EP0513945B1 - Switch-chamber for a metal-clad air blast switch - Google Patents

Switch-chamber for a metal-clad air blast switch Download PDF

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Publication number
EP0513945B1
EP0513945B1 EP92250095A EP92250095A EP0513945B1 EP 0513945 B1 EP0513945 B1 EP 0513945B1 EP 92250095 A EP92250095 A EP 92250095A EP 92250095 A EP92250095 A EP 92250095A EP 0513945 B1 EP0513945 B1 EP 0513945B1
Authority
EP
European Patent Office
Prior art keywords
insulating tube
switch
elements
field
chamber
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
EP92250095A
Other languages
German (de)
French (fr)
Other versions
EP0513945A1 (en
Inventor
Thomas Kelch
Manfred Meinherz
Annette Wandel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0513945A1 publication Critical patent/EP0513945A1/en
Application granted granted Critical
Publication of EP0513945B1 publication Critical patent/EP0513945B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the invention is in the field of electrical circuit breakers and can be used in the structural design of a switching chamber, as is used in metal-encapsulated gas pressure switches.
  • the actual contact system in a switching chamber, the housing of which essentially consists of an insulating tube surrounding the contact system with field control elements axially adjacent to the insulating tube and a current supply element assigned to each field control element consists.
  • the switching chamber is arranged axially in a tubular metal encapsulation and provided with a drive device arranged coaxially thereto for the axially displaceable contact element of the contact system.
  • the contact elements of the contact system are fixed or mounted on the power supply elements.
  • the insulating tube of the switching chamber is generally made of a resin-impregnated fabric web and centered at its ends in the field control elements and radially glued there to these field control elements.
  • the manufacturing measures required for this arrangement and design of the insulating tube are relatively complex (DE 32 40 774, DE 39 04 147).
  • the invention has for its object to design the housing of the switching chamber so that it is easy to manufacture and easy to align with the adjacent parts of the circuit breaker, in particular with respect to the power supply elements.
  • the insulating tube consists of cast resin and is provided at one end with an inner flange and at its other end with an outer flange and that annular metallic pressure elements are provided for fixing the insulating tube to the power supply elements which the pressure element assigned to the outer flange also serves as a field control element.
  • the insulating tube can be axially screwed to the current supply elements by means of the pressure rings, the pressure rings pressing the respective flange of the insulating tube against a corresponding surface of the adjacent field control element or the current supply element.
  • No cast-in metal bushings are required in the flanges of the cast resin tube, which could result in warping of the cast resin tube when cooling in the mold.
  • this configuration avoids dielectric problems that could occur when dirt parts are deposited at the connection points of different pipe parts.
  • the pressure rings used in the invention can - if necessary - be given such an outer contour that they also perform a field-controlling function.
  • FIG. 1 shows the metal housing 1 of a single-pole compressed gas circuit breaker, in its tubular housing part a switching chamber 2 is arranged axially.
  • An essential part of this switching chamber is formed by the insulating tube 3, which is made of cast resin and, according to the cutouts in FIGS. 2 and 3, is provided with an inner flange 4 at its left end and with an outer flange 5 at its right end.
  • the insulating tube 3 is connected to the power supply element 6.
  • a pressure ring 7 is used, which is placed against the inner flange 4 from the inside and screwed to the power supply element 6.
  • the insulating tube 3 is connected to the current supply element 8, which in its section 9 adjoining the insulating tube has a field-controlling function.
  • a flange 10 is provided, on which the outer flange 5 of the insulating tube 3 abuts, the insulating tube being fastened to the section 9 by means of a screw connection by means of the pressure ring 11.
  • the pressure ring 11 has such an outer contour that it also exerts a field-controlling effect.
  • the power supply element 8 is fixed to an inner flange of the metal housing 1 via an insulating tube 12 and thus carries the entire switching chamber 2.

