EP0821383B1 - Déclencheur de surintensité pour un appareil électrique, en particulier pour un disjoncteur de protection - Google Patents

Déclencheur de surintensité pour un appareil électrique, en particulier pour un disjoncteur de protection Download PDF

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Publication number
EP0821383B1
EP0821383B1 EP97112479A EP97112479A EP0821383B1 EP 0821383 B1 EP0821383 B1 EP 0821383B1 EP 97112479 A EP97112479 A EP 97112479A EP 97112479 A EP97112479 A EP 97112479A EP 0821383 B1 EP0821383 B1 EP 0821383B1
Authority
EP
European Patent Office
Prior art keywords
bimetal
leg
coil
snap
trip
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
EP97112479A
Other languages
German (de)
English (en)
Other versions
EP0821383A3 (fr
EP0821383A2 (fr
Inventor
Gerhard Mössner
Heinz-Erich Dr. Popa
Joachim Becker
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 EP0821383A2 publication Critical patent/EP0821383A2/fr
Publication of EP0821383A3 publication Critical patent/EP0821383A3/fr
Application granted granted Critical
Publication of EP0821383B1 publication Critical patent/EP0821383B1/fr
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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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Definitions

  • the invention relates to an overcurrent release for an electrical installation device, according to the preamble of claim 1.
  • Miniature circuit breaker for protection against thermal overload and also against short circuit are basically the same. They are with a magnetic trigger for the Short circuit protection and a thermal trigger in the form of a bimetallic metal against Overload equipped.
  • the thermal bimetals for such overcurrent releases are designed as bimetallic strips, which are clamped on one side and are heated by current flow: the current flows through the bimetallic strip; he can carry a heating coil or heated by the coil of the magnetic release.
  • the bimetals are designed so that they increase with the current flow turn out all the more.
  • the thermal trigger is a bimetallic snap disk realized, which is heated by the coil of the magnetic release, see DE-PS 36 37 275.
  • Similar bimetal snap elements are in DE 38 00 582 C2 or DE 42 24 046 A1.
  • the power loss is of the switch higher.
  • the problem with the snap disk arrangement is that the total stroke of the snap element is relatively small, for example 0.8 mm; therefore must be manufactured with low tolerances, which is a high manufacturing technology Brings effort. If you provide two snap disks, then you get a higher number of parts.
  • the object of the invention is to provide a thermal release in which a greater path reserve is achieved when triggered.
  • bimetallic strips which can perform a snap movement, are also in the Manual of the company Rau, Pforzheim, "Thermobimetal basics, calculation, design, Selection ", 1989, pages 118 to 123.
  • this bimetal with its one fixed end, is at the free end attached to the yoke leg of the electromagnetic release, so that it through the Temperature increase of the coil is heated.
  • the bimetal is in the idle state via a electrically conductive bridge in the area between the ends with the yoke leg mechanically connected, so that the current at least in the beginning also over a partial area of the bimetal flows so that a partial flow until the element snaps flows through the bimetal so that the bimetal is heated more quickly.
  • the bridge is through a pin on the yoke leg and / or formed on the bimetal.
  • this snap-action bimetal has a defined response value is available when the snap temperature is reached. There the bimetal has another continuous bend after snapping executes, the path reserve is also increased. In addition, you get a higher one Release force than with a conventional bimetal, which has no snap function having; the direct heating or indirect heating is then also through the Stop, d. H. adjustable through the bridge.
  • a trigger which is designated in its entirety with the reference number 10, has an electromagnetic release 11 and a thermal release 12.
  • the electromagnetic Trigger has an L-shaped yoke 13, with a first leg 14, on which a bobbin 15 is placed perpendicular to it, which is a magnet armature and surrounds a core (both not shown).
  • Around the bobbin 15 is wound around a coil 16, one end of which is connected to the leg 14.
  • the other end 17 of the coil 16 goes inside the installation device in which the Trigger is used to continue to other components.
  • the yoke 13 has one second leg 18, which is perpendicular to the leg 14 and parallel to the Coil axis or to the axis of the bobbin 15.
  • the leg 18 is approximately like this long as the bobbin 15.
  • the thermal bimetal 12 is one with a snap function; 4 shows the path-temperature diagram with a curve shape 23 of the free end 24 of the thermobimetal 12.
  • the free end 24 moves slightly according to a first section 25; as soon as the snap temperature T s is reached, the bimetal 12 snaps over, so that the distance covered by the free end 24 suddenly increases; and after snapping the thermobimetal bends further according to the curve region 27, so that an additional path ⁇ s can be reached after the snapping.
  • the curve area which indicates the snap movement has the reference number 26.
  • FIGS. 2 and 3 show embodiments which are not Embodiments of the invention, but are examples that the Facilitate understanding of the invention.
  • the bimetal 12 is in Fastening point of the L-shaped yoke attached. It runs outside of the perpendicular to the Coil axis extending yoke leg 14 and parallel to it, being at the
  • the bridge 22 is integrally formed on the outside of the yoke leg 14. Because the rest Features per se of the embodiment according to FIG. 1 are also the same Reference numerals as in Fig. 1 have been used.
  • thermobimetal 12 is at the free end of the Fixed yoke leg 18 parallel to the coil axis; it jumps from that Yoke leg 18 in the same direction as the yoke leg 14, so that the Thermobimetal 12 forms a U-shape together with the yoke 13 in which the coil 16 is arranged.

