EP1261005A1 - Mechanismus für gekapselten Fehlerstromschutzschalter - Google Patents

Mechanismus für gekapselten Fehlerstromschutzschalter Download PDF

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Publication number
EP1261005A1
EP1261005A1 EP02011163A EP02011163A EP1261005A1 EP 1261005 A1 EP1261005 A1 EP 1261005A1 EP 02011163 A EP02011163 A EP 02011163A EP 02011163 A EP02011163 A EP 02011163A EP 1261005 A1 EP1261005 A1 EP 1261005A1
Authority
EP
European Patent Office
Prior art keywords
handle
piston
relay
resetting
spring
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.)
Withdrawn
Application number
EP02011163A
Other languages
English (en)
French (fr)
Inventor
Domenico Bosatelli
Augusto Contardi
Sergio Pianezzola
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
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 Gewiss SpA filed Critical Gewiss SpA
Publication of EP1261005A1 publication Critical patent/EP1261005A1/de
Withdrawn legal-status Critical Current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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1072—Release mechanisms which are reset by opening movement of contacts
    • 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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly

Definitions

  • the present invention relates to a mechanism for an enclosed residual current-operated circuit breaker.
  • Residual current devices are adapted to open circuit breakers when an earth fault current exceeds, for the time optionally selected, the threshold value for which the device has been set.
  • the residual current device has a relay provided with a piston adapted to act on a tripping mechanism connected to the circuit breaker.
  • the relays used in residual current devices are extremely sensitive electromechanical systems and it is necessary to pay great attention during resetting of the mechanism, when one acts on the piston of the relay, in order to avoid damaging the relay.
  • the aim of the present invention is to provide a mechanism, particularly for a residual current-operated circuit breaker, that is improved with respect to the mechanisms used so far.
  • An important object of the invention is to provide a mechanism in which, during the resetting step, the force applied to the piston of the relay is perfectly calibrated according to specific requirements.
  • Another object of the invention is to provide a mechanism that offers the greatest assurance of safety and reliability in operation.
  • Another object is to provide a mechanism that is constructively simple and has a small number of components.
  • the mechanism according to the invention is particularly usable in a residual current device 2 adapted to open a circuit breaker 3 when an earth fault current exceeds the threshold value for which the device has been preset, in a per se known manner.
  • the mechanism 1 of the residual current device is substantially contained in a supporting frame 5 inserted in the body of the device 2 and has a relay 4 provided with a piston 6 which is adapted to act, if tripping occurs, on a release lever 7, which actuates the snap action of a slider 8 pushed by a main release spring 9.
  • the device further comprises a system for adjusting the relay 4, which has an adjustment screw 11 that operates in contrast with an adjustment spring 10.
  • the residual current device further comprises a test circuit, whose main steps of operation are illustrated in Figures 4 to 6.
  • the test circuit has a test button 12, which is pivoted to the pivot 13 and is adapted to act, when pressed, on a test button spring 14, which makes contact with a test button closure contact 15, as shown in Figure 5.
  • the test button spring 14 has a flap 16 which, in the normal operating position of the device, shown in Figure 4, is in contact with a fixed test circuit opening contact 17, but when the test button is pressed, the flap 16 performs a snap action and moves away from the contact 17, interrupting the supply of power to the test circuit, as shown in Figure 6. If a residual current is present, the piston 6 protrudes and, by virtue of the release lever 7, the slider 8 is subjected to a snap action by means of the main release spring.
  • Figure 7 is a partial view of the mechanism 1 shown in the tripped position.
  • the mechanism comprises a resetting handle 18, which is pivoted to the frame 5 of the mechanism in the handle pivot 19 and has a coaxial spring 20 adapted to push the handle 18 in the tripped mechanism position.
  • a cross-member 21 acts on the handle 18 and has an end that is pivoted in the handle 18 and a second end that is engaged in a slot 22 of the slider 8 and in a second slot 32 of the engagement lever 7, so that the longitudinal movement of the slider 8, during tripping, leaves free the end of the cross-member in order to allow the handle to turn due to the spring 20.
  • the relay is reset by means of the handle 18, which actuates a relay resetting lever 23 by means of a relay resetting spring 24.
  • the relay resetting spring 24 is coaxial to the pivot 25 of the relay resetting lever and comprises a first end 27, which is engaged in a slot 26 of the handle 18, and a second end 28, which rests on the relay resetting lever, so that by acting on the handle 18 the action on the resetting lever 23 is mediated by the resetting spring 24 and is not direct. In this manner, the force applied to the piston 6 of the relay is determined exclusively by the adjustment of the resetting spring 24.
  • the slider 8 in its longitudinal movement during tripping, actuates contacts 33 having auxiliary functions, while the free end of the slider acts on the release device of the circuit breaker if the residual current device is arranged below.
  • a particular advantage of the invention is that, during resetting, the force applied to the piston of the relay is perfectly calibrated according to specific requirements.
  • the materials used, as well as the dimensions, may of course be any according to requirements and to the state of the art.
EP02011163A 2001-05-22 2002-05-21 Mechanismus für gekapselten Fehlerstromschutzschalter Withdrawn EP1261005A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20011068 2001-05-22
IT2001MI001068A ITMI20011068A1 (it) 2001-05-22 2001-05-22 Cinematismo per interuttore differenziale scatolato

Publications (1)

Publication Number Publication Date
EP1261005A1 true EP1261005A1 (de) 2002-11-27

Family

ID=11447718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02011163A Withdrawn EP1261005A1 (de) 2001-05-22 2002-05-21 Mechanismus für gekapselten Fehlerstromschutzschalter

Country Status (2)

Country Link
EP (1) EP1261005A1 (de)
IT (1) ITMI20011068A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2455494R1 (es) * 2010-12-22 2014-07-11 Schneider Electric Industries Sas Mecanismo de disparo que protege de corriente residual y circuito interruptor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489587A1 (fr) * 1980-08-30 1982-03-05 Licentia Gmbh Disjoncteur de courant de fuite comportant un interrupteur a touche pour inserer une resistance dans un circuit de courant d'essai
DE3827648A1 (de) * 1988-08-16 1990-02-22 Asea Brown Boveri Elektrischer selbstschalter
DE4429950A1 (de) * 1994-08-24 1996-02-29 Rainer Dipl Phys Berthold Sich halbautomatisch überwachender Fehlerstromschutzschalter
US6172584B1 (en) * 1999-12-20 2001-01-09 General Electric Company Circuit breaker accessory reset system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489587A1 (fr) * 1980-08-30 1982-03-05 Licentia Gmbh Disjoncteur de courant de fuite comportant un interrupteur a touche pour inserer une resistance dans un circuit de courant d'essai
DE3827648A1 (de) * 1988-08-16 1990-02-22 Asea Brown Boveri Elektrischer selbstschalter
DE4429950A1 (de) * 1994-08-24 1996-02-29 Rainer Dipl Phys Berthold Sich halbautomatisch überwachender Fehlerstromschutzschalter
US6172584B1 (en) * 1999-12-20 2001-01-09 General Electric Company Circuit breaker accessory reset system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2455494R1 (es) * 2010-12-22 2014-07-11 Schneider Electric Industries Sas Mecanismo de disparo que protege de corriente residual y circuito interruptor

Also Published As

Publication number Publication date
ITMI20011068A0 (it) 2001-05-22
ITMI20011068A1 (it) 2002-11-22

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