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EP1800322B1 - Coupling device comprising a cooling element - Google Patents

Coupling device comprising a cooling element Download PDF

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Publication number
EP1800322B1
EP1800322B1 EP05794669A EP05794669A EP1800322B1 EP 1800322 B1 EP1800322 B1 EP 1800322B1 EP 05794669 A EP05794669 A EP 05794669A EP 05794669 A EP05794669 A EP 05794669A EP 1800322 B1 EP1800322 B1 EP 1800322B1
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EP
European Patent Office
Prior art keywords
conductor
connection piece
coupling apparatus
coupling device
cooling
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Application number
EP05794669A
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German (de)
French (fr)
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EP1800322A1 (en
Inventor
Ralf-Reiner Volkmar
Thomas Erk
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Siemens AG
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Siemens AG
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/58Electric connections to or between contacts; Terminals
    • H01H1/5822Flexible connections between movable contact and terminal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/6606Terminal arrangements
    • H01H2033/6613Cooling arrangements directly associated with the terminal arrangements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/6606Terminal arrangements

Definitions

  • the invention relates to a coupling device for electrically connecting a first conductor to a second conductor.
  • the invention further relates to a solid-insulated switch pole with an electrically non-conductive insulating housing and arranged in the insulating housing interrupter, which extends between an input terminal and a stationary outgoing terminal, wherein an axially movable switching rod is provided for initiating a drive movement in the interrupter.
  • a coupling device and a solid-insulated switch pole for example, from DE 19 71 21 82 A1 already known.
  • the coupling device shown there has as a first connection piece on a clamping part which is fixedly connected to an axially movable switching rod as the first conductor.
  • the second connection piece is arranged stationarily in an insulating housing consisting of casting resin in which the switching rod is guided in an axially movable manner.
  • the shift rod is rigidly connected to a moving contact of a vacuum interrupter, which is firmly embedded in the insulating material.
  • the coupling device In order to enable an electrical connection of the movable switching rod with the stationary embedded in the insulating housing connection piece, the coupling device has a flexible metallic conductor strip, which is connected on both sides with a respective connecting piece. Since there are high current transfer resistances, in particular at the contact points of the conductor strip, it depends on these Provide a comparatively high dependent on the size of the rated current heat development. In order to prevent damage to the switch pole, the current-related heating of the switch pole should not exceed 65 - 75 degrees Kelvin. Due to the resulting continuous current carrying capacity of the coupling device, the maximum permissible rated current of the switch pole is limited.
  • the previously known coupling device has the disadvantage that the heat dissipation essentially takes place only via the heat conduction of the flexible current band, which dissipates the heat arising at the first connection piece to the second connection piece.
  • the second connector is thermally conductively connected to outside of the insulating housing arranged conductors so that the heat can be discharged in this way to the outside atmosphere.
  • a switch is known in which an axially movable switching rod is connected by means of a flexible connecting means with a connecting piece to allow relative movement between a first conductor and a second conductor.
  • a cooling unit for discharging heat generated in the switch.
  • a switch in which a first conductor is connected to a second conductor, wherein a first connection piece and a second connection piece for connection of first and second conductor are provided, wherein the first connection piece via a flexible connecting means is connected to the second connector to allow relative movement between the first conductor and the second conductor.
  • the switch disclosed there has, as a first connection piece, a clamping part for clamping to an axially movable switching rod.
  • the object of the invention is to provide a coupling device and a solid-state switch pole of the type mentioned above, which have an improved continuous current carrying capacity with constant heating.
  • the cooling no longer takes place, as in the prior art, solely via the heat conduction of the connecting means.
  • the inventively provided Cooling unit causes additional local cooling of the coupling device, whereby the heating of the coupling device is significantly reduced. In this way, it is possible within the scope of the invention to carry higher rated currents through the coupling device, without leaving the range of permissible temperature increase.
  • the cooling unit according to the invention can be configured as desired.
  • the cooling unit may have water cooling.
  • Essential within the scope of the invention is merely that the cooling unit for the purpose of cooling with one or more of the remaining components of the coupling device is thermally conductively connected.
  • the cooling unit has a heat sink with cooling fins.
  • the cooling fins By the cooling fins, the heat exchange surface of the coupling device is considerably increased.
  • the length and spacing of the cooling ribs are to be optimized so that on the one hand the largest possible heat exchange surface is provided.
  • flow-related minimum distances between the cooling fins are to be maintained in order to allow the highest possible flow velocity of the air between the cooling fins of the heat sink. If the distance of the cooling fins is too small depending on their length, the speed of the air flow between the cooling fins is reduced by air turbulence.
  • the arrangement of the heat sink is arbitrary.
