EP0029085B1 - Druckgasschalter - Google Patents

Druckgasschalter Download PDF

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Publication number
EP0029085B1
EP0029085B1 EP80104261A EP80104261A EP0029085B1 EP 0029085 B1 EP0029085 B1 EP 0029085B1 EP 80104261 A EP80104261 A EP 80104261A EP 80104261 A EP80104261 A EP 80104261A EP 0029085 B1 EP0029085 B1 EP 0029085B1
Authority
EP
European Patent Office
Prior art keywords
movable contact
toggle lever
toggle
switch
connecting rod
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
EP80104261A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0029085A1 (de
Inventor
Rudolf Graf
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.)
General Electric 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 AT80104261T priority Critical patent/ATE2704T1/de
Publication of EP0029085A1 publication Critical patent/EP0029085A1/de
Application granted granted Critical
Publication of EP0029085B1 publication Critical patent/EP0029085B1/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
    • H01H33/88—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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact
    • 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
    • H01H33/905—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 compression volume being formed by a movable cylinder and a semi-mobile piston

Definitions

  • the invention relates to a gas pressure switch with a movable contact piece, which is coupled to a drive rod via a translating lever mechanism, and with a blowing nozzle which is movable with and surrounds the movable contact piece and which is connected to a pump cylinder containing an extinguishing gas, which is displaceably guided on a pump piston is, wherein the pump piston is articulated to one end of a first link of a toggle lever in the switched-on position, the second link of which is articulated at a fixed location and whose knee joint is also coupled to the drive rod, so that the toggle lever extends during a switch-off stroke and then kinked again.
  • Such a switch is known for example from DE-B2-1 966 973.
  • the drive rod runs transversely to the direction of displacement of the movable contact piece-blowing nozzle-pump cylinder.
  • This unit is coupled via a rocker arm to the longer arm of an angle lever which can be pivoted on a fixed pin, the shorter arm of which is coupled to the drive rod via a coupling.
  • the toggle lever, to which the pump piston is coupled, is in the switched-on position in a kink position pointing away from the drive rod, and its knee joint is connected to this drive rod via a further coupling.
  • the construction of the known switch entails that on the one hand between the movement of the drive rod and that of the movable contact piece (with blowing nozzle and pump cylinder) there is a practically constant translation given by the length difference of the arms of the angle lever.
  • the drive rod pulls the toggle lever into its extended position right at the beginning of the switch-off stroke, i.e. H. the pump piston moves in the opposite direction to the cylinder right at the beginning of the switch-off stroke, and only after its extended position has been exceeded does it begin to move in the same direction as the pump cylinder.
  • the drive that drives the drive rod must also perform the following work.
  • the movable contact piece and the components that move with it (blow nozzle and cylinder) must be accelerated from a standstill.
  • the gas present in the cylinder has to be compressed right at the beginning, so that somewhat later compressed quenching gas is available for blowing the shaft arc.
  • the aim is that the acceleration of the moving parts should be as high as possible at the beginning of the switch-off stroke, while the compression of the extinguishing gas should not start at the start of the switch-off stroke, since the compressed extinguishing gas is only available at a later point in time of the switch-off stroke has to stand, namely when the increasing distance of the movable contact piece to the fixed contact piece with which it has been engaged approaches the minimum extinguishing distance.
  • the invention is therefore based on the object to provide a switch of the type mentioned, in which the energy to be applied by the drive during a switch-off stroke is as simple as possible, initially for the acceleration of the moving components and only afterwards for compressing the extinguishing gas, that is to say staggered in time is what allows the entire drive to be made smaller.
  • the proposed gas pressure switch according to the invention is characterized in that the lever mechanism has a first coupling, articulated on one end on the knee joint, on the other on the movable contact piece, and a second coupling, which on one end between the ends of the first coupling on this and the other on the Drive rod is articulated, so that at the beginning of the switch-off stroke, the knee position of the knee lever is initially reinforced.
