WO2005076304A1 - Disjoncteur a charge - Google Patents

Disjoncteur a charge Download PDF

Info

Publication number
WO2005076304A1
WO2005076304A1 PCT/DE2005/000151 DE2005000151W WO2005076304A1 WO 2005076304 A1 WO2005076304 A1 WO 2005076304A1 DE 2005000151 W DE2005000151 W DE 2005000151W WO 2005076304 A1 WO2005076304 A1 WO 2005076304A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
main
contact piece
switch
contact arrangement
Prior art date
Application number
PCT/DE2005/000151
Other languages
German (de)
English (en)
Inventor
Christoph RÖHLING
Jörg Teichmann
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2005076304A1 publication Critical patent/WO2005076304A1/fr

Links

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
    • H01H33/02—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
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm
    • 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
    • H01H31/003—Earthing 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
    • H01H33/60—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

Definitions

  • the invention relates to a switch disconnector for interrupting an alternating current with a main contact arrangement which has a movable main moving contact piece, and with a shunt branch electrically connected in parallel with the main contact arrangement, in which a quenching contact arrangement for extinguishing an arc and an isolating contact arrangement consisting of isolating contact pieces for providing a dielectric strength in series with one another are switched, wherein a current flow through the shunt branch is made possible after opening the main contact arrangement.
  • Such a load break switch is already known for example from DE 195 40 552 AI.
  • the switch disconnector disclosed there is provided for interrupting an alternating current and has a main contact arrangement consisting of a pivotable switching knife, which is connected in parallel to an auxiliary current branch in which an erase contact arrangement and an isolating contact arrangement are arranged in series with one another.
  • the isolating contact arrangement lags behind the main contact arrangement, so that after the main contact arrangement has been opened, current can initially flow through the auxiliary current branch.
  • the extinguishing contact arrangement is opened, which is arranged there in an extinguishing chamber filled with sulfur hexafluoride gas.
  • DE 38 32 493 A1 discloses an erase contact arrangement arranged in a vacuum chamber, which is connected in parallel to a main contact arrangement.
  • the main contact arrangement and the erase contact arrangement form a parallel circuit which is arranged in series with an isolating contact arrangement.
  • the load switch disclosed in DE 199 18 070 Cl develops a switch disconnector described in WO 98/09310 so that the switch disconnector is also switched on again via the extinguishing contact arrangement.
  • the quenching contact arrangement is arranged in series with a disconnecting contact arrangement in a shunt branch with which a main contact arrangement can be bridged.
  • the object of the invention is to provide a switch disconnector of the type mentioned at the outset, which is simplified in terms of its construction and is inexpensive.
  • the invention solves this problem in that the main moving contact piece is simultaneously one of the isolating contact pieces of the isolating contact arrangement.
  • a common movable contact piece is provided both for the main contact arrangement and for the isolating contact arrangement.
  • the main moving contact is in an operating position of the switch disconnector, in which a current flow through the main contact arrangement is made possible, in contact with a main fixed contact piece of the main contact arrangement. In the operating position, the main moving contact piece can also contact one of the isolating contact pieces of the isolating contact pieces.
  • the main moving contact piece only contacts the main fixed contact piece in the operating position, but before the main contact pieces of the main contact arrangement are disconnected, the main moving contact piece comes into contact with the disconnecting contact piece of the separating contact arrangement assigned to it, so that a shunt of the main contact arrangement and thus the pulling out of a switch-off arc between the contact pieces of the main contact arrangement is avoided.
  • Such an arc could damage the surface material of the main contact arrangement due to the high level of heat and reduce the durability of the circuit breaker.
  • the current therefore flows according to the invention via the shunt branch and thus via the quenching contact arrangement and via the isolating contact arrangement connected in series in this regard, until the contact pieces of the quenching contact arrangement finally open and the arc is drawn between the contact pieces of the quenching contact arrangement. If the alternating current to be interrupted passes zero, the arc is extinguished in a known manner. By opening the isolating contact arrangement without current, a sufficiently large isolating distance is finally provided to maintain the required dielectric strength.
  • the switch disconnector according to the invention is provided for interrupting a nominal current and is set up for operation with large quantities. In comparison to so-called circuit breakers, which are able to interrupt significantly higher short-circuit currents, the switch disconnector is therefore inexpensive.
  • the maximum current that the switch disconnector according to the invention can still interrupt is, for example, 2 kA.
  • the quenching contact arrangement is advantageously arranged in a vacuum chamber.