  • the heat sink is thermally conductively connected to the first connection piece.
  • Such a variant of the invention is particularly useful when the largest heat development takes place at the first connector.
  • the flexible connecting means comprise at least one flexible conductor strip.
  • a conductor band provides a cost-effective and less maintenance-prone connecting means between the Connectors, however, at higher voltages in the range of about 100 KV field distribution problems may occur.
  • a first contact surface of each conductor strip with the first connection piece and a second contact surface with the second connection piece are each at least twice as large as the cross-sectional area of the conductor strip.
  • the heat transfer surfaces between the conductor strip and the connecting pieces are increased.
  • high current transfer losses with increased heat development occur in particular at the transition surfaces.
  • Increasing the transition surfaces leads to a reduction of the current transition densities and thus to a reduction of the heat development at the junctions between the conductor strip and the connection piece.
  • Each conductor strip is therefore not only soldered, for example, bluntly with its end face to the respective connection piece, but optionally has, in addition to the end face on a side surface, whereby the respective connector is contacted.
  • a step-shaped cutout is provided in the connection piece.
  • each conductor strip has a flexible bending section whose length is smaller than 0.1 mm -1 in relation to its cross-sectional area. According to this development, the heat development is optimized in the conductor strip, since at such a ratio at a constant rated current of the area-related current in the conductor strip and thus the heating is reduced in this.
  • the first connection piece is a clamping part for clamping to an axially movable switching rod.
  • the second connection piece has a passage opening through which a switching rod can pass freely.
  • a shift rod can be clamped to the first connector, wherein the second connector is embedded, for example, in the sheath of a solid-insulated switch pole.
  • the object of the invention is also achieved by a solid-insulated switch pole of the type mentioned, which has a coupling device according to the invention, which connects the shift rod and the outgoing terminal electrically.
  • the interrupter is embedded in the insulating housing, which has a venting channel cooperating with the cooling unit.
  • the interrupter preferably a vacuum interrupter, adjoins with its outer casing, with the exception of the drive parts, a non-conductive solid, so that air circulation inside the insulating casing without the venting channel is made more difficult.
  • the vent channel is expediently arranged with its inlet opening above the cooling unit during operation of the switch pole and extends straight upwards.
  • FIG. 1 shows a perspective view of an embodiment of the coupling device 1 according to the invention, which has a clamping part 2 as a first connector as well as a stationary connector 3 as a second connector.
  • the two connecting pieces 2 and 3 are electrically connected to one another via two flexible current bands 4.
  • the clamping part 2 has a clamping recess 5, which is provided for receiving a switching rod of a solid-insulated switch pole.
  • the clamping part 2 has two sections 6 and 7, whose distance can be varied by clamping screws 8. By means of the clamping screws 8, the clamping part 2 can therefore be firmly clamped to the shift rod.
  • a heat sink 9 with cooling fins 10 can be seen on the clamping part, the heat is conductively connected to the clamping part 2 and in this way increases the heat exchange surface of the coupling device 1.
  • FIG. 2 shows the coupling device 1 according to FIG. 1 from behind.
  • the clamping part 2 has at its sections 6 and 7 in each case a step-shaped cutout 11, on which the Stromband 4 is soldered with its front end portion fixed to the clamping part 2.
  • step-shaped cutout 11 soldering is possible both on the end face 12 of each current band 4 and on the flat side 13 in the end-side end region, whereby the current transfer surfaces increased and the heat generation is reduced by current transfer.
  • a conventional screw connection 14 is provided, the current bands 4 lying flat on the stationary connection piece 3, so that here too large exchange surfaces are provided for reducing the heat.
  • FIG. 3 shows the coupling device according to FIG. 1 in a top view on the top.
  • the cooling fins 10 have a different depth, so that a cylindrical outer contour or envelope and thus the installation in hollow cylindrical space, such as in tubular insulating material, is possible.
  • FIG. 4 shows the coupling device 1 from below, wherein the cooling body 9 has been removed from the clamping part 2. It can be seen that the connection between the heat sink 9 and clamping part 2 via a screw connection. In this view, it can also be seen that the stationary connection piece 3 for the free passage of a shift rod has a passage opening 15 which has a larger inner diameter than the shift rod.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Installation Of Bus-Bars (AREA)
  • Patch Boards (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Transformer Cooling (AREA)

Abstract

A coupling device for electrically connecting a first conductor to a second conductor has a first connecting piece to connect the first conductor and a second connecting piece to connect the second conductor. The first connecting piece is joined to the second connecting piece via flexible connecting means or sliding or rolling connecting means such that a relative movement can be performed between the first conductor and the second conductor. In order to create a coupling device that features improved constant current stability while heating remains at the same level, a cooling unit is provided for cooling the coupling device.

Description

Die Erfindung betrifft eine Kupplungsvorrichtung zum elektrischen Verbinden eines ersten Leiters mit einem zweiten Leiter.The invention relates to a coupling device for electrically connecting a first conductor to a second conductor.

