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EP3011575B1 - Device for transmission of forces - Google Patents

Device for transmission of forces Download PDF

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Publication number
EP3011575B1
EP3011575B1 EP14747005.8A EP14747005A EP3011575B1 EP 3011575 B1 EP3011575 B1 EP 3011575B1 EP 14747005 A EP14747005 A EP 14747005A EP 3011575 B1 EP3011575 B1 EP 3011575B1
Authority
EP
European Patent Office
Prior art keywords
housing
switching device
limb
leg
supporting plate
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
EP14747005.8A
Other languages
German (de)
French (fr)
Other versions
EP3011575A1 (en
Inventor
Ludvik Godesa
Martin Böttcher
Karsten Freundt
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 AG, Siemens Corp filed Critical Siemens AG
Publication of EP3011575A1 publication Critical patent/EP3011575A1/en
Application granted granted Critical
Publication of EP3011575B1 publication Critical patent/EP3011575B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/30—Electromagnetic relays specially adapted for actuation by AC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/101—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening
    • 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H2033/6648—Contacts containing flexible parts, e.g. to improve contact pressure
    • 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
    • H01H2033/6665—Details concerning the mounting or supporting of the individual vacuum bottles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/01—Spiral spring
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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

Definitions

  • the invention relates to a device for transmitting forces on a Beweg.an gleichbolzen a contact system of a moving contact and another contact of a switching device, with an at least partially flexible, provided for electrically connecting the Beweg.an gleichbolzens with a connection of the switching device guide element with at least one leg and a second leg which are arranged for mutual current flow, so as to generate an electromagnetic force, wherein the first leg is arranged stationarily in a housing of the switching device.
  • the force transfer device disclosed therein comprises an assembly having an at least partially flexible baffle having a first leg and a second leg arranged for counter current flow so as to generate an electromagnetic force and includes a latchable lever assembly through which the electromagnetic force on the one hand to increase the contact pressure force in the closed contact system and on the other hand in a turn-off operation to support the opening operation of the contact system is available.
  • the document " WO 93/20571 A1 discloses a device for transmitting forces on a BewegWalletan gleichbolzen a contact system, according to the preamble of claim 1.
  • the object of the present invention is to develop a device of the type mentioned, which has a simple structure.
  • the housing of the switching device on side walls bearing surfaces for the stationary arrangement of the first leg.
  • the housing of the switching device has an internal dimension between its side walls, which is slightly larger as an outer dimension of the support plate such that the support plate is slidably guided within the housing between the side walls of the housing.
  • the housing of the switching device has an inner dimension between a guide surface of a first terminal and a further guide element of a rear housing wall, which is slightly larger than an outer dimension of the support plate such that the support plate within the housing between the guide surface and the another guide element of the housing is slidably guided.
  • a sliding movable guide of the support plate is formed within the housing of the switching device in a simple manner , So that in particular advantageously occur in a short-circuit current transverse forces do not lead to a deflection or transverse stress of the entire arrangement, but are absorbed by the leadership of the support plate within the housing of the switching device of this, without transverse stresses such as Bewegumblean gleichbolzen or other movable Parts occur.
  • FIG. 1 shows a switching device 1 in the form of a circuit breaker with a three-phase arrangement, as used for example for power distribution in the medium voltage range.
  • a pole 2, 3, 4 is provided in each case with a housing 5.
  • the housing 5 is typically made of an insulating material, such as epoxy or other plastic, to the poles 2, 3 and 4 against each other electrically isolate.
  • the poles 3 and 4 have the same structure. For the sake of clarity and for the purpose of better description of the pole 4, only the pole housing is shown.
  • Each of the poles 2, 3 and 4 comprises a vacuum interrupter 6 with a arranged in a vacuum-tight housing, figuratively not apparent contact system of a moving contact and a fixed contact for switching or interrupting a guided through the switching device 1 current, in particular, for example, in a short circuit to a predetermined time the switching device 1 is provided for switching off the connected to the switching device 1 part of the power supply network.
  • the moving contact of the contact system of the vacuum interrupter 6 is brought out of the vacuum interrupter 6 vacuum-tight via a BewegCountan gleichbolzen 7 and mechanically coupled via a drive rod 8 with a figuratively also not shown drive for initiating a drive movement to open or close the contact system, wherein a figuratively not shown contact pressure spring via the drive rod exerts a contact pressure force on the moving contact of the vacuum interrupter in the closed state.
  • the drive rod 8 has an insulating element 10 provided with ribs 9 for electrical decoupling of the drive and moving contact connection bolts.
  • the BewegCountan gleichbolzen 7 is electrically connected to a first terminal 11 of the switching device 1 via a flexible conductor element 12 which is fixed contact of the contact system of the vacuum interrupter 6 electrically connected via a fixed contact connection pin to a second terminal 13 of the switching device 1, wherein the first terminal 11 and the second terminal 13 are provided for electrically conductive connection, for example with a switchgear or an energy distribution network.
