EP0456139B1 - Disjoncteur à compression - Google Patents

Disjoncteur à compression Download PDF

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Publication number
EP0456139B1
EP0456139B1 EP91107241A EP91107241A EP0456139B1 EP 0456139 B1 EP0456139 B1 EP 0456139B1 EP 91107241 A EP91107241 A EP 91107241A EP 91107241 A EP91107241 A EP 91107241A EP 0456139 B1 EP0456139 B1 EP 0456139B1
Authority
EP
European Patent Office
Prior art keywords
compression
blow
openings
tube
contacts
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
EP91107241A
Other languages
German (de)
English (en)
Other versions
EP0456139A3 (en
EP0456139A2 (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
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0456139A2 publication Critical patent/EP0456139A2/fr
Publication of EP0456139A3 publication Critical patent/EP0456139A3/de
Application granted granted Critical
Publication of EP0456139B1 publication Critical patent/EP0456139B1/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
    • H01H2033/906—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 with pressure limitation in the compression volume, e.g. by valves or bleeder openings
    • 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 invention relates to an electrical compression switch according to the preamble of claim 1.
  • a compression switch with the features of the preamble of claim 1 is known from EP-A-0 146 671 and from EP-A-0 201 430. Since the hot arc gases penetrate into the compression chamber in the first phase during the switch-off movement, the pressure rises rapidly in the known compression switches and loads the drive of the switch.
  • an electrical SF6 impression switch in which the compression space (between the nozzle and the fixed piston) is divided into two areas by a partition.
  • Check valves are provided in the partition and open towards the nozzle.
  • the function with large shut-off currents is improved as follows by the partition with the check valves: With large shut-off currents, the energy converted in the arc leads to a sharp increase in pressure in the nozzle constriction. This increase in pressure is additionally increased by the nozzle material evaporating under the influence of the arc on the surface of the nozzle.
  • the pressure increase leads to a backflow of the SF6 heated in the arc and of the evaporated nozzle material into the compression space and there causes an increase in pressure, which supports the switch-off process. If the pressure in the part of the compression space facing the nozzle outweighs the pressure in the part of the compression cylinder facing away from the nozzle, the check valves in the partition close. This prevents the reaction of the pressure generated by the arc on the drive. As a result, the drive no longer needs to be dimensioned for these high pressures.
  • the drives can thus be designed for a lower stored energy and therefore more cost-effectively.
  • the movable contact and the tube on which the movable contact is attached form a flow channel which is connected to the surrounding space.
  • the invention has for its object to further develop a compression switch of the type described in the preamble of claim 1 so that the gas heated by the arc is used as completely as possible for the arc extinguishing to increase the breaking power, while the drive energy for the switch is kept as low as possible becomes.
  • the object is achieved according to the invention by the features of patent claim 1.
  • the design of the compression switch according to claim 1 has the effect that in the phase until the minimum distance of the contacts required for the arc extinguishing is reached, the openings in the lower area of the blow-back tube are closed, so that the gas heated by the arc cannot flow out of the extinguishing area.
  • the openings in the upper area of the blow-back tube are also open. These openings connect the blow-back pipe and the upper part of the compression space. This allows the gas heated in the arc to flow into the compression chamber with a low flow resistance.
  • Surrounding space is to be understood as the space outside the switching device, which comprises the compression device with the switching contacts.
