EP3046129B1 - Lastschaltsystem mit parallelem Strompfad - Google Patents

Lastschaltsystem mit parallelem Strompfad Download PDF

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Publication number
EP3046129B1
EP3046129B1 EP15305036.4A EP15305036A EP3046129B1 EP 3046129 B1 EP3046129 B1 EP 3046129B1 EP 15305036 A EP15305036 A EP 15305036A EP 3046129 B1 EP3046129 B1 EP 3046129B1
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EP
European Patent Office
Prior art keywords
moving contact
contact
pallet
vacuum interrupter
region
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EP15305036.4A
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English (en)
French (fr)
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EP3046129A1 (de
Inventor
Ashish Agrawal
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Priority to EP15305036.4A priority Critical patent/EP3046129B1/de
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    • 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
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
    • 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
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle

Definitions

  • the present invention relates to a shunt breaking device designed to break an electrical circuit in a medium voltage switch disconnector, incorporating such a device.
  • the features of the preamble of the independent claim are known from EP 0 693 763 A1 .
  • Related technology is known from DE 10 2010 045233 A1 .
  • an electrical switch disconnector is designed to provide a making or breaking of specified currents.
  • it mainly comprises a sealed enclosure filled with a high dielectric strength gas, in which a pair of main contacts are arranged, one stationary contact and the other movable, connected to an operating drive.
  • a pair of arcing contact are sometimes electrically connected in parallel to the main contacts, such as to open the arcing contacts after the main contacts during breaking, and to close the arcing contacts before the main contacts during making.
  • EP2182536 describes an application for a switch disconnector with rotary motion of the contacts.
  • the linkage operating the vacuum interrupter ( Figure 1 ) has a sliding joint 10 between the lever 7 and the moving contact 5 of the vacuum interrupter.
  • the end positions and movement (velocity) of moving contact of vacuum interrupter depends on the length of ratios of lever 7 i.e. distance between the pivot 11 and its free end 9 to the distance between the pivot 11 to the sliding joint 10.
  • EP2479769 discloses an application for a switch disconnector having moving contacts with rotary and sliding or linear motion.
  • the lever 18, interacting with the main moving contact is pivoted at two positions 11 and 21.
  • This lever articulates/rotates about different pivots during opening and closing of the switch disconnector.
  • the lever 18 rotates about pivot 21.
  • This lever has an oblong slot which allows it to rotate about pivot 11 during closing of switch disconnector.
  • the linkage operating the vacuum interrupter has a lever 18 which is pivoted about the pin 21.
  • This lever is connected to the moving contact of vacuum interrupter by a hinge 11.
  • the end positions and movement (velocity) of moving contact of vacuum interrupter depends upon the length ratios of the lever 18 i.e. distance between the pivot 11 and its free end to the distance between pivot 11 to the pivot pin 21.
  • Prior art DE10047032 relates to an application for a switch disconnector having moving contacts with rotary motion ( figure 5 ).
  • Secondary circuit vacuum interrupter and linkage mechanism
  • Cam 12 operates a pin 11 which is rigidly connected to the moving contact of the vacuum interrupter.
  • the secondary circuit along with the vacuum interrupter is mounted on the moving contact which increases the mass of the moving contact and shall demand more energy to move the contacts of switch disconnector.
  • the present invention provides for a Shunt Breaking System for a medium voltage switching apparatus, as defined in the independent claim, such that the system is designed to generate a parallel or secondary circuit within the said apparatus where the linkage mechanism included in the said system allows the vacuum interrupter to be placed at any desirable position based on the available space within the said switching device.
  • the present invention is intended to function as a parallel or secondary circuit for an existing switch disconnector. Considering the size of existing enclosures, vacuum interrupter has to be positioned in location such that the new linkage mechanism is rendered suitable to transfer the motion to the vacuum interrupter in less space or rather available space.
  • a shunt breaking system of the present invention comprising a primary circuit consisting of stationary contact (1) and moving contact (18); a secondary circuit consisting of a vacuum interrupter (5) electrically connected to the stationary contact (1) on terminal (12) with a suitable connection means (4) such as a screw and a linkage mechanism comprising multiple linkage means supported on a linkage support (6) having top linkage means (8) connected to pulling pin (7) at its first end and bottom linkage means (10) at its second end by means of sliding pins (9) slidable into slits provided in the linkage support (6).
