EP0152718B1 - Trennschalter für metallgekapselte, druckgasisolierte Hochspannungsschaltanlagen - Google Patents

Trennschalter für metallgekapselte, druckgasisolierte Hochspannungsschaltanlagen Download PDF

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Publication number
EP0152718B1
EP0152718B1 EP84730137A EP84730137A EP0152718B1 EP 0152718 B1 EP0152718 B1 EP 0152718B1 EP 84730137 A EP84730137 A EP 84730137A EP 84730137 A EP84730137 A EP 84730137A EP 0152718 B1 EP0152718 B1 EP 0152718B1
Authority
EP
European Patent Office
Prior art keywords
strips
isolating switch
isolating
switching
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.)
Expired
Application number
EP84730137A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0152718A1 (de
Inventor
Winfried Dr.-Ing. Schulz
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0152718A1 publication Critical patent/EP0152718A1/de
Application granted granted Critical
Publication of EP0152718B1 publication Critical patent/EP0152718B1/de
Expired 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
    • H01H33/16—Impedances connected with contacts
    • H01H33/165—Details concerning the impedances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/034—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being formed as coating or mould without outer sheath
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/148—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals embracing or surrounding the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors

Definitions

  • the invention relates to a disconnector for metal-encapsulated, compressed gas-insulated high-voltage switchgear with cylindrical contact pieces, which are designed as field electrodes or are surrounded by them, a movable insulating tube arranged within a contact piece or a field electrode, which essentially bridges the separation distance between the contact pieces during switching, as long as the contact pieces are moved, and two lying on the longitudinal axis, each electrically connected or connectable to one of the contact pieces, approximately the same size, movable resistors, which have a thermally highly conductive ceramic carrier, the outer dimension of which is smaller than the inner diameter of the insulating tube, and which at Beginning of the switching movement are introduced into the isolating section and, after at least largely bridging the isolating section through the insulating tube, also bypassing it before the opposing contact pieces come into contact with one another changed or brought with the field electrodes.
  • a flashover arc can only form between the two different resistors and the damping effect of the resistors prevents the occurrence of high-frequency vibrations.
  • the flashover arc cannot migrate to the encapsulation and thus trigger an earth short-circuit because it is shielded from the insulating tube that covers the separation distance. Since the resistors are exposed to the effects of the flashover arc and the associated heating, they have a thermally highly conductive ceramic carrier.
  • the invention has for its object to construct the resistors connected to the disconnector so that they have the required resistance values with a small volume and a high voltage and temperature resistance.
  • each resistor is composed of a plurality of elements which are spaced apart from one another between two metal contact disks on the end face, each element consists of a ceramic plate which bears burned-in strips of resistance material, which on each of the contact disks facing the contact disk, opposite edges of the plate end, and the resistor is cast in hardened resin so that the contact disks can be contacted from the outside.
  • the construction of the resistor from several parallel plates with the burned-in resistor coverings, which are arranged in a narrow space, but at a distance from each other, does not only result in the possibility of adapting the resistance values to the desired order of magnitude of 500-5000 ohms due to the electrical parallel connection , which essentially results from the downstream line capacities, but you also get a variety of cooling surfaces.
  • the heating that occurs suddenly during switching as a result of the flashover arc can be dissipated quickly via the ceramic carrier and the casting resin to the outer surface of the resistor.
  • the resistance therefore has a high thermal strength. Since the surface consists of the casting resin except for the metallic surfaces required for electrical contacting, there is also a high resistance to the possible chemical decomposition products of the insulating gas, in particular SF ⁇ , since the hardened casting resin is resistant to hydrofluoric acid.
  • the strips of resistance material can only be provided on one side of the plate or on both sides on both sides of the plate. It is advisable to arrange the strips in a meandering or zigzag pattern in order to accommodate the longest possible resistance band in a small area. Strips arranged on both sides of the plates, it is expedient that they run congruently and at the points where the strips end at the lateral edges, the front and rear side strips are connected to one another by metal. This results in a clear parallel connection of the strips on both sides already on the plate.