  • the compressed gas switch 10 shown in FIG. 1 has a movable contact point 11 which carries a contact pin 12 at the upper end which can be brought into and out of engagement with a stationary contact piece 13.
  • a blowing nozzle 14 surrounding the contact pin 12 is also fastened to the contact rod 11 by means not shown, which at the same time forms the “bottom” of a pump cylinder 15.
  • the pump cylinder 15 encloses a pump chamber 17 which contains an extinguishing gas, e.g. B. SF 6 contains.
  • a pumping piston 18 is arranged displaceably along the contact rod 11 in the pump cylinder 15 and, as will be shown later, displaces the extinguishing gas from the pump chamber 17 through the blowing nozzle 14 in the course of the switch-off stroke.
  • the inlet 19 of the blowing nozzle 14 therefore communicates directly with the pump chamber 17.
  • a bearing eye 20 is formed, on which the free end of a first link 22 of a toggle lever designated 23 is articulated by means of a pivot pin 21.
  • the knee joint of this toggle lever 23 is provided by a pivot pin 24 to which the second link 25 of the toggle lever 23 is articulated.
  • the free end of the second link 25 is articulated by means of a pivot pin 26 on a bearing eye 27 which is fastened or molded onto a flange part 28 of the switch and is therefore immovable.
  • the flange part 28 also carries a tubular insulator 29 (only partially shown) which encloses a switching chamber in which all of the switch components described so far are encapsulated to the outside.
  • a drive rod 16 extends through the flange part 28 and is axially displaceable by a drive (not shown).
  • a bearing eye 31 is attached or formed, to which one end of a coupling 34 is articulated by means of a pivot pin 33, the other end of which is articulated on the pivot pin 24 of the toggle lever 23.
  • a further coupling 36 is articulated via a further pivot pin 35, the other end of which is articulated approximately centrally in the coupling 34 via a pivot pin 37.
  • the contact pin 12 In the switch-on position shown on the left in FIG. 1, the contact pin 12 is in engagement with the tubular, fixed contact piece 13, which surrounds the contact pin 12 and also keeps the blow nozzle 14 closed at its narrowest point 38.
  • FIG. 2 in which in phase a the switch-on position shown on the left in FIG. 1 is repeated schematically and using the same reference numerals.
  • the drive rod 16 is moved in the direction of the arrow 39.
  • the coupling 36 pulls the coupling 34 downward. Since the pivot pin 24 remains at approximately the same height, the contact rod 11 initially moves approximately twice as fast as the drive rod 16. However, the coupling 34 also transitions into the horizontal position, i. H. presses the toggle lever 23 into an even more pronounced kink position, so that the piston 18 initially moves in the same direction, although not by the same path as the contact rod 11 and thus as the pump cylinder 15.
  • this initial phase of the switch-off stroke there is therefore mainly an acceleration of the contact rod 11 and of the components which move with it.
  • the end of this first phase is reached when the coupling 34 protrudes at right angles from the contact rod 11, that is to say the toggle lever 23 has reached its maximum kink position.
  • the end of this first phase b of the switch-off stroke is shown in FIG. 2.
  • a simplified path-time diagram (St diagram) is shown, with a simplifying assumption that from the beginning (phase a) to the end (phase d) of the switch-off stroke, the drive rod 16 moves linearly with time.
  • the movement the drive rod 16 is therefore shown in Fig. With the solid, straight line.
  • the movement of the contact rod 11 and therefore of the contact pin 12 is shown in Fig. 3 with the dash-dotted curve. It can be seen from this that the contact rod 11 moves considerably faster than the drive rod 16 up to phase c shown in FIG. 2. After the time of phase c, the contact rod 11 moves increasingly faster than the drive rod 16.
  • the dashed curve in FIG. 3 shows the course of movement of the pump piston 18. It can be seen that in the initial phase of the switch-off stroke, i.e. between the times of phases a and b, the pump piston 18 moves in the same direction, albeit less quickly than the drive rod 16 and, above all, as the contact rod 11, while between the times of phases b and c Pump piston 18 moves in opposite directions to the contact rod 11. So while in the initial phase of the switch-off stroke the contact rod 11 is essentially accelerated, the compression of the extinguishing gas takes place mainly between the times of phases b and c. Then the pump piston 18 again moves in the same direction and approximately the same speed as the contact rod 11 and the drive rod 16. Between the phases a, b, c, d of FIG. 2, the directions and the distances by which the drive rod 16, the contact rod 11 and the pump piston 18 are indicated by arrows move during a switch-off stroke.