  • this is an inexpensive vacuum tube which is provided, for example, neither with contact pressure springs nor with other additional components which drive up the production costs of the vacuum tube. According to this further development, it is possible, for example, that the extinguishing contact pieces only result from the pressure difference
  • the isolating contact arrangement advantageously has a pivotably mounted swivel bracket as isolating contact piece, which can be pivoted by the main moving contact piece before the isolating contact arrangement is opened.
  • a separating contact piece is realized as a swivel bracket, which is provided at its free end for contacting the main moving contact piece and, for example, on a nem fixed support frame of the switch disconnector is hinged. The articulation enables the swivel bracket to be pivoted through the main moving contact piece, which thereby contacts the swivel bracket and, in other words, takes it along a certain path length of a common swivel path.
  • the separation or switching path of the main moving contact piece differs from that of the swivel bracket, so that there is finally a lifting of the main moving contact piece from the swivel bracket.
  • the movement paths of the swivel bracket and the main moving contact piece are adjusted to one another in such a way that the disconnection of the disconnection contact arrangement takes place without current, that is to say after the disconnection of the extinguishing contact arrangement.
  • the swivel bracket has at its end facing the main movement contact piece a snap mechanism which allows the swivel bracket to be carried along by the main movement contact piece in a switch-off direction, but when the main movement contact piece moves in a switch-on direction opposite to the switch-off direction, the main movement contact piece is guided past allows the swivel bracket.
  • the snap mechanism ensures that the main moving contact piece takes the swivel bracket along until the main moving contact piece and the swivel bracket are separated from one another due to different switching paths.
  • the snap mechanism has a plastic one Holding section and a metal snap bracket pivotally mounted on the holding section, wherein the snap bracket has an end-side driving lug, which is in contact with the main contact element in a contact position of the isolating contact arrangement, and a stop end opposite the driving lug, which in the contact position of the isolating contact arrangement bears against the swivel bracket and prevents swiveling of the swivel bracket in the direction of switching off the main moving contact piece.
  • the main moving contact piece is designed as a rotatable switching knife.
  • the rotatable switching knife can be driven, for example, by means of a drive shaft.
  • the main moving contact piece is implemented as a switching rod which carries out a lifting movement.
  • the swivel bracket is connected to the extinguishing contact arrangement in order to initiate a switching movement. Due to the mechanical connection of the swivel bracket to the extinguishing contact arrangement, complex electronic synchronization between the isolating contact arrangement and the extinguishing contact arrangement is avoided.
  • a movable extinguishing movement contact piece of the extinguishing contact arrangement is rigidly connected to a driver pin which is arranged in an elongated hole of the swivel bracket.
  • the synchronization of the opening is determined in this embodiment by the length of the elongated hole. So the pivoting of the swivel bracket has no effect on the extinguishing contact arrangement until the driver pin strikes one end of the elongated hole. Then by taking the Swivel bracket initiated by the main contact arrangement, a switching movement in the erase contact arrangement with which the contact pieces of the erase contact arrangement are separated from one another. Only after the arc is extinguished is there a separation of the contact pieces of the isolating contact arrangement, which are thus separated from one another without current.
  • a torsion spring is advantageously provided for holding the swivel bracket on the main fixed contact piece. According to this advantageous further development, after the disconnecting contact arrangement has been disconnected, the swivel bracket moves in a direction opposite to the switch-off direction. For example, after it is switched off, it bears against the stationary main fixed contact piece of the main contact arrangement.
  • a compression spring is provided for pressing an extinguishing movement contact piece of the extinguishing contact arrangement against a fixed extinguishing contact piece in this regard.
  • the additional compression spring makes it even more difficult for the contacts of the extinguishing contact arrangement to be lifted off by electrodynamic forces.
  • FIG. 1 shows an exemplary embodiment of the disconnector according to the invention in a side view
  • Figure 2 is an enlarged view of a vacuum tube of an erase contact arrangement and Figure 3 shows an embodiment of a snap mechanism of the isolating contact arrangement.
  • FIG. 1 shows an embodiment of the switch disconnector 1 according to the invention in a schematic side view.
  • the switch disconnector 1 shown there has a main contact arrangement 4 consisting of a main moving contact piece 2 and a stationary main fixed contact piece 3, an isolating contact arrangement 6 consisting of a swivel bracket 5 and the main moving contact piece 2, and an extinguishing contact arrangement 8 arranged in a vacuum tube 7, which is not shown in the figures , Furthermore, an earth contact 9 is provided, which comes into contact with the main moving contact piece 2 in an off position.
