EP0387761A2 - Interrupteur automatique, en particulier disjonctueur de protection de ligne - Google Patents

Interrupteur automatique, en particulier disjonctueur de protection de ligne Download PDF

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Publication number
EP0387761A2
EP0387761A2 EP90104653A EP90104653A EP0387761A2 EP 0387761 A2 EP0387761 A2 EP 0387761A2 EP 90104653 A EP90104653 A EP 90104653A EP 90104653 A EP90104653 A EP 90104653A EP 0387761 A2 EP0387761 A2 EP 0387761A2
Authority
EP
European Patent Office
Prior art keywords
arc
columns
webs
contact
switch according
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.)
Granted
Application number
EP90104653A
Other languages
German (de)
English (en)
Other versions
EP0387761B1 (fr
EP0387761A3 (fr
Inventor
Werner Dipl.-Ing. Ostermann
Jürgen Dipl.-Ing. Orzechowski
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.)
AEG Niederspannungstechnik GmbH and Co KG
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
Priority claimed from DE19893908102 external-priority patent/DE3908102A1/de
Priority claimed from DE19904007606 external-priority patent/DE4007606A1/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0387761A2 publication Critical patent/EP0387761A2/fr
Publication of EP0387761A3 publication Critical patent/EP0387761A3/fr
Application granted granted Critical
Publication of EP0387761B1 publication Critical patent/EP0387761B1/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
    • 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a circuit breaker according to the preamble of claim 1, in particular a circuit breaker in a narrow construction.
  • Such switches with specially designed quenching chambers are known in a variety of designs. For example, reference is made to the subject matter of DE-PS 1 185 269 and DE-PS 1 185 274.
  • the known switches contain within their insulating material housing an arc chamber assigned to the contact point with quenching plates in order to effectively extinguish the switching arc that arises in the event of a short-circuit shutdown.
  • a circuit breaker with integrated arc guiding means in the prechamber area consist of oppositely formed rows of ribs on the housing inner walls of the arc chamber.
  • a central channel remains between the rows of ribs, which have a tree-like structure or can also be formed as individual straight walls.
  • they are surrounded by grooves or notches, which in turn contain a deionized cold gas reserve and are intended to ensure gas recirculation in the direction of the contact zone when switched off.
  • the rib rows which are located freestanding in the middle of the prechamber area, only widen the creepage distance between the contacts, without the arc and the arc gases being guided in a targeted manner.
  • the shape and position of the grooves are essentially matched to the fact that a uniform thickness of the ribs is maintained in order to exclude cavities and unevenness in the housing parts. Design and press engineering measures are therefore in the foreground when designing the rib rows of this switch. Optimized gas recirculation and a rapid discharge of the switching arc from the contact point into the quenching plates, however, are not guaranteed with such a quenching chamber.
  • the invention has for its object to simplify the quenching chamber within its prechamber area in a self-switch of the aforementioned type, and to provide improved arc guidance and to bring about a particularly low flow resistance in the prechamber space, so that a quick and safe flow of the switching arc from the contact point into the Extinguishing sheet stack is ensured.
  • the design of the quenching chamber according to the invention is advantageous in that the switching arc, which is driven by the magnetic field of the arc guide rails, is narrowly delimited laterally between protruding tops of webs which are closely adjacent there and from end faces of a plurality of columns or pegs distributed in the antechamber space and runs in a narrow gap.
  • this results in high arc acceleration with low gas pressure.
  • the drive effect of the gas-emitting material of the webs and columns is used in a targeted manner in order to exert an additional drive on the arc. With closed side panels, however, this effect is usually too strong.
  • the gas pressure arising in front of the wandering arc can stretch ent in the free spaces between the columns, so that the switching arc finds only a slight flow resistance in the direction of the quenching plates and can thus run quickly and safely from the contact point.
  • a possibly inhibiting pressure difference in front of and behind the arc is effectively compensated for by backflow of the gases between the columns.
  • This pressure equalization also ensures good deionization of the area at risk of ignition at the contact point behind the arc.
  • the web-like sealing walls enlarge the creepage distances at the contact point. Since the web edges are only slightly loaded by the arc, there is a high insulation resistance even when the contacts are open.
