EP1643530B1 - Entraîneur réglable pour appareil de protection de lignes électriques - Google Patents

Entraîneur réglable pour appareil de protection de lignes électriques Download PDF

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Publication number
EP1643530B1
EP1643530B1 EP20040360089 EP04360089A EP1643530B1 EP 1643530 B1 EP1643530 B1 EP 1643530B1 EP 20040360089 EP20040360089 EP 20040360089 EP 04360089 A EP04360089 A EP 04360089A EP 1643530 B1 EP1643530 B1 EP 1643530B1
Authority
EP
European Patent Office
Prior art keywords
electric
bimetal
electric apparatus
fixed
locking mechanism
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 - Fee Related
Application number
EP20040360089
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1643530A1 (fr
Inventor
Nikola Puh
David Weil
Francis Diebold
David Haag
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.)
Hager Electro SAS
Original Assignee
Hager Electro 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 Hager Electro SAS filed Critical Hager Electro SAS
Priority to DE602004007522T priority Critical patent/DE602004007522T2/de
Priority to EP20040360089 priority patent/EP1643530B1/fr
Priority to ES04360089T priority patent/ES2290652T3/es
Priority to CN 200510108833 priority patent/CN1767120B/zh
Publication of EP1643530A1 publication Critical patent/EP1643530A1/fr
Application granted granted Critical
Publication of EP1643530B1 publication Critical patent/EP1643530B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the present invention relates to the technical field of electrical devices, and more particularly to the field of modular electrical devices of the circuit breaker or switch type, used for the protection of lines to ensure the safety of people.
  • the invention relates, more precisely still, to the actuation of a lock mechanism such as those fitted to magnetothermic trip circuit breakers or devices of this type, for example phase circuit breakers.
  • Line protection circuit breakers conventionally comprise, in an insulating housing, a circuit extending between two terminals and comprising a thermal trip bimetallic strip for protection against electrical overloads and an electromagnetic actuator essentially having a coil cooperating with a mobile magnetic core. associated with a firing pin, to ensure in case of overcurrent tripping by opening a movable contact cooperating with one or more fixed contacts.
  • the phase and neutral circuit breakers comprise, in addition to the phase stage as described, a neutral stage also with fixed and movable contacts, the moving neutral contact being actuated jointly with the moving phase contact.
  • the displacement of the movable contact towards or away from the fixed contact is conventionally controlled by a lock mechanism of the toggle type, operated manually by a control handle. driving a rod tending to push a pivoting contact door to bring the movable contact or contact each with a fixed contact, in which position the reverse movement is normally prevented by a pawl prohibiting the link, a knee-type support on the door contact, to escape and to release this one.
  • the thermal subassembly comprising the bimetallic strip is therefore intended to unlock the lock mechanism so as to release or open the electrical contacts and interrupt the flow of current in the modular apparatus.
  • the unlocking of the lock must take place when the intensity flowing in the electrical circuit exceeds a predetermined threshold. It is therefore necessary to make a precise adjustment of the positioning of the bimetal so that its deflection is sufficient, once this threshold is reached, to ensure tripping.
  • the reliability and accuracy of operation of the modular electrical appliance are at this price.
  • the devices must therefore be equipped with adjustment means to ensure a positioning of the bimetallic compatible with the desired tripping threshold. This positioning and trigger management must also take into account the existence, between the bimetallic strip and the lock mechanism, a coach.
  • Positioning adjustment is conventionally performed by deformation of an elastic piece, for example metallic, supporting the bimetallic strip.
  • a condition for the effectiveness of the adjustment is the stability of the trigger threshold, and thus the stability of the positioning of the bimetal: it is therefore essential that the deformation of the elastic part is perfectly reversible, which implies that one remains, at during operation, below the elastic limit of the constituent material of the piece supporting the bimetallic strip.
  • the object of the present invention is to provide a thermal protection subassembly for modular electrical apparatus ensuring accurately and reliably a predetermined tripping threshold, while avoiding the risk of default of reversibility in particular attributable to elastic supports when setting the trigger threshold.
  • Another object of the present invention is to simplify the constituent elements of this thermal subassembly, as well as assembly operations of said subassembly in the modular electrical apparatus.
  • the adjustment means is integrated in the trainer.
  • plastic housing This eliminates the referential represented by the plastic housing, whose dimensional variations in particular related to changes in hygrometry can affect the setting of the bimetallic strip.
  • the plastics selected for the housings are indeed sensitive to ambient humidity, and undergo deformations that may affect the position of the bimetal cold, and therefore the triggering of the product. It is certainly possible to find plastics that are insensitive to hygrometric variations, but their cost is higher, and the deterrent financial impact for a case.
