EP0447910B1 - Plug socket - Google Patents

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Publication number
EP0447910B1
EP0447910B1 EP91103671A EP91103671A EP0447910B1 EP 0447910 B1 EP0447910 B1 EP 0447910B1 EP 91103671 A EP91103671 A EP 91103671A EP 91103671 A EP91103671 A EP 91103671A EP 0447910 B1 EP0447910 B1 EP 0447910B1
Authority
EP
European Patent Office
Prior art keywords
plug socket
socket according
plug
partial electrodes
electrode
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
Application number
EP91103671A
Other languages
German (de)
French (fr)
Other versions
EP0447910A3 (en
EP0447910A2 (en
Inventor
Erwin Dipl.-Ing. Reichl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Sachsenwerk GmbH
Original Assignee
Sachsenwerk AG
AEG Sachsenwerk GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sachsenwerk AG, AEG Sachsenwerk GmbH filed Critical Sachsenwerk AG
Publication of EP0447910A2 publication Critical patent/EP0447910A2/en
Publication of EP0447910A3 publication Critical patent/EP0447910A3/en
Application granted granted Critical
Publication of EP0447910B1 publication Critical patent/EP0447910B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/53Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing

Definitions

  • the invention relates to a socket according to the preamble of the first claim.
  • an inner cone recess is formed in an insulating body from one end face, to the bottom of which a hollow bell-shaped plug contact is axially connected.
  • a hat-shaped field control body is connected to this plug contact, which is embedded in the insulating body and extends over the part length of the inner cone recess to open it.
  • fastening fittings which are oriented axially parallel.
  • a current transformer coil is embedded in the insulating body at the opposite end of the plug contact, from which a further ring-shaped field control body extends to the inner cone recess and surrounds the plug contact over a partial length.
  • This further field control body also forms an electrode for displaying a voltage or for voltage measurement via a radially leading measuring line.
  • This arrangement results in an axially elongated structure, in which the electrical breakdown resistance field distortion occurs due to the fastening fittings located in the area of the opening in the inner cone recess.
  • an insulating body penetrates an opening in the wall of a high-voltage device.
  • the insulating body has an end opening of an inner cone recess into which a cable plug can be inserted.
  • a hat-shaped field control body is connected to a plug contact arranged in the inner cone recess, which is embedded in the insulating body and the free edge of which points towards the end face adjacent to the housing wall.
  • Fastening fittings are cast into the insulating body, concentrically to the opening of the inner cone recess, through which the plug socket is screwed to the housing wall or the cable connector with the insertion of a pressure ring.
  • an electrode set back relative to the end face is provided, which is capacitively coupled on the one hand to the field control body and, on the other hand, is connected via an electrical plug connection to electrical measuring devices arranged outside the device housing.
  • the end face of the insulating body is seated gas-tight on the housing wall with the interposition of a seal. Due to the required high voltage dielectric strength, the electrode must be at a considerable distance from the field control body. The consequence of this is that the electrical capacitance value between the electrode and the field control body is very low, and thus the capacitance is very high.
  • the invention has for its object to take measures in a socket according to the preamble of the first claim, by means of which an improvement in the electrical field pattern in the region of the end-side fastening fittings is achieved with an optimal capacitance value of the electrode arrangement.
  • the arrangement of an electrode around the inner cone recess results in a large-area coupling to the plug contact or the associated field control body and thus a substantial increase in the capacitance value.
  • the electrode has a plurality of individual partial electrodes which are arranged in the circumferential direction between adjacent fastening fittings and are electrically connected to one another.
  • the overall electrode profile need not protrude beyond the radial profile specified by the fastening fittings.
  • the partial electrodes are preferably hood-shaped and with the rounded end directed towards the field control body, which is connected to a high-voltage plug-in contact part at the end of the inner cone recess.
  • the rounding of the partial electrodes results in a large area which is executed for the field control body, which increases the capacitance value and also a favorable electrical field distribution.
  • the electrodes are preferably made of sieve or grid-like material, so that an intimate, detachment-free connection occurs with the casting resin used for the production of the insulating body.
  • the connecting line of the individual partial electrodes can run between the fastening fittings and the outer surface of the inner cone recess.
  • the connecting conductor which is preferably in the form of a ribbon cable, can be flattened in the region of fastening fittings and fixed there using small insulation supports on the fastening fitting concerned before it is poured into the casting resin.
  • the connecting line is provided in the area of two partial electrodes with a connecting lug, which is arranged axially with the inner cone recess and points to the end face in a recess open to the end face.
  • the connecting conductor with the partial electrodes attached to it can be held in a correspondingly designed holding device in the casting mold until the casting resin mass solidifies.
  • At least one of the connecting lugs can then be removed from the Cast a plug for connecting a measuring device to be plugged in.
  • a spacer ring is placed on the end face as a counterpart, with the edge of the opening required for the insertion of a cable plug protruding between the end face and the spacer ring.
  • the spacer ring is used for uniform pressure distribution over the circumference of the opening, so that the end face of the socket with an annular seal provided there is pressed gas-tight over the entire circumference to the housing wall in question when the screws are screwed into the associated fastening fittings from the spacer ring.
  • the arrangement of the connecting line and possibly areas of the partial electrodes is preferably such that they lie in the field shadow of a shield, which is inserted into the inner cone recess when a cable connector is inserted.
