EP0374384B1 - Interrupteur monopression à SF6 - Google Patents

Interrupteur monopression à SF6 Download PDF

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Publication number
EP0374384B1
EP0374384B1 EP89117724A EP89117724A EP0374384B1 EP 0374384 B1 EP0374384 B1 EP 0374384B1 EP 89117724 A EP89117724 A EP 89117724A EP 89117724 A EP89117724 A EP 89117724A EP 0374384 B1 EP0374384 B1 EP 0374384B1
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EP
European Patent Office
Prior art keywords
opening
compression
switching
switch
drive 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 - Lifetime
Application number
EP89117724A
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German (de)
English (en)
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EP0374384A3 (fr
EP0374384A2 (fr
Inventor
Herbert Dr.-Ing. Karrenbauer
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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Publication date
Priority claimed from DE19883843406 external-priority patent/DE3843406A1/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0374384A2 publication Critical patent/EP0374384A2/fr
Publication of EP0374384A3 publication Critical patent/EP0374384A3/fr
Application granted granted Critical
Publication of EP0374384B1 publication Critical patent/EP0374384B1/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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • 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
    • H01H2033/908—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 using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the application relates to a SF6 indentation switch with a switching chamber filled with insulating gas, at least two switching elements, at least one of which is movable by a drive rod, a compression device for the insulating gas which can be actuated by this switching movement and whose compression space is delimited by two opposite floors which can be moved relative to one another, described, in which a pressure chamber is arranged between the insulating material nozzle and the bottom facing it, which has an outflow opening that can be closed by a non-return valve in the direction of the switching path, and an inflow opening that can be closed by means of a closing element is arranged in the bottom and a gas storage space connected to the switching path is up to extends to an opening which can be closed by means of the closure element and which opens into the part of the pressure chamber which faces away from the outflow opening, the opening element being in a first position Inflow opening is opened and the opening is closed and in a second position of the closure member the inflow opening is closed and the opening is open and the change in position
  • the invention is therefore based on the object of improving the switch mentioned at the outset in such a way that blowing with cold insulating gas of high density is ensured in all conceivable switching situations.
  • the drive rod is axially displaceable to a limited extent relative to the floor and the pressure chamber, that a ventilation opening is arranged with a valve between the compression chamber and the pressure, that the displacement of the drive rod relative to the floor when the switch is turned on Opening of the valve causes and that the check valve is held in the open position when the switch is turned on.
  • the advantage of the invention is that the compression device sucks in the gas in the pressure chamber each time it is switched on, as a result of which cold quenching gas is sucked in from the switching chamber surrounding the arc quenching device through the nozzle opening.
  • the hot, low-density gas remaining in the pressure chamber after the interruption of a short-circuit current is sucked into the compression device in this way by the subsequent switch-on process, and the cold extinguishing gas flowing in is provided in the pressure chamber for re-blowing the arc.
  • a further advantageous embodiment provides that the opening connecting the gas storage space to the pressure chamber is closed when it is switched on, so that the flow of the fresh gas drawn in is not distributed over the pressure chamber and gas storage space, but rather only and more intensely through the pressure chamber because it is renewed Switching off depends on the fact that there is cold, high-density extinguishing gas and that maximum cooling has been achieved.
  • Fig. 1 shows a first embodiment, the SF6 impression switch is shown in a partial view, in which the essential parts are shown by means of a section extending to the axis of rotation.
  • This exemplary embodiment contains the parts that are customary in an SF6 impression switch: 2 switching pieces 20 and 21, which form a switching path 4 when the switch is opened. Of these contact pieces, one contact piece 20 is fixed and the other contact piece 21 can be brought from the switch-on to the switch-off position (and vice versa) by means of a drive rod 19 by means of a drive rod.
  • the arc 23 which arises in the switching path 4 when it is switched off is blown by means of a compression device.
