EP0217106B1 - Dispositif d'extinction pour disjoncteur de puissance tout courant - Google Patents

Dispositif d'extinction pour disjoncteur de puissance tout courant Download PDF

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Publication number
EP0217106B1
EP0217106B1 EP86111603A EP86111603A EP0217106B1 EP 0217106 B1 EP0217106 B1 EP 0217106B1 EP 86111603 A EP86111603 A EP 86111603A EP 86111603 A EP86111603 A EP 86111603A EP 0217106 B1 EP0217106 B1 EP 0217106B1
Authority
EP
European Patent Office
Prior art keywords
quenching
arc
slot
laminations
tongues
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
EP86111603A
Other languages
German (de)
English (en)
Other versions
EP0217106A2 (fr
EP0217106A3 (en
Inventor
Werner Dipl.-Ing. Ostermann
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
Priority to AT86111603T priority Critical patent/ATE68629T1/de
Publication of EP0217106A2 publication Critical patent/EP0217106A2/fr
Publication of EP0217106A3 publication Critical patent/EP0217106A3/de
Application granted granted Critical
Publication of EP0217106B1 publication Critical patent/EP0217106B1/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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • 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

Definitions

  • the invention relates to an extinguishing device for a circuit breaker, in particular an all-current circuit breaker with a stack of a plurality of ferromagnetic quenching plates, spaced apart in a housing chamber, each with a funnel-shaped V-slot forming two protruding tongues on its narrow side facing a contact point are provided, and with two transversely arranged in front of the quenching plates, lying on both sides of the V-slot on the tongues on the front side and flanking the contact point, at least one of which covers a permanent magnet.
  • the arc voltage must exceed the maximum driving voltage in order to interrupt the circuit.
  • the arc burn time the longer the ratio of the arc voltage to the voltage to be driven and the greater the time constant T as the ratio of the self-inductance L to the resistance R of the circuit to be protected. Since the number of quenching plates is fixed for a switch or a certain number of quenching plates is required in order to interrupt the applied voltage, the level of the arc voltage is also approximately fixed, and the first-mentioned ratio can be assumed as a constant value. The second ratio is dependent on the circuit, so that a higher self-inductance causes a correspondingly longer arc burning time in the stack of quenching plates.
  • partial arcing can occur, particularly when the current intensity decreases at the end of the shutdown to the edges of the extinguishing plates and in the direction of the permanent magnet. It easily burns or the arc flashes over several quenching plate distances. This case is particularly critical with direct current and leads to the failure of the switch. Furthermore, the arc is only surrounded by a little iron on the narrow tongue ends, so that it remains on the inner contours of the V-slot.
  • An extinguishing device of the type mentioned at the outset is known (DE-0S 33 37 562), in which the extinguishing plates are provided with a step in the tongues on each side of the V-slot.
  • the insulating material plate covering a permanent magnet, as a result of which a channel-like depression is formed in front of the contour of the extinguishing plate.
  • the insulating plate also covers the end face of the permanent magnet with an angular extension projecting in the direction of the housing wall. This arrangement is particularly useful for extinguishing the switching arc at comparatively low levels Direct currents up to about 30 A are an advantage. Above such a current, however, such measures are not sufficient to safely extinguish the arc in the case of DC cutoffs.
  • a circuit breaker with an extinguishing device is known (DE-0S 26 16 825), in which at least one of the extinguishing plates is covered with an insulating material and partially covers it. It is thereby achieved that the base point of the arc can only burn on the free area of the quenching plate and the risk of a short-circuiting or bridging of this quenching plate by the arc is reduced.
  • This known quenching device in which the arc at the end of the V-slot is to be stabilized by an insulating sheath of the entire stack of quenching plates, preferably lying on the outer quenching plates, is suitable for an AC switch.
  • the partial arcs can join together at the edge contours of the inside quenching plates and short-circuit part of the quenching plates. Such a burning of the arc leads to failure of the switch, especially with direct current.
  • the invention is based, to improve the effectiveness of the above-mentioned quenching device for an all-current circuit breaker in order to obtain a higher DC switching capacity, in particular for direct currents with a high time constant, the task.
  • the extinguishing device shown as a section of a circuit breaker is accommodated in a housing chamber 1 formed from a lower part 1a and an upper part 1b, which is largely filled by a stack of preferably 12 pieces of ferromagnetic quenching plates 2 spaced apart from one another.
  • a housing chamber 1 formed from a lower part 1a and an upper part 1b, which is largely filled by a stack of preferably 12 pieces of ferromagnetic quenching plates 2 spaced apart from one another.