  • the flexible conductor element 12 comprises a first leg 14, which is arranged stationarily in the housing 5, in which it rests on bearing surfaces 15 of the pole housing 5, which are better visible in the housing of the pole 4.
  • a second leg 16 of the flexible conductor element 12 is electrically conductively connected to the BewegCountan gleichbolzen 7 and guided on a fixed to the BewegTypean gleichbolzen 7 support plate along and held it.
  • the first leg 14 and the second leg 16 are arranged such that a guided through the switching device 1 current flows through the first leg 14 and the second leg 16 in opposite directions, so that an electromagnetic repulsive force between the first leg 14 and the second leg 16 is produced.
  • the second leg 16 is guided and held below the support plate 17 along this, so that such electromagnetic repulsive force between the first leg 14 and second leg 16 by the stationary arrangement of the first leg 14 on the bearing surfaces 15 of the housing 5 via the second leg 16 acts on the support plate and thus presses the Bewegumblean gleichbolzen 7 upwards in the embodiment and on the contact system of moving contact and fixed contact of the vacuum interrupter 6 exerts a contact pressure force which supports or increases the contact pressure force of the contact pressure spring 9 in the closed state of the contact system.
  • the housing 5 of the poles 2, 3 and 4 of the switching device 1 have between side walls 18 and 19 an inner dimension which is slightly larger than an outer dimension of the support plate 17 such that the support plate 17 within the housing 5 between the side walls 18 and 19th of the housing 5 of the poles 2, 3 and 4 is slidably guided, so that occurring lateral forces are absorbed at a short circuit current from the housing 5, in particular not to a deflection of movable Can lead parts such as the Bewegjoran gleichbolzen or the flexible conductor elements. Furthermore, the support plate is guided in addition to the lateral guide on the rear housing wall of the housing 5 and the front of a provided on the first terminal 11 guide member, as with respect to the FIG. 2 explained in more detail below.
  • FIG. 2 shows a detailed view of the pole 2 from the FIG. 1 with the vacuum interrupter 6 and the BewegCountan gleichbolzen 7, which is electrically connected via the flexible conductor element 12 to the first terminal 11.
  • the second leg 16 of the flexible conductor element 12, which is guided in the embodiment below the support plate 17 guided along this, is connected by means of fastening elements 20 with the BewegCountan gleichbolzen 7, the first leg 14 is electrically connected by means of fastening elements 21 to the first terminal 11.
  • the first leg 14 rests on the bearing surfaces 15 of the housing 5 of the switching device 1 and is thus arranged stationarily in the housing 5.
  • the insulator 10 of the drive rod 8 is also visible, as well as fasteners 22 for fixing the first terminal 11 on the housing 5.
  • the first terminal 11 further has a guide surface 23 on its side facing the support plate 17, which guide surface 23 together with a on the rear housing wall of the housing 5 provided further guide member 24 forms a guide of the support plate 17 by the distance between the guide surface 23 and the other guide member is slightly larger than the dimension of the support plate 17, such that here also a sliding guide is made possible by the analogous to the guide through the side walls 18 and 19 ensures a recording of forces and a deflection of moving parts is effectively suppressed by such forces.
  • the arrangement of the first leg 14 and second leg 16 for the opposite current flow is due to the opposing current flow a repulsive electromagnetic force generated between the first leg 14 and the second leg 16, which increases the contact pressure of the contact pressure spring and in particular at a short circuit current occurring leads to a significant increase in the contact pressure, so that in a short-circuit current, the contact system can be kept closed for a controlled time until a Short circuit is located in the power distribution network and then subsequently the contact system of the vacuum interrupter 6 can be opened to allow a shutdown of the connected via the switching device 1 to the power distribution network part.
  • Such a design of a device for transmitting forces to the BewegCountan gleichbolzen 7 makes it possible in a simple manner to use drives that require a low-cost and simple design and in particular comparatively low spring forces of the contact pressure spring, because by the electromagnetic force, the force of the contact pressure spring on the closed Contact system is increased, so that in such an arrangement higher short-circuit currents are manageable at comparatively low drive power and contact pressure spring force.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Übertragung von Kräften auf einem Bewegkontaktanschlussbolzen eines Kontaktsystems aus einem Bewegkontakt und einem weiteren Kontakt eines Schaltgerätes, mit einem zumindest teilweise flexiblen, zum elektrischen Verbinden des Bewegkontaktanschlussbolzens mit einem Anschluss des Schaltgerätes vorgesehenen Leitelement mit mindestens einem Schenkel und einem zweiten Schenkel, die zum gegenseitigen Stromfluss angeordnet sind, um so eine elektromagnetische Kraft zu erzeugen, wobei der erste Schenkel ortsfest in einem Gehäuse des Schaltgerätes angeordnet ist.The invention relates to a device for transmitting forces on a Bewegkontaktanschlussbolzen a contact system of a moving contact and another contact of a switching device, with an at least partially flexible, provided for electrically connecting the Bewegkontaktanschlussbolzens with a connection of the switching device guide element with at least one leg and a second leg which are arranged for mutual current flow, so as to generate an electromagnetic force, wherein the first leg is arranged stationarily in a housing of the switching device.