  • This grounded shield prevents a conductor guided inside the cable connector from being capacitively coupled to the connecting line or adjacent areas of the partial electrodes.
  • the capacitance value desired for the voltage coupling is determined in particular by the geometry between the field control body and the partial electrodes. The high-voltage value detected via the partial electrodes is thus changed only slightly when the cable plug is inserted or removed.
  • a socket 1 of an inner cone plug coupling as is customary for the connection of high-voltage cables in medium-voltage switchgear, has an insulating body 2 made of cast resin, in which an inner cone recess 3 is formed, which is open to an end face 4. At the opposite end, the inner cone recess 3 is followed by an axially identical plug contact part 5, which is to be connected to high-voltage internals in the encapsulated high-voltage device.
  • Fastening fittings 6 and 7 are incorporated into the insulating body 2 from the end face 4 and are axially parallel to the central axis 8 of the inner cone recess. The fastening fittings are located on circular lines concentric to the opening of the inner cone recess, radially outside the inner cone recess.
  • the end face 4 of the socket 1 lies in one plane on a wall 9 of a housing, within which high-voltage switchgear parts are located.
  • this wall 9 is provided with a corresponding opening through which a cable connector 10 can be inserted from the outside.
  • a hat-shaped field control body 11 is also attached to the high-voltage plug contact part 5, which is also embedded in the insulating body 2 and encompasses the adjacent section of the inner cone recess in a ring.
  • an electrode 12 which is electrically insulated from it, is arranged in the region of the end face 4 and is arranged around the inner cone recess 3.
  • this electrically insulated electrode 12 is formed from a plurality of partial electrodes 12.1 which are arranged in the circumferential direction between adjacent fastening fittings 6 and 7, respectively. These partial electrodes 12.1 are electrically connected to one another via a connecting line 13, the electrical connecting line 13 being embedded within the insulating body 2 in the insulating compound.
  • the electrodes 12 and the connecting conductor 13 are preferably made of sieve or grid-like material, so that there is an intimate embedding which prevents the insulating compound from separating from the electrode or the connecting line during the shrinking process during the curing of the casting resin and forming dielectric defects become.
  • the partial electrodes 12.1 can extend in the radial direction over the same area as the fastening fittings and on the other hand largely occupy the space between adjacent fastening fittings 6, 7 and in the axial direction as far as into the insulating body 2 as the fittings 6, 7. This results in an extensive symmetrization of the electrical field, after which the spaces between adjacent fastening electrodes 6, 7 are then provided with electrically conductive parts which, at least approximately like the fastening fittings, are electrically almost at ground potential.
  • the partial electrodes 12.1 are hood-shaped and have the rounded end facing the field control body 11. The rounding contributes to the favorable field distribution and forms a relatively large area compared to the field control body, the one correspondingly high capacity value.
  • the resulting low capacitive resistance value enables the pending high voltage to be detected with relatively simple measuring devices.
  • a connecting lug is attached to the connecting conductor 13, which projects into the space enclosed by the respective partial electrode 12 and is axially aligned is arranged to the inner cone recess in a recess 16 which is open to the end face 4.
  • the connecting lug 15 also points with its free end to the end face 4.
  • the respective terminal lug can be inserted into a holder corresponding to the recess 16, which is located within the casting mold which is used to produce the insulating body 2 with the internals.
  • the connecting line 13 is located in the area that lies between the wall of the inner cone recess 3 and the fastening fittings 6, 7. In the axial direction, the connecting line 13 does not extend beyond the fastening fittings 6, 7.
  • the socket 1 is fixed to the wall 9 with the interposition of a sealing ring 17.
  • a spacer ring 18 is attached from the opposite side of the wall, which engages under the end face 4 with its radially inner part and with the radially outer part Part rests on the wall 9.
  • This spacer ring 18 has an opening 19 which is aligned with the respective connecting lug 15 and merges into a groove 20 which extends radially outward. Through the opening 19, a plug 21 can thus be plugged into the terminal lug 15, from which an electrical line 22 can be guided through the groove 20 to a measuring device, not shown.
  • a flange 23 of the cable connector 10 is seated on the spacer ring 18, a screw being able to be screwed into the associated fastening fitting 7 through the flange 23 and the spacer ring 18 and the wall 9.
  • the socket 1 is fixed on the spacer ring 18 on the wall 9.
  • the cable connector 10 has an electrical shield 24 which is guided in the outer jacket region and is connected to earth potential and extends axially beyond the connecting line 13 into the inner cone recess 3. It thus shields not only the connecting line 13 but also adjacent areas of the partial electrodes 12.1 from a conductor running axially within the cable connector 10.
  • This conductor thus does not have a direct capacitive effect on the connecting line 13 or the relevant area of the partial electrodes 12.1, so that the voltage measured at the partial electrodes 12.1 is largely independent of whether the cable connector 10 is inserted into the socket 1 or not.
  • the capacitive coupling thus takes place even when the cable connector 10 is inserted via the rounded ends of the partial electrodes 12.1 facing the field control body 11.
  • the shielding 24, by virtue of its arrangement with respect to the connecting line 13 and the partial electrodes 12.1, causes the electrical field generated by the cable connector 10 to be largely shaded with respect to the electrode 12.

Landscapes

  • Cable Accessories (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Description

Die Erfindung betrifft eine Steckbuchse gemäß dem Oberbegriff des ersten Anspruchs.The invention relates to a socket according to the preamble of the first claim.

