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EP1487003B1 - Dispositif de réenclenchement automatique pour le déclenchement intempestif d'un interrupteur - Google Patents

Dispositif de réenclenchement automatique pour le déclenchement intempestif d'un interrupteur Download PDF

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Publication number
EP1487003B1
EP1487003B1 EP04002045A EP04002045A EP1487003B1 EP 1487003 B1 EP1487003 B1 EP 1487003B1 EP 04002045 A EP04002045 A EP 04002045A EP 04002045 A EP04002045 A EP 04002045A EP 1487003 B1 EP1487003 B1 EP 1487003B1
Authority
EP
European Patent Office
Prior art keywords
lever
actuation
drum
reset
microswitch
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
EP04002045A
Other languages
German (de)
English (en)
Other versions
EP1487003A1 (fr
Inventor
Domenico Bosatelli
Sergio Pianezzola
Augusto Contardi
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.)
Gewiss SpA
Original Assignee
Gewiss SpA
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Filing date
Publication date
Application filed by Gewiss SpA filed Critical Gewiss SpA
Publication of EP1487003A1 publication Critical patent/EP1487003A1/fr
Application granted granted Critical
Publication of EP1487003B1 publication Critical patent/EP1487003B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H75/00Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
    • H01H75/02Details
    • H01H75/04Reset mechanisms for automatically reclosing a limited number of times

