EP0221838B1 - Druckgasschalter - Google Patents

Druckgasschalter Download PDF

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Publication number
EP0221838B1
EP0221838B1 EP86730151A EP86730151A EP0221838B1 EP 0221838 B1 EP0221838 B1 EP 0221838B1 EP 86730151 A EP86730151 A EP 86730151A EP 86730151 A EP86730151 A EP 86730151A EP 0221838 B1 EP0221838 B1 EP 0221838B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
blast circuit
breaker according
gas blast
section
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
EP86730151A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0221838A1 (de
Inventor
Helmut Ing. Beier (Grad.)
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
Priority to AT86730151T priority Critical patent/ATE43935T1/de
Publication of EP0221838A1 publication Critical patent/EP0221838A1/de
Application granted granted Critical
Publication of EP0221838B1 publication Critical patent/EP0221838B1/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
    • H01H33/70—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 an electrical pressure gas switch with a separating section formed by two fixed contact pieces and an insulating tube which at least temporarily surrounds this and has jacket-side passage openings for distributing the extinguishing gas flowing into the separating section.
  • Such an electrical pressure gas switch is such. B. from DE-C 26 47 643 known.
  • the isolating section is surrounded by a thin-walled insulating material tube during the switch-off movement, the jacket-side passage openings for the extinguishing gas are formed, for example, by rectangular slots which run azimuthally to the insulating material tube and are separated from one another by axially and azimuthally extending webs.
  • the webs are thermally stressed from the inside of the insulating tube by an arc drawn during the switch-off and also when using arc-resistant materials, such as. B. PTFE, mechanically weakened by the inevitable erosion, so that the stability of the insulating tube can be reduced.
  • the invention has for its object to increase the mechanical stability of the insulating tube with a comparable cost of materials in an electrical pressure gas switch of the type mentioned and to improve the electrical strength of the pipe wall facing the arc.
  • the insulating tube is grooved on the inside and outside, and in that the inner and outer grooves intersect one another and are provided with such a depth that they penetrate one another at the crossing points, forming the through openings.
  • a relatively rigid and torsionally rigid rib body is created with ribs arranged essentially in two different cylinder planes.
  • This rib body can have the same amount of material as a thin-walled tube.
  • the design increases the resilience and thus the service life of the insulating tube under static and dynamic stresses, particularly when stressed by the switching movement and the gas pressure.
  • the service life can also be increased under the thermal stress of the burning arc, since material degradation caused by normal burn-up does not reduce the stability of the rib body. Stability is maintained because only the inner surfaces closest to the arc are thermally stressed and not the entire insulating tube is stressed.
  • the electrical strength is increased by the constructive design according to the invention, because the insulating material and the insulating or extinguishing gas alternate several times in the axial direction.
  • a plurality of inner grooves running azimuthally in different radial planes are provided. If the inner groove is designed as a circumferential annular groove in a radial plane, as in a further embodiment of the invention, the extinguishing gas flow does not fan out at any point on the circumference after entering the separating section, but is concentrated in a disk shape. In this way, the penetration depth of the turbulent gas masses into the separation zone is increased, which results in better cooling of the arc drawn in the separation zone. In addition, there are no web connections on the surface facing the arc in the axial direction, which could increase the conductivity of the insulating material body after the arc quenching, thus increasing the tracking resistance in the invention.
  • An advantageous exemplary embodiment of the invention has a plurality of axially extending, preferably axially continuous, external grooves, as a result of which simple manufacture of the insulating tube can be achieved. If, as is provided in a further preferred exemplary embodiment of the invention, the outer grooves are distributed uniformly over the circumference, the passage openings can be arranged both axially and azimuthally evenly on the insulating tube jacket. This results in a turbulent gas flow that cools the arc evenly in the blowing area.
  • the insulating material body provided in the known is expensive. It is usually manufactured by sintering and thus as a special component with a configuration that makes it difficult to use inexpensive semi-finished products.
  • the inflow cross section formed from all passage openings is larger than the outflow cross section formed by the two nozzle-shaped switching pieces.
  • the inflow cross section is preferably 1.3 to 1.7 times the outflow cross section. This measure has a favorable influence on the extinguishing conditions during a shutdown.
  • FIG. 1 shows schematically in a section the parts of a compressed gas switch required for understanding the invention.
  • FIG. 2 shows a section along the section line 11-11 in FIG. 1.
  • the compressed gas switch shown in Fig. 1 has two axially congruent switching pieces 1, 2, which limit a separation distance T at the end and which is nozzle-shaped with a for discharging extinguishing gas Outflow cross section of a total of two cross-sectional area A are formed.
  • the switching pieces 1 and 2 are bridged in an electrically conductive manner by a bridging switching piece 3, which is moved axially by a drive (not shown further).
  • the drive controls a blowing cylinder 4 in the same direction, which cooperates with an almost stationary piston 5.
  • Gas, in particular sulfur hexafluoride, contained in a Kohlben cylinder space 6 between the piston 5 and the blowing cylinder 4 is compressed in the course of the switch-off action by the movement of the blowing cylinder 4 and is guided into the separating distance T via an insulating tube 7 which is connected to the bypass switching element 3 and the blow cylinder 4 is firmly connected.
  • the insulating tube 7 is in the switch-on position outside the isolating section T. In the course of the switch-off operation, it runs from the switching element 1 in the direction of the switching element 2 and surrounds the isolating segment T.
  • the insulating tube 7 is grooved inside and outside. It has circumferential inner grooves 8, which are evenly distributed over the length of the insulating tube 7, and a plurality of axially extending outer grooves 9. These are continuous and are evenly distributed over the circumference of the insulating tube.
  • the inner grooves 8 and the outer grooves 9 cross each other and are provided with a depth such that they penetrate at the crossing points, through openings 10 being formed. The gas compressed in the piston-cylinder space 6 flows through these passage openings 10 in the course of the switch-off movement against an arc drawn between the switching pieces 1 and 2 or 3, which is thereby cooled.
  • An inner surface formed by the inner grooves 8 and inner groove webs 11 is thermally stressed by the drawn arc, but the support function and the electrical strength can be maintained for a relatively long time.
  • External groove webs 12 delimited by the external grooves 9 are not influenced by the arc and are therefore able to maintain their support function even under a comparatively strong arc effect on the inner surface.
  • the sum of all through openings 10 forms the inflow cross section of the extinguishing gas into the separation zone.
  • the inflow cross section is 1.3 times the outflow cross section 2A. This measure results in a further increase in the blowing pressure after the passage openings 10 closest to the bypass switching element 3 are released, so that the extinguishing gas flow is increased and its duration is lengthened due to the delayed reduction in blowing pressure.
  • the separating section is also rapidly deionized by means of the extinguishing gas flowing through the outflow cross-section 2A, so that rapid electrical reconsolidation of the separating section is achieved.
  • the insulating tube 7 provided in the invention is resistant to bending and torsion despite its comparatively low cost of materials. It therefore withstands the mechanical (static and dynamic) and thermal stresses that occur in modern compressed gas circuit breakers with a long service life.
  • Favorable extinguishing conditions are achieved by designing the inflow cross section in relation to the outflow cross section 2A.