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

Claims (4)

  1. Déclencheur à surintensité pour appareil d'installation électrique, en particulier pour un disjoncteur de protection de ligne, avec un déclencheur thermique comportant un bilame et avec un déclencheur électromagnétique comportant une bobine et une culasse, qui présente une première aile parallèle à la bobine dans l'espace et couvrant celle-ci, et une seconde aile disposée transversalement à la première, caractérisé en ce que le bilame (12), qui est conformé de telle sorte qu'en s'échauffant il ait un mouvement de déclic supplémentaire, est lié par une extrémité (19) à l'extrémité libre de l'aile de culasse (18) du déclencheur électromagnétique, parallèle à l'axe de la bobine et couvrant celle-ci, de sorte que son extrémité libre (24), après le mouvement de déclic, peut continuer à se déformer avec la poursuite de l'échauffement.
  2. Déclencheur à surintensité selon la revendication 1, comportant un déclencheur électromagnétique à courant de court-circuit, caractérisé en ce que le bilame (12) est fixé à l'aile de culasse (18) du déclencheur électromagnétique (11).
  3. Déclencheur à surintensité selon une des revendications précédentes, caractérisé en ce que le bilame (12), au repos, est relié mécaniquement à l'aile de culasse (18) par un pont (22) électro-conducteur dans la zone entre les extrémités, de telle sorte que le courant, au moins au début jusqu'au déclenchement par déclic du bilame, traverse au moins partiellement le bilame (12), afin que celui-ci chauffe plus rapidement.
  4. Déclencheur à surintensité selon la revendication 3, caractérisé en ce que le pont (22) est formé par un plot sur l'aile de culasse (18) et/ou sur le bilame (12).
EP97112479A 1996-07-25 1997-07-19 Déclencheur de surintensité pour un appareil électrique, en particulier pour un disjoncteur de protection Expired - Lifetime EP0821383B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629960A DE19629960A1 (de) 1996-07-25 1996-07-25 Überstromauslöser für ein elektrisches Installationsgerät, insbesondere für einen Leitungsschutzschalter
DE19629960 1996-07-25

Publications (3)

Publication Number Publication Date
EP0821383A2 EP0821383A2 (fr) 1998-01-28
EP0821383A3 EP0821383A3 (fr) 1999-01-07
EP0821383B1 true EP0821383B1 (fr) 2003-06-04

Family

ID=7800758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97112479A Expired - Lifetime EP0821383B1 (fr) 1996-07-25 1997-07-19 Déclencheur de surintensité pour un appareil électrique, en particulier pour un disjoncteur de protection

Country Status (3)

Country Link
EP (1) EP0821383B1 (fr)
AT (1) ATE242544T1 (fr)
DE (2) DE19629960A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012200728A1 (de) * 2012-01-19 2013-07-25 Siemens Aktiengesellschaft Elektrischer Schalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265839A (en) * 1963-08-05 1966-08-09 Fasco Industries Thermally-operable circuit breaker
EP0143022A1 (fr) * 1983-10-21 1985-05-29 Merlin Gerin Déclencheur magnétothermique de disjoncteur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE496968C (de) * 1930-04-30 Aeg UEberstromschalter mit elektromagnetischer und thermischer Ausloesung
FR732488A (fr) * 1931-03-04 1932-09-21 Brown Dispositif thermique de déclenchement à action différée comportant un élément bimétallique à branches multiples
FR1022813A (fr) * 1950-03-01 1953-03-10 Conjoncteur-disjoncteur à rupture brusque et retardée, actionné par un bilame
DE1036992B (de) * 1956-08-16 1958-08-21 Wickmann Werke Ag UEberstromschalter
DE1763575A1 (de) * 1968-06-26 1971-11-25 Franz Jungels Thermisch betaetigbarer UEberstromschalter
DE6913744U (de) * 1969-04-05 1969-07-24 Bbc Brown Boveri & Cie Magnetischer ausloeser fuer installationsselbstschalter
DE2138438C3 (de) * 1971-07-31 1975-09-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Magnetische Auslösespule für Leitungsschutzschalter mit U-förmigem Eisenrückschluß
US4165502A (en) * 1977-06-08 1979-08-21 Square D Company Current limiter assembly for a circuit breaker
DE3013016A1 (de) * 1980-04-03 1981-10-08 Brown, Boveri & Cie Ag, 6800 Mannheim Ausloesesystem eines selbstschalters zur unterbrechung eines stromkreises

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265839A (en) * 1963-08-05 1966-08-09 Fasco Industries Thermally-operable circuit breaker
EP0143022A1 (fr) * 1983-10-21 1985-05-29 Merlin Gerin Déclencheur magnétothermique de disjoncteur

Also Published As

Publication number Publication date
DE59710197D1 (de) 2003-07-10
ATE242544T1 (de) 2003-06-15
DE19629960A1 (de) 1998-01-29
EP0821383A3 (fr) 1999-01-07
EP0821383A2 (fr) 1998-01-28

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