  • a compression switch shown in FIG. 1 contains a compression device with a stationary compression piston 2 and a movable compression cylinder 20 surrounding it.
  • the insulating nozzle has channels 23 extending from the interior of the compression cylinder 20 in order to lead the extinguishing gas into the extinguishing zone.
  • the compression cylinder 20 is divided by a partition wall 21 into a subspace 4 facing the nozzle and a subspace 5 facing away from the nozzle.
  • Check valves 10 are arranged in the partition wall 21 and open towards the partial space 4.
  • the hollow movable contact 6 continues in the blow-back tube 7, which has first openings 9, which establish a connection to the partial space 4 of the compression space, and second openings 8, which open outside the compression space into a space 22 inside the compression piston 2.
  • the space 22 is connected via openings 24 to a space outside the switching device.
  • the switching device is composed of the compression device and the switching contacts.
  • the room 22 therefore corresponds to the room surrounding the switching device.
  • a fixed pipe 13 Arranged within the blow-back pipe 7 is a fixed pipe 13, which is connected to the fixed piston 2 via a plurality of bolts 14 distributed around the circumference, which reach through slots 26 in the blow-back pipe 7. The bolts 14 sliding in the slots 26 prevent the compressed gas from escaping from the subspace 5.
  • the fixed contact pin 15 engages in the movable contact piece 6.
  • contacts (not shown) arranged concentrically with the contact pair 6, 15 can be provided for guiding the nominal current.
  • the differential pressure thus given to the partial compression space 4 leads to the opening of the check valves 10, so that the compressed extinguishing gas can flow into the partial compression space 4 and from there through the passages 23 and through the opening 9 of the blow-back tube to the contacts 6, 15.
  • the openings 9 in the blow-back tube are covered by the fixed tube 13 (see FIG. 2). From this moment on, the extinguishing gas is passed exclusively through the passages 23 to the switch contacts. Simultaneously with the closing of the openings 9, the openings 8 are released in the course of the downward movement of the blow-back tube 7, so that from this point in time the arc is blown through the nozzle and the hollow movable contact 6. The extinguishing gas flows from the nozzles into the expansion space.
  • the valves 18 in the compression piston 2 can also limit the pressure in the sub-chamber 5 to values that are required to extinguish small flows, without the extinguishing ability being impaired in the case of large flows. Until the minimum contact distance necessary for the extinguishing is reached, the opening 8 of the blow-back pipe 7 is closed by the fixed pipe 13, so that the extinguishing gas cannot flow unused to the outside through the blow-back pipe 7.
  • the fixed pipe 13 also opens the opening 9 in the blow-back pipe 7, so that there is a streamlined connection to the subspace 4.
  • the gas heated by the arc in the nozzle is supplied to the subspace 4 both through the channels 23 and through the blow-back tube and is stored therein for the subsequent quenching process.
  • the opening 9 is closed by the fixed tube 13, as already described, while the opening 8 is released at the same time.
  • the pressure in the nozzle also decreases, so that the pressure drop between subspace 4 and nozzle 3 reverses.
  • the quenching gas stored in sub-space 4 is now supplied to the contacts through channels 23 and flows out of the quenching zone through the nozzle and the blow-back tube and thereby extinguishes the arc.
  • the arrangement of the fixed tube 13 within the movable blow-back tube 7 has the additional advantage that the blow-back tube 7 is either completely protected from the hot arc gases or is exposed to these gases over a shorter period of time.
  • the blow-back tube 7 can thus be produced from lighter, less erosion-resistant materials, which reduces the energy required for acceleration.