Definitions

  • the present invention relates to an automatic reset device for untimely trippings of circuit breakers and electrical safety equipment in general.
  • circuit breakers and residual current-operated devices use mechanisms that allow to open and close the moving contact both by operating an external handle, that can be accessed by the user, and by means of the automatic action of protection devices provided inside it.
  • protection devices may trip in an untimely fashion, i.e., when no actual anomaly of the circuit has occurred.
  • the untimely tripping of the device naturally causes inconvenience to the user, who has to reach the electrical panel and restore the circuit by operating the appropriately provided levers.
  • the circuit breakers may trip and the circuit remains open until it is reactivated by the user. If the user is not present for several days, damage can be substantial: one merely needs to consider refrigerators, freezers or other critical appliances.
  • An aim of the present invention is to provide a reset device for untimely trippings of circuit breakers and electrical safety equipment in general, which is capable of automatically restoring the circuit even without human intervention.
  • An object of the invention is to provide a device that is capable of distinguishing between an untimely tripping and tripping due to an actual circuit anomaly.
  • a further object of the invention is to provide a device that can be applied to existing electrical equipment and is absolutely compatible with them.
  • a further object is to provide a device that has components that are easily commercially available and at low costs.
  • a device generally designated by the reference numeral 1, includes a casing 2 that has the classic standardized shape and forms, at its rear face 3, a means for coupling to other pieces of equipment that are associated with an omega-shaped rail (not shown), according to DIN standards.
  • the casing 2 has, at its front face, a protrusion 4 in which an actuation drum 5 is positioned.
  • the actuation drum is associated with an actuation lever 6 by means of a bar 7 that is pivoted to the lever 6 and has one end that can slide in a slot 8 of the drum 5.
  • An actuation spring 9 has one end that is fixed to a slider 10, in which the actuation spring is accommodated, and another end that is rigidly coupled to the actuation lever 6.
  • the slider 10 accommodates, in a position that is parallel to the actuation spring 9, a return spring 11, in which one end is in abutment against a wall of the slider 10 and the other end is in abutment against a fixed abutment 12 that is rigidly coupled to the casing 2.
  • the thermal actuator includes a heating member 15 that is supplied with power by an electric circuit that includes a microswitch 16.
  • the microswitch 16 opens or closes the power supply circuit of the heating member 15 of the thermal actuator 13 by way of the action of an elastic rocker 17 that acts on a pushbutton 116 of the microswitch 16.
  • the elastic rocker 17 is in turn actuated by a locking lever 18 that is associated with the drum 5.
  • the locking lever 18 actuates an indicator lever 19, also associated with the drum 5, at an opening 20 that is formed in the protrusion 4.
  • the device 1 is constituted by a casing that has a standardized shape so that it can be arranged side-by-side with respect to other standard modules and in particular with respect to a circuit breaker 101.
  • the mechanism of the reset device is connected to the mechanism of the circuit breaker 101 by means of a bar that has a triangular cross-section and constitutes the rotation axis of the drum 5, so that the rotation of the drum 5 exactly matches the rotation of the drum of the circuit breaker 101, which is provided with the usual external actuation lever.
  • the reset device 1 comprises an oscillating flap 50 or a sliding flap 150 that covers the actuation lever 70 of the circuit breaker when the flap 50 or 150 is in the closed position.
  • the function of the flap 50, 150 is to indicate clearly the activation or deactivation of the device and prevent any accidental activation thereof. It is in fact evident that the device must not automatically reset a circuit breaker that has been deactivated intentionally, for example in order to work on the line.
  • the flap 50, 150 deactivates the device when it is in the open position, shown in Figures 9 and 18, by means of a projection 51, 151, which, when the flap 50, 150 is in the open position, no longer retains a deactivation lever 21 that is associated with the elastic rocker 17, so that the elastic rocker 17 remains, by virtue of the elastic member included therein, in a position in which the contact is open and therefore the circuit is open, so that the microswitch 16 is not supplied with power.
  • the cover also covers the test button of a residual current-operated device, in the closed position, forcing the user to open the cover and then deactivate the system before opening the circuit even if he intends to do so by using the test button.
  • the microswitch 16 is open, since the elastic rocker 17 in fact does not act on the pushbutton 116 of the microswitch 17 and therefore the thermal actuator is deactivated, since the heater 15 does not receive power.
  • the mechanism is in an overtravel position and the actuation spring 9 is not loaded.
  • the heat-sensitive material contained in the body of the thermal actuator by being heated by the heater 15, pushes outward the piston 14.
  • the piston 14 acts on the slider 10, moving it to the left with reference to the figures, until it reaches the position shown in Figures 3 and 4.
  • the slider 10 trips the release lever 22, which frees the actuation lever 6 which, by being pulled by the actuation spring 9, acts on the actuation bar 7, turning the drum 5 into the position in which the circuit breaker is again closed.
  • the reset time of the circuit breaker depends substantially on the time taken by the thermal actuator to reach the end of its stroke and can be for example approximately 1-1.5 minutes.
  • the operating time of the actuator is used in order to obtain a reset delay that is considered ideal, but it is obvious that the delay can be reduced or increased according to the specific requirements by varying the reset mechanism.
  • the thermal actuator might be actuated before tripping in order to arm the actuation spring, which would be always loaded and ready to act in order to reset the system instantly or a few seconds after tripping instead of after over one minute, as in the illustrated example.
  • the device as described above prevents subsequent resetting if, after the first resetting after a first tripping, the system trips immediately after resetting has occurred during a persistent fault.
  • the device in fact enters a lockout mode if the system trips immediately after resetting and no longer performs any resetting unless the operator intervenes manually.
  • the reset device can be provided with an additional safety system that prevents the automatic resetting in the presence of an actual and continuous anomaly of the circuit that would make any further reset attempt dangerous.
  • the automatic reset device would therefore be provided with an electronic system suitable to detect the fault on the line and to place the reset device in lockout mode, indicating this lockout externally by virtue of a signal that appears at the window 20.
  • the mechanical signal can of course be replaced with one or more visual and/or acoustic signals of the electronic type, such as LEDs, buzzers, et cetera, actuated by the auxiliary electronic control circuit.
  • Figures 7 and 8 illustrate the lockout condition of the device, in which substantially the microswitch 16 is not operated, preventing the elastic rocker 17 from actuating the pushbutton 116.
  • the elastic rocker 17 is locked by the locking lever 25, actuated by means of a pivot, not shown, that is part of the mechanism of the circuit breaker 101 and enters the casing 2 through the slot 26.
  • the lockout condition of the device is indicated by means of the indicator lever 19, which is actuated by the locking lever 18, for example by means of a colored indicator that becomes visible through the opening 20.
  • the locking lever 25 can be eliminated if the device is applied to a residual current-operated device that does not have a tripped-mode lever and therefore does not act on the locking lever 25.
  • the invention achieves the intended aim and objects, a device having been provided which is capable of automatically resetting, after a reasonable time interval, a circuit breaker that has tripped needlessly.
  • An important advantage of the invention is due to the use of a simple thermal actuator, which constitutes a reliable and extremely cheap motor, in addition to providing, by its very own nature, an ideal automatic reset time.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (18)

