EP0727088B1 - Schalter - Google Patents

Schalter Download PDF

Info

Publication number
EP0727088B1
EP0727088B1 EP94923585A EP94923585A EP0727088B1 EP 0727088 B1 EP0727088 B1 EP 0727088B1 EP 94923585 A EP94923585 A EP 94923585A EP 94923585 A EP94923585 A EP 94923585A EP 0727088 B1 EP0727088 B1 EP 0727088B1
Authority
EP
European Patent Office
Prior art keywords
plates
contact
arc
switch
strip
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
EP94923585A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0727088A1 (de
Inventor
Paul Kadan
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.)
Felten and Guilleaume Austria AG
Original Assignee
Felten and Guilleaume Austria 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 Felten and Guilleaume Austria AG filed Critical Felten and Guilleaume Austria AG
Publication of EP0727088A1 publication Critical patent/EP0727088A1/de
Application granted granted Critical
Publication of EP0727088B1 publication Critical patent/EP0727088B1/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber

Definitions

  • the invention relates to a switch, in particular a self-switch, with the features of the introductory part of independent claim 1.
  • the space between the stationary contact piece, which is arranged on a contact strip, that is to say is carried by it, and the movable contact, which is in the OFF position against a contact strip serving as a stop, is on both sides by plates made of ceramic or another synthetic material. From this space, the ionized gases generated when the contacts are opened (lifting the movable contact from the fixed contact piece) by the arc formed reach an arc quenching chamber in which an arc quenching device comprising several deion sheets is arranged, and emerge from the switch housing through outlet openings .
  • the aim of the invention is to improve the discharge of the ionized gases to the deion plates in the arc quenching chamber.
  • the space between the plates and delimited by the contact strips communicates with the spaces between the outside of the plates and the inside of the adjacent walls of the housing through the openings according to the invention in the interior of the plates.
  • gases generated in circuits in particular in the case of short-circuit shutdowns, can flow back to the contact point by passing through the at least one opening step in the plates and flow back to the contact point between the plates and the housing walls.
  • This will cause the arc; run, that is, the movement of the arc to the deionizing plates in the arc quenching chamber obstructing gas pressure in the area of the front of the arc is reduced.
  • the openings in the invention are arranged within the plates. That the advantageous effect of the openings in the plates can be optimally combined with the actual function of the plates (protection of the housing). Furthermore, the position of the openings in the invention can be adapted to the conditions of the switch (for example the formation of the contacts).
  • the gassing effect that occurs when exposed to an arc which is particularly strong in the case of plates made of synthetic material, the following further effect results from the at least one opening: in the area of the at least one opening in the plates the gassing effect is smaller due to the reduced plate area than in the rest of the plate. This results in a relatively stronger gassing effect of the plates in the area located at the contact point, so that the arc is additionally accelerated by the relatively increased gas pressure acting in the back of the arc.
  • the at least one opening in the plates is provided in the region of a horn in the contact strip which carries the stationary contact piece.
  • the invention can be used with particular advantage for any switch which is designed for higher currents, but in particular for automatic switches, such as circuit breakers, which have to switch off in the event of a short circuit.
  • the fixed contact piece is made by one Contact strip 1 worn, which is shaped into a horn 6 (U-shaped loop).
  • a conductor strip 3 is provided opposite the contact piece 5 and the horn 6 and serves as a contact for the movable contact 2 when it is in the OFF position shown in FIG. 2.
  • the space 8 between the contact strip 1 and the conductor strip 3 is delimited on both sides by plates 7.
  • the plates 7 are arranged in the housing which accommodates the self-switch in such a way that a space 11 remains free between the inwardly facing surfaces 9 of the housing walls 10 and the outwardly facing surfaces 12 of the plates 7, as shown in FIG. 2 is shown.
  • each of the two plates 7 there are openings 4, e.g. in the form of holes. At least one opening 4 is provided for each plate 7, the arrangement shown in FIG. 1 of three openings 4, for example in the corners of an equilateral triangle, on the side of the horn 6 of the contact strip 1 facing away from the contact piece 5 being particularly favorable and therefore preferred according to the invention is.
  • the openings 4 in the plates 7 result in the following advantageous effect when the (short circuit) is switched off (lifting of the movable contact 2 from the fixed contact 5): through the openings 4, the gases produced when the (short circuit) is switched off provide an additional possibility for backflow opened to contact point 5 (this is symbolized in Fig. 2 by arrows). As a result, the gas pressure in the region of the arc end (front front of the arc) which inhibits the arc run (the discharge of the (short-circuit) arc to the deion sheets of an arc quenching chamber, not shown) is additionally reduced.
  • the surface of the plates 7 available in the area of the horn 6 for the gassing effect downsized because there is less material because of the openings 5.
  • the invention can be represented as follows, for example:
  • a switch has a fixed contact piece 5, which is fastened to a contact strip 1 fixed in the housing of the switch, a movable contact 2 which is pivotably mounted in the housing of the switch, and a conductor strip 3 which acts as a stop for the movable contact 2 in its OFF position serves.
  • the space 8 between the contact strip 1 and the conductor strip 3 is delimited by plates 7 on both sides. In the plates 7 three openings 4 are provided, which lead out of the space 8 delimited by the contact strips 1, the conductor strips 3 and the plates 7 into the spaces 11 between the plates 7 and the associated walls 10 of the housing.
  • Arc gases can escape through these openings 4 in the plates 7 and flow back to the contact point, so that the movement of the arc gases to an arc quenching chamber is supported. Furthermore, because of the area of the plates 7 which is reduced in areas through the openings 4, a gas pressure difference between the front and the back of the arc which supports the movement of the arc gases to the arc quenching chamber is formed.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switches With Compound Operations (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)
  • Breakers (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electronic Switches (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP94923585A 1993-11-02 1994-08-22 Schalter Expired - Lifetime EP0727088B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0219993A AT410725B (de) 1993-11-02 1993-11-02 Selbstschalter
AT2199/93 1993-11-02
PCT/AT1994/000117 WO1995012888A1 (de) 1993-11-02 1994-08-22 Schalter

