EP0797232A1 - Thermischer Differential-Auslöser mit Bimetall - Google Patents

Thermischer Differential-Auslöser mit Bimetall Download PDF

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Publication number
EP0797232A1
EP0797232A1 EP97400540A EP97400540A EP0797232A1 EP 0797232 A1 EP0797232 A1 EP 0797232A1 EP 97400540 A EP97400540 A EP 97400540A EP 97400540 A EP97400540 A EP 97400540A EP 0797232 A1 EP0797232 A1 EP 0797232A1
Authority
EP
European Patent Office
Prior art keywords
strips
bimetallic
adjustment
strip
bimetallic strip
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
EP97400540A
Other languages
English (en)
French (fr)
Other versions
EP0797232B1 (de
Inventor
Patrick Roger
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 SE
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 SE filed Critical Schneider Electric SE
Publication of EP0797232A1 publication Critical patent/EP0797232A1/de
Application granted granted Critical
Publication of EP0797232B1 publication Critical patent/EP0797232B1/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
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/01—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions
    • 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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/142—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with bimetal elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H2011/0087—Welding switch parts by use of a laser beam

Definitions

  • the present invention relates to a differential thermal trip device for an electrical switching device, in particular for a circuit breaker, comprising a trip device with two strips mounted movable parallel to the same direction and associated with a trip mechanism, as well as several bimetals with opposite faces applicable against the one and the other strip by means of adjustment elements, so that a concomitant or different deflection of the bimetallic strips generates a simultaneous or differential movement of the strips.
  • Such a trigger is known from document FR-2 666 928.
  • a method of adjusting the tripping strokes of bimetallic strips by the use of a single piece for the strips, then by the dissociation of connection zones specific to this part in locations determined by measuring the deflection of the bimetallic strips which causes tripping.
  • each bimetallic strip there is provided for each bimetallic strip an adjustment part housed in a slot which opens towards the end of the bimetallic strip.
  • the positioning of the adjustment piece in the slot causes jamming and does not facilitate welding, in particular when the latter is produced by a laser beam.
  • the object of the present invention is to allow simple and in situ adjustment of the tripping travel of the bimetallic strips of a trigger of the type described, avoiding the risks of jamming and facilitating the operation of fixing the adjusting parts.
  • the adjustment piece is placed before fixing in a freely sliding manner on an inclined edge and free from the head of the bimetallic strip, while being vertically held on the strips.
  • the inclination of the edge allows on the one hand the adjustment part to be positioned vertically on the edge and on the other hand facilitates its fixing, in particular by a laser beam of welding.
  • the two strips of the triggering equipment are obtained by cutting breakable zones from a laying frame and include housings facing each other for the adjustment parts, these housings being arranged to maintain affixed to the bimetallic strips in the inclined position. the adjustment pieces until they are fixed to the bimetallic strips
  • Figure 1 shows in perspective a differential thermal trip device according to the invention.
  • Figure 2 schematically shows a top view of the trigger of Figure 1 after fixing the adjustment pads to the bimetallic strips.
  • Figure 3 shows in elevation the head of a bimetal strip with the adjustment pad associated with it.
  • the differential thermal trip device 10 is intended to be included in an electrical protection device such as a motor circuit breaker, a circuit breaker or a thermal relay, for example three-pole, ensuring the protection of a load against overcurrents or imbalances. phase.
  • an electrical protection device such as a motor circuit breaker, a circuit breaker or a thermal relay, for example three-pole, ensuring the protection of a load against overcurrents or imbalances. phase.
  • the trip device further comprises a trip device 20 provided with two strips 30,40 movable parallel to the direction X and serving as movement detecting devices, concomitant or differentiated, bimetallic strips.
  • the strip 30 comprises abutment surfaces 31a, b, c which can be urged by the respective bimetallic strips, these surfaces 31 being arranged on branches 32a, b, c perpendicular to a bar 33 of the strip oriented along X; similarly, the strip 40 comprises abutment surfaces 41a, b, c which can be urged by the bimetallic strips in the direction X 'opposite to X and arranged on branches 42a, b, c perpendicular to a bar 43 of the strip oriented along X.
  • the strips 30.40 is articulated at points 34.44 a lever 21 capable of acting on a triggering mechanism 14 of which only the attack element has been shown here.
  • the device which has just been described is well known to those skilled in the art, as is its operation; when the bimetallic strips respond identically to a thermal overcurrent stress, they drive the strip 30 and via the lever 21 the strip 40 without relative movement of the latter relative to the strip 30; when the bimetallic strips respond differently to thermal stresses, the advance along X of the strip 40 is braked by one of the bimetallic strips, so that the relative displacement between the strips is translated into an anticipatory rotation of the lever.
  • each bimetallic strip 11 there is provided according to the invention at the head 13 of each bimetallic strip 11 an adjustment part 15a, b, c constituted in the present example by a patch (see figures), but which could also be a needle or another element similar.
  • Each patch 15 cooperates at one end 16 or 17 with an abutment surface 31, 41 of a respective strip 30, 40.
  • the pellets are carried by the strips in side pockets 35,45 formed in the branches 32,42 thereof, the strips being initially assembled or formed in a single rectangular frame 30,40, being kept at a slight distance h above an upper horizontal edge 18 of the head 13 of the bimetallic strips and in contact with a vertical or inclined edge 19 of the head 13, so as to be able to slide freely on this edge, both to be positioned high on it and to move laterally without jamming.
  • the frame 30.40 has at two opposite corners weakened zones 36.46 which will allow, after adjustment, the dissociation by cutting.
  • the patch 15 is then welded, for example by means of a laser beam L, to the edge 19 of the head; this edge is preferably inclined and laterally cleared (see FIG. 3) to allow on the one hand the patch 15 to be applied without fail by gravity against the bimetallic strip at the desired place of welding, on the other hand to position the source of the inclined laser beam L of welding away from the trigger or from the device in which the trigger is housed.
  • the pockets 35,45 formed in the branches 32,42 of the strips include inclined edges 37,47 for carrying the pellets against the inclined edges 19 of the bimetallic strips.
  • a cut, for example by laser or other means of the weakened zones 36, 46 makes it possible to separate the two strips.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Fats And Perfumes (AREA)
  • Lubricants (AREA)
EP97400540A 1996-03-20 1997-03-12 Thermischer Differential-Auslöser mit Bimetall Expired - Lifetime EP0797232B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603567 1996-03-20
FR9603567A FR2746542B1 (fr) 1996-03-20 1996-03-20 Declencheur thermique differentiel a bilames

