EP1356488B1 - Dispositif d'ajustage pour declencheur thermique - Google Patents

Dispositif d'ajustage pour declencheur thermique Download PDF

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Publication number
EP1356488B1
EP1356488B1 EP02700161A EP02700161A EP1356488B1 EP 1356488 B1 EP1356488 B1 EP 1356488B1 EP 02700161 A EP02700161 A EP 02700161A EP 02700161 A EP02700161 A EP 02700161A EP 1356488 B1 EP1356488 B1 EP 1356488B1
Authority
EP
European Patent Office
Prior art keywords
bimetallic
limb
strip
adjustment apparatus
bending point
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
EP02700161A
Other languages
German (de)
English (en)
Other versions
EP1356488A1 (fr
Inventor
Christoph Weber
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1356488A1 publication Critical patent/EP1356488A1/fr
Application granted granted Critical
Publication of EP1356488B1 publication Critical patent/EP1356488B1/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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7436—Adjusting the position (or prestrain) of the bimetal

Definitions

  • the invention relates to an adjusting device for a thermal release of a switching device according to the preamble of claim 1.
  • Such adjusting device is known from EP 0 913 848 A2 known.
  • Under switching device while mechanical or electromechanical switching devices, especially circuit breakers, circuit breakers, relays, contactors or the like understood.
  • Such a switching device is used to connect a circuit to a power grid and for manual and automatic disconnection of the circuit from the network when the current exceeds a predetermined value.
  • a miniature circuit breaker protects cables in installations and systems against overload and short circuits. In a network with shutdown by overcurrent protective devices prevents such a switching device in case of failure additionally the existence of high contact voltages.
  • the switching device or circuit breaker is a power storage, eg. As a spring, as part of a mechanical switching mechanism or switching mechanism clamped, which is released during the tripping operation and actuates the switch.
  • the switching device comprises a thermal release in the form of a usually strip-shaped bimetal, which triggers delay-dependent delayed overload.
  • the tripping operation is triggered by a thermal deformation of the bimetallic strip as a result of the overcurrent carried over this.
  • the bimetallic strip acts on a release lever spaced opposite its free end and mechanically coupled to the switch lock.
  • the switching device usually also includes an instantaneous triggering magnetic or electromagnetic trigger for high surge and short circuit currents.
  • the distance between the free end of the bimetal and the release lever is adjustable, what an adjusting screw is usually provided for.
  • Switchgear in which such an adjusting screw are used for bimetallic adjustment are, for example, from DE 1 904 731 A1 and from the EP 0 143 981 A1 as well as from the EP 0 412 953 A3 known.
  • the use of an adjusting screw is associated with corresponding manufacturing and manufacturing costs.
  • the invention is therefore based on the object, a particularly inexpensive and easy to handle adjusting device for a switching device, in particular for a circuit breaker specify.
  • the distance between the trigger lever and the latter as a result of thermal deformation increasingly acting in the triggering free end of the bimetal is adjustable by bending a fixedly connected to this bimetallic.
  • the bimetal has at least one predetermined bending point, preferably two or three predetermined bending points on.
  • the bimetal is effective in its fixation or storage in the housing of such a switching device as a multi-link chain or gearbox.
  • the bimetallic support In the region of a first predetermined bending point, the bimetallic support has a holding limb extending parallel to the bimetal and connected to its contact end, and a handling leg extending at least approximately transversely thereto. The free end of the handling leg may be guided in or against a housing contour, wherein this free end is guided or held pivotably by means of a corresponding actuating tool on an at least approximately circular arc-shaped bending web.
  • Another, second predetermined bending point is provided either along the retaining leg or at its side facing away from the handle leg end.
  • the bimetal in this second predetermined bending point goes over into a holding leg expediently at an obtuse angle transverse fixing legs.
  • the fixing leg itself is then expediently itself in turn twofold, so that there is a total of approximately U-shaped fixing legs and thus a total loop-shaped or loop-shaped bimetallic.
  • the handling leg extending from the first predetermined bending point is bent inwards or outwards.
  • bent handling leg of this front side is suitably guided against an arcuate Justierkontur. This is preferably realized by a corresponding housing contour of the switching device.
  • This having the shape of an arc adjustment or housing contour has a decreasing radius, in which the handling leg is located.
  • the bimetal carrier is bent and thus changes the position of the bimetal for the purpose of Bimetalljust réelle. It can be adjusted according to the requirements by appropriate design of the adjustment or housing contour, the ratio of angle of rotation of the handling leg and movement of Bimetall990des.
  • the adjusting device is in turn bent by twisting the handling leg to the pivot points formed by the two predetermined bending points of the bimetal and thus changed the position of the bimetal for the purpose of adjustment.
