EP0639843B1 - Schalter mit Löschkammer, insbesondere Lasttrennschalter - Google Patents

Schalter mit Löschkammer, insbesondere Lasttrennschalter Download PDF

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Publication number
EP0639843B1
EP0639843B1 EP94112610A EP94112610A EP0639843B1 EP 0639843 B1 EP0639843 B1 EP 0639843B1 EP 94112610 A EP94112610 A EP 94112610A EP 94112610 A EP94112610 A EP 94112610A EP 0639843 B1 EP0639843 B1 EP 0639843B1
Authority
EP
European Patent Office
Prior art keywords
switch according
contact
extinguishing chamber
switch
movable contact
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
EP94112610A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0639843A1 (de
Inventor
Fritz Hollmann
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.)
Fritz Driescher Kg Spezialfabrik fur Elektrizitatswerksbedarf & Co GmbH
Original Assignee
Fritz Driescher Kg Spezialfabrik fur Elektrizitatswerksbedarf & Co 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 Fritz Driescher Kg Spezialfabrik fur Elektrizitatswerksbedarf & Co GmbH filed Critical Fritz Driescher Kg Spezialfabrik fur Elektrizitatswerksbedarf & Co GmbH
Publication of EP0639843A1 publication Critical patent/EP0639843A1/de
Application granted granted Critical
Publication of EP0639843B1 publication Critical patent/EP0639843B1/de
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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts
    • 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 switch with an arcing chamber, in particular switch disconnector for medium-voltage switchgear filled with extinguishing gas according to the preamble of claim 1 (FR-A-696 259).
  • Such switches are known in a wide variety of designs, it being possible to differentiate basically into switches with open and closed quenching chambers.
  • the closed quenching chambers are hermetically sealed from the atmosphere surrounding them, be it air or another gas, of the switch housing, while the interior of the open quenching chambers is in gas exchange with the atmosphere of the switch housing.
  • the latter type is characterized above all by an inexpensive construction, which is often at the expense of the extinguishing effectiveness.
  • the object of the invention is to create an open quenching chamber which nevertheless has an efficiency which is comparable to that of the closed quenching chambers with a simple and therefore inexpensive construction.
  • the invention takes advantage of the fact that spaced-apart, mutually insulated metal sheets virtually suck an arc that forms during the switch-off process between opening contact pieces on their front edges and divide and deionize and thus extinguish them, and proposes the specified in the main claim Characteristics before.
  • the deion or extinguishing plates surround the movable contact circumferentially at least substantially completely at least in part of its path, the arc which arises when the contact is opened is detected in an extremely effective manner, taking advantage of its lability and evasive property in any direction between the Plates pressed, cut up, also cooled down and finally extinguished without it being able to evade.
  • the arc is controlled specifically during its existence.
  • the quenching plates surround the movable contact essentially over its entire circumference, as a possible embodiment also one in which the quenching plates have radially continuous slots or indentations or bulges and / or the like Have claim 14.
  • the fixed contact is an impact contact and the movable contact is a contact pin.
  • the quenching plates can be essentially vertical in their main plane aligned with the direction of movement of the movable contact as radial plates, which are preferably held parallel to one another by insulating spacers.
  • the extinguishing effect of the deion sheets can be increased by their gassing, which is achieved in a particularly simple manner within the scope of the invention in that the extinguishing chamber housing is open on one end face and is provided with openings in the side walls.
  • the side openings in the quenching chamber housing enable an optimally working construction in that the radially aligned deion sheets can be arranged at the level of the side quenching chamber housing openings so that they are flushed from the outside by the gas of the switch housing, which in this construction is virtually free of deflection between the sheets of whose outer end faces can come here.
  • the shaft of the movable contact carries a preferably radially oriented suction disc, which moves it participates; the suction disk is preferably arranged at such a distance from the contact pin tip that it is in the switched-on state below the quenching plate package essentially parallel to the quenching plates, while in the switched-off state it is at a distance from the lower quenching chamber housing edge. This ensures that there is not even the slightest risk of plastic bridging between the suction disc and thus the contact pin on the one hand and the arcing chamber housing on the other hand when it is switched off.
  • the suction disc can be used advantageously for guiding the contact pin if it has an outer diameter corresponding to the inner diameter of the arcing chamber housing, so that it can be supported all around on the inner wall of the housing.
  • the pin is supported via the suction disc during most of the switch-off process, and only on the last piece, on which the suction disc leaves the arcing chamber housing, should further support of the pin be ensured if possible , which can happen, for example, in that underneath the suction disc the shaft is provided with laterally projecting guide pins which slide at least temporarily and partially in a guide arranged below the arcing chamber housing.
  • An overall designated 1 quenching chamber or the like in a known manner within a switch housing essentially consists of a housing 2 which has a bell shape, i.e. the side walls are inclined slightly diverging towards the end which is open towards the bottom.
  • the arcing chamber housing 2 is installed in the orientation shown, rather any other angular position, including the one rotated by 180 °, is possible.
  • the lower, open end and upper, closed end of the arcing chamber 1 are discussed below using the example shown.
  • a knock-in contact 3 (fixed contact) known as such is fastened, which interacts with a mating contact 4 projecting from below through the open quenching chamber housing 2, which is in the solid position in the switched-off position, while the dashed line Representation shows its switch-on position.
  • a package of metal plates 5 (deion plates), which are arranged at a distance from one another and are arranged parallel to one another and are aligned radially with respect to the movable contact 4, is fastened in the housing 2 and is kept at a mutual distance via insulating spacers 6 will.
  • the Deion- or extinguishing plates 5 each have a concentric recess, so that a total of a passage for the movable counter contact 4 remains open and the plates 5 surround the contact 4 as closely as possible in the switched-on state.
  • the height of the package is somewhat less than the stroke a of the movable mating contact 4 of the switch disconnector, for reasons that follow from the explanations below.
  • the movable contact 4 namely carries a collar-shaped radially oriented suction disk 7, which is positively attached to the shaft of the contact 4 at a certain distance below the contact tip 8. Since the movable mating contact 4 is shown in solid lines in its switch-off position in the attached figures, the stroke a results as the distance between the dashed (contact) and the solid (switch-off) position.
  • the illustrations also make it clear that the distance between the suction disk 7 and the contact tip 8 is selected such that the suction disk is positioned in the switch-on position at a short distance below the quenching plate package, i.e. the part of the contact 4 located above the suction disc 7 extends completely through the extinguishing plates 5.
  • the illustrations also show that the mutual dimensions and the stroke are preferably selected so that the contact tip 8 remains slightly below the quenching plate stack in the switched-off position.
  • the suction disk 7 is then at a distance b from the inner wall 9 of the arcing chamber housing 2 for the purpose of interrupting the bridge, which is designed to open conically at its lower end.
  • This shape of the lower edge of the housing has both fluidic advantages for the gas flowing through the quenching chamber 1 and insertion properties for the suction disc 7 into the interior of the housing (funnel effect), because the suction disc is adapted with its outer diameter to the inner diameter of the housing 2, so that it over most of the way of the movable contact 4 abuts the inner wall of the housing 2 and thus leads the pin safely.
  • this suction disk 7 is, however, to support the extinguishing function of the deion sheets, at the height of which openings 11 are provided in the housing 2, through which gas is produced when the contact 4 moves downward, that is to say in the event of switching off due to the circumferential contact of the suction disk 7 on the housing inner wall from the environment - in the illustrated embodiment, the SF 6 gas, with which the switch housing in which the quenching chamber is housed - is sucked from the outside between the quenching plates 5, swirls there and supports the quenching function of the quenching plates 5 quite considerably.
  • the otherwise uncontrollable arc is encompassed in a controlled manner, divided, pressed or sucked into the spaces between the quenching plates and then quenched.
  • Fig. 2 shows the lower guide area for the movable counter contact 4, and preferably in the form of one or more guide plates 12, which is or are each provided with an elongated hole 13, which follow above, ie slightly open towards the quenching chamber 1 and in which at least one laterally protruding pin 14a is guided, above which, in the exemplary embodiment shown, a further guide pin 14b is positively connected to the contact pin 4.
  • the distance of the pin 14b from the suction disk is selected so that the pin 14b, when guided, engages in the elongated hole 13 at which the suction disk 7 leaves the part of the inner wall of the housing 2 which guides it. This ensures safe contact pin guidance.
  • the invention creates a quenching chamber of the open type which requires little effort and is nevertheless effective, and which is also extremely easy to maintain.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Push-Button Switches (AREA)
  • Tumbler Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP94112610A 1993-08-19 1994-08-12 Schalter mit Löschkammer, insbesondere Lasttrennschalter Expired - Lifetime EP0639843B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4327844 1993-08-19
DE4327844A DE4327844A1 (de) 1993-08-19 1993-08-19 Löschkammer für Schalter, insbesodere für Lasttrennschalter