Bei einer bekannten Steckbuchse dieser Art DE-A 36 11 462 ist in einem Isolierkörper von einer Stirnseite aus eine Innenkonusausnehmung ausgeformt, an deren Grund sich ein hohler glockenförmiger Steckkontakt axial anschließt. Mit diesem Steckkontakt ist ein hutförmiger Feldsteuerkörper verbunden, der in den Isolierkörper eingebettet ist und sich zur Öffnung der Innenkonusausnehmung hin über eine Teillänge derselben erstreckt. Im Bereich der Stirnseite des Isolierkörpers befinden sich achsparallel gerichtete Befestigungsarmaturen. Außerdem ist in den Isolierkörper am gegenüberliegenden Ende des Steckkontakts eine Stromwandlerspule eingebettet, von der ein weiterer ringförmiger Feldsteuerkörper sich zur Innenkonusausnehmung hin erstreckt und den Steckkontakt über eine Teillänge umgibt. Diesere weitere Feldsteuerkörper bildet zugleich eine Elektrode zur Anzeige einer Spannung oder zur Spannungsmessung über eine radial wegführende Meßleitung. Bei dieser Anordnung ergibt sich ein axial langgestreckter Aufbau, bei dem durch die im Bereich der Öffnung der Innenkonusausnehmung befindlichen Befestigungsarmaturen eine die elektrische Durchschlagfestigkeit mindernde Feldverzerrung auftritt.In a known socket of this type DE-A 36 11 462, an inner cone recess is formed in an insulating body from one end face, to the bottom of which a hollow bell-shaped plug contact is axially connected. A hat-shaped field control body is connected to this plug contact, which is embedded in the insulating body and extends over the part length of the inner cone recess to open it. In the area of the end face of the insulating body there are fastening fittings which are oriented axially parallel. In addition, a current transformer coil is embedded in the insulating body at the opposite end of the plug contact, from which a further ring-shaped field control body extends to the inner cone recess and surrounds the plug contact over a partial length. This further field control body also forms an electrode for displaying a voltage or for voltage measurement via a radially leading measuring line. This arrangement results in an axially elongated structure, in which the electrical breakdown resistance field distortion occurs due to the fastening fittings located in the area of the opening in the inner cone recess.

Bei einer weiteren bekannten Steckbuchse (DE-A 36 44 890) durchdringt ein Isolierkörper einen Durchbruch in der Wandung eines Hochspannungsgerätes. Der Isolierkörper weist eine stirnseitige Öffnung einer Innenkonusausnehmung auf, in die ein Kabelstecker einführbar ist. Mit einem in der Innenkonusausnehmung angeordneten Steckkontakt ist ein hutförmiger Feldsteuerkörper verbunden, der in den Isolierkörper eingebettet ist und dessen freier Rand zu der der Gehäusewand benachbarten Stirnseite hinweist. Konzentrisch zur Öffnung der Innenkonusausnehmung sind in den Isolierkörper achsparallel gerichtet Befestigungsarmaturen eingegossen, über welche die Steckbuchse an der Gehäusewand bzw. der Kabelstecker unter Einfügung eines Druckringes festgeschraubt wird. Dabei ist anstelle einer Befestigungsarmatur eine gegenüber der Stirnseite zurückgesetzte Elektrode vorgesehen, die einerseits kapazitiv mit dem Feldsteuerkörper gekoppelt und andererseits über eine elektrische Steckverbindung mit außerhalb des Gerätegehäuses angeordneten elektrischen Meßeinrichtungen verbunden ist. Die Stirnseite des Isolierkörpers sitzt im übrigen unter Zwischenlage einer Dichtung gasdicht auf der Gehäusewand auf. Aufgrund der erforderlichen Hochspannungsdurchschlagfestigkeit muß die Elektrode vom Feldsteuerkörper einen erheblichen Abstand aufweisen. Das hat zur Folge, daß der zwischen der Elektrode und dem Feldsteuerkörper gegebene elektrische Kapazitätswert sehr gering und damit der kapazitive Widerstand sehr hoch ist. Dadurch sind hochempfindliche Meßeinrichtungen zur Erfassung der am Steckkontakt anstehenden Spannung erforderlich, wobei die kapazitive Belastung durch die Erdkapazitäten benachbarter geerdeter Teile und der geschirmten elektrischen Leitung von der Elektrode bis zum Meßgerät beachtlich ist. Außerdem ist der Kopf der Elektrode kugelförmig erweitert, so daß das Profil der Befestigungsarmaturen in radialer Richtung entsprechend weiter überschritten wird.In another known socket (DE-A 36 44 890) an insulating body penetrates an opening in the wall of a high-voltage device. The insulating body has an end opening of an inner cone recess into which a cable plug can be inserted. A hat-shaped field control body is connected to a plug contact arranged in the inner cone recess, which is embedded in the insulating body and the free edge of which points towards the end face adjacent to the housing wall. Fastening fittings are cast into the insulating body, concentrically to the opening of the inner cone recess, through which the plug socket is screwed to the housing wall or the cable connector with the insertion of a pressure ring. Instead of a fastening fitting, an electrode set back relative to the end face is provided, which is capacitively coupled on the one hand to the field control body and, on the other hand, is connected via an electrical plug connection to electrical measuring devices arranged outside the device housing. The end face of the insulating body is seated gas-tight on the housing wall with the interposition of a seal. Due to the required high voltage dielectric strength, the electrode must be at a considerable distance from the field control body. The consequence of this is that the electrical capacitance value between the electrode and the field control body is very low, and thus the capacitance is very high. As a result, highly sensitive measuring devices are required to detect the voltage present at the plug contact, the capacitive load due to the earth capacitance of adjacent earthed parts and the shielded electrical line from the electrode to the measuring device being considerable. In addition, the head of the electrode is expanded spherically, so that the profile the mounting fittings in the radial direction are exceeded accordingly.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Steckbuchse gemäß dem Oberbegriff des ersten Anspruchs Maßnahmen zu treffen, durch welche bei optimalem Kapazitätswert der Elektrodenanordnung eine Verbesserung des elektrischen Feldbildes im Bereich der stirnseitigen Befestigungsarmaturen erzielt wird.The invention has for its object to take measures in a socket according to the preamble of the first claim, by means of which an improvement in the electrical field pattern in the region of the end-side fastening fittings is achieved with an optimal capacitance value of the electrode arrangement.