Eine derartige Vorrichtung zur Übertragung von Kräften ist aus der älteren Anmeldung DE 10 2012 216 974 der gleichen Anmelderin bekannt. Die dort offenbarte Vorrichtung zur Übertragung von Kräften weist eine Anordnung mit einem zumindest teilweise flexiblen Leitelement mit einem ersten Schenkel und einem zweiten Schenkel auf, die zum gegensinnigen Stromfluss angeordnet sind, um so eine elektromagnetische Kraft zu erzeugen und umfasst eine verklinkbare Hebelanordnung, durch die die elektromagnetische Kraft einerseits zur Erhöhung der Kontaktdruckkraft bei geschlossenem Kontaktsystem und andererseits bei einem Ausschaltvorgang zur Unterstützung des Öffnungsvorgangs des Kontaktsystems nutzbar ist. Das Dokument " WO 93/20571 A1 " offenbart eine Vorrichtung zur Übertragung von Kräften auf einem Bewegkontaktanschlussbolzen eines Kontaktsystems, gemäß dem Oberbegriff des Anspruchs 1. Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung der eingangs genannten Art weiterzubilden, welche über einen einfachen Aufbau verfügt.Such a device for transmitting forces is from the earlier application DE 10 2012 216 974 known to the same applicant. The force transfer device disclosed therein comprises an assembly having an at least partially flexible baffle having a first leg and a second leg arranged for counter current flow so as to generate an electromagnetic force and includes a latchable lever assembly through which the electromagnetic force on the one hand to increase the contact pressure force in the closed contact system and on the other hand in a turn-off operation to support the opening operation of the contact system is available. The document " WO 93/20571 A1 discloses a device for transmitting forces on a Bewegkontaktanschlussbolzen a contact system, according to the preamble of claim 1. The object of the present invention is to develop a device of the type mentioned, which has a simple structure.

Erfindungsgemäß gelöst wird dies bei einer Vorrichtung der eingangs genannten Art dadurch, dass der zweite Schenkel an einer fest mit dem Bewegkontaktanschlussbolzen verbundenen Stützplatte derart entlanggeführt und gehalten ist, dass eine in einem Kurzschluss auftretende elektromagnetische kraft zwischen dem ersten Schenkel und dem zweiten Schenkel zum Vergrößern einer von einer Kontaktdruckfeder ausgeübten Kontaktdruckkraft in dem Bewegkontaktanschlussbolzen einleitbar ist, wobei die Stützplatte in dem Gehäuse des Schaltgerätes gleitend beweglich geführt ist.This is achieved according to the invention in a device of the type mentioned above in that the second limb is guided along and held on a support plate connected fixedly to the Bewegkontaktanschlussbolzen such that an electromagnetic force occurring in a short circuit between the first leg and the second leg for increasing a contact pressure force exerted by a contact pressure spring in the Bewegkontaktanschlussbolzen is introduced, wherein the support plate is slidably guided in the housing of the switching device.

Durch eine derartige Anordnung des zweiten Schenkels entlang einer mit dem Bewegkontaktanschlussbolzen verbundenen Stützplatte derart, dass die in einem Kurzschlussfall bei einem hohen Kurzschluss auftretende elektromagnetische Kraft durch den gegensinnigen Stromfluss durch ersten und zweiten Schenkel über die fest mit dem Bewegkontaktanschlussbolzen verbundene Stützplatte in diesen eingeleitet wird, ist in einfacher Weise ermöglicht, dass die Kontaktdruckkraft, welche durch die Kontaktdruckfeder auf den Bewegkontaktanschlussbolzen ausgeübt wird, durch diese elektromagnetische Kraft erhöht wird, so dass im Kurzschlussfall bei einem hohen Kurzschlussstrom zunächst ein Öffnungsfordern des Kontaktsystems für eine bestimmte Zeit verhindert wird. Dies ist nötig, da das Kontaktsystem eines Schaltgerätes auch in einem Kurzschlussfall eine kontrollierte Zeit geschlossen gehalten werden muss, um den Kurzschluss in einem Energieverteilungssystem lokalisieren zu können.By such an arrangement of the second leg along a support plate connected to the Bewegkontaktanschlussbolzen such that the occurring in a short circuit in a high short circuit electromagnetic force is initiated by the opposite current flow through the first and second leg on the fixedly connected to the Bewegkontaktanschlussbolzen support plate in this is easily enables the contact pressure force exerted by the contact pressure spring on the Bewegkontaktanschlussbolzen is increased by this electromagnetic force, so that in case of short circuit at a high short-circuit current initially opening request of the contact system for a certain time is prevented. This is necessary because the contact system of a switching device must be kept closed even in a short circuit a controlled time to localize the short circuit in an energy distribution system can.