Publications (2)

Publication Number Publication Date
EP0639843A1 EP0639843A1 (de) 1995-02-22
EP0639843B1 true EP0639843B1 (de) 1997-03-19

Family

ID=6495509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112610A Expired - Lifetime EP0639843B1 (de) 1993-08-19 1994-08-12 Schalter mit Löschkammer, insbesondere Lasttrennschalter

Country Status (4)

Country Link
EP (1) EP0639843B1 (enrdf_load_stackoverflow)
AT (1) ATE150583T1 (enrdf_load_stackoverflow)
DE (2) DE4327844A1 (enrdf_load_stackoverflow)
NO (1) NO306432B1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627098A1 (de) * 1996-07-05 1998-01-08 Asea Brown Boveri Leistungsschalter
DE10013549B4 (de) * 2000-03-20 2006-08-10 Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co Anordnung eines Schalters

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE272742C (enrdf_load_stackoverflow) *
FR696259A (fr) * 1929-09-11 1930-12-29 Alsthom Cgee Perfectionnement apporté aux interrupteurs électriques fonctionnant dans un gaz
CH178662A (de) * 1934-10-20 1935-07-31 Spaelti Soehne & Co Einrichtung zur Unterbrechung von Lichtbogen.
DE732000C (de) * 1940-06-05 1943-02-19 Lindner & Co Leistungsschalter mit Lichtbogenloeschung nach dem Sauggasprinzip
FR87927E (fr) * 1964-10-21 1966-01-24 Merlin Gerin Dispositif d'extinction d'arc
FR2034118A1 (enrdf_load_stackoverflow) * 1969-02-05 1970-12-11 Kesl Karel
DE2231195A1 (de) * 1972-06-26 1974-01-17 Driescher Eltech Werk Last- oder leistungsschalter
CH553476A (de) * 1973-10-11 1974-08-30 Sprecher & Schuh Ag Druckgas-leistungsschalter fuer hochspannung.

Also Published As

Publication number Publication date
DE59402124D1 (de) 1997-04-24
NO306432B1 (no) 1999-11-01
DE4327844A1 (de) 1995-02-23
NO942876D0 (enrdf_load_stackoverflow) 1994-08-03
ATE150583T1 (de) 1997-04-15
NO942876L (no) 1995-02-20
EP0639843A1 (de) 1995-02-22

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