Bei einem Aufbau einer Steckbuchse gemäß der Erfindung wird durch die Anordnung einer Elektrode um die Innenkonusausnehmung herum eine großflächige Kupplung zum Steckkontakt bzw. dem damit verbundenen Feldsteuerkörper und damit eine wesentliche Erhöhung des Kapazitätswertes erreicht. Dabei weist die Elektrode mehrere einzelne Teilelektroden auf, die in Umfangsrichtung zwischen benachbarten Befestigungsarmaturen angeordnet und untereinander elektrisch verbunden sind. Hierdurch wird eine fast vollständige Anpassung des elektrischen Feldbildes an das bereits von den Befestigungsarmaturen vorgegebene elektrische Feldbild erreicht. Dadurch wird auch zur Homogenisierung des Feldbildes beigetragen, weil sich nun auch zwischen den einzelnen Befestigungsarmaturen Elektrodenabschnitte befinden. Es ergibt sich dadurch eine der idealen Ringelektrode angenäherte Gesamtelektrodenform mit der daraus resultierenden gleichmäßigen Feldverteilung. Das Elektroden-Gesamtprofil braucht dabei nicht über das von den Befestigungsarmaturen vorgegebene radiale Profil hinauszuragen. Die Teilelektroden sind vorzugsweise haubenförmig ausgebildet und mit dem gerundeten Ende zum Feldsteuerkörper hin gerichtet, der am Ende der Innenkonusausnehmung mit einem hochspannungsführenden Steckkontaktteil verbunden ist. Durch die Rundung der Teilelektroden ergibt sich eine zum Feldsteuerkörper hingerichtete große Fläche, welche den Kapazitätswert erhöht und zudem eine günstige elektrische Feldverteilung. Die Elektroden bestehen vorzugsweise aus Sieb- oder gitterartigem Material, so daß eine innige, ablösungsfreie Verbindung mit dem für die Herstellung des Isolierkörpers verwendeten Gießharz eintritt. Die Verbindungsleitung der einzelnen Teilelektroden kann zwischen den Befestigungsarmaturen und der Mantelfläche der Innenkonusausnehmung verlaufen. Dabei kann im Bereich von Befestigungsarmaturen der vorzugsweise als Bandleitung ausgebildete Verbindungsleiter im Bereich von Befestigungsarmaturen abgeflacht und dort über kleine Isolierstützer an der betreffenden Befestigungsarmatur vor dem Eingießen in das Gießharzs festgelegt werden. Vorzugsweise ist jedoch die Verbindungsleitung im Bereich von zwei Teilelektroden mit je einer Anschlußfahne versehen, die achsengleich zur Innenkonusausnehmung angeordnet ist und in einer zur Stirnseite offenen Aussparung zur Stirnseite hinweist. In der Gießform kann so der Verbindungsleiter mit den daran befestigten Teilelektroden an einer entsprechend ausgebildeten Haltevorrichtung in der Gießform bis zum Erstarren der Gießharzmasse gehalten werden. An wenigstens eine der Anschlußfahnen kann dann nach dem Entformen aus der Gießform ein Stecker für den Anschluß eines Meßgerätes angesteckt werden. Für die Montage der Steckbuchse an einer entsprechend durchbrochenen Gerätewand wird als Gegenlage an die Stirnseite ein Abstandsring angesetzt, wobei zwischen die Stirnseite und den Abstandsring der Rand der für das Einführen eines Kabelsteckers erforderliche Durchbruch ragt. Der Abstandsring dient dabei zur gleichmäßigen Druckverteilung über den Umfang des Durchbruchs, so daß die Stirnseite der Steckbuchse mit einer dort vorgesehenen Ringdichtung über den gesamten Umfang gasdicht an die betreffende Gehäusewand angepreßt wird, wenn die Schrauben in die zugehörigen Befestigungsarmaturen vom Abstandsring her eingeschraubt sind. Die Anordnung der Verbindungsleitung und gegebenenfalls von Bereichen der Teilelektroden ist vorzugsweise so getroffen, daß sie im Feldschatten einer Abschirmung liegen, die mit dem Einführen eines Kabelsteckers in die Innenkonusausnehmung mit eingeführt wird. Diese geerdete Abschirmung verhindert, daß ein innerhalb des Kabelsteckers geführter Leiter kapazitiv mit der Verbindungsleitung bzw. benachbarten Bereichen der Teilelektroden gekoppelt ist. Dadurch wird der für die Spannungsankopplung gewünschte Kapazitätswert insbesondere durch die Geometrie zwischen dem Feldsteuerkörper und den Teilelektroden bestimmt. Es wird somit der über die Teilelektroden erfaßte Hochspannungswert nur geringfügig geändert, wenn der Kabelstecker eingeführt oder herausgezogen ist.In the construction of a plug socket according to the invention, the arrangement of an electrode around the inner cone recess results in a large-area coupling to the plug contact or the associated field control body and thus a substantial increase in the capacitance value. The electrode has a plurality of individual partial electrodes which are arranged in the circumferential direction between adjacent fastening fittings and are electrically connected to one another. As a result, an almost complete adaptation of the electrical field image to the electrical field image already specified by the fastening fittings is achieved. This also contributes to the homogenization of the field image, because there are now electrode sections between the individual fastening fittings. This results in an overall electrode shape approximating the ideal ring electrode with the resulting uniform field distribution. The overall electrode profile need not protrude beyond the radial profile specified by the fastening fittings. The partial electrodes are preferably hood-shaped and with the rounded end directed towards the field control body, which is connected to a high-voltage plug-in contact part at the end of the inner cone recess. The rounding of the partial electrodes results in a large area which is executed for the field control body, which increases the capacitance value and also a favorable electrical field distribution. The electrodes are preferably made of sieve or grid-like material, so that an intimate, detachment-free connection occurs with the casting resin used for the production of the insulating body. The connecting line of the individual partial electrodes can run between the fastening fittings and the outer surface of the inner cone recess. In the area of fastening fittings, the connecting conductor, which is preferably in the form of a ribbon cable, can be flattened in the region of fastening fittings and fixed there using small insulation supports on the fastening fitting concerned before it is poured into the casting resin. Preferably, however, the connecting line is provided in the area of two partial electrodes with a connecting lug, which is arranged axially with the inner cone recess and points to the end face in a recess open to the end face. In the casting mold, the connecting conductor with the partial electrodes attached to it can be held in a correspondingly designed holding device in the casting mold until the casting resin mass solidifies. At least one of the connecting lugs can then be removed from the Cast a plug for connecting a measuring device to be plugged in. To mount the socket on a correspondingly perforated device wall, a spacer ring is placed on the end face as a counterpart, with the edge of the opening required for the insertion of a cable plug protruding between the end face and the spacer ring. The spacer ring is used for uniform pressure distribution over the circumference of the opening, so that the end face of the socket with an annular seal provided there is pressed gas-tight over the entire circumference to the housing wall in question when the screws are screwed into the associated fastening fittings from the spacer ring. The arrangement of the connecting line and possibly areas of the partial electrodes is preferably such that they lie in the field shadow of a shield, which is inserted into the inner cone recess when a cable connector is inserted. This grounded shield prevents a conductor guided inside the cable connector from being capacitively coupled to the connecting line or adjacent areas of the partial electrodes. As a result, the capacitance value desired for the voltage coupling is determined in particular by the geometry between the field control body and the partial electrodes. The high-voltage value detected via the partial electrodes is thus changed only slightly when the cable plug is inserted or removed.