  • the distance of the free end of the bimetallic strip or the bimetal tip to the release lever is thus adjusted or adjusted by bending the bimetallic support.
  • the predetermined bending points are expediently formed by material recesses in the corresponding crimping crests of the bimetal carrier.
  • These Nachschwindonne which are commonly used housing materials, lead over the device life to undesirable changes important, constructive dimensional assignments, in particular the distance between the bimetal and trip lever, and thus to an undesirable misalignment or adjustment of the thermal release.
  • FIGS 1 and 3 show a detail of a switching device 1 with the housing cover lifted off the housing 2, in which the essential parts of an adjustable thermal release are shown visibly.
  • the thermal release comprises a bimetallic strip 3, whose contact end 3a is integrally connected to a bimetallic support 4 and thus held stationary.
  • the bimetal 4 is electrically connected to a terminal 5 for power management via the switching device 1.
  • the free end 3b of the bimetal 3, d. H. the bimetal, is a trigger lever 6 spaced opposite, which is coupled to a non-illustrated rear derailleur or switch lock in a conventional manner.
  • This distance A between the bimetallic tip 3b and the release lever 6 is adjustable by bending the bimetal 4.
  • the bimetal 4 is repeatedly bent or bent in the manner of a three-link chain.
  • the contact end 3a of the bimetal 3 is firmly bonded.
  • the holding leg 4b is in this embodiment at a second predetermined bending point 8 in a Fixierschenkel 4c, which is itself bent approximately U-shaped.
  • the bimetallic support 4 is fixed in position in the housing 2 by means of corresponding housing structures or contours 9, 10.
  • the outwardly directed handling leg 4a of the bimetallic support 4 is guided frontally against an arcuate housing contour and is supported there.
  • This housing contour forms the arcuate Justierkontur 12 for Bimetalljust réelle.
  • the radius R of this circular or arcuate Justierbahn B predetermining Justierkontur 12 decreases in a clockwise direction to a reduced radius R 'down.
  • the second predetermined bending point 8 is provided approximately in the middle region of the retaining limb 4b of the bimetallic support 4. Up to this predetermined bending point 8 is then the bimetal 4 with its fixing legs 4c between the correspondingly executed housing structures or contours force-locking clamped. Thus, only one leg portion of the retaining leg 4b and in its extension over the first predetermined bending point 7 of the handling leg 4'a in the direction of the double arrow 11 are bendable.
  • the fixing leg 4c of the bimetallic support 4, which adjoins the retaining limb 4b in this embodiment via a bend 8 ', is in turn bent at least approximately in a U-shape.
  • the handling leg 4'a is bent inwards and thereby even bent to form a third predetermined bending point 13, so that the bimetallic support 4 is effective in the manner of a four-bar chain.
  • the first and second predetermined bending point 7 and 8 are formed in both embodiments according to Figures 2 and 4 by drilling or punching in the sheet material of the bimetal 4.
  • the third predetermined bending point 13 is also made by a corresponding material recess.
  • Freiendlor is on the handling leg 4'a a rotary or positioning pin 14 formed, which is formed by a material recess in the sheet metal flap-like handling leg 4'a.
  • This pivot pin 14 of the handling leg 4'a engages in a housing effective as a rotational contour housing or rotary opening 15 which is provided in a suitably positioned housing contour in the form of expediently a dome-shaped housing structure 16.
  • free end 4 "a of the handling leg 4 ⁇ a attacks the actuating tool for bimetallic adjustment.
  • the bimetallic support 4 is in turn bent by turning the handling leg 4 ' a in the direction of the double arrow B shown, and the position of the bimetal 3 is changed to set the distance A.
  • the bimetallic tip or the free end 3b of the bimetal 3 is rotated in the triggering direction D, thereby performing the bimetallic adjustment.
  • the rotary joint formed by the pivot pin 14 and the rotary opening 15 again predetermines the circular or circular-shaped adjusting track B symbolized by the double arrow.
  • the adjusting device is essentially formed by the bimetallic support 4 with the bimetal 3 held thereon and the rotary opening 15 in the housing attachment 16 which acts as an adjustment contour.
  • the bimetal adjustment serving and provided by the along the bimetallic support 4 provided predetermined bending points 7 and 8 or 7,8 and 13 in the manner of a multi-link chain effective mechanism advantageously also a practically unavoidable GeHousachachschwindung.
  • This Nachschwindung also causes an approximation of effective as Justierkontur housing contour 12 and the Gescouseaufficientes 16 - and thus effective as Justierkontur rotational opening 15 - in the direction
  • the distance or the dimension A increases due to a housing shrinkage.
  • the contour 12 moves toward the contour 9 and the bimetallic strip 3 or its tip 3b is tracked in the clockwise direction.
  • the distance or the dimension A decreases as a result of a housing shrinkage, with the contour 16 moving towards the fastening contour 9. This reduces the distance between the two predetermined bending points 8 and 13, with the result that the predetermined bending point 7 is pressed against the release direction D and the bimetal 3 is moved counterclockwise.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Vending Machines For Individual Products (AREA)
  • Finger-Pressure Massage (AREA)

