EP1037220A2 - Transformer and method of cooling a transformer - Google Patents

Transformer and method of cooling a transformer Download PDF

Info

Publication number
EP1037220A2
EP1037220A2 EP00250096A EP00250096A EP1037220A2 EP 1037220 A2 EP1037220 A2 EP 1037220A2 EP 00250096 A EP00250096 A EP 00250096A EP 00250096 A EP00250096 A EP 00250096A EP 1037220 A2 EP1037220 A2 EP 1037220A2
Authority
EP
European Patent Office
Prior art keywords
winding
cooling
transformer
cooling element
combination
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
EP00250096A
Other languages
German (de)
French (fr)
Other versions
EP1037220A3 (en
EP1037220B1 (en
Inventor
Fritz Sorg
Friedrich Alber
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
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 filed Critical Siemens AG
Publication of EP1037220A2 publication Critical patent/EP1037220A2/en
Publication of EP1037220A3 publication Critical patent/EP1037220A3/en
Application granted granted Critical
Publication of EP1037220B1 publication Critical patent/EP1037220B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air

Definitions

  • the invention relates to a transformer with a first, a second and a third winding combination, the each standing and next to each other in ascending count are arranged in a row and each have a cooling element exhibit.
  • Such a transformer is known from GEAFOL cast resin transformers, 100 to 2500 kVA "from the Trafo-Union, Nuremberg 1995.
  • the transformer is designed as a cast resin three-phase transformer and has three standing winding combinations arranged side by side in a row. Each of the winding combinations is enclosed one of the legs of a three-leg transformer core and is assigned to a phase of a three-phase network.
  • the winding combinations are all the same and each have a high-voltage winding cast in cast resin on the undervoltage winding cast in resin coaxially surrounding leaving a space.
  • Each the windings are made up of a plurality of turns electrical conductor formed.
  • the three winding combinations In normal operation of the well-known three-phase transformer the three winding combinations each with one largely the same normal electrical power. This leads to a warming of the high voltage and Undervoltage windings and their insulation.
  • a The parameter is the limit temperature of the insulation. A inadmissible heating of the insulation, i.e. exceeding the limit temperature, can lead to premature aging of the Isolation with a resulting reduction their insulation strength.
  • the Windings at high temperatures have a high ohmic Resistance to.
  • the winding combinations are cooled by air cooling. In order to achieve the highest possible cooling performance, in the space between the winding combination coaxially as cylindrical tube trained cooling cylinder arranged, and with every winding combination.
  • Every cooling cylinder is non-contact to high voltage winding and non-contact arranged for undervoltage winding. This makes everyone Space through the cooling cylinder arranged in it one between the high voltage winding and the cooling cylinder located outer ring channel and in one between the Cooling cylinder and the undervoltage winding inner ring channel divided. The one in the windings everyone Winding combination generated heat is directly to the air flowing through the inner and outer ring channels and additionally by radiation on the in the winding combination arranged cooling cylinder delivered. The Cooling cylinder transfers the heat absorbed to it air flowing along. The air forms a vertical Air flow from bottom to top through the outer and the inner ring channel. This air cooling is overheating of insulation avoided and ohmic resistance the conductor from which the windings are formed is small, so that these conductors have only a small cross section have to.
  • From DE-GM 1 980 288 is a winding combination with two coaxially intertwined windings known.
  • the two windings are spaced radially from one another, so that there is a space between them.
  • cooling pipes By doing Intermediate space are arranged cooling pipes, the axes of which are parallel are aligned with the common axis of the windings.
  • the both windings are in one with the cooling tubes cast in common cast resin body. But there are the pipes themselves are not poured out and stick out from the end of the cast resin block. So you are for Cooling of the windings can be flowed through with cooling air.
  • a solid-insulated distribution transformer in which windings are cast in cast resin.
  • heat pipes are cast into the cast resin, which serve to cool the transformer
  • the heat pipes are each self-contained and have an evaporator part and a condenser part.
  • the heat pipes are arranged such that the evaporator part is arranged within the region of the cast resin body from which heat is to be removed.
  • the condenser part of each heat pipe is located in an area of the cast resin body in which heat can be given off.
  • a liquid is provided within such a heat pipe. This liquid evaporates during operation by the heat supplied to the evaporator part from the windings. Evaporation cools the area in which the evaporator part is located .
  • D the steam settles in the condenser part and condenses, releasing heat to the area in the cast resin body outside the condenser part.
  • the object of the invention is to provide a transformer Specify the type specified at the beginning, in which a adequate cooling of all winding combinations with can achieve comparatively less effort.
  • the object directed to the transformer is invented by a transformer according to the preamble of the claim 1 solved, in the case of the first and / or the third winding combination each the cooling element is omitted.
  • the invention is based on the knowledge that in one free-standing transformer according to the state of the art two outer winding combinations, i.e. the first and the third winding combination, not as strong in operation Require cooling as previously thought. Carried out Studies have shown that in normal operation the two outer winding combinations less warm up much more than the middle winding combination. In can advantageously be thermally lower in both loaded outer winding combinations of the transformer in each case that which is provided as standard in the prior art Cooling element omitted and thus saved. Reached will also show that the temperature difference between the outer winding combinations and the middle, so second winding combination is reduced.
  • the transformer according to the invention for an installation provided in which the heat dissipation from one of its outer Winding combinations, for example the first Winding combination is difficult (for example, by its Arrangement in the corner of a building), then the first Winding combination as in the prior art Have cooling element. In this case it is the cooling element only with one of the winding combinations - here the third winding combination - omitted.
  • Each winding combination preferably has one Cooling element on a first winding by a second
  • the winding is surrounded, leaving a gap, wherein the cooling element is arranged in the space.
  • the Gap can also serve as a cooling air duct in the air flows to cool the second winding combination.
  • the cooling element can be designed in this way, for example be that there is a particularly large cooling surface.
  • Under Cooling surface is understood to mean the surface that gives off heat to the air flowing in the space.
  • the cooling element can also be designed as a blower through which is a large air mass flow through the space is driven.
  • the cooling element is as Cooling cylinder trained.
  • Each is under cooling cylinder kind of pipe understood.
  • This pipe can be used without contact first winding and contactless to the second winding in the Intermediate space and the undervoltage winding surrounded coaxially.
  • This makes the gap into one inner, between the cooling cylinder and the first winding arranged cooling channel and an outer, between the cooling cylinder and the second winding arranged cooling channel.
  • the first and the second winding Heat also in the form of radiation from the cooling cylinder.
  • the air flowing in the cooling channels takes that in the cooling cylinder temporarily stored heat on its lateral surfaces and leads them away. This compares the effective cooling surface to a winding combination without cooling cylinder larger, and the achievable cooling capacity is higher.
  • the cooling cylinder can be designed so that it over the axial extension of the winding combination extends beyond.
  • the cooling element is trained to be its respective Touches the winding combination.
  • the cooling element can then each Be arrangement that touches the first winding and / or the second winding absorbs heat and to the emits cooling air flowing through.
  • the cooling element can thus, for example, as a be cylindrical tube formed the space completely filled out by a variety of Cooling channels is crossed through which air can be guided.
  • the Heat absorbed by the heat sink is transferred to the cooling channels flowing air released.
  • the in or in the windings The heat generated can be absorbed quickly with the heat sink and quickly dissipated so that the winding or the Windings are cooled with high cooling capacity.
  • the cooling element preferably consists at least partially Plastic.
  • Plastics are generally high electrical insulation resistance.
  • partially or completely made of plastic ensured that the dielectric strengths of the windings (against each other and internally) of the second Winding combination despite the arrangement of the cooling element is guaranteed.
  • the cooling element can also be at least partially made of metal consist. Metals have a high thermal conductivity, so that heat quickly with the metal cooling element can be dissipated. In the formation of the cooling element made of metal, however, must ensure that the necessary Dielectric strengths of the windings are observed.
  • the cooling element is preferably designed so that it second winding combination at least almost to the temperature cools on which the first winding combination is in operation located.
  • the cooling element can also be used, for example Ribs are made to cover a large cooling element surface to build.
  • Cast resin transformers are all Understand types of transformers, at least a winding of resin is enclosed. The one with cast resin enclosed winding is securely packed and therefore against Dust deposits protected. Furthermore, it is largely maintenance-free and insensitive to touch.
  • the invention also relates to a method for cooling a Transformers in normal operation, each standing and in ascending count next to each other in a row a first, a second and a third winding combination having.
  • Such a cooling process is also from the above known product specification known.
  • the winding combinations of the transformer described there are by air cooling chilled. This is done by cooling air through the ring channels every winding combination.
  • the invention is based on the further object, the above specified method for cooling a transformer to improve in that its winding combinations are easily cooled so that they can be Normal operation assume a largely identical temperature.
  • the on the process of cooling a transformer, the each standing and next to each other in ascending count arranged in a row a first, a second and a has third winding combination, directed task solved according to the invention in that the thermally highest loaded winding combination with a higher cooling capacity is cooled as a thermally less loaded Winding combination.
  • the thermal load is higher for example the second winding combination by a Cooling with a correspondingly higher cooling capacity counteracted.
  • Can influence the cooling capacity for example the mass of the space between the concerned winding combination or by the Cooling air channels of a heat sink flowing air through Arrangement of a fan set at the appropriate point become.
  • the winding combinations are preferred to almost that cooled at the same temperature. This allows the Winding combinations with regard to their heat resistance be of the same design, the effort involved in this Limits. Also taking into account the effort for air cooling results in a cost-saving solution.
  • the three-phase transformer 4 includes side by side and in a row arranged a first winding combination 1, a second Winding combination 2 and a third winding combination 3, each along a vertical axis 31A, 31B and 31C are directed.
  • Each of the winding combinations 1, 2 and 3 surrounds a leg 5, 6 and 7 of a transformer core 8, which is designed as an EI core or as a 5-leg core.
  • the transformer core 8 is used for guidance in a known manner of magnetic generated during operation of the three-phase transformer 4 Rivers.
  • Each of the winding combinations 1, 2 and 3 has a first one Winding 12, 13 or 14 and a second winding 9, 10 or 11 on.
  • the first windings 12, 13 and 14 are here as undervoltage windings 12, 13 and 14 and the second windings 9, 10 and 11 are here as high-voltage windings 9, 10, 11 executed.
  • Each high voltage winding 9, 10 and 11 surrounds the associated undervoltage winding 12, 13 or 14 coaxially leaving a space 15, 16 and 17, respectively.
  • the high-voltage windings 9, 10 and 11 and the undervoltage windings 12, 13 and 14 each include one not shown Electric Isolation. Have these isolations a limit temperature up to which they can be heated without they age improperly.
  • the second winding combination 2 is in operation due to their structural arrangement between the first winding combination 1 and the third winding combination 3 warms more than the two outer winding combinations 1 and 3. This higher warming is before all due to the fact that the middle winding combination 2 also from the two winding combinations 1 and 3 emitted heat is heated. Therefore included in the difference only the second winding combination to the state of the art 2 a cooling element 18, which is designed as a cooling cylinder is.
  • the winding combinations 1 and 3 are free of built-in passive cooling elements.
  • the cooling element 18 is designed as a tube and in the space 16 arranged. It surrounds the undervoltage winding 13 non-contact and is non-contact from the high-voltage winding 10 surrounded. It divides the space 16 into one between the high-voltage winding 16 and the cooling element 18 located outer cooling channel 19 and one between the Cooling element 18 and the undervoltage winding 13 located inner cooling duct 20. The arrangement of the cooling element 18 in the space 16, the high-voltage winding 10 and the low-voltage winding 13 is cooled together during operation. It should be emphasized once again that the default in the three-phase transformer according to the prior art the first and third winding combinations 1 and 3 provided Cooling elements are omitted and saved. In order to there is a reduction in effort. This will make the compared to the second winding combination 2 thermally less loaded winding combinations 1 and 2 each cooled with a lower cooling capacity than the second Winding combination.
  • the medium winding combination 2 are cooled so that they in Operation with normal power assumes almost the same temperature like the first and like the third winding combination 1 or 3.
  • the normal power can be selected so high that the aforementioned same temperature equal to the limit temperature is.
  • the heat resistance of all insulation of the winding combinations 1 to 3 can then operate up to the limit temperature be exploited.
  • the cylindrical cooling element 18 can consist of one Be made of plastic. Plastics generally have a high insulation strength, so that in one execution of the cooling element 18 made of plastic, the insulation strength the second winding combination 2 fully guaranteed is.
  • a metal can also be contained in the cooling element 18. Metals have a high thermal conductivity, so that from Cooling element 18 heat well conducted and dissipated is and the winding combination 2 is cooled well. In the Formation of the cooling element 18 with a metal must be ensured that the electrical properties of the second winding combination 2 the requirements of the common test regulations correspond.
  • FIG 2 is a section through the second winding combination 2 with an alternative cooling element 34 which is designed as a touching heat sink.
  • the cooling element 34 is also arranged in the space 16; but it fills this with flat contact of the high-voltage winding 10 and the undervoltage winding 13. It can be in Direction of axis 31B beyond windings 10 and 13 extend, or it can only part in this direction fill in the space 16. Through the flat touch with the windings 10 and 13, heat comes from these with high Heat transfer coefficient into the cooling element 34. Later explained Cooling channels in the cooling element 34 are - as indicated by arrows - Can be flowed through by cooling air 22 (see also FIG 3).
  • FIG 3 is a cross section through the second winding combination 2 with an alternative cooling element 34 shown according to a first modification.
  • the cooling element 34 is designed as a tube directed along axis 31B, the jacket of which has a plurality of axially directed Has cooling channels 35 for the flow of air 22.
  • FIG 4 is a cross section through the second winding combination 2 with a second modification of the alternative Cooling element 34 shown.
  • Cooling element 34 from a plurality of axially directed circular tube jacket segments 36 formed.
  • the circular tube jacket segments 36 are spaced apart from one another in the space 16 in the circumferential direction 38 arranged, whereby between two adjacent Circular tube jacket segments 36 a further cooling air duct 39 for the flow of cooling air 22 is formed.
  • the circular tube jacket segments 36 point in the direction of the axis 31B Cooling air channels 37 for the flow of cooling air 22 on.
  • FIG 5 is a plan view of a cross section through one arranged in the corner 40 of a building wall 41 Transformer 4A shown.
  • the Transformer 4a in the corner 40 is the heat dissipation from the first winding combination 1 compared to heat dissipation difficult from the third winding combination 3 because the Winding combination 1 from the building wall 41 and from the second winding combination 2 is surrounded and only one Page 42 is freely accessible.
  • This will also work the first winding combination 1 is subjected to a higher thermal load than the third winding combination 3. Therefore, the first Winding combination 1 in the space 15 also Cooling element 43 arranged.
  • the cooling element 43 can on the thermal load of the winding combination 1 matched be designed so that the winding combination 1 in Operation at almost the same temperature as that Winding combination 3 is cooled.
  • the cooling element 43 can but also - for the sake of simplicity - structurally identical to the Cooling element 18 may be formed. In the present case it is Cooling element 43 designed as a cooling cylinder and divides the Gap 15 in an outer annular channel 44 and in one inner ring channel 45.
  • the cooling element 1 is also like the winding combination 2 is cooled by air cooling. At the Transformer 4A is only the lowest thermally loaded winding combination 3 no cooling element provided so that this winding combination 3 with a lower cooling capacity is cooled than, for example second winding combination 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Transformer Cooling (AREA)

