EP0306439B1 - Interrupteur électrique à gaz comprimé - Google Patents

Interrupteur électrique à gaz comprimé Download PDF

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Publication number
EP0306439B1
EP0306439B1 EP88730185A EP88730185A EP0306439B1 EP 0306439 B1 EP0306439 B1 EP 0306439B1 EP 88730185 A EP88730185 A EP 88730185A EP 88730185 A EP88730185 A EP 88730185A EP 0306439 B1 EP0306439 B1 EP 0306439B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
blast
cylinder head
diameter
base
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
EP88730185A
Other languages
German (de)
English (en)
Other versions
EP0306439A1 (fr
Inventor
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0306439A1 publication Critical patent/EP0306439A1/fr
Application granted granted Critical
Publication of EP0306439B1 publication Critical patent/EP0306439B1/fr
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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to an electric pressure gas switch with a fixed contact and a moving contact and with a blowing device, consisting of a fixed blowing piston and a moving blowing cylinder made of insulating material, the cylinder bottom of which is formed by a disk-shaped extension of the moving contact, and in which the connection between the cylinder base and the blowing cylinder via cylindrical parts fastened in radial bores in the cylinder base, which protrude into round passage openings of the same diameter in the blowing cylinder.
  • cylindrical pins are used, which lie in radially directed bores of the cylinder base and protrude into corresponding round through openings of the same diameter in the blow cylinder.
  • These cylinder pins are also fixed in the cylinder base by further pins perpendicular to them.
  • This known attachment is relatively expensive due to the pinning of the actual retaining pins.
  • the outer end face of the retaining pins is adapted to the curvature of the blow cylinder and these do not protrude beyond the surface of the blow cylinder.
  • the retaining pins have sharp edges, there is a high local field strength, which results in a deterioration in the dielectric conditions.
  • FR-A-2 174 838 shows a push-through screw ("boulon 10") with which the blow cylinder wall 6 is screwed to an actuating part ("organe d'êtment 11").
  • the invention has for its object to simplify the attachment of the blow cylinder on the cylinder bottom and improve dielectric.
  • each hole contains two countersinks, of which the outer one with the larger diameter, corresponding to the diameter of the cylinder head, as depth has only a part of the height of the cylinder head, and the cylinder head passes through the passage openings of the blow cylinder.
  • the standardized cylinder head screw with hexagon socket screwed into the cylinder base is precisely defined in its radial position by the external countersink and protrudes by a certain part of the height of its head over the outer edge of the cylinder base. This part penetrates the round opening in the blow cylinder and thus acts like a precisely positioned holding pin that transfers the forces from the cylinder base to the blow cylinder and thus absorbs the dynamic stresses when switching.
  • the exact positioning of the Cylinder head screw achieves precise alignment and mounting of the blowing cylinder, which is usually made of very thin walls for weight reasons and is made of an insulating material, in particular a hard tissue. This is further improved if the diameter of the external countersink to the diameter of the cylinder head results in a sliding or transition fit.
  • FIG. 1 shows a schematically simplified illustration of the longitudinal section (according to section line I - I in FIG. 2) of an electrical pressure gas switch with a blowing device, which assumes the switch-off position to the right of the center line and the switch-on position to the left.
  • Figure 2 shows the section along the section line II - II in Figure 1.
  • Figure 3 shows a section of a detail of Figure 2 on an enlarged scale.
  • the switching chamber 1 contains the fixed switching piece 3 at its upper end (not shown).
  • the associated moving switching piece 4 carries a disk-shaped extension which forms the cylinder base 6 to which the blowing cylinder 5 made of insulating material is fastened.
  • the blow cylinder 5 and the movable contact piece 4 are actuated together by coupling rods 7, which transmit the movement of a drive, not shown.
  • the upper ends of the coupling rods 7 pass through a passage opening 8 in Cylinder base 6 and are connected by a radially arranged plug pin 9 to the cylinder base 6, which bears against the inner wall 10 of the blow cylinder 5.
  • the movable switching element 4 slides on a guide tube 11.
  • a nozzle body 12 is provided on the end face of the blowing cylinder 5 facing the fixed switching element 4. This delimits an annular gap 14 for guiding the extinguishing gas with the contact tip 13 of the movable contact 4.
  • the blowing cylinder 5 slides over the fixed piston 15, the upper end face 16 of which is at the same height as the upper end face 17 of the guide tube 11.
  • the piston 15 is supported with a plurality of rods 18 in a manner not shown, on a gear housing, also not shown, located under the porcelain switching vessel 2, which carries the porcelain switching vessel 2 with the switching chamber 1 and contains the drive for the movable switching element 4 and the blowing cylinder 5.
  • the thin-walled blowing cylinder made of insulating material is fastened to the cylinder base 6 with the aid of standardized cylinder head screws 19 with a hexagon socket. These are screwed into radial bores 20 in the cylinder base 6 (see FIG. 3).
  • Each bore 20 contains two counterbores 21, 22, of which the outer counterbore 21 has a larger diameter 23, indicated by arrows, which corresponds to the diameter of the cylinder head 24 and results in a sliding or transition fit.
  • the depth 25 of the outer countersink 21, also indicated by arrows, is only a part of the height 26 of the cylinder head 24. In this way, the standardized cylinder head screw 19 is fixed and positioned exactly in the radial bore 20 of the cylinder base 6.
  • the screw-in length of the cylinder head screw 19 is dimensioned with the aid of the second countersink 22 of the bore 20, that on the one hand it is clearly sufficient for power transmission and on the other hand results in the greatest possible extension length of the cylinder head screw 19, as a result of which its fastening in the cylinder base 6 is given good security against loosening.
  • the screw-in length can be selected independently of the standardized thread height on the cylinder head screw 19.
  • round passage openings 27 are provided, the diameter of which corresponds to the diameter 23 of the outer countersink 21, corresponding to the number of cylinder head screws 19, which are distributed uniformly along the circumference of the cylinder base 6. Since the cylinder heads 24 of the cylinder head screw 19 each protrude beyond the outer circumference of the cylinder base 6, they penetrate the round passage openings 27 of the blow cylinder 5 and carry this in a precisely fixed manner. The rounded edges 28 of the cylinder head 24 result in a favorable dielectric field distribution.