  • a housing chamber 1 formed from a lower part 1a and an upper part 1b, which is largely filled by a stack of preferably 12 pieces of ferromagnetic quenching plates 2 spaced apart from one another.
  • an insulating plate 5 underneath and an insulating plate 6 above are flanking in front of the extinguishing plates.
  • the quenching plates 2 standing next to each other in a packet each have a funnel-shaped V-slot 2a at their narrow end edges facing the contact point, which is approximately in the middle of each quenching plate in one Narrowing 2a 'passes.
  • tongues 2b, 2c remain on both sides of the V-slot, which protrude in the direction of the insulating material plates.
  • the tongues are flush on their outer longitudinal edges 2d with the rest of the fire-extinguishing plate and are therefore in contact with the housing walls of the lower part or upper part with only a slight gap.
  • the extinguishing plates with their rear narrow side 2e rest against a partition wall of the housing chamber 1, in which blow-out openings 1c (not shown in detail) are cut out.
  • Fig. 1 it can also be seen that the front edges of the quenching plates facing the arc chamber are provided with a gradation 2b '' and 2c '' on both tongues 2b and 2c.
  • a channel-like depression 2a ′′ is formed in particular between the fire-fighting sheet contour below the V-slot and the end face of the lower insulating material plate 5 facing the fire-fighting sheets, which protrudes with an angular projection 5a and covers a permanent magnet 9.
  • the permanent magnet 9 only inserted into the lower part of the housing is completely covered towards the contact point by the insulating material plate 5 and is protected from damage by the arc both on its surface and on its end edges, in particular by the attachment 5a resting on the edge of the fire-extinguishing plate. Similar to the entire insulating material plate 6, the insulating material plate 5 is flat in the area of the contact point, while it has a step-like thickening towards the extinguishing plates on its upper side facing away from the permanent magnet (FIG. 4).
  • This thickening consists of a first step 5b reaching above the opening of the V-slot in front of the larger part of the quenching plates and a second step 5c which is higher than this in the area between the fixed contact piece 3 and the remaining quenching plates.
  • the second stage 5c extends approximately to the middle of the V-slot and lies against the side of an arc discharge horn 3a of the fixed contact piece 3.
  • the resulting switching arc 7 is therefore inevitably raised on its way into the stack of quenching iron with its base point migrating on the arc discharge horn through the second stage 5c up to approximately the central plane of the quenching device.
  • Both stages expediently emerge with a bevel from the flat area 5d of the insulating material plate 5. Since the second stage 5c runs approximately parallel to the arc discharge horn in the plane of FIG. 2, the first stage 5b widens in a funnel shape towards the quenching plates. This improves the entry of the arc into the quenching plate package.
  • a return potential plate 10 connected to the fixed contact piece 3, which is electrically conductively connected to an input terminal 11 in a manner not shown, and an arc guide plate 12 located at the bottom of the housing chamber.
  • This in parallel Arc guide plate running to an outer extinguishing plate is guided in the region of the arc space in the direction of the movable contact piece 4 for good takeover of its arc base and carries a bimetal 13 as a thermal trigger at its free end 12a. This is via a connecting line 15 connected in series with a connecting terminal 14 and via a flexible line 16 with the movable contact piece 4.
  • the direction of flow of the direct current is indicated by arrows in FIG. 2 and leads from the connection terminal 11 to the fixed contact piece 3 and further via the movable contact piece 4, the line 16, the bimetal 13 and the line 15 to the other connection terminal 14.
  • a direct current flows through the switching arc 7, which under the effect of the magnetic field of the permanent magnet 9 shown schematically in FIG. 1, effectively flows into the V-slot even at currents above approximately 30 A via the steps of the lower insulating plate 5 2a of the sheet stack is directed.
  • the latter can enter the narrowing 2a 'of the V-slot in the critical current range from approximately 30 to 100 A via indicated intermediate positions 7a, 7b, 7c.
  • This process is further supported by the larger air gap to the magnet due to the lower insulating material plate thickened in front of the extinguishing plates.
  • the quenching device according to the invention also allows a higher AC cut-off capacity. This is achieved insofar as the demagnetization of the permanent magnet 9 takes place in the region important for direct current cutoffs due to the step-like thickening of the lower insulating material plate 5 when the current flows in the opposite direction.
  • the arc barriers can also be provided by means of appropriate housing webs which grip between the quenching plates or by local insulation directly on the surface of the quenching plates in the zones in which the teeth 8a grip over the tongues 2b or 2c. Adhesive strips, lacquer or corresponding materials can be used for this local insulation.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)

Claims (9)

