EP2362406A1 - Sectionneur à semi-pantographe - Google Patents

Sectionneur à semi-pantographe Download PDF

Info

Publication number
EP2362406A1
EP2362406A1 EP10175102A EP10175102A EP2362406A1 EP 2362406 A1 EP2362406 A1 EP 2362406A1 EP 10175102 A EP10175102 A EP 10175102A EP 10175102 A EP10175102 A EP 10175102A EP 2362406 A1 EP2362406 A1 EP 2362406A1
Authority
EP
European Patent Office
Prior art keywords
arm
rod
shoe
base
semi
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.)
Withdrawn
Application number
EP10175102A
Other languages
German (de)
English (en)
Inventor
Francesco Rosin
Vincenzo Girlando
Eros Stella
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.)
Grid Solutions SpA
Original Assignee
Areva T&D Italy SpA
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 Areva T&D Italy SpA filed Critical Areva T&D Italy SpA
Publication of EP2362406A1 publication Critical patent/EP2362406A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
    • H01H31/36—Contact moved by pantograph
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

  • the present invention relates to a semi-pantograph disconnector.
  • pantograph or semi-pantograph disconnector are currently known.
  • the contact force is linked to the elasticity of the material and therefore to the rigidity of the tubes of the active part, and in order to have high contact forces it is necessary to have a high working torque.
  • a spring-operated device ensures a high contact force.
  • An additional spring allows to have low working torques because it balances the closing motion of the disconnector.
  • Disconnectors with an oscillating arm which have an arm which, on command, rotates during closure, straddling the dropper with a shoe so as to provide with it the desired electric contact, and then the shoe is closed to ensure the durable efficiency of this contact.
  • the shoe opens, leaving the dropper, and then the arm rotates and moves away from it.
  • disconnectors of this type have the drawback of having, when they are open, their shoe exposed to the effects of weather, so that it can become covered with ice, to the full detriment of an effective electrical contact during closure.
  • the aim of the present invention is to provide a semi-pantograph disconnector that meets this requirement, having a structure and an operation which are simpler than known currently known semi-pantograph disconnectors.
  • an object of the invention is to propose a disconnector that is reliable and has a durable precision of the grip of the dropper to close the electrical contact.
  • Another object of the invention is to provide a semi-pantograph disconnector that allows reliable grip of the dropper, allowing to adjust the grip force.
  • the reference numeral 10 generally designates a semi-pantograph disconnector, which comprises
  • the arm 13, by rotating by actuation of the motor kinematic system 12 about the rotation axis A, can pass reversibly from a disconnection configuration, in which the arm 13 is collapsed onto the base 11, to a contact configuration, in which the arm 13 is divaricated from the base 11 in electrical contact by means of the shoe 14 with a dropper 15.
  • a particularity of the disconnector 10 consists in that it comprises
  • the shoe 14 conveniently has a fixed jaw 19, which is jointly connected to the first end 13a of the arm 13, and a movable jaw 20, which is pivoted thereto and is connected to a first end 16a of the rod 16 in order to be rotated by it, so as to close and open the shoe 14.
  • the disconnector 10 comprises an element 21 for connecting the movable jaw 20 to the first end 16a of the rod 16, which substantially is elastically flexible.
  • the connecting element 21 comprises a spring 22, which is compressed between an abutment 23 of the rod 16 and a connector 24 to the movable jaw 20, in order to transmit between them a predefined force for closing the shoe 14.
  • the connector 24 is connected to the rod 16 so that it can slide axially with respect to it.
  • the connector 24 advantageously comprises a joint 25 which is pivoted to the movable jaw 20 in order to rotate it, and is connected by means of a threaded stem 26 to an abutment washer 27 for the spring 22.
  • abutment nuts 28 for the washer 27 are screwed onto the threaded stem 26 and are adapted to adjust the preloading of the spring 22 in order to define the grip force of the shoe 14 on the dropper 15.
  • the cam device 17 is preferably provided by a pin 29 which is jointly connected to the rod 16 and can slide along a guide 30 formed on the base 11.
  • the guide 30 conveniently forms for the pin 29 a trajectory B for spacing, for the opening of the shoe 14, and for subsequent radial approach with respect to the rotation axis A, the pin 29 following the trajectory B during such first and second rotations of the arm 13.
  • the semi-pantograph device 18 advantageously comprises
  • the rocker 31 is pivoted to the base 11 by means of a shaft 36, which is supported at its opposite ends by two plates of the base 11.
  • a stop element 37 is conveniently associated with the shaft 36 and is adapted to limit the sliding of the rod 16 along the arm 13 when it is collapsed onto the base 11.
  • the stop element 37 conveniently is inserted in a slot 38 of a base element 39 of the rod 16 and engages an end edge 40 thereof, thus preventing the movement of the rod 16 in the direction for opening the shoe 14.
  • the base element 39 conveniently has slotted eyes 41 which are longitudinal thereto and within which the shaft 42 for pivoting the arm 13 to the base 11 passes, such shaft being free to slide longitudinally therein during the relative sliding of the rod 16 with respect to the arm 13 for opening and closing the shoe 14.
  • the axis of the shaft 42 conveniently defines the rotation axis A.
  • the fixed jaw 19 comprises
  • the fixed jaw 19 can comprise fixed contacts 45, bolted to the arm 13, as shown by way of non-limiting example in Figures 2 and 5 .
  • the operation of the disconnector 10 according to the invention is as follows.
  • the disconnector has
  • the pivot 29 engages a first portion 30a of the guide 30, which is extended substantially in a direction which is aligned with the arm 13 when it is in the contact configuration.
  • the opening of the disconnector 10 is provided as follows.
  • the motor kinematic system acts on the rocker 31, pushing its first arm 32a in order to make it rotate about an auxiliary rotation axis C, which is parallel to the rotation axis A and is formed by the axis of the shaft 36, counterclockwise with reference to Figures 2 and 3 .
  • the second arm 32b pulls the rod 16 so as to slide in the arm 13 toward the second end 13b, by means of the linkage 33 that acts on the slider 34.
  • the pin 29 descends, disengaging the first portion 30a of the guide 30, moving away from the rotation axis A.
  • the abutment 23 jointly connected to the first end 16a of the rod 16 moves away from the joint 25, partially relaxing the spring 22, thus reducing the tightness of the shoe 14 on the dropper 15.
  • the threaded stem 25 has, at one end 25a, inserted in the first end 16a, a shoulder 25b for engaging a complementary shoulder 16b of the first end 16a.
  • a return spring is provided between the shaft 42 and the slider 34, to draw it back toward the second end 13b of the arm 13, in order to facilitate the opening of the shoe 14.
  • the movable jaw 20 is conveniently divaricated from the fixed jaw 19 enough to avoid interfering with the dropper 15 during the subsequent rotation of the arm 13 that collapses onto the base 11.
  • torsion springs 47 which connects the base 11 and the arm 13 so as to contrast its collapse onto such base and in order to facilitate vice versa its divarication.
  • the shoe 14 is at least partially closed, so as to be protected against atmospheric agents and in particular against the formation of ice.
  • closure of the disconnector 10 occurs as follows.
  • the motor kinematic system draws the first arm 32a so as to turn the rocker 31 about the auxiliary axis C clockwise with reference to Figures 2 and 3 .
  • the rocker 31 transmits its rotation to the arm 13, which is divaricated from the base 11 to the contact configuration, in which the shoe 14 has the fixed jaw 19 in abutment against the dropper 15.
  • the movable jaw 20, during this rotation of the arm 13, is divaricated from the fixed jaw 19 by the action of the rod 16, which is entrained by the pin 29, which slides along the guide 30 so as to move away from the rotation axis A, thus drawing the rod 16 toward the second end 13b of the arm 13.
  • the arm 13 is composed of four parallel plates 48, within which the rod 16 is accommodated longitudinally.
  • such arm can be provided by means of just two plates, or with more than four plates, or such arm can be tubular or can have an open profile, such as a C-shaped profile.
  • the invention achieves the intended aim and objects, providing a semi-pantograph disconnector that has a simpler structure and operation than currently known semi-pantograph disconnectors despite being at least as reliable and durable.
  • a disconnector according to the invention allows to adjust the grip force of the shoe on the dropper, to the full advantage of its adaptability to the most disparate contingent requirements.
  • the materials used may be any according to requirements and to the state of the art.

