EP0492127B1 - Bushing for switching devices insulated by pressure gas - Google Patents

Bushing for switching devices insulated by pressure gas Download PDF

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Publication number
EP0492127B1
EP0492127B1 EP91119617A EP91119617A EP0492127B1 EP 0492127 B1 EP0492127 B1 EP 0492127B1 EP 91119617 A EP91119617 A EP 91119617A EP 91119617 A EP91119617 A EP 91119617A EP 0492127 B1 EP0492127 B1 EP 0492127B1
Authority
EP
European Patent Office
Prior art keywords
cone
joining piece
current
inner conductor
bushing according
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
EP91119617A
Other languages
German (de)
French (fr)
Other versions
EP0492127A3 (en
EP0492127A2 (en
Inventor
Horst Deharde
Rolf Dirks
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.)
Felten and Guilleaume Energietechnik AG
Original Assignee
Felten and Guilleaume Energietechnik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Felten and Guilleaume Energietechnik AG filed Critical Felten and Guilleaume Energietechnik AG
Publication of EP0492127A2 publication Critical patent/EP0492127A2/en
Publication of EP0492127A3 publication Critical patent/EP0492127A3/en
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Classifications

    • 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

Definitions

  • the invention relates to a bushing for pressurized gas-insulated switchgear assemblies according to the preamble of claim 1.
  • Such bushings are used in gas-insulated switchgear gas-tight in the housing walls of these systems. After installing a system, it is necessary to subject the connected cables to a voltage test. It is already known that separate feedthroughs are additionally used for the testing of the cables, which are externally connected to a grounding rail in three phases and represent part of the inner grounding switch due to contacts placed in the interior of the system. With this construction, the outer earthing bar can be removed and the internal switch switched into the attached contacts on the inside, whereby a cable test can be carried out in this switching state. In this context, removing the external earth connection can result in a safety-threatening state. Otherwise, the arrangement described above is very expensive and the assignment is difficult to recognize.
  • the invention specified in claim 1 is therefore based on the problem of creating an implementation that allows a simple test of the cable connected to the implementation while increasing the security and reducing the parts required for this.
  • standard plugs and end closure fittings should be able to be connected to the bushing without great effort.
  • a lateral adapter is introduced by a small spatial enlargement of the bushing, the inner conductor of which can be connected on the one hand to the current-carrying inner conductor of the bushing in a simple and electrically tight manner and on the other hand a connection for testing the cable provides.
  • a device connection part 1 is fastened with its fastening flange 2 to a switchgear assembly 17 .
  • a section 4 adjoins the mounting flange 2 and is predominantly cylindrical. In extension of this section 4 , a conical section 3 is arranged, which serves to connect a plug or a cable set (not shown).
  • a current-carrying inner conductor 5 designed as a lead-through bolt is inserted axially in the device connection part 1 .
  • section 4 there is a lateral opening 6 which serves to accommodate an adapter 7 .
  • This adapter 7 contains an inner conductor 8 , which is designed as a threaded stud bolt 12, 13, 14 .
  • an externally threaded part is connected to the shoulder 12 of the threaded stud bolt 13 and on the other hand an internal thread part 14 .
  • the adapter 7 has a bottom 10 with an axial bore 11 , which is designed such that the shoulder 12 of the threaded stud bolt 12, 13, 14 has a firm fit in the ground 10 of the adapter 7 has.
  • the external thread part 13 engages in a threaded blind hole 9 of the current-carrying inner conductor 5
  • the internal thread part 14 which has the same internal diameter as the external diameter of the external thread part 13 , serves to receive an external thread 16 of an insulating plug 15 .
  • the lateral opening 6 of the device connection part 1 has a blind hole-like shape 19 which merges into an axial bore 20 in the region of the extension 12 .
  • the design of the adapter 7 as a hollow cone means that the internal thread part 14 also has an external conical shape 21 which is adapted to the internal cone of the adapter 7 .
  • the cone of the adapter 7 is guided up to the current-carrying inner conductor 5 of the device connection part 1 .
  • a continuous threaded bore 22 is made in the current-carrying inner conductor 5 in order to be able to accommodate the elongated external thread part 13 .
  • a double cone 23 is screwed into the current-carrying conductor 5 as a cable test connection.
  • the double cone 23 is made of silicone rubber and has a shoulder bolt 24 made of electrolytic copper.
  • the shoulder bolt 24 has a threaded part 25 on the side facing the current-carrying inner conductor 5 and a threaded part 26 for receiving a wing nut 27 on the side facing away from the current-carrying inner conductor 5 .
  • the shoulder bolt 24 has a driving ring 28 which is screwed onto the shoulder bolt 24 and is cast by the silicone of the double cone 23 .
  • the opening 6 in the device connection part 1 is closed by a molded part 29 made of insulating material.
  • This molded part 29 is cast in a silicone rubber cone 30 , a driving ring 31 being provided for the silicone part (cast in the molded part 29 ).

