EP2485224A2 - Holder for high voltage discharge lines in oil transformers - Google Patents
Holder for high voltage discharge lines in oil transformers Download PDFInfo
- Publication number
- EP2485224A2 EP2485224A2 EP12002296A EP12002296A EP2485224A2 EP 2485224 A2 EP2485224 A2 EP 2485224A2 EP 12002296 A EP12002296 A EP 12002296A EP 12002296 A EP12002296 A EP 12002296A EP 2485224 A2 EP2485224 A2 EP 2485224A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- holder
- holder according
- insulation
- oil
- base module
- 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
Links
- 238000009413 insulation Methods 0.000 claims abstract description 49
- 239000011810 insulating material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
Definitions
- the invention relates to a holder for high-voltage discharges in oil transformers, having a plate-like, two-dimensional outer sides and side edges, elongated insulation base module having at its two ends a respective connection device and in its central region a receiving device for a transverse screen tube.
- the invention also relates to an oil transformer with oil boiler and a high-voltage discharge arranged therein with a shield tube.
- transformers having a rated power of, for example, 100MVA and higher at a rated voltage of 110kV and higher, for example, 800kV are usually designed as oil transformers having a weight of 200t and above.
- the active part of the transformer with iron core and windings is arranged inside a transformer vessel filled with oil, the oil serving both the electrical insulation and the improved cooling.
- the electrical connection of the respective terminals of the active part of the transformer with the Aus effetsisolatoren on the outside of the oil boiler takes place here by electrical conductors which are surrounded at high voltages by a lying at the same potential, insulated shield tube, the isolation of either solid insulating materials or of a barrier system is formed.
- the barrier system is constructed radially symmetrical about the relevant conductor and comprises an electrically conductive shielding tube as needed a plurality of nested spaced isolation barriers.
- the barrier systems required for each individual conductor are guided inside the oil-filled transformer tank by means of a gap formed between the transformer and the boiler wall, whereby, however, minimum separation distances must be maintained.
- the insulated shield tubes are to be supported or held at specific intervals, ie mechanically connected either to the outer wall of the boiler or to a suitable area of the transformer.
- so-called holders are used, which are to be designed as insulators.
- the insulation capability of a holder is less than the isolation capability of pure oil with an identical isolation distance.
- a disadvantage is that especially at high voltages of 380kV and reinforced in the range of 800kV and higher due to insufficient insulation capacity of the holder Aus Obersdome the respective boiler must be performed with a much larger diameter than is required for the isolation of the actual discharge. For example, a dome diameter of 0.8m is no longer sufficient for 380kV at 800kV, and much larger diameters, say 1.5m, are required.
- This object is achieved by a holder of the aforementioned type.
- This is characterized in that the insulation base module is bent several times along its extension between the first and second ends, thereby causing a Kriechwegverinrung, and that transverse to the elongated extension of the insulation basic module more adjacent , which are provided on the flat outer sides and the side edges in a respective plane circumferential slots.
- the basic idea of the invention is to carry out the holder as a bridge, whereby the effective length of insulation is increased by the angulations and thus also the creepage distance along the extent of the bridge-like holder between its two outer ends which are usually at ground potential and the central holding device for high voltage potential for the shield tube.
- a holder is typically designed as a spacer and not for the removal of the entire weight of the diversion tube. The removal of the weight is preferably carried out by support members with vertical orientation, which typically can be made longer, without a space problem occurs within the oil boiler. An inventive holder is then typically arranged horizontally.
- An inventive slot in the holder or the insulation base module rotates around this at least three sides of the cross section in a plane, namely along the two flat outer sides and quasi as intermediate connecting slot across at least one side edge.
- the slots thus also contribute to improved insulation.
- As a starting material for such a bridge-like holder offers an easily editable material such as press chip.
- press chip Through the use of modern milling technologies, a monolithic press chip block can be used to mill almost any variety of shapes for the angling, for example a U-shape or even a meandering shape.
- the aforementioned slots can be cut in a simple manner.
- a bridge-like holder for Austechnischsrohre in particular for their arrangement in Aus effetsdomen a transformer tank, created by which the respective discharge pipe high voltage technology and mechanically safe from the boiler walls is spaced without the distance between the discharge pipe and boiler wall way must be increased.
- the holder may need to be designed so that it is suitable for removing the weight of the discharge pipe.
- the holder according to the invention is carried out symmetrically on both sides of the receiving device.
- This requires a symmetrical isolation behavior on both sides of the isolation device, whereby ultimately the length of the bridge can be kept as short as possible.
- the holder according to the invention has at least two oppositely directed angling along its extent on both sides of the receiving device. These are executed as needed sigmoid similar and thus avoid sharp edges.
- Opposing Anwinkelungen cancel each other along the extension of the holder in about each other, so that, for example, a horizontal course of a holder segment after two opposite Anwinkelungen runs horizontally again.
- a U-like basic shape of a bridge-like holder module can be realized.
- other basic forms that extend the creepage path such as meanders or even a zigzag shape, can be realized. In general, every creep path extending basic shape such as a corkscrew-like spiral is suitable.
- At least one U-shaped insulation plate is fitted in one of the slots form-fitting, optionally also glued.
- Such an insulating plate has, for example, a thickness of 3 mm and also acts to elongate the creepage distance.
- the optional arrangement of such an insulating plate it is possible to provide a standardized bridge-like holder for a certain voltage level, for example, with a span of 1.2m for 800kV, and depending on individual field strength ratios in the oil boiler, if necessary, in critical areas individually to bring about an increase in the dielectric strength of the holder.
- the U-shaped insulation plate is facing away from the more critical with respect to the field strength side of the holder with its open end to fit because it does not contribute to increase the dielectric strength at its open end.
- At least one module insulation section is formed with a shorter and an opposite longer side edge due to the Anwinkelept, wherein at least one of the circumferential slots is provided in this area and wherein at least one U-shaped insulation plate in at least one circumferential slot in the module insulation section is fitted.
- An inventive slot in the holder runs around this on at least three sides of the cross section in a plane, namely along the two flat outer sides and quasi as an intermediate connecting slot across the shorter side edge.
- a matching U-shaped insulation plate whose plate thickness accordingly corresponds to just the thickness of the partially circumferential slot, for example 5mm, can be easily pushed from the shorter side edge of the desired slot and fix with a suitable adhesive, so that a non-positive and positive , creep-resistant connection is given.
- the adhesive serves primarily to avoid that a creepage path can form over the slot.
- the longer side edge of the insulation basic module is not just provided with a Kriechwegverdorfrnden barrier.
- the holder is angled and thereby each a shorter side edge and an opposite longer side edge are formed.
- the longer side edge accordingly has a longer creepage path anyway than the shorter side edge, so that for the longer side edge an extension of the creepage path through a transverse thereto arranged insulation plate is not necessarily necessary. Nevertheless, it makes sense to completely circulate the respective slot also over the longer side edge of the insulation basic module and to lengthen the creepage distance at the longer side edge to a certain extent by means of this slot area that is not mechanically required.