  1. Dispositif de réarmement automatique pour le déclenchement intempestif de disjoncteurs et d'équipements de sécurité électrique en général, comprenant un mécanisme qui est adapté pour être associé mécaniquement à un élément de réarmement d'un dispositif électrique, ledit mécanisme étant adapté pour réarmer automatiquement ledit dispositif électrique un temps prédéterminé après son déclenchement, caractérisé en ce que ledit mécanisme comprend un actionneur thermique à moteur à cire (13) qui agit sur ledit mécanisme lorsque le dispositif électrique s'est déclenché de sorte que le mécanisme réarme ledit dispositif électrique.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un boîtier (2) qui a une forme normalisée et qui forme, au niveau de sa face arrière (3), des moyens pour un couplage à un dispositif électrique et à un rail en oméga selon les normes DIN.
  3. Dispositif selon la revendication 2, caractérisé en ce que ledit boîtier comporte, au niveau de sa face avant, une protubérance (4) dans laquelle un tambour d'actionnement (5) est positionné, ledit tambour d'actionnement étant associé à un levier d'actionnement (6) au moyen d'une barre d'actionnement (7) qui pivote par rapport au levier (6) et qui a une extrémité qui peut coulisser dans une fente (8) dudit tambour (5).
  4. Dispositif selon la revendication 3, caractérisé en ce qu'il comprend un ressort d'actionnement (9) dans lequel une première extrémité est fixée à un coulisseau (10), qui reçoit ledit ressort d'actionnement (9), et une deuxième extrémité est associée rigidement audit levier d'actionnement (6), ledit coulisseau (10) recevant, parallèlement audit ressort d'actionnement, un ressort de rappel (11) dans lequel une première extrémité est en butée contre une paroi du coulisseau (10) et l'autre extrémité est en butée contre une butée fixe (12) qui est accouplée rigidement avec ledit boîtier.
  5. Dispositif selon la revendication 4, caractérisé en ce que ledit actionneur thermique (13) est appliqué audit boîtier (2) et comporte un piston d'actionnement (14) qui agit sur ledit coulisseau (10) ; ledit actionneur thermique comprenant un élément chauffant (15) qui est alimenté par un circuit électrique qui comprend un micro-commutateur (16).
  6. Dispositif selon la revendication 5, caractérisé en ce que ledit micro-commutateur (16) ferme ou ouvre ledit circuit d'alimentation de l'élément chauffant (15) de l'actionneur thermique (13) au moyen de l'action d'un balancier élastique (17) qui agit sur un bouton-poussoir (116) du micro-commutateur (16).
  7. Dispositif selon la revendication 6, caractérisé en ce que ledit balancier élastique (17) est actionné par un levier de verrouillage (18) qui est associé audit tambour (5).
  8. Dispositif selon la revendication 7, caractérisé en ce que ledit levier de verrouillage (18) actionne un levier d'indicateur (19) qui est associé au tambour (5) au niveau d'une ouverture (20) prévue dans ladite protubérance (4).
  9. Dispositif selon la revendication 8, caractérisé en ce que son mécanisme est connecté au mécanisme d'un dispositif électrique (101) au moyen d'une barre qui a une section transversale triangulaire et qui constitue l'axe de rotation du tambour (5), de sorte que la rotation du tambour (5) du dispositif de réarmement (1) corresponde exactement à la rotation du tambour du dispositif électrique (101), qui est pourvu d'un levier d'actionnement externe (70).
  10. Dispositif selon la revendication 9, caractérisé en ce qu'il comprend un volet oscillant (50) ou coulissant (150) qui recouvre ledit levier d'actionnement (70) du dispositif électrique (101) lorsque ledit volet est dans la position fermée, afin d'indiquer clairement l'activation ou la désactivation du dispositif et empêcher toute activation accidentelle de celui-ci.
  11. Dispositif selon la revendication 10, caractérisé en ce que ledit volet (50, 150) désactive le dispositif (1) lorsqu'il est dans la position ouverte au moyen d'une protubérance (51, 151) qui, lorsque ledit volet (50, 150) est dans la position ouverte, ne retient pas un levier de désactivation (21) qui est associé audit balancier élastique (17), de sorte que ledit balancier élastique (17) reste, au moyen d'un élément élastique compris dans celui-ci, dans une position dans laquelle le contact est ouvert et, par conséquent, le circuit est ouvert, de sorte que ledit micro-commutateur (16) n'est pas alimenté.
  12. Dispositif selon la revendication 11, caractérisé en ce que ledit volet (50, 150) ne peut pas être déplacé de sa position ouverte vers sa position fermée sans déplacer d'abord vers la position fermée ledit levier (70) dudit dispositif électrique (101).
  13. Dispositif selon la revendication 12, caractérisé en ce qu'il comprend un levier de libération (22) qui pivote par rapport audit levier d'actionnement (6) et qui est pourvu d'une dent (23) qui vient en prise avec une butée fixe (24) dudit boîtier (2).
  14. Dispositif selon la revendication 13, caractérisé en ce qu'il comprend un système de sécurité qui empêche un réarmement automatique en présence d'une anomalie réelle et continue du circuit qui rendrait toute tentative de réarmement supplémentaire dangereuse.
  15. Dispositif selon la revendication 14, caractérisé en ce que, dans la condition dans laquelle le dispositif est dans un mode de verrouillage, ledit micro-commutateur (16) n'est pas actionné, empêchant ledit balancier élastique (17) d'actionner le bouton-poussoir (116) du micro-commutateur (16).
  16. Dispositif selon la revendication 15, caractérisé en ce que ledit balancier élastique (17) peut être libéré du fait de l'actionnement du levier de verrouillage (25) au moyen d'un pivot qui fait partie du mécanisme du dispositif électrique (101) et qui pénètre dans ledit boîtier (2) à travers une fente (26).
  17. Dispositif selon la revendication 16, caractérisé en ce que la condition de verrouillage du dispositif est indiquée au moyen dudit levier d'indicateur (19), qui est actionné par le levier de verrouillage (18), au moyen d'un indicateur coloré qui devient visible à travers une ouverture (20) dudit boîtier (2).
  18. Dispositif selon la revendication 17, caractérisé en ce que ledit système de sécurité comprend un dispositif électronique qui est adapté pour détecter le défaut sur la ligne et pour mettre ledit dispositif de réarmement dans le mode de verrouillage, indiquant ledit mode de verrouillage extérieurement au moyen d'un signal.
EP04002045A 2003-05-20 2004-01-30 Dispositif de réenclenchement automatique pour le déclenchement intempestif d'un interrupteur Expired - Lifetime EP1487003B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000988A ITMI20030988A1 (it) 2003-05-20 2003-05-20 Dispositivo di riarmo automatico per scatti intempestivi di interruttori ed apparecchiature elettriche di sicurezza in genere.
ITMI20030988 2003-05-20