Abstract

A cast resin transformer (4) includes three sets of windings (1- 3) arranged in series and adjacent to one another. Of the three winding sets only the second winding set (2) has a cooling element (18,34). The second set of windings (2) includes a first winding (13) enclosed by a second winding (10) with provision for an inter- space (16) for accommodating the cooling element (18,34), which is specifically designed as a cooling cylinder (18), which contains a plastics material, or is completely made of plastics material or more specifically contains a metal.

Description

Die Erfindung betrifft einen Transformator mit einer ersten, einer zweiten und einer dritten Wicklungskombination, die jeweils stehend und in aufsteigender Zählung nebeneinander in einer Reihe angeordnet sind und jeweils ein Kühlelement aufweisen.The invention relates to a transformer with a first, a second and a third winding combination, the each standing and next to each other in ascending count are arranged in a row and each have a cooling element exhibit.

Aus der Produktschrift

Figure 00010001
GEAFOL-Gießharztransformatoren, 100 bis 2500 kVA" der Trafo-Union, Nürnberg 1995, ist ein solcher Transformator bekannt. Der Transformator ist als Gießharz-Drehstrom-Transformator ausgebildet und weist drei stehende, nebeneinander in einer Reihe angeordnete Wicklungskombinationen auf. Jede der Wicklungskombinationen umschließt einen der Schenkel eines dreischenkligen Transformatorkerns und ist einer Phase eines dreiphasigen Netzes zugeordnet.From the product font
Figure 00010001
Such a transformer is known from GEAFOL cast resin transformers, 100 to 2500 kVA "from the Trafo-Union, Nuremberg 1995. The transformer is designed as a cast resin three-phase transformer and has three standing winding combinations arranged side by side in a row. Each of the winding combinations is enclosed one of the legs of a three-leg transformer core and is assigned to a phase of a three-phase network.