Die Erfindung betrifft ferner einen feststoffisolierten Schalterpol mit einem elektrisch nicht leitenden Isolierstoffgehäuse und einer in dem Isolierstoffgehäuse angeordneten Schaltröhre, die sich zwischen einem Eingangsanschluss und einem ortsfesten Abgangsanschluss erstreckt, wobei eine axial bewegliche Schaltstange zum Einleiten einer Antriebsbewegung in die Schaltröhre vorgesehen ist.The invention further relates to a solid-insulated switch pole with an electrically non-conductive insulating housing and arranged in the insulating housing interrupter, which extends between an input terminal and a stationary outgoing terminal, wherein an axially movable switching rod is provided for initiating a drive movement in the interrupter.

Eine Kupplungsvorrichtung und ein feststoffisolierter Schalterpol sind beispielsweise aus der DE 19 71 21 82 A1 bereits bekannt. Die dort gezeigte Kupplungsvorrichtung weist als erstes Anschlussstück ein Klemmteil auf, das fest mit einer axial beweglichen Schaltstange als ersten Leiter verbunden ist. Das zweite Anschlussstück ist ortsfest in einem aus Gießharz bestehenden Isolierstoffgehäuse angeordnet, in dem die Schaltstange axial beweglich geführt ist. Dabei ist die Schaltstange mit einem Bewegkontakt einer Vakuumschaltröhre starr verbunden, die in dem Isolierstoffgehäuse fest eingebettet ist. Um eine elektrische Verbindung der beweglichen Schaltstange mit dem ortsfest in dem Isolierstoffgehäuse eingebetteten Anschlussstück zu ermöglichen, weist die Kupplungsvorrichtung ein flexibles metallisches Leiterband auf, das beidseitig mit jeweils einem Anschlussstück verbunden ist. Da insbesondere an den Kontaktstellen des Leiterbandes hohe Stromübergangswiderstände vorliegen, kommt es an diesen Stellen zu einer vergleichsweise hohen von der Größe des Nennstromes abhängigen Wärmeentwicklung. Um Schäden an dem Schalterpol zu vermeiden, sollte die strombedingte Erwärmung des Schalterpols 65 - 75 Grad Kelvin nicht überschreiten. Durch die daraus resultierende Dauerstromtragfähigkeit der Kupplungsvorrichtung ist der maximal zulässige Nennstrom des Schalterpols begrenzt.A coupling device and a solid-insulated switch pole, for example, from DE 19 71 21 82 A1 already known. The coupling device shown there has as a first connection piece on a clamping part which is fixedly connected to an axially movable switching rod as the first conductor. The second connection piece is arranged stationarily in an insulating housing consisting of casting resin in which the switching rod is guided in an axially movable manner. In this case, the shift rod is rigidly connected to a moving contact of a vacuum interrupter, which is firmly embedded in the insulating material. In order to enable an electrical connection of the movable switching rod with the stationary embedded in the insulating housing connection piece, the coupling device has a flexible metallic conductor strip, which is connected on both sides with a respective connecting piece. Since there are high current transfer resistances, in particular at the contact points of the conductor strip, it depends on these Provide a comparatively high dependent on the size of the rated current heat development. In order to prevent damage to the switch pole, the current-related heating of the switch pole should not exceed 65 - 75 degrees Kelvin. Due to the resulting continuous current carrying capacity of the coupling device, the maximum permissible rated current of the switch pole is limited.

Der vorbekannten Kupplungsvorrichtung haftet der Nachteil an, dass die Wärmeableitung im Wesentlichen nur über die Wärmeleitung des flexiblen Strombandes erfolgt, das die an dem ersten Anschlussstück entstehende Wärme zum zweiten Anschlussstück hin ableitet. Das zweite Anschlussstück ist wärmeleitend mit außerhalb des Isolierstoffgehäuses angeordnet Leitern verbunden, so dass die Wärme auf diese Weise an die Außenatmosphäre abgegeben werden kann.The previously known coupling device has the disadvantage that the heat dissipation essentially takes place only via the heat conduction of the flexible current band, which dissipates the heat arising at the first connection piece to the second connection piece. The second connector is thermally conductively connected to outside of the insulating housing arranged conductors so that the heat can be discharged in this way to the outside atmosphere.

Aus der US 5 753 875 ist ein Schalter bekannt, bei welchem eine axial bewegliche Schaltstange mittels eines flexiblen Verbindungsmittels mit einem Anschlussstück verbunden ist, um eine Relativbewegung zwischen einem ersten Leiter und einem zweiten Leiter zu ermöglichen. An der Schaltstange angeordnet ist eine Kühleinheit zum Abführen von in dem Schalter entstehender Wärme.From the US 5,753,875 For example, a switch is known in which an axially movable switching rod is connected by means of a flexible connecting means with a connecting piece to allow relative movement between a first conductor and a second conductor. Arranged on the shift rod is a cooling unit for discharging heat generated in the switch.