Landscapes

  • Insulators (AREA)
  • Push-Button Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Circuit Breakers (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

In a switch chamber for a metal-encapsulated gas-blast circuit breaker the intention is to produce a connection which is simple in production-engineering terms between the insulating tube (3) and the adjacent field-control elements (11). For this purpose, the insulating tube (3) consists of cast resin and is provided at its one end with an inner flange (4) and at its other end with an outer flange (5). In order to fix the insulating tube (3) on the power supply elements (8) of the switch chamber (2), annular metallic pressure elements (7, 11) are provided of which the pressure element (11) allocated to the outer flange is used at the same time as a field-control element. <IMAGE>

Description

Die Erfindung liegt auf dem Gebiet der elektrischen Leistungsschalter und ist bei der konstruktiven Ausgestaltung einer Schaltkammer anzuwenden, wie sie bei metallgekapselten Druckgasschaltern verwendet wird.The invention is in the field of electrical circuit breakers and can be used in the structural design of a switching chamber, as is used in metal-encapsulated gas pressure switches.

Um in Druckgas-Leistungsschaltern die beim Schaltvorgang auftretenden Gasströme kontrolliert handhaben zu können, ist es üblich, das eigentliche Kontaktsystem in einer Schaltkammer anzuordnen, deren Gehäuse im wesentlichen aus einem das Kontaktsystem umgebenden Isolierrohr mit axial an das Isolierrohr angrenzenden Feldsteuerelementen und einem jedem Feldsteuerelement zugeordneten Stromzuführungselement besteht. Bei einem bekannten Druckgasschalter dieser Art ist die Schaltkammer axial in einer rohrartigen Metallkapselung angeordnet und mit einer koaxial dazu angeordneten Antriebseinrichtung für das axial verschiebbare Kontaktelement des Kontaksystems versehen. Die Kontaktelemente des Kontaktsystems sind dabei an den Stromzuführungselementen fixiert bzw. gelagert. Unabhängig von der Ausgestaltung dieses Kontaktsystems ist das Isolierrohr der Schaltkammer in aller Regel aus einer harzgetränkten Gewebebahn gefertigt und an seinen Enden in den Feldsteuerelementen zentriert und dort mit diesen Feldsteuerelementen radial verklebt. Die für diese Anordnung und Ausgestaltung des Isolierrohres erforderlichen fertigungstechnischen Maßnahmen sind relativ aufwendig (DE 32 40 774, DE 39 04 147).In order to be able to handle the gas flows occurring during the switching process in a compressed gas circuit breaker, it is customary to arrange the actual contact system in a switching chamber, the housing of which essentially consists of an insulating tube surrounding the contact system with field control elements axially adjacent to the insulating tube and a current supply element assigned to each field control element consists. In a known gas pressure switch of this type, the switching chamber is arranged axially in a tubular metal encapsulation and provided with a drive device arranged coaxially thereto for the axially displaceable contact element of the contact system. The contact elements of the contact system are fixed or mounted on the power supply elements. Regardless of the design of this contact system, the insulating tube of the switching chamber is generally made of a resin-impregnated fabric web and centered at its ends in the field control elements and radially glued there to these field control elements. The manufacturing measures required for this arrangement and design of the insulating tube are relatively complex (DE 32 40 774, DE 39 04 147).

Ausgehend von einer Schaltkammer mit den Merkmalen des Oberbegriffes des Schutzanspruches 1,hergeleleitet von der den nächstkommenden Stand der Technik beschreibenden DE-A- 39 04 147, liegt der Erfindung die Aufgabe zugrunde, das Gehäuse der Schaltkammer so auszugestalten, daß es einfach herstellbar und leicht gegenüber den angrenzenden Teilen des Leistungsschalters, insbesondere gegenüber den Stromzuführungselementen, ausrichtbar ist.Starting from a switching chamber with the features of the preamble of protection claim 1, derived from DE-A-39 04 147, which describes the closest prior art, the invention has for its object to design the housing of the switching chamber so that it is easy to manufacture and easy to align with the adjacent parts of the circuit breaker, in particular with respect to the power supply elements.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß das Isolierrohr aus Gießharz besteht und an seinem einen Ende mit einem Innenflansch und an seinem anderen Ende mit einem Außenflansch versehen ist und daß zur Fixierung des Isolierrohres an den Stromzuführungselementen ringförmige metallische Andruckelemente vorgesehen sind, von denen das dem Außenflansch zugeordnete Andruckelement zugleich als Feldsteuerelement dient.To achieve this object it is provided according to the invention that the insulating tube consists of cast resin and is provided at one end with an inner flange and at its other end with an outer flange and that annular metallic pressure elements are provided for fixing the insulating tube to the power supply elements which the pressure element assigned to the outer flange also serves as a field control element.