- the insulation base module is at least partially tapered from its central region, starting at least at one of its two ends towards its width. Due to the taper, the holder can advantageously be reduced in the distance between its two ends. In the installed state of the holder, this distance is decisive for the lowest possible width, for example, a discharge dome. In the lower part of the then horizontally extending middle region is thickened. This has mainly reasons of stability that the holder, which is typically installed in such a horizontal position, is thereby enhanced to remove increased vertical forces at its two outer ends.
- the holder according to the invention whose receiving device comprises an element with the shape of an inverse circle segment.
- the radius of this circle segment depends mainly on the radius of the shield tube or the barrier system, which is to be kept in the installed state of the holder. Typical radii are for example between 12cm and 35cm.
- the receiving device is in the simplest case as a milled extension of the insulation basic module to manufacture. For mechanical reasons, in the installed state of the holder, the circular segment should be open upwards, so that there is a stable balance of a screen tube carried there.
- the receiving device comprises at least one belt-like holding element with which a screen tube can be fixed in the inverse circular segment.
- a belt or belt-like band encompasses a large part of the circumference of the screen tube and thereby exerts a fixing force in the direction of the circular segment.
- the belt engages on its other side, for example, an axis-like cross member, which is connected to the insulation base module.
- the belt is tensioned.
- a belt-like holding device arranged on both sides of, for example, a 8 cm thick insulation base module is structurally simple to manufacture and reduces any torsion moments on the axis-like transverse strut then guided by the insulation base module.
- the Belt tensioned by a corresponding length-adjustable device is structurally simple to manufacture and reduces any torsion moments on the axis-like transverse strut then guided by the insulation base module.
- the two connecting devices are formed by a respective angled end of the holder and designed such that opposing parallel oppositely facing contact surfaces are formed.
- the parallel contact surfaces are suitable to be connected directly or indirectly to walls of an oil boiler, for example with opposite walls of a discharge dome. This may for example have a rectangular plan, but also a round. Accordingly, additional spacing or matching elements between walls and contact surfaces of the holder may be required.
- the parallel contact surfaces can also be connected to other structural parts of the boiler or the active part made of metal or insulating material in the same way.
- each of the two contact surfaces has at least one oblong hole bore open at one of its ends.
- Such elongated holes allow namely the simple insertion of the bridge-like holder on bolt-like and connected to the walls holding elements, so that the assembly of a holder according to the invention is particularly simplified in an oil boiler.
- the holder according to the invention is at least partially made of milled Presspan.
- the insulation base module according to the invention is plate-like and therefore also good to manufacture from a plate of appropriate thickness, in which case milling is particularly suitable and flexible processing.
- a suitable plate thickness is 5cm to 10cm, with the slots milled to a depth of 1cm to 2cm, for example.
- pressboard is in itself a proven insulating material For use in oil-filled components, but of course other insulation materials are conceivable.
- the object of the invention is also achieved by an oil transformer with oil boiler and arranged in this high-voltage discharge with a shield tube, wherein the shield tube is at least partially held by at least one holder according to one of claims 1 to 14.
- the advantages of the invention correspond to those already mentioned for the holder benefits.
- the diameter of a discharge dome can be advantageously reduced.
- the holder is connected at its two ends directly or indirectly with a respective Kesselwandungsabisme a Austechnischtechnischsdomes. This can be done for example by means of retaining bolts, optionally also intermediate or matching elements between the holder and wall sections can be provided.
- Fig. 1 shows an exemplary first holder 10, which is formed symmetrically to a symmetry axis 34.
- a U-shaped isolation base module 12 forms the base component of the holder monolithically milled in this case 10.
- Center is an upwardly directed inverse circular segment 32 is provided as a receiving device for a screen tube of the same diameter to be held.
- the U-like basic shape of the holder 10 is formed by respective opposing angled portions 28, 30, which are provided on both sides of the axis of symmetry 34.
- Two further Anwinkelung 26 are provided on both sides of the axis of symmetry, so that the holder extends in this section approximately radially in the direction of the center of the inverse circle segment.
- the lower region of the U-shape is formed by two module insulation sections 36 provided on either side below the inverse circular segment 32, which each comprise two angled sections 26, 28.
- a plurality of adjacent circumferential slots 38, 40 are provided in the module insulation portion 36. These act on the one hand to lengthen the creepage distance and thus increase the insulating capacity of the holder 10. On the other hand, they also offer the option of inserting optional U-shaped insulation plates on top. These act - apart from their respective open side - also extending the creepage distance and can be arranged according to individual constraints as needed.
- the open side of a U-shaped insulation plate is preferably to be arranged on the respective longer side edge of the holder, because this side edge has a longer creepage distance and is less critical from the field strength load than the shorter side edge.
- the holder 10 has a tapered width and no circumferential slots in its two upper side regions compared to the horizontally extending middle region located in the illustration below. Due to the taper, the holder can advantageously be reduced in the distance between its two ends 22, 24. In the installed state of the holder 10, this distance is decisive for the lowest possible width, for example, a discharge dome. In the lower part of the then horizontally extending middle region is thickened. This has mainly reasons of stability, since the holder 10, which is typically installed in such a horizontal position is thereby improved, to an increased extent to remove vertical forces at its two outer ends 22, 24, for example weight forces of carrying pipes to be carried.
- the holder connecting devices 14 are formed, which form opposing contact surfaces 16. These are preferably intended to be connected to respective wall sections of an oil boiler, for example a discharge dome. But they can also be connected to other construction elements of the boiler or the active part made of metal or insulating material.
- the connecting devices 14 have perpendicular to their contact surfaces 16 respective open oblong holes 18, 20.
- the holder 10 can be easily pushed over respective bolts, which protrude from a respective wall section. Subsequently, such a connection is to be fixed, for example with a fixation cap, not shown in this figure.
- Fig. 2 shows a in the Fig. 1 shown holder comparable exemplary second holder 50 in a three-dimensional representation.
- a front surface outside 52 and two side edges 54, 56 are visible.
- Circumferentially around these sides or edges a plurality of adjacently arranged slots 62 are provided.
- Fixing caps 58 are provided on the bilateral connection devices, which prevent the holder 50 held by the fixing screws 60 from slipping.
- an inverse circular segment 70 is formed for receiving a screen tube.
- the screen tube clamping belts 68, 70 are provided on both sides of the holder, which can be tensioned by means of a transverse clamping bolt 66. This is namely radially movable and lockable to the center of the inverse circle segment.
- a shield tube is easily inserted into the holder 50 and then fixed by means of, for example, a cotton belt 68, 70.
- Fig. 3 shows an exemplary third holder 104 in a discharge dome in a representation 80.
- a U-shaped holder 104 is fastened by means of a plurality of fixing screws 90.
- the distance between the boiler wall sections is indicated by the reference numeral 86 and is for example 1m, 1.2m or 1.5m.
- fixing caps 88 are arranged over the respective molded connection devices.
- U-shaped insulation plates 94, 96 are inserted, which further locally increase the insulating capability of the holder 104.
- an inverse circular segment 92 is provided, in which a screen tube 100 is fixed with radius adapted thereto.
- the shield tube 100 is fixed by a tensioning belt 102, which is held by a transverse clamping bolt, which in turn by means of a clamping screw 98 in the radial direction to the center of the inverse circle segment 92 is movable and fixable.
- Fig. 4 shows a third U-shaped insulation plate 114 on a insulation base module in a view 110.
