EP0283897B1 - Supporting insulator - Google Patents
Supporting insulator Download PDFInfo
- Publication number
- EP0283897B1 EP0283897B1 EP88104038A EP88104038A EP0283897B1 EP 0283897 B1 EP0283897 B1 EP 0283897B1 EP 88104038 A EP88104038 A EP 88104038A EP 88104038 A EP88104038 A EP 88104038A EP 0283897 B1 EP0283897 B1 EP 0283897B1
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- EP
- European Patent Office
- Prior art keywords
- post insulator
- insulator
- insulator according
- foot part
- equipment
- 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.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/30—Sealing
- H01B17/301—Sealing of insulators to support
Definitions
- the invention relates to a post insulator, in particular for pluggable connection to transformers and encapsulated switchgear, with a rotationally symmetrical, hollow insulating body for the central reception of the conductor, which has two areas made of different materials which are firmly connected to one another.
- Such a post insulator is known from the prospectus of the company Elastimold with the title "Transitional Supports Series 200", the post insulator consisting essentially of casting resin from top to bottom and containing a plastic insert made of EPDM in the area of the device bushing.
- the weakly elastic EPDM insert does not have any expansion space, as is required on the one hand for assembly for bushings with different dimensions with a usual tolerance of a few tenths of a millimeter and on the other hand for reasons of thermal expansion.
- the invention is therefore based on the object to avoid the disadvantages described and to use a more elastic material that enables a secure seal, regardless of the usual tolerance mentioned above, and in the area of the foot part or the attachment in its elasticity and expansion not by void-free, the elastic material rigidly surrounding support form is hindered.
- a post insulator of the type mentioned in that the support part or trunk of the post insulator consists of rigid material and its device-side foot part made of elastic material which surrounds the connector part of the device bushing with radial bias dust and waterproof and in the area of the electrical contacting contains a field control electrode integrated all around in the foot part.
- the foot part normally ends in the area between the top edge of the device feedthrough and the nearest screen of the trunk. If the support insulator should not have any screens or plates, it applies accordingly that the elastic foot part ends a little above the device bushing and merges into the rigid part.
- the interface between rigid and elastic material should run approximately perpendicular to the field lines, which generally results in an angle ⁇ of 30 to 60 ° to the isolator axis.
- the circumferential interface can also have a curved profile instead of a straight one.
- the foot part including the integrated field control electrode, is preferably made of silicone rubber and the remaining part of the post insulator is made of cast resin.
- a shoulder that runs all around in the area of the rigid part with an elevation or edge is highly recommended. This can be done by holding devices that can be fastened on the device bushing overlapped and pressed in the direction of the device bushing for fastening. At least two opposing organs or claws are necessary, better three.
- a complete circumferential retaining ring with the above-mentioned edge overlapping molding is used, which consists of two half-shells. In the area of the joints to be connected, these have form-fitting connecting members and are preferably designed as a sliding fold that can be actuated in the axial direction.
- an all-round retaining ring If an all-round retaining ring is used, it should be at a sufficient distance from the insulating body with respect to its inner diameter so that cavities are present for a certain necessary expansion volume of the foot part. As a rule, a distance of approx. 1 mm is sufficient.
- FIG. 1 shows the vertical mounting of a post insulator with the actual support part 10 consisting of rigid material, in particular cast resin, to which plates or screens 14 are molded in the case shown.
- the cast-on foot part 11 made of elastic silicone rubber adjoins at the bottom.
- the boundary surface 12 and thus the upper end of the foot part 11 is arranged in the region which lies between the upper edge of the connecting part 22 of the device bushing 20 and the lowermost screen 14.
- the post insulator has a continuous conductor pin 15, preferably made of copper, with an upper power connection thread 15c, a tapered plug contact part 15a for receiving in a corresponding blind hole in the device bushing 20 and with a support edge 15b which is important for assembly and which leads onto the connection upper edge 24 of the connection part 22 the device bushing 20 comes to rest after assembly.
- the field control electrode 16 is shaped in such a way that it covers the electrically critical area from the point at which the conductor bolt 15 emerges from the insulator to over the edge of the connection part 22 of the device bushing 20 and thus homogenizes the electrical field. It is also advantageous to pull the elastic material on the outer surface of the rigid part 10 above the interface 12 up to approximately the circumferential fastening shoulder or its outer edge 18. The same applies to the outer conductive layer 17, which extends all around the entire height of the elastic foot part 11.
