EP0029482A1 - Interrupteur à gaz comprimé - Google Patents

Interrupteur à gaz comprimé Download PDF

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Publication number
EP0029482A1
EP0029482A1 EP80104260A EP80104260A EP0029482A1 EP 0029482 A1 EP0029482 A1 EP 0029482A1 EP 80104260 A EP80104260 A EP 80104260A EP 80104260 A EP80104260 A EP 80104260A EP 0029482 A1 EP0029482 A1 EP 0029482A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
switch
push rod
stroke
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.)
Granted
Application number
EP80104260A
Other languages
German (de)
English (en)
Other versions
EP0029482B1 (fr
Inventor
Johann Blatter
Walter Schaad
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh 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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to AT80104260T priority Critical patent/ATE2764T1/de
Publication of EP0029482A1 publication Critical patent/EP0029482A1/fr
Application granted granted Critical
Publication of EP0029482B1 publication Critical patent/EP0029482B1/fr
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
    • H01H33/88—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 a gas pressure switch with a movable contact piece fastened to the end of a push rod, which can be brought into and out of engagement with a stationary contact piece, and with a blowing nozzle which gives the free end of the movable contact piece and is fastened to the push rod.
  • a gas pressure switch with a movable contact piece fastened to the end of a push rod, which can be brought into and out of engagement with a stationary contact piece, and with a blowing nozzle which gives the free end of the movable contact piece and is fastened to the push rod.
  • a pump chamber containing extinguishing gas and enclosed by a cylinder, which can be pressurized in the course of a switch-off stroke, the cylinder being displaceably guided on a stationary supported piston.
  • Such switches are known and, thanks to their simple design (stationary supported pistons), have also proven themselves, especially since the cylinder can also serve as a movable nominal current contact, which can serve in and out of engagement with a corresponding, stationary counter contact.
  • the cylinder itself is fastened to the push rod via a flange or via the blowing nozzle, ie with the movable one Contact piece connected, which means that considerable masses must be accelerated, especially at the beginning of the switch-off stroke. This in turn requires a very powerful switch drive.
  • the proposed gas pressure switch according to the invention is characterized in that the blowing nozzle is designed as the bottom of a second piston opposite the first piston, which can be displaced relative to the cylinder in this between two end positions, means being provided around the cylinder during a switch-off stroke in the same direction as the movable contact piece, but to move a smaller distance than this.
  • the means for moving the cylinder in the same direction as the movable contact piece during a switch-off stroke, but for moving a smaller distance can be designed in the simplest embodiment as a drag connection between the blow nozzle designed as a piston and the cylinder itself.
  • This towing connection can have two stops which are arranged at a distance from one another in the cylinder and which fix the end positions of the blowing nozzle with respect to the cylinder, which can be biased in the direction of the switch-off stroke by means of a spring.
  • This spring which is tightened more during the switch-on stroke, also serves as an energy accumulator that supports the drive.
  • the cylinder can also be coupled via a gearbox (lever, friction wheel or gearwheel gearbox) to the push rod which moves the movable contact piece and the blowing nozzle, which gearbox has a reducing effect in the direction of the cylinder.
  • a gearbox lever, friction wheel or gearwheel gearbox
  • the movement of the cylinder with respect to that of the push rod remains well defined in every phase of the switch-off stroke.
  • the pressure gas switch 10 shown is shown in the left half of FIGS. 1-3 in the on position, in the right half in the off position, functionally corresponding components being identified by the same reference numerals.
  • An electrically conductive support 11 carries a tubular insulating housing 12, only partially shown, in which the essential components of the switch are arranged and which contains an extinguishing gas under pressure, for example SF 6 .
  • a pin-shaped contact piece 14 attached to the free end of a push rod 13 is in and out of engagement with a tubular, stationary by means of a drive, not shown, which moves the push rod 13 either in the direction of arrow 15 (switch-off stroke) or arrow 16 (switch-on stroke) arranged contact piece 17 can be brought.