  • the second end of bottom linkage means (10) is connected by stationary pin (11) fixedly placed in recess provided in fixed support (19).
  • a collar (3) configured of passing through a bore in the linkage support (6), is connected to bottom linkage means (10) with stationary pin (11) at collar first end and the moving contact end (13) of vacuum interrupter (5) at collar second end.
  • the fixed support (19) comprising an inverse 'F' slot guiding a guiding pin (17), pulling pin (7) and pallet base (14) in it, is enabled to support linkage mechanism and insulate live parts from nearest earth/tank and other phase conductors.
  • the fixed support (19) comprising the pallet base (14) with pallet contact (15) rigidly fixed thereto.
  • the fixed support (19) comprises of regions A, B and C which together comprise a guiding slot.
  • the moving contact end (13) is electrically connected to pallet contact (15) by means of a flexible wire (20), said pallet contact interacting with a protrusion (22) protruding out of an arm of the moving contact.
  • An insulating cover (2) is sleeved over the vacuum interrupter (5) to provide necessary insulation during TRV.
  • the pallet contact (15) is rigidly fixed to the pallet base (14).
  • the guiding pin (17) configured to pass through the pulling lever (16) is connected to pallet base (14) at both ends.
  • the shunt breaking system of the present invention is of medium voltage type suitable for placement in a medium voltage switching apparatus such as a switch disconnector.
  • the operating drive is a linear operating drive whereas in another embodiment, the operating mechanism is a rotary operating mechanism.
  • the system of the present invention is designed to generate a parallel or secondary circuit in the said switch apparatus.
  • the operating drive of the present invention is designed to actuate the moving contact (18) takes four positions of opening position, disconnecting position, separating position and closing position. Before the four positions are achieved, the system of the present invention remains in an initial position.
  • Figure 10 and 12 shows the initial position of the system in which the current flows from the stationary contact (1) to the moving contact (18) through the primary circuit.
  • the secondary circuit is inactive and vacuum interrupter (5) is in close position.
  • the figure shows regions D i.e. profiled region on pallet contact (15); region E i.e. profiled region on moving contact (18) and region F i.e. profiled region of pulling lever (16).
  • the opening position is a position for connection between the protrusion (22) and the pallet contact (15) when the moving contact (18) is electrically connected to the pallet contact (15) to establish a secondary circuit (1-12-13-20-15-18) besides a primary circuit (1-18).
  • the moving contact travels vertically upwards enabling region E to interact with region D.
  • the guiding pin (17) being connected to pallet base interacts with region F of the pulling lever (16) transferring no movement to the vacuum interrupter (5) resulting in the vacuum interrupter being in closed position.
  • disconnecting position is a position in which the moving contact (18) leaves the stationary contact (1) causing the primary circuit (1-18) to become inactive and current to flow only through the secondary circuit.
  • the guiding pin (17) travels in region F of the pulling lever (16) and region A of the fixed support (19) transferring no movement to the vacuum interrupter resulting in the vacuum interrupter (5) being in closed position.
  • the guiding pin (17) on achieving a sufficient dielectric distance attaches to the pulling lever (16); the pulling pin (7) constrained with pulling lever (16) pulls the linkage support (6) for attaching to collar (3) thereto.
  • the ratio of length of top linkage means (8) and the bottom linkage means (10) is modified based on desired rating, stroke or velocity required for opening the moving contact (18). In the present embodiment, the length of top linkage means (8) and bottom linkage means (10) is equal making the ratio of velocity of pulling pin (7) to linkage support (6) to 2:1.
  • the linkage support (6) engages the collar (3) and vacuum interrupter moving contacts, the vacuum interrupter contact will open with half velocity in comparison to moving contact (18). The length of the linkage means to open the vacuum interrupter contacts depends on the desired velocity.
  • the separating position is a position in which the guiding pin (17) and pallet pivot (21) interact with region B of the fixed support (19) while reducing speed of vacuum interrupter (5) to a desired level.
  • the engagement between pallet contact (15) and moving contact (18) configured to keep vacuum interrupter (5) open preventing re-striking or re-igniting an arc between pallet contact (15) and moving contact (18) on separation from each other.