Landscapes

  • Circuit Breakers (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (3)

1. Interrupteur électrique à gaz comprimé comportant une pièce de contact fixe (3) et une pièce de contact mobile (4), et un dispositif de soufflage constitué par un piston de soufflage fixe (15) et un cylindre de soufflage mobile (5) réalisé en matière isolante et dont le fond (6) est formé par un appendice saillant en forme de rondelle de la pièce de contact mobile (4), et dans lequel la liaison entre le fond (6) du cylindre et le cylindre de soufflage (5) est réalisée au moyen de pièces cylindriques qui sont fixées dans des perçages radiaux (20), ménagés dans le fond (6) du cylindre, et pénètrent dans des ouvertures circulaires de passage (27) de même diamètre ménagées dans le cylindre de soufflage (5), caractérisé par le fait qu'on utilise, comme pièces cylindriques, des vis normalisées à tête cylindrique (19) à six pans creux, qui sont vissées dans les perçages (20) ménagés dans le fond (6) du cylindre, que chaque perçage (20) contient respectivement deux chanfreins (21,22), parmi lesquels le fraisage extérieur possède le plus grand diamètre (23), qui correspond au diamètre de la tête (24) du cylindre et, en tant que profondeur (25), seulement une fraction de la hauteur (26) de la tête (24) du cylindre, et que la tête (24) du cylindre traverse les ouvertures de passage (27) du cylindre de soufflage (5).
2. Interrupteur électrique à gaz comprimé suivant la revendication 1, caractérisé par le fait que le diamètre (23) du chanfrein extérieur (21) réalise un ajustement à glissement ou un ajustement de jonction avec le diamètre de la tête (24) du cylindre.
3. Interrupteur électrique à gaz comprimé suivant la revendication 1 ou 2, caractérisé par le fait qu'il est prévu un nombre pair de vis à têtes cylindriques (19), qui sont réparties uniformément le long du pourtour du cylindre de soufflage (5) et sont disposées respectivement en vis-à- vis par couples.
EP88730185A 1987-09-01 1988-08-17 Interrupteur électrique à gaz comprimé Expired - Lifetime EP0306439B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8711961U 1987-09-01
DE8711961U DE8711961U1 (fr) 1987-09-01 1987-09-01

Publications (2)

Publication Number Publication Date
EP0306439A1 EP0306439A1 (fr) 1989-03-08
EP0306439B1 true EP0306439B1 (fr) 1992-07-15

Family

ID=6811727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730185A Expired - Lifetime EP0306439B1 (fr) 1987-09-01 1988-08-17 Interrupteur électrique à gaz comprimé

Country Status (2)

Country Link
EP (1) EP0306439B1 (fr)
DE (2) DE8711961U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103119A1 (de) * 1991-01-31 1992-08-06 Siemens Ag Druckgasschalter
DE19522581C1 (de) * 1995-06-16 1996-09-19 Siemens Ag Elektrischer Druckgas-Leistungsschalter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588407A (en) * 1967-07-31 1971-06-28 Westinghouse Electric Corp Puffer piston gas blast circuit interrupter with insulating nozzle member and valve acting hollow contacts
DE1913969C3 (de) * 1969-03-14 1980-05-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Hochspannungs-Leistungsschalter
DE2211617C3 (de) * 1972-03-07 1981-02-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Druckgasschalter

Also Published As

Publication number Publication date
DE3872802D1 (de) 1992-08-20
DE8711961U1 (fr) 1988-12-29
EP0306439A1 (fr) 1989-03-08

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