EP0821383A2 - 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
EP0821383A2
EP0821383A2 EP97112479A EP97112479A EP0821383A2 EP 0821383 A2 EP0821383 A2 EP 0821383A2 EP 97112479 A EP97112479 A EP 97112479A EP 97112479 A EP97112479 A EP 97112479A EP 0821383 A2 EP0821383 A2 EP 0821383A2
Authority
EP
European Patent Office
Prior art keywords
yoke
yoke leg
coil axis
bimetal
leg
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
EP97112479A
Other languages
German (de)
English (en)
Other versions
EP0821383A3 (fr
EP0821383B1 (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
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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Definitions

  • the invention relates to an overcurrent release for an electrical installation device, in particular for a circuit breaker with a bimetal thermal trigger.
  • Miniature circuit breaker for protection against thermal overload and also against short circuit are basically the same. You are using a magnetic trigger for the Short circuit protection and a thermal release in the form of a bimetallic metal against Equipped with overload.
  • the thermal bimetals for such overcurrent releases are designed as bimetal strips, which are clamped on one side and are heated by current flow. It can the current flows through the bimetallic strip; he can carry a heating coil or heated by the coil of the magnetic trigger. Usually the bimetals are designed so that they increase when the current flow increases bend 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 bimetallic snap elements are in DE 38 00 582 C2 or DE 42 240 46 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.
  • This object is achieved in that the bimetal that is heated additionally performs a snap movement, is clamped on one side, so that its free end after the snap movement is carried out with further heating is further bendable.
  • This bimetal is clamped with its one, fixed end and when it is through Current increase or temperature increase is heated, snaps when the Snap the bimetal into a second layer and with further heating there is a further continuous bending of the other end.
  • the bimetal on the yoke leg is an electromagnetic one Triggers attached and runs parallel to this yoke leg and parallel to the coil axis so that it is due to 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.
  • a trigger which is designated in its entirety with the reference number 10, has an electromagnetic trigger 11 and a thermal trigger 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, the one armature and surrounds a core (both not shown). Wrapped around the bobbin 15 is 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 further components.
  • the yoke 13 has a second one Leg 18, which is perpendicular to 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 Two further advantageous embodiments of the invention are shown in FIGS. 2 and 3.
  • the bimetallic metal 12 is attached at the break point of the L-shaped yoke. It runs outside the yoke leg 14 and perpendicular to the coil axis parallel to this, the bridge 22 being formed on the outside of the yoke leg 14 is. Since the other features are the same as the embodiment according to FIG. 1, the same reference numerals have been used as in Fig. 1.
  • FIG. 3 shows a further embodiment of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
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
DE19629960 1996-07-25
DE19629960A DE19629960A1 (de) 1996-07-25 1996-07-25 Überstromauslöser für ein elektrisches Installationsgerät, insbesondere für einen Leitungsschutzschalter

Publications (3)

Publication Number Publication Date
EP0821383A2 true EP0821383A2 (fr) 1998-01-28
EP0821383A3 EP0821383A3 (fr) 1999-01-07
EP0821383B1 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732488A (fr) * 1931-03-04 1932-09-21 Brown Dispositif thermique de déclenchement à action différée comportant un élément bimétallique à branches multiples
US3265839A (en) * 1963-08-05 1966-08-09 Fasco Industries Thermally-operable circuit breaker
US4165502A (en) * 1977-06-08 1979-08-21 Square D Company Current limiter assembly for a circuit breaker
EP0037490A1 (fr) * 1980-04-03 1981-10-14 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Dispositif de déclenchement d'un interrupteur automatique pour interrompre un circuit
EP0143022A1 (fr) * 1983-10-21 1985-05-29 Merlin Gerin Déclencheur magnétothermique de disjoncteur

Family Cites Families (6)

* 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
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732488A (fr) * 1931-03-04 1932-09-21 Brown Dispositif thermique de déclenchement à action différée comportant un élément bimétallique à branches multiples
US3265839A (en) * 1963-08-05 1966-08-09 Fasco Industries Thermally-operable circuit breaker
US4165502A (en) * 1977-06-08 1979-08-21 Square D Company Current limiter assembly for a circuit breaker
EP0037490A1 (fr) * 1980-04-03 1981-10-14 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Dispositif de déclenchement d'un interrupteur automatique pour interrompre un circuit
EP0143022A1 (fr) * 1983-10-21 1985-05-29 Merlin Gerin Déclencheur magnétothermique de disjoncteur

Also Published As

Publication number Publication date
EP0821383A3 (fr) 1999-01-07
DE59710197D1 (de) 2003-07-10
EP0821383B1 (fr) 2003-06-04
DE19629960A1 (de) 1998-01-29
ATE242544T1 (de) 2003-06-15

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