EP0849761B1 - Déclencheur de surintensité et de courtcircuit pour un disjoncteur électrique - Google Patents

Déclencheur de surintensité et de courtcircuit pour un disjoncteur électrique Download PDF

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Publication number
EP0849761B1
EP0849761B1 EP97121381A EP97121381A EP0849761B1 EP 0849761 B1 EP0849761 B1 EP 0849761B1 EP 97121381 A EP97121381 A EP 97121381A EP 97121381 A EP97121381 A EP 97121381A EP 0849761 B1 EP0849761 B1 EP 0849761B1
Authority
EP
European Patent Office
Prior art keywords
coil
yoke
release
limb
bimetallic 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
EP97121381A
Other languages
German (de)
English (en)
Other versions
EP0849761A3 (fr
EP0849761A2 (fr
Inventor
Joachim Dipl.-Ing. Becker
Markus Dipl.-Ing. Lubeley
Richard Dipl.-Ing. Kommert
Klaus-Peter Dipl.-Ing. Eppe
Werner Dipl.-Ing. Bruckner
Rolf Dipl.-Ing. Goehle
Volker Schmitt
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0849761A2 publication Critical patent/EP0849761A2/fr
Publication of EP0849761A3 publication Critical patent/EP0849761A3/fr
Application granted granted Critical
Publication of EP0849761B1 publication Critical patent/EP0849761B1/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • H01H2071/407—Combined electrothermal and electromagnetic mechanisms the thermal element being heated by the coil of the electromagnetic mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to an overcurrent and short-circuit release for an electrical Installation switch, according to the preamble of claims 1 and 3.
  • Miniature circuit breakers for protection against thermal overload and short circuit basically built the same. You have a magnetic trigger for the Short-circuit protection and a thermal release, usually with one Thermobimetal strips, for overload protection.
  • the bimetallic strip is in hereinafter also referred to as bimetal or thermobimetal.
  • the coil of the Magnetic release and the bimetal of the thermal release flows through and heated directly with it.
  • the thermal release trips due to the heat generated by the current a switch mechanism, and in rated operation the current flows through the triggers and that Device heats up due to power loss.
  • the thermal release i.e. the bimetallic strip, additionally with a current-carrying winding made of resistance wire provided, which generates the heating necessary for the deflection.
  • the thermal bimetal is normally designed as a strip bimetal; instead of one Thermobimetal could also use a shape memory alloy strip become.
  • thermomechanical To couple element with the anchor, the anchor in the cooled state of the thermomechanical element is outside the magnetic circuit while it is through the heated thermomechanical element is pushed into the magnetic circuit, but only to the extent that it does not trigger it alone. Only when that The coil mechanism pulls the armature, the switching mechanism is triggered.
  • Arrangements see AT-315 90 B, US-PS 5 001 446) is made of a tether spring Shape memory alloy used, which is arranged in the coil tube of the trip coil is. The coil spring is heated by the coil and expands when it reaches one certain temperature. This moves the anchor, which then moves over you Tappet unlatches the rear derailleur.
  • DE-OS 27 51 451 an arrangement is described in which the parallel to the coil electromagnetic trigger is connected to a bimetal, one end of which is stationary and a contact point is provided at the other end.
  • the arrangement is dimensioned so that the coil of the magnetic release one has significantly higher resistance than thermobimetal.
  • the flows normally Main current over the bimetal parallel to the coil.
  • the contact point on the bimetal opens and the current flows in its entirety over the coil.
  • a trigger amplification achieved with overcurrent and on the other hand a current limitation.
  • the advantage is mentioned by simply adjusting the bimetal to change the thermal release in other areas.
  • a trigger of the type mentioned at the beginning has become known from FR 1 544 977, in which a coil with an armature and a thermal bimetal is provided.
  • the yoke is u-shaped and runs with one leg inside the coil; on this thigh the bimetal is attached, which also reaches through the coil.
  • Thermobimetal is u-shaped, one of the legs with the leg of the yoke and the other leg is connected to a wire end of the winding so that obviously the thermal bimetal is traversed by the current, which is also understandable if you look at the length of the bimetal in relation to the axial extension of the Considered coil.
