EP0868736A2 - Systeme de declenchement thermique - Google Patents

Systeme de declenchement thermique

Info

Publication number
EP0868736A2
EP0868736A2 EP96946142A EP96946142A EP0868736A2 EP 0868736 A2 EP0868736 A2 EP 0868736A2 EP 96946142 A EP96946142 A EP 96946142A EP 96946142 A EP96946142 A EP 96946142A EP 0868736 A2 EP0868736 A2 EP 0868736A2
Authority
EP
European Patent Office
Prior art keywords
switching element
slide
distance
bearing
differential lever
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
EP96946142A
Other languages
German (de)
English (en)
Other versions
EP0868736B1 (fr
Inventor
Rainer Lewin
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0868736A2 publication Critical patent/EP0868736A2/fr
Application granted granted Critical
Publication of EP0868736B1 publication Critical patent/EP0868736B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49107—Fuse making

Definitions

  • the invention relates to a thermal release system for an electrical switching device with bimetallic strips, a slide with receiving slots in which the bimetallic strips are received, with a switching element for triggering a switching process, with a differential lever which is attached to the slide and by movement of the same its distance from the switching element is shortened in the pushing direction, the differential lever being fastened via a first and a second bearing point on the slide.
  • Such thermal tripping systems are implemented in circuit breakers.
  • the deflection of three bimetallic strips due to overload currents is used for a switching process.
  • the switch is not operated directly, but via the slide, which is adapted to the position of the bimetal strips.
  • the differential lever is pressed against the switching element by the slide and thus triggers the switching process.
  • the components of the switching device are provided with unavoidable tolerances and their arrangement and effect with one another form a tolerance chain. Their effect must be compensated for on the fully assembled switch. For this
  • Switching element and the differential lever to a predetermined. Value a can be set.
  • the invention has for its object to improve a thermal release system of the above type in that previously used adjustment elements can be dispensed with, so as to save costs. According to a further If the invention were to be proposed a method for producing a thermal release system of the type mentioned above, which is particularly simple.
  • the first-mentioned object is achieved in that the first position acts as a fulcrum: and has a specific distance to the switching element in the thrust direction for the release system, and in that the second position depends on this distance in such a way that a predetermined distance value a for the distance from the differential lever to the switching element in the direction of thrust.
  • the two bearing points lie on a straight line oriented essentially transversely to the direction of thrust and the first bearing point serving as the pivot point faces away from the switching element and the second bearing point faces the switching element.
  • the further object relating to a method for manufacturing a thermal release system, is achieved according to the invention in that the slide is manufactured with the first bearing designed as a fulcrum, that the position of the switching element in the electrical switching device is measured, depending on the measured position of the switching element, the second bearing point is calculated and executed on the slide, which is then mounted in the associated switching device.
  • the thermal off 1 generally comprises three bimetallic strips 2, each of which is provided with a heating winding (not shown here), a slide valve 3, a differential lever 4 and a switching element 5.
  • Receiving slots 6 are incorporated in the slide 3, in where the bimetallic strips 2 are stuck.
  • the slide 3 can be displaced in the direction of thrust indicated by a double arrow 7.
  • Attached to the slide 3 is the differential lever 4, which is oriented essentially transversely to the direction of thrust and has a nose 8 at its end facing the switching element 5.
  • This nose 8 has a distance x to the switching element 5 in the direction of thrust, which is dependent on the temperature of the bimetallic strips 2, ie the heating by the load current. In the de-energized state, this distance x should have a defined value a.
  • the differential lever 4 is attached to the slide 3 via two bearing points 9, 10.
  • the first bearing point 9 is a fixed point with respect to the slide 3, which in the de-energized state is at a distance y from the switching element 5 m pushing direction. This distance y depends on the manufacturing tolerances from device to device, ie a device-specific size.
  • the two bearing points 9, 10 are preferably located on a straight line that is oriented essentially transversely to the direction of thrust.
  • the bearing 9 located further away from the switching element 5 expediently serves as a fixed fulcrum.
  • This enables the second bearing point 10 of the differential lever 4 to be adapted to the prescribed position with small angles of rotation, which gives the required distance value x a of the nose 8 to the switching element 5 in the direction of thrust.
  • the slide 3 is manufactured with only one bearing point 9, which serves as a fulcrum.
  • the position of the switching element 5 in the trigger system 1 is measured, which is very precisely possible by triggering the switching process.
  • the position for the second bearing 10 is calculated and this is produced, for example, by stamping.
  • the slide 3 is then fitted into the associated switching device.
  • the second bearing point is designed as a slot 10.