Die Wicklungskombinationen sind alle gleich ausgeführt und weisen jeweils eine in Gießharz gegossene Oberspannungswicklung auf, die eine in Gießharz gegossene Unterspannungswicklung unter Belassung eines Zwischenraums koaxial umgibt. Jede der Wicklungen ist aus einer Mehrzahl von Windungen eines elektrischen Leiters gebildet.The winding combinations are all the same and each have a high-voltage winding cast in cast resin on the undervoltage winding cast in resin coaxially surrounding leaving a space. Each the windings are made up of a plurality of turns electrical conductor formed.

Im Normalbetrieb des bekannten Drehstrom-Transformators werden die drei Wicklungskombinationen jeweils mit einer weitgehend gleichen elektrischen Normalleistung beaufschlagt. Dabei kommt es zu einer Erwärmung der Oberspannungs- und der Unterspannungswicklungen sowie deren Isolationen. Eine Kenngröße ist dabei die Grenztemperatur der Isolation. Eine unzulässige Erwärmung der Isolation, also ein Überschreiten der Grenztemperatur, kann zu einer vorzeitigen Alterung der Isolation mit einer dadurch hervorgerufenen Verringerung ihrer Isolationsfestigkeit führen. Zudem weisen die Wicklungen bei hohen Temperaturen einen hohen ohm'schen Widerstand auf. Um eine unzulässig starke Erwärmung der Isolationen zu vermeiden, und um Leitermaterial einzusparen, werden die Wicklungskombinationen durch Luftkühlung gekühlt. Um dabei eine möglichst hohe Kühlleistung zu erreichen, ist in dem Zwischenraum der Wicklungskombination koaxial ein als zylindrisches Rohr ausgebildeter Kühlzylinder angeordnet, und zwar bei jeder Wicklungskombination. Jeder Kühlzylinder ist berührungsfrei zur Oberspannungswicklung und berührungsfrei zur Unterspannungswicklung angeordnet. Dadurch ist jeder Zwischenraum durch den im ihm angeordneten Kühlzylinder in einen zwischen der Oberspannungswicklung und dem Kühlzylinder befindlichen äußeren Ringkanal und in einen zwischen dem Kühlzylinder und der Unterspannungswicklung befindlichen inneren Ringkanal geteilt. Die in den Wicklungen jeder Wicklungskombination entstehende Wärme wird direkt an die durch den inneren und den äußeren Ringkanal strömende Luft und zusätzlich durch Strahlung an den in der Wicklungskombination angeordneten Kühlzylinder abgegeben. Der Kühlzylinder gibt die aufgenommene Wärme an die an ihm entlang strömende Luft ab. Die Luft bildet eine vertikale Luftströmung von unten nach oben durch den äußeren und den inneren Ringkanal. Durch diese Luftkühlung ist eine Überhitzung der Isolationen vermieden und der ohm'sche Widerstand der Leiter, aus denen die Wicklungen gebildet sind, ist gering, so daß diese Leiter nur einen geringen Querschnitt aufweisen müssen.In normal operation of the well-known three-phase transformer the three winding combinations each with one largely the same normal electrical power. This leads to a warming of the high voltage and Undervoltage windings and their insulation. A The parameter is the limit temperature of the insulation. A inadmissible heating of the insulation, i.e. exceeding the limit temperature, can lead to premature aging of the Isolation with a resulting reduction their insulation strength. In addition, the Windings at high temperatures have a high ohmic Resistance to. To prevent excessive heating of the To avoid insulation and to save conductor material, the winding combinations are cooled by air cooling. In order to achieve the highest possible cooling performance, in the space between the winding combination coaxially as cylindrical tube trained cooling cylinder arranged, and with every winding combination. Every cooling cylinder is non-contact to high voltage winding and non-contact arranged for undervoltage winding. This makes everyone Space through the cooling cylinder arranged in it one between the high voltage winding and the cooling cylinder located outer ring channel and in one between the Cooling cylinder and the undervoltage winding inner ring channel divided. The one in the windings everyone Winding combination generated heat is directly to the air flowing through the inner and outer ring channels and additionally by radiation on the in the winding combination arranged cooling cylinder delivered. The Cooling cylinder transfers the heat absorbed to it air flowing along. The air forms a vertical Air flow from bottom to top through the outer and the inner ring channel. This air cooling is overheating of insulation avoided and ohmic resistance the conductor from which the windings are formed is small, so that these conductors have only a small cross section have to.

Aus dem DE-GM 1 980 288 ist eine Wicklungskombination mit zwei koaxial ineinander stehenden Wicklungen bekannt. Die beiden Wicklungen sind radial voneinander beabstandet, so dass zwischen ihnen ein Zwischenraum gebildet ist. In dem Zwischenraum sind Kühlrohre angeordnet, deren Achsen parallel zur gemeinsamen Achse der Wicklungen ausgerichtet sind. Die beiden Wicklungen sind gemeinsam mit den Kühlrohren in einen gemeinsamen Gießharzkörper eingegossen. Dabei sind allerdings die Rohre selbst in ihrem Inneren nicht ausgegossen und ragen stirnseitig aus dem Gießharzblock heraus. Sie sind also zur Kühlung der Wicklungen mit Kühlluft durchströmbar.From DE-GM 1 980 288 is a winding combination with two coaxially intertwined windings known. The two windings are spaced radially from one another, so that there is a space between them. By doing Intermediate space are arranged cooling pipes, the axes of which are parallel are aligned with the common axis of the windings. The both windings are in one with the cooling tubes cast in common cast resin body. But there are the pipes themselves are not poured out and stick out from the end of the cast resin block. So you are for Cooling of the windings can be flowed through with cooling air.

Aus dem Artikel Weltweit erster Verteiltransformator mit Feststoff-Isolierung", ABB Technik Nr. 5, 1988, Seiten 21 ff. ist ein feststoffisolierter Verteiltransformator bekannt, bei dem Wicklungen in Gießharz eingegossen sind. Zusätzlich sind in das Gießharz sogenannte Wärmerohre miteingegossen, die der Kühlung des Transformators dienen. Die Wärmerohre sind jeweils in sich abgeschlossen und weisen einen Verdampferteil und einen Kondensatorteil auf. Die Wärmerohre sind dabei so angeordnet, dass der Verdampferteil innerhalb des Bereichs des Gießharzkörpers angeordnet ist, aus dem Wärme abgeführt werden soll. Das Kondensatorteil jedes Wärmerohrs befindet sich dabei in einem Bereich des Gießharzkörpers, in dem Wärme abgegeben werden kann. Innerhalb eines solchen Wärmerohrs ist eine Flüssigkeit vorgesehen. Diese verdampft im Betrieb durch die dem Verdampferteil zugeführte Wärme aus den Wicklungen. Durch die Verdampfung wird der Bereich, in dem sich der Verdampferteil befindet, gekühlt. Der Dampf setzt sich im Kondensatorteil ab und kondensiert unter Abgabe von Wärme an den Bereich im Gießharzkörper außerhalb des Kondensatorteils.From the article World's first distribution transformer with solid insulation ", ABB Technology No. 5, 1988, pages 21 ff., A solid-insulated distribution transformer is known, in which windings are cast in cast resin. In addition, so-called heat pipes are cast into the cast resin, which serve to cool the transformer The heat pipes are each self-contained and have an evaporator part and a condenser part. The heat pipes are arranged such that the evaporator part is arranged within the region of the cast resin body from which heat is to be removed. The condenser part of each heat pipe is located in an area of the cast resin body in which heat can be given off. A liquid is provided within such a heat pipe. This liquid evaporates during operation by the heat supplied to the evaporator part from the windings. Evaporation cools the area in which the evaporator part is located . D the steam settles in the condenser part and condenses, releasing heat to the area in the cast resin body outside the condenser part.

Aufgabe der Erfindung ist es, einen Transformator der eingangs angegebenen Art anzugeben, bei dem sich eine ausreichende Kühlung aller Wicklungskombinationen mit vergleichsweise geringerem Aufwand erreichen lässt.The object of the invention is to provide a transformer Specify the type specified at the beginning, in which a adequate cooling of all winding combinations with can achieve comparatively less effort.

Die auf den Transformator gerichtete Aufgabe wird erfindungsgemäß durch einen Transformator nach dem Oberbegriff des Patentanspruchs 1 gelöst, bei dem bei der ersten und/oder der dritten Wicklungskombination jeweils das Kühlelement weggelassen ist. The object directed to the transformer is invented by a transformer according to the preamble of the claim 1 solved, in the case of the first and / or the third winding combination each the cooling element is omitted.