Die Erfindung ist nachfolgend anhand der Zeichnungen von Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to the drawings of exemplary embodiments.

Es zeigen:

  • Fig. 1 einen Längsschnitt durch eine an eine Gehäusewand angesetzte Steckbuchse, und
  • Fig. 2 eine Draufsicht auf die freie Stirnseite der Steckbuchse nach Figur 1 mit Darstellung der Einzelteile nach Art einer Röntgenaufnahme.
Show it:
  • Fig. 1 shows a longitudinal section through a socket attached to a housing wall, and
  • Fig. 2 is a plan view of the free end face of the socket of Figure 1 showing the individual parts in the manner of an X-ray.

Eine Steckbuchse 1 einer Innenkonus-Steckkupplung, wie sie für den Anschluß von Hochspannungskabeln in Mittelspannungsschaltanlagen üblich ist, weist einen aus Gießharz hergestellten Isolierkörper 2 auf, in dem eine Innenkonusausnehmung 3 ausgeformt ist, die zu einer Stirnseite 4 hin offen ist. Am gegenüberliegenden Ende schließt sich an die Innenkonusausnehmung 3 ein achsengleiches Steckkontaktteil 5 an, das mit hochspannungsführenden Einbauten in dem gekapselten Hochspannungsgerät zu verbinden ist. Von der Stirnseite 4 aus sind in den Isolierkörper 2 Befestigungsarmaturen 6 bzw. 7 eingearbeitet, die achsparallel zur Mittelachse 8 der Innenkonusausnehmung stehen. Die Befestigungsarmaturen befinden sich auf konzentrisch zur Öffnung der Innenkonusausnehmung verlaufenden Kreislinien radial außerhalb der Innenkonusausnehmung. Die Stirnfläche 4 der Steckbuchse 1 liegt in einer Ebene auf einer Wandung 9 eines Gehäuses auf, innerhalb welchem sich Hochspannungsschaltanlagenteile befinden. Im Bereich der Innenkonusausnehmung ist diese Wand 9 mit einem entsprechenden Durchbruch versehen, durch den von außen ein Kabelstecker 10 eingeführt werden kann. An den hochspannungsführenden Steckkontaktteil 5 ist zudem ein hutförmiger Feldsteuerkörper 11 angesetzt, der ebenfalls in den Isolierkörper 2 eingebettet ist und ringförmig den benachbarten Abschnitt der Innenkonusausnehmung umgreift.A socket 1 of an inner cone plug coupling, as is customary for the connection of high-voltage cables in medium-voltage switchgear, has an insulating body 2 made of cast resin, in which an inner cone recess 3 is formed, which is open to an end face 4. At the opposite end, the inner cone recess 3 is followed by an axially identical plug contact part 5, which is to be connected to high-voltage internals in the encapsulated high-voltage device. Fastening fittings 6 and 7 are incorporated into the insulating body 2 from the end face 4 and are axially parallel to the central axis 8 of the inner cone recess. The fastening fittings are located on circular lines concentric to the opening of the inner cone recess, radially outside the inner cone recess. The end face 4 of the socket 1 lies in one plane on a wall 9 of a housing, within which high-voltage switchgear parts are located. In the area of the inner cone recess, this wall 9 is provided with a corresponding opening through which a cable connector 10 can be inserted from the outside. A hat-shaped field control body 11 is also attached to the high-voltage plug contact part 5, which is also embedded in the insulating body 2 and encompasses the adjacent section of the inner cone recess in a ring.