  1. Dispositif d'extinction pour un disjoncteur de puissance, en particulier un disjoncteur de puissance tout courant avec une pile de plusieurs tôles d'extinction (2) ferromagnétiques situées les unes à côtés des autres, avec un écartement, dans une chambre de boîtier, et qui sont munies chacune, sur leur tranche adjacente à un point de contact, d'une fente (2a) en V en entonnoir formant deux langues saillantes, et avec deux plaques isolantes (5) disposées transversalement devant les tôles d'extinction, appliquées par leur face frontale aux langues, des deux côtés de la fente en V, et flanquant le point de contact, plaques isolantes dont au moins une recouvre un aimant permanent (9), caractérisé en ce que les différentes tôles d'extinction (2) sont munies approximativement dans la zone médiane de leurs langues (2b, 2c), sur leur surface à partir de deux bords longitudinaux extérieurs (2d) jusqu'à la fente en V (2a), de dispositifs de blocage (8) d'arc électrique étroits et isolants, de telle sorte que le retour d'arc éléctrique des racines des arcs électriques partiels (7d, 7e) est empêché par la zone plane des tôles d'extinction (2) dans laquelle se trouve le rétrécissement (2a'), à l'extrémité de la fente en V (2a) en direction des parties des langues (2b, 2c) situées devant les dispositifs de blocage (8) de l'arc électrique.
  2. Dispositif d'extinction selon la revendication 1, caractérisé en ce que les dispositifs de blocage de l'arc électrique sont formés chacun par une pièce intercalaire (8) isolante en forme de peigne, située entre les tôles d'extinction (2), avançant des deux côtés de la pile, et dont les dents (8a) remplissent les fentes entre les surfaces des différentes langues (2b, 2c) jusqu'à la fente en V (2a), le dos du peigne (8b) étant conduit au-delà des bords longitudinaux (2d) munis d'une encoche (2b', 2c') des tôles d'extinction (2).
  3. Dispositif d'extinction selon la revendication 1, caractérisé en ce que les dispositifs de blocage de l'arc électrique sont formés au moyen de traverses étroites de boîtier, appliquées en saillie sur les parois de la chambre du boîtier (1) et remplissant chacune les fentes entre les langues (2b, 2c) des différentes tôles d'extinction (2) jusqu'à la fente en V (2a).
  4. Dispositif d'extinction selon la revendication 1, caractérisé en ce que les dispositifs de blocage de l'arc électrique sont formés par des isolations locales limitées sur les surfaces des langues (2b, 2c) au moyen de bandes adhésives, de laque ou d'isolants similaires.
  5. Dispositif d'extinction selon l'une des revendications 1 à 4, caractérisé en ce qu'une plaque isolantes (5) recouvrant l'aimant permanent (9) et faisant saillie avec un élément (5a) jusqu'à la paroi du boîtier de la chambre d'extinction (1), recouvre une surface extérieure de l'aimant permanent (9) devant le contour frontal des tôles d'extinction (2), et en ce que la plaque isolante (5) est conçue, au-dessus de l'aimant permanent (9), à partir de la zone plane (5d) qui flanque le point de contact (3, 4) jusqu'aux tôles d'extinction (2), avec un épaississement (5b, 5c) montant en escalier.
  6. Dispositif d'extinction selon la revendication 5, caractérisé en ce que, devant environ trois quarts du nombre des tôles d'extinction (2) qui sont plus éloignées d'une pointe d'arc électrique (3a) du plot de contact fixe (3), l'épaississement en escalier monte à partir de la zone plane (5d), lors du passage oblique, dans un premier plot de contact (5b).
  7. Dispositif d'extinction selon l'une des revendications 5 et 6, caractérisé en ce que, dans la zone située derrière la pointe de l'arc électrique (3a), l'épaississement en escalier (5b,5c) est formé, devant approximativement le quart restant des tôles d'extinction (2) par un deuxième plot de contact (5b) surélevé par rapport au premier (5c) et qui s'étend pratiquement Jusqu'au plan médian de la pointe de l'arc éléctrique (3a) et donc également de la fente en V (2a).
  8. Dispositif d'extinction selon l'une des revendications 5 à 7, caractérisé en ce que la plaque isolante (5) flanque latéralement le plot de contact fixe (3) avec la zone plane (5b) et est amenée directement avec le deuxième plot de contact épaissi (5c) sur la pointe de l'arc électrique (3a).
  9. Dispositif d'extinction selon l'une des revendications 5 à 8, caractérisé en ce que le deuxième plot de contact (5c) de l'épaississement est guidé obliquement et pratiquement parallèlement à la pointe de l'arc électrique (3a) et en ce que, par conséquent, le premier plot de contact (5b) est élargi en forme de trapèze vers les tôles d'extinction (2).
EP86111603A 1985-08-30 1986-08-22 Dispositif d'extinction pour disjoncteur de puissance tout courant Expired - Lifetime EP0217106B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111603T ATE68629T1 (de) 1985-08-30 1986-08-22 Loescheinrichtung fuer einen allstromleitungsschutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3531040A DE3531040C1 (de) 1985-08-30 1985-08-30 Loescheinrichtung fuer einen Allstrom-Leitungsschutzschalter
DE3531040 1985-08-30