Claims (9)

  1. Dispositif d'ajustage pour un déclencheur thermique d'un appareil de commutation (1), comprenant un bilame (3) maintenu de façon fixe sur un support de bilame (4), dont l'extrémité libre (3b) est espacée d'un levier de déclenchement (6) et sollicite celui-ci à la suite d'une déformation thermique de façon croissante dans le sens de déclenchement (D), la distance (A) étant réglable par la torsion du support de bilame (4), le support de bilame (4) présentant dans la zone d'un (premier) point de flexion théorique (7) une branche de retenue (4b) agencée parallèlement au bilame (3) et reliée à son extrémité de contact (3a) ainsi qu'une branche de manipulation (4a) agencée approximativement transversalement à la branche de retenue, caractérisé en ce que l'extrémité libre de la branche de manipulation (4a) est guidée dans un contour de boîtier ou contre un contour de boîtier (12 resp. 15, 16) et peut basculer sur une trajectoire de réglage (B) de forme au moins approximativement circulaire.
  2. Dispositif d'ajustage selon la revendication 1, caractérisé en ce que le support de bilame (4) présente le long de sa branche de retenue (4b) un second point de flexion théorique (8) espacé du premier point de flexion théorique (7).
  3. Dispositif d'ajustage selon la revendication 1 ou 2, caractérisé en ce que le support de bilame (4) présente une branche de fixation (4c) se raccordant par une partie coudée (8, 8') à la branche de retenue (4b) et de forme au moins approximativement en U.
  4. Dispositif d'ajustage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la branche de manipulation (4a) du support de bilame (4) est guidée côté avant contre un contour de réglage (2) en forme d'arc.
  5. Dispositif d'ajustage selon la revendication 4, caractérisé en ce que le contour de réglage (12) forme une trajectoire de réglage (B) au moins approximativement en forme d'arc de cercle avec un rayon (R, R') décroissant.
  6. Dispositif d'ajustage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la branche de manipulation (4'a) du support de bilame (4) présente un pivot rotatif (14) agencé transversalement à la direction longitudinale de la branche et pouvant être fixé en position dans une ouverture de rotation (15) fixe, un autre (troisième) point de flexion théorique (13) étant prévu entre le pivot et le premier point de flexion théorique (7).
  7. Dispositif d'ajustage selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le point de flexion théorique ou tout point de flexion théorique (7, 8, 13) est formé par un évidement de matériau dans le sommet de coude concerné du support de bilame (4).
  8. Appareil de commutation, en particulier disjoncteur de protection de circuit, avec un dispositif de réglage (4, 12 resp. 15) selon l'une quelconque des revendications 1 à 7.
  9. Appareil de commutation selon la revendication 8, dans lequel le dispositif de réglage (4, 12 resp. 15) compense un retrait de boîtier de telle sorte que, dans le cas d'un espacement (A) variable entre le levier de déclenchement (6) et l'extrémité libre (3b) du bilame (3), celle-ci se déplace automatiquement de façon appropriée dans resp. contre le sens des aiguilles d'une montre.
EP02700161A 2001-01-31 2002-01-18 Dispositif d'ajustage pour declencheur thermique Expired - Lifetime EP1356488B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10104272 2001-01-31
DE10104272 2001-01-31
PCT/DE2002/000155 WO2002061785A1 (fr) 2001-01-31 2002-01-18 Dispositif d'ajustage pour declencheur thermique

