EP0051756B1 - Dispositif d'extinction d'arc éléctrique, notamment pour disjoncteur de protection - Google Patents

Dispositif d'extinction d'arc éléctrique, notamment pour disjoncteur de protection Download PDF

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Publication number
EP0051756B1
EP0051756B1 EP81108168A EP81108168A EP0051756B1 EP 0051756 B1 EP0051756 B1 EP 0051756B1 EP 81108168 A EP81108168 A EP 81108168A EP 81108168 A EP81108168 A EP 81108168A EP 0051756 B1 EP0051756 B1 EP 0051756B1
Authority
EP
European Patent Office
Prior art keywords
arc
plates
extinction
bank
entry
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
EP81108168A
Other languages
German (de)
English (en)
Other versions
EP0051756A1 (fr
Inventor
Erhard Ing. Grad. Runtsch
Werner Bruckner
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
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 Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT81108168T priority Critical patent/ATE13108T1/de
Publication of EP0051756A1 publication Critical patent/EP0051756A1/fr
Application granted granted Critical
Publication of EP0051756B1 publication Critical patent/EP0051756B1/fr
Expired 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
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc

Definitions

  • the invention relates to an arc extinguishing device, in particular for circuit breakers, with at least one fixed and at least one movable contact piece, between which e.g. in the event of a contact separation caused by a short-circuit current, an arc is drawn, which is fed via at least one arc guide plate connected to one of the contact pieces to an arc-extinguishing plate package for extinguishing the arc, which is surrounded by an envelope additionally covering the outlet side of the arc-extinguishing plate package and having gas outlet openings in this area .
  • An arc extinguishing device of the type mentioned at the outset has become known from DE-B 1 926 355.
  • This device comprises an arc-quenching plate packet, which is surrounded by an envelope consisting of chamber walls and a sieve plate.
  • the sieve plate covers the exit side of the arc quenching plate package and has gas outlet openings in this area.
  • the arc quenching chamber known from DE-B 1 926355 is designed as a very solid housing with relatively thick walls, which covers the arc quenching plate package as a whole, i.e.
  • the arc-quenching plates resting snugly with their edges on the inner wall of the housing, which also applies to the arc-guiding rails, which are likewise placed directly on the inner wall of the housing.
  • the housing is provided with a comb-like end with extensions which engage between two arc-quenching plates and have a specific shape with the edges.
  • the object of the invention is to provide an arc extinguishing device of the type mentioned at the outset, with which a further improvement for the arc entry into the arc extinguishing sheet packet and a reduction in the risk of reignition can be achieved; furthermore, the manufacturability of the arc quenching device is to be made considerably easier.
  • the casing is U-shaped, i.e. has two plates forming the legs of the U and a connecting web connecting these plates to one another and provided with the gas outlet openings, that the two plates - running parallel to the arc-quenching plates - take the arc-quenching plate package between them and the connecting web comes to lie over the gas-outlet side of the arc-quenching plate package and that the plates have elongated, all-round recesses running in the direction of the arc entry, which are designed such that a web of the plate material lying transversely to the direction of arc entry remains in the area of entry of the arc into the quenching plate package.
  • a further advantageous embodiment of the invention can be such that the web on the plates is offset inwards in the direction of the arc entry, in such a way that a cutout which is open to the front is created on the arc inlet sides of the plates in front of the recesses.
  • the introduction of the webs makes it more difficult for the arc base points to run back on the arc guide rails, thus reducing the risk of reignition.
  • the arc migration is essentially caused immediately after the contact separation by the magnetic blowing field, which is generated by the U-shaped design of the power supply to the contact point. If the arc has run into the arc quenching plate package, magnetic forces driving the arc are still present, but the plasma is driven back to the contact point by thermal expansion, so that in the area of the original contact point, reignitions can also take place via the arc quenching plates, if the bars are not provided.
  • the magnetic field which is formed by the current supply to the contact point will drive the arc smoothly and easily over the webs.
  • the webs have the task, as a thermal barrier, of jumping the arc backwards, i.e. to prevent back to the contact point.
  • this is achieved in any case and accordingly the arc base on the outer arc extinguishing plates will always lie or remain in the area of the recesses of the plates, so that the reignitions both on the side and in the area of the contact point are avoided and prevented are.
  • an intermediate plate can be provided between the two plates running parallel to the arc quenching plates, the shape of which corresponds to the two outer plates.
  • a further embodiment of the invention can be such that the gas outlet openings are designed as slots or as circular openings which are in the area between the light bo gene extinguishers are lying.
  • the exhaust air cross section can be significantly enlarged and distributed over the entire area, so that a wall on the housing of the circuit breaker, such as in DE-B 1 926355, is no longer necessary.