  • an insulating gas stream is directed by means of an insulating material nozzle 12 onto the arc 23 burning in the switching path 4.
  • This compression device as is usual with SF6 indentation switches, consists of a compression cylinder 17 and two trays 1 and 2, which move towards one another when switched off and thus compress the insulating gas in a compression space 11.
  • the compression cylinder 17 is connected as a fixed part to the base 2 and the base 1 with the switching piece 21 perform the switching movement by means of the drive rod 19, the base 1 being drawn into the compression cylinder 17.
  • a pressure chamber 3 is located between the base 1 and the insulating material nozzle 12 and a gas storage space 9 is separated therefrom by a partition 25.
  • the pressure chamber 3 is provided in the direction of the switching path 4 with an outflow opening 5, in which an insulating gas heated by the arc flows in a check valve 6 is prevented.
  • the check valve 6 closes only against the force of a spring 31, the spring contacts of which are dimensioned such that the check valve 6 closes in the event of a gas pressure wave resulting from high-current arcs, but remains open when gas is drawn into the compression space 11 as a result of a switch-on.
  • the gas storage space 9 has an inlet 26 in the direction of the switching path 4 and an opening 10 which opens into the pressure chamber 3 on the side opposite the outflow opening 5.
  • the bottom 1 is provided with an inflow opening 7, which connects the compression space 11 to the pressure chamber 3.
  • a closure element 8 is arranged in the region of the opening 10 and the inflow opening 7.
  • This closure member 8 is in Fig. 1 as a sliding ring with an L-shaped Cross section formed. It can assume two positions: a first position in which the axial leg of the closure element 8 is pushed in a sealing manner in front of the opening 10 and opens the inflow opening 7. In a second position, in which the closure member 8 is located in the illustration in FIG.
  • the opening 10 is opened and the inflow opening 7 is closed by the radial leg of the closure member 8. If no pressure differences act on the closure member 8, it is held by a spring 24 in this second position shown.
  • the bottom 2 is designed as a fixed component, the drive rod 19 passing through a hole in this bottom and a seal ensuring the gas tightness of this passage.
  • a vent hole 13 is arranged, which is provided with a vent valve 14, which opens against the pressure of a spring 14 '.
  • the valve 35 to 39 is configured as follows: the bottom 1, which separates the pressure chamber 3 from the compression space 11, is not fixedly connected to the drive rod 19, but is displaceably mounted on it to a small extent.
  • the drive rod 19 has an annular recess 35 which is delimited on one side by a shoulder 36 and on the other side by a snap ring 37.
  • the bottom 1 has at its bore, through which the drive rod 19 passes, a projection 38 which engages in the annular recess 35 of the drive rod 19. This projection 38 strikes the shoulder 36 in one position of the base 1 and in the other position of the base 1 this projection strikes the snap ring 37.
  • the projection 38 is designed such that it comes to a gas-tight system on the snap ring 37.
  • recesses 39 are formed in the manner of radially arranged cutouts. This creates a connection between the pressure chamber 3 and the compression space 11 in the position of the base 1, in which the projection 38 rests on the shoulder 36.
  • the wall of the pressure chamber 3, the nozzle 12 and the partition wall 25 are connected to the Bottom 1 firmly connected and thus also displaceable relative to the drive rod 19 within the limits of the recess 35.
  • the SF6 impression switch shown has the following functions:
  • the function corresponds to that known from conventional SF6 impression switches:
  • the gas is compressed by the switching movement, mediated by the drive rod 19, between the base 1 moved with the drive rod 19 and the fixed base 2 in the compression space 11, passes through the inflow opening 7 and flows through the opening 5 to the arc 23, around the latter to blow at zero crossing.
  • the quenching gas opens the closure element 8 in this way, flows through the pressure chamber 3 and, after leaving the pressure chamber 3 through the outflow opening 5, finally reaches the switching path 4 in order to blow the arc 23.
  • the outflow opening 5 is not closed by the check valve 6, since in the case of low-current arcs there is no gas pressure wave which is strong enough to close the check valve 6 against the force of the spring 31.
  • the SF6 impression switch adapts to the conditions caused by the gas expansion and uses this gas expansion to produce the required insulating gas pressure:
  • insulating gas is compressed in the compression space 11 in the manner described above, flows through the inflow opening 7 into the pressure chamber 3, the closure member 8 being opened by the gas flow.
  • the arc 23 is drawn in the switching path 4, whereby extinguishing gas expands and, as shown by the curved arrow, flows in the direction of the compression device.