Um einen kapazitiven Spannungsabgriff zur Messung der am Steckkontaktteil 5 bzw. dem Feldsteuerkörper 11 anliegenden Hochspannung zu schaffen, ist als kapazitiv wirkender Gegenbelag zum Feldsteuerkörper 11 eine davon elektrisch isolierte Elektrode 12 im Bereich der Stirnseite 4 angeordnet, die um die Innenkonusausnehmung 3 herum angeordnet ist.By a capacitive voltage tap for measuring the contacts on the plug contact part 5 or the field control body 11 To create high voltage, a capacitively acting counter-coating to the field control body 11, an electrode 12, which is electrically insulated from it, is arranged in the region of the end face 4 and is arranged around the inner cone recess 3.

Diese elektrisch isolierte Elektrode 12 ist gemäß Figur 2 aus mehreren Teilelektroden 12.1 gebildet, die in Umfangsrichtung zwischen benachbarten Befestigungsarmaturen 6 bzw. 7 angeordnet sind. Diese Teileelektroden 12.1 stehen über eine Verbindungsleitung 13 miteinander in elektrischer Verbindung, wobei die elektrische Verbindungsleitung 13 innerhalb des Isolierkörpers 2 in die Isoliermasse eingebettet ist. Die Elektroden 12 wie der Verbindungsleiter 13 bestehen vorzugsweise aus sieb- oder gitterartigem Material, so daß sich eine innige Einbettung ergibt, die verhindert, daß sich beim Schrumpfungsprozeß während des Aushärtens des Gießharzes die Isoliermasse von der Elektrode bzw. der Verbindungsleitung trennt und dielektrische Fehlstellen gebildet werden. Die Teilelektroden 12.1 können sich dabei in radialer Richtung über den gleichen Bereich wie die Befestigungsarmaturen erstrecken und andererseits weitgehend den Raum zwischen benachbarten Befestigungsarmaturen 6,7 einnehmen sowie in axialer Richtung soweit in den Isolierkörper 2 wie die Armaturen 6,7. Es ergibt sich dadurch eine weitgehende Symmetrierung des elektrischen Feldes, nachdem dann auch die Zwischenräume zwischen benachbarten Befestigungselektroden 6,7 mit elektrisch leitenden Teilen versehen sind, die zumindest annähernd wie die Befestigungsarmaturen elektrisch fast an Massepotential liegen. Dabei sind die Teilelektroden 12.1 haubenförmig ausgebildet und mit dem gerundeten Ende zum Feldsteuerkörper 11 gerichtet. Die Rundung trägt dabei zur günstigen Feldverteilung bei und bildet gegenüber dem Feldsteuerkörper eine relativ große Fläche, die einen entsprechenden hohen Kapazitätswert mit sich bringt. Der dadurch erzielte geringe kapazitive Widerstandswert ermöglicht die Erfassung der anstehenden Hochspannung mit relativ einfachen Meßeinrichtungen. Die zugleich als Montagehilfe für die Positionierung der Teilelektroden 12.1 in einer Gießform dienende Verbindungsleitung 13 ist im radialen Bereich von Befestigungsarmaturen 6 abweichend von der Kreisringform abgeflacht und am abgeflachten Teil mit einem kleinen Stützisolator 14 versehen, der an den betreffenden Befestigungsarmaturen 6 festgelegt ist, um die Teilelektroden 12.1 während des Gießvorganges des Isolierkörpers 2 zu zentrieren. Vorzugsweise wird zur Positionierung der Teilelektroden 12 in der betreffenden Gießform jedoch anstelle der Stützisolatoren 14 im Bereich mindestens einer, vorzugsweise jedoch im Bereich mehrerer Teilelktroden 12.1 eine Anschlußfahne an den Verbindungsleiter 13 angebracht, die in den von der jeweiligen Teilelektrode 12 umschlossenen Raum ragt und die achsengleich zur Innenkonusausnehmung in einer Aussparung 16 angeordnet ist, die zur Stirnseite 4 hin offen ist. Auch die Anschlußfahne 15 weist mit ihrem freien Ende zur Stirnseite 4 hin. Dadurch kann die jeweilige Anschlußfahne in eine der Aussparung 16 entsprechende Halterung eingesteckt werden, der sich innerhalb der Gießform befindet, die zur Herstellung des Isolierkörpers 2 mit den Einbauten dient. Die Verbindungsleitung 13 befindet sich in den Bereich, der zwischen der Wandung der Innenkonusausnehnung 3 und den Befestigungsarmaturen 6,7 liegt. In achsialer Richtung greift die Verbindungsleitung 13 nicht über die Befestigungsarmaturen 6,7 hinaus.According to FIG. 2, this electrically insulated electrode 12 is formed from a plurality of partial electrodes 12.1 which are arranged in the circumferential direction between adjacent fastening fittings 6 and 7, respectively. These partial electrodes 12.1 are electrically connected to one another via a connecting line 13, the electrical connecting line 13 being embedded within the insulating body 2 in the insulating compound. The electrodes 12 and the connecting conductor 13 are preferably made of sieve or grid-like material, so that there is an intimate embedding which prevents the insulating compound from separating from the electrode or the connecting line during the shrinking process during the curing of the casting resin and forming dielectric defects become. The partial electrodes 12.1 can extend in the radial direction over the same area as the fastening fittings and on the other hand largely occupy the space between adjacent fastening fittings 6, 7 and in the axial direction as far as into the insulating body 2 as the fittings 6, 7. This results in an extensive symmetrization of the electrical field, after which the spaces between adjacent fastening electrodes 6, 7 are then provided with electrically conductive parts which, at least approximately like the fastening fittings, are electrically almost at ground potential. The partial electrodes 12.1 are hood-shaped and have the rounded end facing the field control body 11. The rounding contributes to the favorable field distribution and forms a relatively large area compared to the field control body, the one correspondingly high capacity value. The resulting low capacitive resistance value enables the pending high voltage to be detected with relatively simple measuring devices. The connecting line 13, which also serves as an assembly aid for the positioning of the partial electrodes 12.1 in a casting mold, is flattened in the radial area of fastening fittings 6, deviating from the circular ring shape, and is provided on the flattened part with a small support insulator 14, which is fixed to the fastening fittings 6 concerned, around the Center partial electrodes 12.1 during the casting process of the insulating body 2. Preferably, however, for positioning the partial electrodes 12 in the relevant mold, instead of the support insulators 14 in the area of at least one, but preferably in the area of a plurality of partial electrodes 12.1, a connecting lug is attached to the connecting conductor 13, which projects into the space enclosed by the respective partial electrode 12 and is axially aligned is arranged to the inner cone recess in a recess 16 which is open to the end face 4. The connecting lug 15 also points with its free end to the end face 4. As a result, the respective terminal lug can be inserted into a holder corresponding to the recess 16, which is located within the casting mold which is used to produce the insulating body 2 with the internals. The connecting line 13 is located in the area that lies between the wall of the inner cone recess 3 and the fastening fittings 6, 7. In the axial direction, the connecting line 13 does not extend beyond the fastening fittings 6, 7.

