EP2413338A1 - Switching device with cooling device - Google Patents

Switching device with cooling device Download PDF

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Publication number
EP2413338A1
EP2413338A1 EP10008006A EP10008006A EP2413338A1 EP 2413338 A1 EP2413338 A1 EP 2413338A1 EP 10008006 A EP10008006 A EP 10008006A EP 10008006 A EP10008006 A EP 10008006A EP 2413338 A1 EP2413338 A1 EP 2413338A1
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EP
European Patent Office
Prior art keywords
cooling
switching device
heat
entwärmungsvorrichtung
fixed contact
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.)
Granted
Application number
EP10008006A
Other languages
German (de)
French (fr)
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EP2413338B1 (en
Inventor
Wolfgang Feil
Rainer Kreutzer
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
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Siemens AG
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
Priority to EP10008006.8A priority Critical patent/EP2413338B1/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to BR112013002339-2A priority patent/BR112013002339B1/en
Priority to PCT/EP2011/061049 priority patent/WO2012013440A1/en
Priority to US13/811,050 priority patent/US9799462B2/en
Priority to CN201180034646.6A priority patent/CN103003905B/en
Priority to KR1020137005094A priority patent/KR101578341B1/en
Priority to EP11730945A priority patent/EP2564407A1/en
Publication of EP2413338A1 publication Critical patent/EP2413338A1/en
Application granted granted Critical
Publication of EP2413338B1 publication Critical patent/EP2413338B1/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts

Definitions

  • the invention relates to a switching device, in particular a circuit breaker with a thermal release, to which a movable contact piece is arranged via a contact bridge carrier, which is mounted on a spring body and is arranged opposite of fixed contact pieces.
  • Circuit-breakers are developed in various sizes.
  • One size is composed of device variants with a meaningful series of rated current. As the rated current of a device increases, its power dissipation increases disproportionately.
  • the device variant with the highest rated current for a given size is determined by the fact that just for this stream of power loss remains at a given housing volume without adverse consequences for the requirement of the switching device over its lifetime. If you want to get even higher rated currents, you develop a larger design. From the customer's point of view, however, it is desirable to increase the maximum rated current within one size even further. To achieve this, measures must be taken to make the heat transport from the housing volume technically more efficient.
  • the object of the present invention is therefore to provide a switching device that allows a space-optimized Entskyrmungsrea.
  • a switching device in particular a circuit breaker with a thermal release, on which a contact bridge carrier a movable contact piece is arranged, which is mounted on a spring body and is arranged opposite of fixed contact pieces.
  • the invention is characterized in that a cooling device made of a heat dissipating material is arranged laterally on the fixed contact pieces.
  • these outlying ribs primarily serve to increase the insulation distance, ie the clearance and creepage distance between the individual poles of devices. If the thermal blanket of the thermally poorly conducting ribbed plastic remains small enough heat can be dissipated to the environment. If the ribs additionally extend over the entire height of the device, the surface dissipating to the surrounding air heat is relatively large. Incidentally, these ribs remain in the arrangement of the devices close to tight in contrast to the device side surfaces uncovered and thus extremely effective. An electrical operator contact protection of the metallic cooling vanes is given by the plastic sheath.
  • An advantage of the cooling device according to the invention is that a second effective current path Entracermungsweg was found so that larger power losses are dissipated, so that higher rated current densities of the devices are made possible with a constant volume.
  • a constructive advantage is that the heat-emitting surfaces are not buildable or not covered. This can be done an efficient heat dissipation.
  • the triggering behavior of the device is favorably influenced.
  • the cooling device according to the invention thus achieves both a reduction in the temperature level and an improvement in the limiting current tripping behavior.
  • the cooling device is formed of a heat-conducting material, in particular a cooling plate.
  • a cooling plate are advantageously designed as cooling fins, which also allow efficient heat transfer.
  • the cooling device is arranged on the fixed contact pieces as well as on a connecting tongue of the thermal release.
  • This lateral placement of the cooling device according to the invention on the fixed contact pieces allows a space-optimized arrangement that allows the effective heat transfer.
  • the Entracermungsvorraum is arranged in the chamber partitions of the switching device.