  • a trigger has become known from EP 0 037 490 A1 in which the thermal Trigger in the form of a strip of shape memory material arranged parallel to the coil is (see Fig. 3). The thermal release is not traversed by the current here.
  • FIGS. 11, 13 and 15 A similar embodiment can also be seen in FIGS. 11, 13 and 15, wherein nothing can be found about the arrangement of a yoke.
  • the object of the invention is through the structural design, arrangement and assignment of thermal release and magnetic release over the entire nominal current range and the different trigger characteristics with a significantly reduced Realize the number of components.
  • thermobimetal is attached directly to the yoke and parallel to the longitudinal axis the coil runs, the space requirement of the two components is reduced and in addition, both components can be practically combined into a single unit become.
  • the thermal release can be outside or inside the yoke lie. Due to the design of the yoke with the two leg webs and The arrangement of the thermal bimetal in the area in between will result in improved heating of the bimetallic metal produced, in which both leg webs for heating of the bimetal.
  • Fig. 8 shows a view of a circuit breaker 10 and that inside of the housing 11, which accommodates the individual components of the circuit breaker.
  • the circuit breaker 10 has a switch lock 12, one from the switch lock driven contact lever 13 which is rotatably mounted about a pivot point 14 and at the free end of a movable contact piece 15 is attached.
  • This movable contact piece 15 cooperates with a fixed contact piece 16 and if an arc occurs during a switching operation between the contact pieces 15 and 16 the arc travels with a base along an arc guide rail 17 in an arc quenching plate packet 18 in which the arc is quenched becomes.
  • the other base point of the arc runs along the shape of the contact piece 16.
  • the hot switching gases flow out through a channel 19.
  • Terminals 20, 21 are provided on opposite narrow sides, and below the key switch 12 are a thermal release 22 and an electromagnetic release 23.
  • the thermal release 22 and the electromagnetic Triggers 23 respond to overcurrent or short-circuit current;
  • the thermal trigger which is designed in the form of a thermobimetal, acts on the Switch lock 12 on the movable contact lever 13;
  • the electromagnetic trigger 23 acts via a magnetic armature 24 directly on the movable contact lever and via a mechanical gear arrangement, not shown, also on the Switch lock so that the contact lever 13 is opened permanently in the event of a short circuit.
  • At the bottom of the housing 11 there is a recess 25 with a fixed one Nose 26 and a movable nose 27 so that the circuit breaker 10 on a top-hat rail (not shown) can be snapped on.
  • a switch toggle 28 is provided for switching on again after a switch-off action. with which the switch can also be switched off manually.
  • the invention is concerned with the assignment of electromagnetic release 23 and thermal trigger 22 to each other.
  • Fig. 8 it is shown that the thermal Trigger 22 between the switch 12 and the electromagnetic trigger 23 is, of course, there is the possibility of relating to the thermal release to be placed in front of or behind the electromagnetic release on the plane of the drawing.
  • 1 to 4 are different configurations of electromagnetic according to the invention Shown with thermal triggers.
  • FIG. 1 and 2 show different views of a first embodiment of a electromagnetic and thermal release.
  • the trigger as the combination is to be called in the following, according to FIG. 1 and 2 has the reference number 30. It has a yoke plate 31 on which a coil former 32 is attached, the inside of a core (not shown) and one Impact anchor 33 and around which a coil 34 is wound. On the yoke plate 31 adjoins a yoke leg 35 running perpendicular to it, which is parallel to The central axis of the coil runs and two parallel webs 36 and 37, which run parallel to the central axis of the coil 34. Are at their ends the webs 36 and 37 by means of a U-shaped connecting piece 38 and 39 connected to each other so that there is a U-shape, which is radial with its open side points away from the coil 34. At the connector 38, see Fig. 2, that is fixed end 41 of a bimetal 40 welded and additionally one end 42 of the coil 34. It can be seen that the fastening point on the outside or coil side of the U-shaped connecting piece 38.
  • the thermal bimetal 40 runs parallel or from the U-shaped connecting piece 38 approximately parallel to the coil axis up to the connecting piece 39 and projects beyond it or its front edge 43 visible at the front in FIG. 1, whereby the free, movable End of the bimetal 44 within the U-shape of the U-shaped connector 39 is located.