  • the closing position is a position in which release of the moving contact (18) from the pallet contact (15) renders the primary circuit and secondary circuit inactive.
  • the linkage mechanism collapses by its weight and by the contacts closing force of vacuum interrupter (5).
  • the pallet pivot (21) and guiding pin (17) retract to their initial position passing through regions B and A closing the vacuum interrupter (5).
  • the moving contact (18) moves down in the linear axis from its open position, the protrusion (22) interacting with the pallet base (14), said pallet base (14) pivoting about guiding pin (17) around pallet pivot (21) in region C allowing the moving contact (18) to move down.
  • the moving contact (18) electrically engages with stationary contact (1) closing primary circuit, said moving contact (18) completing its stroke resulting in pallet base (14) returning to its initial position.
  • the closing position is the intermediate position before initial position is achieved.
  • the input motion can be transferred to vacuum interrupter to allow it to act as secondary circuit even in linear motion switch disconnectors while satisfying the breaking needs for a given switch disconnector.
  • change in stroke of the vacuum interrupter is possible by changing the slot width in pulling lever as well as by changing the slot profile in Fixed Support.
  • change in contact velocity of vacuum interrupter is possible by changing the length of scissor linkages.
  • the opening of vacuum interrupter is in the same direction as the motion of moving contact which nullifies the possibility of damaging/twisting of VI moving stem.
  • the switch disconnector in RM6 Ring Main Unit has a linear contact movement and the new design for the secondary or parallel circuit is suitable considering its enclosure size.
  • Other breaker and switch disconnectors like Flusarc also have the potential to implement the above design.
  • the linkage mechanism can also be made suitable for a switch disconnector with rotary contacts.
  • additional dampers could be provided to let the protrusion (22) and pallet contact be connected.
  • a torsion spring could be provided to have a push back force.
  • the present invention may be added as a subassembly to the existing switch disconnector.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (13)

  1. Nebenschluss-Unterbrechersystem, umfassend:
    einen Primärkreis, der aus einem stationären Kontakt (1) und einem beweglichen Kontakt (18) besteht, wobei der stationäre Kontakt (1) mit einer ankommenden Sammelschiene verbunden ist und der bewegliche Kontakt (18) mit einer abgehenden Sammelschiene verbunden ist;
    einen Sekundärkreis, der aus einem Vakuumunterbrecher (5) besteht, der elektrisch mit dem stationären Kontakt (1) an einem Anschluss (12) mit geeigneten Verbindungsmitteln (4) verbunden ist;
    einen Gestängemechanismus, der mehrere Gestängemittel umfasst, die auf einem Gestängeträger (6) abgestützt sind und obere Gestängemittel (8), die an ihrem ersten Ende mit einem Zugstift (7) verbunden sind, und untere Gestängemittel (10) aufweisen, die mit Hilfe von Gleitstiften (9), die in Schlitze gleiten können, die in dem Gestängeträger (6) vorgesehen sind, an ihrem zweiten Ende verbunden sind, wobei das zweite Ende der unteren Gestängemittel (10) durch einen stationären Stift (11) verbunden ist, der fest in einer Aussparung angeordnet ist, die in einem festen Träger (19) vorgesehen ist,
    dadurch gekennzeichnet, dass
    ein Stellring (3), der konfiguriert ist, um durch eine Bohrung in dem Gestängeträger (6) hindurch zu gehen, mit dem unteren Gestängemittel (10) durch den stationären Stift (11) an einem ersten Ende des Stellrings und einem beweglichen Kontaktende (13) des Vakuumunterbrechers (5) an einem zweiten Ende des Stellrings verbunden ist,
    das bewegliche Kontaktende (13) mit einem Palettenkontakt (15) über einen flexiblen Draht (20) elektrisch verbunden ist, wobei der Palettenkontakt (15) mit einem Vorsprung (22) zusammenwirkt, der aus einem Arm des beweglichen Kontakts (18) herausragt und einen ersten Profilbereich (D) zum Zusammenwirken mit einem zweiten Profilbereich (E) des beweglichen Kontakts (18) umfasst.