  • the driver slides in translation in the housing and has two active contact zones at the opposite orientation with respect to the sliding direction, said active zones being provided respectively for being driven by the bimetal and for acting on the mechanism. lock, the adjustment means for changing the distance between them.
  • the adjustment means act on the positioning of at least one of the active areas relative to each other.
  • the coach has the shape of a U whose bottom slides in the housing and the jambs comprise the active areas.
  • the bottom of the U provides a sliding guide / sliding element, while the legs have opposite orientation zones which are easily associated with adjusting means to change the distance between them.
  • the active zone cooperating with the bimetallic strip consists of the free end of an element protruding from a leg in the direction of the bimetal and adjustable parallel to the bottom of the coach.
  • the adjustment is therefore parallel to the displacement, which is in the sense of optimizing each adjustment operation.
  • said adjustable element is a self-tapping screw attached to the jamb.
  • Adjustment manipulation is simple, as is the fixing of the adjustable element to a jamb: in terms of industrialization, this solution is favorable and inexpensive.
  • the element protruding from the jamb is turned towards the inside of the U, the other active zone cooperating with the lock mechanism being consequently also oriented towards the inside of the U.
  • the coach partially surrounds the lock mechanism, and the two active areas face each other.
  • the apparatus of the invention comprises an electromagnetic subassembly ensuring the disjunction of the fixed and movable electrical contacts in the event of a short-circuit
  • the bimetal has for example an end welded on one end of the coil of said sub. electromagnetic assembly, which is fixed relative to the housing.
  • the present invention relates, for example, to a modular electric appliance comprising a plastic housing (not shown) with which a support structure (1) partially shown in FIGS. 4 and 5 cooperates.
  • the electrical appliance more precisely comprises at least two connection terminals. electric and a control handle (2) movable between two stable positions and driving a lock mechanism (3) controlling the opening and closing of the electrical connection between the two connection terminals.
  • a fixed electrical contact and a movable electrical contact respectively open and close the electrical connection under the action of the lock mechanism (3).
  • the movable electrical contact (4) is directly driven by the lock mechanism.
  • the fixed electrical contact is for example constituted by a contact pad (5) integral with an induction coil (6) (see FIG. 1).
  • the electrical apparatus further comprises a bimetallic strip (7) acting on the lock mechanism (3) via a driver (8).
  • the driver (8) is shown in more detail in Figures 1, 2 and 3 and moves in the housings to act on the lock mechanism (3). It has an end (8a) shaped to act on the lock mechanism (3) to release the movable electrical contact (4) of the fixed electrical contact (5).
  • the setting means of the trigger threshold are, according to the invention, integrated into the trainer (8).
  • the movable element (11), which is actually the adjustment means, is disposed in a stop (8b) of the driver, and in this case takes the form of a self-tapping screw (11) whose end free is the active surface (10).
  • the stop (8a) acts via its surface (8c) on the lock mechanism (3), while the stop (8b) adjustable according to the position of the screw (11) interacts with the bimetallic strip (7).
  • the screw (11) is for example screwed to the bottom of a bore (12) formed in the constituent material of the driver (8).
  • the distance between the active surfaces (8c, 10) is adjusted to match that between the bimetallic strip (7) and the lock mechanism (3), or more particularly the wall of said mechanism (3) against which the active surface (8c) acts.
  • the electrical apparatus when it comprises an electromagnetic subassembly ensuring the disjunction of the fixed and mobile electrical contacts in the event of sudden overcurrent, is equipped with an induction coil (6), an example of which is shown in FIG. 1.
  • the other end (7b) of the bimetal (7) can then for example be fixed on one end (14) of said coil (6).
  • the electric current thus passes through the induction coil (6) and the bimetallic strip (7), on which is also connected an electric connection braid (not shown).
  • Fixing the bimetallic strip (7) on the end (14) of the induction coil (6) is by any known means and in particular by means of soldering points.
  • Figures 4 and 5 show the bimetal (7) in two positions respectively corresponding to a rest position and an active position. The latter makes it possible to release the movable electrical contact (4) from the fixed electrical contact (5) in response to a reversible deformation of the bimetallic strip (7).
  • the free end (7a) then bears on the movable stop (10) to drive in translation the driver (8), which in turn acts on the lock mechanism (3).
  • the modular electrical device according to the invention is for example constituted by an electric circuit breaker.
  • the modular electrical apparatus may be an electrical switch.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
EP20040360089 2004-10-01 2004-10-01 Entraîneur réglable pour appareil de protection de lignes électriques Expired - Fee Related EP1643530B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE602004007522T DE602004007522T2 (de) 2004-10-01 2004-10-01 Regulierbarer Antrieb für eine Stromleitung-Schutz-Vorrichtung
EP20040360089 EP1643530B1 (fr) 2004-10-01 2004-10-01 Entraîneur réglable pour appareil de protection de lignes électriques
ES04360089T ES2290652T3 (es) 2004-10-01 2004-10-01 Accionador regulable para aparato de proteccion de lineas electricas.
CN 200510108833 CN1767120B (zh) 2004-10-01 2005-09-30 电路保护装置的可调节跳闸杆