In einer vorteilhaften Weiterbildung der Erfindung weist das Gehäuse des Schaltgerätes an Seitenwänden Auflageflächen zur ortsfesten Anordnung des ersten Schenkels auf. Durch derartige Auflageflächen im Gehäuse des Schaltgerätes ist in einfacher Weise eine ortsfeste Lagerung des ersten Schenkels im Gehäuse ermöglicht, so dass durch die Anordnung vom ersten und zweiten Schenkel zum gegenseitigen Stromfluss die entstehende elektromagnetische Abstoßungskraft zwischen erstem und zweitem Schenkel wirksam über die Stützplatte in den Bewegkontaktanschlussbolzen eingeleitet werden kann.In an advantageous embodiment of the invention, the housing of the switching device on side walls bearing surfaces for the stationary arrangement of the first leg. By such contact surfaces in the housing of the switching device a stationary mounting of the first leg in the housing is made possible, so that the arrangement of the first and second leg for mutual current flow, the resulting electromagnetic repulsive force between the first and second leg effectively on the support plate in the Bewegkontaktanschlussbolzen can be initiated.

In einer besonders vorteilhaften Ausgestaltung der Erfindung weist das Gehäuse des Schaltgerätes eine Innenabmessung zwischen seinen Seitenwänden auf, welche geringfügig größer ist als eine Außenabmessung der Stützplatte derart, dass die Stützplatte innerhalb des Gehäuses zwischen den Seitenwänden des Gehäuses gleitend beweglich geführt ist. In weiterer vorteilhafter Ausgestaltung der Erfindung weist das Gehäuse des Schaltgerätes eine Innenabmessung zwischen einer Führungsfläche eines ersten Anschlusses und einem weiteren Führungselement einer hinteren Gehäusewand auf, welche geringfügig größer ist als eine Außenabmessung der Stützplatte derart, dass die Stützplatte innerhalb des Gehäuses zwischen der Führungsfläche und dem weiteren Führungselement des Gehäuses gleitend beweglich geführt ist.In a particularly advantageous embodiment of the invention, the housing of the switching device has an internal dimension between its side walls, which is slightly larger as an outer dimension of the support plate such that the support plate is slidably guided within the housing between the side walls of the housing. In a further advantageous embodiment of the invention, the housing of the switching device has an inner dimension between a guide surface of a first terminal and a further guide element of a rear housing wall, which is slightly larger than an outer dimension of the support plate such that the support plate within the housing between the guide surface and the another guide element of the housing is slidably guided.

Durch derartige Innenabmessungen zwischen den Seitenwänden des Gehäuses des Schaltgerätes bzw. zwischen einer Führungsfläche eines ersten Anschlusses und einem weiteren Führungselement einer hinteren Gehäusewand, welche der Außenabmessung der Stützplatte angepasst sind, ist in einfacher Weise eine gleitend bewegliche Führung der Stützplatte innerhalb des Gehäuses des Schaltgerätes ausgebildet, so dass insbesondere in vorteilhafter Weise die bei einem Kurzschlussstrom auftretenden Querkräfte nicht zu einer Auslenkung bzw. Querbeanspruchung der gesamten Anordnung führen, sondern durch die Führung der Stützplatte innerhalb des Gehäuses des Schaltgerätes von diesem aufgenommen werden, ohne dass Querbeanspruchungen beispielsweise von Bewegkontaktanschlussbolzen oder anderen beweglichen Teilen auftreten.By such inner dimensions between the side walls of the housing of the switching device or between a guide surface of a first terminal and another guide element of a rear housing wall, which are adapted to the outer dimension of the support plate, a sliding movable guide of the support plate is formed within the housing of the switching device in a simple manner , So that in particular advantageously occur in a short-circuit current transverse forces do not lead to a deflection or transverse stress of the entire arrangement, but are absorbed by the leadership of the support plate within the housing of the switching device of this, without transverse stresses such as Bewegkontaktanschlussbolzen or other movable Parts occur.

Die Erfindung wird im Folgenden anhand der Zeichnung und eines Ausführungsbeispiels mit Bezug auf die beiliegenden Figuren näher erläutert. Es zeigen:

Fig. 1
eine dreidimensionale schematische Ansicht einer erfindungsgemäßen Vorrichtung in einem Schaltgerät;
Fig. 2
eine Detailansicht des Ausführungsbeispiels der Fig. 1.
The invention will be explained in more detail below with reference to the drawing and an embodiment with reference to the accompanying figures. Show it:
Fig. 1
a three-dimensional schematic view of a device according to the invention in a switching device;
Fig. 2
a detailed view of the embodiment of the Fig. 1 ,