Publications (2)

Publication Number Publication Date
EP0797232A1 true EP0797232A1 (de) 1997-09-24
EP0797232B1 EP0797232B1 (de) 2002-07-24

Family

ID=9490429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400540A Expired - Lifetime EP0797232B1 (de) 1996-03-20 1997-03-12 Thermischer Differential-Auslöser mit Bimetall

Country Status (7)

Country Link
US (1) US5825273A (de)
EP (1) EP0797232B1 (de)
KR (1) KR970067429A (de)
CN (1) CN1166684A (de)
AT (1) ATE221250T1 (de)
DE (1) DE69714109T2 (de)
FR (1) FR2746542B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19619295C2 (de) * 1996-05-13 2003-10-23 Siemens Ag Justierverfahren für thermische Überlastauslöser
US6095678A (en) * 1997-06-11 2000-08-01 Rockwell Technologies, Llc Method of calibrating a thermal trigger for an electrical switching device
JP4045709B2 (ja) * 1999-04-02 2008-02-13 富士電機機器制御株式会社 回路しゃ断器の熱動形過負荷引外し装置
JP2002093298A (ja) * 2000-09-18 2002-03-29 Fuji Electric Co Ltd 回路しゃ断器
ITMI20012836A1 (it) * 2001-12-28 2003-06-28 Abb Service Srl Componenti di unita' termostatiche e metodo di saldatura laser per illoro ottenimento
US8026784B2 (en) * 2007-08-07 2011-09-27 Hella Kgaa Ganged power circuit switches for on-board electrical system in motor vehicles
CN102800537B (zh) * 2012-07-27 2014-12-10 浙江中凯科技股份有限公司 过电流脱扣器的信号传输机构
CN102867707B (zh) * 2012-09-21 2015-10-28 德力西电气有限公司 一种调节热过载脱扣三相双金同步的方法及其装置
CN102969206B (zh) * 2012-11-13 2014-10-29 德力西电气有限公司 一种电动机保护器脱扣动作一致性调试方法及调试装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002197A1 (en) * 1984-09-26 1986-04-10 Licentia Patent-Verwaltungs-Gmbh Bimetallic trigger
FR2666928A1 (fr) * 1990-09-13 1992-03-20 Telemecanique Procede de reglage de bilames pour interrupteur de protection thermique differentielle.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528539A (en) * 1984-06-28 1985-07-09 Eaton Corporation Reduced-size thermal overload relay
FR2618019B1 (fr) * 1987-07-08 1989-11-17 Telemecanique Electrique Relais thermique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002197A1 (en) * 1984-09-26 1986-04-10 Licentia Patent-Verwaltungs-Gmbh Bimetallic trigger
FR2666928A1 (fr) * 1990-09-13 1992-03-20 Telemecanique Procede de reglage de bilames pour interrupteur de protection thermique differentielle.

Also Published As

Publication number Publication date
CN1166684A (zh) 1997-12-03
ATE221250T1 (de) 2002-08-15
DE69714109T2 (de) 2003-03-06
DE69714109D1 (de) 2002-08-29
FR2746542B1 (fr) 1998-04-24
US5825273A (en) 1998-10-20
EP0797232B1 (de) 2002-07-24
KR970067429A (ko) 1997-10-13
FR2746542A1 (fr) 1997-09-26

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