Die Erfindung beruht auf der Erkenntnis, daß bei einem freistehenden Transformator nach dem Stand der Technik die beiden äußeren Wicklungskombinationen, also die erste und die dritte Wicklungskombination, im Betrieb keine so starke Kühlung wie bisher angenommen erfordern. Durchgeführte Untersuchungen haben nämlich ergeben, daß sich im Normalbetrieb die zwei äußeren Wicklungskombinationen weniger stark als die mittlere Wicklungskombination erwärmen. In vorteilhafter Weise kann also bei beiden thermisch geringer belasteten äußeren Wicklungskombinationen des Transformators jeweils das standardmäßig beim Stand der Technik vorgesehene Kühlelement weggelassen und dadurch eingespart werden. Erreicht wird außerdem, daß der Temperaturunterschied zwischen den äußeren Wicklungskombinationen und der mittleren, also zweiten Wicklungskombination verringert ist.The invention is based on the knowledge that in one free-standing transformer according to the state of the art two outer winding combinations, i.e. the first and the third winding combination, not as strong in operation Require cooling as previously thought. Carried out Studies have shown that in normal operation the two outer winding combinations less warm up much more than the middle winding combination. In can advantageously be thermally lower in both loaded outer winding combinations of the transformer in each case that which is provided as standard in the prior art Cooling element omitted and thus saved. Reached will also show that the temperature difference between the outer winding combinations and the middle, so second winding combination is reduced.

Ist der erfindungsgemäße Transformator für eine Aufstellung vorgesehen, bei der die Wäremeabfuhr aus einer seiner äußeren Wicklungskombinationen, beispielsweise der ersten Wicklungskombination erschwert ist (zum Beispiel durch seine Anordnung in der Ecke eines Gebäudes), dann kann die erste Wicklungskombination wie beim Stand der Technik auch ein Kühlelement aufweisen. In diesem Fall ist also das Kühlelement nur bei einer der Wicklungskombinationen - hier der dritten Wicklungskombination -weggelassen.Is the transformer according to the invention for an installation provided in which the heat dissipation from one of its outer Winding combinations, for example the first Winding combination is difficult (for example, by its Arrangement in the corner of a building), then the first Winding combination as in the prior art Have cooling element. In this case it is the cooling element only with one of the winding combinations - here the third winding combination - omitted.

Bevorzugt weist jede Wicklungskombination mit einem Kühlelement eine erste Wicklung auf, die von einer zweiten Wicklung unter Belassung eines Zwischenraums umgeben ist, wobei das Kühlelement im Zwischenraum angeordnet ist. Der Zwischenraum kann auch als Kühlluftkanal dienen, in dem Luft zur Kühlung der zweiten Wicklungskombination strömt. Durch die Anordnung des Kühlelements im Zwischenraum werden im Betrieb beide Wicklungen der zweiten Wicklungskombination gemeinsam gekühlt. Each winding combination preferably has one Cooling element on a first winding by a second The winding is surrounded, leaving a gap, wherein the cooling element is arranged in the space. The Gap can also serve as a cooling air duct in the air flows to cool the second winding combination. By the arrangement of the cooling element in the space are in Operation of both windings of the second winding combination cooled together.

Das Kühlelement kann dabei beispielsweise so ausgebildet sein, daß eine besonders große Kühlfläche vorhanden ist. Unter Kühlfläche wird dabei die Fläche verstanden, die der Wärmeabgabe an die im Zwischenraum strömende Luft dient.The cooling element can be designed in this way, for example be that there is a particularly large cooling surface. Under Cooling surface is understood to mean the surface that gives off heat to the air flowing in the space.

Das Kühlelement kann auch als Gebläse ausgeführt sein, durch das ein großer Luftmassenstrom durch den Zwischenraum getrieben wird.The cooling element can also be designed as a blower through which is a large air mass flow through the space is driven.

Bei einer bevorzugten Ausführungsform ist das Kühlelement als Kühlzylinder ausgebildet. Unter Kühlzylinder wird dabei jede Art von Rohr verstanden. Dieses Rohr kann berührungsfrei zur ersten Wicklung und berührungsfrei zur zweiten Wicklung im Zwischenraum angeordnet sein und die Unterspannungswicklung koaxial umgeben. Dadurch ist der Zwischenraum in einen inneren, zwischen dem Kühlzylinder und der ersten Wicklung angeordneten Kühlkanal und einen äußeren, zwischen dem Kühlzylinder und der zweiten Wicklung angeordneten Kühlkanal geteilt. Im Normalbetrieb geben die erste und die zweite Wicklung Wärme auch in Form von Strahlung an den Kühlzylinder ab. Die in den Kühlkanälen strömende Luft nimmt die im Kühlzylinder zwischengespeicherte Wärme an dessen Mantelflächen auf und führt sie ab. Dadurch ist die wirksame Kühlfläche im Vergleich zu einer Wicklungskombination ohne Kühlzylinder größer, und die erreichbare Kühlleistung ist höher. Der Kühlzylinder kann dabei so ausgebildet sein, daß er sich über die axiale Ausdehnung der Wicklungskombination hinaus erstreckt.In a preferred embodiment, the cooling element is as Cooling cylinder trained. Each is under cooling cylinder Kind of pipe understood. This pipe can be used without contact first winding and contactless to the second winding in the Intermediate space and the undervoltage winding surrounded coaxially. This makes the gap into one inner, between the cooling cylinder and the first winding arranged cooling channel and an outer, between the cooling cylinder and the second winding arranged cooling channel. In normal operation, the first and the second winding Heat also in the form of radiation from the cooling cylinder. The air flowing in the cooling channels takes that in the cooling cylinder temporarily stored heat on its lateral surfaces and leads them away. This compares the effective cooling surface to a winding combination without cooling cylinder larger, and the achievable cooling capacity is higher. The cooling cylinder can be designed so that it over the axial extension of the winding combination extends beyond.

Nach einer weiteren bevorzugten Ausführungsform ist das Kühlelement so ausgebildet, daß es seine jeweilige Wicklungskombination berührt. Das Kühlelement kann dann jede Anordnung sein, die unter Berührung der ersten Wicklung und/oder der zweiten Wicklung Wärme aufnimmt und an die durchströmende Kühlluft abgibt. An Orten, an denen das Kühlelement die Wicklung oder die Wicklungen berührt, geht Wärme mit einer hohen Wärmeübergangszahl in das Kühlelement über. Das Kühlelement kann somit beispielsweise als ein zylindrisches Rohr ausgebildet sein, das den Zwischenraum vollständig ausfüllt und das von einer Vielzahl von Kühlkanälen durchzogen ist, durch die Luft führbar ist. Die vom Kühlkörper aufgenommene Wärme wird in die in Kühlkanälen strömende Luft abgegeben. Die in der oder in den Wicklungen entstehende Wärme kann mit dem Kühlkörper schnell aufgenommen und schnell abgeführt werden, so daß die Wicklung oder die Wicklungen mit hoher Kühlleistung gekühlt werden.According to a further preferred embodiment, the cooling element is trained to be its respective Touches the winding combination. The cooling element can then each Be arrangement that touches the first winding and / or the second winding absorbs heat and to the emits cooling air flowing through. In places where that Cooling element touches the winding or the windings goes Heat with a high heat transfer coefficient in the cooling element about. The cooling element can thus, for example, as a be cylindrical tube formed the space completely filled out by a variety of Cooling channels is crossed through which air can be guided. The Heat absorbed by the heat sink is transferred to the cooling channels flowing air released. The in or in the windings The heat generated can be absorbed quickly with the heat sink and quickly dissipated so that the winding or the Windings are cooled with high cooling capacity.

Bevorzugt besteht das Kühlelement zumindest teilweise aus Kunststoff. Kunststoffe besitzen im allgemeinen eine hohe elektrische Isolationsfestigkeit. Bei der Ausführung des Kühlelements, teilweise oder vollständig aus Kunststoff, ist sichergestellt, daß die Spannungsfestigkeiten der Wicklungen (gegeneinander und jeweils intern) der zweiten Wicklungskombination trotz Anordnung des Kühlelements gewährleistet ist.The cooling element preferably consists at least partially Plastic. Plastics are generally high electrical insulation resistance. When executing the Cooling element, partially or completely made of plastic ensured that the dielectric strengths of the windings (against each other and internally) of the second Winding combination despite the arrangement of the cooling element is guaranteed.

Das Kühlelement kann aber auch zumindest teilweise aus Metall bestehen. Metalle weisen eine hohe Wärmeleitfähigkeit auf, so daß Wärme mit dem aus Metall gebildeten Kühlelement schnell abgeführt werden kann. Bei der Ausbildung des Kühlelements aus Metall ist aber sicherzustellen, daß die erforderlichen Spannungsfestigkeiten der Wicklungen eingehalten sind.The cooling element can also be at least partially made of metal consist. Metals have a high thermal conductivity, so that heat quickly with the metal cooling element can be dissipated. In the formation of the cooling element made of metal, however, must ensure that the necessary Dielectric strengths of the windings are observed.