Figur 1 zeigt ein Schaltgerät 1 in Form eines Leistungsschalters mit einer dreiphasigen Anordnung, wie er beispielsweise zur Energieverteilung im Mittelspannungsbereich eingesetzt wird. Für jede Phase des Schaltgerätes 1 ist ein Pol 2, 3, 4 jeweils mit einem Gehäuse 5 vorgesehen. In der Detaildarstellung der Figur 2 ist dabei das Gehäuse 5 des Poles 2 der Figur 1 der besseren Übersichtlichkeit halber teilweise transparent dargestellt, wobei das Gehäuse 5 typischerweise aus einem isolierenden Material, beispielsweise Epoxidharz oder einem anderen Kunststoff, ausgebildet ist, um die Pole 2, 3 und 4 gegeneinander elektrisch zu isolieren. Weiterhin wird im Folgenden lediglich der Pol 2 näher beschrieben. Die Pole 3 und 4 weisen den gleichen Aufbau auf. Der Übersichtlichkeit halber und zum Zwecke der besseren Beschreibung ist vom Pol 4 lediglich das Polgehäuse dargestellt. Jeder der Pole 2, 3 und 4 umfasst eine Vakuumschaltröhre 6 mit einem in einem vakuumdichten Gehäuse angeordneten, figürlich nicht ersichtlichen Kontaktsystem aus einem Bewegkontakt und einem Festkontakt zum Schalten bzw. Unterbrechen eines über das Schaltgerät 1 geführten Stromes, wobei insbesondere beispielsweise in einem Kurzschlussfall nach einer vorbestimmten Zeit das Schaltgerät 1 zum Abschalten des mit dem Schaltgerät 1 verbundenen Teiles des Energieversorgungsnetzes vorgesehen ist. Der Bewegkontakt des Kontaktsystems der Vakuumschaltröhre 6 ist über einen Bewegkontaktanschlussbolzen 7 vakuumdicht aus der Vakuumschaltröhre 6 herausgeführt und über eine Antriebsstange 8 mit einem figürlich ebenfalls nicht dargestellten Antrieb zum Einleiten einer Antriebsbewegung zum Öffnen bzw. Schließen des Kontaktsystems mechanisch gekoppelt, wobei eine figürlich nicht dargestellte Kontaktdruckfeder über die Antriebsstange eine Kontaktdruckkraft auf den Bewegkontakt der Vakuumschaltröhre im geschlossenen Zustand ausübt. Die Antriebsstange 8 weist ein mit Rippen 9 versehenes isolierendes Element 10 zur elektrischen Entkopplung von Antrieb und Bewegkontaktanschlussbolzen auf. Der Bewegkontaktanschlussbolzen 7 ist mit einem ersten Anschluss 11 des Schaltgerätes 1 über einen flexibles Leiterelement 12 elektrisch leitend verbunden, der Festkontakt des Kontaktsystems der Vakuumschaltröhre 6 ist über einen Festkontaktanschlussbolzen mit einem zweiten Anschluss 13 des Schaltgerätes 1 elektrisch leitend verbunden, wobei der erste Anschluss 11 und der zweite Anschluss 13 zum elektrisch leitenden Verbinden beispielsweise mit einer Schaltanlage bzw. einem Energieverteilungsnetz vorgesehen sind. Das flexible Leiterelement 12 umfasst einen ersten Schenkel 14, welcher ortsfest im Gehäuse 5 angeordnet ist, in dem er auf Auflageflächen 15 des Polgehäuses 5 aufliegt, die im Gehäuse des Poles 4 besser ersichtlich sind. Ein zweiter Schenkel 16 des flexiblen Leiterelementes 12 ist elektrisch leitend mit dem Bewegkontaktanschlussbolzen 7 verbunden und an einer fest mit dem Bewegkontaktanschlussbolzen 7 verbundenen Stützplatte entlang geführt und daran gehalten. Der erste Schenkel 14 und der zweite Schenkel 16 sind dabei derart angeordnet, dass ein über das Schaltgerät 1 geführter Strom den ersten Schenkel 14 und den zweiten Schenkel 16 gegensinnig durchfließt, so dass eine elektromagnetische abstoßende Kraft zwischen dem ersten Schenkel 14 und dem zweiten Schenkel 16 erzeugt wird. Der zweite Schenkel 16 ist dabei unterhalb der Stützplatte 17 entlang dieser geführt und gehalten, so dass eine derartige elektromagnetische Abstoßungskraft zwischen erstem Schenkel 14 und zweitem Schenkel 16 durch die ortsfeste Anordnung des ersten Schenkels 14 an den Auflageflächen 15 des Gehäuses 5 über den zweiten Schenkel 16 auf die Stützplatte wirkt und damit den Bewegkontaktanschlussbolzen 7 nach oben im Ausführungsbeispiel drückt und auf das Kontaktsystem aus Bewegkontakt und Festkontakt der Vakuumschaltröhre 6 eine Kontaktdruckkraft ausübt, welche die Kontaktdruckkraft der Kontaktdruckfeder 9 im geschlossenen Zustand des Kontaktsystems unterstützt bzw. vergrößert. Die Gehäuse 5 der Pole 2, 3 und 4 des Schaltgerätes 1 weisen dabei zwischen Seitenwänden 18 und 19 eine Innenabmessung auf, welche geringfügig größer ist als eine Außenabmessung der Stützplatte 17 derart, dass die Stützplatte 17 innerhalb des Gehäuses 5 zwischen den Seitenwänden 18 und 19 des Gehäuses 5 der Pole 2, 3 und 4 gleitend beweglich geführt ist, so dass auftretende Querkräfte bei einem Kurzschlussstrom vom Gehäuse 5 aufgenommen werden, um insbesondere nicht zu einer Auslenkung von beweglichen Teilen wie beispielsweise dem Bewegkontaktanschlussbolzen oder der flexiblen Leiterelemente führen können. Weiterhin ist die Stützplatte neben der seitlichen Führung auch an der hinteren Gehäusewand des Gehäuses 5 und vorne an einem am ersten Anschluss 11 vorgesehenen Führungselement geführt, wie mit Bezug auf die Figur 2 weiter unten näher erläutert. FIG. 1 shows a switching device 1 in the form of a circuit breaker with a three-phase arrangement, as used for example for power distribution in the medium voltage range. For each phase of the switching device 1, a pole 2, 3, 4 is provided in each case with a housing 5. In the detail of the FIG. 2 is the case 5 of the pole 2 of Figure 1 for the sake of clarity, partially transparent, wherein the housing 5 is typically made of an insulating material, such as epoxy or other plastic, to the poles 2, 3 and 4 against each other electrically isolate. Furthermore, only the pole 2 will be described in more detail below. The poles 3 and 4 have the same structure. For the sake of clarity and for the purpose of better description of the pole 4, only the pole housing is shown. Each of the poles 2, 3 and 4 comprises a vacuum interrupter 6 with a arranged in a vacuum-tight housing, figuratively not apparent contact system of a moving contact and a fixed contact for switching or interrupting a guided through the switching device 1 current, in particular, for example, in a short circuit to a predetermined time the switching device 1 is provided for switching off the connected to the switching device 1 part of the power supply network. The moving contact of the contact system of the vacuum interrupter 6 is brought out of the vacuum interrupter 6 vacuum-tight via a Bewegkontaktanschlussbolzen 7 and mechanically coupled via a drive rod 8 with a figuratively also not shown drive for initiating a drive movement to open or close the contact system, wherein a figuratively not shown contact pressure spring via the drive rod exerts a contact pressure force on the moving contact of the vacuum interrupter in the closed state. The drive rod 8 has an insulating element 10 provided with ribs 9 for electrical decoupling of the drive and moving contact connection bolts. The Bewegkontaktanschlussbolzen 7 is electrically connected to a first terminal 11 of the switching device 1 via a flexible conductor element 12 which is fixed contact of the contact system of the vacuum interrupter 6 electrically connected via a fixed contact connection pin to a second terminal 13 of the switching device 1, wherein the first terminal 11 and the second terminal 13 are provided for electrically conductive connection, for example with a switchgear or an energy distribution network. The flexible conductor element 12 comprises a first leg 14, which is arranged stationarily in the housing 5, in which it rests on bearing surfaces 15 of the pole housing 5, which are better visible in the housing of the pole 4. A second leg 16 of the flexible conductor element 12 is electrically conductively connected to the Bewegkontaktanschlussbolzen 7 and guided on a fixed to the Bewegkontaktanschlussbolzen 7 support plate along and held it. The first leg 14 and the second leg 16 are arranged such that a guided through the switching device 1 current flows through the first leg 14 and the second leg 16 in opposite directions, so that an electromagnetic repulsive force between the first leg 14 and the second leg 16 is produced. The second leg 16 is guided and held below the support plate 17 along this, so that such electromagnetic repulsive force between the first leg 14 and second leg 16 by the stationary arrangement of the first leg 14 on the bearing surfaces 15 of the housing 5 via the second leg 16 acts on the support plate and thus presses the Bewegkontaktanschlussbolzen 7 upwards in the embodiment and on the contact system of moving contact and fixed contact of the vacuum interrupter 6 exerts a contact pressure force which supports or increases the contact pressure force of the contact pressure spring 9 in the closed state of the contact system. The housing 5 of the poles 2, 3 and 4 of the switching device 1 have between side walls 18 and 19 an inner dimension which is slightly larger than an outer dimension of the support plate 17 such that the support plate 17 within the housing 5 between the side walls 18 and 19th of the housing 5 of the poles 2, 3 and 4 is slidably guided, so that occurring lateral forces are absorbed at a short circuit current from the housing 5, in particular not to a deflection of movable Can lead parts such as the Bewegkontaktanschlussbolzen or the flexible conductor elements. Furthermore, the support plate is guided in addition to the lateral guide on the rear housing wall of the housing 5 and the front of a provided on the first terminal 11 guide member, as with respect to the FIG. 2 explained in more detail below.