Publications (3)

Publication Number Publication Date
EP0217106A2 EP0217106A2 (fr) 1987-04-08
EP0217106A3 EP0217106A3 (en) 1989-06-28
EP0217106B1 true EP0217106B1 (fr) 1991-10-16

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ID=6279774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111603A Expired - Lifetime EP0217106B1 (fr) 1985-08-30 1986-08-22 Dispositif d'extinction pour disjoncteur de puissance tout courant

Country Status (3)

Country Link
EP (1) EP0217106B1 (fr)
AT (1) ATE68629T1 (fr)
DE (2) DE3531040C1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
DE102007054960B3 (de) * 2007-11-17 2009-04-23 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
EP2061053A2 (fr) 2007-11-17 2009-05-20 Moeller GmbH Commutateur destiné à des applications à courant continu
CN116895489A (zh) * 2023-05-26 2023-10-17 浙江金莱勒电气有限公司 一种dc1500v灭弧系统及生产该灭弧系统的生产工艺

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KR910001537B1 (ko) * 1987-04-21 1991-03-15 미쓰비시전기 주식회사 회로차단기
DE3803849C1 (en) * 1988-02-09 1989-08-10 Flohr, Peter, Dipl.-Ing., 7790 Messkirch, De High-power switching path for protective switching devices
DE3824025C2 (de) * 1988-07-15 1994-02-17 Asea Brown Boveri Niederspannungsschaltgerät
FI87614C (fi) * 1991-05-06 1993-01-25 Abb Stroemberg Saehkoenjakelu Slaeckningsanordning foer ljusbaoge foer en kopplingsapparatur
ATE123589T1 (de) * 1992-09-07 1995-06-15 Siemens Ag Selbstschalter, beispielsweise leistungsschutzschalter.
DE29620519U1 (de) * 1996-11-25 1997-02-06 Heinrich Kopp Ag, 63796 Kahl Kontaktanordnung für Fehlerstromschutzschalter
DE19757332C1 (de) 1997-12-22 1999-07-22 Siemens Ag Lichtbogenlöscheinrichtung für ein Schaltgerät
DE102004022194B4 (de) * 2004-05-05 2013-01-03 Abb Ag Lichtbogenlöscheinrichtung für einen Leitungsschutzschalter
FR2873511B1 (fr) 2004-07-21 2006-12-29 Soule Prot Surtensions Sa Dispositif de protection contre les surtensions, les surcharges ou les courts-circuits a pouvoir de coupure ameliore
DE102005007282A1 (de) * 2005-02-17 2006-08-24 Abb Patent Gmbh Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Vorkammerplatten und strombegrenzender Lichtbogenlöscheinrichtung
FR2916571B1 (fr) * 2007-05-22 2009-09-11 Schneider Electric Ind Sas Chambre de coupure et disjoncteur equipe d'une telle chambre de coupure
FR2923649B1 (fr) * 2007-11-13 2009-12-11 Schneider Electric Ind Sas Chambre de coupure et disjoncteur equipe d'une telle chambre de coupure.
EP3389070A1 (fr) * 2017-04-13 2018-10-17 ABB Schweiz AG Chambre d'arc pour un disjoncteur à courant continu
CN114582665B (zh) * 2022-01-29 2024-03-12 上海京硅智能技术有限公司 隔离开关触头极

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EP0138174B1 (fr) * 1983-10-15 1987-09-16 Licentia Patent-Verwaltungs-GmbH Dispositif d'extinction pour un interrupteur automatique
DE3337562A1 (de) * 1983-10-15 1985-04-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Loescheinrichtung fuer einen leitungsschutzschalter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007054960B3 (de) * 2007-11-17 2009-04-23 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
EP2061053A2 (fr) 2007-11-17 2009-05-20 Moeller GmbH Commutateur destiné à des applications à courant continu
EP2061052A2 (fr) 2007-11-17 2009-05-20 Moeller GmbH Dispositif de commutation destiné à applications en courant continu
DE102007054958A1 (de) 2007-11-17 2009-06-04 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
CN116895489A (zh) * 2023-05-26 2023-10-17 浙江金莱勒电气有限公司 一种dc1500v灭弧系统及生产该灭弧系统的生产工艺
CN116895489B (zh) * 2023-05-26 2024-01-02 浙江金莱勒电气有限公司 一种dc1500v灭弧系统及生产该灭弧系统的生产工艺

Also Published As

Publication number Publication date
EP0217106A2 (fr) 1987-04-08
EP0217106A3 (en) 1989-06-28
ATE68629T1 (de) 1991-11-15
DE3682012D1 (de) 1991-11-21
DE3531040C1 (de) 1987-06-04

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