Das Kühlelement ist vorzugsweise so ausgelegt, daß es die zweite Wicklungskombination zumindest nahezu auf die Temperatur kühlt, auf der sich im Betrieb die erste Wicklungskombination befindet. Das Kühlelement kann beispielsweise auch mit Rippen ausgeführt sein, um eine große Kühlelementoberfläche zu bilden.The cooling element is preferably designed so that it second winding combination at least almost to the temperature cools on which the first winding combination is in operation located. The cooling element can also be used, for example Ribs are made to cover a large cooling element surface to build.

Die hier beschriebenen Maßnahmen sind insbesondere für einen Transformator geeignet, der als Gießharz-Transformator ausgebildet ist. Unter Gießharz-Transformatoren werden alle Arten von Transformatoren verstanden, bei denen zumindest eine Wicklung von Gießharz umschlossen ist. Die mit Gießharz umschlossene Wicklung ist sicher verpackt und dadurch gegen Staubablagerungen geschützt. Weiterhin ist sie weitgehend wartungsfrei und unempfindlich gegen Berührungen.The measures described here are especially for one Transformer suitable as a cast resin transformer is trained. Cast resin transformers are all Understand types of transformers, at least a winding of resin is enclosed. The one with cast resin enclosed winding is securely packed and therefore against Dust deposits protected. Furthermore, it is largely maintenance-free and insensitive to touch.

Die Erfindung betrifft auch ein Verfahren zur Kühlung eines Transformators im Normalbetrieb, der jeweils stehend und in aufsteigender Zählung nebeneinander in einer Reihe angeordnet eine erste, eine zweite und eine dritte Wicklungskombination aufweist.The invention also relates to a method for cooling a Transformers in normal operation, each standing and in ascending count next to each other in a row a first, a second and a third winding combination having.

Ein solches Kühlverfahren ist ebenfalls aus der schon oben genannten Produktschrift bekannt. Die Wicklungskombinationen des dort beschriebenen Transformators werden durch Luftkühlung gekühlt. Dazu wird Kühlluft durch die Ringkanäle jeder Wicklungskombination geleitet.Such a cooling process is also from the above known product specification known. The winding combinations of the transformer described there are by air cooling chilled. This is done by cooling air through the ring channels every winding combination.

Der Erfindung liegt die weitere Aufgabe zugrunde, das oben angegebene Verfahren zur Kühlung eines Transformators dahingehend zu verbessern, dass dessen Wicklungskombinationen auf einfache Weise so gekühlt werden, dass sie im Normalbetrieb eine weitgehend gleiche Temperatur annehmen.The invention is based on the further object, the above specified method for cooling a transformer to improve in that its winding combinations are easily cooled so that they can be Normal operation assume a largely identical temperature.

Die auf das Verfahren zur Kühlung eines Transformators, der jeweils stehend und in aufsteigender Zählung nebeneinander in einer Reihe angeordnet eine erste, eine zweite und eine dritte Wicklungskombination aufweist, gerichtete Aufgabe wird erfindungsgemäß dadurch gelöst, daß die thermisch am höchsten belastete Wicklungskombination mit einer höheren Kühlleistung gekühlt wird als eine thermisch geringer belastete Wicklungskombination.The on the process of cooling a transformer, the each standing and next to each other in ascending count arranged in a row a first, a second and a has third winding combination, directed task solved according to the invention in that the thermally highest loaded winding combination with a higher cooling capacity is cooled as a thermally less loaded Winding combination.

Durch dieses Verfahren wird der thermisch höheren Belastung beispielsweise der zweiten Wicklungskombination durch eine Kühlung mit entsprechend höherer Kühlleistung entgegengewirkt. Zur Beeinflussung der Kühlleistung kann beispielsweise die Masse der durch den Zwischenraum der betreffenden Wicklungskombination oder durch die Kühlluftkanäle eines Kühlkörpers strömenden Luft durch Anordnung eines Gebläses an entsprechender Stelle eingestellt werden.With this method the thermal load is higher for example the second winding combination by a Cooling with a correspondingly higher cooling capacity counteracted. Can influence the cooling capacity for example the mass of the space between the concerned winding combination or by the Cooling air channels of a heat sink flowing air through Arrangement of a fan set at the appropriate point become.

Bevorzugt werden die Wicklungskombinationen auf nahezu die gleiche Temperatur gekühlt. Dadurch können die Wicklungskombinationen hinsichtlich ihrer Wärmefestigkeit gleich ausgebildet sein, wobei sich der Aufwand hierfür in Grenzen hält. Auch unter Berücksichtigung des Aufwands für die Luftkühlung ergibt sich eine kostensparende Lösung.The winding combinations are preferred to almost that cooled at the same temperature. This allows the Winding combinations with regard to their heat resistance be of the same design, the effort involved in this Limits. Also taking into account the effort for air cooling results in a cost-saving solution.

Anhand der in der Zeichnung dargestellten Ausführungsbeispiele werden der erfindungsgemäße Transformator und das erfindungsgemäße Verfahren näher erläutert. Es zeigen schematisiert und teilweise nicht maßstäblich:

FIG 1
einen Schnitt durch einen Transformator mit drei Wicklungskombinationen und einem Kühlelement,
FIG 2
einen Schnitt durch die zweite Wicklungskombination mit einem alternativen Kühlelement,
FIG 3
einen Querschnitt durch die zweite Wicklungskombination gemäß FIG 2 mit einem alternativen Kühlelement gemäß einer ersten Modifikation und
FIG 4
einen Querschnitt durch die zweite Wicklungskombination mit einer zweiten Modifikation und
Figur 5
eine Draufsicht auf einen Querschnitt durch einen in einer Ecke einer Gebäudewand angeordneten Transformator.
The transformer according to the invention and the method according to the invention are explained in more detail with reference to the exemplary embodiments shown in the drawing. They show schematically and partly not to scale:
FIG. 1
a section through a transformer with three winding combinations and a cooling element,
FIG 2
2 shows a section through the second winding combination with an alternative cooling element,
FIG 3
a cross section through the second winding combination according to FIG 2 with an alternative cooling element according to a first modification and
FIG 4
a cross section through the second winding combination with a second modification and
Figure 5
a plan view of a cross section through a transformer arranged in a corner of a building wall.

Gleiche Teile sind in den Figuren mit denselben Bezugszeichen versehen. The same parts are given the same reference symbols in the figures Mistake.

In Figur 1 ist ein Schnitt durch einen Transformators 4 gezeigt, der hier ein Drehstrom-Transformator 4 ist. Der Drehstrom-Transformator 4 umfaßt nebeneinander und in einer Reihe angeordnet eine erste Wicklungskombination 1, eine zweite Wicklungskombination 2 und eine dritte Wicklungskombination 3, die jeweils entlang einer vertikalen Achse 31A, 31B bzw. 31C gerichtet sind. Jede der Wicklungskombinationen 1, 2 und 3 umgibt einen Schenkel 5, 6 bzw. 7 eines Transformatorkerns 8, der als EI-Kern oder als 5-Schenkel-Kern ausgeführt ist. Der Transformatorkern 8 dient in bekannter Weise der Führung von im Betrieb des Drehstrom-Transformators 4 erzeugten magnetischen Flüssen.1 shows a section through a transformer 4, which is a three-phase transformer 4 here. The three-phase transformer 4 includes side by side and in a row arranged a first winding combination 1, a second Winding combination 2 and a third winding combination 3, each along a vertical axis 31A, 31B and 31C are directed. Each of the winding combinations 1, 2 and 3 surrounds a leg 5, 6 and 7 of a transformer core 8, which is designed as an EI core or as a 5-leg core. The transformer core 8 is used for guidance in a known manner of magnetic generated during operation of the three-phase transformer 4 Rivers.

Jede der Wicklungskombinationen 1, 2 und 3 weist eine erste Wicklung 12, 13 bzw. 14 sowie eine zweite Wicklung 9, 10 bzw. 11 auf. Die ersten Wicklungen 12, 13 und 14 sind hier als Unterspannungswicklungen 12, 13 und 14 und die zweiten Wicklungen 9, 10 und 11 sind hier als Oberspannungswicklungen 9, 10, 11 ausgeführt. Jede Oberspannungswicklung 9, 10 und 11 umgibt die zugeordnete Unterspannungswicklung 12, 13 bzw. 14 koaxial unter Belassung eines Zwischenraums 15, 16 bzw. 17. Die Oberspannungswicklungen 9, 10 und 11 und die Unterspannungswicklungen 12, 13 und 14 umfassen jeweils eine nicht näher dargestellte elektrische Isolation. Diese Isolationen besitzen eine Grenztemperatur, bis zu der sie erwärmbar sind, ohne daß sie unzulässig altern.Each of the winding combinations 1, 2 and 3 has a first one Winding 12, 13 or 14 and a second winding 9, 10 or 11 on. The first windings 12, 13 and 14 are here as undervoltage windings 12, 13 and 14 and the second windings 9, 10 and 11 are here as high-voltage windings 9, 10, 11 executed. Each high voltage winding 9, 10 and 11 surrounds the associated undervoltage winding 12, 13 or 14 coaxially leaving a space 15, 16 and 17, respectively. The high-voltage windings 9, 10 and 11 and the undervoltage windings 12, 13 and 14 each include one not shown Electric Isolation. Have these isolations a limit temperature up to which they can be heated without they age improperly.