Figur 2 zeigt eine Detailansicht des Poles 2 aus der Figur 1 mit der Vakuumschaltröhre 6 und dem Bewegkontaktanschlussbolzen 7, welcher über das flexible Leiterelement 12 elektrisch leitend mit dem ersten Anschluss 11 verbunden ist. Der zweite Schenkel 16 des flexiblen Leiterelementes 12, welcher im Ausführungsbeispiel unterhalb der Stützplatte 17 entlanggeführt an dieser gehalten ist, ist mittels Befestigungselementen 20 mit dem Bewegkontaktanschlussbolzen 7 verbunden, der erste Schenkel 14 ist mittels Befestigungselementen 21 mit dem ersten Anschluss 11 elektrisch leitend verbunden. Der erste Schenkel 14 liegt auf den Auflageflächen 15 des Gehäuses 5 des Schaltgerätes 1 auf und ist damit ortsfest im Gehäuse 5 angeordnet. Der Isolator 10 der Antriebsstange 8 ist ebenfalls ersichtlich, wie auch Befestigungselemente 22 zur Befestigung des ersten Anschlusses 11 am Gehäuse 5. Der erste Anschluss 11 weist weiterhin eine Führungsfläche 23 an seiner der Stützplatte 17 zugewandten Seite auf, welche Führungsfläche 23 zusammen mit einem an der hinteren Gehäusewand des Gehäuses 5 vorgesehenen weiteren Führungselement 24 eine Führung der Stützplatte 17 bildet, indem der Abstand zwischen der Führungsfläche 23 und dem weiteren Führungselement geringfügig größer ist als die Abmessung der Stützplatte 17, derart, dass hier ebenfalls eine gleitend bewegliche Führung ermöglicht ist, durch die analog zur Führung durch die Seitenwände 18 und 19 eine Aufnahme von Kräften gewährleistet und eine Auslenkung beweglicher Teile durch solche Kräfte wirksam unterdrückt ist. FIG. 2 shows a detailed view of the pole 2 from the FIG. 1 with the vacuum interrupter 6 and the Bewegkontaktanschlussbolzen 7, which is electrically connected via the flexible conductor element 12 to the first terminal 11. The second leg 16 of the flexible conductor element 12, which is guided in the embodiment below the support plate 17 guided along this, is connected by means of fastening elements 20 with the Bewegkontaktanschlussbolzen 7, the first leg 14 is electrically connected by means of fastening elements 21 to the first terminal 11. The first leg 14 rests on the bearing surfaces 15 of the housing 5 of the switching device 1 and is thus arranged stationarily in the housing 5. The insulator 10 of the drive rod 8 is also visible, as well as fasteners 22 for fixing the first terminal 11 on the housing 5. The first terminal 11 further has a guide surface 23 on its side facing the support plate 17, which guide surface 23 together with a on the rear housing wall of the housing 5 provided further guide member 24 forms a guide of the support plate 17 by the distance between the guide surface 23 and the other guide member is slightly larger than the dimension of the support plate 17, such that here also a sliding guide is made possible by the analogous to the guide through the side walls 18 and 19 ensures a recording of forces and a deflection of moving parts is effectively suppressed by such forces.