Landscapes

  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Transmission Devices (AREA)
EP10175102A 2010-02-23 2010-09-02 Sectionneur à semi-pantographe Withdrawn EP2362406A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD2010A000050A IT1398343B1 (it) 2010-02-23 2010-02-23 Sezionatore a semi-pantografo.

Publications (1)

Publication Number Publication Date
EP2362406A1 true EP2362406A1 (fr) 2011-08-31

Family

ID=42827316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10175102A Withdrawn EP2362406A1 (fr) 2010-02-23 2010-09-02 Sectionneur à semi-pantographe

Country Status (5)

Country Link
EP (1) EP2362406A1 (fr)
CN (1) CN102163508A (fr)
BR (1) BR112012021274B8 (fr)
IT (1) IT1398343B1 (fr)
WO (1) WO2011104207A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1204754A (fr) * 1958-07-22 1960-01-28 Merlin Gerin Dispositif de support pour sectionneurs
US5186315A (en) * 1990-07-19 1993-02-16 Merlin Gerin High voltage disconnecting switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1204754A (fr) * 1958-07-22 1960-01-28 Merlin Gerin Dispositif de support pour sectionneurs
US5186315A (en) * 1990-07-19 1993-02-16 Merlin Gerin High voltage disconnecting switch

Also Published As

Publication number Publication date
IT1398343B1 (it) 2013-02-22
ITPD20100050A1 (it) 2011-08-24
BR112012021274B8 (pt) 2020-10-20
WO2011104207A1 (fr) 2011-09-01
CN102163508A (zh) 2011-08-24
BR112012021274A2 (pt) 2016-10-25
BR112012021274B1 (pt) 2020-09-29

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