Bei einer derartigen Ausgestaltung der Schaltkammer kann man mittels der Andruckringe das Isolierrohr axial mit den Stromzuführungselementen verschrauben, wobei die Andruckringe den jeweiligen Flansch des Isolierrohres gegen eine entsprechende Fläche des angrenzenden Feldsteuerelementes bzw. des Stromzuführungselementes pressen. Dadurch entfällt die Schwierigkeit, mehrere Rohrstücke axial zueinander auszurichten und aneinander zu befestigen. In den Flanschen des Gießharzrohres sind auch keine eingegossenen Metallbuchsen erforderlich, die ein Verziehen des Gießharzrohres beim Abkühlen in der Gußform zur Folge haben könnten. Weiterhin werden durch diese Ausgestaltung dielektrische Probleme vermieden, die bei der Ablagerung von Schmutzteilen an den Verbindungsstellen verschiedener Rohrteile auftreten könnten. - Den im Rahmen der Erfindung verwendeten Andruckringen kann - soweit erforderlich - eine solche Außenkontur gegeben werden, daß sie zugleich eine feldsteuernde Funktion wahrnehmen.In such a configuration of the switching chamber, the insulating tube can be axially screwed to the current supply elements by means of the pressure rings, the pressure rings pressing the respective flange of the insulating tube against a corresponding surface of the adjacent field control element or the current supply element. This eliminates the difficulty of aligning several pipe sections axially to one another and fastening them to one another. No cast-in metal bushings are required in the flanges of the cast resin tube, which could result in warping of the cast resin tube when cooling in the mold. Furthermore, this configuration avoids dielectric problems that could occur when dirt parts are deposited at the connection points of different pipe parts. - The pressure rings used in the invention can - if necessary - be given such an outer contour that they also perform a field-controlling function.

Ein Ausführungsbeispiel der neuen Schaltkammer ist in den Figuren 1 bis 3 dargestellt.An embodiment of the new switching chamber is shown in Figures 1 to 3.

Die Figur 1 zeigt das Metallgehäuse 1 eines einpoligen Druckgas-Leistungsschalters, in dessem rohrförmigen Gehäuseteil eine Schaltkammer 2 axial angeordnet ist. Einen wesentlichen Teil dieser Schaltkammer bildet das Isolierrohr 3, das aus Gießharz besteht und gemäß den Ausschnittsdarstellungen in den Figuren 2 und 3 an seinem linken Ende mit einem Innenflansch 4 und an seinem rechten Ende mit einem Außenflansch 5 versehen ist. Am linken Ende ist das Isolierrohr 3 mit dem Stromzuführungselement 6 verbunden. Hierzu dient ein Andruckring 7, der von innen gegen den Innenflansch 4 gesetzt und mit dem Stromzuführungselement 6 verschraubt ist.FIG. 1 shows the metal housing 1 of a single-pole compressed gas circuit breaker, in its tubular housing part a switching chamber 2 is arranged axially. An essential part of this switching chamber is formed by the insulating tube 3, which is made of cast resin and, according to the cutouts in FIGS. 2 and 3, is provided with an inner flange 4 at its left end and with an outer flange 5 at its right end. At the left end, the insulating tube 3 is connected to the power supply element 6. For this purpose, a pressure ring 7 is used, which is placed against the inner flange 4 from the inside and screwed to the power supply element 6.

Am rechten Ende ist das Isolierrohr 3 mit dem Stromzuführungselement 8 verbunden, das in seinem an das Isolierrohr angrenzenden Abschnitt 9 feldsteuernde Funktion ausübt. Am linken Ende des Abschnittes 9 ist ein Flansch 10 vorgesehen, an dem der Außenflansch 5 des Isolierrohres 3 anliegt, wobei das Isolierrohr mit Hilfe des Andruckringes 11 an dem Abschnitt 9 durch eine Schraubverbindung befestigt ist. Der Andruckring 11 hat eine solche Außenkontur, daß er zugleich feldsteuernde Wirkung ausübt.At the right end, the insulating tube 3 is connected to the current supply element 8, which in its section 9 adjoining the insulating tube has a field-controlling function. At the left end of section 9, a flange 10 is provided, on which the outer flange 5 of the insulating tube 3 abuts, the insulating tube being fastened to the section 9 by means of a screw connection by means of the pressure ring 11. The pressure ring 11 has such an outer contour that it also exerts a field-controlling effect.