- the vertical assembly as shown in Figure 1, is particularly common. However, it is also possible, for example, to mount it horizontally. Then, however, it is advisable to use a retaining ring 30 which surrounds the entire foot part 11 in a cylindrical manner and to provide this with a circumferential fastening flange 32 which is attached to the bushing several times by means of the usual fastening members 34, 35, 36 is attached.
- An expansion gap 19 should be provided between the foot part 11 and the retaining ring 30 in order to be able to take up space required due to thermal expansion or dimensional tolerances.
- the procedure for assembly is as follows: First, the post insulator including plug contact 15a is applied to the connecting part 22 of the device bushing 20. The two half-shells of the retaining ring 30 are then placed around the elastic foot part 11 from two sides. In the case of the preferably used sliding fold in the axial direction, a free space of approximately 10 to 15 mm is necessary in order to bring the two half-shells, which were initially joined together with an axial displacement, into their flush locking position. This must be taken into account with regard to the distance to the lowest screen 14. The molding 31 of the retaining ring now engages over the outer circumferential edge 18 of the rigid support part 10. Now the fastening members are connected to one another.
- the lock nuts 36 are pressed along the threaded rods 34 suspended in the fastening lugs 26 onto the fastening flange 32 of the metal retaining ring 30 until the contact edge 15b of the conductor bolt 15 rests on the upper connection edge 24 of the device bushing 20.
- the lower edge of the retaining ring 30 and that of the elastic foot part then lie almost without play on the flange of the device bushing 20.
- the retaining ring with all-round mounting flange 32 is a preferred embodiment. It is also possible to form individual fastening lugs on the retaining ring 30 instead of the fastening flange, as shown in the left part of FIG. 1. In the left part of the figure, as an alternative to the cast-in fastening lugs 26, cast-in threaded bushes with screwed-in threaded rods are shown. Finally, instead of a circumferential retaining ring 30, individual claws can also be used, which engage in the outer circumferential fastening edge 18 of the circumferential shoulder.
- FIG. 2 shows a detail that fully corresponds to the embodiment according to FIG. 1
- an embodiment variant is shown in the case of FIG.
- a connection ring 38 is embedded all around, which has holding elements on the outside for fastening the support insulator, preferably a thread 39 - as shown.
- the retaining ring 40 has a corresponding internal thread at its upper end and can otherwise be designed essentially as the part 30 shown in FIG. 1 and described there. The use of half-shells is omitted here. Instead, the post insulator 10 is screwed into the part 40 designed as a closed ring.
- an all-round further field control electrode 37 is shown in FIG. It serves to compensate for the electrical field in the area of the edges 38a of the integrated connection ring 38.
- a correspondingly rotating field control electrode can be recommended in the area of the edge 31 (cf. FIG. 2).
Landscapes
- Insulators (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
Description
Die Erfindung betrifft einen Stützisolator, insbesondere zum steckbaren Anschluß an Transformatoren und gekapselte Schaltanlagen, mit einem rotationssymmetrischen, hohlen Isolierkörper zur zentrischen Aufnahme des Leiters, der zwei miteinander fest verbundene Bereiche aus unterschiedlichem Material aufweist.The invention relates to a post insulator, in particular for pluggable connection to transformers and encapsulated switchgear, with a rotationally symmetrical, hollow insulating body for the central reception of the conductor, which has two areas made of different materials which are firmly connected to one another.
Ein solcher Stützisolator ist aus dem Prospekt der Firma Elastimold mit dem Titel "Übergangsstützer Serie 200" bekannt geworden, wobei der Stützisolator im wesentlichen von oben bis unten durchgehend aus Gießharz besteht und im Bereich der Gerätedurchführung eine Kunststoffeinlage aus EPDM enthält. Bei dieser Ausführung hat jedoch die schwach elastische EPDM-Einlage keinen Ausdehnungsraum, wie er einerseits für die Montage für Durchführungen mit unterschiedlichen Abmessungen bei einer üblichen Toleranz von einigen zehntel Millimeter und andererseits aus Gründen der Wärmedehnung erforderlich ist.Such a post insulator is known from the prospectus of the company Elastimold with the title "Transitional Supports Series 200", the post insulator consisting essentially of casting resin from top to bottom and containing a plastic insert made of EPDM in the area of the device bushing. In this version, however, the weakly elastic EPDM insert does not have any expansion space, as is required on the one hand for assembly for bushings with different dimensions with a usual tolerance of a few tenths of a millimeter and on the other hand for reasons of thermal expansion.