  • a fixed contact piece 12 and a movable contact piece 13 are located within a housing 11 of a circuit breaker, the movable contact piece 13 being pivotably mounted about a fixed axis 14.
  • the fixed contact piece 12 merges into a first arc guide plate 15.
  • a second arc guide plate 16 is provided parallel to the first arc guide plate 15 and is connected to the movable contact piece 13 or to the contact lever 13 via a stranded connection 17.
  • an arc 221 is initially formed, which arises directly at the point at which the two contact pieces 12 and 13 touch. Influenced by the thermal and magnetic self-blowing, this arc moves further away from the contact point; One base point moves the movable contact piece 13 and the other base point along the arc guide plate 15. The arc in its second position is designated by reference number 222. Because of the arrangement of fixed and movable contact piece 12 or 13 magnetic blowing field, the arc is driven in the direction of arrow A to the quenching plates 18 to 21 and is drawn into the recess 22 of the individual arc quenching plates by the magnetic effect of the iron quenching plate package base points and then burns between the individual quenching plates.
  • the arc has the reference number 224.
  • optimal exhaust air routing through the formation of the outlet openings is very important. responsible. These must be designed in such a way that, on the one hand, as little counter pressure as possible is built up in the chamber for the incoming arc and, on the other hand, the individual arcs cannot short-circuit at the ends of the quenching plates, since this would result in a reduction in the arc voltage, which would have a negative effect on the current limitation and would equal the undesirable effects of reignition.
  • the arc quenching plate packet is surrounded by a sheath 30.
  • This envelope 30 according to FIG. 2 is U-shaped and has an upper and a lower plate 32 and 34 which are placed on the upper and lower surface of the arc-quenching plate 16 and 21, respectively. These two plates are connected to one another by means of a connecting web 36 which has gas outlet openings 38.
  • the plates 32 and 34 have a keyhole-like recess 40 and 42, which are closed in the front region, that is in the region of the entry of the arc into the arc quenching plate package, by a web or a barrier 44 and 46.
  • FIG. 2 shows the deion sheet 21 with its sheet cutout 22 in order to indicate how the covering according to FIG. 2 is attached to the arc quenching sheet packet.
  • FIG. 2a shows how the sheathing is integrated in the arc-quenching plate package, the arc that is just entering the arc-quenching plate package having the reference number 223.
  • FIG. 3 shows a configuration similar to that in FIG. 2.
  • An envelope with an upper plate 60 and a lower plate 62, which are connected to one another by means of a connecting web 64, which Ver binding web is perforated by means of slots 66.
  • Keyhole-like recesses 68 and 70 which are similar to the recesses according to FIG. 2, are likewise made in the plates 60 and 62.
  • the webs 76, 78 can be offset to the rear in the arc running direction, as shown in FIG the recesses 68 and 70 are aligned U-shaped cutouts 80 and 82 are formed.
  • the extensions can also be circular. These have the reference numbers 72 and 74.
  • the arrangement of the webs (76, 78) ensures that the base points of the arc 223 (FIG. 2a) can enter further into the sheet metal cutout or into the recess 22 and thus the column of the arc 223 is more sensitive to the magnetic effect of the arc stack 18 to 21 are exposed. This results in a faster and safer arc entry.
  • the slots 66 are arranged such that they lie between two arc-quenching plates; they are arranged one above the other in two adjacent rows, the rows running parallel to one another in the stacking direction next to one another.
  • the slots in the opposite rows are offset from one another in such a way that a slot in one row lies in the area between two slots in the other row.
  • the sheathing is integrated into the arc quenching plate package as shown in FIG. 3a.
  • the arrangement is the same as that of FIG. 2a.
  • the openings 38 according to FIG. 2 are circular.
  • the openings 38 are circular.
  • the openings are also the possibility, as shown in FIG. 3, of designing the openings as slots 66; the effect of these slot-like outlet openings is the same as that of the circular openings.
  • FIG. 4 shows an envelope which is similar to that according to FIG. 3; only between the front web 76 or 78 and the circular extension 72 or 74 is an intermediate web 77 provided, by means of which the risk of reignition is reduced even further by the fact that the arc base points on the guide rails 15 and 16 are sealed off.
  • FIG. 5 shows an embodiment which is similar to that of FIG. 4.
  • the covering has an upper plate 60 and a lower plate 62 with the webs 76, 77 and 78. Between the two plates 60 and 62 there is an intermediate plate 84 which has webs 86 and webs 88 which have the webs 76, 77 and 78 correspond. Otherwise, the recess (without reference number) is designed in the same way as that according to FIGS. 3 and 4; the circular extension can also be replaced by an elliptical extension similar to FIG. 2.
  • the intermediate plate 24 can either be inserted loosely into the arc-quenching plate packet or connected in a suitable manner to the rear area of the gas outlet side.
  • a further improvement is achieved by arranging the intermediate plate, which should be arranged approximately in the middle of the quenching plate stack.
  • the sheath can of course not only be used for arc extinguishing plates in a circuit breaker, but wherever arc extinguishing plates are used to extinguish an arc or to limit a short-circuit current. This can be the case with circuit breakers, contactors and similar electrical switching devices.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Claims (6)