  • the cooling surfaces according to the invention are isolated in this way and positioned optimally positioned between the phase barriers of the switching devices.
  • the cooling surfaces if they are arranged between the phases beyond the basic body of the device, can be extended on one or both sides into external, possibly insulated, ribs. The advantage is that the heat dissipation through these external large-area fins is extremely efficient because of the direct contact with the surrounding air.
  • the switching devices especially for circuit breakers, a second effective current path-Entskyrmungsweg is made possible, so that larger power losses are dissipated, so that higher rated current densities of the devices are possible with constant volume.
  • the heat dissipation surfaces are integrated in the form of cooling plates so space optimized in the switching device that the surfaces are neither installed nor covered. Due to the consideration of the contact point from the second Entracermungsweges in the cooling plates is advantageously a favorable decoupling of the thermal release of heat technical fluctuations of the contact transition point, whereby the tripping behavior of the switching device is favorably influenced.
  • the space-optimized cooling device described here thus makes it possible to lower the overall temperature level as well as to improve the limiting current tripping behavior.
  • Fig. 1 shows a switching device 1, in particular a circuit breaker with a thermal release 2, to which a movable contact piece 4 is arranged via a contact bridge carrier 3.
  • the movable contact piece 4 is designed as a movable contact bridge with two contact points 5, 6.
  • the movable contact piece 4 is mounted on a spring element 7 in the contact bridge carrier 3 and opposite to the fixed contact pieces 8, 9, respectively.
  • the fixed contact pieces 8, 9 are arranged on the right or left of the contact bridge carrier 3 and each have a contact point 10, 11, which meet in a switching operation on the contact points 5, 6 of the movable contact piece 4.
  • the fixed contact 8 is preferably U-shaped and has an extension 12, which leads to a terminal 13.
  • the fixed contact 9 is also U-shaped with a long and a short leg, the shorter leg leads via an extension 14 to the thermal release 2. From the thermal release 2, a connecting tongue 15 leads to a further connection terminal 16.
  • Fig. 1 the heat dissipation behavior 17, 18 is shown after a switching operation.
  • first large heat fields 19, 20 form on the free legs 21, 22 of the fixed contact piece 8, 9, which do not lead to the terminal 13 and the thermal release 2.
  • Further heat fields 23, 24, which are slightly less pronounced than the heat fields 19, 20, are located on the other two legs 25, 26 of the fixed contact pieces 8, 9. After these slightly less pronounced heat fields 23, 24, the heat in the direction of Terminals 13 and further removed via the thermal release 2 to the terminal 16.
  • Fig. 2 shows the representation Fig. 1 , 9 on the free legs 21, 22 of the fixed contact pieces 8, 9 Entracermungsvortechniken 27, 28 are arranged. These Entracermungsvortechniken 27, 28 may be formed for example as cooling plates or cooling fins. Out Fig. 2 goes on show that the heat fields 19, 20 are significantly reduced by the Entracermungsvortechnik 27, 28 according to the invention.
  • Fig. 3 a particularly advantageous embodiment of the invention Entracermungsvorraum 27, 28 is shown.
  • the cooling device 27, 28 is shown as a cooling plate 29.
  • the cooling plates 29 are preferably aligned parallel to one another and arranged on the fixed contact pieces 8, 9 and on the connecting tongue 15.
  • Fig. 4 is the presentation off Fig. 3 shown, wherein the cooling plates 29 extend beyond the switch base contour in the form of isolated, possibly housing integrated ribs 30.
  • Fig. 5 shows a further, space-optimized housing arrangement of the cooling plates 29 according to the invention.
  • the cooling surfaces preferably arranged in phase-separating housing intermediate walls 31.
  • the switching devices especially for circuit breakers, a second effective current path-Entskyrmungsweg is made possible, so that larger power losses are dissipated, so that higher rated current densities of the devices are possible with constant volume.
  • the heat dissipation surfaces are integrated in the form of cooling plates so space optimized in the switching device that the surfaces are neither installed nor covered. Due to the consideration of the contact point from the second Entracermungsweges in the cooling plates is advantageously a favorable decoupling of the thermal release of thermal fluctuations of the contact transition point, whereby the tripping behavior of the switching device is favorably influenced.
  • the space-optimized cooling device described here thus makes it possible to lower the overall temperature level as well as to improve the limiting current tripping behavior.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Apparatus For Making Beverages (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Breakers (AREA)