  • the miniature circuit breaker has a housing (1) which is composed of two housing shells (1a, 1b) and which accommodates a switching and triggering mechanism (2), which is only indicated, in the upper part.
  • the housing (1) made of thermosetting or thermoplastic molding compound is predominantly designed as an extinguishing chamber (3), which is largely filled with an extinguishing sheet stack (4) arranged parallel to the bottom surface (1c) of the switch.
  • the depth of the Extinguishing chamber between their at the inner side surfaces (3a, 3b) is predetermined, based on the standardized switch width, through outer walls of the housing (1a ', 1b') in the wall thickness that is customary in terms of production technology.
  • arc guiding rails (6) and (7) which in turn are in the area a contact arrangement (5) located in the prechamber space (3c) of the arcing chamber.
  • the contact point with a single break on the right upper edge of the quenching chamber in the approximately funnel-shaped prechamber space (3c) consists of a fixed contact piece (5a) which is connected to an output terminal (11) via current-carrying parts (10a) and a trigger coil (10), and one by one Fixed axis swiveling contact lever (5b). This is connected to an input terminal (13) via movable lines (12a, 12b) with the inclusion of a thermal release (12) and pivots counterclockwise when it is switched off.
  • Fixed contact piece (5a) and contact lever (5b) form an approximately U-shaped current loop at the actual contact contact point together with their current supply lines, which is oriented perpendicular to the direction of the quenching plates (4a).
  • the individual quenching plates have an approximately V-shaped incision (4b) on their front side facing the pre-chamber space (3c) and improve the arc run-in (4b) and cover the entire open cross-section of the pre-chamber space, which is mainly enclosed by wall parts (1e), to the other housing areas from. Only a recess required for the pivoting movement of the contact lever (5b) is recessed in the wall parts (1e), so that the antechamber (3c) in connection with the arc guide rails (6, 7) is designed to be almost pressure-tight to the switching and triggering mechanism.
  • the upper web (3d) is tight on the fixed contact piece (5a) and follows its contact horn (5a ') on the side facing the prechamber space up to the quenching chamber wall in the area of the upper arc runner (6). Together they include Crosspieces (3d) of both housing shells the fixed contact piece on the contact side and on both narrow sides such that in the middle between the crosspieces (3d) practically only a gap corresponding to the width of the contact lever (5b) remains free along the arcing horn (5a ').
  • Another main feature of the invention is a plurality of columns or pins (3f) arranged in the prechamber space (3c) - still referred to only as columns - which are arranged approximately evenly distributed in the free cross section between the webs (3d, 3e).
  • the columns (3f) which are round or square in cross-section, have an approximately equal distance from the webs (3d, 3e) and from one another and each extend from the side surfaces (3a, 3b) to almost the pivoting plane of the contact lever (5b), see above that only a narrow gap between their end faces (3f ') continuously remains free.
  • the columns (3f) are preferably arranged in a slight zigzag offset to a middle ideal line between the two webs (3d, 3e) from the contact area in the direction of the fire-extinguishing sheet end faces, but can also be arranged directly in a row on this ideal line.
  • two columns are ideally arranged only in the funnel-shaped area directly in front of the quenching plates (4a) (FIGS. 1, 3).
  • seven columns (3f) are formed on each housing half-shell (1a, 1b) directly during the manufacture of the housing parts, the columns preferably being slightly frustoconical in shape with an average diameter of approximately 2 mm and a height of approximately 6 mm.
  • the arrangement of the columns (3f) is of the type mentioned Criteria with dependent.
  • the number of columns on each housing part will essentially depend on the size of the prechamber space, while their position should be distributed as evenly as possible between the contact point area and the fire-extinguishing sheet end faces.
  • the column groups are in the two housing shells arranged offset to gap, as is indicated in particular in Fig. 2.
  • the existing expansion space and the flow channels around the columns also ensure a lower gas pressure, which in turn reduces the ion concentration and reduces the risk of reignitions behind the arc.
  • the space behind the fixed contact piece (5a) can serve as a kind of buffer and as a cooling air mass reserve, if the web (3d) which surrounds the contact horn up to the upper arc runner (6) ends approximately with the top of the contact point - this leaves between the end of the contact point Web (3d) and the wall part (1e) a cross-flow channel (8 '), which enables pressure equalization above the contact point to the actual antechamber (3c).