Das Stromzuführungselement 8 ist über ein Isolierrohr 12 an einem Innenflansch des Metallgehäuses 1 fixiert und trägt somit die gesamte Schaltkammer 2.The power supply element 8 is fixed to an inner flange of the metal housing 1 via an insulating tube 12 and thus carries the entire switching chamber 2.

Claims (1)

  1. Switch-chamber (2) for a gas-blast circuit-breaker which, in a tubular metal cladding (1), comprises a contact system disposed axially or parallel to the axis and a drive device disposed coaxially thereto, for the axially displaceable contact element of the contact system, the casing of the switch-chamber consisting of an insulating tube (3) which surrounds the contact system and field-control elements axially adjacent to the insulating tube and a power supply element (6, 8) being associated to each field-control element for fastening or mounting each contact element of the contact system, characterized in that the insulating tube (3) consists of cast resin and is provided at one of its ends with an inner flange (4) and at its other end with an outer flange (5) and in that, for fastening the insulating tube (3) at the power supply elements (6, 8), annular metallic pressure elements (7, 11) are provided, the pressure element (11) associated to the outer flange (5), at the same time serving as field-control element.
EP92250095A 1991-05-17 1992-04-24 Switch-chamber for a metal-clad air blast switch Expired - Lifetime EP0513945B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9106309U 1991-05-17
DE9106309U DE9106309U1 (en) 1991-05-17 1991-05-17

Publications (2)

Publication Number Publication Date
EP0513945A1 EP0513945A1 (en) 1992-11-19
EP0513945B1 true EP0513945B1 (en) 1994-12-14

Family

ID=6867563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250095A Expired - Lifetime EP0513945B1 (en) 1991-05-17 1992-04-24 Switch-chamber for a metal-clad air blast switch

Country Status (5)

Country Link
EP (1) EP0513945B1 (en)
AT (1) ATE115766T1 (en)
DE (2) DE9106309U1 (en)
DK (1) DK0513945T3 (en)
ES (1) ES2067294T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005090A1 (en) * 2010-01-15 2011-07-21 Siemens Aktiengesellschaft, 80333 Switching chamber for a circuit breaker and circuit breaker with switching chamber

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10345657B4 (en) * 2003-09-25 2005-08-18 Siemens Ag switching chamber
DE102005017902A1 (en) * 2005-04-18 2006-10-19 Abb Technology Ag Switch-disconnector and switchgear with switch-disconnector
FR2906931B1 (en) 2006-10-09 2009-07-17 Areva T & D Sa CUTTING CHAMBER WITH CYLINDER FIELD DISTRIBUTION FOR HIGH VOLTAGE OR MEDIUM VOLTAGE CIRCUIT BREAKERS

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240774A1 (en) * 1982-11-02 1983-05-26 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka High-voltage switch chamber
DE3540474A1 (en) * 1985-11-12 1987-05-14 Siemens Ag Electrical gas-blast circuit breaker
DE3904148A1 (en) * 1989-02-07 1990-08-09 Siemens Ag METAL-ENCLOSED COMPRESSED GAS CIRCUIT BREAKER WITH A SHIFT ROD
DE3904147A1 (en) * 1989-02-07 1990-08-09 Siemens Ag Metal-encapsulated, gas-blast power circuit breaker (power switch) having rings which are used for field control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005090A1 (en) * 2010-01-15 2011-07-21 Siemens Aktiengesellschaft, 80333 Switching chamber for a circuit breaker and circuit breaker with switching chamber

Also Published As

Publication number Publication date
ATE115766T1 (en) 1994-12-15
DE59200944D1 (en) 1995-01-26
DK0513945T3 (en) 1995-05-15
ES2067294T3 (en) 1995-03-16
DE9106309U1 (en) 1992-09-17
EP0513945A1 (en) 1992-11-19

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