Abstract

The switchgear has a movable switching contact placed in a thermally operated tripper by a contact bridge support. The contact bridge support is mounted on a spring, and located opposite to fixed contacts (8, 9). Cooling devices (27, 28) made of heat-dissipating material are located sideward to the fixed contacts. The cooling devices are designed as heat sinks (29) that are formed as respective cooling fins. The cooling devices are located on a switching tongue (15) of the thermally operated tripper, and in a wall of a housing that acts as a separator between phases.

Description

Die Erfindung betrifft ein Schaltgerät, insbesondere einen Leistungsschalter mit einem thermischen Auslöser, an welchem über einen Kontaktbrückenträger ein bewegliches Schaltstück angeordnet ist, welches auf einem Federkörper gelagert ist und gegenüberliegend von festen Schaltstücken angeordnet ist.The invention relates to a switching device, in particular a circuit breaker with a thermal release, to which a movable contact piece is arranged via a contact bridge carrier, which is mounted on a spring body and is arranged opposite of fixed contact pieces.

Leistungsschalter werden in verschiedenen Baugrößen entwickelt. Eine Baugröße setzt sich dabei aus Gerätevarianten mit einer sinnvoll aufbauenden Nennstromreihe zusammen. Mit zunehmendem Nennstrom eines Gerätes steigt dessen Verlustleistungsumsatz überproportional stark an. Die Gerätevariante mit dem höchsten Nennstrom bei einer gegebenen Baugröße ist dadurch bestimmt, dass eben für diesen Strom der Verlustleistungsumsatz bei gegebenem Gehäusevolumen noch ohne nachteilige Folgen für die Anforderung des Schaltgerätes über seine Lebenszeit bleibt. Will man zu noch höheren Nennströmen kommen, entwickelt man eine größere Bauform. Aus Kundensicht ist es jedoch wünschenswert, den maximalen Nennstrom innerhalb einer Baugröße noch weiter nach oben zu treiben. Um dies zu erreichen, sind Maßnahmen zu ergreifen, die den Wärmetransport aus dem Gehäusevolumen technisch effizienter gestalten.Circuit-breakers are developed in various sizes. One size is composed of device variants with a meaningful series of rated current. As the rated current of a device increases, its power dissipation increases disproportionately. The device variant with the highest rated current for a given size is determined by the fact that just for this stream of power loss remains at a given housing volume without adverse consequences for the requirement of the switching device over its lifetime. If you want to get even higher rated currents, you develop a larger design. From the customer's point of view, however, it is desirable to increase the maximum rated current within one size even further. To achieve this, measures must be taken to make the heat transport from the housing volume technically more efficient.

Es gibt im Prinzip zwei Möglichkeiten mit hohen Temperaturen innerhalb eines Schutzgehäuses auf Grund unvermeidbarer elektrischer Verlustleistungen umzugehen. Zum Einen kann man alle Materialien so weit optimieren, dass sie ihre funktionalen Anforderungen auch auf hohem Temperaturniveau erfüllen. Dies ist jedoch oftmals keine wirtschaftliche Lösung. Das andere Vorgehen besteht darin, den Abtransport der erzeugten Wärmen aus dem Gehäuse durch technische Maßnahmen zu forcieren. Für elektronische Produkte sind aktive Kühlmaßnahmen mittels Gehäuselüfter, Heat Pipe-Anordnungen oder gar Kühlmittelkreisläufe Stand der Technik. Um lokal erzeugte große Wärmemengen damit auch abführen zu können, werden diese Wärmen mittels Kühlkörpern auf große Flächen verteilt. Dabei sind die Kühlkörper thermisch an die Bauteile mit hoher elektrischer Verlustleistung angebunden, aber elektrisch davon isoliert. Komplett passiv gekühlte Systeme sind dabei so konstruiert, dass die notwendigen Kühlkörper direkt von der Umgebungsluft angeströmt werden können.There are in principle two ways to handle high temperatures within a protective housing due to unavoidable electrical power losses. On the one hand, all materials can be optimized to meet their functional requirements, even at high temperatures. However, this is often not an economical solution. The other approach is to force the removal of the generated heat from the housing by technical measures. For electronic products, active cooling measures by means of housing fans, heat pipe arrangements or even coolant circuits are state of the art. In order to be able to dissipate locally generated large amounts of heat so that these are warming distributed by means of heat sinks on large areas. The heat sinks are thermally connected to the components with high electrical power loss, but electrically isolated from it. Fully passively cooled systems are designed in such a way that the necessary heat sinks can be directly flown by the ambient air.

Der Nachteil am Stand der Technik besteht darin, dass die bisherigen Entwärmungselemente nicht platzoptimiert im Schaltgerät angeordnet werden konnten.The disadvantage of the prior art is that the previous Entwärmungselemente could not be arranged optimally placed in the switching device.

Die Aufgabe der vorliegenden Erfindung besteht demgemäß darin, ein Schaltgerät zu schaffen, das einen platzoptimierten Entwärmungsprozess ermöglicht.The object of the present invention is therefore to provide a switching device that allows a space-optimized Entwärmungsprozess.

Diese Aufgabe wird durch ein Schaltgerät mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Aus- und Weiterbildungen, welche einzeln oder in Kombination miteinander eingesetzt werden können, sind der Gegenstand der abhängigen Ansprüche.This object is achieved by a switching device having the features of patent claim 1. Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

Erfindungsgemäß wird diese Aufgabe durch ein Schaltgerät, insbesondere einen Leistungsschalter mit einem thermischen Auslöser gelöst, an welchem über einen Kontaktbrückenträger ein bewegliches Schaltstück angeordnet ist, welches auf einem Federkörper gelagert ist und gegenüberliegend von festen Schaltstücken angeordnet ist. Die Erfindung zeichnet sich dabei dadurch aus, dass eine Entwärmungsvorrichtung aus einem Wärme ableitenden Material jeweils seitlich an den festen Schaltstücken angeordnet ist.According to the invention this object is achieved by a switching device, in particular a circuit breaker with a thermal release, on which a contact bridge carrier a movable contact piece is arranged, which is mounted on a spring body and is arranged opposite of fixed contact pieces. The invention is characterized in that a cooling device made of a heat dissipating material is arranged laterally on the fixed contact pieces.

