EP0008558A1 - Selbstschalter mit beweglichem, auf einem beweglichen Rastelement schwenkbar gelagertem, Kontakthebel - Google Patents

Selbstschalter mit beweglichem, auf einem beweglichen Rastelement schwenkbar gelagertem, Kontakthebel Download PDF

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Publication number
EP0008558A1
EP0008558A1 EP79400576A EP79400576A EP0008558A1 EP 0008558 A1 EP0008558 A1 EP 0008558A1 EP 79400576 A EP79400576 A EP 79400576A EP 79400576 A EP79400576 A EP 79400576A EP 0008558 A1 EP0008558 A1 EP 0008558A1
Authority
EP
European Patent Office
Prior art keywords
movable contact
circuit breaker
shoulder
movable
latching
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.)
Ceased
Application number
EP79400576A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Negre
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.)
Legrand SA
Original Assignee
Legrand 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 Legrand SA filed Critical Legrand SA
Publication of EP0008558A1 publication Critical patent/EP0008558A1/de
Ceased 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the present invention relates generally to circuit breakers.
  • a circuit breaker generally comprises, in a housing, a first contact, which is fixed, a second contact, which is movable between a latched closed position and a latched open position, and which is requested in direction of its position triggered by elastic opening means, any trigger member, which is capable of causing the release of said movable contact, and therefore the passage of the latter from its engaged position to its triggered position, a joystick d engagement and release, which is available to the user, and which is movably mounted between an engagement position and a release position, and a latching mechanism, which is established between said trigger member and said switch on and off.
  • the present invention relates more particularly to those of these circuit breakers in which the movable contact is articulated by pivot to a latching member, which belongs to the latching mechanism, and which is itself movably mounted in the housing.
  • the latching mechanism includes in general, a latching member, on which the movable contact is therefore articulated by a pivot, and which is subjected to the triggering member, an operating member, which is linked to the latching lever and trigger, and which in practice is integral therewith, and a retaining member, by which said latching member is capable of releasably engaging said operating member.
  • the corresponding tripping member acts on the latching member and prints on it a sufficient movement so that it escapes the retaining member with which it was hitherto engaged.
  • the attachment provided by the attachment mechanism is therefore broken, and the movable contact, released, departs from the fixed contact under the stress of the elastic opening means associated with it.
  • the movable contact comprises a drive shoulder, on which can come to carry, for its drive, a shoulder provided for this purpose on the attachment member to which it is articulated by pivot.
  • the latching member can involve its own movement in the driving of the movable contact, its shoulder coming to bear against the driving shoulder of said movable contact.
  • the present invention generally relates to a provision allowing, on the contrary, the latching member to apply, upon opening, to the moving contact, a real tearing force actively participating in the takeoff of this moving contact. with respect to the fixed contact to which it has hitherto been applied, without modifying the conditions of movement of the assembly.
  • the present invention relates to a circuit breaker, the latching mechanism of which comprises, as mentioned above, a movable latching member, on which the movable contact is articulated by a pivot, and which is subjected to a tripping member, said movable contact further comprising a drive shoulder on which may come, for its drive, a shoulder provided for this purpose on the latching member,
  • this circuit breaker being characterized in that, apart from the fact of its articulation link with the movable contact and of the possible guiding of the corresponding articulation pivot, the latching member is free to move in the case of the circuit breaker, no fixed stop being provided in this- ci on the path swept at the opening by said organ fastening, so that, upon opening, this fastening member immediately drives the mobile contact by its shoulder, and thus applies a tearing force to the latter, without modifying the corresponding pivot axis .
  • the opening speed of the circuit breaker is advantageously increased.
  • Figures 10 and 11 are views similar to that of Figure 8 and show two successive phases of the operation of this alternative embodiment.
  • Such a circuit breaker generally comprises a housing 10; according to arrangements known in themselves, and which will therefore not be detailed here, such a case is for example formed by two shells suitably facing one another and suitably linked to each other by screws or rivets.
  • the housing 10 is equipped laterally with two connection terminals 11A, 11B.
  • a metal strip 12A which belongs to the copperwork of the circuit breaker; at one of its ends, this strip 12A is in electrical connection with the terminal 11A, and at the other of its ends, it delimits, jointly with another metal strip 12B, a breaking chamber 13 which, in the exemplary embodiment shown, is furnished with extinguishing plates 14.
  • the bands 12A, 12B constitute two arc horns 15A, 15B.
  • the arcing horn 15A also constitutes by itself a fixed contact, with which a movable contact 16 cooperates.
  • this movable contact 16 is movable between a posi latched closing position, Figure 1, for which it is in abutment against the fixed contact 15A, and a triggered opening position, Figure 4, for which it is moved away from this fixed contact 15A, and it is constantly urged in the direction from its triggered opening position by elastic opening means, which will be described below.