1. Dispositif d'extinction d'un arc électrique, en particulier pour disjoncteur de protection pour lignes comportant au moins une pièce de contact fixe (12) et au moins une pièce de contact mobile (13) entre lesquelles, par exemple dans le cas d'une rupture de contact provoquée par un courant de court-circuitage, est tendu un arc électrique (221, 222) qui est dirigé en vue de son extinction, par l'intermédiaire d'au moin une tôle (15) conductrice d'arcs électriques raccordée à l'une des pièces de contact (12,13), vers un empilement de tôles (18 à 21) de soufflage d'arcs électriques, cet empilement étant entouré par une enveloppe (30) qui obture en plus le côté sortie de cet empilement de tôles (18 à 21) de soufflage d'arcs électriques et présente dans cette région des orifices (36, 38) de sortie des gaz, caractérisé par le fait que l'enveloppe (30) est de configuration en U, c'est-à-dire qu'elle comprend deux plaques (32, 60; 34, 62) formant les branches du U et une aile de jonction (36, 64) qui relie entre elles ces plaques et est percée des orifices (38, 66) de sortie des gaz; par le fait que les deux plaques (32, 34; 60, 62) emprisonnent entre elles l'empilement de tôles (18 à 21) de soufflage d'arcs électriques en s'étendant parallèlement à ces tôles de soufflage, l'aile de jonction (36, 64) venant s'appliquer au-dessus du côté par lequel les gaz sortent dudit empilement de tôles (18 à 21) de soufflage d'arcs électriques; et par le fait que les plaques (32, 34; 60, 62) comportent des évidements oblongs (40, 42; 72, 74) qui s'étendent dans la direction de pénétration de l'arc électrique, sont fermés circonférentiellement et sont configurés de telle façon qu'une membrure (44,46; 76, 78) du matériau constituant les plaques, située perpendiculairement à la direction de pénétration de l'arc électrique, subsiste dans la zone d'entrée de l'arc électrique dans l'empilement des tôles de soufflage (18 à 21).
2. Dispositif selon la revendication 1, caractérisé par le fait que la membrure (76, 78) sur les plaques (60, 62) est décalée vers l'intérieur dans la direction de pénétration de l'arc électrique, de telle façon que, avant les évidements (72, 74), il soit donné naissance à une échancrure respective (80, 82) ouverte vers l'avant sur les côtés desdites plaques par lesquels les arcs électriques pénètrent.
3. Dispositif selon la revendication 2, caractérisé par le fait que les évidements oblongs des plaques sont subdivisés par au moins une autre membrure (77) formée par le matériau constituant lesdites plaques et s'étendant perpendiculairement à la direction de pénétration des arcs électriques.
4. Dispositif selon l'une des revendications précédentes, caractérisé par le fait qu'il est prévu, entre les deux plaques s'étendant parallèlement aux tôles de soufflage des arcs électriques, une plaque intercalaire (84) dont la forme correspond à celle des deux plaques externes.
5. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que les orifices de sortie des gaz sont réalisés sous la forme de fentes ou de trous circulaires ménagés dans la région située entre les tôles de soufflage des arcs électriques.
6. Dispositif selon l'une des revendications précédentes, caractérisé par le fait que l'enveloppe est confectionnée en une matière à dégagement gazeux électronégatif.
EP81108168A 1980-11-08 1981-10-10 Dispositif d'extinction d'arc éléctrique, notamment pour disjoncteur de protection Expired EP0051756B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108168T ATE13108T1 (de) 1980-11-08 1981-10-10 Lichtbogenloescheinrichtung, insbesondere fuer einen leitungsschutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3042168 1980-11-08
DE19803042168 DE3042168A1 (de) 1980-11-08 1980-11-08 Leitungsschutzschalter