Publications (2)

Publication Number Publication Date
EP1356488A1 EP1356488A1 (fr) 2003-10-29
EP1356488B1 true EP1356488B1 (fr) 2007-08-01

Family

ID=7672314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02700161A Expired - Lifetime EP1356488B1 (fr) 2001-01-31 2002-01-18 Dispositif d'ajustage pour declencheur thermique

Country Status (7)

Country Link
US (1) US6816055B2 (fr)
EP (1) EP1356488B1 (fr)
CN (1) CN1224072C (fr)
AT (1) ATE368935T1 (fr)
DE (1) DE50210588D1 (fr)
ES (1) ES2289074T3 (fr)
WO (1) WO2002061785A1 (fr)

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JP2002174868A (ja) * 2000-12-07 2002-06-21 Fuji Photo Film Co Ltd 放射線画像情報読取装置
DE50206909D1 (de) * 2001-07-02 2006-06-29 Siemens Ag Justiervorrichtung fuer einen thermischen ausloeser
JP2005222738A (ja) * 2004-02-03 2005-08-18 Fuji Electric Fa Components & Systems Co Ltd 回路遮断器の過負荷・欠相引外し装置
US7498913B2 (en) * 2004-04-21 2009-03-03 Mitsubishi Electric Corporation Thermal trip device and circuit breaker using the same
US7397339B2 (en) * 2005-10-14 2008-07-08 Sensata Technologies, Inc. Method for ambient temperature compensating thermostat metal actuated electrical devices having a plurality of current ratings
DE102006027812A1 (de) * 2006-06-16 2007-12-20 Siemens Ag Leitungsschutzschalter und Magnetjoch für einen Leitungsschutzschalter
US7518482B2 (en) * 2006-10-10 2009-04-14 Dennis William Fleege Trip unit having a plurality of stacked bimetal elements
KR100881365B1 (ko) * 2007-08-07 2009-02-02 엘에스산전 주식회사 열동형 과부하 보호장치의 트립 감도 조정 방법
KR100905021B1 (ko) * 2007-08-07 2009-06-30 엘에스산전 주식회사 열동형 과부하 트립 장치 및 그의 트립 감도 조정 방법
US8386585B2 (en) * 2008-04-25 2013-02-26 Tajitshu Transfer Limited Liability Company Real-time communications over data forwarding framework
JP4706772B2 (ja) * 2009-03-27 2011-06-22 富士電機機器制御株式会社 熱動形過負荷継電器
JP4906881B2 (ja) * 2009-03-27 2012-03-28 富士電機機器制御株式会社 熱動形過負荷継電器
CN205789807U (zh) * 2016-06-27 2016-12-07 施耐德电器工业公司 一种热脱扣补偿结构
GB2591796A (en) * 2020-02-07 2021-08-11 Eaton Intelligent Power Ltd Circuit breaker and method for operating a circuit breaker
DE102020216415B4 (de) * 2020-12-21 2023-03-02 Siemens Aktiengesellschaft Elektrischer Schalter mit einer thermischen Auslöseeinheit und Verfahren zur Adaption einer thermischen Auslösekurve

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Also Published As

Publication number Publication date
ATE368935T1 (de) 2007-08-15
DE50210588D1 (de) 2007-09-13
CN1488157A (zh) 2004-04-07
CN1224072C (zh) 2005-10-19
US6816055B2 (en) 2004-11-09
WO2002061785A1 (fr) 2002-08-08
ES2289074T3 (es) 2008-02-01
EP1356488A1 (fr) 2003-10-29
US20040100350A1 (en) 2004-05-27

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