 2014-03-31 2015-03-03 Dispositif de contrôle du rebond du contact mobile dans un appareil de protection électrique moyenne tension, ainsi qu'un appareil de protection électrique comportant un tel dispositif

Country Status (4)

Country Link
EP (1) EP2927921B1 (es)
CN (1) CN104952640B (es)
ES (1) ES2602968T3 (es)
FR (1) FR3019386A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105895439A (zh) * 2016-04-25 2016-08-24 郑文秀 用于高压开关的隔离刀
FR3054367B1 (fr) * 2016-07-19 2021-12-10 Schneider Electric Ind Sas Dispositif d'amortissement du mouvement d'un arbre de commande dans un appareil de protection electrique et appareil de protection electrique comportant un tel dispositif
DE202019102309U1 (de) * 2019-04-24 2020-07-29 Conta-Clip Verbindungstechnik Gmbh Transformatorklemme

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1045510B (de) * 1955-01-05 1958-12-04 Voigt & Haeffner Ag Schalter mit zwei am festen Gegenkontakt beiderseits von aussen anliegenden Schaltschienen
US3137778A (en) * 1962-04-16 1964-06-16 Gen Electric Pivotally mounted disconnect switch contacts
FR2618591B3 (fr) * 1987-07-24 1990-03-02 Vidalenc Francois Dispositif de serrage pour contact electrique quadruple
US6313416B1 (en) * 1999-12-30 2001-11-06 Square D Company Current carrying switch structure
DE10047032C2 (de) * 2000-09-22 2003-12-04 Elpro Gmbh Berlin Industriehol Mittelspannungs-Trennermessen-Lasttrennschalter mit Vakuum-Schaltkammern
CN2859784Y (zh) * 2005-12-31 2007-01-17 朱连夫 刀形隔离器
CN202034286U (zh) * 2011-03-31 2011-11-09 厦门科力特电气有限公司 组合式带刀闸可转动绝缘主轴

Also Published As

Publication number Publication date
EP2927921A1 (fr) 2015-10-07
CN104952640B (zh) 2019-12-20
ES2602968T3 (es) 2017-02-23
CN104952640A (zh) 2015-09-30
FR3019386A1 (fr) 2015-10-02

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