Publications (2)

Publication Number Publication Date
EP0051756A1 EP0051756A1 (fr) 1982-05-19
EP0051756B1 true EP0051756B1 (fr) 1985-05-02

Family

ID=6116278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108168A Expired EP0051756B1 (fr) 1980-11-08 1981-10-10 Dispositif d'extinction d'arc éléctrique, notamment pour disjoncteur de protection

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EP (1) EP0051756B1 (fr)
AT (1) ATE13108T1 (fr)
DE (1) DE3042168A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD253323A1 (de) * 1986-10-06 1988-01-13 Hermsdorf Keramik Veb Leitungsschutzschalter
DE9004895U1 (de) * 1990-04-30 1990-06-28 Felten & Guilleaume Energietechnik AG, 5000 Köln Kontakteinrichtung für Fehlerstromschutzschalter
AT404770B (de) * 1993-01-27 1999-02-25 Felten & Guilleaume Ag Oester Lichtbogenlöschkammer für schalter
EP1313117B1 (fr) 2001-11-16 2014-06-04 Abb Ag Dispositif d'extinction d'arc pour un interrupteur électronique
US8168911B2 (en) * 2008-09-19 2012-05-01 General Electric Company Circuit breaker with improved arc quenching
DE102010053507B4 (de) * 2010-12-04 2012-07-05 Abb Ag Installationsschaltgerät mit einer Lichtbogenlöscheinrichtung
DE102016223620A1 (de) * 2016-11-29 2018-05-30 Siemens Aktiengesellschaft Lichtbogenlöschvorrichtung und elektromechanisches Schutzschaltgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1926355B1 (de) * 1969-05-23 1970-11-12 Siemens Ag Lichtbogenl¦schkammer für Niederspannungsleistungsschalter
DE2419656B2 (de) * 1974-04-24 1978-03-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Löschblechstapel, insbesondere für Leitungsschutzschalter, der auf einen Isolierstoffträger aufgeheftet ist
DE2616825C3 (de) * 1976-04-15 1981-07-02 Brown, Boveri & Cie Ag, 6800 Mannheim Leitungsschutzschalter
DE2716619C2 (de) * 1977-04-15 1979-05-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Strombegrenzender Leitungsschutzschalter mit Maßnahmen zur Erhöhung der Laufgeschwindigkeit des Schaltlichtbogeits

Also Published As

Publication number Publication date
DE3042168A1 (de) 1982-06-16
EP0051756A1 (fr) 1982-05-19
ATE13108T1 (de) 1985-05-15
DE3042168C2 (fr) 1989-03-02

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