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Circuit Breakers (AREA)
  • Shearing Machines (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP90104653A 1989-03-13 1990-03-12 Interrupteur automatique, en particulier disjonctueur de protection de ligne Expired - Lifetime EP0387761B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19893908102 DE3908102A1 (de) 1989-03-13 1989-03-13 Selbstschalter, insbesondere leitungsschutzschalter
DE3908102 1989-03-13
DE4007606 1990-03-09
DE19904007606 DE4007606A1 (de) 1990-03-09 1990-03-09 Selbstschalter, insbesondere leitungsschutzschalter

Publications (3)

Publication Number Publication Date
EP0387761A2 true EP0387761A2 (fr) 1990-09-19
EP0387761A3 EP0387761A3 (fr) 1992-01-29
EP0387761B1 EP0387761B1 (fr) 1994-12-14

Family

ID=25878766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104653A Expired - Lifetime EP0387761B1 (fr) 1989-03-13 1990-03-12 Interrupteur automatique, en particulier disjonctueur de protection de ligne

Country Status (5)

Country Link
EP (1) EP0387761B1 (fr)
AT (1) ATE115767T1 (fr)
DE (1) DE59007970D1 (fr)
ES (1) ES2065420T3 (fr)
HK (1) HK64895A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1017072A2 (fr) * 1998-12-28 2000-07-05 ABBPATENT GmbH Dispositif de commutation électrique, en particulier un disjoncteur de protection
CN103441049A (zh) * 2013-09-06 2013-12-11 华坤电气有限公司 一种加强自励磁场强度的引弧结构
CN105185671A (zh) * 2015-10-30 2015-12-23 上海电科电器科技有限公司 断路器及其挡板
CN106104741A (zh) * 2014-03-31 2016-11-09 松下知识产权经营株式会社 断路器
CN106783294A (zh) * 2016-11-30 2017-05-31 金平娣 一种电力断路器的机械挤压式灭弧机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158124A2 (fr) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction d'arc pour interrupteurs électriques
FR2575861A1 (fr) * 1985-01-07 1986-07-11 Merlin Gerin Disjoncteur electrique miniature a chambre de formation d'arc
DE3619241A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Loescheinrichtung fuer einen leitungsschutzschalter
EP0251160A2 (fr) * 1986-06-27 1988-01-07 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction pour disjoncteurs électriques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158124A2 (fr) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction d'arc pour interrupteurs électriques
FR2575861A1 (fr) * 1985-01-07 1986-07-11 Merlin Gerin Disjoncteur electrique miniature a chambre de formation d'arc
DE3619241A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Loescheinrichtung fuer einen leitungsschutzschalter
EP0251160A2 (fr) * 1986-06-27 1988-01-07 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction pour disjoncteurs électriques

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1017072A2 (fr) * 1998-12-28 2000-07-05 ABBPATENT GmbH Dispositif de commutation électrique, en particulier un disjoncteur de protection
EP1017072A3 (fr) * 1998-12-28 2001-07-18 ABBPATENT GmbH Dispositif de commutation électrique, en particulier un disjoncteur de protection
CN103441049A (zh) * 2013-09-06 2013-12-11 华坤电气有限公司 一种加强自励磁场强度的引弧结构
CN103441049B (zh) * 2013-09-06 2015-07-22 浙江大华电气有限公司 一种加强自励磁场强度的引弧结构
CN106104741A (zh) * 2014-03-31 2016-11-09 松下知识产权经营株式会社 断路器
CN106104741B (zh) * 2014-03-31 2018-08-24 松下知识产权经营株式会社 断路器
CN105185671A (zh) * 2015-10-30 2015-12-23 上海电科电器科技有限公司 断路器及其挡板
CN106783294A (zh) * 2016-11-30 2017-05-31 金平娣 一种电力断路器的机械挤压式灭弧机构
CN108281334A (zh) * 2016-11-30 2018-07-13 金平娣 一种电力断路器机械挤压灭弧机构
CN108281334B (zh) * 2016-11-30 2018-12-28 杭州曼京科技有限公司 一种电力断路器机械挤压灭弧机构

Also Published As

Publication number Publication date
ATE115767T1 (de) 1994-12-15
EP0387761B1 (fr) 1994-12-14
EP0387761A3 (fr) 1992-01-29
ES2065420T3 (es) 1995-02-16
DE59007970D1 (de) 1995-01-26
HK64895A (en) 1995-05-05

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