Die elektrischen Anschlüsse zur elektrischen Kontaktierung der Wicklungen 9 bis 14 sind zur besseren Übersichtlichkeit nicht dargestellt.The electrical connections for electrical contacting the windings 9 to 14 are for better clarity not shown.

Während des Normalbetriebs werden die Oberspannungswicklungen 9, 10 und 11 und die Unterspannungswicklungen 12, 13 und 14 jeweils durch eine weitgehend gleiche elektrische Normalleistung beansprucht, wodurch sie sich erwärmen. Sie werden daher zunächst einmal durch Luftkühlung gekühlt, worauf später näher eingegangen wird. Die zweite Wicklungskombination 2 wird im Betrieb aufgrund ihrer baulichen Anordnung zwischen der ersten Wicklungskombination 1 und der dritten Wicklungskombination 3 stärker erwärmt als die beiden äußeren Wicklungskombinationen 1 und 3. Diese höhere Erwärmung ist vor allem darauf zurückzuführen, daß die mittlere Wicklungskombination 2 auch durch die von den beiden Wicklungskombinationen 1 und 3 abgegebene Wärme erwärmt wird. Daher umfaßt im Unterschied zum Stand der Technik nur die zweite Wicklungskombination 2 ein Kühlelement 18, das als Kühlzylinder ausgeführt ist. Die Wicklungskombinationen 1 und 3 sind frei von eingebauten passiven Kühlelementen.During normal operation, the high-voltage windings 9, 10 and 11 and the undervoltage windings 12, 13 and 14 each by largely the same electrical normal power claimed, causing them to warm up. Therefore you will first cooled by air cooling, then later is discussed in more detail. The second winding combination 2 is in operation due to their structural arrangement between the first winding combination 1 and the third winding combination 3 warms more than the two outer winding combinations 1 and 3. This higher warming is before all due to the fact that the middle winding combination 2 also from the two winding combinations 1 and 3 emitted heat is heated. Therefore included in the difference only the second winding combination to the state of the art 2 a cooling element 18, which is designed as a cooling cylinder is. The winding combinations 1 and 3 are free of built-in passive cooling elements.

Das Kühlelement 18 ist als Rohr ausgebildet und im Zwischenraum 16 angeordnet. Es umgibt die Unterspannungswicklung 13 berührungsfrei und ist berührungsfrei von der Oberspannungswicklung 10 umgeben. Er teilt den Zwischenraum 16 in einen zwischen der Oberspannungswicklung 16 und dem Kühlelement 18 befindlichen äußeren Kühlkanal 19 und einen zwischen dem Kühlelement 18 und der Unterspannungswicklung 13 befindlichen inneren Kühlkanal 20. Durch die Anordnung des Kühlelement 18 im Zwischenraum 16 werden die Oberspannungswicklung 10 und die Unterspannungswicklung 13 gemeinsam im Betrieb gekühlt. Hervorgehoben werden soll noch einmal, daß die standardmäßig beim Drehstrom-Transformator nach dem Stand der Technik bei der ersten und der dritten Wicklungskombination 1 und 3 vorgesehenen Kühlelemente weggelassen und eingespart sind. Damit ergibt sich eine Reduzierung des Aufwands. Dadurch werden die im Vergleich zur zweiten Wicklungskombination 2 thermisch geringer belasteten Wicklungskombinationen 1 und 2 jeweils mit einer geringeren Kühlleistung gekühlt, als die zweite Wicklungskombination.The cooling element 18 is designed as a tube and in the space 16 arranged. It surrounds the undervoltage winding 13 non-contact and is non-contact from the high-voltage winding 10 surrounded. It divides the space 16 into one between the high-voltage winding 16 and the cooling element 18 located outer cooling channel 19 and one between the Cooling element 18 and the undervoltage winding 13 located inner cooling duct 20. The arrangement of the cooling element 18 in the space 16, the high-voltage winding 10 and the low-voltage winding 13 is cooled together during operation. It should be emphasized once again that the default in the three-phase transformer according to the prior art the first and third winding combinations 1 and 3 provided Cooling elements are omitted and saved. In order to there is a reduction in effort. This will make the compared to the second winding combination 2 thermally less loaded winding combinations 1 and 2 each cooled with a lower cooling capacity than the second Winding combination.

Die in den Oberspannungswicklungen 9 und 11 und in den Unterspannungswicklungen 12 und 14 im Betrieb entstehende Wärme wird an die durch die Zwischenräume 15 bzw. 17 strömende Luft 21 bzw. 23 abgegeben. Diese strömt jeweils in vertikaler Richtung von unten nach oben (Konvektionskühlung). Zur Unterstützung kann ein Gebläse (nicht gezeigt) vorgesehen sein. Die in der mittleren Unterspannungswicklung 13 und in der mittleren Oberspannungswicklung 10 entstehende Wärme wird direkt an die durch die Kühlkanäle 19 und 20 strömende Luft 22 und durch Strahlung an das Kühlelement 18 abgegeben. Das Kühlelement 18 wiederum gibt die aufgenommene Wärme an die in den Kühlkanälen 19 und 20 strömende Luft 22 ab. Die erwärmte Luft 22 strömt von unten nach oben und führt die aufgenommene Wärme ab (Luftkühlung). Die Zwischenräume 15 und 17 und die Kühlkanäle 19, 20 dienen also als Kühlluftkanäle.Those in the high voltage windings 9 and 11 and in the low voltage windings 12 and 14 heat generated during operation is to the air flowing through the spaces 15 and 17 21 or 23 delivered. This flows vertically Direction from bottom to top (convection cooling). For support a blower (not shown) may be provided. The in the middle undervoltage winding 13 and in the middle high-voltage winding 10 heat is generated directly to the air 22 flowing through the cooling channels 19 and 20 and emitted to the cooling element 18 by radiation. The Cooling element 18 in turn gives the absorbed heat to the in Air 22 flowing from the cooling channels 19 and 20. The warmed Air 22 flows from the bottom up and carries the absorbed Heat from (air cooling). The spaces 15 and 17 and the Cooling channels 19, 20 thus serve as cooling air channels.

Durch gezielte Dimensionierung des Kühlelements 18 kann die mittlere Wicklungskombination 2 so gekühlt werden, daß sie im Betrieb mit Normalleistung nahezu die gleiche Temperatur annimmt, wie die erste und wie die dritte Wicklungskombination 1 bzw. 3. Die Normalleistung kann so hoch gewählt werden, daß die vorgenannte gleiche Temperatur gleich der Grenztemperatur ist. Die Wärmefestigkeit aller Isolierungen der Wicklungskombinationen 1 bis 3 kann dann im Betrieb bis an die Grenztemperatur ausgenutzt werden.By targeted dimensioning of the cooling element 18, the medium winding combination 2 are cooled so that they in Operation with normal power assumes almost the same temperature like the first and like the third winding combination 1 or 3. The normal power can be selected so high that the aforementioned same temperature equal to the limit temperature is. The heat resistance of all insulation of the winding combinations 1 to 3 can then operate up to the limit temperature be exploited.

Das zylindrische Kühlelement 18 kann insgesamt aus einem Kunststoff ausgeführt sein. Kunststoffe weisen im allgemeinen eine hohe Isolationsfestigkeit auf, so daß bei einer Ausführung des Kühlelements 18 aus Kunststoff die Isolationsfestigkeit der zweiten Wicklungskombination 2 voll gewährleistet ist.The cylindrical cooling element 18 can consist of one Be made of plastic. Plastics generally have a high insulation strength, so that in one execution of the cooling element 18 made of plastic, the insulation strength the second winding combination 2 fully guaranteed is.

Im Kühlelement 18 kann auch ein Metall enthalten sein. Metalle weisen eine hohe Wärmeleitfähigkeit auf, so daß vom Kühlelement 18 aufgenommene Wärme gut geleitet und abgeführt wird und die Wicklungskombination 2 gut gekühlt wird. Bei der Ausbildung des Kühlelements 18 mit einem Metall ist sicherzustellen, daß die elektrischen Eigenschaften der zweiten Wicklungskombination 2 den Anforderungen der gängigen Prüfbestimmungen entsprechen.A metal can also be contained in the cooling element 18. Metals have a high thermal conductivity, so that from Cooling element 18 heat well conducted and dissipated is and the winding combination 2 is cooled well. In the Formation of the cooling element 18 with a metal must be ensured that the electrical properties of the second winding combination 2 the requirements of the common test regulations correspond.