  • At least one triggering member is provided, which is capable of causing the release of the movable contact, and therefore the passage of the latter from its engaged position to its triggered position.
  • two such triggering members are provided, one thermal, the other magnetic.
  • the thermal trip member comprises a bimetallic strip 18, one end 19 of which is fixed, while the other end 20 is free; by this free end 20 the bimetallic strip 18 is connected by a braid 21 to the movable contact 16.
  • the magnetic trip member comprises the coil 23 of a magnetic circuit 24, and this coil 23 is inserted in series with the bimetallic strip 18 between the movable contact 16 and the terminal 11B, one of its ends being connected to the fixed end 19 of the bimetallic strip 18 by a conductor, not visible in the figures, while the other of its ends is connected by a metal strip 22 to the terminal 11B.
  • a plunger core 25 In the axis of the winding 23 is movably mounted a plunger core 25.
  • an interlocking and triggering lever 26 which is available to the user, thanks to a passage 27 provided for this purpose in the front wall of the housing 10, and which is movable between a position of engagement, figure 1, and a position of engagement, figure 4.
  • this interlocking and triggering lever 26 is rotatable, being carried by a hub 28 whose pins, not visible in the figures, are pivotally engaged in housings provided for this purpose in the housing 10.
  • the interlocking and triggering lever 26 is urged permanently towards its triggering position, by a torsion spring 29, one branch of which bears on the housing 10 while the another acts on the hub 28.
  • a hooking mechanism which comprises, a member d 'hooking 30, on which the movable contact 16 is articulated by a pivot 31, and which is subjected to one and the other of the triggering members in question, as described below, an operating member 32, which is linked to the engaging and triggering lever 26, and a retaining member 33, by which said latching member 30 is capable of coming into engagement with said operating member 32, as described below.
  • the movable contact 16 carries a recess 34, by which it is engaged on the latching member 30, the longitudinal edges of this recess 34 being, in their middle part , shaped as a gutter, for housing the articulation pivot 31, which passes right through the hooking member 30, and which, at its ends, is engaged in guide grooves 36 provided for this purpose in the housing 10.
  • the elastic opening means associated with the movable contact 16 comprise a torsion spring 37, the central torsion part 38 of which is engaged on the pivot 31, including a branch 39 is supported on a lug 40 fixedly fixed to the housing 10, and the other branch 41 of which bears on the movable contact 16.
  • each of these branches is split, the spring 37 generally having the configuration of a part. in U presenting two wings, which form the branches in question and frame the movable contact 16 and the hooking member 30, with engagement on the pivot 31, and a median part, which connects these wings to each other and relates to the movable contact 16.
  • the operating member 32 is a sector integral with the hub 28 carrying the engagement and release lever 26,
  • the retaining member 33 is a lug, mounted movable on the one hand, by its middle part, in a buttonhole 43 of the sector 32, and on the other hand, by its ends, in buttonholes 36 provided for this purpose in the housing 10, and, for cooperation with such a member retaining, the attachment member 30 has, on a first side of the pivot 31, an arm 44 provided with a notch 45 by which it is able to engage with said retaining member 33;
  • the buttonhole 43 of the sector 32 constituting the operating member comprises, at its end, a notch 46 in which the lug constituting the retaining member 33 can also engage.
  • the hooking member 30 On the other side of the pivot 31, the hooking member 30 has an arm 47, which is bent, and the end of which is opposite an extension 48 of the movable core 25; on this arm 47 of the hooking member 30 is engaged a frame 49 which, in the middle part of its longitudinal edges, is provided laterally projecting with lugs 50 by which it is pivotally mounted in housings provided for this effect in the housing 10, and whose transverse edges extend, one facing said arm 47 of the fastening member 30, the other facing the free end 20 of the bimetallic strip 18.
  • a stirrup 51 On the bent arm 47 of the hooking member 30, is also engaged a stirrup 51, the median crosspiece of which extends substantially in line with the articulation pivot 31, and the two wings of which are integral with a hub 52; the ends of this hub 52 are, in the manner of journals, rotatably mounted in holes, which are provided for this purpose in the housing 10, and which open to the outside, so that said hub constitutes a drive shaft through which the circuit breaker can, using spacers coupling not shown, be linked to a neighboring circuit breaker, or another module of this type, fitted with a similar drive shaft.
  • the hub 52 has a protruding finger 54 radially, and, jointly, facing this finger, the bent arm 47 of the hooking member 30 has a protruding lug 55.
  • the movable contact 16 carries a drive shoulder, on which can carry, for its drive, a shoulder provided for this purpose on the attachment member 30.