Der Erfindung liegt daher die Aufgabe zugrunde, die geschilderten Nachteile zu vermeiden und ein stärker elastisches Material zu verwenden, das eine sichere Abdichtung ermöglicht, ungeachtet der vorgenannten üblichen Toleranz, und im Bereich des Fußteils bzw. der Befestigung in seiner Elastizität und Ausdehnung nicht durch eine hohlraumfrei, das elastische Material starr umgebende Stützerform behindert ist.The invention is therefore based on the object to avoid the disadvantages described and to use a more elastic material that enables a secure seal, regardless of the usual tolerance mentioned above, and in the area of the foot part or the attachment in its elasticity and expansion not by void-free, the elastic material rigidly surrounding support form is hindered.
Diese Aufgabe ist gemäß der Erfindung bei einem Stützisolator der eingangs genannten Art dadurch gelöst, daß der Stützerteil bzw. Strunk des Stützisolators aus starrem Material und sein geräteseitig angeordnetes Fußteil aus elastischem Material besteht, das das Anschlußteil der Gerätedurchführung mit radialer Vorspannung staub- und wasserdicht umgibt und im Bereich der elektrischen Kontaktierung eine ringsumlaufend in das Fußteil integrierte Feldsteuerelektrode enthält.This object is achieved according to the invention in a post insulator of the type mentioned in that the support part or trunk of the post insulator consists of rigid material and its device-side foot part made of elastic material which surrounds the connector part of the device bushing with radial bias dust and waterproof and in the area of the electrical contacting contains a field control electrode integrated all around in the foot part.
Das Fußteil endet normalerweise in dem zwischen der Anschlußoberkante der Gerätedurchführung und dem gerätenächsten Schirm des Strunks gelegenen Bereich. Falls der Stützisolator keine Schirme bzw. Teller aufweisen sollte, so gilt sinngemäß, daß das elastische Fußteil wenig oberhalb der Gerätedurchführung endet und in den starren Teil übergeht.The foot part normally ends in the area between the top edge of the device feedthrough and the nearest screen of the trunk. If the support insulator should not have any screens or plates, it applies accordingly that the elastic foot part ends a little above the device bushing and merges into the rigid part.
Die Grenzfläche zwischen starrem und elastischem Material soll etwa senkrecht zu den Feldlinien verlaufen, was in der Regel einen Winkel α von 30 bis 60° zur Isolatorachse ergibt. Dabei kann die ringsumlaufende Grenzfläche anstelle eines geraden auch ein gekrümmtes Profil aufweisen.The interface between rigid and elastic material should run approximately perpendicular to the field lines, which generally results in an angle α of 30 to 60 ° to the isolator axis. The circumferential interface can also have a curved profile instead of a straight one.
Bevorzugt besteht das Fußteil samt integrierter Feldsteuerelektrode aus Silikonkautschuk und das übrige Teil des Stützisolators aus Gießharz. Zur Befestigung des Stützisolators auf der Gerätedurchführung ist eine im Bereich des starren Teiles ringsumlaufende Schulter mit einer Erhöhung bzw. Kante sehr empfehlenswert. Diese kann von gerätedurchführungsseitig befestigbaren Halteorganen übergriffen und in Richtung Gerätedurchführung gedrückt werden zur Befestigung. Dabei sind mindestens zwei sich gegenüberliegende Organe bzw. Krallen notwendig, besser drei. Bei einer bevorzugten Ausführungsform wird ein kompletter ringsumlaufender Haltering mit die vorgenannte Kante übergreifender Anformung benutzt, der aus zwei Halbschalen besteht. Diese weisen im Bereich der zu verbindenden Fugen formschlüssige Verbindungsorgane auf und sind bevorzugt als in axialer Richtigung betätigbarer Verschiebefalz ausgebildet.The foot part, including the integrated field control electrode, is preferably made of silicone rubber and the remaining part of the post insulator is made of cast resin. To attach the support insulator to the device feedthrough, a shoulder that runs all around in the area of the rigid part with an elevation or edge is highly recommended. This can be done by holding devices that can be fastened on the device bushing overlapped and pressed in the direction of the device bushing for fastening. At least two opposing organs or claws are necessary, better three. In a preferred embodiment, a complete circumferential retaining ring with the above-mentioned edge overlapping molding is used, which consists of two half-shells. In the area of the joints to be connected, these have form-fitting connecting members and are preferably designed as a sliding fold that can be actuated in the axial direction.