Die Steckbuchse 1 wird an der Wand 9 unter Zwischenlage eines Dichtungsringes 17 festgesetzt. Dazu wird von der gegenüberliegenden Seite der Wand aus ein Abstandsring 18 angesetzt, der mit seinem radial innen liegenden Teil die Stirnseite 4 untergreift und mit dem radial außen liegenden Teil auf der Wand 9 aufliegt. Dieser Abstandsring 18 weist einen mit der jeweiligen Anschlußfahne 15 fluchtenden Durchbruch 19 auf, der in eine radial nach außen verlaufende Nut 20 übergeht. Durch den Durchbruch 19 kann somit ein Stecker 21 an die Anschlußfahne 15 angesteckt werden, von dem eine elektrische Leitung 22 durch die Nut 20 zu einem nicht dargestellten Meßgerät geführt werden kann. Auf dem Abstandsring 18 sitzt andererseits ein Flansch 23 des Kabelsteckers 10 auf, wobei durch den Flansch 23 und den Abstandsring 18 sowie die Wand 9 hindurch je eine Schraube in die zugeordnete Befestigungsarmatur 7 eingedreht werden kann. Über die Befestigungsarmaturen 6 wird die Steckbuchse 1 für sich über den Abstandring 18 an der Wand 9 festgesetzt. Der Kabelstecker 10 weist dabei eine im äußeren Mantelbereich geführte elektrische Abschirmung 24 auf, die an Erdpotential angeschlossen ist und axial bis über die Verbindungsleitung 13 hinaus in die Innenkonusausnehmung 3 reicht. Sie schirmt somit nicht nur die Verbindungsleitung 13 sondern auch benachbarte Bereiche der Teilelektroden 12.1 gegenüber einem innerhalb des Kabelsteckers 10 axial verlaufenden Leiter ab. Dieser Leiter wirkt somit nicht unmittelbar kapazitiv auf die Verbindungsleitung 13 bzw. die betreffenden Bereich der Teilelektroden 12.1, so daß die an den Teilelektroden 12.1 gemessene Spannung weitgehend unabhängig ist, ob der Kabelstecker 10 in die Steckbuchse 1 eingeführt ist oder nicht. Die kapazitive Kopplung erfolgt somit auch bei eingestecktem Kabelstecker 10 über die dem Feldsteuerkörper 11 direkt zugewandten gerundeten Enden der Teilelektroden 12.1. Die Abschirmung 24 bewirkt somit durch ihre Anordnung gegenüber der Verbindungsleitung 13 und den Teilelektroden 12.1 eine weitgehende Abschattung des vom Kabelsteckers 10 erzeugten elektrischen Feldes gegenüber der Elektrode 12.The socket 1 is fixed to the wall 9 with the interposition of a sealing ring 17. For this purpose, a spacer ring 18 is attached from the opposite side of the wall, which engages under the end face 4 with its radially inner part and with the radially outer part Part rests on the wall 9. This spacer ring 18 has an opening 19 which is aligned with the respective connecting lug 15 and merges into a groove 20 which extends radially outward. Through the opening 19, a plug 21 can thus be plugged into the terminal lug 15, from which an electrical line 22 can be guided through the groove 20 to a measuring device, not shown. On the other hand, a flange 23 of the cable connector 10 is seated on the spacer ring 18, a screw being able to be screwed into the associated fastening fitting 7 through the flange 23 and the spacer ring 18 and the wall 9. Via the mounting fittings 6, the socket 1 is fixed on the spacer ring 18 on the wall 9. The cable connector 10 has an electrical shield 24 which is guided in the outer jacket region and is connected to earth potential and extends axially beyond the connecting line 13 into the inner cone recess 3. It thus shields not only the connecting line 13 but also adjacent areas of the partial electrodes 12.1 from a conductor running axially within the cable connector 10. This conductor thus does not have a direct capacitive effect on the connecting line 13 or the relevant area of the partial electrodes 12.1, so that the voltage measured at the partial electrodes 12.1 is largely independent of whether the cable connector 10 is inserted into the socket 1 or not. The capacitive coupling thus takes place even when the cable connector 10 is inserted via the rounded ends of the partial electrodes 12.1 facing the field control body 11. The shielding 24, by virtue of its arrangement with respect to the connecting line 13 and the partial electrodes 12.1, causes the electrical field generated by the cable connector 10 to be largely shaded with respect to the electrode 12.