  • the outflow opening 5 is closed by the check valve 6 and the pressurized gas flows into the gas storage space 9.
  • the closed check valve 6 in the pressure chamber 3 and the compression chamber 11 produce reproducible pressure conditions, so that a specific pressure can be assigned to a specific distance between the switching contacts 21 and 22.
  • the pressure in the compression space 11 drops sharply, which has the consequence that the closure member 8 moves into the position in which it closes the inflow opening 7 with its radial leg and at the same time opens the opening 10.
  • the drive is completely relieved of the pressure force in the compression space 11 by venting it, so that there is no braking of the switching movement or even a backward movement, on the contrary - the switching movement is even accelerated by the relief.
  • the drive advantageously only has to apply the energy for the pre-compression of the gas in the pressure chamber 3.
  • the expanded gas which is stored in the gas storage space 9 and thereby cooled, flows through the opening 10 into the pressure chamber 3.
  • the cold gas pre-compressed in the pressure chamber 3 is post-compressed by the gas pressure wave coming from the gas storage space 9, which cold gas of high density lies in front of the outflow opening 5 in order to serve the blowing at the moment of zero current crossing which is decisive for the extinguishing of the arc.
  • the gas pressure generated by the arc 23 decreases, the check valve 6 opens and the cold gas cushion flows out of the outflow opening 5 in the direction of the switching path 4 in order to blow the arc there. In this way, optimal extinguishing conditions were created while relieving the load on the drive.
  • the valve 35 to 39 has no function in the shutdowns: If the drive rod 19 is moved downward to shutdown, the base 1 initially remains due to the inertia of itself and the pressure chamber wall, the partition 25 and the insulating material nozzle 12, and under the effect of Frictional force of the contact 32 in its position. As a result, the projection 38 rests gas-tight on the snap ring 37 regardless of the starting position of the base 1, as a result of which the base 1 is carried along in the course of the opening movement. The gas compressed in the compression space 11 also exerts a compressive force on the base 1, which also presses the base 1 against the snap ring 37.
  • This negative pressure also results in an additional force which the Cantilever 38 pressed onto the shoulder 36. Due to the negative pressure in the compression chamber 11, the hot gas flows from the pressure chamber 3 into the compression chamber 11. This in turn creates a negative pressure in the pressure chamber 3, which leads to the pressure chamber 3 being filled with cold gas through the opening of the insulating material nozzle 12. This cold gas is supplied from the switching chamber surrounding the arc extinguishing device.
  • the spring 31 of the check valve 6 is selected with respect to its spring constant such that this suction of the cold gas cannot lead to the check valve 6 being closed.
  • the goal is achieved to fill the pressure chamber 3 with cold gas by the switch-on movement, so that cold quenching gas is provided in the pressure chamber 3 for renewed arcing.
  • arc quenching is also ensured if, after a short-circuit current has been interrupted, the circuit is switched off again, which necessitates blowing the arc with the aid of the compression device.
  • the fact that the hot gas of low density is in the compression space 11 is harmless because this gas only flows to the switching path when all the cold gas from the pressure chamber 3 has blown the arc 23. At this point in time, when the gas of lower density flows in from the compression space 11, the arc 23 has already been extinguished.
  • Fig. 2 shows a different embodiment of the floors 1 and 2 and the cylinder of the compression chamber, which as a cylinder 17 'with the bottom 1st is connected and is pulled by the switch-off movement over the bottom 2 designed as a piston.
  • the vent valve 14 is opened against the force of a spring 14 ⁇ by a pin 18.
  • the length of this pin 18 is dimensioned such that the vent valve 14 lifts the valve plate of the vent valve 14 out of its closed position when a distance between the switching pieces 20 and 21 which is sufficient for arc extinguishing is reached.
  • the spring 14 ⁇ must have a larger spring constant than the spring 14 'described in Fig. 1'.
  • the closure member 8 is also designed as an L-shaped ring, but in order to achieve better guidance, the axial leg is longer and the connection to the valve 35 to 39 is made through a bore.
  • the opening leading from the gas storage space 9 into the pressure chamber 3 has been moved upwards compared to FIG. 1 in order to insert a shoulder 47 designed as a projection of the drive rod 19.
  • the lower end 46 of the partition wall 25 was designed such that when it is switched on when the projection 38 abuts the shoulder 36, there is a gas-tight seal between the end 46 of the partition wall 25 and the shoulder 47. As a result, a closable opening 10 'is achieved.