  • a blowing nozzle 18 is fastened by means not shown, which surrounds the movable contact piece 14 with its nozzle space 19 and is in front of it with its narrowest point 20.
  • the inlets 21 of the blowing nozzle 18 are directly connected to a pump chamber 22.
  • the circumference of the pump chamber 22 is delimited by a cylinder 23, which in turn is slidably guided on a pump piston 24.
  • the pump piston 24 is firmly supported on the support 11 by means of several (at least two) columns 25.
  • the blowing nozzle 18 is also slidably mounted in the cylinder 23 and thus also acts as a piston.
  • a first stop 26 and a second stop 27 is formed on the inside of the cylinder 23 at the upper end thereof. These stops are intended to cooperate with the peripheral flange 28 of the blowing nozzle 18 and thus determine the extent of the relative movement of the blowing nozzle 18 in the cylinder 23. These stops 26, 27, together with the peripheral flange 28, form an effective towing connection between the push rod 13 and the cylinder 23.
  • the cylinder 23 is biased in the direction of the switch-off stroke, and the springs 21 act as a force accumulator, which is coupled to the push rod 13 via the cylinder 23, the stop 26, the peripheral flange 28 and supports the drive at least at the beginning of the switch-off movement and for acceleration of the movable contact piece 14 contributes.
  • the movable contact piece moves during the switch-off stroke 14 and with it the blowing nozzle 18 away from the fixed contact piece 17.
  • the cylinder 23 also moves away from the fixed contact piece, but only until the stop 27 comes to rest on the stationary piston 24. Then the cylinder 23 stops, the peripheral flange 28 detaches from the stop 26, and now the blowing nozzle, which now acts as a piston, displaces the extinguishing gas from the remaining pump chamber until the position shown in FIG. 1 on the right is reached.
  • the cylinder 23 has traveled a shorter distance than the switching stroke by the distance indicated by the dimensional arrow 31.
  • the cylinder 23 initially stops and is only raised when the peripheral flange 28 of the blowing nozzle 18 strikes the stop 26, the compression springs 29 then being tensioned again.
  • FIG. 1 While, as mentioned, in FIG. 1 the cylinder 23 is coupled to the push rod 13 via a towing connection, a gear is provided for this coupling in FIGS. 2 and 3, namely a force-locking in FIG. 2 and in FIG. 3 a positive gear.
  • bulges 33 are formed on the circumferentially longitudinally extending sides with an outwardly convex cross section, which are each arranged opposite one of the columns 25 supporting the piston 24.
  • the number of beads 33 (four are shown, but it could just as well be two or three) are attached to the inside of the cylinder 23 in its lower region pairs of inwardly extending bearing plates 34, the bearing plates 34 of a pair each encompassing a column 25 with play.
  • Two pairs of smooth bevel gears 35, 36 are rotatably mounted on a pin 37 on each pair of bearing plates.
  • the two bevel gears 35, 36 of a pair are arranged facing each other with their smaller diameters.
  • the bevel gear 35 is firmly seated on the pin 37 rotatably mounted in the bearing plates 34, while the bevel gear 36 is freely rotatable on the pin 37.
  • the pin 37 extending beyond the bevel gear 36 is under the action of a compression spring 38, so that the bevel gears 35, 36 are resiliently biased toward one another.
  • the bevel gears 35, 36 roll on the one hand on the assigned, stationary column 25, on the other hand on the bead 33 formed on the push rod 13 and thus also act as rolling contacts between the push rod 13 and the relevant column 25, that is, between the movable one Contact piece 14 and the support 11.
  • the stop 27 can also be provided in this embodiment — as indicated by dashed lines — via which the cylinder 23 is then by means of the peripheral flange 28 and under Ueberwin Extension of the frictional connection between the columns 25 and the push rod 13 on the one hand and the bevel gears 35, 36 on the other hand is pressed into its lowest position at the end of the switch-off stroke.
  • a toothed rack 39 is attached to the stationary columns 25 and a toothed rack 40 is also attached to the sides of the push rod 13 opposite the columns 25.
  • bearing brackets 41 are fastened to the inside of the cylinder, in each of which a gear 42 meshing both with the rack 39 and with the rack 40 is freely rotatable.
  • the mode of operation of this embodiment largely corresponds to that of the embodiment according to FIG. 2 with the difference already mentioned that the coupling between the push rod 13 and the cylinder 23 is slip-free.
  • springs can also be provided in the embodiments of FIGS. 2 and 3, which load the cylinder 23 in the direction of the switch-off stroke, and thus also serve as an energy store supporting the switch drive.