Aus der EP 0 058 519 A2 ist ein Schalter bekannt, bei welchem ein erster Leiter mit einem zweiten Leiter verbunden ist, wobei ein erstes Anschlussstück und ein zweites Anschlussstück zum Anschluss von erstem bzw. zweitem Leiter vorgesehen sind, wobei das erste Anschlussstück über ein flexibles Verbindungsmittel mit dem zweiten Anschlussstück verbunden ist, um eine Relativbewegung zwischen dem ersten Leiter und dem zweiten Leiter zu ermöglichen. Der dort offenbarte Schalter weist als erstes Anschlussstück ein Klemmteil zum Anklemmen an eine axial bewegliche Schaltstange auf.From the EP 0 058 519 A2 a switch is known in which a first conductor is connected to a second conductor, wherein a first connection piece and a second connection piece for connection of first and second conductor are provided, wherein the first connection piece via a flexible connecting means is connected to the second connector to allow relative movement between the first conductor and the second conductor. The switch disclosed there has, as a first connection piece, a clamping part for clamping to an axially movable switching rod.

Aufgabe der Erfindung ist es eine Kupplungsvorrichtung und einen feststoffisolierten Schalterpol der eingangs genannten Art bereit zu stellen, die eine verbesserte Dauerstromtragfähigkeit bei gleich bleibender Erwärmung aufweisen.The object of the invention is to provide a coupling device and a solid-state switch pole of the type mentioned above, which have an improved continuous current carrying capacity with constant heating.

Die Erfindung löst diese Aufgabe durch eine Kupplungsvorrichtung (1) zum elektrischen Verbinden eines ersten Leiters mit einem zweiten Leiter, die ein erstes Anschlussstück (2) zum Anschluss des ersten Leiters und ein zweites Anschlussstück (3) zum Anschluss des zweiten Leiters aufweist,

  • wobei das erste Anschlussstück (2) über flexible Verbindungsmittel (4) mit dem zweiten Anschlussstück verbunden ist, so dass eine Relativbewegung zwischen erstem Leiter und zweitem Leiter ermöglicht ist,
  • wobei das erste Anschlussstück ein Klemmteil (2) zum Anklemmen an eine axial bewegliche Schaltstange ist,
  • wobei das zweite Anschlussstück (3) eine von einer Schaltstange frei durchgreifbare Durchgangsöffnung (15) aufweist, und
  • wobei eine Kühleinheit (9) zum Kühlen der Kupplungsvorrichtung (1) wärmeleitend unmittelbar mit dem Klemmteil (2) verbunden ist.
The invention achieves this object by a coupling device (1) for electrically connecting a first conductor to a second conductor, which has a first connection piece (2) for connecting the first conductor and a second connection piece (3) for connecting the second conductor,
  • wherein the first connecting piece (2) is connected to the second connecting piece via flexible connecting means (4), so that a relative movement between the first conductor and the second conductor is made possible,
  • the first connection piece being a clamping part (2) for clamping to an axially movable switching rod,
  • wherein the second connecting piece (3) has a freely engageable by a switching rod through opening (15), and
  • wherein a cooling unit (9) for cooling the coupling device (1) is thermally conductively connected directly to the clamping part (2).

Erfindungsgemäß erfolgt die Kühlung nicht mehr wie im Stand der Technik allein über die Wärmeleitung der Verbindungsmittel. Die erfindungsgemäß vorgesehene Kühleinheit bewirkt eine zusätzliche ortsnahe Kühlung der Kupplungsvorrichtung, wodurch die Erwärmung der Kupplungsvorrichtung deutlich herabgesetzt wird. Auf diese Weise ist es im Rahmen der Erfindung möglich, höhere Nennströme über die Kupplungsvorrichtung zu führen, ohne dabei den Bereich der zulässigen Temperaturerhöhung zu verlassen. Die Kühleinheit kann erfindungsgemäß beliebig ausgestaltet sein. So kann die Kühleinheit beispielsweise eine Wasserkühlung aufweisen. Wesentlich im Rahmen der Erfindung ist lediglich, dass die Kühleinheit zum Zwecke der Kühlung mit einem oder mehreren der restlichen Bauteile der Kupplungsvorrichtung wärmeleitend verbunden ist.According to the invention, the cooling no longer takes place, as in the prior art, solely via the heat conduction of the connecting means. The inventively provided Cooling unit causes additional local cooling of the coupling device, whereby the heating of the coupling device is significantly reduced. In this way, it is possible within the scope of the invention to carry higher rated currents through the coupling device, without leaving the range of permissible temperature increase. The cooling unit according to the invention can be configured as desired. For example, the cooling unit may have water cooling. Essential within the scope of the invention is merely that the cooling unit for the purpose of cooling with one or more of the remaining components of the coupling device is thermally conductively connected.