- the open end is located in the region of the longer side edge of the insulation base module, which is indicated in this case with a cross section with the reference number 112.
- all slots of the insulation base module are so pronounced that an insulation plate 114 can be pushed and glued into each circumferential slot.
- Fig. 5 shows an exemplary fixation cap in a three-dimensional representation 120. This is intended to be attached via a connecting device at one end of a holder according to the invention, so as to prevent lateral moving out of the holder of respective retaining bolts or fixing screws.
- the fixing cap itself has in this example two holes 122, by which it can be fastened with screws or the like.
- Fig. 6 shows an exemplary open slot 134 in a contact surface 132 of a connector.
- Such a bore allows easy lateral insertion or hooking of a holder according to the invention provided for fixing screws or fixing nuts or bolts.
- Fig. 7 shows an exemplary nut 140 with a threaded hole 144 in a top view 142 and in a side view 146.
- a nut is made of an insulating material such as pressboard while avoiding sharp-edged areas.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
- Insulating Of Coils (AREA)
- Thermal Insulation (AREA)
Abstract
Description
Die Erfindung betrifft einen Halter für Hochspannungsausleitungen in Öltransformatoren, mit einem plattenähnlichen, zwei flächige Außenseiten und Seitenkanten aufweisenden, länglichen Isolationsgrundmodul, welches an seinen beiden Enden eine jeweilige Verbindungsvorrichtung und im seinem mittleren Bereich eine Aufnahmevorrichtung für ein quer verlaufendes Schirmrohr aufweist. Die Erfindung betrifft auch einen Öltransformator mit Ölkessel und einer darin angeordneten Hochspannungsausleitung mit einem Schirmrohr.The invention relates to a holder for high-voltage discharges in oil transformers, having a plate-like, two-dimensional outer sides and side edges, elongated insulation base module having at its two ends a respective connection device and in its central region a receiving device for a transverse screen tube. The invention also relates to an oil transformer with oil boiler and a high-voltage discharge arranged therein with a shield tube.
Es ist allgemein bekannt, dass Transformatoren mit einer Nennleistung von beispielsweise 100MVA und höher bei einer Nennspannung von 110kV und höher, beispielsweise 800kV, üblicherweise als Öltransformatoren ausgeführt werden, welche ein Gewicht von 200t und höher aufweise. Hierbei ist der aktive Teil des Transformators mit Eisenkern und Wicklungen innerhalb eines mit Öl gefüllten Transformatorkessels angeordnet, wobei das Öl sowohl der elektrischen Isolation als auch der verbesserten Kühlung dient. Die elektrische Verbindung der jeweiligen Anschlüsse des Aktivteils des Transformators mit den Ausleitungsisolatoren an der Außenseite des Ölkessels erfolgt hierbei durch elektrische Leiter, welche bei hohen Spannungen von einem auf gleichem Potential liegenden, isolierten Schirmrohr umgeben sind, dessen Isolation entweder aus massiven Isolierstoffen oder von einem Barrierensystem gebildet wird. Das Barrieresystem ist dabei radialsymmetrisch um den betreffenden Leiter aufgebaut und umfasst ein elektrisch leitfähiges Schirmrohr mit bedarfsweise mehreren verschachtelt beabstandeten Isolationsbarrieren. Die für jeden einzelnen Leiter notwendigen Barrieresysteme werden innerhalb des ölgefüllten Transformatorkessel durch einen zwischen Transformator und Kesselwandung gebildeten Zwischenraum geführt, wobei jedoch isolationstechnisch bedingte Mindestabstände einzuhalten sind.It is well known that transformers having a rated power of, for example, 100MVA and higher at a rated voltage of 110kV and higher, for example, 800kV, are usually designed as oil transformers having a weight of 200t and above. In this case, the active part of the transformer with iron core and windings is arranged inside a transformer vessel filled with oil, the oil serving both the electrical insulation and the improved cooling. The electrical connection of the respective terminals of the active part of the transformer with the Ausleitungsisolatoren on the outside of the oil boiler takes place here by electrical conductors which are surrounded at high voltages by a lying at the same potential, insulated shield tube, the isolation of either solid insulating materials or of a barrier system is formed. The barrier system is constructed radially symmetrical about the relevant conductor and comprises an electrically conductive shielding tube as needed a plurality of nested spaced isolation barriers. The barrier systems required for each individual conductor are guided inside the oil-filled transformer tank by means of a gap formed between the transformer and the boiler wall, whereby, however, minimum separation distances must be maintained.
Aus Gründen der mechanischen Stabilität und Kurzschlussfestigkeit sind die isolierten Schirmrohre in bestimmten Abständen abzustützen beziehungsweise zu halten, also mechanisch entweder mit der Außenwand des Kessels oder einem geeigneten Bereich des Transformators zu verbinden. Hierzu werden sogenannte Halter verwendet, welche als Isolatoren auszuführen sind. Die Isolationsfähigkeit eines Halters als solchen ist bei identischer Isolationsstrecke geringer als die Isolationsfähigkeit von reinem Öl.For reasons of mechanical stability and short-circuit resistance, the insulated shield tubes are to be supported or held at specific intervals, ie mechanically connected either to the outer wall of the boiler or to a suitable area of the transformer. For this purpose, so-called holders are used, which are to be designed as insulators. As such, the insulation capability of a holder is less than the isolation capability of pure oil with an identical isolation distance.
Nachteilig ist jedoch, dass insbesondere bei Höchstspannungen von 380kV und verstärkt im Bereich von 800kV und höher aufgrund unzureichender Isolationsfähigkeit der Halter die Ausleitungsdome des jeweiligen Kessels mit einem deutlich höherem Durchmesser ausgeführt werden müssen, als zur Isolation der eigentlichen Ausleitung erforderlich ist. So ist beispielsweise ein Domdurchmesser von 0,8m für 380kV bei 800kV nicht mehr ausreichend, und es sind weit höhere Durchmesser von beispielsweise 1,5m erforderlich.A disadvantage, however, is that especially at high voltages of 380kV and reinforced in the range of 800kV and higher due to insufficient insulation capacity of the holder Ausleitungsdome the respective boiler must be performed with a much larger diameter than is required for the isolation of the actual discharge. For example, a dome diameter of 0.8m is no longer sufficient for 380kV at 800kV, and much larger diameters, say 1.5m, are required.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, einen Halter für Hochspannungsausleitungen in Öltransformatoren bereitzustellen, welcher sich durch eine besonders hohe Isolationsfähigkeit auszeichnet.Based on this prior art, it is an object of the invention to provide a holder for high-voltage discharges in oil transformers, which is characterized by a particularly high isolation capability.
Diese Aufgabe wird gelöst durch einen Halter der eingangs genannten Art. Dieser ist dadurch gekennzeichnet, dass das Isolationsgrundmodul längs seiner Erstreckung zwischen erstem und zweitem Ende mehrfach angewinkelt ist, so dass dadurch eine Kriechwegverlängerung bewirkt ist, und dass quer zur länglichen Erstreckung des Isolationsgrundmoduls mehrere benachbarte, dieses an dessen flächigen Außenseiten und dessen Seitenkanten in einer jeweiligen Ebene umlaufende Schlitze vorgesehen sind.This object is achieved by a holder of the aforementioned type. This is characterized in that the insulation base module is bent several times along its extension between the first and second ends, thereby causing a Kriechwegverlängerung, and that transverse to the elongated extension of the insulation basic module more adjacent , Which are provided on the flat outer sides and the side edges in a respective plane circumferential slots.