Durch die Anordnung vom ersten Schenkel 14 und zweitem Schenkel 16 zum gegensinnigen Stromfluss wird durch den gegensinnigen Stromfluss eine abstoßende elektromagnetische Kraft zwischen dem ersten Schenkel 14 und dem zweiten Schenkel 16 erzeugt, welche die Kontaktdruckkraft der Kontaktdruckfeder erhöht und insbesondere bei einem auftretenden Kurzschlussstrom zu einer deutlichen Erhöhung der Kontaktdruckkraft führt, so dass bei einem Kurzschlussstrom das Kontaktsystem für eine kontrollierte Zeit geschlossen gehalten werden kann, bis ein Kurzschluss im Energieverteilungsnetz lokalisiert ist und dann anschließend das Kontaktsystem der Vakuumschaltröhre 6 geöffnet werden kann, um ein Abschalten des über das Schaltgerät 1 mit dem Energieverteilungsnetz verbundenen Teiles zu ermöglichen.The arrangement of the first leg 14 and second leg 16 for the opposite current flow is due to the opposing current flow a repulsive electromagnetic force generated between the first leg 14 and the second leg 16, which increases the contact pressure of the contact pressure spring and in particular at a short circuit current occurring leads to a significant increase in the contact pressure, so that in a short-circuit current, the contact system can be kept closed for a controlled time until a Short circuit is located in the power distribution network and then subsequently the contact system of the vacuum interrupter 6 can be opened to allow a shutdown of the connected via the switching device 1 to the power distribution network part.