Gemäß einer bevorzugten Ausgestaltung der Erfindung weist die Kühleinheit einen Kühlkörper mit Kühlrippen auf. Durch die Kühlrippen wird die Wärmeaustauschfläche der Kupplungsvorrichtung beträchtlich erhöht. Länge und Abstand der Kühlrippen sind dahingehend zu optimieren, dass zum einen eine möglichst große Wärmeaustauschfläche bereitgestellt ist. Zum anderen sind jedoch auch strömungstechnisch bedingte Mindestabstände zwischen den Kühlrippen einzuhalten, um eine möglichst hohen Strömungsgeschwindigkeit der Luft zwischen den Kühlrippen des Kühlkörpers zu ermöglichen. Wird der Abstand der Kühlrippen in Abhängigkeit ihrer Länge zu klein, wird die Geschwindigkeit des Luftstromes zwischen den Kühlrippen durch Luftverwirbelung herabgesetzt.According to a preferred embodiment of the invention, the cooling unit has a heat sink with cooling fins. By the cooling fins, the heat exchange surface of the coupling device is considerably increased. The length and spacing of the cooling ribs are to be optimized so that on the one hand the largest possible heat exchange surface is provided. On the other hand, however, flow-related minimum distances between the cooling fins are to be maintained in order to allow the highest possible flow velocity of the air between the cooling fins of the heat sink. If the distance of the cooling fins is too small depending on their length, the speed of the air flow between the cooling fins is reduced by air turbulence.

Grundsätzlich ist die Anordnung des Kühlkörpers beliebig. Zweckmäßigerweise ist der Kühlkörper jedoch mit dem ersten Anschlussstück wärmeleitend verbunden. Eine solche Variante der Erfindung ist insbesondere dann zweckmäßig, wenn an dem ersten Anschlussstück die größte Wärmeentwicklung erfolgt.In principle, the arrangement of the heat sink is arbitrary. Conveniently, however, the heat sink is thermally conductively connected to the first connection piece. Such a variant of the invention is particularly useful when the largest heat development takes place at the first connector.

Bei einer bevorzugten Variante der Erfindung weisen die flexiblen verbindungsmittel wenigstens ein flexibles Leiterband auf. Ein Leiterband stellt ein kostengünstiges und wenig wartungsanfälliges Verbindungsmittel zwischen den Anschlussstücken dar, wobei jedoch bei höheren Spannungen im Bereich von über 100 KV Feldverteilungsprobleme auftreten können.In a preferred variant of the invention, the flexible connecting means comprise at least one flexible conductor strip. A conductor band provides a cost-effective and less maintenance-prone connecting means between the Connectors, however, at higher voltages in the range of about 100 KV field distribution problems may occur.

Vorteilhafterweise sind eine erste Kontaktfläche jedes Leiterbandes mit dem ersten Anschlussstück und eine zweite Kontaktfläche mit dem zweiten Anschlussstück jeweils wenigstens doppelt so groß wie die Querschnittsfläche des Leiterbandes. Gemäß dieser vorteilhaften Weiterentwicklung der Erfindung werden die Wärmeübergangsflächen zwischen dem Leiterband und den Anschlussstücken vergrößert. Wie bereits ausgeführt wurde, kommt es insbesondere an den Übergangsflächen zu hohen Stromübergangsverlusten mit einer erhöhten Wärmeentwicklung im Gefolge. Durch die Vergrößerung der Übergangsflächen kommt es zu einer Verringerung der Stromübergangsdichten und somit zur Verringerung der Wärmeentwicklung an den Übergängen zwischen Leiterband und Anschlussstück. Jedes Leiterband ist daher beispielsweise nicht nur stumpf mit seiner Stirnseite an das jeweilige Anschlussstück verlötet, sondern weist gegebenenfalls zusätzlich zur Stirnseite eine Seitenfläche auf, womit das jeweilige Anschlussstück kontaktiert wird. In diesem Fall ist in dem Anschlussstück eine stufenförmige Ausfräsung vorgesehen.Advantageously, a first contact surface of each conductor strip with the first connection piece and a second contact surface with the second connection piece are each at least twice as large as the cross-sectional area of the conductor strip. According to this advantageous development of the invention, the heat transfer surfaces between the conductor strip and the connecting pieces are increased. As has already been stated, high current transfer losses with increased heat development occur in particular at the transition surfaces. Increasing the transition surfaces leads to a reduction of the current transition densities and thus to a reduction of the heat development at the junctions between the conductor strip and the connection piece. Each conductor strip is therefore not only soldered, for example, bluntly with its end face to the respective connection piece, but optionally has, in addition to the end face on a side surface, whereby the respective connector is contacted. In this case, a step-shaped cutout is provided in the connection piece.