  • the advantage of this design is that the fresh gas flow is passed completely through the pressure chamber 3, whereby a complete filling of the pressure chamber 3 with fresh gas is achieved, so that cold gas of high density is available in sufficient mass for renewed arcing and also the walls a certain amount Experience cooling.
  • the check valve 6 is also designed differently than in FIG. 1:
  • the check valve 6 has arms 34 which point in the direction of the switch axis and which, when switched on by means of a collar 33 connected to the drive rod 19, lift the check valve 6 out of its closed position.
  • This opening of the check valve 6 takes place due to the displaceability of the base 1 relative to the drive rod 19, which when switched on also leads to a relative movement of the valve seat of the check valve 6 relative to the drive rod 19 and thus the collar 33.
  • the rest of the function of the check valve 6 is not impaired and a spring is not required.
  • Fig. 2 shows the switching off of a high-current arc.
  • the straight arrow shows the switch-off movement of the drive rod 19.
  • the gas pressure wave caused by the arc 23 flows in the direction of the curved arrow with the check valve 6 closed, through the inlet 26 into the gas storage space 9 and from there, in the second one described above (FIG. 1) Phase of the switch-off, through the opening 10 'in the pressure chamber 3.
  • the dashed arrows show the backflowing of the gas from the pressure chamber 3 when the current approaches the zero crossing with a blowing of the arc 23. Since the sufficient distance to achieve an arc extinguishing between the Switch contacts 20, 21 is achieved, the pin 18 has opened the vent valve 14.
  • the arrows pointing through the ventilation hole 13 show the ventilation of the compression space 11, which leads to a relief of the drive.
  • Fig. 3 shows the embodiment of FIG. 2 when switched on.
  • the straight arrow pointing upwards shows the switch-on movement of the moving switch parts.
  • the projection 38 bears against the shoulder 36, as a result of which the pressure chamber 3 is connected to the compression space 11 via the recess 35 and the recesses 39 and the ventilation opening 30.
  • the compression space 11, which increases as a result of the activation, sucks the gas out of the pressure chamber 3, as the dashed line shows. Since the check valve 6 is open, fresh arc gas of high density flows out of the switching chamber surrounding the arc quenching device, as shown by the curved arrows Nozzle 12 and the outflow opening 5 into the pressure chamber 3.
  • the vent valve 14 is closed when it is switched on.
  • the inflow opening 7 serves as a ventilation opening for switching on.
  • the closure member 8 takes over the function of the valve, this closure member 8 being opened when switched on.
  • the base 1 is equipped with an annular projection 43 which comprises the drive rod 19.
  • This projection 43 engages in an annular groove 40 of the drive rod 19, wherein the base 1 - and the switch parts connected to it - can carry out a slight displacement in that the projection 43 has a smaller width than the groove 40.
  • the projection 43 When it is switched off the projection 43 on the Shoulder 41 of the groove 40 on.
  • the projection 43 rests on the shoulder 42.
  • the bottom 1 slides in a gastight manner on the drive rod 19.
  • a holding lug 45 is connected to the drive rod 19 and engages in a recess 44 in the closure member 8.
  • This retaining lug 45 is arranged in such a way that when it is switched on it lifts the closure member 8 out of its closed position due to the relative movement of the base 1 with respect to the drive rod 19.
  • the pressure chamber 3 is connected to the compression space 11 via the inflow opening 7.
  • the arrow through the inflow opening 7 shows the suction of the gas located in the pressure chamber 3 in the compression chamber 11.
  • the opening 10 ' is closed in the manner described above.
  • the fresh gas can flow into the pressure chamber 3 as described in FIG. 3.
  • the relative movement of the base 1 with respect to the drive rod 19 takes place, as already explained, by the inertia, the friction and the pressures.
  • Fig. 5 shows the same training when switching off a high-current arc.
  • the inflow opening 7 was closed by the fact that the pin 18 had opened the vent valve 14 (second phase of the switch-off) under the pressure of the spring 24 on the closure element 8 and the gas pressure wave flows through the opening 10 'into the pressure chamber 3.
  • the check valve 6 opens and the arc is blown.
  • FIG. 6 shows the design according to FIG. 4 when a low-current arc is switched off.
  • the compressed gas in the compression chamber 11 flows through the inflow opening 7 while opening the closure member 8 against the pressure of the spring 24 and closing the opening 10 'in the pressure chamber 3. From there this quenching gas flows through the opening of the check valve 6 to the switching path, where the arc is blown.
  • the partition 25 is formed at its lower end 46 so that it comes to rest with the closure 48, which is formed by the upper part of the vertical leg of the closure member 8, and thereby closes the opening 10 '.