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Cable Accessories (AREA)

Description

Die Erfindung betrifft eine Durchführung für druckgasisolierte Schaltanlagen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a bushing for pressurized gas-insulated switchgear assemblies according to the preamble of claim 1.

Derartige Durchführungen werden in druckgasisolierten Schaltanlagen gasdicht in den Gehäusewandungen dieser Anlagen eingesetzt. Nach der Installation einer Anlage ist es erforderlich, die angeschlossenen Kabel einer Spannungsprüfung zu unterziehen. Hierbei ist es bereits bekannt, daß für die Prüfung der Kabel gesonderte Durchführungen zusätzlich eingesetzt werden, welche außen mit einer Erdungsschiene dreiphasig verbunden sind und durch im Innenraum der Anlage aufgesetzte Kontakte einen Teil des inneren Erdungsschalters darstellen. Mit diesem Aufbau kann die äußere Erdungsschiene entfernt werden, der innenliegende Schalter in die aufgesetzten Kontakte im Inneren einschalten, wobei in diesem Schaltzustand eine Kabelprüfung erfolgen kann. In diesem Zusammenhang kann durch das Entfernen der äußeren Erdverbindung ein die Sicherheit gefährdeter Zustand entstehen. Im übrigen ist die zuvor beschriebene Anordnung sehr kostenaufwendig und die Zuordnung schlecht erkennbar.Such bushings are used in gas-insulated switchgear gas-tight in the housing walls of these systems. After installing a system, it is necessary to subject the connected cables to a voltage test. It is already known that separate feedthroughs are additionally used for the testing of the cables, which are externally connected to a grounding rail in three phases and represent part of the inner grounding switch due to contacts placed in the interior of the system. With this construction, the outer earthing bar can be removed and the internal switch switched into the attached contacts on the inside, whereby a cable test can be carried out in this switching state. In this context, removing the external earth connection can result in a safety-threatening state. Otherwise, the arrangement described above is very expensive and the assignment is difficult to recognize.

Der im Anspruch 1 angegebenen Erfindung liegt daher das Problem zugrunde, eine Durchführung zu schaffen, die eine einfache Prüfung des an die Durchführung angeschlossenen Kabels bei gleichzeitiger Erhöhung der Sicherheit und Verminderung der hierfür erforderlichen Teile gestattet. Hierbei sollen handelsübliche Stecker und Endverschlußarmaturen ohne größeren Aufwand an der Durchführung angeschlossen werden können.The invention specified in claim 1 is therefore based on the problem of creating an implementation that allows a simple test of the cable connected to the implementation while increasing the security and reducing the parts required for this. Here, standard plugs and end closure fittings should be able to be connected to the bushing without great effort.

Dieses Problem wird mit den Maßnahmen des Anspruchs 1 gelöst.This problem is solved with the measures of claim 1.

Mit der Erfindung wird im angegebenen Anwendungsfall erreicht, daß durch eine geringe räumliche Vergrößerung der Durchführung ein seitlicher Adapter eingebracht wird, dessen Innenleiter einerseits mit dem stromführenden Innenleiter der Durchführung auf einfache Weise und elektrisch dicht verbunden werden kann und andererseits einen Anschluß für die Prüfung des Kabels vorsieht. Mit der Adapteranordnung an der Durchführung ist nunmehr auch eine eindeutige Zuordnung zum jeweiligen Kabel sichergestellt.With the invention in the specified application it is achieved that a lateral adapter is introduced by a small spatial enlargement of the bushing, the inner conductor of which can be connected on the one hand to the current-carrying inner conductor of the bushing in a simple and electrically tight manner and on the other hand a connection for testing the cable provides. With the adapter arrangement on the bushing, a clear assignment to the respective cable is now also ensured.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 13 angegeben.Advantageous embodiments of the invention are specified in claims 2 to 13.