Die Grundidee der Erfindung besteht darin, den Halter als Brücke auszuführen, wobei durch die Anwinkelungen die effektive Isolationslänge erhöht wird und somit auch der Kriechweg längs der Erstreckung des brückenähnlichen Halters zwischen seinen beiden üblicherweise auf Erdpotential befindlichen äußeren Enden und der auf Hochspannungspotential befindlichen mittigen Aufnahmevorrichtung für das Schirmrohr. Ein derartiger Halter ist typischerweise als Abstandhalter und nicht zur Abtragung des kompletten Gewichtes des Ausleitungsrohres ausgelegt. Die Abtragung des Gewichtes erfolgt vorzugsweise durch Stützelemente mit vertikaler Ausrichtung, welche typischer Weise auch länger ausgeführt sein können, ohne dass ein Platzproblem innerhalb des Ölkessels auftritt. Ein erfindungsgemäßer Halter ist dann typischer Weise horizontal angeordnet. Auf diese Weise ist es möglich, bedarfsweise auch eine Vielzahl an Anwinkelungen längs der Erstreckung des brückenähnlichen Halters vorzusehen, welche einerseits dessen Isolationsfähigkeit erhöhen aber andererseits - je nach Ausführungsform - gegebenenfalls dessen Eignung zur Abtragung des Gewichtes reduzieren. Da eine Abtragung des Gewichtes der Ausleitung aber vorzugsweise über eine Stütze erfolgt und diese idealerweise in einem Bereich des Transformatorkessels angebracht ist, welcher in vertikaler Richtung nach unten hin genügend Raumangebot aufweist, ist dies jedoch unkritisch. Als zusätzliche die Spannungsfestigkeit erhöhende Maßnahme sind erfindungsgemäß mehrere benachbarte, dieses an dessen flächigen Außenseiten und dessen Seitenkanten in einer jeweiligen Ebene umlaufende Schlitze vorgesehen.The basic idea of the invention is to carry out the holder as a bridge, whereby the effective length of insulation is increased by the angulations and thus also the creepage distance along the extent of the bridge-like holder between its two outer ends which are usually at ground potential and the central holding device for high voltage potential for the shield tube. Such a holder is typically designed as a spacer and not for the removal of the entire weight of the diversion tube. The removal of the weight is preferably carried out by support members with vertical orientation, which typically can be made longer, without a space problem occurs within the oil boiler. An inventive holder is then typically arranged horizontally. In this way, it is possible, if necessary, to provide a plurality of angling along the extension of the bridge-like holder, which on the one hand increase its insulating ability but on the other hand - depending on the embodiment - possibly reduce its suitability for removal of the weight. Since a removal of the weight of the discharge but preferably via a support and this is ideally mounted in a region of the transformer tank, which has sufficient space in the vertical direction downwards, this is not critical. As an additional measure increasing the dielectric strength, a plurality of adjacent slots are provided according to the invention, these slots being provided on its flat outer sides and its lateral edges in a respective plane.
Ein erfindungsgemäßer Schlitz im Halter beziehungsweise des Isolationsgrundmoduls umläuft dieses an wenigstens drei Seiten des Querschnittes in einer Ebene, nämlich längs der beiden flächigen Außenseiten und quasi als dazwischen liegender Verbindungsschlitz quer über wenigstens eine Seitenkante. Die Schlitze tragen somit ebenfalls zu einer verbesserten Isolation bei. Als Ausgangsmaterial für einen derartigen brückenähnlichen Halter bietet sich ein leicht bearbeitbares Material wie beispielsweise Pressspan an. Durch den Einsatz moderner Frästechnologien lässt sich aus einem monolitischen Pressspanblock eine nahezu beliebige Formenvielfalt für die Anwinkelungen fräsen, beispielsweise ein U-Form oder auch eine Mäanderform. Ebenso lassen sich die zuvor genannten Schlitze auf einfache Weise einfräsen.An inventive slot in the holder or the insulation base module rotates around this at least three sides of the cross section in a plane, namely along the two flat outer sides and quasi as intermediate connecting slot across at least one side edge. The slots thus also contribute to improved insulation. As a starting material for such a bridge-like holder offers an easily editable material such as press chip. Through the use of modern milling technologies, a monolithic press chip block can be used to mill almost any variety of shapes for the angling, for example a U-shape or even a meandering shape. Likewise, the aforementioned slots can be cut in a simple manner.
Somit ist ein brückenähnlicher Halter für Ausleitungsrohre, insbesondere für deren Anordnung in Ausleitungsdomen eines Transformatorkessels, geschaffen, durch welche das jeweilige Ausleitungsrohr hochspannungstechnisch und mechanisch sicher von den Kesselwandungen beabstandbar ist, ohne dass der Abstand zwischen Ausleitungsrohr und Kesselwandung Weise erhöht werden muss. Es ist aber auch ebenso möglich, den Halter zwischen einem Aktivteil des Transformators, beispielsweise seinem Kern, und einer benachbarten Kesselwandung anzuordnen. In diesem Fall ist der Halter gegebenenfalls so auszuführen, dass er zur Abtragung des Gewichtes des Ausleitungsrohres geeignet ist.Thus, a bridge-like holder for Ausleitungsrohre, in particular for their arrangement in Ausleitungsdomen a transformer tank, created by which the respective discharge pipe high voltage technology and mechanically safe from the boiler walls is spaced without the distance between the discharge pipe and boiler wall way must be increased. But it is also possible to arrange the holder between an active part of the transformer, for example, its core, and an adjacent boiler wall. In this case, the holder may need to be designed so that it is suitable for removing the weight of the discharge pipe.
Entsprechend einer bevorzugten Ausführungsform des erfindungsgemäßen Halters ist dieser beiderseits der Aufnahmevorrichtung symmetrisch ausgeführt. Dies bedingt ein symmetrisches Isolationsverhalten beiderseits der Isolationsvorrichtung, wodurch letztendlich die Länge der Brücke möglichst kurz gehalten werden kann. In ebenfalls bevorzugter Ausgestaltungsform weist der erfindungsgemäße Halter längs seiner Erstreckung beiderseits der Aufnahmevorrichtung jeweils wenigstens zwei gegenläufig ausgeprägte Anwinkelungen auf. Diese sind bedarfsweise sigmoidähnlich ausgeführt und vermeiden somit scharfe Kanten. Gegenläufige Anwinkelungen heben sich längs der Erstreckung des Halters in etwa gegenseitig auf, so dass ein beispielsweise waagerechter Verlauf eines Haltersegmentes nach zwei gegenläufigen Anwinkelungen wieder waagerecht verläuft. Somit lässt sich beispielsweise eine U-ähnliche Grundform eines brückenähnlichen Haltermoduls realisieren. Aber auch andere den Kriechweg verlängernde Grundformen wie Mäander oder auch eine Zickzack-Form sind damit realisierbar. Generell sind ist jede den Kriechweg verlängernde Grundform wie beispielsweise auch eine korkenzieherähnliche Spirale geeignet.According to a preferred embodiment of the holder according to the invention this is carried out symmetrically on both sides of the receiving device. This requires a symmetrical isolation behavior on both sides of the isolation device, whereby ultimately the length of the bridge can be kept as short as possible. In a likewise preferred embodiment, the holder according to the invention has at least two oppositely directed angling along its extent on both sides of the receiving device. These are executed as needed sigmoid similar and thus avoid sharp edges. Opposing Anwinkelungen cancel each other along the extension of the holder in about each other, so that, for example, a horizontal course of a holder segment after two opposite Anwinkelungen runs horizontally again. Thus, for example, a U-like basic shape of a bridge-like holder module can be realized. But also other basic forms that extend the creepage path, such as meanders or even a zigzag shape, can be realized. In general, every creep path extending basic shape such as a corkscrew-like spiral is suitable.