Publications (2)

Publication Number Publication Date
EP1487003A1 EP1487003A1 (fr) 2004-12-15
EP1487003B1 true EP1487003B1 (fr) 2007-07-25

Family

ID=33187380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002045A Expired - Lifetime EP1487003B1 (fr) 2003-05-20 2004-01-30 Dispositif de réenclenchement automatique pour le déclenchement intempestif d'un interrupteur

Country Status (5)

Country Link
EP (1) EP1487003B1 (fr)
AT (1) ATE368294T1 (fr)
DE (1) DE602004007722T2 (fr)
ES (1) ES2287592T3 (fr)
IT (1) ITMI20030988A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024223084A1 (fr) 2023-04-26 2024-10-31 Eaton Intelligent Power Limited Dispositif de réenclenchement automatique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20062033A1 (it) 2006-10-23 2008-04-24 Gewiss Spa Dispositivo di autotest e di riarmo automatico, particolarmente per interruttori differenziali e simili
GB2488808A (en) * 2011-03-09 2012-09-12 Eliyahu Engel Gradual re-activating of one or more power distribution cabinet units
US10295977B2 (en) * 2016-01-25 2019-05-21 Fisher Controls International Llc Smart auto reset for digital positioners connected to a local control panel or push button
DE102021212829A1 (de) 2021-11-16 2023-05-17 Walter Biersack Einrichtung zum Laden von Elektrofahrzeugen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036266A (en) * 1933-04-21 1936-04-07 Bulldog Electric Prod Co Automatic reset circuit breaker
US2614191A (en) * 1949-05-11 1952-10-14 Bertram C Rogers High-voltage breaker and recloser
FR1347856A (fr) * 1962-11-21 1964-01-04 Merlin Gerin Relais thermique à réarmement électrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024223084A1 (fr) 2023-04-26 2024-10-31 Eaton Intelligent Power Limited Dispositif de réenclenchement automatique

Also Published As

Publication number Publication date
DE602004007722D1 (de) 2007-09-06
DE602004007722T2 (de) 2008-04-30
ES2287592T3 (es) 2007-12-16
ATE368294T1 (de) 2007-08-15
EP1487003A1 (fr) 2004-12-15
ITMI20030988A1 (it) 2004-11-21

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