Gemäß einer vorteilhaften Weiterentwicklung weist jedes Leiterband einen flexiblen Biegeabschnitt auf, dessen Länge im Verhältnis zu dessen Querschnittsfläche kleiner als 0,1 mm-1 ist. Gemäß dieser Weiterentwicklung wird die Wärmeentwicklung im Leiterband optimiert, da bei einem solchen Verhältnis bei gleich bleibendem Nennstrom der flächenbezogene Strom im Leiterband und somit die Erwärmung in diesem herabgesetzt wird.According to an advantageous further development, each conductor strip has a flexible bending section whose length is smaller than 0.1 mm -1 in relation to its cross-sectional area. According to this development, the heat development is optimized in the conductor strip, since at such a ratio at a constant rated current of the area-related current in the conductor strip and thus the heating is reduced in this.

Vorteilhafterweise ist das erste Anschlussstück ein Klemmteil zum Anklemmen an eine axial bewegliche Schaltstange. Gemäß dieser Weiterentwicklung ist die Montage der Kupplungsvorrichtung vereinfacht. Insbesondere bei feststoffisolierten Leiterpolen ist eine einfache Montage innerhalb begrenzter Bauvolumina ermöglicht, so dass die Montage- und Wartungsarbeiten beschleunigt sind.Advantageously, the first connection piece is a clamping part for clamping to an axially movable switching rod. According to this development, the assembly of the Coupling device simplified. Particularly in the case of solid-insulated conductor poles, simple assembly is possible within limited construction volumes, so that the assembly and maintenance work is accelerated.

Zweckmäßigerweise weist das zweite Anschlussstück eine von einer Schaltstange frei durchgreifbare Durchgangsöffnung auf. Auf diese Weise kann eine Schaltstange mit dem ersten Anschlussstück verklemmt werden, wobei das zweite Anschlussstück beispielsweise in der Ummantelung eines feststoffisolierten Schalterpols eingebettet ist.Expediently, the second connection piece has a passage opening through which a switching rod can pass freely. In this way, a shift rod can be clamped to the first connector, wherein the second connector is embedded, for example, in the sheath of a solid-insulated switch pole.

Die Aufgabe der Erfindung wird auch durch einen feststoffisolierten Schalterpol der eingangs genannten Art gelöst, der eine erfindungsgemäße Kupplungsvorrichtung aufweist, welche die Schaltstange und den Abgangsanschluss elektrisch miteinander verbindet.The object of the invention is also achieved by a solid-insulated switch pole of the type mentioned, which has a coupling device according to the invention, which connects the shift rod and the outgoing terminal electrically.

Bei einer diesbezüglichen Weiterentwicklung ist die Schaltröhre in dem Isolierstoffgehäuse eingebettet, das über einen mit der Kühleinheit zusammen wirkenden Entlüftungskanal verfügt. Bei dieser Variante der Erfindung grenzt die Schaltröhre, vorzugsweise eine Vakuumschaltröhre, mit ihrem Außengehäuse mit Ausnahme der Antriebsteile an einen nicht leitenden Feststoff an, so dass eine Luftzirkulation im Inneren des Isolierstoffgehäuses ohne den Entlüftungskanal erschwert ist. Der Entlüftungskanal ist bei Betrieb des Schalterpols zweckmäßigerweise mit seiner Eintrittsöffnung oberhalb der Kühleinheit angeordnet und erstreckt sich gradlinig nach oben.In a related development, the interrupter is embedded in the insulating housing, which has a venting channel cooperating with the cooling unit. In this variant of the invention, the interrupter, preferably a vacuum interrupter, adjoins with its outer casing, with the exception of the drive parts, a non-conductive solid, so that air circulation inside the insulating casing without the venting channel is made more difficult. The vent channel is expediently arranged with its inlet opening above the cooling unit during operation of the switch pole and extends straight upwards.

Weitere zweckmäßige Ausgestaltungen und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung unter Bezug auf die Figuren der Zeichnung, wobei gleiche Bezugszeichen auf gleichwirkende Bauteile verweisen und wobei

Figur 1
eine perspektivische Vorderansicht eines Ausführungsbeispiels der erfindungsgemäßen Kupplungsvorrichtung,
Figur 2
eine perspektivische Ansicht der Rückseite der Kupplungsvorrichtung gemäß Figur 1,
Figur 3
eine perspektivische Draufsicht auf die Oberseite der Kupplungsvorrichtung gemäß Figur 1 und
Figur 4
eine perspektivische Draufsicht auf die Unterseite der Kupplungsvorrichtung gemäß Figur 1 ohne Kühleinheit zeigen.
Further expedient embodiments and advantages of the invention are the subject of the following description of embodiments of the invention with reference to the figures of the drawing, wherein like reference numerals refer to like-acting components and wherein
FIG. 1
a perspective front view of an embodiment of the coupling device according to the invention,
FIG. 2
a perspective view of the back of the coupling device according to FIG. 1 .
FIG. 3
a perspective top view of the top of the coupling device according to FIG. 1 and
FIG. 4
a perspective top view of the underside of the coupling device according to FIG. 1 without cooling unit show.