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Claims (11)

  1. Disjoncteur à compression de SF₆ comportant une chambre de commutation remplie d'un gaz isolant, au moins deux pièces de commutation (20, 21) dont une (21) au moins est déplaçable au moyen d'une tige d'entraînement (19), un dispositif de compression (17) actionné par ce déplacement de commutation pour le gaz isolant dont le volume de compression (11) est délimité par deux fonds (1, 2) opposés l'un à l'autre, déplaçables l'un par rapport à l'autre, une chambre de pression (3) étant prévue entre la buse (12) de l'isolant et le fond (1) tourné vers celle-ci, laquelle chambre de pression présente un orifice d'évacuation (5) pouvant être fermé en direction du parcours de commutation par une soupape de non-retour (6), et dans le fond (1) étant prévu un orifice d'entrée (7), pouvant être fermé au moyen d'un organe de fermeture (8), et une chambre d'accumulation de gaz (9), reliée au parcours de commutation, s'étendant jusqu'à un orifice (10) pouvant être fermé au moyen de l'organe de fermeture (8), lequel orifice débouche dans la partie, tournée à l'opposé de l'orifice d'évacuation (5), de la chambre de pression (3), dans une première position de l'organe de fermeture (8) l'orifice d'entrée (7) étant ouvert et l'orifice (10) étant fermé et dans une seconde position de l'organe de fermeture (8), l'orifice d'entrée (7) étant fermé et l'orifice (10) ouvert et le changement de position de l'organe de fermeture (8) pouvant être commandé par la distance de commutation parcourue ou par les pressions s'établissant, dans lequel la tige d'entraînement (19) est montée de manière à coulisser axialement, de manière limitée par rapport au fond (1) et à la chambre de pression (3), entre la chambre de compression (11) et la chambre de pression (3) un orifice d'aération (30 ; 7) avec une soupape (35 à 39 ; 8, 24; 40 à 48) étant prévu, le déplacement de la tige d'entraînement (19) par rapport au fond (1) entraînant, à l'enclenchement du disjoncteur, une ouverture de la soupape et la soupape de non-retour (6) étant maintenue en position ouverte lors de l'enclenchement du disjoncteur.
  2. Disjoncteur à compression de SF₆ selon la revendication 1, caractérisé en ce que la soupape de non-retour (6) est équipée d'un ressort (31) dont la constante est telle que la soupape de non-retour (6) se ferme dans le cas d'une onde de pression de gaz, due à des arcs électriques puissants, mais reste ouvert lors de l'aspiration du gaz dans le volume de compression (11).
  3. Disjoncteur à compression de SF₆ selon les revendications 1 ou 2, caractérisé par une soupape (35 à 39) dans laquelle le fond (1), séparant la chambre de pression (3) de la chambre de compression (11), est pourvu d'un collet (38) entourant la tige d'entraînement (19), le collet (38) s'engageant dans un évidement (35) annulaire de la tige d'entraînement (19), de manière que le collet (38) s'applique, lors d'un déplacement d'enclenchement, de manière étanche contre un jonc (37) limitant l'évidement (35) et, lors d'un déplacement de coupure, le collet (38) s'applique contre un épaulement (36) de l'évidement (35), la chambre de pression (3) communiquant par des évidements (39) avec la chambre de compression (11).
  4. Disjoncteur à compression de SF₆ selon l'une des revendications 1 à 3, caractérisé en ce que les évidements (39) sont des fraisages disposés radialement sur le côté du collet (38), tourné vers l'épaulement (36).
  5. Disjoncteur à compression de SF₆ selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que l'organe de fermeture (8) est un anneau coulissant axialement de section transversale en L, dans la première position de l'organe de fermeture (8), la branche axiale étant poussée de manière étanche devant l'orifice (10) et l'orifice d'entrée (7) étant libéré et, dans la seconde position, l'orifice (10) étant libéré et l'orifice d'entrée (7) étant fermé par la branche radiale, et en ce que le déplacement axial de l'anneau en L est entraîné par une purge de la chambre de compression (11).
  6. Disjoncteur à compression de SF₆ selon la revendication 5, caractérisé en ce que la purge de la chambre de compression (11) est opérée par un alésage de purge (13) avec une soupape de purge (14), qui s'ouvre à l'encontre de la force d'un ressort (14′), la constante du ressort étant déterminée de manière que l'ouverture de la soupape de purge (14) se produise lors d'une pression dans la chambre de compression (11), qui s'établit lorsque la distance entre le contact de commutation (20, 21), suffisante pour éteindre l'arc, est atteinte alors que la soupape de non-retour (6) est fermée.
  7. Disjoncteur à compression de SF₆ selon la revendication 5, caractérisé en ce que la soupape de purge (14) s'ouvre à l'encontre de la force d'un ressort (14˝) dont la constante est supérieure à celle du ressort (14′) et en ce qu'avec le fond (1) est reliée une tige (18) dont la longueur est telle qu'elle ouvre la soupape de purge (14) lorsqu'une distance entre les contacts de commutation (20, 21), suffisante pour éteindre l'arc, est atteinte.
  8. Disjoncteur à compression de SF₆ selon la revendication 5, caractérisé en ce que lorsqu'est atteinte une distance entre les contacts de commutation (20, 21), suffisante pour éteindre l'arc, le fond (2) passe sur une découpe prévue sur le cylindre de compression (17) et/ou sur la tige d'entraînement (19), laquelle découpe fait communiquer le volume de compression (11) avec la chambre de compression.
  9. Disjoncteur à compression de SF₆ selon une ou plusieurs des revendications 5 à 8, caractérisé en ce que la cloison (25), solidaire du fond (1), vient s'appliquer avec son extrémité (46) inférieure contre un talon (47), conçu à la manière d'un collet de la tige d'entraînement (19), lorsque le collet (38) s'applique contre l'épaulement (36), l'orifice (10′) étant fermé.
  10. Disjoncteur à compression de SF₆ selon une ou plusieurs des revendications 1, 2 ou 6 à 9 et 5, comportant une soupape (7, 8, 24 et 40 à 48), caractérisé en ce que le fond (1) est pourvu d'un collet (43) annulaire, entourant la tige d'entraînement (19), le collet (43) s'engageant dans une rainure (40) annulaire de la tige d'entraînement (19), le collet (43) s'appliquant contre l'épaulement (42) lors d'un déplacement d'enclenchement et contre l'épaulement (41) lors d'un déplacement de coupure, en ce que le fond (1) glisse de manière étanche aux gaz sur la tige d'entraînement (19), en ce qu'un ergot d'arrêt (45) relié à la tige d'entraînement (19), s'engage dans une découpe (44) de l'organe de fermeture (8) et, lors de l'enclenchement, se déplace de manière étanche devant l'orifice (10′), l'orifice d'entrée (7) étant simultanément ouvert.
  11. Disjoncteur à compression de SF₆ selon une ou plusieurs des revendications 1 à 10, caractérisé en ce que la soupape de non-retour (6) est pourvue de bras (34), dirigés vers l'axe du disjoncteur, lesquels bras soulèvent la soupape de non-retour (6) de sa position de fermeture, lors d'un enclenchement, au moyen d'un épaulement (33), relié à la tige d'entraînement (19).
EP89117724A 1988-12-23 1989-09-26 Interrupteur monopression à SF6 Expired - Lifetime EP0374384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883843406 DE3843406A1 (de) 1988-03-25 1988-12-23 Sf(pfeil abwaerts)6(pfeil abwaerts)-eindruckschalter
DE3843406 1988-12-23