  • a conductor 45 is connected on the outer surface of the web 36 near the U-shaped connector 39 and near the bendable end 44 of the bimetal 40 so that a current flow through the conductor 45, the webs 36 and 37 to the connecting piece 38 and from there to the coil 34.
  • the bimetallic strip which is in close proximity to the coil 34 approximately parallel to it The longitudinal axis is not flowed through by the current, but by the coil 34 and also indirectly heated by the webs 36, 37.
  • the bimetallic metal 40 is thus on the yoke limb projecting above the coil 34 attached to the side of the connecting piece 38 pointing towards the coil 34; the Fastening point is therefore between the yoke leg 35 and the coil 34.
  • Das Thermobimetal 40 runs from the free end of the yoke leg 35 to the yoke plate 31 and protrudes above it, the bendable end 44 being outside the connecting piece 39, based on the coil 34 and within the U-shape of the connector 39 is located.
  • a coil 50 is provided, which is assigned a yoke 51, which has a U-shape with different lengths Legs 52 and 53 represents.
  • the bobbin 54 with the core, not shown is arranged perpendicular to the web 51 and runs parallel to the legs 52 and 53 between these.
  • the longer leg 53 which is longer than the coil body 54, has two leg webs 55 and 56, which are connected at their free ends by means of a connecting web 57 are connected.
  • the leg webs 55, 56 lie in one plane. From Fig. 4 it can be seen that the fixed end 58 of a bimetallic metal 59 on the connecting web 57 is welded to the side facing the coil 50; on The thermobimetal 59 is also at the same point an end 60 of the coil wire the coil 50 welded.
  • the thermal bimetal 59 is located between the Thigh bars 55 and 56 and at the fixed, clamped end between the thigh bars 55, 56 and the coil 50. It projects beyond the web 51 with the free end 61 of the yoke.
  • the other end 62 of the coil wire is here on an L-shaped tab 63 attached to the other components, such as a connector or the like. Can be set.
  • the through the coil 50 and through the leg webs 56 and 55 flowing current heats the bimetallic metal 59, so that here too an indirect one Heating takes place.
  • the leg 52 is, as can be seen in Fig. 4, with a Provide pin 64 which runs parallel to the coil axis.
  • the thermal bimetal is in each case indirectly from the coil heat is heated; the current does not flow through the bimetal.
  • 5 to 8 show different electrical interconnections of Coil and bimetal shown.
  • the magnetic release has a yoke 90 on which a bobbin 91 is fixed, around which the coil 92 is wound.
  • the yoke 90 has two legs 93 and 94 of different lengths and on the longer one Leg 93 is attached to a terminal lug 95, on which a bimetal 96th is appropriate.
  • the free end of the bimetal 96, which is in the range of Web 97 of the yoke 90 is with a stranded conductor 98 with an end 99 of the Coil connected.
  • the other end 100 of the coil is connected to the web 97.
  • On the connecting lug 95 connects a connecting conductor 101, the other end of which a terminal 102 is connected.
  • the current flows from line 101 through thermal bimetal 96 to that Stranded conductor 98 and on the other hand via the leg 93, the end 100, through the coil 92 and over the other coil wire end 99 to a branch point 103 which is followed by a continuing conductor 104.
  • the bimetal 96 is connected.
  • the current flows from the Terminal 102 via line 105, coil 92, yoke 90 with leg 93 for Tab 95 and through the bimetal 96, so that in the embodiment according to FIG. 6 the two elements coil, yoke and thermobimetal are connected in series are.
  • the yoke shapes can also be used with these circuit arrangements Legs according to FIGS. 1 to 4 are used.
  • Thermobimetal 96 does not flow through the current, but from the heat of the coil 92 and also indirectly heated by the heat of the yoke leg 93.
  • the yoke is traversed by the current and thus becomes the bimetal from the coil and the yoke leg, in the area of which the thermobimetal is located, heated. Accordingly, the yoke leg must have a certain longitudinal section cover the bimetallic strip, the length being such that the bimetallic strip is sufficiently heated by the yoke.
  • the embodiments according to FIGS. 1 to 4 is the fixed end of the bimetal at the free end of the yoke leg fastened and protrudes from the yoke web running perpendicular to the coil axis.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (8)