Ein Ausführungsbeispiel der Erfindung wird anhand der Figuren 1 bis 4 erläutert. Es zeigen

Fig. 1
die Durchführung mit einem verschlossenen Adapter in Seitenansicht und teilweise im Schnitt
Fig. 2
eine weitere Ausführung der Durchführung mit verschlossenem Adapter, in Seitenansicht und teilweise im Schnitt
Fig. 3
die Durchführung mit einem eingeschraubten Kabelprüfanschluß in Seitenansicht und teilweise im Schnitt
Fig. 4
diese Durchführung mit einem eingeschraubten Verschlußstopfen, in Seitenansicht und teilweise im Schnitt.
An embodiment of the invention is explained with reference to Figures 1 to 4. Show it
Fig. 1
the implementation with a sealed adapter in side view and partly in section
Fig. 2
a further embodiment of the implementation with a closed adapter, in side view and partly in section
Fig. 3
the implementation with a screwed cable test connection in side view and partly in section
Fig. 4
this implementation with a screwed plug, in side view and partly in section.

Nach Fig. 1 ist ein Geräteanschlußteil 1 mit seinem Befestigungsflansch 2 an einer Schaltanlage 17 befestigt. An dem Befestigungsflansch 2 schließt sich ein Abschnitt 4 an, der vorwiegend zylindrisch ausgebildet ist. In Verlängerung dieses Abschnitts 4 ist ein konischer Abschnitt 3 angeordnet, der zum Anschluß eines Steckers oder einer Kabelgarnitur (nicht dargestellt) dient. Ein als Durchführungsbolzen ausgebildeter und stromführender Innenleiter 5 ist axial im Geräteanschlußteil 1 eingesetzt. Im Abschnitt 4 befindet sich eine seitliche öffnung 6, die der Aufnahme eines Adapters 7 dient. Dieser Adapter 7 enthält einen Innenleiter 8, der als Gewindeansatzbolzen 12,13,14 ausgebildet ist. An den Ansatz 12 des Gewindeansatzbolzens schließen sich einerseits ein Außengewindeteil 13 und andererseits ein Innengewindeteil 14 an. Um den Gewindeansatzbolzen 12,13,14 fachgerecht im Adapter 7 unterbringen zu können, besitzt der Adapter 7 einen Boden 10 mit einer axialen Bohrung 11, die so beschaffen ist, daß der Ansatz 12 des Gewindeansatzbolzens 12,13,14 einen festen Sitz im Boden 10 des Adapters 7 hat. Das Außengewindeteil 13 greift in eine Gewindesacklochbohrung 9 des stromführenden Innenleiters 5 ein, während daß Innengewindeteil 14, das den gleichen Innendurchmesser wie den Außendurchmesser des Außengewindeteils 13 aufweist, der Aufnahme eines Außengewindes 16 eines Isolierpfropfens 15 dient. Die seitliche öffnung 6 des Geräteanschlußteils 1 weist eine sacklochartige Form 19 auf, die im Bereich des Ansatzes 12 in eine axiale Bohrung 20 übergeht. Die Gestaltung des Adapters 7 als hohler Konus bringt es mit sich, daß das Innengewindeteil 14 ebenfalls eine an den Innenkonus des Adapters 7 angepaßte außenkonische Form 21 aufweist.1, a device connection part 1 is fastened with its fastening flange 2 to a switchgear assembly 17 . A section 4 adjoins the mounting flange 2 and is predominantly cylindrical. In extension of this section 4 , a conical section 3 is arranged, which serves to connect a plug or a cable set (not shown). A current-carrying inner conductor 5 designed as a lead-through bolt is inserted axially in the device connection part 1 . In section 4 there is a lateral opening 6 which serves to accommodate an adapter 7 . This adapter 7 contains an inner conductor 8 , which is designed as a threaded stud bolt 12, 13, 14 . On the one hand, an externally threaded part is connected to the shoulder 12 of the threaded stud bolt 13 and on the other hand an internal thread part 14 . In order to be able to professionally accommodate the threaded stud bolt 12, 13, 14 in the adapter 7 , the adapter 7 has a bottom 10 with an axial bore 11 , which is designed such that the shoulder 12 of the threaded stud bolt 12, 13, 14 has a firm fit in the ground 10 of the adapter 7 has. The external thread part 13 engages in a threaded blind hole 9 of the current-carrying inner conductor 5 , while the internal thread part 14 , which has the same internal diameter as the external diameter of the external thread part 13 , serves to receive an external thread 16 of an insulating plug 15 . The lateral opening 6 of the device connection part 1 has a blind hole-like shape 19 which merges into an axial bore 20 in the region of the extension 12 . The design of the adapter 7 as a hollow cone means that the internal thread part 14 also has an external conical shape 21 which is adapted to the internal cone of the adapter 7 .