Publications (3)

Publication Number Publication Date
EP0374384A2 EP0374384A2 (fr) 1990-06-27
EP0374384A3 EP0374384A3 (fr) 1991-06-19
EP0374384B1 true EP0374384B1 (fr) 1994-12-28

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EP89117724A Expired - Lifetime EP0374384B1 (fr) 1988-12-23 1989-09-26 Interrupteur monopression à SF6

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EP (1) EP0374384B1 (fr)
DE (1) DE58908837D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898149A (en) * 1995-09-30 1999-04-27 Asea Brown Boveri Ag Power circuit-breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751462B1 (fr) * 1996-07-22 1998-08-28 Gec Alsthom T & D Sa Disjoncteur a haute tension a auto-soufflage d'arc
FR2799571B1 (fr) * 1999-10-07 2001-12-21 Schneider Electric High Voltag Disjoncteur a autoexpansion a clapet de surpression et de remplissage
EP3032561B1 (fr) * 2014-12-08 2017-08-30 Siemens Aktiengesellschaft Arrangement d'interrupteur électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH568649A5 (fr) * 1974-07-29 1975-10-31 Sprecher & Schuh Ag
CH655611B (fr) * 1981-06-18 1986-04-30
FR2575323B1 (fr) * 1984-12-20 1987-01-16 Alsthom Atlantique Disjoncteur a gaz comprime
FR2596575B1 (fr) * 1986-03-26 1988-05-20 Alsthom Disjoncteur a gaz dielectrique sous pression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898149A (en) * 1995-09-30 1999-04-27 Asea Brown Boveri Ag Power circuit-breaker

Also Published As

Publication number Publication date
EP0374384A3 (fr) 1991-06-19
EP0374384A2 (fr) 1990-06-27
DE58908837D1 (de) 1995-02-09

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