  2. Nebenschluss-Unterbrechersystem nach Anspruch 1, wobei der feste Träger (19), der einen inversen "F"-Schlitz umfasst, der einen Führungsstift (17), einen Zugstift (7) und eine Palettenbasis (14) darin führt, in der Lage ist, den Gestängemechanismus zu stützen und spannungsführende Teile gegen eine nächstgelegene Erdung/einen Behälter und andere Phasenleiter zu isolieren.
  3. Nebenschluss-Unterbrechersystem nach einem der vorhergehenden Ansprüche, wobei der feste Träger (19) die Palettenbasis (14) mit dem daran starr befestigten Palettenkontakt (15) umfasst, wobei der feste Träger (19) einen ersten Bereich (A), einen zweiten Bereich (B) und einen dritten Bereich (C) aufweist, die in dem inversen "F"-Schlitz des festen Trägers (19) enthalten sind.
  4. Nebenschluss-Unterbrechersystem nach einem der vorhergehenden Ansprüche, wobei der Führungsstift (17), der konfiguriert ist, um durch einen Zughebel (16) hindurch zu gehen, an beiden Enden mit der Palettenbasis (14) verbunden ist, wobei der Zughebel (16) einen dritten Profilbereich (F) zum Zusammenwirken mit dem Führungsstift (17) umfasst.
  5. Nebenschluss-Unterbrechersystem nach einem der vorhergehenden Ansprüche, wobei der Gestängemechanismus, der zum Betätigen des beweglichen Kontakts (18) ausgelegt ist, vier Positionen einnimmt, nämlich eine Öffnungsposition, eine Unterbrechungsposition, eine Trennposition und eine Schließposition, wobei der bewegliche Kontakt (18) eine Ausgangsposition einnimmt, die den vier Positionen vorausgeht.
  6. Nebenschluss-Unterbrechersystem nach Anspruch 5, wobei in der Ausgangsposition der Primärkreis geschlossen bleibt, der Sekundärkreis inaktiv bleibt und der Vakuumunterbrecher (5) in einem geschlossenen Zustand ist.
  7. Nebenschluss-Unterbrechersystem nach Anspruch 5, wobei die Öffnungsposition eine Position zur Verbindung zwischen dem Vorsprung (22) und dem Palettenkontakt (15) ist, wenn der bewegliche Kontakt (18) elektrisch mit dem Palettenkontakt (15) verbunden ist, um den Sekundärkreis neben dem Primärkreis aufzubauen, der bewegliche Kontakt (18) vertikal nach oben wandert, so dass der zweite Profilbereich (E) mit dem ersten Profilbereich (D) zusammenwirken kann und der Führungsstift (17), der mit der Palettenbasis (14) verbunden ist, mit dem dritten Profilbereich (F) des Zughebels (16) zusammenwirkt und keine Bewegung auf den Vakuumunterbrecher (5) überträgt, was dazu führt, dass sich der Vakuumunterbrecher (5) in der Schließposition befindet.
  8. Nebenschluss-Unterbrechersystem nach Anspruch 5, wobei die Unterbrechungsposition eine Position ist, in der der bewegliche Kontakt (18) den stationären Kontakt (1) verlässt, wodurch der Primärkreis inaktiv wird und Strom nur durch den Sekundärkreis fließt, der Führungsstift (17) in dem dritten Profilbereich (F) des Zughebels (16) wandert und der erste Bereich (A) des inversen "F"-Schlitzes des festen Trägers (19) keine Bewegung an den Vakuumunterbrecher (5) überträgt, was dazu führt, dass sich der Vakuumunterbrecher (5) in der Schließposition befindet, wobei der Führungsstift (17), um einen ausreichenden dielektrischen Abstand zu erreichen, sich an den Zughebel (16) anheftet und der mit dem Zughebel (16) eingespannte Zugstift (7) den Gestängeträger (6) zur Befestigung an dem Stellring (3) dorthin zieht.
  9. Nebenschluss-Unterbrechersystem nach Anspruch 8, wobei der Führungsstift (17) und ein Palettenzapfen (21), die sich gleichzeitig im ersten Bereich (A) des inversen "F"-Schlitzes des festen Trägers (19) zusammen mit der Palettenbasis (14) bewegen, den Vakuumunterbrecher (5) betätigen, was zu einer Stromunterbrechung im Sekundärkreis führt, und der Gestängeträger (6) mit dem Stellring (3) und dem beweglichen Kontakt (18) in Eingriff tritt, wobei sich der Kontakt mit halber Geschwindigkeit im Vergleich zum beweglichen Kontakt (18) öffnet.