Erfindungsgemäß erfolgt die Lösung des Entwärmungsproblems durch Eröffnung eines zweiten nennenswerten Entwärmungsweges entlang der Strombahn, wenn man von der Hauptwärmequelle, also der Kontaktbrücke ausgeht. Dieser neben der ins Gerät führenden ersten Entwärnungsrichtung zusätzliche zweite Weg, führt die Stromschiene entlang von den Kontaktstellen weg parallel zu den Löschblechen in Richtung der Stirnseiten. Bisher war dieses Ende der Strombahnausbildung wärmetechnisch gesehen eine Sackgasse und diente nur der Führung des Kurzschlusslichtbogens in Richtung Löscheinrichtung. Die Realisierung eines zweiten Wärmeweges kann mittels Einbringen von großflächigen Kühlelementen, wie zum Beispiel Kühlblechen, vorzugsweise in die Phasentrennwände von Schaltgeräten erreicht werden. Diese Kühlelemente sind direkt oder indirekt also zum Beispiel elektrisch isoliert und gut wärmeleitend mit den Stromschienen der Geräte verbunden. Sie erstrecken sich dann flächig in Hohlräume in den meist aus Kunststoff bestehenden Kammertrennwänden der Schaltgeräte.According to the solution of the Entwärmungsproblems by opening a second significant Entwärmungsweges along the current path, if one starts from the main heat source, so the contact bridge. This next to the leading direction of the first Entwärnungsrichtung additional second way leads the busbar along the contact points away parallel to the quenching plates in the direction of the end faces. So far was this end of the current train training thermally a dead end and served only the leadership of the short arc in the direction of extinguishing equipment. The realization of a second heat path can be achieved by introducing large-area cooling elements, such as cooling plates, preferably in the phase separation walls of switching devices. These cooling elements are therefore directly or indirectly so for example electrically isolated and good heat conducting connected to the busbars of the devices. They then extend flat in cavities in the usually made of plastic chamber partitions of the switching devices.

Besonders vorteilhaft ist die Fortführung dieser Kühlfahnen in den Teil der Kammertrennrippen hinein, der außerhalb des Gerätekorpus liegt. Diese außerhalb gelegenen Rippen dienen heute bisher in erster Linie der Vergrößerung der Isolationsstrecke, also der Luft- und Kriechstrecke zwischen den einzelnen Polen von Geräten. Wenn die Wärmedecke des thermisch schlecht leitenden Rippenkunststoffes klein bleibt, kann genügend Wärme hindurch an die Umgebung abgegeben werden. Wenn die Rippen zusätzlich über die gesamte Gerätehöhe verlaufen, ist die an die umgebende Luftwärme ableitende Fläche relativ groß. Im Übrigen bleiben diese Rippen bei Anordnung der Geräte dicht an dicht im Gegensatz zu den Geräteseitenflächen unverdeckt und damit überaus wirkungsvoll. Ein elektrischer Bediener-Berührschutz der metallischen Kühlfahnen ist durch die Kunststoffummantelung gegeben.Particularly advantageous is the continuation of these cooling flags in the part of the chamber separating ribs, which lies outside of the device body. Up to now, these outlying ribs primarily serve to increase the insulation distance, ie the clearance and creepage distance between the individual poles of devices. If the thermal blanket of the thermally poorly conducting ribbed plastic remains small enough heat can be dissipated to the environment. If the ribs additionally extend over the entire height of the device, the surface dissipating to the surrounding air heat is relatively large. Incidentally, these ribs remain in the arrangement of the devices close to tight in contrast to the device side surfaces uncovered and thus extremely effective. An electrical operator contact protection of the metallic cooling vanes is given by the plastic sheath.

Eine weitere den Wirkungsgrad steigernde Alternative besteht darin, die Kühlfahnen nicht berührungsgeschützt innerhalb der Kunststoffrippen zu verwenden, sondern direkt an Luft zu bringen. Der notwendige Bediener-Berührschutz müsste in diesem Fall über zwischen Strombahn und Kühlfahne elektrisch isolierende, aber thermisch gut leitende Zwischenschichten, wie zum Beispiel aus der Halbleiter-Leistungsmodultechnik bekannte Wärmeleitfolien oder keramische Plättchen sichergestellt werden.Another efficiency-increasing alternative is not to use the cooling vanes touch-protected within the plastic ribs, but to bring directly into the air. In this case, the necessary operator contact protection would have to be ensured by means of electrically insulating but thermally well-conducting intermediate layers, such as heat conducting foils or ceramic platelets known from semiconductor power module technology, between the current path and the cooling lug.

Ein Vorteil der erfindungsgemäßen Entwärmungsvorrichtung beseht darin, dass ein zweiter effektiver Strombahn-Entwärmungsweg gefunden wurde, damit größere Verlustleistungen abführbar sind, so dass höhere Nennstromdichten der Geräte bei gleichbleibendem Bauvolumen ermöglicht werden.An advantage of the cooling device according to the invention is that a second effective current path Entwärmungsweg was found so that larger power losses are dissipated, so that higher rated current densities of the devices are made possible with a constant volume.

Ein konstruktiver Vorteil besteht darin, dass die Wärmeabgabeflächen nicht verbaubar beziehungsweise nicht abgedeckt werden. Dadurch kann eine effiziente Wärmeabgabe erfolgen. Auf Grund des von der Kontaktstelle aus betrachteten zweiten Entwärmungsweges in die Kühlfläche hinein, erfolgt eine günstige Entkopplung des thermischen Auslösers, zum Beispiel eines Bimetalls von wärmetechnischen Schwankungen der Kontaktübergangsstelle. Dadurch wird das Auslöseverhalten des Gerätes günstig beeinflusst. Durch die erfindungsgemäße Entwärmungsvorrichtung wird somit sowohl eine Senkung des Temperaturniveaus, als auch eine Verbesserung des Grenzstromauslöseverhaltens erreicht.A constructive advantage is that the heat-emitting surfaces are not buildable or not covered. This can be done an efficient heat dissipation. On the basis of the second Entwärmungsweges considered by the contact point in the cooling surface, there is a favorable decoupling of the thermal release, for example a bimetal of thermal fluctuations in the contact transition point. As a result, the triggering behavior of the device is favorably influenced. The cooling device according to the invention thus achieves both a reduction in the temperature level and an improvement in the limiting current tripping behavior.