Eine derartige Ausbildung einer Vorrichtung zur Übertragung von Kräften auf den Bewegkontaktanschlussbolzen 7 ermöglicht es in einfacher Weise, Antriebe zu verwenden, die einen kostengünstigen und einfachen Aufbau und insbesondere vergleichsweise geringe Federkräfte der Kontaktdruckfeder erfordern, weil durch die elektromagnetische Kraft die Kraft der Kontaktdruckfeder auf das geschlossene Kontaktsystem erhöht wird, so dass bei einer derartigen Anordnung höhere Kurzschlussströme handhabbar sind bei vergleichsweise geringer Antriebsleistung und Kontaktdruckfederkraft.Such a design of a device for transmitting forces to the Bewegkontaktanschlussbolzen 7 makes it possible in a simple manner to use drives that require a low-cost and simple design and in particular comparatively low spring forces of the contact pressure spring, because by the electromagnetic force, the force of the contact pressure spring on the closed Contact system is increased, so that in such an arrangement higher short-circuit currents are manageable at comparatively low drive power and contact pressure spring force.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Schaltgerätswitchgear
2,3,42,3,4
PolePole
55
Gehäusecasing
66
VakuumschaltröhreVacuum interrupter
77
BewegkontaktanschlussbolzenBewegkontaktanschlussbolzen
88th
Antriebsstangedrive rod
99
KontaktdruckfederContact pressure spring
1010
Isolatorinsulator
1111
erster Anschlussfirst connection
1212
flexibles Leiterelementflexible conductor element
1313
zweiter Anschlusssecond connection
1414
erster Schenkelfirst leg
1515
Auflageflächebearing surface
1616
zweiter Schenkelsecond leg
1717
Stützplattesupport plate
18,1918.19
Seitenwändeside walls
20,21,2220,21,22
Befestigungselementefasteners
2323
Führungsflächeguide surface
2424
weiteres Führungselementanother guide element

Claims (4)

  1. Apparatus for transmitting forces on a moving contact connection pin (7) of a contact system comprising a moving contact and a further contact of a switching device (1), having an at least partially flexible conductor element (12) which is provided for electrically connecting the moving contact connection pin (7) to a connection of the switching device (1) and has at least one first limb (14) and one second limb (16) which are arranged for reciprocal current flow in order to thereby generate an electromagnetic force, wherein the first limb (14) is arranged in a stationary manner in a housing (5) of the switching device (1),
    wherein
    the second limb (16) is guided along and held on a supporting plate (17), which is fixedly connected to the moving contact connection pin (7), in such a way that an electromagnetic force which occurs in a short circuit can be introduced between the first limb (14) and the second limb (16) in order to increase a contact pressure force, which is exerted by a contact compression spring (9), in the moving contact connection pin (7), characterized in that the supporting plate (17) is guided such that it can move in a sliding manner in the housing (5) of the switching device (1).
  2. Apparatus according to Claim 1,
    characterized in that
    the housing (5) of the switching device (1) has, on side walls (18, 19), bearing surfaces (15) for arranging the first limb (14) in a stationary manner.
  3. Apparatus according to Claim 2,
    characterized in that
    the housing (5) of the switching device (1) has an internal dimension between its side walls (18, 19) which is slightly larger than an external dimension of the supporting plate (17) in such a way that the supporting plate (17) is guided within the housing (5) such that it can move in a sliding manner between the side walls (18, 19) of the housing (5).
  4. Apparatus according to Claim 2 or 3,
    characterized in that
    the housing (5) of the switching device (1) has an internal dimension between a guide surface (23) of a first connection (11) and a further guide element (24) of a rear housing wall which is slightly larger than an external dimension of the supporting plate (17) in such a way that the supporting plate (15) is guided within the housing (5) such that it can move in a sliding manner between the guide surface (23) and the further guide element (24) of the housing (5).
EP14747005.8A 2013-08-13 2014-07-31 Device for transmission of forces Active EP3011575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013216018.6A DE102013216018B4 (en) 2013-08-13 2013-08-13 Device for transmitting forces
PCT/EP2014/066454 WO2015022194A1 (en) 2013-08-13 2014-07-31 Device for transmission of forces

Publications (2)

Publication Number Publication Date
EP3011575A1 EP3011575A1 (en) 2016-04-27
EP3011575B1 true EP3011575B1 (en) 2017-08-30

Family

ID=51263390

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Application Number Title Priority Date Filing Date
EP14747005.8A Active EP3011575B1 (en) 2013-08-13 2014-07-31 Device for transmission of forces

Country Status (8)

Country Link
US (1) US10043623B2 (en)
EP (1) EP3011575B1 (en)
JP (1) JP2016528700A (en)
KR (1) KR101895135B1 (en)
CN (1) CN105408977B (en)
DE (1) DE102013216018B4 (en)
WO (1) WO2015022194A1 (en)
ZA (1) ZA201600447B (en)

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CN106098471B (en) * 2016-08-21 2018-06-05 沈通科技有限公司 A kind of high-pressure vacuum breaker
DE102020132655A1 (en) * 2020-12-08 2022-06-09 Te Connectivity Germany Gmbh Contact bridge for an electrical switching element and electrical switching element

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Also Published As

Publication number Publication date
KR20160030557A (en) 2016-03-18
DE102013216018B4 (en) 2021-06-02
CN105408977A (en) 2016-03-16
WO2015022194A1 (en) 2015-02-19
EP3011575A1 (en) 2016-04-27
ZA201600447B (en) 2017-04-26
DE102013216018A1 (en) 2015-02-19
KR101895135B1 (en) 2018-10-04
US20160181037A1 (en) 2016-06-23
CN105408977B (en) 2018-07-06
US10043623B2 (en) 2018-08-07
JP2016528700A (en) 2016-09-15

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