Entsprechend einer weiteren Ausführungsform des erfindungsgemäßen Halters ist wenigstens eine U-förmige Isolationsplatte in einen der Schlitze formschlüssig eingepasst, gegebenenfalls auch verklebt. Eine derartige Isolationsplatte weist beispielsweise eine Dicke von 3mm auf und wirkt ebenfalls den Kriechweg verlängernd. Durch die optionale Anordnung einer solchen Isolationsplatte ist es möglich, einen standardisierten brückenähnlichen Halter für eine bestimmte Spannungsebene, beispielsweise mit einer Spannweite von 1,2m für 800kV, bereitzustellen und je nach individuellen Feldstärkeverhältnissen im Ölkessel bedarfsweise in kritischen Bereichen individuell eine Erhöhung der Spannungsfestigkeit des Halters herbeizuführen. Die U-förmige Isolationsplatte ist mit ihrem offenen Ende abgewandt von der bezüglich der Feldstärke kritischeren Seite des Halters einzupassen, weil diese an ihrem offenen Ende nicht zur Erhöhung der Spannungsfestigkeit beiträgt.According to a further embodiment of the holder according to the invention at least one U-shaped insulation plate is fitted in one of the slots form-fitting, optionally also glued. Such an insulating plate has, for example, a thickness of 3 mm and also acts to elongate the creepage distance. The optional arrangement of such an insulating plate, it is possible to provide a standardized bridge-like holder for a certain voltage level, for example, with a span of 1.2m for 800kV, and depending on individual field strength ratios in the oil boiler, if necessary, in critical areas individually to bring about an increase in the dielectric strength of the holder. The U-shaped insulation plate is facing away from the more critical with respect to the field strength side of the holder with its open end to fit because it does not contribute to increase the dielectric strength at its open end.
Gemäß einer weiteren Ausgestaltungsform des erfindungsgemäßen Halters ist aufgrund der Anwinkelungen zumindest ein Modulisolationsabschnitt mit einer kürzeren und eine gegenüberliegenden längeren Seitenkante gebildet, wobei in diesem Bereich zumindest einer der umlaufenden Schlitze vorgesehen ist und wobei zumindest eine U-förmige Isolationsplatte in zumindest einen umlaufenden Schlitz im Modulisolationsabschnitt eingepasst ist.According to a further embodiment of the holder according to the invention, at least one module insulation section is formed with a shorter and an opposite longer side edge due to the Anwinkelungen, wherein at least one of the circumferential slots is provided in this area and wherein at least one U-shaped insulation plate in at least one circumferential slot in the module insulation section is fitted.
Ein erfindungsgemäßer Schlitz im Halter umläuft diesen an wenigstens drei Seiten des Querschnittes in einer Ebene, nämlich längs der beiden flächigen Außenseiten und quasi als dazwischen liegender Verbindungsschlitz quer über die kürzere Seitenkante. Eine dazu passende U-förmige Isolationsplatte, deren Plattendicke demgemäß knapp der Dicke des teilweise umlaufenden Schlitzes entspricht, beispielsweise 5mm, lässt sich leicht von der kürzeren Seitenkante aus auf den gewünschten Schlitz schieben und mit einem geeigneten Kleber fixieren, so dass eine kraft- und formschlüssige, kriechwegfeste Verbindung gegeben ist. Der Kleber dient hierbei primär der Vermeidung, dass sich ein Kriechweg über den Schlitz ausbilden kann. Durch die für diese besonders einfache Handhabungsweise jedoch erforderliche Aussparung in der Isolationsplatte ist die längere Seitenkante des Isolationsgrundmoduls jedoch gerade nicht mit einer kriechwegverlängernden Barriere versehen.An inventive slot in the holder runs around this on at least three sides of the cross section in a plane, namely along the two flat outer sides and quasi as an intermediate connecting slot across the shorter side edge. A matching U-shaped insulation plate whose plate thickness accordingly corresponds to just the thickness of the partially circumferential slot, for example 5mm, can be easily pushed from the shorter side edge of the desired slot and fix with a suitable adhesive, so that a non-positive and positive , creep-resistant connection is given. The adhesive serves primarily to avoid that a creepage path can form over the slot. However, by the required for this particularly simple way of handling recess in the insulation plate, the longer side edge of the insulation basic module is not just provided with a Kriechwegverlängernden barrier.
Dies wird jedoch dadurch kompensiert, dass der Halter angewinkelt ist und dadurch jeweils eine kürzere Seitenkante und eine gegenüber liegende längere Seitenkante gebildet sind. Die längere Seitenkante weist demgemäß ohnehin einen längeren Kriechweg auf als die kürzere Seitenkante, so dass für die längere Seitenkante eine Verlängerung des Kriechwegs durch eine quer dazu angeordnete Isolationsplatte nicht zwangsweise nötig ist. Dennoch ist es sinnvoll, den jeweiligen Schlitz komplett auch über die längere Seitenkante des Isolationsgrundmoduls umlaufen zu lassen und durch diesen mechanisch nicht benötigten Schlitzbereich zumindest den Kriechweg an der längeren Seitenkante in einem gewissen Umfang zu verlängern.However, this is compensated by the fact that the holder is angled and thereby each a shorter side edge and an opposite longer side edge are formed. The longer side edge accordingly has a longer creepage path anyway than the shorter side edge, so that for the longer side edge an extension of the creepage path through a transverse thereto arranged insulation plate is not necessarily necessary. Nevertheless, it makes sense to completely circulate the respective slot also over the longer side edge of the insulation basic module and to lengthen the creepage distance at the longer side edge to a certain extent by means of this slot area that is not mechanically required.
Entsprechend einer weiteren Ausgestaltungsform des erfindungsgemäßen Halters ist das Isolationsgrundmodul zumindest abschnittsweise von seinem mittleren Bereich ausgehend zu wenigstens einem seiner beiden Enden hin in seiner Breite verjüngt. Durch die Verjüngung lässt sich der Halter in dem Abstand zwischen seinen beiden Enden vorteilhaft reduzieren. In eingebautem Zustand des Halters ist dieser Abstand maßgeblich für die möglichst gering zu haltende Breite beispielsweise eines Ausleitungsdomes. Im unteren Bereich ist der dann waagrecht verlaufende Mittelbereich verdickt. Dies hat überwiegend Stabilitätsgründe, dass der Halter, welcher typischerweise in einer solchen waagerechten Position eingebaut ist, dadurch ertüchtigt wird, in erhöhtem Maße vertikale Kräfte an seine beiden äußeren Enden abzutragen.According to a further embodiment of the holder according to the invention, the insulation base module is at least partially tapered from its central region, starting at least at one of its two ends towards its width. Due to the taper, the holder can advantageously be reduced in the distance between its two ends. In the installed state of the holder, this distance is decisive for the lowest possible width, for example, a discharge dome. In the lower part of the then horizontally extending middle region is thickened. This has mainly reasons of stability that the holder, which is typically installed in such a horizontal position, is thereby enhanced to remove increased vertical forces at its two outer ends.