Claims (9)

  1. Plug socket (1) of a female cone plug-in connector for cables in a high-voltage device, in particular for a medium-voltage switchgear, with an insulating body (2) having on its front end (4) an aperture of a female cone recess (3) and concentrically thereto a plurality of axially parallel fixings (6) disposed radially on the exterior, and with an embedded electrode (12.1, 13) for capacitive voltage output having an electric terminal (15) and a plug-in contact (5), characterised in that in the circumferential direction individual partial electrodes (12.1) are disposed between adjacent fixings (6, 7) around the female cone recess (3), which are electrically interconnected within the insulating body (2).
  2. Plug socket according to claim 1, characterised in that the partial electrodes (12.1) are in the form of a hood whose rounded end faces away from the front end (4).
  3. Plug socket according to claim 1 or 2, characterised in that an annular connecting lead (13) flattened in the radial region by fixings (6) connects the partial electrodes (12.1) together.
  4. Plug socket according to claim 3, characterised in that the connecting lead (13) is connected to at least one fixing (6) via at least one supporting insulator (14).
  5. Plug socket according to claim 1 or one of the subsequent claims, characterised in that in the region of at least one partial electrode (12.1), a terminal lug (15) is disposed coaxially with the female cone recess (3) and points towards the front end (4) in a recess (16).
  6. Plug socket according to claim 5, characterised in that a spacer ring (18) is mounted on the front end (4) and has a gap (19) aligned with the terminal lug (5) and a groove (20) extending radially outwards.
  7. Plug socket according to claim 1 or one of the subsequent claims, characterised in that the electrode (12) or partial electrodes (12.1) consist of gauze-like or grid-like material.
  8. Plug socket according to claim 1 or one of the subsequent claims, characterised in that the connecting lead (13) extends into the region lying between the wall of the female cone recess (3) and at least one fixing (6, 7).
  9. Plug socket according to claim 1 or one of the subsequent claims, characterised in that the connecting lead (13) and optionally regions of the partial electrodes (12.1) lie in the field shadow of the screen (24) of an inserted cable plug (10).
EP91103671A 1990-03-23 1991-03-11 Plug socket Expired - Lifetime EP0447910B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009358A DE4009358C2 (en) 1990-03-23 1990-03-23 Socket
DE4009358 1990-03-23

Publications (3)

Publication Number Publication Date
EP0447910A2 EP0447910A2 (en) 1991-09-25
EP0447910A3 EP0447910A3 (en) 1992-02-26
EP0447910B1 true EP0447910B1 (en) 1995-07-05

Family

ID=6402899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103671A Expired - Lifetime EP0447910B1 (en) 1990-03-23 1991-03-11 Plug socket

Country Status (5)

Country Link
EP (1) EP0447910B1 (en)
JP (1) JPH05129047A (en)
DE (2) DE4009358C2 (en)
FI (1) FI104348B1 (en)
NO (1) NO302006B1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4110196C2 (en) * 1991-03-28 1995-01-05 Pfisterer Elektrotech Karl Plug socket
DE4235044C2 (en) * 1992-10-17 2002-06-20 Alstom Sachsenwerk Gmbh receptacle
DE4312618A1 (en) * 1993-04-19 1994-10-20 Abb Patent Gmbh Cable plug socket
DE19737426B4 (en) * 1997-08-21 2005-05-04 Siemens Ag Socket for medium-voltage switchgear
DE19805068A1 (en) * 1998-02-10 1999-08-12 Abb Patent Gmbh Cable sleeve
US10040962B2 (en) 2013-12-18 2018-08-07 Basf Coatings Gmbh Pigment pastes comprising an aqueous dispersion of a copolymer
DE102014004284B4 (en) * 2014-03-26 2019-11-14 Lapp Insulators Gmbh High-voltage bushing
DE102016205535A1 (en) * 2016-04-04 2017-10-05 Siemens Aktiengesellschaft High-voltage bushing
CN109451647B (en) * 2018-11-01 2020-08-07 中国人民解放军国防科技大学 High current diode cone ceramic package vacuum interface insulation structure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2732268C2 (en) * 1977-07-16 1982-06-03 Kabel- Und Lackdrahtfabriken Gmbh, 6800 Mannheim Cable termination
DE2915369B1 (en) * 1979-04-14 1980-09-18 Pfisterer Elektrotech Karl Set for the end of a medium or high voltage cable
DE2943080C2 (en) * 1979-10-25 1982-04-08 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Set for the end of a medium-voltage or high-voltage cable
DE3110660C2 (en) * 1981-03-19 1983-07-14 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Set for the end of a medium or high voltage cable
DE3247673C2 (en) * 1982-12-23 1986-02-13 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Socket with a field control element
DE3445905A1 (en) * 1984-12-15 1986-06-26 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Coupling
DE3611462A1 (en) * 1986-04-05 1987-10-15 Pfisterer Elektrotech Karl Connecting fitting for conductors of a medium-voltage or high-voltage network
DE3644890A1 (en) * 1986-04-05 1987-11-12 Pfisterer Elektrotech Karl Connecting fitting for conductors of a medium-voltage or high-voltage network

Also Published As

Publication number Publication date
NO911169D0 (en) 1991-03-22
FI104348B (en) 1999-12-31
EP0447910A3 (en) 1992-02-26
DE4009358A1 (en) 1991-09-26
DE59105896D1 (en) 1995-08-10
FI911400A0 (en) 1991-03-22
EP0447910A2 (en) 1991-09-25
FI104348B1 (en) 1999-12-31
FI911400A (en) 1991-09-24
JPH05129047A (en) 1993-05-25
NO302006B1 (en) 1998-01-05
NO911169L (en) 1991-09-24
DE4009358C2 (en) 1997-05-15

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