In einer besonders vorteilhaften Ausführungsform ist vorgesehen, dass die Entwärmungsvorrichtung aus einem wärmeleitenden Material insbesondere einem Kühlblech ausgebildet ist. Diese großen Kühlbleche ermöglichen es, dass die bisher innerhalb der Schaltgeräte mehr oder weniger punktuell in der Strombahn vorhandene Wärmemenge durch verhältnismäßig große Kühl- beziehungsweise Wärmeverteilflächen besser abgeleitet werden. Diese Kühlbleche sind in vorteilhafter Weise auch als Kühlrippen ausgebildet, die ebenfalls einen effizienten Wärmetransport ermöglichen.In a particularly advantageous embodiment, it is provided that the cooling device is formed of a heat-conducting material, in particular a cooling plate. These large cooling plates make it possible that the amount of heat previously present within the switching devices more or less selectively in the current path can be better dissipated by relatively large cooling or heat distribution surfaces. These cooling plates are advantageously designed as cooling fins, which also allow efficient heat transfer.

In einer vorteilhaften Variante der erfindungsgemäßen Entwärmungsvorrichtung ist vorgesehen, dass die Entwärmungsvorrichtung an den festen Schaltstücken sowie an einer Verbindungszunge des thermischen Auslösers angeordnet ist. Diese seitliche Platzierung der erfindungsgemäßen Entwärmungsvorrichtung an den festen Schaltstücken ermöglicht eine platzoptimierte Anordnung, die den effektiven Wärmetransport ermöglicht. Zudem ist in vorteilhafter Weise vorgesehen, dass die Entwärmungsvorrichtung in Kammertrennwänden des Schaltgeräts angeordnet ist. Die erfindungsgemäßen Kühlflächen sind auf diese Weise isoliert und platzoptimiert zwischen den Phasentrennwänden der Schaltgeräte positioniert. Zudem können die Kühlflächen, wenn sie zwischen den Phasen angeordnet sind, über den Gerätegrundkorpus hinaus, ein- oder beidseitig in außenliegende, gegebenenfalls isolierte Rippen hinein, ausgedehnt werden. Der Vorteil besteht darin, dass die Wärmeabfuhr über diese außenliegenden großflächigen Rippen wegen des direkten Kontakts zur umgebenden Luft äußerst effizient ist.In an advantageous variant of the cooling device according to the invention, it is provided that the cooling device is arranged on the fixed contact pieces as well as on a connecting tongue of the thermal release. This lateral placement of the cooling device according to the invention on the fixed contact pieces allows a space-optimized arrangement that allows the effective heat transfer. In addition, it is advantageously provided that the Entwärmungsvorrichtung is arranged in the chamber partitions of the switching device. The cooling surfaces according to the invention are isolated in this way and positioned optimally positioned between the phase barriers of the switching devices. In addition, the cooling surfaces, if they are arranged between the phases beyond the basic body of the device, can be extended on one or both sides into external, possibly insulated, ribs. The advantage is that the heat dissipation through these external large-area fins is extremely efficient because of the direct contact with the surrounding air.

Durch die hier vorgestellte erfindungsgemäße Entwärmungsvorrichtung der Schaltgeräte, insbesondere für Leistungsschalter, wird ein zweiter effektiver Strombahn-Entwärmungsweg ermöglicht, damit größere Verlustleistungen abführbar sind, so dass höhere Nennstromdichten der Geräte bei gleichbleibendem Bauvolumen möglich sind. Dabei werden die Wärmeabgabeflächen in Form von Kühlblechen so platzoptimiert in das Schaltgerät integriert, dass die Flächen weder verbaut noch abgedeckt werden. Auf Grund des von der Kontaktstelle aus betrachteten zweiten Entwärmungsweges in die Kühlbleche erfolgt in vorteilhafter Weise eine günstige Entkopplung des thermischen Auslösers von Wärme technischen Schwankungen der Kontaktübergangsstelle, wodurch auch das Auslöseverhalten des Schaltgeräts günstig beeinflusst wird. Durch die hier beschriebene platzoptimierte Entwärmungsvorrichtung ist somit sowohl eine Senkung des Temperaturniveaus insgesamt, als auch eine Verbesserung des Grenzstromauslöseverhaltens möglich.By the invention presented here Entwärmungsvorrichtung the switching devices, especially for circuit breakers, a second effective current path-Entwärmungsweg is made possible, so that larger power losses are dissipated, so that higher rated current densities of the devices are possible with constant volume. The heat dissipation surfaces are integrated in the form of cooling plates so space optimized in the switching device that the surfaces are neither installed nor covered. Due to the consideration of the contact point from the second Entwärmungsweges in the cooling plates is advantageously a favorable decoupling of the thermal release of heat technical fluctuations of the contact transition point, whereby the tripping behavior of the switching device is favorably influenced. The space-optimized cooling device described here thus makes it possible to lower the overall temperature level as well as to improve the limiting current tripping behavior.