Gemäß einer besonders bevorzugten Ausgestaltungsform des erfindungsgemäßen Halters umfasst dessen Aufnahmevorrichtung ein Element mit der Form eines inversen Kreissegmentes. Der Radius dieses Kreissegmentes richtet sich überwiegend nach dem Radius des Schirmrohres oder der des Barrieresystems, welches in eingebautem Zustand von dem Halter zu halten ist. Typische Radien liegen beispielsweise zwischen 12cm und 35cm. Die Aufnahmevorrichtung ist im einfachsten Fall als gefräster Fortsatz des Isolationsgrundmoduls zu fertigen. Aus mechanischen Gründen sollte im eingebauten Zustand des Halters das Kreissegment nach oben geöffnet sein, so dass sich ein stabiles Gleichgewicht eines dort getragenen Schirmrohres ergibt.According to a particularly preferred embodiment of the holder according to the invention whose receiving device comprises an element with the shape of an inverse circle segment. The radius of this circle segment depends mainly on the radius of the shield tube or the barrier system, which is to be kept in the installed state of the holder. Typical radii are for example between 12cm and 35cm. The receiving device is in the simplest case as a milled extension of the insulation basic module to manufacture. For mechanical reasons, in the installed state of the holder, the circular segment should be open upwards, so that there is a stable balance of a screen tube carried there.
Gemäß einer besonderen Ausgestaltungsform des erfindungsgemäßen Halters umfasst die Aufnahmevorrichtung wenigstens ein riemenartiges Halteelement, mit welcher ein Schirmrohr in dem inversen Kreissegment fixierbar ist. Hierbei umgreift ein Riemen oder riemenähnliches Band einen Großteil des Umfangs des Schirmrohres und übt dabei eine Fixierkraft in Richtung des Kreissegmentes aus. Entsprechend umgreift der Riemen an seiner anderen Seite beispielsweise eine achsenähnliche Querstrebe, welche mit dem Isolationsgrundmodul verbunden ist. Hierdurch wird der Riemen gespannt. Eine beidseitig des beispielsweise 8cm dicken Isolationsgrundmoduls angeordnete riemenartige Haltevorrichtung ist konstruktiv einfach zu fertigen und reduziert eventuelle Torsionsmomente auf die dann durch das Isolationsgrundmodul geführte achsenähnliche Querstrebe. In besonders vorteilhafter Weise ist der Riemen durch eine entsprechende längenverstellbare Vorrichtung spannbar. Dies ermöglicht eine besonders einfache Montage eines Schirmrohres und seine anschließende Fixierung.According to a particular embodiment of the holder according to the invention, the receiving device comprises at least one belt-like holding element with which a screen tube can be fixed in the inverse circular segment. Here, a belt or belt-like band encompasses a large part of the circumference of the screen tube and thereby exerts a fixing force in the direction of the circular segment. Accordingly, the belt engages on its other side, for example, an axis-like cross member, which is connected to the insulation base module. As a result, the belt is tensioned. A belt-like holding device arranged on both sides of, for example, a 8 cm thick insulation base module is structurally simple to manufacture and reduces any torsion moments on the axis-like transverse strut then guided by the insulation base module. In a particularly advantageous manner is the Belt tensioned by a corresponding length-adjustable device. This allows a particularly simple installation of a screen tube and its subsequent fixation.
Einer weiteren Variante des erfindungsgemäßen Halters folgend sind die beiden Verbindungsvorrichtungen durch ein jeweils angewinkeltes Ende des Halters gebildet und derart ausgestaltet, dass gegenüber liegende parallele voneinander abgewandte Kontaktflächen gebildet sind. Die parallelen Kontaktflächen eignen sich, direkt oder indirekt mit Wandungen eines Ölkessels verbunden zu werden, beispielsweise mit gegenüber liegenden Wandungen eines Ausleitungsdomes. Dieser kann beispielsweise einen rechteckförmigen Grundriss aufweisen, aber auch einen runden. Dementsprechend können zusätzliche Abstands- oder Anpasselemente zwischen Wandungen und Kontaktflächen des Halters erforderlich sein. Die parallelen Kontaktflächen können aber auch mit anderen Konstruktionsteilen des Kessels oder des Aktivteils aus Metall oder Isolierstoff in der gleichen Weise verbunden werden.Following a further variant of the holder according to the invention, the two connecting devices are formed by a respective angled end of the holder and designed such that opposing parallel oppositely facing contact surfaces are formed. The parallel contact surfaces are suitable to be connected directly or indirectly to walls of an oil boiler, for example with opposite walls of a discharge dome. This may for example have a rectangular plan, but also a round. Accordingly, additional spacing or matching elements between walls and contact surfaces of the holder may be required. The parallel contact surfaces can also be connected to other structural parts of the boiler or the active part made of metal or insulating material in the same way.
In bevorzugter Weise weist jede der beiden Kontaktflächen wenigstens eine an einem ihrer Enden offene Langlochbohrung auf. Derartige Langlochbohrungen ermöglichen nämlich das einfache Einschieben des brückenähnlichen Halters über bolzenähnliche und mit den Wandungen verbundenen Halteelemente, so dass die Montage eines erfindungsgemäßen Halters in einen Ölkessel besonders vereinfacht ist.In a preferred manner, each of the two contact surfaces has at least one oblong hole bore open at one of its ends. Such elongated holes allow namely the simple insertion of the bridge-like holder on bolt-like and connected to the walls holding elements, so that the assembly of a holder according to the invention is particularly simplified in an oil boiler.
In bevorzugter Weise ist der erfindungsgemäße Halter zumindest teilweise aus gefrästem Presspan gefertigt. Dies betrifft insbesondere das Isolationsgrundmodul und die U-förmigen Isolationsplatten. Das Isolationsgrundmodul ist erfindungsgemäß plattenähnlich und daher auch gut aus einer Platte entsprechender Dicke zu fertigen, wobei hier Fräsen besonders geeigneter und flexibeler Bearbeitungsweg ist. Eine geeignete Plattendicke beträgt beispielsweise 5cm bis 10cm, wobei die Schlitze beispielsweise mit einer Tiefe von 1cm bis 2cm einzufräsen sind. Hierdurch wird eine isolationstechnisch und mechanisch besonders günstige Verbindung mit den U-förmigen Isolationsplatten ermöglicht. Auch diese müssen zur Gewährleistung der Steckbarkeit eine plattenähnliche Struktur von einigen Millimetern Dicke aufweisen. Unabhängig von der Art der Verarbeitung ist Pressspan an sich ein bewährter Isolationswerkstoff zum Einsatz in ölgefüllten Komponenten, selbstverständlich sind aber auch andere Isolationsmaterialien denkbar.Preferably, the holder according to the invention is at least partially made of milled Presspan. This concerns in particular the insulation base module and the U-shaped insulation plates. The insulation base module according to the invention is plate-like and therefore also good to manufacture from a plate of appropriate thickness, in which case milling is particularly suitable and flexible processing. For example, a suitable plate thickness is 5cm to 10cm, with the slots milled to a depth of 1cm to 2cm, for example. As a result, an insulation technology and mechanically particularly favorable connection with the U-shaped insulation plates is made possible. These must have a plate-like structure of several millimeters thickness to ensure pluggability. Regardless of the type of processing, pressboard is in itself a proven insulating material For use in oil-filled components, but of course other insulation materials are conceivable.