Figur 1 zeigt eine perspektivische Ansicht eines Ausführungsbeispiels der erfindungsgemäßen Kupplungsvorrichtung 1, die über ein Klemmteil 2 als erstes Anschlussstück so wie über ein ortsfestes Anschlussstück 3 als zweites Anschlussstück verfügt. Die beiden Anschlussstücke 2 und 3 sind über zwei flexible Strombänder 4 elektrisch miteinander verbunden. FIG. 1 shows a perspective view of an embodiment of the coupling device 1 according to the invention, which has a clamping part 2 as a first connector as well as a stationary connector 3 as a second connector. The two connecting pieces 2 and 3 are electrically connected to one another via two flexible current bands 4.

Das Klemmteil 2 weist eine Klemmausnehmung 5 auf, die zur Aufnahme einer Schaltstange eines feststoffisolierten Schalterpols vorgesehen ist. Dabei verfügt das Klemmteil 2 über zwei Abschnitte 6 und 7, deren Abstand durch Klemmschrauben 8 variierbar ist. Mittels der Klemmschrauben 8 kann das Klemmteil 2 daher fest mit der Schaltstange verklemmt werden. An dem Klemmteil ist ferner ein Kühlkörper 9 mit Kühlrippen 10 erkennbar, der Wärme leitend mit dem Klemmteil 2 verbunden ist und auf diese Weise die Wärmeaustauschfläche der Kupplungsvorrichtung 1 vergrößert.The clamping part 2 has a clamping recess 5, which is provided for receiving a switching rod of a solid-insulated switch pole. In this case, the clamping part 2 has two sections 6 and 7, whose distance can be varied by clamping screws 8. By means of the clamping screws 8, the clamping part 2 can therefore be firmly clamped to the shift rod. Furthermore, a heat sink 9 with cooling fins 10 can be seen on the clamping part, the heat is conductively connected to the clamping part 2 and in this way increases the heat exchange surface of the coupling device 1.

Figur 2 zeigt die Kupplungsvorrichtung 1 gemäß Figur 1 von hinten. In dieser perspektivischen Ansicht der Rückseite ist erkennbar, dass das Klemmteil 2 an seinen Abschnitten 6 und 7 jeweils eine stufenförmige Ausfräsung 11 aufweist, an der das Stromband 4 mit seinem stirnseitigen Endbereich fest mit dem Klemmteil 2 verlötet ist. Durch die stufenförmige Ausfräsung 11 ist ein Verlöten sowohl an der Stirnfläche 12 jedes Strombandes 4 als auch an deren Flachseite 13 im stirnseitigen Endbereich ermöglicht, wodurch die Stromübergangsflächen vergrößert und die Wärmeentwicklung durch Stromübergang herabgesetzt ist. Zur Verbindung der Strombänder 4 mit dem ortsfesten Anschlussstück 3 ist eine übliche Schraubverbindung 14 vorgesehen, wobei die Strombänder 4 flächig auf dem ortsfesten Anschlussstück 3 aufliegen, so dass auch hier große Austauschflächen zur Wärmereduzierung bereitgestellt sind. FIG. 2 shows the coupling device 1 according to FIG. 1 from behind. In this perspective view of the back, it can be seen that the clamping part 2 has at its sections 6 and 7 in each case a step-shaped cutout 11, on which the Stromband 4 is soldered with its front end portion fixed to the clamping part 2. By step-shaped cutout 11 soldering is possible both on the end face 12 of each current band 4 and on the flat side 13 in the end-side end region, whereby the current transfer surfaces increased and the heat generation is reduced by current transfer. To connect the current bands 4 to the fixed connection piece 3, a conventional screw connection 14 is provided, the current bands 4 lying flat on the stationary connection piece 3, so that here too large exchange surfaces are provided for reducing the heat.

Figur 3 zeigt die Kupplungsvorrichtung gemäß Figur 1 in einer Draufsicht auf die Oberseite. In dieser Ansicht ist erkennbar, dass die Kühlrippen 10 eine unterschiedliche Tiefe aufweisen, so dass eine zylindrische Außenkontur oder Einhüllende und damit der Einbau auch in hohlzylindrischen Bauräumen, wie beispielsweise in röhrenförmige Isolierstoffgehäuse, ermöglicht ist. FIG. 3 shows the coupling device according to FIG. 1 in a top view on the top. In this view, it can be seen that the cooling fins 10 have a different depth, so that a cylindrical outer contour or envelope and thus the installation in hollow cylindrical space, such as in tubular insulating material, is possible.