Weitere Vorteile und Ausführungen der Erfindung werden nachfolgend anhand von Ausführungsbeispielen sowohl anhand der Zeichnung erläutert.
Dabei zeigen schematisch:

  • Fig. 1 in einer Schnittdarstellung ein Schaltgerät, insbesondere einen Leistungsschalter mit einem nach einem Schaltvorgang dargestellten Wärmeableitverhalten;
  • Fig. 2 in einer Schnittdarstellung ein erfindungsgemäßes Schaltgerät mit Entwärmungsvorrichtung nach einem Schaltvorgang mit Wärmeableitverhalten;
  • Fig. 3 in einer perspektivischen Darstellung ein Schaltgerät mit einer aus Kühlblechen ausgebildeten Entwärmungsvorrichtung;
  • Fig. 4 in einer perspektivischen Darstellung das Schaltgerät nach Fig. 3, wobei die Kühlbleche über die Schaltergrundkontur in Form isolierter Rippen ausgedehnt sind;
  • Fig. 5 in einer perspektivischen Darstellung eine weitere Ausführungsform der erfindungsgemäßen Entwärmungsvorrichtung mit Kühlflächen, die in phasentrennenden Gehäusezwischenwänden angeordnet sind.
Further advantages and embodiments of the invention will be explained below with reference to embodiments both with reference to the drawing.
Here are shown schematically:
  • Fig. 1 in a sectional view of a switching device, in particular a circuit breaker with a heat dissipation behavior shown after a switching operation;
  • Fig. 2 in a sectional view of an inventive switching device with Entwärmungsvorrichtung after a switching operation with Wärmeableitverhalten;
  • Fig. 3 in a perspective view, a switching device with a cooling device formed from cooling plates;
  • Fig. 4 in a perspective view of the switching device according to Fig. 3 wherein the cooling plates are extended over the switch base contour in the form of isolated ribs;
  • Fig. 5 in a perspective view of another embodiment of the cooling device according to the invention with cooling surfaces, which are arranged in phase-separating housing intermediate walls.

Fig. 1 zeigt ein Schaltgerät 1, insbesondere einen Leistungsschalter mit einem thermischen Auslöser 2, an welchem über einen Kontaktbrückenträger 3 ein bewegliches Schaltstück 4 angeordnet ist. Das bewegliche Schaltstück 4 ist als bewegliche Kontaktbrücke mit zwei Kontaktstellen 5, 6 ausgebildet. Das bewegliche Schaltstück 4 ist auf einem Federelement 7 im Kontaktbrückenträger 3 gelagert und gegenüber liegend zu den festen Schaltstücken 8, 9, angeordnet. Die festen Schaltstücke 8, 9 sind rechts beziehungsweise links vom Kontaktbrückenträger 3 angeordnet und weisen jeder eine Kontaktstelle 10, 11 auf, die bei einem Schaltvorgang auf die Kontaktstellen 5, 6 des beweglichen Schaltstücks 4 treffen. Fig. 1 shows a switching device 1, in particular a circuit breaker with a thermal release 2, to which a movable contact piece 4 is arranged via a contact bridge carrier 3. The movable contact piece 4 is designed as a movable contact bridge with two contact points 5, 6. The movable contact piece 4 is mounted on a spring element 7 in the contact bridge carrier 3 and opposite to the fixed contact pieces 8, 9, respectively. The fixed contact pieces 8, 9 are arranged on the right or left of the contact bridge carrier 3 and each have a contact point 10, 11, which meet in a switching operation on the contact points 5, 6 of the movable contact piece 4.

Das feste Schaltstück 8 ist vorzugsweise U-förmig ausgebildet und weist einen Fortsatz 12 auf, der zu einer Anschlussklemme 13 führt. Das feste Schaltstück 9 ist ebenfalls U-förmig ausgebildet mit einem langen und einem kurzen Schenkel, wobei der kürzere Schenkel über einen Fortsatz 14 zum thermischen Auslöser 2 führt. Vom thermischen Auslöser 2 führt eine Verbindungszunge 15 zu einer weiteren Anschlussklemme 16.The fixed contact 8 is preferably U-shaped and has an extension 12, which leads to a terminal 13. The fixed contact 9 is also U-shaped with a long and a short leg, the shorter leg leads via an extension 14 to the thermal release 2. From the thermal release 2, a connecting tongue 15 leads to a further connection terminal 16.