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040360089 EP1643530B1 (fr) 2004-10-01 2004-10-01 Entraîneur réglable pour appareil de protection de lignes électriques

Publications (2)

Publication Number Publication Date
EP1643530A1 EP1643530A1 (fr) 2006-04-05
EP1643530B1 true EP1643530B1 (fr) 2007-07-11

Family

ID=34931784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040360089 Expired - Fee Related EP1643530B1 (fr) 2004-10-01 2004-10-01 Entraîneur réglable pour appareil de protection de lignes électriques

Country Status (4)

Country Link
EP (1) EP1643530B1 (zh)
CN (1) CN1767120B (zh)
DE (1) DE602004007522T2 (zh)
ES (1) ES2290652T3 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3126059A1 (fr) 2021-08-06 2023-02-10 Schneider Electric Industries Sas Dispositif de protection électrique à déclencheur thermique, tableau électrique comprenant un tel dispositif et procédé de réglage d’un tel dispositif

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313098A (en) * 1980-01-16 1982-01-26 Westinghouse Electric Corp. Circuit interrupter trip unit
CN1016476B (zh) * 1985-10-26 1992-04-29 西屋电气公司 具有双金属和校准调节装置的断路器
FR2648615B1 (fr) * 1989-06-16 1991-09-13 Hager Electro Perfectionnements aux interrupteurs a coupure automatique, notamment aux disjoncteurs et disjoncteurs differentiels
DE69200059D1 (de) * 1992-05-13 1994-04-07 Hager Electro Schaltschloss für Schutzschalter und Schutzschalter, mit diesem integriert.
FR2735614B1 (fr) * 1995-06-19 1997-07-18 Schneider Electric Sa Dispositif de reglage du declencheur thermique d'un disjoncteur
IT1302051B1 (it) * 1998-09-08 2000-07-20 Gewiss Spa Interruttore elettrico magnetotermico.
US6445274B1 (en) * 2000-11-10 2002-09-03 Eaton Corporation Circuit interrupter with thermal trip adjustability
CN2489459Y (zh) * 2001-05-28 2002-05-01 Lg产电株式会社 电路跳闸装置

Also Published As

Publication number Publication date
CN1767120B (zh) 2010-09-01
EP1643530A1 (fr) 2006-04-05
DE602004007522T2 (de) 2008-03-13
CN1767120A (zh) 2006-05-03
DE602004007522D1 (de) 2007-08-23
ES2290652T3 (es) 2008-02-16

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