Die erfindungsgemäße Aufgabe wird auch gelöst durch einen Öltransformator mit Ölkessel und einer in diesem angeordneten Hochspannungsausleitung mit einem Schirmrohr, wobei das Schirmrohr zumindest abschnittsweise von wenigstens einem Halter nach einem der Ansprüche 1 bis 14 gehalten ist. Die erfindungsgemäßen Vorteile entsprechen denen bereits für den Halter genannten Vorteilen. So kann insbesondere der Durchmesser eines Ausleitungsdomes in vorteilhafter Weise reduziert werden. Gemäß einer weiteren Ausgestaltungsvariante ist der Halter an seinen beiden Enden direkt oder indirekt mit einem jeweiligen Kesselwandungsabschnitt eines Ausleitungsdomes verbunden. Dies kann beispielsweise mittels Haltebolzen geschehen, wobei optional auch Zwischen- oder Anpasselemente zwischen Halter und Wandungsabschnitten vorgesehen sein können.The object of the invention is also achieved by an oil transformer with oil boiler and arranged in this high-voltage discharge with a shield tube, wherein the shield tube is at least partially held by at least one holder according to one of claims 1 to 14. The advantages of the invention correspond to those already mentioned for the holder benefits. In particular, the diameter of a discharge dome can be advantageously reduced. According to a further embodiment variant of the holder is connected at its two ends directly or indirectly with a respective Kesselwandungsabschnitt a Ausleitungsdomes. This can be done for example by means of retaining bolts, optionally also intermediate or matching elements between the holder and wall sections can be provided.
Weitere vorteilhafte Ausgestaltungsmöglichkeiten sind den weiteren abhängigen Ansprüchen zu entnehmen.Further advantageous embodiment possibilities can be found in the further dependent claims.
Anhand der in den Zeichnungen dargestellten Ausführungsbeispiele sollen die Erfindung, weitere Ausführungsformen und weitere Vorteile näher beschrieben werden.Reference to the embodiments illustrated in the drawings, the invention, further embodiments and other advantages will be described in detail.
Es zeigen:
- Fig. 1
- einen exemplarischen ersten Halter,
- Fig. 2
- einen exemplarischen zweiten Halter,
- Fig. 3
- einen exemplarischen dritten Halter in einem Ausleitungsdom,
- Fig. 4
- eine exemplarische U-förmige Isolationsplatte auf einem Haltersegment,
- Fig. 5
- eine exemplarische Fixierkappe,
- Fig. 6
- eine exemplarische Langlochbohrung in einer Kontaktfläche sowie
- Fig. 7
- eine exemplarische Mutter.
- Fig. 1
- an exemplary first holder,
- Fig. 2
- an exemplary second holder,
- Fig. 3
- an exemplary third holder in a discharge dome,
- Fig. 4
- an exemplary U-shaped isolation plate on a holder segment,
- Fig. 5
- an exemplary fixation cap,
- Fig. 6
- an exemplary elongated hole in a contact surface as well
- Fig. 7
- an exemplary mother.
Im Modulisolationsabschnitt 36 sind mehrere benachbarte umlaufende Schlitze 38, 40 vorgesehen. Diese wirken einerseits den Kriechweg verlängernd und damit die Isolationsfähigkeit des Halters 10 steigernd. Andererseits bieten diese aber auch die Möglichkeit, optional U-förmige Isolationsplatten darauf einzuschieben. Diese wirken - abgesehen von ihrer jeweils offenen Seite - ebenfalls den Kriechweg verlängernd und können je nach individuellen Randbedingungen bedarfsweise angeordnet werden. Die offene Seite einer U-förmigen Isolationsplatte ist dabei vorzugsweise an der jeweils längeren Seitenkante des Halters anzuordnen, weil diese Seitenkante einen längeren Kriechweg aufweist und von der Feldstärkenbelastbarkeit her unkritischer ist als die kürzere Seitenkante.In the
Der Halter 10 weist in seinen beiden oberen Seitenbereichen eine gegenüber dem in der Darstellung unten befindlichen, waagerecht verlaufenden Mittelbereich eine verjüngte Breite sowie keine umlaufenden Schlitze auf. Durch die Verjüngung lässt sich der Halter in dem Abstand zwischen seinen beiden Enden 22, 24 vorteilhaft reduzieren. In eingebautem Zustand des Halters 10 ist dieser Abstand maßgeblich für die möglichst gering zu haltende Breite beispielsweise eines Ausleitungsdomes. Im unteren Bereich ist der dann waagrecht verlaufende Mittelbereich verdickt. Dies hat überwiegend Stabilitätsgründe, da der Halter 10, welcher typischerweise in einer solchen waagerechten Position eingebaut ist, dadurch ertüchtigt wird, in erhöhtem Maße vertikale Kräfte an seine beiden äußeren Enden 22, 24 abzutragen, beispielsweise Gewichtskräfte von zu tragenden Ausleitungsrohren.The
An den beiden Enden 22, 24 des Halters sind Verbindungsvorrichtungen 14 angeformt, welche einander gegenüber liegende Kontaktflächen 16 bilden. Diese sind vorzugsweise dafür vorgesehen, mit jeweiligen Wandungsabschnitten eines Ölkessels, beispielsweise eines Ausleitungsdoms, verbunden zu werden. Sie können aber auch mit anderen Konstruktionselementen des Kessels oder des Aktivteils aus Metall oder Isolierstoff verbunden werden. Zum Zwecke der Verbindung weisen die Verbindungsvorrichtungen 14 senkrecht zu ihren Kontaktflächen 16 jeweilige offene Langlochbohrungen 18, 20 auf. Somit lässt sich der Halter 10 auf einfache Weise über jeweilige Bolzen schieben, welche aus einem jeweiligen Wandungsabschnitt ragen. Anschließend ist eine derartige Verbindung zu fixieren, beispielsweise mit einer in dieser Fig. nicht gezeigten Fixierkappe.At the two ends 22, 24 of the
- 1010
- exemplarischer erster Halterexemplary first holder
- 1212
- IsolationsgrundmodulIsolation basic module
- 1414
- Verbindungsvorrichtungconnecting device
- 1616
- Kontaktfläche von VerbindungselementContact surface of connecting element
- 1818
- erste offene Langlochbohrungfirst open slot hole
- 2020
- zweite offene Langlochbohrungsecond open slot hole
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- erstes Ende von erstem Halterfirst end of first holder
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- zweites Ende von erstem Haltersecond end of first holder
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- erste Anwinkelung von erstem Halterfirst angling of the first holder
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- zweite Anwinkelung von erstem Haltersecond angling of the first holder
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- dritte Anwinkelung von erstem Halterthird angling of first holder
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- inverses Kreissegment von erstem Halterinverse circle segment of first holder
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- Symmetrieachseaxis of symmetry
