EP0760524B1 - Vorrichtung zum Einstellen eines thermischen Auslösers eines Schutzschalters - Google Patents

Vorrichtung zum Einstellen eines thermischen Auslösers eines Schutzschalters Download PDF

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Publication number
EP0760524B1
EP0760524B1 EP96410070A EP96410070A EP0760524B1 EP 0760524 B1 EP0760524 B1 EP 0760524B1 EP 96410070 A EP96410070 A EP 96410070A EP 96410070 A EP96410070 A EP 96410070A EP 0760524 B1 EP0760524 B1 EP 0760524B1
Authority
EP
European Patent Office
Prior art keywords
support
circuit breaker
foot
bimetal strip
adjusting screw
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
EP96410070A
Other languages
English (en)
French (fr)
Other versions
EP0760524A1 (de
Inventor
Javier Schneider Electric Herreros
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0760524A1 publication Critical patent/EP0760524A1/de
Application granted granted Critical
Publication of EP0760524B1 publication Critical patent/EP0760524B1/de
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

  • adjustment devices of this type include a screw adjustment acting directly on the foot of the bimetallic strip by deforming the latter so as to adjust the position of a thermal drawer associated with the bimetallic strip and having the function ensure the opening of a mobile contact in the event of overheating. This setting is made at the factory and allows you to define the tripping threshold of the circuit breaker.
  • Document DE 3517039 describes a device for adjusting a thermal trip device bimetallic strip, comprising an elastic bimetallic support in the shape of an S. One of the ends of the support is fixed to the bimetallic foot, and the other flat end is superimposed and secured to a first flat branch of a fixed L-shaped bracket.
  • the adjusting screw crosses the second branch of the stirrup acting on the foot, while the intermediate part of the support is supported on the second branch of the stirrup while being stressed elastically in the direction of release.
  • the assembly bimetallic strip and support pivots around the intermediate fulcrum, and provides a large travel movement of the bimetallic strip.
  • the bimetal support is raised by leaving the intermediate support point, and the assembly rocks around the first flat branch of the fixed stirrup, with the formation of a stroke limited travel for fine adjustment of the bimetallic strip.
  • the document EP 338 868 relates to a circuit breaker having a bimetallic strip carried by a metal plate cut and folded to form the bow horn, the support of the bimetallic strip, and supplying current to a contact range of a terminal.
  • a deformation zone elastic is provided in the intermediate part of the plate. So the deformations undergone by the terminal when tightening the screw, do not transmit to the support lug of the bimetallic strip.
  • the present invention proposes to overcome the drawbacks of constructions known by making an adjustment device as defined above, which allows a efficient factory setting of the circuit breaker and a more compact construction of all.
  • this device is mounted on the same side by relative to the central axis of the circuit breaker, asymmetrically with respect to this axis.
  • the circuit breaker 10 shown partially has a housing 11 in which are mounted the essential components well known per se.
  • a thermal drawer 12 which drives a release lever in the event of overheating, this trigger lever (not shown) having the function ensuring the unlocking of a link retaining a plate linked to a movable contact, that is to say to break the mechanical connection between this link and this plate.
  • the plate being constrained by a spring, the rupture of the mechanical connection between the link and the plate causes the opening of the contact mobile.
  • the thermal drawer 12 is linked to a thermal trip device or bimetallic strip 13 on which it is mounted via a molded shoe which fits on one end of the bimetallic strip when applying slight pressure.
  • the other classic components that appear in the drawing are a braid 15 linked to the bimetallic strip 13 and carried by a braid support 16, a bow horn 17 and a shunt 18 linked to a contact pad 19 as well as a device 20 for adjusting the thermal release.
  • the end of the bimetallic strip 13 which is opposite to the end linked to the thermal drawer 12, that is to say the foot of the bimetallic strip, is integral of an elastic or rigid support 21 in the form of a rod whose free end is articulated on a fixed pivot 22.
  • this pivot 22 is constituted by a protrusion of appropriate shape, molded or attached and secured to the housing, and the free end which is articulated on this pivot has the form of a fork 23 with two branches engaged on both sides on this protuberance.
  • An adjustment screw 24 is housed in an appropriate cavity of the case, accessible from the outside, and takes support against the base of the elastic or rigid support 21, in the connection zone of this report and bimetallic strip 13.
  • the adjustment of the bimetallic strip is carried out in the factory and defines the triggering threshold of the breaker.
  • the support 21 When the support 21 is elastic, it constitutes in itself a means of sufficient reminder to request the bimetallic strip towards an initial position corresponding to the loose state of the adjusting screw 24.
  • a spring as shown in Figure 7, must be associated with it to assume the previously mentioned function.
  • FIGS 2 and 3 are views identical to that of Figure 1, but where there is also shown a fixed cage input terminal 25 linked to the contact pad 19.
  • the adjusting screw 24 is unscrewed.
  • FIG. 3 the adjusting screw 24 has been screwed, which has caused its movement in the direction of arrow A. This screwing results in a displacement of the thermal slide 12 in the direction of the arrow B, due to the pivoting of the support 21 in the direction of arrow C around the pivot 22.
  • Figures 4 and 5 illustrate another embodiment in which the terminal to fixed cage is replaced by a mobile cage terminal 30 having a range upper 31 associated with the bow horn 17, a lower range 32 associated with the shunt 18 and a cable clamping screw 33.
  • the upper steel shelf supports the efforts related to the connection and the lower copper shelf ensures continuity direct electric with bimetallic strip 13.
  • the device for adjusting the thermal release is identical to that described previously. It comprises the bimetallic strip 13, the support 21 pivoting around a pivot fixed 22 and the adjusting screw 24.
  • Figure 4 shows the screw in the unscrewed state and
  • Figure 5 shows the screw in the screwed state. We see in the two figures the difference of position of the thermal drawer.
  • Figure 6 shows a sectional view of the circuit breaker of Figures 2 and 3 along an axis MM 1 of these figures.
  • the median axis X of the circuit breaker 10 passes through the axis of the terminal 25 with a fixed cage.
  • the bimetallic strip 13, of relatively wide construction requires an off-center construction of certain components.
  • the H-shaped cylinder head 40 commonly called magnetic H, is asymmetrical.
  • the movable contact 41 housed in the opening of the magnetic H is off-center, as is the cut-out cassette 42 in which the movable contact is located.
  • This particular construction makes it possible to integrate all the components in a housing of relatively small size.
  • the trigger adjustment device is mounted asymmetrically inside the case of the circuit breaker, on the same side with respect to its median axis.
  • FIG. 7 is a schematic view illustrating the circuit breaker 10 under a particular embodiment.
  • the support 21 is rigid and has a first end 51 wound in an arc or in a complete circle, and a second end folded square.
  • the first end wound in an arc circle is engaged in a circular cavity 53 partially open on a sector so that the support can pivot in this cavity around a virtual pivot defined by the center of said circular cavity.
  • the second end ensures fixing of the bimetallic strip.
  • a return spring 54 is fixed on the one hand to the support 21 and on the other hand to a fixed stud 55 secured to the housing.
  • the adjusting screw 24 is supported against the support 21 and is housed in a hole 56 of hexagonal section housed in the housing.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Claims (7)