  10. Nebenschluss-Unterbrechersystem nach Anspruch 9, wobei das Längenverhältnis zwischen den oberen Gestängemitteln (8) und den unteren Gestängemitteln (10) basierend auf einer gewünschten Klassifizierung, einem gewünschten Hub oder einer zum Öffnen des beweglichen Kontakts (18) gewünschten Geschwindigkeit geändert wird.
  11. Nebenschluss-Unterbrechersystem nach Anspruch 5, wobei die Trennposition eine Position ist, in der der Führungsstift (17) und der Palettenzapfen (21) mit dem zweiten Bereich (B) des inversen "F"-Schlitzes des festen Trägers (19) zusammenwirken, während eine Geschwindigkeit des Vakuumunterbrechers (5) auf ein gewünschtes Niveau reduziert wird, wobei der Eingriff zwischen dem Palettenkontakt (15) und dem beweglichen Kontakt (18) konfiguriert ist, um den Vakuumunterbrecher (5) offen zu halten, um ein erneutes Einschalten oder erneutes Zünden eines Lichtbogens zwischen dem Palettenkontakt (15) und dem beweglichen Kontakt (18) bei Trennung voneinander zu verhindern.
  12. Nebenschluss-Unterbrechersystem nach Anspruch 5, wobei die Schließposition, die eine Zwischenposition ist, bevor die Ausgangsposition erreicht wird, eine Position ist, in der das Lösen des beweglichen Kontakts (18) vom Palettenkontakt (15) den Primärkreis und den Sekundärkreis inaktiv macht, wobei der Gestängemechanismus durch sein Gewicht und durch die Schließkraft der Kontakte des Vakuumunterbrechers (5) zusammenbricht; der Palettenzapfen (21) und der Führungsstift (17) sich in ihre Ausgangsposition zurückziehen, wobei sie durch den zweiten Bereich (B) und den ersten Bereich (A) des inversen "F"-Schlitzes des festen Trägers (19) hindurchgehen, wodurch der Vakuumunterbrecher (5) geschlossen wird.
  13. Nebenschluss-Unterbrechersystem nach Anspruch 12, wobei sich der bewegliche Kontakt (18) aus seiner geöffneten Position in der Linearachse nach unten bewegt, wobei der Vorsprung (22) mit der Palettenbasis (14) zusammenwirkt, wobei die Palettenbasis (14) an dem Führungsstift (17) um den Palettenzapfen (21) im dritten Bereich (C) des inversen "F"-Schlitzes des festen Trägers (19) schwenkt, so dass sich der bewegliche Kontakt (18) nach unten bewegen kann; wobei der bewegliche Kontakt (18) elektrisch mit dem stationären Kontakt (1) in Eingriff tritt und den Primärkreis schließt, wobei der bewegliche Kontakt (18) seinen Hub beendet, was dazu führt, dass die Palettenbasis (14) in ihre ursprüngliche Position zurückkehrt.
EP15305036.4A 2015-01-15 2015-01-15 Lastschaltsystem mit parallelem Strompfad Active EP3046129B1 (de)

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EP3046129B1 true EP3046129B1 (de) 2019-09-11

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3121267A1 (fr) 2021-03-24 2022-09-30 Schneider Electric Industries Sas Système de coupure d’un appareil électrique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722912B1 (fr) * 1994-07-20 1996-09-13 Schneider Electric Sa Interrupteurs electriques moyenne tension
DE10047032C2 (de) 2000-09-22 2003-12-04 Elpro Gmbh Berlin Industriehol Mittelspannungs-Trennermessen-Lasttrennschalter mit Vakuum-Schaltkammern
FR2937786B1 (fr) 2008-10-29 2010-12-24 Areva T & D Sa Interrupteur de courant sur une ligne electrique comprenant une ampoule a vide
DE102010045233B4 (de) * 2010-09-10 2012-05-24 Siemens Aktiengesellschaft Lasttrennschalter
FR2970809B1 (fr) 2011-01-25 2013-02-22 Schneider Electric Ind Sas Dispositif de coupure moyenne tension comprenant une ampoule a vide

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