  • the disconnector 1 is held in a support frame 10, which is only indicated schematically and which can also serve as a stop limiting the switching movement, for example for the swivel bracket 5.
  • the main fixed contact piece 3 of the main contact arrangement 4 is fixedly connected to the housing 10 and serves to hold the vacuum tube 7, which is firmly connected to the main moving contact piece 3 via screwing means 11.
  • an erasable fixed contact piece (not recognizable in FIG. 1) extends into the vacuum tube 7, which is located on the end face of an erase moving contact piece, which in turn is electrically connected to the pivot bracket 5.
  • the quenching motion contact piece arranged within the vacuum tube 7 is guided in the vacuum tube 7 in a longitudinally movable manner and is sealed off from the outside by means of a metal bellows 12.
  • the quenching movement contact piece is rigidly connected to a non-conductive switching rod 13, which is in the switching direction of the Extinguishing movement contact piece extends and is provided in the transverse direction with a driver pin 13a, which is arranged in an elongated hole 14 of a coupling piece 15.
  • the coupling piece 15 is firmly connected to the swivel bracket 5.
  • the swivel bracket 5 is articulated on the housing 10 by means of an axis of rotation 16, so that swiveling of the swivel bracket 5 in the switch-off direction indicated by the arrow is made possible.
  • the main moving contact piece 2 is rotatably connected at its end facing away from the main fixed contact piece 3 to a drive shaft 17, by means of which a switch-off movement in the direction of the arrow shown can be generated.
  • the end of the main moving contact piece 2 facing the main fixed contact piece 3 passes over the circular path 18 indicated in FIG. 1 and thereby hits the free end of the pivoting bracket 5 with a snap mechanism 19, so that pivoting of the pivoting bracket 5 causes the pivoting bracket 5 to pivot.
  • the swivel bracket 5 covers a second circular path 19 with its end facing the main movement contact piece 2.
  • the main movement contact piece 2 and the swivel bracket 5 therefore remain in contact with one another until the disconnection contact pieces of the disconnection contact arrangement 6 come apart due to the different switching paths. This takes place at a waypoint 20 at which the circular paths 18 and 20 intersect again.
  • the main contact arrangement 4 is initially disconnected, but a current flow through an essentially through the erase contact arrangement 8 and the isolating contact clock arrangement 6 trained shunt branch is enabled. This also causes the swivel bracket 5 to pivot slightly, the driver pin 13a being moved within the elongated hole 14.
  • the isolating contact arrangement 6 With a further rotary movement, the isolating contact arrangement 6 finally reaches the position 21, in which the isolating contact arrangement 6 is disconnected without current.
  • a torsion spring not shown in FIG. 1, which after the separation of the
  • Isolating contact arrangement 6 causes the swivel bracket 5 to pivot back into the position shown in FIG. 1. In this position, the swivel bracket 5 rests on the main fixed contact piece 3.
  • FIG. 2 shows a further exemplary embodiment of the switch disconnector according to the invention and in particular illustrates the electrical and mechanical connection of the extinguishing contact arrangement 8 arranged in the vacuum tube 7 to the swivel bracket 5.
  • the extinguishing movement contact piece has a metallic and thus electrically conductive conductor strip 22 is connected to the swivel bracket 5.
  • the coupling piece 15, which is firmly connected to the swivel bracket 5 has a flange section 23, on which a contact pressure spring 24 is supported, via the end of which, facing away from the flange section 23, a pressing force can be introduced into the extinguishing contact arrangement.
  • Appropriate configurations of the elongated hole 14 thus enable a pressure force to be generated via the swivel bracket 5 of the coupling piece 15 and the contact spring 24, which is added to the force resulting from the pressure difference between the vacuum and the outside atmosphere.
  • FIG. 3 shows the snap mechanism 19 in more detail.
  • the snap mechanism 19 has a metallic snap bracket 25 which is articulated on a holding section 26 made of plastic.
  • the holding section 26 is fastened to the end of the swivel bracket 5 facing the main moving contact piece 2.
  • the snap-over bracket 25 has a driver nose 27 facing the main movement piece 3 and one of this averted stop arm 28, which rests on the swivel bracket 5 in the position shown.
  • the moving contact piece 2 rotates, in FIG. 3 from bottom to top, the main moving contact piece 2 strikes against the lower side of the driving lug 27, so that a rotating movement is initiated in the articulated snap-in bracket 25 and the stop arm 28 is lifted off the swivel bracket 5. In this way, the main movement contact piece 3 can slide past the swivel bracket 5.
  • the driver nose 27 slips over the circular path designated 29 in FIG.
  • the main movement contact piece 3 presses the driving lug 27 downwards and thus the stop arm 28 against the swivel bracket 5, so that the swivel bracket 5 is carried along by the main movement contact piece 2 in its downward movement.
  • the holding section 26 made of plastic ensures a defined current flow via the snap-in bracket 25. A current flowing via the shunt branch thus flows into the main moving contact piece 2 via the stop arm 28 and the driving lug 27.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