In Fig. 1 ist zudem das Wärmeableitverhalten 17, 18 nach einem Schaltvorgang dargestellt. Nach einem Schaltvorgang bilden sich zunächst große Wärmefelder 19, 20 an den freien Schenkeln 21, 22 des festen Schaltstücks 8, 9 aus, die nicht zur Anschlussklemme 13 sowie zum thermischen Auslöser 2 führen. Weitere Wärmefelder 23, 24, die etwas weniger ausgeprägt sind als die Wärmefelder 19, 20, befinden sich an den anderen zwei Schenkeln 25, 26 der festen Schaltstücke 8, 9. Nach diesen etwas geringer ausgeprägten Wärmefeldern 23, 24 wird die Wärme in Richtung der Anschlussklemmen 13 sowie über den thermischen Auslöser 2 zur Anschlussklemme 16 weiter abgeführt.In Fig. 1 In addition, the heat dissipation behavior 17, 18 is shown after a switching operation. After a switching operation, first large heat fields 19, 20 form on the free legs 21, 22 of the fixed contact piece 8, 9, which do not lead to the terminal 13 and the thermal release 2. Further heat fields 23, 24, which are slightly less pronounced than the heat fields 19, 20, are located on the other two legs 25, 26 of the fixed contact pieces 8, 9. After these slightly less pronounced heat fields 23, 24, the heat in the direction of Terminals 13 and further removed via the thermal release 2 to the terminal 16.

Fig. 2 zeigt die Darstellung nach Fig. 1, wobei an den freien Schenkeln 21, 22 der festen Schaltstücke 8, 9 Entwärmungsvorrichtungen 27, 28 angeordnet sind. Diese Entwärmungsvorrichtungen 27, 28 können beispielsweise als Kühlbleche oder Kühlrippen ausgebildet sein. Aus Fig. 2 geht weiterhin hervor, dass die Wärmefelder 19, 20 durch die erfindungsgemäße Entwärmungsvorrichtung 27, 28 deutlich geringer ausgebildet sind. Fig. 2 shows the representation Fig. 1 , 9 on the free legs 21, 22 of the fixed contact pieces 8, 9 Entwärmungsvorrichtungen 27, 28 are arranged. These Entwärmungsvorrichtungen 27, 28 may be formed for example as cooling plates or cooling fins. Out Fig. 2 goes on show that the heat fields 19, 20 are significantly reduced by the Entwärmungsvorrichtung 27, 28 according to the invention.

In Fig. 3 ist eine besonders vorteilhafte Ausführungsform der erfindungsgemäßen Entwärmungsvorrichtung 27, 28 dargestellt. In diesem Beispiel ist die Entwärmungsvorrichtung 27, 28 als Kühlblech 29 dargestellt. Die Kühlbleche 29 sind vorzugsweise parallel zueinander ausgerichtet und an den festen Schaltstücken 8, 9 sowie an der Verbindungszunge 15 angeordnet.In Fig. 3 a particularly advantageous embodiment of the invention Entwärmungsvorrichtung 27, 28 is shown. In this example, the cooling device 27, 28 is shown as a cooling plate 29. The cooling plates 29 are preferably aligned parallel to one another and arranged on the fixed contact pieces 8, 9 and on the connecting tongue 15.

In Fig. 4 ist die Darstellung aus Fig. 3 gezeigt, wobei die Kühlbleche 29 sich über die Schaltergrundkontur hinaus in Form isolierter, ggf. gehäuseintegrierter Rippen 30 ausdehnen.In Fig. 4 is the presentation off Fig. 3 shown, wherein the cooling plates 29 extend beyond the switch base contour in the form of isolated, possibly housing integrated ribs 30.

Fig. 5 zeigt eine weitere, platzoptimierte Gehäuseanordnung der erfindungsgemäßen Kühlbleche 29. Hier sind die Kühlflächen vorzugsweise in phasentrennenden Gehäusezwischenwänden 31 angeordnet. Fig. 5 shows a further, space-optimized housing arrangement of the cooling plates 29 according to the invention. Here are the cooling surfaces preferably arranged in phase-separating housing intermediate walls 31.

Durch die hier vorgestellte erfindungsgemäße Entwärmungsvorrichtung der Schaltgeräte, insbesondere für Leistungsschalter, wird ein zweiter effektiver Strombahn-Entwärmungsweg ermöglicht, damit größere Verlustleistungen abführbar sind, so dass höhere Nennstromdichten der Geräte bei gleichbleibendem Bauvolumen möglich sind. Dabei werden die Wärmeabgabeflächen in Form von Kühlblechen so platzoptimiert in das Schaltgerät integriert, dass die Flächen weder verbaut noch abgedeckt werden. Auf Grund des von der Kontaktstelle aus betrachteten zweiten Entwärmungsweges in die Kühlbleche erfolgt in vorteilhafter Weise eine günstige Entkopplung des thermischen Auslösers von wärmetechnischen Schwankungen der Kontaktübergangsstelle, wodurch auch das Auslöseverhalten des Schaltgeräts günstig beeinflusst wird. Durch die hier beschriebene platzoptimierte Entwärmungsvorrichtung ist somit sowohl eine Senkung des Temperaturniveaus insgesamt, als auch eine Verbesserung des Grenzstromauslöseverhaltens möglich.By the invention presented here Entwärmungsvorrichtung the switching devices, especially for circuit breakers, a second effective current path-Entwärmungsweg is made possible, so that larger power losses are dissipated, so that higher rated current densities of the devices are possible with constant volume. The heat dissipation surfaces are integrated in the form of cooling plates so space optimized in the switching device that the surfaces are neither installed nor covered. Due to the consideration of the contact point from the second Entwärmungsweges in the cooling plates is advantageously a favorable decoupling of the thermal release of thermal fluctuations of the contact transition point, whereby the tripping behavior of the switching device is favorably influenced. The space-optimized cooling device described here thus makes it possible to lower the overall temperature level as well as to improve the limiting current tripping behavior.