  1. Vorrichtung zur Justierung des thermischen Bimetall-Auslösers eines Leistungsschalters mit
    einer von außen zugänglichen Justierschraube (24), die dazu dient, auf die Lage des Fußpunkts des Auslösers einzuwirken,
    einem Halter (21), der über eines seiner Enden mit dem Fußpunkt des Bimetallstreifens (13) verbunden ist und mit der Justierschraube (24) zusammenwirkt, die sich am unteren Ende des Halters (21) im Verbindungsbereich zwischen dem Halter (21) und dem Fußpunkt des Bimetallstreifens (13) abstützt,
    sowie Rückstellmitteln zur Rückführung des Bimetallstreifens (13) in eine Anfangsstellung entsprechend der herausgedrehten Stellung der Justierschraube (24),
    dadurch gekennzeichnet, daß
    das andere Ende des Halters (21) auf einer fest mit dem Gehäuse des Leistungsschalters verbundenen, ortsfesten Drehachse (22) gelagert ist,
    und der Fußpunkt des Bimetallstreifens (13) zur Gewährleistung des Stromflusses über einen Nebenschlußkreis (18) mit einem Kontaktstück (19) verbunden ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Halter (21) starr ausgeführt ist und die Rückstellmittel eine Rückstellfeder (54) umfassen, deren eines Ende am Halter befestigt und deren anderes Ende mit einem, fest mit dem Gehäuse des Leistungsschalters verbundenen, ortsfesten Zapfen verbunden ist.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Halter (21) biegsam ausgeführt ist und die Rückstellmittel durch den Halter selbst gebildet werden.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das an der genannten ortsfesten Drehachse (22) angelenkte Ende des Halters (21) in Form einer Gabel ausgebildet ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die genannte ortsfeste Drehachse (22) als angeformter oder eingebauter Zapfen ausgebildet ist, der fest mit dem Gehäuse des Leistungsschalters verbunden ist.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die genannte ortsfeste Drehachse durch ein Ende des Halters (21) gebildet wird, das zu einem Kreisbogen geformt und in eine, in einem Teilabschnitt geöffnete kreisrunde Aufnahme (53) eingesetzt ist.
  7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie in bezug zur Mittelachse des Leistungsschalters, in asymmetrischer Lage zu dieser Achse auf einer Seite angeordnet ist.
EP96410070A 1995-06-19 1996-06-10 Vorrichtung zum Einstellen eines thermischen Auslösers eines Schutzschalters Expired - Lifetime EP0760524B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9507459 1995-06-19
FR9507459A FR2735614B1 (fr) 1995-06-19 1995-06-19 Dispositif de reglage du declencheur thermique d'un disjoncteur