Weitere bevorzugte Ausführungsformen sind in Unteransprüchen gekennzeichnet.Further preferred embodiments are characterized in the subclaims.
Sofern ein ringsumlaufender Haltering benutzt wird, sollte dieser bezüglich seines Inndendurchmessers einen ausreichenden Abstand zum Isolierkörper aufweisen, damit Hohlräume vorhanden sind für ein gewisses notwendiges Ausdehnungsvolumen des Fußteiles. In der Regel genügt hierfür ein Abstand von ca. 1 mm.If an all-round retaining ring is used, it should be at a sufficient distance from the insulating body with respect to its inner diameter so that cavities are present for a certain necessary expansion volume of the foot part. As a rule, a distance of approx. 1 mm is sufficient.
Gemäß der vorbeschriebenen Erfindung ist es nun möglich, Stützisolatoren staub- und wasserdicht sowie elektrisch sicher ohne Montageprobleme auf übliche Gerätedurchführungen, insbesondere solchen mit Steck- oder Schraubtechnik, aufzubringen. Infolge des vermittels des Stützisolators gewonnenen Abstandes vom geerdeten Anlagengehäuse ist es möglich, den Stromanschluß mittels blanker Leiter oder mittels einfacher, nicht gekapselter Kabelendverschlüsse zu bewerkstelligen.According to the invention described above, it is now possible to apply support insulators in a dustproof, watertight and electrically safe manner to conventional device bushings, in particular those with plug-in or screw technology, without assembly problems. As a result of the distance from the grounded system housing obtained by means of the support insulator, it is possible to implement the power connection by means of bare conductors or by means of simple, non-encapsulated cable terminations.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispieles näher erläutert, aus dem sich weitere Merkmale und Vorteile der Erfindung ergeben.The invention is explained in more detail below with the aid of an exemplary embodiment from which further features and advantages of the invention result.
In der zugehörigen Zeichnung zeigt
- Fig. 1
- eine Gesamtansicht eines auf eine Gerätedurchführung montierten Stützisolators, wobei die rechte Bildhälfte als Längsschnitt dargestellt ist;
- Fig. 2
- einen Ausschnitt aus Fig.1, dieselbe Ausführungsform betreffend;
- Fig. 3
- einen Ausschnitt gemäß Fig. 2, jedoch eine alternative Befestigungsart betreffend.
- Fig. 1
- an overall view of a mounted on a device bushing insulator, the right half of the picture is shown as a longitudinal section;
- Fig. 2
- a section of Figure 1, regarding the same embodiment;
- Fig. 3
- a section of FIG. 2, but an alternative type of attachment.
Im einzelnen zeigt Figur 1 die senkrechte Montage eines Stützisolators mit dem aus starrem Material, insbesondere Gießharz bestehenden eigentlichen Stützerteil 10, an das im dargestellten Falle Teller bzw. Schirme 14 angeformt sind. Nach unten schließt sich das angegossene Fußteil 11 aus elastischem Silikonkautschuk an. Die Grenzfläche 12 von elastischem und starrem Material verläuft im Falle der Darstellung etwa unter α = 45° schräg von innen nach außen unten, und zwar vorteilhafterweise etwa parallel zur entsprechend konisch umlaufenden oberen Begrenzungsfläche der Feldsteuerelektrode 16. Wie ersichtlich, ist die Grenzfläche 12 und damit das obere Ende des Fußteiles 11 in dem Bereich angeordnet, der zwischen der Oberkante des Anschlußteiles 22 der Gerätedurchführung 20 liegt und dem untersten Schirm 14.1 shows the vertical mounting of a post insulator with the
Der Stützisolator weist einen durchgehenden Leiterbolzen 15, vorzugsweise aus Kupfer, auf mit einem oberen Stromanschlußgewinde 15c, einem verjüngten Steckkontaktteil 15a zur Aufnahme in einer entsprechenden Sackbohrung der Gerätedurchführung 20 und mit einer für die Montage wichtigen Auflagekante 15b, die auf die Anschlußoberkante 24 des Anschlußteiles 22 der Gerätedurchführung 20 nach Montage zu liegen kommt.The post insulator has a