Figur 4 zeigt die Kupplungsvorrichtung 1 von unten, wobei der Kühlkörper 9 vom Klemmteil 2 entfernt wurde. Es ist erkennbar, dass die Verbindung zwischen Kühlkörper 9 und Klemmteil 2 über eine Schraubverbindung erfolgt. In dieser Ansicht ist ferner erkennbar, dass das ortsfeste Anschlussstück 3 für den freien Durchtritt einer Schaltstange eine Durchgangsöffnung 15 aufweist, welche einen größeren Innendurchmesser aufweist als die Schaltstange. FIG. 4 shows the coupling device 1 from below, wherein the cooling body 9 has been removed from the clamping part 2. It can be seen that the connection between the heat sink 9 and clamping part 2 via a screw connection. In this view, it can also be seen that the stationary connection piece 3 for the free passage of a shift rod has a passage opening 15 which has a larger inner diameter than the shift rod.

Claims (7)

  1. Coupling apparatus (1) for electrically connecting a first conductor to a second conductor, which coupling apparatus has a first connection piece (2) for connecting the first conductor and a second connection piece (3) for connecting the second conductor,
    - the first connection piece (2) being connected to the second connection piece via flexible connecting means (4), with the result that a relative movement between the first conductor and the second conductor is made possible,
    - the first connection piece being a clamping part (2) to be clamped onto an axially movable switching rod, characterized in that the second connection piece (3) has a through-opening (15) through which a switching rod can pass freely, and
    - a cooling unit (9) for cooling the coupling apparatus (1) being thermally conductively connected directly to the clamping part (2).
  2. Coupling apparatus (1) according to claim 1, characterized in that the cooling unit has at least one heat sink (9) with cooling ribs (10).
  3. Coupling apparatus (1) according to the preceding claims, characterized in that the flexible connecting means comprises at least one flexible conductor strip (4).
  4. Coupling apparatus (1) according to Claim 3, characterized in that a first contact area (12, 13) of each conductor strip (4) with the first connection piece (2) and a second contact area of the conductor strip (4) with the second connection piece (3) are each twice as large as the cross-sectional area of the conductor strip (4).
  5. Coupling apparatus (1) according to Claim 3 or 4, characterized in that each conductor strip (4) has a flexible bending section, whose length in relation to its cross-sectional area is less than 0.1 mm-1.
  6. Solid-insulated switch pole having an electrically nonconductive insulating-material housing and an interrupter tube, which is arranged in the insulating-material housing and extends between an input connection and a fixed output connection, an axially movable switching rod for introducing a drive movement into the interrupter tube being provided, characterized by a coupling apparatus (9) according to one of the preceding claims, which connects the switching rod and the output connection electrically to one another.
  7. Solid-insulated switch pole according to Claim 6, characterized in that the interrupter tube is embedded in the insulating-material housing, which has a ventilation channel interacting with the cooling unit (9).
EP05794669A 2004-10-14 2005-09-20 Coupling device comprising a cooling element Active EP1800322B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004050786A DE102004050786C5 (en) 2004-10-14 2004-10-14 Coupling device with heat sink
PCT/EP2005/054688 WO2006040243A1 (en) 2004-10-14 2005-09-20 Coupling device comprising a cooling element

Publications (2)

Publication Number Publication Date
EP1800322A1 EP1800322A1 (en) 2007-06-27
EP1800322B1 true EP1800322B1 (en) 2011-04-06

Family

ID=35351952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05794669A Active EP1800322B1 (en) 2004-10-14 2005-09-20 Coupling device comprising a cooling element

Country Status (9)

Country Link
US (1) US20070264856A1 (en)
EP (1) EP1800322B1 (en)
KR (1) KR20070064613A (en)
CN (1) CN101036208B (en)
AT (1) ATE504930T1 (en)
DE (2) DE102004050786C5 (en)
ES (1) ES2360512T3 (en)
RU (1) RU2374716C2 (en)
WO (1) WO2006040243A1 (en)

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Also Published As

Publication number Publication date
ES2360512T3 (en) 2011-06-06
US20070264856A1 (en) 2007-11-15
WO2006040243A1 (en) 2006-04-20
KR20070064613A (en) 2007-06-21
DE502005011226D1 (en) 2011-05-19
EP1800322A1 (en) 2007-06-27
ATE504930T1 (en) 2011-04-15
CN101036208A (en) 2007-09-12
DE102004050786C5 (en) 2008-03-06
DE102004050786A1 (en) 2006-04-27
RU2007117699A (en) 2008-11-20
CN101036208B (en) 2010-06-16
DE102004050786B4 (en) 2006-08-24
RU2374716C2 (en) 2009-11-27

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