EP0051556A1 - Kontaktanordnung für Druckgasschalter mit einem rohrförmigen Bauelement aus ferromagnetischem Material - Google Patents

Kontaktanordnung für Druckgasschalter mit einem rohrförmigen Bauelement aus ferromagnetischem Material Download PDF

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Publication number
EP0051556A1
EP0051556A1 EP81730111A EP81730111A EP0051556A1 EP 0051556 A1 EP0051556 A1 EP 0051556A1 EP 81730111 A EP81730111 A EP 81730111A EP 81730111 A EP81730111 A EP 81730111A EP 0051556 A1 EP0051556 A1 EP 0051556A1
Authority
EP
European Patent Office
Prior art keywords
tubular component
tubular
conical
interior
contact
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.)
Withdrawn
Application number
EP81730111A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rüdiger Dr. rer. nat. Hess
Heiner Marin
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
Original Assignee
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
Priority claimed from DE19803041083 external-priority patent/DE3041083A1/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0051556A1 publication Critical patent/EP0051556A1/de
Withdrawn legal-status Critical Current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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/185—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7053—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having a bridging element around two hollow tubular contacts

Definitions

  • the invention relates to a contact arrangement for pressure gas switches, in which a tubular contact piece and a contact piece axially associated therewith are provided, between which an arc is drawn when switched off under load, which is blown by a compressed gas flow, the tubular contact piece having a nozzle body on the end face from the end face of the conically widening contour of the nozzle opening and in its interior a tubular component made of ferromagnetic material, the inner surface of which is conical and continues the contour of the nozzle opening.
  • the tubular component made of ferromagnetic material improves the arc behavior and thus increases the switching capacity. It has now been shown that a considerable erosion can occur on the ferromagnetic material, although the arc base points on this material move rapidly.
  • the invention is based on the tasks of reducing this burn-up and thereby further increasing the switching capacity of the compressed gas switch or increasing its service life.
  • this object is achieved in that the tubular component carries a layer of graphite on its surface facing the interior. In this way, the high resistance of graphite be used against erosion while maintaining the magnetic effect of the tubular component. Another advantage is the elimination of the dusty combustion products observed so far.
  • the tubular component can be provided with the layer of graphite in an advantageous manner by using a bushing with a cylindrical outer surface and a conical inner surface.
  • a further development of this idea allows a plurality of bushings with a gradually increasing outer diameter to be inserted into corresponding recesses of the tubular component and to limit a continuously expanding interior.
  • bushings of the aforementioned type can also be produced with the required properties.
  • FIG. 1 shows a section of a contact system for a pressure gas switch designed as a blow piston switch.
  • the contact system consists of two fixed contact pieces 1 and 2 arranged on a common axis, which bear nozzle bodies 3 and 4 made of graphite on their mutually facing end faces.
  • the two contact pieces 1 and 2 are bridged by a tubular bridging switching piece 5, which encloses a plurality of spring-loaded contact fingers 6 which are distributed over the circumference of the contact pieces 1 and 2.
  • a blow cylinder 8 is simultaneously moved with the tubular bypass switching element 5.
  • the compressed gas is compressed, which is located in the inner space 9 delimited by the blow cylinder 8 and the essentially fixedly arranged piston 10.
  • the inner lateral surface 12 of the tubular component 11 is conical and is adapted to the contour of the nozzle bodies 3 and 4 in such a way that the conical contour of the nozzle openings 3b and 4b, widening from the end face 3a or 4a of the nozzle bodies 3 and 4, extends from the contour of the tubular component 11 is continued.
  • the tubular component 11 is fixed in its position by a screw connection 14 with the contact piece 1, the tubular component 11 and the nozzle body 3 and 4 being connected to one another in an electrically conductive manner by the contact piece 1 and 2 are.
  • the nozzle body 3 or 4 and the tubular component 11 sits on an electrically conducting annular body 15 which is screwed to the contact piece. 1
  • the contact arrangement is provided with two tubular components 11 of identical design.
  • FIG. 1 also shows, I have a layer 20 of graphite on the inside of the conical tubular components 11.
  • the structure of this graphite layer is explained below with reference to FIG. 2.
  • a tubular component 21 is shown enlarged as a detail, specifically in accordance with the design of the component 11 in the upper part of FIG. 1.
  • the graphite layer 20 is formed by a total of three bushings, which together form a continuous conical inner surface.
  • the socket 22 has a smaller outside diameter d1 than the bush 23 and this in turn has a smaller outer diameter d2 than the bush 24 (d3).
  • the tubular component 21 is provided with stepped cylindrical recesses 25, 26 and 27.
  • the conical inner surface with a continuously increasing diameter can be formed in that the bushes 22, 23 and 24 (upper part of FIG. 2) are provided with a corresponding inner shape as individual parts during their manufacture.
  • bushes 30, 31 and 32 can also be used which have a uniform wall thickness, ie also have cylindrical openings in the interior.
  • a stepped interior corresponding to the recesses 25, 26 and 27 for receiving the bushings is initially created within the tubular component 21.
  • the conical inner shape is then machined, eg. B. turning, manufactured, whereby a jump or stepless transition between the bushings 30 and 31 or 31 and 32 is ensured.
  • the bushings can be fastened in the tubular component by being pressed in with the aid of a hydraulic press.
  • the same result, namely a press fit, can also be done by shrinking the bushings in a known manner.
  • the joining of the parts is facilitated by heating or cooling. After the temperature has been equalized, the parts are firmly seated one inside the other.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP81730111A 1980-10-30 1981-10-20 Kontaktanordnung für Druckgasschalter mit einem rohrförmigen Bauelement aus ferromagnetischem Material Withdrawn EP0051556A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3041083 1980-10-30
DE19803041083 DE3041083A1 (de) 1978-11-02 1980-10-30 Kontaktanordnung fuer druckgasschalter mit einem rohrfoermigen bauelement aus ferromagnetischem material