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  • Circuit Breakers (AREA)

Claims (5)

  1. Disjoncteur à compression comportant un contact fixe (15) et un contact mobile (6), un canal de reflux par soufflage, formé par le contact mobile (6) et un tube de reflux par soufflage (7), un dispositif de compression pour gaz d'extinction, comportant un cylindre de compression (20), relié au contact mobile (6) et un piston de compression (2) fixe, dans lequel, lors du déplacement de coupure jusqu'à ce que soit atteint un écartement donné des contacts, le tube de reflux par soufflage (7) est séparé de la chambre (22) environnante et est relié avec le tube (4, 5) du cylindre de compression et après que cet écartement donné des contacts a été atteint, le tube de reflux par soufflage (7) est relié avec la chambre (22) environnante à l'extérieur du cylindre de compression et est séparé de l'intérieur du cylindre de compression,
    caractérisé en ce
    qu'une cloison (21) partage une chambre de compression, se trouvant dans le dispositif de compression, en deux chambres partielles de compression (4, 5), en ce qu'au moins un passage (24), reliant les deux chambres partielles de compression (4, 5), est pratiqué dans la cloison (21), en ce que ce passage (24) peut être fermé par une soupape de non-retour (10) s'ouvrant vers la partie de chambre de compression (4) éloignée, par rapport au piston de compression (2), et en ce qu'il est formé un organe de commande pour le gaz d'extinction par un tube fixe (13) et par des premiers et des seconds orifices (9, 8) pratiqués dans le tube de reflux par soufflage (7).
  2. Disjoncteur à compression selon la revendication 1,
    caractérisé en ce que
    le tube (13) fixe est assemblé avec le piston de compression (2) fixe, par des boulons (14) qui sont guidés à travers des fentes pratiquées dans le tube de reflux par soufflage (7).
  3. Disjoncteur à compression selon les revendications 1 ou 2,
    caractérisé en ce que
    lorsque les contacts (15, 6) se touchent dans l'une de leurs positions de fin de course, l'intérieur du tube de reflux par soufflage (7) est relié par les premiers orifices (9) avec une partie de chambre (4) adjacente aux contacts de commutation et en ce que les seconds orifices (8) sont fermés par le tube (13) fixe.
  4. Disjoncteur à compression selon une ou plusieurs des revendications précédentes,
    caractérisé en ce que
    dans l'autre position de fin de course des contacts (15, 6), lorsque le disjoncteur à compression est ouvert, les premiers orifices (9) sont fermés par le tube (13) fixe et en ce que l'intérieur du tube de reflux par soufflage (7) est relié par les seconds orifices (8) avec la chambre (22) environnante.
  5. Disjoncteur à compression selon une ou plusieurs des revendications précédentes,
    caractérisé en ce que
    dans le cas de l'écartement minimal des contacts (15, 6), nécessaire à la coupure de courant, les premiers orifices (9) sont recouverts par le tube (13) fixe et les seconds orifices (8) sont reliés à la chambre (22) environnante.
EP91107241A 1990-05-11 1991-05-04 Disjoncteur à compression Expired - Lifetime EP0456139B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4015179 1990-05-11
DE4015179A DE4015179C2 (de) 1990-05-11 1990-05-11 Druckgasschalter

Publications (3)

Publication Number Publication Date
EP0456139A2 EP0456139A2 (fr) 1991-11-13
EP0456139A3 EP0456139A3 (en) 1992-04-08
EP0456139B1 true EP0456139B1 (fr) 1994-12-14

Family

ID=6406207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107241A Expired - Lifetime EP0456139B1 (fr) 1990-05-11 1991-05-04 Disjoncteur à compression

Country Status (2)

Country Link
EP (1) EP0456139B1 (fr)
DE (2) DE4015179C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6163001A (en) * 1998-04-14 2000-12-19 Abb Research Ltd. Puffer type circuit breaker with arcing chamber, auxiliary shunting contacts and exhaust structure with pressure relief valves

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0508160B1 (fr) * 1991-04-12 1994-12-14 GEC Alsthom T&D AG Interrupteur à gaz comprimé
DE4211159A1 (de) * 1992-03-31 1993-10-07 Siemens Ag Elektrischer Hochspannungs-Leistungsschalter
FR2755293B1 (fr) * 1996-10-28 1998-11-27 Gec Alsthom T & D Sa Disjoncteur a piston semi-mobile et a haut pouvoir de coupure de courants capacitifs
FR2799571B1 (fr) * 1999-10-07 2001-12-21 Schneider Electric High Voltag Disjoncteur a autoexpansion a clapet de surpression et de remplissage

Family Cites Families (7)

* 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
JPS4981874A (fr) * 1972-12-14 1974-08-07
FR2291601A1 (fr) * 1974-11-15 1976-06-11 Alsthom Cgee Dispositif de coupure a autocompression
JPS5813565Y2 (ja) * 1977-10-31 1983-03-16 日新電機株式会社 吸引パッフア−型開閉器
DE3104411A1 (de) * 1981-02-09 1982-08-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrischer kompressionsschalter
EP0146671B1 (fr) * 1983-11-15 1988-01-27 Sprecher Energie AG Interrupteur à gaz comprimé
US4665289A (en) * 1985-05-08 1987-05-12 Kabushiki Kaisha Toshiba Puffer type gas insulated circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6163001A (en) * 1998-04-14 2000-12-19 Abb Research Ltd. Puffer type circuit breaker with arcing chamber, auxiliary shunting contacts and exhaust structure with pressure relief valves

Also Published As

Publication number Publication date
DE4015179C2 (de) 1994-03-10
DE4015179A1 (de) 1991-11-14
EP0456139A3 (en) 1992-04-08
DE59103843D1 (de) 1995-01-26
EP0456139A2 (fr) 1991-11-13

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