Publications (2)

Publication Number Publication Date
EP0760524A1 EP0760524A1 (de) 1997-03-05
EP0760524B1 true EP0760524B1 (de) 2002-01-30

Family

ID=9480250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96410070A Expired - Lifetime EP0760524B1 (de) 1995-06-19 1996-06-10 Vorrichtung zum Einstellen eines thermischen Auslösers eines Schutzschalters

Country Status (8)

Country Link
EP (1) EP0760524B1 (de)
CN (1) CN1066846C (de)
DE (1) DE69618873D1 (de)
FR (1) FR2735614B1 (de)
HU (1) HUP9601552A3 (de)
TN (1) TNSN96086A1 (de)
TR (1) TR199600518A2 (de)
TW (1) TW371771B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643530B1 (de) * 2004-10-01 2007-07-11 Hager Electro S.A. Regulierbarer Antrieb für eine Stromleitung-Schutz-Vorrichtung
CZ300253B6 (cs) * 2005-08-15 2009-04-01 Oez S. R. O. Serizovací ústrojí, zvlášte pro tepelnou spoušt elektrického spínacího prístroje
KR101678862B1 (ko) * 2010-08-23 2016-11-23 엘에스산전 주식회사 배선용차단기의 과전류 트립 감도 조정장치
CN103065889B (zh) * 2012-12-21 2015-10-07 德力西电气有限公司 一种热双金属片过载脱扣机构
CN104064415B (zh) * 2014-06-30 2016-10-05 温州罗格朗电器有限公司 一种整体式漏电断路器
JP6986300B2 (ja) * 2018-09-20 2021-12-22 株式会社生方製作所 直流遮断器
DE102020216415B4 (de) * 2020-12-21 2023-03-02 Siemens Aktiengesellschaft Elektrischer Schalter mit einer thermischen Auslöseeinheit und Verfahren zur Adaption einer thermischen Auslösekurve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897319A (en) * 1958-06-26 1959-07-28 Gen Electric Electric switch
CH530089A (de) * 1970-11-12 1972-10-31 Siemens Ag Schutzschalter
DE3517039A1 (de) * 1985-05-11 1986-11-13 Lindner Gmbh, Fabrik Elektrischer Lampen Und Apparate, 8600 Bamberg Justierbare bimetall-ausloesevorrichtung
FR2630580B1 (fr) * 1988-04-21 1990-08-03 Hager Electro Appareil modulaire de protection ou de commande electrique

Also Published As

Publication number Publication date
TW371771B (en) 1999-10-11
TR199600518A2 (tr) 1997-01-21
TNSN96086A1 (fr) 1998-12-31
HUP9601552A3 (en) 2000-10-30
FR2735614A1 (fr) 1996-12-20
HU9601552D0 (en) 1996-07-29
DE69618873D1 (de) 2002-03-14
CN1142119A (zh) 1997-02-05
CN1066846C (zh) 2001-06-06
HUP9601552A2 (en) 1997-05-28
EP0760524A1 (de) 1997-03-05
FR2735614B1 (fr) 1997-07-18

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