Landscapes

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

Abstract

L'invention concerne un système de déclenchement (1) thermique qui comprend des bilames (2), un coulisseau (3), un élément de commutation (5) pour déclencher un processus de commutation et un levier différentiel (4) qui est fixé sur le coulisseau (3) et réduit son écart (x) par rapport à l'élément de commutation (5) lorsque ledit coulisseau (3) est déplacé dans le sens de poussée. Dans ce système, le mode de logement du levier différentiel (4) sur le coulisseau est amélioré en termes d'adaptation à l'écart (x). A cet effet, le levier différentiel (4) est fixé par un point d'appui (9) se présentant sous forme de pivot (9) par l'intermédiaire duquel l'écart (x) peut être ajusté à une valeur (a) prédéterminée.
EP96946142A 1995-12-22 1996-12-09 Systeme de declenchement thermique Expired - Lifetime EP0868736B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19548479 1995-12-22
DE19548479A DE19548479C2 (de) 1995-12-22 1995-12-22 Thermisches Auslösesystem
PCT/DE1996/002356 WO1997023887A2 (fr) 1995-12-22 1996-12-09 Systeme de declenchement thermique

Publications (2)

Publication Number Publication Date
EP0868736A2 true EP0868736A2 (fr) 1998-10-07
EP0868736B1 EP0868736B1 (fr) 1999-08-25

Family

ID=7781241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96946142A Expired - Lifetime EP0868736B1 (fr) 1995-12-22 1996-12-09 Systeme de declenchement thermique

Country Status (5)

Country Link
US (1) US6014803A (fr)
EP (1) EP0868736B1 (fr)
JP (1) JP2000506665A (fr)
DE (2) DE19548479C2 (fr)
WO (1) WO1997023887A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104901A1 (de) * 2001-02-03 2002-08-08 Abb Patent Gmbh Verfahren zum Justieren des thermischen Auslösesystems eines elektrischen Schaltgerätes, insbesondere eines Motorschutzschalters
DE102008062527B4 (de) * 2008-12-16 2022-08-11 Abb Schweiz Ag Mehrphasiges elektrisches Schaltgerät mit einem Auslöseschieber sowie ein Auslöseschieber

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149811A1 (de) * 1981-12-16 1983-07-21 Klöckner-Moeller Elektrizitäts GmbH, 5300 Bonn Mehrphasiger thermisch verzoegerter motorschutzschalter
DE3401901A1 (de) * 1984-01-20 1985-08-01 Brown, Boveri & Cie Ag, 6800 Mannheim Thermisches ueberstromrelais mit justierexzenter
DE3415226A1 (de) * 1984-04-21 1985-10-31 Brown, Boveri & Cie Ag, 6800 Mannheim Thermisches ueberstromrelais mit justierbuegel
DE3435228A1 (de) * 1984-09-26 1986-04-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Bimetallausloeser
US4806897A (en) * 1987-12-17 1989-02-21 Eaton Corporation Overload relay having adaptive differential mechanism
FR2667979B1 (fr) * 1990-10-11 1994-04-01 Telemecanique Declencheur thermique differentiel a bilames.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9723887A2 *

Also Published As

Publication number Publication date
EP0868736B1 (fr) 1999-08-25
DE19548479C2 (de) 1999-09-02
DE59602913D1 (de) 1999-09-30
JP2000506665A (ja) 2000-05-30
US6014803A (en) 2000-01-18
WO1997023887A2 (fr) 1997-07-03
WO1997023887A3 (fr) 1997-09-12
DE19548479A1 (de) 1997-06-26

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