Landscapes

  • Circuit Breakers (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Glass Compositions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP80104261A 1979-11-16 1980-07-19 Druckgasschalter Expired EP0029085B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104261T ATE2704T1 (de) 1979-11-16 1980-07-19 Druckgasschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1024679A CH642480A5 (de) 1979-11-16 1979-11-16 Druckgasschalter.
CH10246/79 1979-11-16

Publications (2)

Publication Number Publication Date
EP0029085A1 EP0029085A1 (de) 1981-05-27
EP0029085B1 true EP0029085B1 (de) 1983-03-02

Family

ID=4361064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104261A Expired EP0029085B1 (de) 1979-11-16 1980-07-19 Druckgasschalter

Country Status (6)

Country Link
US (1) US4351993A (enrdf_load_stackoverflow)
EP (1) EP0029085B1 (enrdf_load_stackoverflow)
JP (1) JPS5684831A (enrdf_load_stackoverflow)
AT (1) ATE2704T1 (enrdf_load_stackoverflow)
CH (1) CH642480A5 (enrdf_load_stackoverflow)
DE (1) DE3062205D1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* 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.
US5058420A (en) * 1990-04-20 1991-10-22 Hughes Aircraft Company Fiber optic liquid leak detector
FR2906642B1 (fr) * 2006-09-29 2008-12-19 Areva T & D Sa Actionnement par came cylindrique des contacts d'une chambre de coupure a double mouvement.
FR2906929B1 (fr) * 2006-10-09 2009-01-30 Areva T & D Sa Actionnement par des contacts d'une chambre de coupure a double mouvement par un tube isolant
KR20180087745A (ko) * 2017-01-25 2018-08-02 엘에스산전 주식회사 다중 레버를 가진 듀얼 모션 방식의 가스절연 개폐장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1966973B2 (de) * 1969-03-14 1977-04-28 Ausscheidung aus: 19 13 973 Siemens AG, 1000 Berlin und 8000 München Elektrischer schalter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA682313A (en) * 1964-03-17 I-T-E Circuit Breaker Company Puffer operating means for circuit interrupters
NL44779C (enrdf_load_stackoverflow) * 1934-11-27
DE910686C (de) * 1941-03-18 1954-05-06 Aeg Elektrischer Stromunterbrecher, insbesondere Druckgasschalter
DE1023118B (de) * 1952-06-24 1958-01-23 Calor Emag Elektrizitaets Ag Druckmittelbetaetigter elektrischer Schalter
DE1055642B (de) * 1957-02-27 1959-04-23 Sachsenwerk Licht & Kraft Ag Loeschkammerschalter
BE652290A (fr) * 1964-08-26 1965-02-26 Acec Disjoncteur
FR2354625A1 (fr) * 1976-06-10 1978-01-06 Merlin Gerin Interrupteur a autosoufflage
DE2626435A1 (de) * 1976-06-12 1977-12-22 Merlin Gerin Druckgasschalter
CH630744A5 (de) * 1978-09-06 1982-06-30 Sprecher & Schuh Ag Druckgasschalter.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1966973B2 (de) * 1969-03-14 1977-04-28 Ausscheidung aus: 19 13 973 Siemens AG, 1000 Berlin und 8000 München Elektrischer schalter

Also Published As

Publication number Publication date
EP0029085A1 (de) 1981-05-27
ATE2704T1 (de) 1983-03-15
JPS5684831A (en) 1981-07-10
US4351993A (en) 1982-09-28
DE3062205D1 (en) 1983-04-07
JPS637416B2 (enrdf_load_stackoverflow) 1988-02-16
CH642480A5 (de) 1984-04-13

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