Nach Fig. 2 ist der Konus des Adapters 7 bis an den stromführenden Innenleiter 5 des Geräteanschlußteils 1 geführt. Im stromführenden Innenleiter 5 ist eine durchgehende Gewindebohrung 22 eingebracht, um das verlängerte Außengewindeteil 13 aufnehmen zu können.2, the cone of the adapter 7 is guided up to the current-carrying inner conductor 5 of the device connection part 1 . A continuous threaded bore 22 is made in the current-carrying inner conductor 5 in order to be able to accommodate the elongated external thread part 13 .

Nach Fig. 3 ist ein Doppelkonus 23 als Kabelprüfanschluß in den stromführenden Leiter 5 eingeschraubt. Der Doppelkonus 23 besteht aus Silikonkautschuk und besitzt einen Ansatzbolzen 24 aus Elektrolytkupfer. Der Ansatzbolzen 24 besitzt an der zum stromführenden Innenleiter 5 gewandten Seite ein Gewindeteil 25 und an der vom stromführenden Innenleiter 5 abgewandten Seite ein Gewindeteil 26 zur Aufnahme einer Flügelmutter 27. Der Ansatzbolzen 24 weist einen Mitnahmering 28 auf, der am Ansatzbolzen 24 angedreht und vom Silikon des Doppelkonus 23 umgossen ist.3, a double cone 23 is screwed into the current-carrying conductor 5 as a cable test connection. The double cone 23 is made of silicone rubber and has a shoulder bolt 24 made of electrolytic copper. The shoulder bolt 24 has a threaded part 25 on the side facing the current-carrying inner conductor 5 and a threaded part 26 for receiving a wing nut 27 on the side facing away from the current-carrying inner conductor 5 . The shoulder bolt 24 has a driving ring 28 which is screwed onto the shoulder bolt 24 and is cast by the silicone of the double cone 23 .

Nach Herausnahme des Doppelkonus 23 nach Fig. 3 wird die Öffnung 6 im Geräteanschlußteil 1 durch ein Formteil 29 aus Isolierstoff verschlossen. Dieses Formteil 29 ist in einem Silikonkautschukkonus 30 eingegossen, wobei ein Mitnahmering 31 für das Silikonteil (im Formteil 29 gegossen) vorgesehen ist.After removing the double cone 23 according to FIG. 3, the opening 6 in the device connection part 1 is closed by a molded part 29 made of insulating material. This molded part 29 is cast in a silicone rubber cone 30 , a driving ring 31 being provided for the silicone part (cast in the molded part 29 ).

Claims (13)