Die Feldsteuerelektrode 16 ist so geformt, daß sie den elektrisch kritischen Bereich ab Austreten des Leiterbolzens 15 aus dem Isolator bis über die Kante des Anschlußteiles 22 der Gerätedurchführung 20 abdeckt und damit das elektrische Feld homogenisiert. Vorteilhaft ist es auch, das elastische Material an der Außenfläche des starren Teiles 10 oberhalb der Grenzfläche 12 noch etwa bis zur umlaufenden Befestigungsschulter bzw. deren äußeren Kante 18 hochzuziehen. Dasselbe gilt für die äußere Leitschicht 17, die sich über die ganze Höhe des elastischen Fußteiles 11 zylindrisch ringsumlaufend erstreckt.The
Die senkrechte Montage, wie sie in der Figur 1 dargestellt ist, ist besonders häufig. Es ist aber beispielsweise auch eine Montage in der Waagrechten möglich. Dann empfiehlt es sich allerdings, einen zylindrisch das gesamte Fußteil 11 umgebenden Haltering 30 zu verwenden und diesen mit einem umlaufenden Befestigungsflansch 32 zu versehen, der mehrfach mittels der üblichen Befestigungsorgane 34, 35, 36 an der Durchführung befestigt wird. Zwischen Fußteil 11 und Haltering 30 sollte ein Dehnungsspalt 19 vorgesehen sein, um durch Wärmedehnung oder Maßtoleranzen bedingten Raumbedarf aufnehmen zu können.The vertical assembly, as shown in Figure 1, is particularly common. However, it is also possible, for example, to mount it horizontally. Then, however, it is advisable to use a
Im einzelnen wird bei der Montage wie folgt vorgegangen: Zunächst wird der Stützisolator samt Steckkontakt 15a auf das Anschlußteil 22 der Gerätedurchführung 20 aufgebracht. Sodann werden von zwei Seiten her die beiden Halbschalen des Halteringes 30 um das elastische Fußteil 11 gelegt. Dabei ist im Falle des bevorzugt benutzten Verschiebefalzes in axialer Richtung ein Freiraum von etwa 10 bis 15 mm notwendig, um die zunächst mit axialer Verschiebung aneinander gefügten beiden Halbschalen in ihre bündige Verrastungsstellung zu bringen. Dies ist bezüglich des Abstandes zum untersten Schirm 14 zu berücksichtigen. Dabei greift nun die Anformung 31 des Haltringes über die äußere umlaufende Kante 18 des starren Stützerteiles 10. Nun werden die Befestigungsorgane miteinander verbunden. Dabei werden die Gegenmuttern 36 entlang der in die Befestigungsfahnen 26 eingehängten Gewindestangen 34 auf den Befestigungsflansch 32 des metallenen Halteringes 30 gepreßt, bis die Auflagekante 15b des Leiterbolzens 15 auf der Anschlußoberkante 24 der Gerätedurchführung 20 aufliegt. Bei entsprechend genauer Bemessung liegt dann auch die Unterkante des Halteringes 30 und die des elastischen Fußteils nahezu spielfrei auf dem Flansch der Gerätedurchführung 20 auf.The procedure for assembly is as follows: First, the post insulator including
Der Haltering mit ringsumlaufendem Befestigungsflansch 32 ist eine bevorzugte Ausführungsform. Ebenso ist es möglich, statt des Befestigungsflansches einzelne Befestigungsnasen am Haltering 30 anzuformen, wie im linken Teil der Figur 1 gezeigt. Im linken Bildteil sind alternativ zu den eingegossenen Befestigungsfahnen 26 eingegossene Gewindebuchsen mit eingeschraubten Gewindestangen gezeigt. Schließlich können statt eines umlaufenden Halteringes 30 auch einzelne Klauen benutzt werden, die in die äußere umlaufende Befestigungskante 18 der umlaufenden Schulter eingreifen.The retaining ring with all-
Während Figur 2 ein Detail zeigt, das mit der Ausführungsform gemäß Figur 1 voll übereinstimmt, ist im Falle der Figur 3 eine Ausführungsvariante dargestellt. Hier ist in das starre Teil 10 ringsumlaufend ein Anschlußring 38 eingebettet, das außenseitig Halteorgane zur Befestigung des Stützisolators aufweist, bevorzugt ein Gewinde 39 - wie dargestellt. Der Haltering 40 weist an seinem oberen Ende ein entsprechendes Innengewinde auf und kann ansonsten im wesentlichen so gestaltet sein, wie das aus Figur 1 ersichtliche und dort beschriebene Teil 30. Die Verwendung von Halbschalen entfällt hier. Stattdessen wird der Stützisolator 10 in das als geschlossenen Ring ausgebildete Teil 40 eingeschraubt.While FIG. 2 shows a detail that fully corresponds to the embodiment according to FIG. 1, an embodiment variant is shown in the case of FIG. Here, in the