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Glass Compositions (AREA)
  • Vehicle Body Suspensions (AREA)
EP80104260A 1979-11-22 1980-07-19 Interrupteur à gaz comprimé Expired EP0029482B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104260T ATE2764T1 (de) 1979-11-22 1980-07-19 Druckgasschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1041379A CH642481A5 (de) 1979-11-22 1979-11-22 Druckgasschalter.
CH10413/79 1979-11-22

Publications (2)

Publication Number Publication Date
EP0029482A1 true EP0029482A1 (fr) 1981-06-03
EP0029482B1 EP0029482B1 (fr) 1983-03-09

Family

ID=4362958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104260A Expired EP0029482B1 (fr) 1979-11-22 1980-07-19 Interrupteur à gaz comprimé

Country Status (6)

Country Link
US (1) US4379958A (fr)
EP (1) EP0029482B1 (fr)
JP (1) JPS5686421A (fr)
AT (1) ATE2764T1 (fr)
CH (1) CH642481A5 (fr)
DE (1) DE3062280D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0999569A3 (fr) * 1998-11-02 2002-09-18 ABB Schweiz AG Interrupteur de puissance

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658745A5 (de) * 1982-10-25 1986-11-28 Sprecher & Schuh Ag Druckgasschalter.
DE3322597A1 (de) * 1983-05-31 1984-12-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216407B (de) * 1960-05-27 1966-05-12 Calor Emag Elektrizitaets Ag Elektrischer Schalter mit selbsterzeugter Loeschmittel-, insbesondere Druckgasstroemung
CH517371A (de) * 1970-06-24 1971-12-31 Bbc Brown Boveri & Cie Elektrischer Kompressionsschalter
FR2226740A1 (fr) * 1973-04-17 1974-11-15 Hitachi Ltd
DE2336684A1 (de) * 1973-07-19 1975-01-30 Bbc Brown Boveri & Cie Druckgasschalter
FR2346841A1 (fr) * 1976-03-30 1977-10-28 Merlin Gerin Structure d'un interrupteur electrique d'autosoufflage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524886A (de) * 1970-12-01 1972-06-30 Bbc Brown Boveri & Cie Elektrischer Kompressionsschalter
JPS5913816B2 (ja) * 1975-05-29 1984-04-02 三菱電機株式会社 開閉器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216407B (de) * 1960-05-27 1966-05-12 Calor Emag Elektrizitaets Ag Elektrischer Schalter mit selbsterzeugter Loeschmittel-, insbesondere Druckgasstroemung
CH517371A (de) * 1970-06-24 1971-12-31 Bbc Brown Boveri & Cie Elektrischer Kompressionsschalter
FR2226740A1 (fr) * 1973-04-17 1974-11-15 Hitachi Ltd
DE2336684A1 (de) * 1973-07-19 1975-01-30 Bbc Brown Boveri & Cie Druckgasschalter
FR2346841A1 (fr) * 1976-03-30 1977-10-28 Merlin Gerin Structure d'un interrupteur electrique d'autosoufflage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0999569A3 (fr) * 1998-11-02 2002-09-18 ABB Schweiz AG Interrupteur de puissance

Also Published As

Publication number Publication date
CH642481A5 (de) 1984-04-13
JPS5686421A (en) 1981-07-14
US4379958A (en) 1983-04-12
EP0029482B1 (fr) 1983-03-09
ATE2764T1 (de) 1983-03-15
JPH0154813B2 (fr) 1989-11-21
DE3062280D1 (en) 1983-04-14

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