EP0094859B1 - Bouton test pour un déclencheur différentiel - Google Patents

Bouton test pour un déclencheur différentiel Download PDF

Info

Publication number
EP0094859B1
EP0094859B1 EP19830400874 EP83400874A EP0094859B1 EP 0094859 B1 EP0094859 B1 EP 0094859B1 EP 19830400874 EP19830400874 EP 19830400874 EP 83400874 A EP83400874 A EP 83400874A EP 0094859 B1 EP0094859 B1 EP 0094859B1
Authority
EP
European Patent Office
Prior art keywords
button
push button
hole
spring blade
push
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
Application number
EP19830400874
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0094859A1 (fr
Inventor
Patrick De Robertis
Louis-Paul Cotte
Patrick Rousset
Jacques Perret
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0094859A1 publication Critical patent/EP0094859A1/fr
Application granted granted Critical
Publication of EP0094859B1 publication Critical patent/EP0094859B1/fr
Expired legal-status Critical Current

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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
    • H01H83/02—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
    • 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
    • H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit

Definitions

  • the invention relates to a differential tripping device according to the preamble of claim 1.
  • a triggering device of the kind mentioned, for example described in French patent No. S 2437692 or 2241868, comprises a test circuit actuated by the depressing of a push button. By pressing the push button, a bypass is closed comprising a control resistor which bypasses the differential current transformer and simulates a differential fault.
  • Safety means limit the duration of closure of the switch to avoid destruction of the resistance.
  • Known devices can be the cause of untimely tripping, in particular during an untimely closing, for example due to priming between the contacts of the switch of the test circuit.
  • the object of the present invention is to remedy this drawback by implementing the features mentioned in claim 1.
  • the elastic blade By retracting the elastic blade constituting the movable contact inside the push-button of insulating material, the risks of priming between the contacts of the test switch are substantially reduced or / and practically excluded.
  • the elastic blade extends longitudinally inside an elongated recess formed in the push button, being interposed between a fixed stop and the bottom of the recess so that the pushing of the push button, resulting by bringing the bottom of the recess and the stop closer together, this causes the elastic blade to be deformed and protrudes from the free end of this blade.
  • This free end is advantageously curved to facilitate deformation and exit through a slot in the push button in the vicinity of the bottom of the recess.
  • the elastic blade can be arranged as a return spring or be associated with a return spring housed inside the recess of the push button.
  • test button is described below in its application to a differential trigger block according to French patent N ° 2437692, which will advantageously be referred to for further details, and it suffices to recall that the differential block comprises a test button constituted by a button, the pressing of which simulates a differential fault by inserting an electrical resistance in a manner well known to specialists.
  • the test button carries a movable contact 12 coming into contact, in the depressed position of the push button 10, of a semi-fixed contact 14 formed by the end of a spiral spring 16 in support of a movable stop 18.
  • the end accompanies the stop 18 in its movement and the assembly is arranged in such a way that the contacts 12, 14 can only be closed on the double condition of pressing the push-button 10 and pivoting it.
  • the stop 18 in an extreme position corresponding to the closing of the circuit breaker coupled to the differential unit.
  • the contact 14 disappears as soon as the circuit breaker opens to limit the duration of supply of the shunt resistor.
  • the push button 10 has in its lower part a longitudinal recess 20 open at its base 22.
  • the push button 10 is slidably mounted in abutment on one face 24 of the mechanism housing and the recess 20 is open on the side of the face 24, but it is clear that the recess 20 can be completely closed on all sides.
  • the recess 20 communicates with a slot 26 formed on the face of the push-button 10 opposite the contact 14 in the vicinity of the bottom 28 of the recess 20.
  • the slot 26 is confined by a guide spout 30 whose function will emerge from the description below.
  • the movable contact actuated by the push button 10 is constituted by an elastic blade 32 extending longitudinally inside the recess 20 while being fixed at its base by a folded part 34 to a fixed support 36 of the housing.
  • the opposite end 38 of the elastic blade 32 is curved along the spout 30 to enter the slot 26.
  • a spiral return spring 40 is interposed between the spout 30 and the fixed stop 36 to urge the push button 10 in rest and open position of the test switch.
  • the assembly is arranged in such a way that in the open position of the test switch, the end 38 of the blade 32 constituting the movable contact of the switch is retracted inside the recess 20, preventing any risk of priming between contacts 14, 38.
  • Fig. 2 shows the switch in the closed position and it can be seen that when the push-button 10 is pressed the elastic blade 32 in support of the bottom 28 is folded back to project the end 38 which comes into contact with the contact 14 The deformation of the elastic blade 32 is facilitated and guided by the rounded shape of the spout 30.
  • the elastic blade 32 flexes, the rectilinear part bears on the adjacent face 24, so as to avoid the risks of buckling.
  • the rectilinear part of the elastic blade 32 can also be guided by any suitable means.
  • the return spring 40 pushes the push button 10 in the rest position and the elastic blade 32 automatically returns by its own elasticity and possibly by the action of the spout 30 in its original retraction position. It is needless to note that the assembly is particularly simple and that the bulk of the switch according to the invention is comparable to that of conventional switches.
  • the contact device with retractable elastic blade can be used with switches of another type, for example in which the end 38 would come into contact with a fixed contact pad or be introduced into a clamp. contact.

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  • Breakers (AREA)
EP19830400874 1982-05-11 1983-05-02 Bouton test pour un déclencheur différentiel Expired EP0094859B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208318A FR2526995A1 (fr) 1982-05-11 1982-05-11 Bouton test pour un declencheur differentiel
FR8208318 1982-05-11

Publications (2)

Publication Number Publication Date
EP0094859A1 EP0094859A1 (fr) 1983-11-23
EP0094859B1 true EP0094859B1 (fr) 1985-12-18

Family

ID=9273986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830400874 Expired EP0094859B1 (fr) 1982-05-11 1983-05-02 Bouton test pour un déclencheur différentiel

Country Status (4)

Country Link
EP (1) EP0094859B1 (en:Method)
DE (1) DE3361545D1 (en:Method)
ES (1) ES8403239A1 (en:Method)
FR (1) FR2526995A1 (en:Method)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10329115B4 (de) * 2003-06-27 2005-09-29 Siemens Ag Schutzschaltvorrichtung mit Prüftaste
DE102004005985A1 (de) * 2004-02-06 2005-09-08 Siemens Ag Fehlerstromschutzschaltvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789268A (en) * 1972-12-29 1974-01-29 Gen Electric Miniature circuit breaker with electronic tripping means
FR2241868B1 (en:Method) * 1973-08-20 1976-06-18 Merlin Gerin
FR2437692A1 (fr) * 1978-09-28 1980-04-25 Merlin Gerin Dispositif de protection differentielle a bloc differentiel accouple au bloc disjoncteur

Also Published As

Publication number Publication date
ES522180A0 (es) 1984-03-16
FR2526995B1 (en:Method) 1985-02-08
EP0094859A1 (fr) 1983-11-23
FR2526995A1 (fr) 1983-11-18
ES8403239A1 (es) 1984-03-16
DE3361545D1 (en) 1986-01-30

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