  • FIG. 1 shows, schematically represented, a longitudinal section through a disconnector designed according to the invention.
  • a resistor used in this circuit breaker is shown in perspective view, partially in section.
  • Figure 3 shows one of the plates from which the resistor is composed, in supervision.
  • insulated metal-enclosed high-voltage system contains a circuit breaker 1, which is within the metallic grounded enclosure 2. It is shown in FIG. 1 in a switch position in which the flashover arc 3 occurs.
  • the isolating switch 1 has two coaxial, opposing cylindrical field electrodes 4 and 5, between which there is the isolating section 6, which is indicated by the arrows and which is exposed when the isolating switch 1 is in the switched-off position.
  • a movable contact piece 7 in the form of a contact tube is arranged in the interior of the right field electrode 5 and is galvanically connected to the field electrode 5 via a sliding contact 8 and thus has the same potential as this.
  • a movable insulating tube 9 Inside the fixed left field electrode 4 is a movable insulating tube 9, the outer diameter of which is smaller than the diameter of the edge 10 of the opening of the field electrode 4.
  • both the resistors 12 and the insulating tube 9 and the movable contact piece 7 lie inside the field electrodes 4, 5 and thus do not protrude into the isolating section 6.
  • the electric field within the isolating section 6 is thus dependent on the shape of the field electrodes 4, 5 and is not disturbed by the internal parts.
  • the insulating tube 9 is first moved out of the field electrode 4 into the isolating path with the aid of a drive (not shown) until it reaches an end position which is at a distance 13 from the opposite field electrode 5, as indicated by arrows. This distance 13 is chosen so large that no sliding sparks can arise on the surface of the insulating tube 9.
  • the two resistors 12 are introduced symmetrically from both sides into the separating section 6.
  • the remaining separating section 14 remaining between their end faces lies in the middle of the separating section 6. If this remaining separating section 14 has become sufficiently small, it occurs the flashover arc 3 between the two resistors 12.
  • a migration of the flashover arc 3 to the metallic encapsulation 2 is not possible since it is shielded by the insulating tube 9.
  • the symmetrical damping given by the resistors 12 when the pre-flashover arc 3 is ignited or re-ignited prevents the occurrence of high-frequency vibrations or attenuates them strongly.
  • the movable contact piece 7 is brought into contact with the field electrode 4 and the insulating tube 9 is also withdrawn again.
  • the conduction of the operating current thus takes place when the isolating switch 1 is in the closed position from the field electrode 4 via the movable contact piece 7 to the field electrode 5, so that the current heat can be released to the outside unhindered.
  • the isolating switch 1 is opened, the movements of the individual parts run in reverse order, so that the switch-off arcs, which re-ignite several times, are again between the slowly moving resistors 12.
  • Each resistor 12 is composed of several elements 16.
  • Each element 16 consists of a rectangular plate 17 made of thermally highly conductive ceramic, for. B. from AI 2 0 3 , and strips 18 of pasty resistance material are baked on their two surfaces.
  • the burned-in strips 18 run in a zigzag shape from one edge 19 of the plate to the opposite edge 20. Since the strips 18 are congruent on both surfaces of the plate 17, they are metal-contacted at the points where they touch the edges 19, 20 21 connected to each other, so they are connected in parallel.
  • a further metal contact 22 of a larger area is provided, which in each case extends to the front edges 23 of the plate 17.
  • a plurality of elements 16 are arranged side by side at a distance from one another between two end-face metallic contact disks 24 made of copper.
  • the contact disks 24 are provided on one side with parallel slots 25 into which the front edges 23 of the plates 17 engage, so that there is electrical contact between the metal contacts 22 at the end of the strips 18 and the contact disks 24. All elements 16 are thus also electrically connected in parallel.
  • the entire arrangement is then in hardened casting resin 26, for. B. epoxy, poured in that the resistor 12 forms a cylinder. In this case, an outer surface of the contact disks 25 is left free to establish the electrical connection between the rods 11 and the resistors 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP84730137A 1984-02-16 1984-12-10 Trennschalter für metallgekapselte, druckgasisolierte Hochspannungsschaltanlagen Expired EP0152718B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3405850 1984-02-16
DE19843405850 DE3405850A1 (de) 1984-02-16 1984-02-16 Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen

Publications (2)

Publication Number Publication Date
EP0152718A1 EP0152718A1 (de) 1985-08-28
EP0152718B1 true EP0152718B1 (de) 1987-04-15

Family

ID=6228103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730137A Expired EP0152718B1 (de) 1984-02-16 1984-12-10 Trennschalter für metallgekapselte, druckgasisolierte Hochspannungsschaltanlagen

Country Status (7)

Country Link
US (1) US4623767A (enExample)
EP (1) EP0152718B1 (enExample)
JP (1) JPS60189123A (enExample)
BR (1) BR8500678A (enExample)
CA (1) CA1260046A (enExample)
DE (2) DE3405850A1 (enExample)
SU (1) SU1327805A3 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622365B2 (ja) * 1985-11-22 1994-03-23 日新電機株式会社 ガス絶縁装置
CH693051A5 (de) * 1995-06-09 2003-01-31 Rockwell Automation Ag Widerstandsanordnung zu einem zum Schalten von kapazitiven Lasten bestimmten elektromagnetischen Schaltgerät.
DE19543815A1 (de) * 1995-11-24 1997-05-28 Asea Brown Boveri Elektrisches Schaltgerät
FR2753833B1 (fr) * 1996-09-20 1998-10-23 Disjoncteur de generateur avec resistance d'amortissement variable
EP1973133A3 (en) * 2007-03-22 2009-11-11 Korea Electro Technology Research Institute Circuit breaker using arc contact

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136965A1 (de) * 1983-09-01 1985-04-10 Siemens Aktiengesellschaft Trennschalter für metallgekapselte, druckgasisolierte Hochspannungschaltanlagen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR478423A (fr) * 1914-04-24 1915-12-10 Georges Giles Interrupteur à l'air libre à résistances
DE822690C (de) * 1949-11-08 1951-11-26 Theodor Conrad Schaltstift fuer elektrische Wechselstromschalter
GB672519A (en) 1950-08-01 1952-05-21 Vickers Electrical Co Ltd Improvements in precision electric resistor devices
CA678008A (en) * 1960-02-05 1964-01-14 Westinghouse Electric Corporation Circuit interrupters
DE1216972B (de) * 1960-07-25 1966-05-18 Siemens Ag Elektrischer Widerstand fuer hohe Impulslasten
US3143622A (en) * 1960-10-28 1964-08-04 Westinghouse Electric Corp Arc-extinguishing unit and contact structure for a circuit interrupter
GB1314388A (en) 1970-07-13 1973-04-18 Fasterr Transformers Ltd Resistors
US3858147A (en) 1972-12-14 1974-12-31 R Caddock Non-inductive film-type cylindrical resistor
US3829707A (en) 1973-02-09 1974-08-13 Allis Chalmers Gas insulated high voltage electrical transmission line with means for damping transients
DE2704389C3 (de) * 1977-01-31 1980-06-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Trennschalter für metallgekapselte Hochspannungsschaltanlagen
CH660817A5 (de) 1982-03-26 1987-06-15 Bbc Brown Boveri & Cie Anordnung zum schutz von gasisolierten, gekapselten schaltanlagen gegen hochfrequente spannungswanderwellen.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136965A1 (de) * 1983-09-01 1985-04-10 Siemens Aktiengesellschaft Trennschalter für metallgekapselte, druckgasisolierte Hochspannungschaltanlagen

Also Published As

Publication number Publication date
DE3463197D1 (en) 1987-05-21
JPH0447935B2 (enExample) 1992-08-05
US4623767A (en) 1986-11-18
CA1260046A (en) 1989-09-26
DE3405850A1 (de) 1985-08-29
EP0152718A1 (de) 1985-08-28
JPS60189123A (ja) 1985-09-26
SU1327805A3 (ru) 1987-07-30
BR8500678A (pt) 1985-10-01

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