  1. Bushing for switching devices insulated by pressure gas with a joining piece suitable for mounting in an enclosure wall of the switching device which has a retaining flange and is terminated with a cone-shaped section, and with a current-carrying inner conductor which is arranged axially in the joining piece, with the distinguishing features that joining piece (1) has a section (4) between retaining flange (2) and cone-shaped section (3) that incorporates a lateral opening (6) extending as far as current-carrying inner conductor (5), and that an adapter (7) can be inserted in this opening (6), whose inner conductor (8) can be connected electrically to current-carrying inner conductor (5) of joining piece (1).
  2. Bushing according to claim 1, with the distinguishing feature that current-carrying inner conductor (5) is designed as a bushing conductor stud with a closed tapped bore (9) in section (4) of joining piece (1), whose axis runs perpendicular to the axis of current-carrying inner conductor (5).
  3. Bushing according to claim 1 or 2, with the distinguishing features that adapter (7) is designed as a hollow cone made from silicone rubber closed at one end, whose base (10) has a bore (11), and that an inner conductor designed as a threaded shoulder bolt (12, 13, 14) is inserted in the cone, whose shoulder (12) has an externally threaded part (13) on the side facing current-carrying inner conductor (5) and an internally threaded part (14) inside the cone.
  4. Bushing according to one of the claims 1 to 3, with the distinguishing feature that adapter (7) can be sealed with an insulating plug (15) that has an external thread (16) at the end facing threaded shoulder bolt (12, 13, 14) corresponding to internal thread (14) of threaded shoulder bolt (12, 13, 14).
  5. Bushing according to one of the claims 1 to 4, with the distinguishing feature that joining piece (1) can be mounted on switching device (17) in such a way that lateral opening (6) in section (4) points in different rotational angular directions.
  6. Bushing according to one of the claims 1 to 5, with the distinguishing feature that section (4) has a lateral protrusion (18) for extending the packed sealing gaps.
  7. Bushing according to one of the claims 1 to 6, with the distinguishing feature that lateral opening (6) in section (4) of joining piece (1) has an internally conical, blind hole design (19) with axial bore (20) for shoulder (12) of threaded shoulder bolt (12, 13, 14) matched to adapter (7).
  8. Bushing according to claim 1, with the distinguishing features that lateral opening (6) in section (4) of joining piece (1) has an internally conical design matching adapter (7) and extending as far as current-carrying inner conductor (5) of joining piece (1), and that threaded bore (22) in current-carrying inner conductor (5) of joining piece (1) is a through-hole.
  9. Bushing according to claim 8, with the distinguishing feature that internally threaded part (14) has an external cone (21) corresponding to the internal cone of adapter (7).
  10. Bushing according to claim 1, with the distinguishing features that adapter (7) is designed as a double cone (23) which encloses a shoulder bolt (24) with a threaded part (25, 26) at either end, one threaded part (25) being suitable for screwing to the internal thread of current-carrying conductor (5) and the other threaded part (26) being fitted with a wing nut (27), and that shoulder bolt (25) inside double cone (23) is reinforced by a driver ring (28) that engages with double cone (23), which is made from silicone rubber.
  11. Bushing according to claim 10, with the distinguishing feature that driver ring (28) is encapsulated by the silicone rubber of double cone (23).
  12. Bushing according to claim 10 or 11, with the distinguishing feature that lateral opening (6) of joining piece (1) can be sealed by a moulding (29) made from insulating material which is encapsulated in a silicone rubber cone (30), whereby moulding (29) is reinforced by a driver ring (31).
  13. Bushing according to one of the claims 1 to 12, with the distinguishing feature that current-carrying conductor (5) of joining piece (1) is embedded in cast resin.
EP91119617A 1990-12-20 1991-11-18 Bushing for switching devices insulated by pressure gas Expired - Lifetime EP0492127B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4040903A DE4040903A1 (en) 1990-12-20 1990-12-20 PERFORMANCE FOR GAS INSULATED SWITCHGEAR
DE4040903 1990-12-20

Publications (3)

Publication Number Publication Date
EP0492127A2 EP0492127A2 (en) 1992-07-01
EP0492127A3 EP0492127A3 (en) 1993-02-24
EP0492127B1 true EP0492127B1 (en) 1995-05-24

Family

ID=6420858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119617A Expired - Lifetime EP0492127B1 (en) 1990-12-20 1991-11-18 Bushing for switching devices insulated by pressure gas

Country Status (3)

Country Link
EP (1) EP0492127B1 (en)
DE (2) DE4040903A1 (en)
ES (1) ES2074634T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105810372A (en) * 2016-04-29 2016-07-27 句容华源电器设备有限公司 Insulating plug capable of measuring humidity

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809358A (en) * 1954-08-31 1957-10-08 Westinghouse Electric Corp Terminal concentric bushing with current transformer
DE1076214B (en) * 1958-11-18 1960-02-25 Liebknecht Transformat Implementation for electrical devices
GB2154382B (en) * 1983-12-14 1988-04-07 Raychem Ltd High voltage connector

Also Published As

Publication number Publication date
ES2074634T3 (en) 1995-09-16
EP0492127A3 (en) 1993-02-24
DE4040903A1 (en) 1992-06-25
DE59105585D1 (en) 1995-06-29
EP0492127A2 (en) 1992-07-01

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