Claims (6)

Schaltgerät, insbesondere Leistungsschalter mit einem thermischen Auslöser (2), an welchem über einen Kontaktbrückenträger (3) ein bewegliches Schaltstück (4) angeordnet ist, welches auf einem Federkörper (7) gelagert ist und gegenüberliegend von festen Schaltstücken (8, 9) angeordnet ist,
dadurch gekennzeichnet, dass
eine Entwärmungsvorrichtung (27, 28, 29) aus einem wärmeableitenden Material jeweils seitlich an den festen Schaltstücken (8, 9) angeordnet ist.Switching device, in particular circuit breaker with a thermal release (2) on which via a contact bridge carrier (3) a movable contact piece (4) is arranged, which is mounted on a spring body (7) and opposite of fixed contact pieces (8, 9) is arranged .
characterized in that
a Entwärmungsvorrichtung (27, 28, 29) made of a heat-dissipating material in each case laterally on the fixed contact pieces (8, 9) is arranged. Schaltgerät nach Anspruch 1,
dadurch gekennzeichnet, dass
die Entwärmungsvorrichtung (27, 28, 29) aus einem wärmeableitenden Material als Kühlblech (29) ausgebildet ist.Switching device according to claim 1,
characterized in that
the Entwärmungsvorrichtung (27, 28, 29) is formed of a heat-dissipating material as a cooling plate (29). Schaltgerät nach Anspruch 2,
dadurch gekennzeichnet, dass
die Kühlbleche (29) als Kühlrippen ausgebildet sind.Switching device according to claim 2,
characterized in that
the cooling plates (29) are designed as cooling fins. Schaltgerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Entwärmungsvorrichtung (27, 28, 29) an den festen Schaltstücken (8, 9) sowie an der Verbindungszunge (15) des thermischen Auslösers (2) angeordnet ist.Switching device according to one of the preceding claims,
characterized in that
the Entwärmungsvorrichtung (27, 28, 29) on the fixed contact pieces (8, 9) and on the connecting tongue (15) of the thermal release (2) is arranged. Schaltgerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Entwärmungsvorrichtung (27, 28, 29) in phasentrennenden Gehäusezwischenwänden (31) angeordnet ist.Switching device according to one of the preceding claims,
characterized in that
the cooling device (27, 28, 29) is arranged in phase-separating housing partitions (31). Schaltgerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Kühlbleche (29) über die Schaltergrundkontur in Form von isolierten Rippen angeordnet sind.Switching device according to one of the preceding claims,
characterized in that
the cooling plates (29) are arranged over the switch base contour in the form of insulated ribs.
EP10008006.8A 2010-07-30 2010-07-30 Switching device with cooling device Active EP2413338B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP10008006.8A EP2413338B1 (en) 2010-07-30 2010-07-30 Switching device with cooling device
PCT/EP2011/061049 WO2012013440A1 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus
US13/811,050 US9799462B2 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus
CN201180034646.6A CN103003905B (en) 2010-07-30 2011-06-30 There is the switchgear of heat abstractor
BR112013002339-2A BR112013002339B1 (en) 2010-07-30 2011-06-30 power switch with a thermal trigger
KR1020137005094A KR101578341B1 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus
EP11730945A EP2564407A1 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10008006.8A EP2413338B1 (en) 2010-07-30 2010-07-30 Switching device with cooling device

Publications (2)

Publication Number Publication Date
EP2413338A1 true EP2413338A1 (en) 2012-02-01
EP2413338B1 EP2413338B1 (en) 2017-08-30

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EP10008006.8A Active EP2413338B1 (en) 2010-07-30 2010-07-30 Switching device with cooling device
EP11730945A Withdrawn EP2564407A1 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11730945A Withdrawn EP2564407A1 (en) 2010-07-30 2011-06-30 Switching device with a heat extraction apparatus

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US (1) US9799462B2 (en)
EP (2) EP2413338B1 (en)
KR (1) KR101578341B1 (en)
CN (1) CN103003905B (en)
BR (1) BR112013002339B1 (en)
WO (1) WO2012013440A1 (en)

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Also Published As

Publication number Publication date
WO2012013440A1 (en) 2012-02-02
US20130118869A1 (en) 2013-05-16
KR20130041282A (en) 2013-04-24
BR112013002339A8 (en) 2016-10-18
BR112013002339B1 (en) 2020-10-27
EP2413338B1 (en) 2017-08-30
BR112013002339A2 (en) 2016-05-24
KR101578341B1 (en) 2015-12-17
CN103003905B (en) 2016-08-03
US9799462B2 (en) 2017-10-24
EP2564407A1 (en) 2013-03-06
CN103003905A (en) 2013-03-27

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