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- Modulisolationsabschnitt mit längerer und kürzerer SeitenkanteModulisolationsabschnitt with longer and shorter side edge
- 3838
- erster Schlitz von erstem Halterfirst slot of first holder
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- zweiter Schlitz von erstem Haltersecond slot of first holder
- 5050
- exemplarischer zweiter Halterexemplary second holder
- 5252
- flächige Außenseite von zweitem Halterflat outside of second holder
- 5454
- erste Seitenkante von zweitem Halterfirst side edge of second holder
- 5656
- zweite Seitenkante von zweitem Haltersecond side edge of second holder
- 5858
- Fixierkappe von zweitem HalterFixing cap of second holder
- 6060
- Fixierschraubefixing screw
- 6262
- erster Schlitz von zweitem Halterfirst slot of second holder
- 6464
- inverses Kreissegment von zweitem Halterinverse circle segment of second holder
- 6666
- Spannbolzen von zweitem HalterClamping bolt from second holder
- 6868
- erster Spannriemen von zweitem Halterfirst tensioning strap from second holder
- 7070
- zweiter Spannriemen von zweitem Haltersecond tensioning strap from second holder
- 8080
- exemplarischer dritter Halter in AusleitungsdomExemplary third holder in discharge dome
- 8282
- erster Kesselwandungsabschnittfirst boiler wall section
- 8484
- zweiter Kesselwandungsabschnittsecond boiler wall section
- 8686
- Breite von AusleitungsdomWidth of diversion dome
- 8888
- Fixierkappe von drittem HalterFixation cap from third holder
- 9090
- Fixierschraubefixing screw
- 9292
- inverses Kreissegment von drittem Halterinverse circle segment of third holder
- 9494
- erste U-förmige Isolationsplattefirst U-shaped insulation plate
- 9696
- zweite U-förmige Isolationsplattesecond U-shaped insulation plate
- 9898
- Spannschraube von drittem HalterTightening screw from third holder
- 100100
- Schirmrohrscreen tube
- 102102
- Spannriemen von drittem HalterTensioning belt from third holder
- 104104
- dritter Halterthird holder
- 110110
- exemplarische U-förmige Isolationsplatte auf Haltersegmentexemplary U-shaped isolation plate on holder segment
- 112112
- Querschnitt durch HaltersegmentCross section through holder segment
- 114114
- exemplarische U-förmige Isolationsplatteexemplary U-shaped insulation plate
- 116116
- Aussparungrecess
- 120120
- exemplarische Fixierkappeexemplary fixation cap
- 122122
- Bohrungdrilling
- 130130
- exemplarische Langlochbohrung in Kontaktflächeexemplary long hole in contact area
- 132132
- Kontaktflächecontact area
- 134134
- exemplarische Langlochbohrungexemplary long hole drilling
- 140140
- exemplarische Mutterexemplary mother
- 142142
- exemplarische Mutter in Draufsichtexemplary mother in top view
- 144144
- Gewindebohrungthreaded hole
- 146146
- exemplarische Mutter in Seitenansichtexemplary mother in side view
Claims (15)
dass das Isolationsgrundmodul (12) längs seiner Erstreckung zwischen erstem (22) und zweitem (24) Ende mehrfach angewinkelt (26, 28, 30) ist, so dass dadurch eine Kriechwegverlängerung bewirkt ist, und dass quer zur länglichen Erstreckung des Isolationsgrundmoduls (12) mehrere benachbarte, dieses an dessen flächigen Außenseiten (52) und dessen Seitenkanten (54, 56) in einer jeweiligen Ebene umlaufende Schlitze (38, 40, 62) vorgesehen sind.Holders (10, 50, 104) for high voltage discharge in (oil transformers, with a plate-like, two-dimensional outer sides (52) and side edges (54, 56), elongated insulation base module (12) having at its two ends (22, 24) a respective connecting device (14) and in its central region a receiving device for a transverse screen tube (100), characterized
in that the insulating base module (12) is repeatedly angled (26, 28, 30) along its extension between the first (22) and second (24) ends, thereby causing a creepage path extension, and that transversely to the elongated extent of the insulation basic module (12). a plurality of adjacent, this on its flat outer sides (52) and its side edges (54, 56) in a respective plane encircling slots (38, 40, 62) are provided.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12002296.7A EP2485224B1 (en) | 2012-03-29 | 2012-03-29 | Holder for high voltage leading out lines in oil transformers |
ES12002296.7T ES2621270T3 (en) | 2012-03-29 | 2012-03-29 | Support for high voltage discharge lines in oil transformers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12002296.7A EP2485224B1 (en) | 2012-03-29 | 2012-03-29 | Holder for high voltage leading out lines in oil transformers |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2485224A2 true EP2485224A2 (en) | 2012-08-08 |
EP2485224A3 EP2485224A3 (en) | 2012-09-12 |
EP2485224B1 EP2485224B1 (en) | 2017-01-04 |
Family
ID=46149098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12002296.7A Active EP2485224B1 (en) | 2012-03-29 | 2012-03-29 | Holder for high voltage leading out lines in oil transformers |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2485224B1 (en) |
ES (1) | ES2621270T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109473250A (en) * | 2018-12-22 | 2019-03-15 | 泰州市天力铁芯制造有限公司 | A kind of insulation board of electrical transformer cores |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58132909A (en) * | 1982-02-03 | 1983-08-08 | Hitachi Ltd | Connecting device for stationary induction electric apparatus |
JPH03151608A (en) * | 1989-11-09 | 1991-06-27 | Toshiba Corp | Lead wire supporting equipment |
JPH0567887A (en) * | 1991-09-05 | 1993-03-19 | Sony Corp | High-tension cable holder |
JPH09246062A (en) * | 1996-03-07 | 1997-09-19 | Meidensha Corp | Lead holding device for transformer |
JPH1154338A (en) * | 1997-07-31 | 1999-02-26 | Meidensha Corp | Transformer |
CA2437554A1 (en) * | 2001-02-05 | 2002-08-15 | Ehv-Weidmann Industries Inc. | Modular transformer lead support system |
EP2445071B1 (en) * | 2010-10-15 | 2014-01-01 | ABB Technology AG | Holder for high voltage tubular leadthroughs in oil transformers |
-
2012
- 2012-03-29 EP EP12002296.7A patent/EP2485224B1/en active Active
- 2012-03-29 ES ES12002296.7T patent/ES2621270T3/en active Active
Non-Patent Citations (1)
Title |
---|
None |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109473250A (en) * | 2018-12-22 | 2019-03-15 | 泰州市天力铁芯制造有限公司 | A kind of insulation board of electrical transformer cores |
Also Published As
Publication number | Publication date |
---|---|
ES2621270T3 (en) | 2017-07-03 |
EP2485224A3 (en) | 2012-09-12 |
EP2485224B1 (en) | 2017-01-04 |
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