Weiterhin ist in Figur 3 eine ringsumlaufende weitere Feldsteuerelektrode 37 gezeigt. Sie dient dem Ausgleich des elektrischen Feldes im Bereich der Kanten 38a des integrierten Anschlußringes 38. Eine entsprechend umlaufende Feldsteuerelektrode kann sich im Bereich der Kante 31 (vgl. Figur 2) empfehlen.Furthermore, an all-round further
- 1010th
- Stützerteil bzw. Strunk (starres Material)Support part or trunk (rigid material)
- 1111
- Elastisches Fußteil des StützisolatorsElastic foot part of the support insulator
- 1212
- Grenzfläche von elastischem zu starrem MaterialInterface from elastic to rigid material
- 1414
- Schirm bzw. TellerUmbrella or plate
- 1515
- LeiterbolzenLadder pin
- 15a15a
- Steckkontakt des LeiterbolzensPlug contact of the conductor pin
- 15b15b
- AuflagekanteContact edge
- 15c15c
- Stromanschlußgewinde des LeiterbolzensPower connection thread of the conductor bolt
- 1616
- FeldsteuerelektrodeField control electrode
- 1717th
- Äußere Leitschicht des FußteilsOuter conductive layer of the foot section
- 1818th
- Äußere umlaufende Kante der Schulter des StützersOuter circumferential edge of the shoulder of the supporter
- 1919th
- DehnungsspaltExpansion gap
- 2020th
- GerätedurchführungDevice implementation
- 2222
- Anschlußteil der GerätedurchführungConnection part of the device bushing
- 2424th
- AnschlußoberkanteTop edge
- 2626
- Befestigungsfahne, eingegossen in GerätedurchführungFastening flag, cast into the device bushing
- 2828
- GerätewandDevice wall
- 3030th
- Haltering bzw. HalbschalenRetaining ring or half shells
- 3131
- Anformung des HalteringsForming of the retaining ring
- 3232
- Befestigungsflansch bzw. Befestigungsnase des HalteringsFastening flange or fastening lug of the retaining ring
- 3434
- GewindestangeThreaded rod
- 3535
- BefestigungsschraubeMounting screw
- 3636
- GegenmutterLock nut
- 3737
- Weitere FeldsteuerelektrodeAdditional field control electrode
- 3838
- AnschlußringConnecting ring
- 38a38a
- Kante des AnschlußringesEdge of the connection ring
- 3939
- SchraubgewindeScrew thread
- 4040
- SchraubringScrew ring
Claims (13)
- Post insulator, particularly for connection to transformers and encapsulated switchplants, comprising a rotationally symmetric, hollow insulating body (10, 11) for central accommodation of the conductor (15), which insulating body (10, 11) exhibits two areas of different material, permanently joined to one another, characterised in that the insulator part or core (10) of the post insulator consists of rigid material and its foot part (11) arranged on the equipment side consists of elastic material which surrounds the terminal part (22) of the equipment bushing (20) with radial pre-tension in a dust- and watertight manner and contains in the area of the electrical contact arrangement a field control electrode (16) which is circularly peripherally integrated into the foot part (11) on the inside.
- Post insulator according to Claim 1, characterised in that the foot part (11) ends in the area located between the terminal top edge (24) of the equipment bushing (20) and the shield (14) of the core (10) next to the equipment.
- Post insulator according to Claim 1 or 2, characterised in that the boundary face (12) between the rigid and elastic material extends approximately perpendicularly to the field lines, preferably at an angle a of 30 to 60°, with respect to the insulator axis.
- Post insulator according to one of the preceding claims, characterised in that the foot part (11) consists of silicone rubber.
- Post insulator according to Claim 4, characterised in that the insulator part or core (10) essentially consists of cast resin and the foot part (11) is moulded on from silicone rubber without cavities.
- Post insulator according to Claim 5, characterised in that the field control electrode (16) consists of elastic, conductive silicone rubber.
- Post insulator according to one of the preceding claims, characterised in that the foot part (11) has a conductive outer layer (17) for homogenising the electrical field.