In Figur 2 ist ein Schnitt durch die zweite Wicklungskombination 2 mit einem alternativen Kühlelement 34 dargestellt, das als berührender Kühlkörper ausgeführt ist. Das Kühlelement 34 ist auch hier im Zwischenraum 16 angeordnet; es füllt aber diesen unter flächiger Berührung der Oberspannungswicklung 10 und der Unterspannungswicklung 13 aus. Es kann sich dabei in Richtung der Achse 31B über die Wicklungen 10 und 13 hinaus erstrecken, oder es kann in dieser Richtung nur einen Teil des Zwischenraums 16 ausfüllen. Durch die flächige Berührung mit den Wicklungen 10 und 13 geht Wärme aus diesen mit hoher Wärmeübergangszahl in das Kühlelement 34 über. Später erläuterte Kühlkanäle im Kühlelement 34 sind - wie mit Pfeilen angedeutet - von Kühlluft 22 durchströmbar (siehe auch FIG 3). Die vom Kühlelement 34 aus den Wicklungen 10 und 13 aufgenommene Wärme wird an die Luft 22 abgegeben, die dadurch in Strömung gehalten ist. Die Wärme wird mit der Luft 22 aus der Wicklungskombination 2 abgeführt. Durch das Kühlelement 34 ergibt sich für die Wicklungskombination 2 eine nennenswerte Kühlfläche.In Figure 2 is a section through the second winding combination 2 with an alternative cooling element 34 which is designed as a touching heat sink. The cooling element 34 is also arranged in the space 16; but it fills this with flat contact of the high-voltage winding 10 and the undervoltage winding 13. It can be in Direction of axis 31B beyond windings 10 and 13 extend, or it can only part in this direction fill in the space 16. Through the flat touch with the windings 10 and 13, heat comes from these with high Heat transfer coefficient into the cooling element 34. Later explained Cooling channels in the cooling element 34 are - as indicated by arrows - Can be flowed through by cooling air 22 (see also FIG 3). The one taken up by the cooling element 34 from the windings 10 and 13 Heat is given off to the air 22, which thereby in Flow is maintained. The heat is dissipated with the air 22 Winding combination 2 dissipated. Through the cooling element 34 For winding combination 2 there is a noteworthy result Cooling surface.

In Figur 3 ist ein Querschnitt durch die zweite Wicklungskombination 2 gemäß FIG 2 mit einem alternativen Kühlelement 34 gemäß einer ersten Modifikation dargestellt. Das Kühlelement 34 ist als ein entlang der Achse 31B gerichtetes Rohr ausgeführt, dessen Mantel eine Vielzahl in Achsenrichtung gerichteter Kühlkanäle 35 zur Durchströmung mit Luft 22 aufweist.In Figure 3 is a cross section through the second winding combination 2 with an alternative cooling element 34 shown according to a first modification. The cooling element 34 is designed as a tube directed along axis 31B, the jacket of which has a plurality of axially directed Has cooling channels 35 for the flow of air 22.

In Figur 4 ist ein Querschnitt durch die zweite Wicklungskombination 2 mit einer zweiten Modifikation des alternativen Kühlelements 34 gezeigt. Im Unterschied zu FIG 3 ist das Kühlelement 34 aus mehreren axial gerichteten Kreisrohrmantelsegmenten 36 gebildet. Die Kreisrohrmantelsegmente 36 sind im Zwischenraum 16 in Umfangsrichtung 38 von einander beabstandet angeordnet, wodurch zwischen jeweils zwei benachbarten Kreisrohrmantelsegmenten 36 ein weiterer Kühlluftkanal 39 zur Durchströmung mit Kühlluft 22 gebildet ist. Die Kreisrohrmantelsegmente 36 weisen in Richtung der Achse 31B gerichtete Kühlluftkanäle 37 zur Durchströmung mit Kühlluft 22 auf.In Figure 4 is a cross section through the second winding combination 2 with a second modification of the alternative Cooling element 34 shown. In contrast to FIG 3 that is Cooling element 34 from a plurality of axially directed circular tube jacket segments 36 formed. The circular tube jacket segments 36 are spaced apart from one another in the space 16 in the circumferential direction 38 arranged, whereby between two adjacent Circular tube jacket segments 36 a further cooling air duct 39 for the flow of cooling air 22 is formed. The circular tube jacket segments 36 point in the direction of the axis 31B Cooling air channels 37 for the flow of cooling air 22 on.

In Figur 5 ist eine Draufsicht auf einen Querschnitt durch einen in der Ecke 40 einer Gebäudewand 41 angeordneten Transformator 4A gezeigt. Durch diese Anordnung des Transformators 4a in der Ecke 40, ist die Wärmeabfuhr aus der ersten Wicklungskombination 1 im Vergleich zur Wärmeabfuhr aus der dritten Wicklungskombination 3 erschwert, da die Wicklungskombination 1 von der Gebäudewand 41 und von der zweiten Wicklungskombination 2 umgeben ist und nur zu einer Seite 42 frei zugänglich ist. Dadurch wird im Betrieb auch die erste Wicklungskombination 1 thermisch höher belastet als die dritte Wicklungskombination 3. Daher ist bei der ersten Wicklungskombination 1 in deren Zwischenraum 15 ebenfalls ein Kühlelement 43 angeordnet. Das Kühlelement 43 kann auf die thermische Belastung der Wicklungskombination 1 abgestimmt ausgebildet sein, so dass die Wicklungskombination 1 im Betrieb auf eine nahezu gleiche Temperatur wie die Wicklungskombination 3 gekühlt wird. Das Kühlelement 43 kann aber auch - der Einfachheit halber - baugleich mit dem Kühlelement 18 ausgebildet sein. Im vorliegenden Fall ist das Kühlelement 43 als Kühlzylinder ausgebildet und teilt den Zwischenraum 15 in einen äußeren Ringkanal 44 und in einen inneren Ringkanal 45. Das Kühlelement 1 wird also auch wie die Wicklungskombination 2 durch Luftkühlung gekühlt. Beim Tansformator 4A ist also nur bei der thermisch am geringsten belasteten Wicklungskombination 3 kein Kühlelement vorgesehen, so dass diese Wicklungskombination 3 mit einer geringeren Kühlleistung gekühlt wird, als beispielsweise die zweite Wicklungskombination 2.In Figure 5 is a plan view of a cross section through one arranged in the corner 40 of a building wall 41 Transformer 4A shown. By this arrangement of the Transformer 4a in the corner 40, is the heat dissipation from the first winding combination 1 compared to heat dissipation difficult from the third winding combination 3 because the Winding combination 1 from the building wall 41 and from the second winding combination 2 is surrounded and only one Page 42 is freely accessible. This will also work the first winding combination 1 is subjected to a higher thermal load than the third winding combination 3. Therefore, the first Winding combination 1 in the space 15 also Cooling element 43 arranged. The cooling element 43 can on the thermal load of the winding combination 1 matched be designed so that the winding combination 1 in Operation at almost the same temperature as that Winding combination 3 is cooled. The cooling element 43 can but also - for the sake of simplicity - structurally identical to the Cooling element 18 may be formed. In the present case it is Cooling element 43 designed as a cooling cylinder and divides the Gap 15 in an outer annular channel 44 and in one inner ring channel 45. The cooling element 1 is also like the winding combination 2 is cooled by air cooling. At the Transformer 4A is only the lowest thermally loaded winding combination 3 no cooling element provided so that this winding combination 3 with a lower cooling capacity is cooled than, for example second winding combination 2.