Publications (1)

Publication Number Publication Date
EP0051556A1 true EP0051556A1 (de) 1982-05-12

Family

ID=6115670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730111A Withdrawn EP0051556A1 (de) 1980-10-30 1981-10-20 Kontaktanordnung für Druckgasschalter mit einem rohrförmigen Bauelement aus ferromagnetischem Material

Country Status (5)

Country Link
US (1) US4418255A (no)
EP (1) EP0051556A1 (no)
JP (1) JPS57107525A (no)
BR (1) BR8106987A (no)
DE (1) DE8029069U1 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743665A2 (de) * 1995-05-13 1996-11-20 Abb Research Ltd. Leistungsschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE352853T1 (de) * 2003-12-19 2007-02-15 Abb Technology Ag Gasisolierte schaltovrrichtung mit einer düse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234067A1 (de) * 1972-07-07 1974-01-17 Siemens Ag Druckgasisoliertes hochspannungsschaltgeraet
DE2644421A1 (de) * 1976-09-30 1978-04-06 Siemens Ag Kontaktsystem fuer hochspannungsleistungsschalter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835274A (en) * 1972-06-20 1974-09-10 Siemens Ag Contact system for a high-voltage circuit breaker
DE2626245C3 (de) * 1976-06-10 1982-12-09 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung für Druckgasschalter
DE2847808C2 (de) * 1978-11-02 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung für Druckgasschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234067A1 (de) * 1972-07-07 1974-01-17 Siemens Ag Druckgasisoliertes hochspannungsschaltgeraet
DE2644421A1 (de) * 1976-09-30 1978-04-06 Siemens Ag Kontaktsystem fuer hochspannungsleistungsschalter
FR2366680A1 (fr) * 1976-09-30 1978-04-28 Siemens Ag Systeme de contacts a pression accrue pour disjoncteurs a haute tension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743665A2 (de) * 1995-05-13 1996-11-20 Abb Research Ltd. Leistungsschalter
EP0743665A3 (de) * 1995-05-13 1998-04-22 Abb Research Ltd. Leistungsschalter

Also Published As

Publication number Publication date
DE8029069U1 (de) 1988-05-26
US4418255A (en) 1983-11-29
BR8106987A (pt) 1982-07-13
JPS57107525A (en) 1982-07-05

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811021

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840420

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HESS, RUEDIGER, DR. RER. NAT.

Inventor name: MARIN, HEINER