  1. Déclencheur à surintensité et à court-circuit pour un disjoncteur d'installation, en particulier pour un disjoncteur de protection de ligne, comprenant un déclencheur thermique sous la forme d'un bilame thermique, ainsi qu'un déclencheur électromagnétique à armature battante, avec une armature battante, une bobine, une culasse et un noyau, la culasse présentant une aile qui s'étend parallèlement à l'axe de bobine et sur laquelle le déclencheur thermique est fixé en étant parallèle à l'axe de la bobine et à l'aile de la culasse du déclencheur électromagnétique, de telle sorte qu'il soit chauffé par la bobine parcourue par le courant et par la culasse parcourue par le courant, caractérisé en ce que l'aile (35) de la culasse parallèle à l'axe de bobine présente deux branches (36, 37) mutuellement parallèles, qui sont reliées à des pièces de liaison (38, 39) conformées en U au niveau de leurs extrémités, en ce que le bilame thermique ainsi qu'une extrémité d'un fil de la bobine sont fixés à l'une des pièces de liaison (38) et s'étendent parallèlement à l'axe de bobine, dans la zone comprise entre les deux branches de l'aile.
  2. Déclencheur selon la revendication 1, caractérisé en ce que les pièces de liaison (38, 39) sont conformées en U, en ce que la forme de U est ouverte en direction de l'extérieur vu radialement à partir de la bobine (34), en ce que l'extrémité fixe du bilame thermique est fixée à l'extrémité libre de l'aile (35) entre la pièce de liaison (38) et la bobine (34), et en ce que l'extrémité libre du bilame thermique s'étend à l'intérieur de la forme de U de la pièce de liaison (39) et, par rapport à la bobine (34), à l'extérieur de la pièce de liaison (39).
  3. Déclencheur à surintensité et à court-circuit pour un disjoncteur d'installation, en particulier pour un disjoncteur de protection de ligne, comportant un déclencheur thermique conformé en bilame thermique, ainsi qu'un déclencheur électromagnétique à armature battante, avec une armature battante, une bobine, une culasse et un noyau, la culasse présentant une aile qui s'étend parallèlement à l'axe de bobine et sur laquelle le déclencheur thermique est fixé en étant parallèle à l'axe de la bobine et à l'aile de la culasse du déclencheur électromagnétique, de telle sorte qu'il soit chauffé par la bobine parcourue par le courant et par la culasse parcourue par le courant,caractérisé en ce que la culasse est conformée en U et couvre la bobine perpendiculairement à l'axe de bobine avec son âme, l'une des ailes s'étendant au-delà de la bobine (50) et du corps de bobine dans la direction axiale, en ce que ladite aile présente deux branches (55, 56) situées dans un plan, qui sont reliées entre elles par une cloison de liaison (57) au niveau de leur extrémité libre, et en ce que le bilame thermique (59) ainsi qu'une extrémité du fil de la bobine (50) sont fixés à la face de la cloison de liaison (57) tournée vers la bobine.
  4. Déclencheur selon la revendication 3, caractérisé en ce que le bilame thermique s'étend, entre les deux branches (55, 56) d'une part, et s'étend avec son extrémité fixe entre les branches (55, 56) et la bobine (50) et avec son extrémité libre à l'extérieur des branches (55, 56) et dépasse par rapport à l'âme (51) de la culasse en forme de U.
  5. Déclencheur selon une des revendications précédentes, caractérisé en ce que la longueur de l'aile correspond à la longueur du bilame, de préférence est égale ou supérieure à celle-ci.
  6. Déclencheur selon une des revendications 1 à 5, caractérisé en ce que le déclencheur thermique est connecté en parallèle avec la bobine et le cas échéant en parallèle avec la culasse.
  7. Déclencheur selon une des revendications 1 à 5, caractérisé en ce que le déclencheur thermique est connecté en série avec la bobine.
  8. Déclencheur selon une des revendications 1 à 4, caractérisé en ce que le déclencheur thermique n'est pas parcouru par le courant et est chauffé par la chaleur de la bobine.
EP97121381A 1996-12-20 1997-12-05 Déclencheur de surintensité et de courtcircuit pour un disjoncteur électrique Expired - Lifetime EP0849761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19653295A DE19653295A1 (de) 1996-12-20 1996-12-20 Überstrom- und Kurzschlußauslöser für einen elektrischen Installationsschalter
DE19653295 1996-12-20