Claims (11)

Transformator (4) mit einer ersten (1), einer zweiten (2) und einer dritten Wicklungskombination (3), die jeweils stehend und in aufsteigender Zählung nebeneinander in einer Reihe angeordnet sind und jeweils ein Kühlelement (18,34) aufweisen,
dadurch gekennzeichnet, daß bei der ersten (1) und/oder der dritten Wicklungskombination (3) jeweils das Kühlelement weggelassen ist.Transformer (4) with a first (1), a second (2) and a third winding combination (3), each of which is arranged standing next to and in ascending order next to each other in a row and each has a cooling element (18, 34),
characterized in that the cooling element is omitted in the first (1) and / or the third winding combination (3). Transformator (4) nach Anspruch 1,
dadurch gekennzeichnet, daß jede Wicklungskombination (2) mit einem Kühlelement eine erste Wicklung (13) aufweist, die von einer zweiten Wicklung (10) unter Belassung eines Zwischenraums (16) umgeben ist, und daß das Kühlelement (18, 34) im Zwischenraum (16) angeordnet ist.Transformer (4) according to claim 1,
characterized in that each winding combination (2) with a cooling element has a first winding (13) which is surrounded by a second winding (10) leaving an intermediate space (16), and in that the cooling element (18, 34) in the intermediate space ( 16) is arranged. Transformator (4) nach Anspruch 2,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) als Kühlzylinder (18) ausgebildet ist.Transformer (4) according to claim 2,
characterized in that the cooling element (18, 34) is designed as a cooling cylinder (18). Transformator (4) nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) seine jeweilige Wicklungskombination (2) berührt.Transformer (4) according to one of claims 1 to 3,
characterized in that the cooling element (18, 34) touches its respective winding combination (2). Transformator (4) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) mindestens teilweise aus Kunststoff besteht.Transformer (4) according to one of the preceding claims,
characterized in that the cooling element (18, 34) consists at least partially of plastic. Transformator (4) nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) mindestens teilweise aus Metall besteht.Transformer (4) according to one of the preceding claims,
characterized in that the cooling element (18, 34) consists at least partially of metal. Transformator (4) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß er als Gießharz-Transformator ausgebildet ist.Transformer (4) according to one of the preceding claims,
characterized in that it is designed as a cast resin transformer. Transformator (4) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) so ausgelegt ist, daß es die jeweilige Wicklungskombination (2) zumindest nahezu auf die Temperatur kühlt, auf der sich im Betrieb die kühlelementfreie Wicklungskombination (1) befindet.Transformer (4) according to one of the preceding claims,
characterized in that the cooling element (18, 34) is designed such that it cools the respective winding combination (2) at least almost to the temperature at which the cooling element-free winding combination (1) is located during operation. Transformator (4) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Kühlelement (18, 34) Kühlkanäle (35) aufweist.Transformer (4) according to one of the preceding claims,
characterized in that the cooling element (18, 34) has cooling channels (35). Verfahren zur Kühlung eines Transformators (4) im Normalbetrieb, der jeweils stehend und in aufsteigender Zählung nebeneinander in einer Reihe angeordnet eine erste (1), eine zweite (2) und eine dritte Wicklungskombination (3) aufweist,
dadurch gekennzeichnet, daß die thermisch am höchsten belastete Wicklungskombination (2) mit einer höheren Kühlleistung gekühlt wird als eine thermisch geringer belastete Wicklungskombination (3).Method for cooling a transformer (4) in normal operation, each of which has a first (1), a second (2) and a third winding combination (3) arranged standing and in ascending order next to one another in a row,
characterized in that the thermally most loaded winding combination (2) is cooled with a higher cooling capacity than a thermally less loaded winding combination (3). Verfahren nach Anspruch 10,
dadurch gekennzeichnet, daß die Wicklungskombinationen (2) nahezu auf die gleiche Temperatur wie gekühlt werden.A method according to claim 10,
characterized in that the winding combinations (2) are cooled to almost the same temperature as.
EP00250096A 1999-03-18 2000-03-17 Transformer and method of cooling a transformer Expired - Lifetime EP1037220B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19912280A DE19912280C1 (en) 1999-03-18 1999-03-18 Transformer and method for cooling a transformer
DE19912280 1999-03-18

Publications (3)

Publication Number Publication Date
EP1037220A2 true EP1037220A2 (en) 2000-09-20
EP1037220A3 EP1037220A3 (en) 2001-08-22
EP1037220B1 EP1037220B1 (en) 2008-05-07

Family

ID=7901559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00250096A Expired - Lifetime EP1037220B1 (en) 1999-03-18 2000-03-17 Transformer and method of cooling a transformer

Country Status (6)

Country Link
EP (1) EP1037220B1 (en)
AT (1) ATE394781T1 (en)
BR (1) BR0001264A (en)
DE (2) DE19912280C1 (en)
ES (1) ES2302680T3 (en)
PT (1) PT1037220E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7330095B2 (en) 2004-06-11 2008-02-12 Abb Oy Cooled multiphase choke assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10120236C1 (en) * 2001-04-19 2003-01-30 Siemens Ag Electrical winding arrangement
DE10137518C1 (en) 2001-07-30 2003-04-24 Siemens Ag Electrical winding arrangement
DE10148946C2 (en) * 2001-09-28 2003-09-04 Siemens Ag Electrical winding arrangement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1563354A (en) * 1920-08-17 1925-12-01 Westinghouse Electric & Mfg Co Transformer-cooling system
DE1563160A1 (en) * 1966-12-09 1970-04-09 Continental Elektro Ind Ag Transformer, inductor or the like. with gas filling
DE1912760A1 (en) * 1969-03-13 1970-10-01 Licentia Gmbh Arrangement to increase the heat output in transformers, inductors, capacitors and the like.
EP0461664A1 (en) * 1990-06-15 1991-12-18 Mitsubishi Denki Kabushiki Kaisha Electromagnetic induction device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1980288U (en) * 1966-07-26 1968-03-07 Licentia Gmbh WINDING OF TRANSFORMERS AND REACTOR COILS PASTED IN RESIN.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1563354A (en) * 1920-08-17 1925-12-01 Westinghouse Electric & Mfg Co Transformer-cooling system
DE1563160A1 (en) * 1966-12-09 1970-04-09 Continental Elektro Ind Ag Transformer, inductor or the like. with gas filling
DE1912760A1 (en) * 1969-03-13 1970-10-01 Licentia Gmbh Arrangement to increase the heat output in transformers, inductors, capacitors and the like.
EP0461664A1 (en) * 1990-06-15 1991-12-18 Mitsubishi Denki Kabushiki Kaisha Electromagnetic induction device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7330095B2 (en) 2004-06-11 2008-02-12 Abb Oy Cooled multiphase choke assembly

Also Published As

Publication number Publication date
EP1037220A3 (en) 2001-08-22
DE19912280C1 (en) 2000-09-14
DE50015139D1 (en) 2008-06-19
BR0001264A (en) 2000-10-31
EP1037220B1 (en) 2008-05-07
PT1037220E (en) 2008-07-29
ATE394781T1 (en) 2008-05-15
ES2302680T3 (en) 2008-08-01

Similar Documents

Publication Publication Date Title
DE3789570T2 (en) Induction heating and melting systems with induction coils.
DE112009005222B4 (en) Transformer with a heat pipe and method of manufacturing a transformer
DE69401722T2 (en) Superconducting device for residual current limitation
DE69103969T2 (en) Induction heating coil.
DE69002137T2 (en) MAGNETIC BEARING.
DE69333128T2 (en) Power supply line for superconducting magnet system without liquid helium
DE69723435T2 (en) CONTROLLABLE INDUCTOR
DE10033411C2 (en) Actively shielded superconducting magnet with protective device
DE19814897C2 (en) Inductive component for high performance
DE102018105096A1 (en) THROTTLE COIL, MOTOR DRIVER, POWER CONDITIONER AND MACHINE
DE102017130089A1 (en) Columned transformer
DE3728400C1 (en) Contact arrangement for vacuum switch
DE2748479C2 (en) Transition piece between a superconductor and a normal conductor
DE19912280C1 (en) Transformer and method for cooling a transformer
DE102018102893A1 (en) Inductor, motor drive device, power conditioner, and machine
DE1801722A1 (en) transformer
CH290733A (en) Choke coil.
EP0124809B1 (en) Inductive element
DE202013103599U1 (en) Electrical component
DE102018109565A1 (en) coil assembly
DE499534C (en) Coil for electric induction ovens
CH138119A (en) Bushing insulator for high voltages.
CH389765A (en) Electric machine
DE1057219B (en) Medium and high frequency power transformer
EP1845534B1 (en) Switching resistance for a high voltage switch

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010806

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20070110

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SIEMENS SCHWEIZ AG

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50015139

Country of ref document: DE

Date of ref document: 20080619

Kind code of ref document: P

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20080717

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2302680

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080507

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080507

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080807

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080507

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080507

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: SIEMENS SCHWEIZ AG;INTELLECTUAL PROPERTY FREILAGERSTRASSE 40;8047 ZUERICH (CH)

26N No opposition filed

Effective date: 20090210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080808

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090317

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080507

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50015139

Country of ref document: DE

Ref country code: DE

Ref legal event code: R409

Ref document number: 50015139

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R409

Ref document number: 50015139

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCOW

Free format text: NEW ADDRESS: WERNER-VON-SIEMENS-STRASSE 1, 80333 MUENCHEN (DE)

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20190327

Year of fee payment: 20

Ref country code: GB

Payment date: 20190313

Year of fee payment: 20

Ref country code: FR

Payment date: 20190322

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20190320

Year of fee payment: 20

Ref country code: AT

Payment date: 20190207

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20190624

Year of fee payment: 20

Ref country code: PT

Payment date: 20190225

Year of fee payment: 20

Ref country code: DE

Payment date: 20190517

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20190603

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50015139

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20200316

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20200330

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20200316

REG Reference to a national code

Ref country code: BE

Ref legal event code: MK

Effective date: 20200317

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 394781

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200317

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20220128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20200318