Publications (2)

Publication Number Publication Date
EP0727088A1 EP0727088A1 (de) 1996-08-21
EP0727088B1 true EP0727088B1 (de) 1997-07-30

Family

ID=3529840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94923585A Expired - Lifetime EP0727088B1 (de) 1993-11-02 1994-08-22 Schalter

Country Status (11)

Country Link
EP (1) EP0727088B1 (cs)
AT (2) AT410725B (cs)
AU (1) AU676934B2 (cs)
CZ (1) CZ285082B6 (cs)
DE (1) DE59403580D1 (cs)
DK (1) DK0727088T3 (cs)
ES (1) ES2106556T3 (cs)
HU (1) HU215890B (cs)
NO (1) NO307907B1 (cs)
PL (1) PL174603B1 (cs)
WO (1) WO1995012888A1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005022213A1 (de) * 2005-05-13 2006-11-16 Abb Patent Gmbh Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Vorkammerplatten und strombegrenzender Lichtbogenlöscheinrichtung
DE102006027140A1 (de) * 2006-06-12 2007-12-13 Ellenberger & Poensgen Gmbh Schutzschalter
EP1876617A1 (de) * 2006-07-06 2008-01-09 ABB PATENT GmbH Elektrischer Installationsschalter mit Lichtbogen-Vorkammerraum, Lichtbogenleitschienen und strombegrenzende Lichtbogenlöscheinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185269C2 (de) * 1961-08-21 1975-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einpoliger selbstschalter in schmalbauform
DE1922747A1 (de) * 1969-05-03 1970-11-05 Bbc Brown Boveri & Cie Lichtbogenkammer
DE1933529A1 (de) * 1969-07-02 1971-01-21 Bbc Brown Boveri & Cie Lichtbogenkammer aus Siebkeramik
DE3443122A1 (de) * 1984-11-27 1986-05-28 Brown, Boveri & Cie Ag, 6800 Mannheim Vorrichtung zur unterbrechung von stromkreisen
DE3621690A1 (de) * 1986-06-27 1988-01-14 Bbc Brown Boveri & Cie Loescheinrichtung fuer elektrische schalter

Also Published As

Publication number Publication date
ES2106556T3 (es) 1997-11-01
HU9601165D0 (en) 1996-07-29
DE59403580D1 (de) 1997-09-04
ATA219993A (de) 2002-11-15
NO961789D0 (no) 1996-05-02
PL174603B1 (pl) 1998-08-31
PL314227A1 (en) 1996-09-02
AU7377194A (en) 1995-05-23
EP0727088A1 (de) 1996-08-21
AT410725B (de) 2003-07-25
CZ285082B6 (cs) 1999-05-12
AU676934B2 (en) 1997-03-27
DK0727088T3 (da) 1997-10-13
NO307907B1 (no) 2000-06-13
NO961789L (no) 1996-06-24
WO1995012888A1 (de) 1995-05-11
CZ127996A3 (cs) 1999-01-13
HUT75408A (en) 1997-05-28
HU215890B (hu) 1999-03-29
ATE156298T1 (de) 1997-08-15

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