Publications (3)

Publication Number Publication Date
EP0849761A2 EP0849761A2 (fr) 1998-06-24
EP0849761A3 EP0849761A3 (fr) 1999-01-07
EP0849761B1 true EP0849761B1 (fr) 2003-05-07

Family

ID=7815533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121381A Expired - Lifetime EP0849761B1 (fr) 1996-12-20 1997-12-05 Déclencheur de surintensité et de courtcircuit pour un disjoncteur électrique

Country Status (3)

Country Link
EP (1) EP0849761B1 (fr)
AT (1) ATE239978T1 (fr)
DE (2) DE19653295A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8754729B2 (en) 2011-07-05 2014-06-17 Siemens Aktiengesellschaft Short-circuit release having an optimized coil connection

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10329006A1 (de) * 2003-06-27 2005-01-13 Abb Patent Gmbh Elektrische Auslöseeinrichtung
DE10335704A1 (de) * 2003-08-05 2005-03-03 Abb Patent Gmbh Elektrische Auslöseeinrichtung für ein elektrisches Schaltgerät
CA2577536A1 (fr) * 2004-11-22 2006-06-01 Abb Patent Gmbh Dispositif de commutation avec deconnexion electromagnetique
DE102010040947A1 (de) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Auslöseeinrichtung für ein Schutzschaltgerät sowie Schutzschaltgerät
DE102012111618A1 (de) * 2012-11-29 2014-06-18 Eaton Industries (Austria) Gmbh Leitungsschutzschalter mit passiv beheiztem Bimetall-Element
DE102012111566A1 (de) * 2012-11-29 2014-06-05 Eaton Electrical Ip Gmbh & Co. Kg Auslösevorrichtung für Leistungsschalter
CN103441047B (zh) * 2013-09-16 2015-05-20 安德利集团有限公司 一种小型漏电断路器的脱扣触发装置
CN103681146B (zh) * 2013-12-10 2016-08-17 德力西电气有限公司 一种小型断路器
DE102014117034A1 (de) * 2014-11-20 2016-05-25 Eaton Industries (Austria) Gmbh Leitungsschutzschalter mit passiv beheiztem und auf einen Schlaganker eines elektromagnetischen Auslösers wirkendem Bimetall-Element
DE102014117035A1 (de) * 2014-11-20 2016-05-25 Eaton Industries (Austria) Gmbh Leitungsschutzschalter mit passiv beheiztem und auf einem Eisenrückschluss eines elektromagnetischen Auslösers wirkendem Bimetall-Element
CN109243936B (zh) * 2018-10-26 2024-07-12 厦门国研科技有限公司 一种多回路断路器

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DE469660C (de) * 1927-07-02 1928-12-20 Siemens Schuckertwerke Akt Ges UEberlastungsschalter
BE387103A (fr) * 1931-03-28
DE662139C (de) * 1935-11-26 1938-07-06 Elektrotechnische Spezialfabri Thermisch und magnetisch wirkender UEberstromausloeser
DE1463684B2 (de) * 1964-11-17 1970-06-18 Stotz-Kontakt GmbH, 6800 Mannheim-Käfertal Installationsselbstschalter mit thermischem und magnetischem.Auslöser
FR1544977A (fr) * 1966-11-18 1968-11-08 Licentia Gmbh Déclencheur à bilame à chauffage direct et indirect pour disjoncteur
DE2610951C3 (de) * 1976-03-16 1980-09-18 Brown, Boveri & Cie Ag, 6800 Mannheim Schutzschalter
DE3013016A1 (de) * 1980-04-03 1981-10-08 Brown, Boveri & Cie Ag, 6800 Mannheim Ausloesesystem eines selbstschalters zur unterbrechung eines stromkreises

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8754729B2 (en) 2011-07-05 2014-06-17 Siemens Aktiengesellschaft Short-circuit release having an optimized coil connection
KR20160119007A (ko) * 2011-07-05 2016-10-12 지멘스 악티엔게젤샤프트 최적의 코일 접속을 갖는 단락 회로 릴리스

Also Published As

Publication number Publication date
DE19653295A1 (de) 1998-06-25
EP0849761A3 (fr) 1999-01-07
EP0849761A2 (fr) 1998-06-24
ATE239978T1 (de) 2003-05-15
DE59710032D1 (de) 2003-06-12

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