Landscapes

  • Circuit Breakers (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP86730151A 1985-10-29 1986-10-03 Druckgasschalter Expired EP0221838B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86730151T ATE43935T1 (de) 1985-10-29 1986-10-03 Druckgasschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853538955 DE3538955A1 (de) 1985-10-29 1985-10-29 Druckgasschalter
DE3538955 1985-10-29

Publications (2)

Publication Number Publication Date
EP0221838A1 EP0221838A1 (de) 1987-05-13
EP0221838B1 true EP0221838B1 (de) 1989-06-07

Family

ID=6285044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730151A Expired EP0221838B1 (de) 1985-10-29 1986-10-03 Druckgasschalter

Country Status (6)

Country Link
US (1) US4678878A (enrdf_load_stackoverflow)
EP (1) EP0221838B1 (enrdf_load_stackoverflow)
JP (1) JPS62103930A (enrdf_load_stackoverflow)
AT (1) ATE43935T1 (enrdf_load_stackoverflow)
DE (3) DE3538955A1 (enrdf_load_stackoverflow)
IN (1) IN165415B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922991A1 (de) * 1988-07-14 1990-01-18 Siemens Ag Elektrischer druckgasschalter
FR2665571B1 (fr) * 1990-08-01 1992-10-16 Merlin Gerin Disjoncteur electrique a arc tournant et a autoexpansion.
DE4427163A1 (de) * 1994-08-01 1996-02-08 Abb Management Ag Druckgasschalter
DE19522581C1 (de) * 1995-06-16 1996-09-19 Siemens Ag Elektrischer Druckgas-Leistungsschalter
DE10249614B3 (de) * 2002-10-21 2004-05-19 Siemens Ag Isolierstoffgehäuse mit Rippenkontur
DE102009020152B3 (de) * 2009-05-06 2010-12-23 Siemens Aktiengesellschaft Isolierstoffgehäuse zur Aufnahme einer Vakuumschaltröhre und feststoffisolierter Schalterpol

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2647643C2 (de) * 1976-10-19 1981-10-15 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
GB2080626B (en) * 1980-07-16 1984-08-08 Aei Circuit interrupters
DE3430306C2 (de) * 1984-08-15 1987-03-12 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Elektrischer Druckgasleistungssschalter

Also Published As

Publication number Publication date
US4678878A (en) 1987-07-07
EP0221838A1 (de) 1987-05-13
DE8531024U1 (de) 1988-12-01
DE3538955A1 (de) 1987-05-07
DE3663870D1 (en) 1989-07-13
JPS62103930A (ja) 1987-05-14
JPH0472334B2 (enrdf_load_stackoverflow) 1992-11-18
IN165415B (enrdf_load_stackoverflow) 1989-10-14
ATE43935T1 (de) 1989-06-15

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