La présente invention concerne un disjoncteur à charge (1) destiné à interrompre un courant alternatif, comprenant un dispositif de contact principal (4) qui présente une pièce de contact mobile principale (2), et une ramification de dérivation connectée électriquement en parallèle du dispositif de contact principal (4), dans laquelle un dispositif de contact d'extinction (8) destiné à l'extinction d'un arc lumineux, et un dispositif de contact de séparation (6) composé de pièces de contact de séparation, destiné à fournir une résistance à la tension, sont connectés en série, un passage de courant par la ramification de dérivation, étant possible après ouverture du dispositif de contact principal (4). L'invention a pour objet de mettre à disposition un disjoncteur à charge de ce type, dont la construction est simplifiée et économique. A cet effet, la pièce de contact mobile principale (2) constitue dans le même temps l'une des pièces de contact de séparation du dispositif de contact de séparation (6).
PCT/DE2005/000151 2004-02-04 2005-01-27 Disjoncteur a charge WO2005076304A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004006476.8 2004-02-04
DE200410006476 DE102004006476B4 (de) 2004-02-04 2004-02-04 Lasttrennschalter

Publications (1)

Publication Number Publication Date
WO2005076304A1 true WO2005076304A1 (fr) 2005-08-18

Family

ID=34801850

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/000151 WO2005076304A1 (fr) 2004-02-04 2005-01-27 Disjoncteur a charge

Country Status (2)

Country Link
DE (1) DE102004006476B4 (fr)
WO (1) WO2005076304A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4455066B2 (ja) * 2004-01-08 2010-04-21 株式会社日立製作所 電気接点部材とその製法及びそれを用いた真空バルブ並びに真空遮断器
DE102005013231B3 (de) * 2005-03-18 2006-09-21 Siemens Ag Kurvenprofilschalter
FR2946180B1 (fr) * 2009-05-26 2012-12-14 Areva T & D Sa Dispositif d'accrochage et de verrouillage interne a un interrupteur ou a un disjoncteur.
DE102012200962B4 (de) 2012-01-24 2018-07-26 Siemens Aktiengesellschaft Schaltgerät, insbesondere Lasttrennschalter, für Mittelspannungs-Schaltanlagen
ES2601385T3 (es) 2012-06-25 2017-02-15 Siemens Aktiengesellschaft Seccionador en carga de tres posiciones para instalaciones de distribución de media tensión
ES2888700B2 (es) 2020-06-25 2022-05-18 Ormazabal Corporate Tech A I E Interruptor de corte en carga o de corrientes de cortocircuito
ES1275577Y (es) 2021-07-13 2021-10-26 Ormazabal Corporate Tech A I E Interruptor de corte en carga o de corrientes de cortocircuito y equipo eléctrico que incorpora dicho interruptor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955181A (en) * 1958-09-19 1960-10-04 Hi Voltage Equipment Company High voltage switch mechanism
US3026395A (en) * 1959-07-10 1962-03-20 Westinghouse Electric Corp Circuit interrupters
US3171004A (en) * 1961-07-18 1965-02-23 Joslyn Mfg & Supply Co Mechanism and circuitry for high voltage switching
FR2693834A1 (fr) * 1992-07-20 1994-01-21 Soule Sa Dispositif de coupure de ligne électrique comportant des moyens de confinement d'amorçage d'arc électrique.
US20020050484A1 (en) * 1999-07-14 2002-05-02 Rostron Joseph R. Limited restrike electric power circuit interrupter suitable for use as a line capacitor and load switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832493A1 (de) * 1988-09-22 1990-03-29 Siemens Ag Vakuumschaltroehre, eine solche schaltroehre enthaltender lasttrennschalter und verfahren zum betrieb eines solchen lasttrennschalters
DE19540552A1 (de) * 1995-10-31 1997-05-07 Driescher Spezialfab Fritz Trennschalter, insbesondere Mittelspannungs-Lasttrennschalter
DE19634451C1 (de) * 1996-08-26 1998-01-29 Driescher Eltech Werk Lastschalter
DE19918077C1 (de) * 1999-04-21 2000-11-09 Driescher Eltech Werk Lastschalter
DE10047032C2 (de) * 2000-09-22 2003-12-04 Elpro Gmbh Berlin Industriehol Mittelspannungs-Trennermessen-Lasttrennschalter mit Vakuum-Schaltkammern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955181A (en) * 1958-09-19 1960-10-04 Hi Voltage Equipment Company High voltage switch mechanism
US3026395A (en) * 1959-07-10 1962-03-20 Westinghouse Electric Corp Circuit interrupters
US3171004A (en) * 1961-07-18 1965-02-23 Joslyn Mfg & Supply Co Mechanism and circuitry for high voltage switching
FR2693834A1 (fr) * 1992-07-20 1994-01-21 Soule Sa Dispositif de coupure de ligne électrique comportant des moyens de confinement d'amorçage d'arc électrique.
US20020050484A1 (en) * 1999-07-14 2002-05-02 Rostron Joseph R. Limited restrike electric power circuit interrupter suitable for use as a line capacitor and load switch

Also Published As

Publication number Publication date
DE102004006476A1 (de) 2005-08-25
DE102004006476B4 (de) 2006-02-09

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