- Post insulator according to one of the preceding claims, characterised in that the axial height of the cross-sectional expansions of the foot part (11), dimensioned in adaptation to conventional equipment bushings, is in each case dimensioned in such a manner that the support edge (15b) of the conductor bolt (15), after exertion of a certain pressure of the elastic foot part (11) in the direction of the equipment terminal by means of the mounting elements (34, 35, 36), comes to lie on the corresponding terminal top edge (24) of the equipment bushing (20) and is durably held in this position.
- Post insulator according to one of the preceding claims, characterised in that in the vicinity of the boundary face (12), the insulator part or core (10), consisting of rigid material, of the insulator body exhibits a circularly peripheral shoulder with a raised portion or edge (18), peripheral on the outside, which can be engaged by holding elements, which can be mounted on the equipment bushing side, and can be pressed in the direction of the equipment bushing (20).
- Post insulator according to one of the preceding claims, characterised by a preferably metallic holding ring (30) which can be mounted on the equipment bushing side and which consists of two half shells which can be locked to one another by axial displacement, and exhibits a moulding (31) engaging over the peripheral edge (18) of the insulator (10).
- Post insulator according to one of the preceding claims, characterised by a terminal ring (38), which is embedded circularly peripherally in the vicinity of the boundary face (12) in the insulator part or core (10) of the insulating body and exhibits holding elements for mounting the post insulator.
- Post insulator according to Claim 11, characterised in that the metallic terminal ring (38) exhibits a protruding outer area which is provided with a thread (39).
- Post insulator according to one of Claims 9 to 12, characterised in that a further circularly peripheral field control electrode (37) is embedded in the insulator part or core (10) in the area of the metallic edges (18, 38a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88104038T ATE90810T1 (en) | 1987-03-26 | 1988-03-15 | SUPPORT INSULATOR. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873709947 DE3709947A1 (en) | 1987-03-26 | 1987-03-26 | SUPPORT INSULATOR |
| DE3709947 | 1987-03-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0283897A2 EP0283897A2 (en) | 1988-09-28 |
| EP0283897A3 EP0283897A3 (en) | 1990-10-24 |
| EP0283897B1 true EP0283897B1 (en) | 1993-06-16 |
Family
ID=6324026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88104038A Expired - Lifetime EP0283897B1 (en) | 1987-03-26 | 1988-03-15 | Supporting insulator |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0283897B1 (en) |
| AT (1) | ATE90810T1 (en) |
| DE (2) | DE3709947A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2013254A1 (en) * | 1990-03-13 | 1991-09-13 | William R. Rueth, Jr. | High-voltage outdoor electrical bushing |
| DE10037328A1 (en) * | 1999-09-21 | 2001-05-17 | Kg Ritz Messwandler G M B H & | Device for taking high-voltage conductors through three-dimensional bodies comprises a closure element and a base element with at least one cavity for accommodation of secondary elements |
| AU782978B2 (en) * | 2000-08-16 | 2005-09-15 | Wamco Pacific Pty. Ltd. | Electrical insulator |
| WO2012168142A1 (en) * | 2011-06-09 | 2012-12-13 | Abb Technology Ag | Strengthening element for a mounting flange of a hollow cylindrical insulator housing |
| CN104332308B (en) * | 2012-03-31 | 2017-06-20 | 指明集团有限公司 | The less power capacitor of operation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2630470A (en) * | 1948-02-17 | 1953-03-03 | Cornell Dubilier Electric | Capacitator terminal bushing with auxiliary sealing ring |
| US2868866A (en) * | 1955-08-04 | 1959-01-13 | Raytheon Mfg Co | Lead-in bushings |
| US3278883A (en) * | 1965-03-17 | 1966-10-11 | Gen Electric | Combined gasket and grounding device for bushings |
-
1987
- 1987-03-26 DE DE19873709947 patent/DE3709947A1/en not_active Withdrawn
-
1988
- 1988-03-15 DE DE8888104038T patent/DE3881731D1/en not_active Expired - Fee Related
- 1988-03-15 EP EP88104038A patent/EP0283897B1/en not_active Expired - Lifetime
- 1988-03-15 AT AT88104038T patent/ATE90810T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3881731D1 (en) | 1993-07-22 |
| EP0283897A2 (en) | 1988-09-28 |
| ATE90810T1 (en) | 1993-07-15 |
| DE3709947A1 (en) | 1988-10-06 |
| EP0283897A3 (en) | 1990-10-24 |
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