  • the drive shoulder of the movable contact 16 is formed by the crosspiece 56 constituting the transverse edge of its recess 34 opposite the fixed contact 15A, that is to say say the farthest from the latter, this crosspiece 56 is offset transversely with respect to the current part of the movable contact 16, by forming for example, and as shown, an end folded at right angles thereto, and the corresponding shoulder 58 of the fastening member 30 is formed on the tab 55 which laterally projecting from this fastening member.
  • the attachment member 30 is, according to the invention, free to move in the housing 10, no fixed stop being provided in the latter on the path which it sweeps when the movable contact 16 opens.
  • This opening is for example caused by a short circuit on the line concerned, causing the moving core 25 to come into action, which, acting on the arm 47 of the fastening member 30, causes a rotation thereof around the pivot 31
  • the shoulder 58 of the hooking member 30 has come to bear against the shoulder 56 of the movable contact 16, so that, as soon as it is released, the latter is subjected, d on the one hand, to the drive effects due to the spring 37, as described above, and on the other hand, to a tear-off effect corresponding to the rotation which, due to and transmitted from the movable core 25 ci in movable contact 16 by the fastening member 30, tends to rotate this movable contact 16, according to arrow Fl in FIG. 3.
  • the movable contact 16 reaches its triggered opening position, FIG. 4, and jointly, under the stress of its spring 29, the engagement and trigger lever 26 also reaches its triggering position shown on this Figure, the retaining member 33, previously released, having escaped the notch 46 of the buttonhole 43.
  • the latching member 30 acts on the cross member of the stirrup 51, which causes the rotation of the transmission shaft that constitutes the hub 52, according to arrow F2 in the figure. 4.
  • the torsion spring 37 has its central torsion part 38 engaged on a fixed boss 53 of the associated housing, while that 41 of its branches which acts on the fixed contact 16, hereinafter called the action branch, jointly constitutes a bending spring, and is for this purpose engaged, in its middle part , with a support lug 59.
  • this support lug 59 is carried by the movable contact 16 and, the latter having the general configuration of a U-shaped part, constitutes a crosspiece connecting one to the other the two flanges 60 of this piece.
  • the branch 41 of the torsion spring 37 passes above this cross-member 59, and below the middle part 61 of the movable contact 16 connecting the flanges 60 thereof to one another to one of their ends.
  • the support lug 59 jointly constitutes the drive shoulder of the movable contact 16, the latching member 30 having, facing this support lug 59, a notch , by which it can engage therewith, and thus forming the corresponding shoulder 58.
  • the branch 41 of the spring 37 is bent, or, in other words, has an arrow, its free end being in abutment against the movable contact 16, and, through it , against the fixed contact 15A, on a first side, while its middle part is, on the other side, in abutment against the support lug 59 of this movable contact 16.
  • the spring 37 acts on the lug 59 in a direction which is the same as that in which it also acts, according to a process analogous to that described above, when the movable contact 16 is opened. hooking member 30.
  • the latching member 30 in its rotation, comes, through its shoulder 58, in engagement with the lug 59, and, driving the latter, causes the cancellation of the bending of branch 41 of spring 37, FIG. 7, and this spring 37 therefore does not oppose any opposing force against the tearing-off force induced directly on the movable contact 16 by the attachment member 30.
  • This pulling force therefore adds its effects to the driving force due moreover to the central torsional part 38 of the spring 37.
  • the support lug 59 forms an independent part, movably mounted in guide grooves 63 of the associated housing, and the attachment member 30 comprises, for temporary support retractable from this support lug 59, a second shoulder 64.
  • drive shoulder 58 By its first shoulder 58, it is, as previously, able to act on a drive shoulder provided for this purpose on the movable contact 16, drive shoulder which, in the embodiment shown, is constituted by a lug 65 projecting from this movable contact 16.
  • the action branch 41 of the torsion spring 37 which, as before, constitutes a bending spring, is, by a return 70 from its free end, engaged in a groove 71 of the mobile contact 16.
  • the interlocking and tripping lever which is shown diagrammatically in fine lines in the figures, under the general reference 126, is different from that implemented previously: it has the shape of a yoke, of which the middle part, which is external, forms the gripping means available to the user, and the branches of which, which are internal and frame the hooking mechanism, each carry at their free end a pin 128.
  • a bulge 132 of these branches forms the operating member linked to such a lever, this bulge comprising a shoulder 146 for cooperation with the retaining member by which the latching member 30 is likely to come engaged with this controller.
  • this retaining member is constituted by the pivot 31 by which the movable contact 16 is articulated to the attachment member 30.
  • the attachment member 30 first rotates around the pivot 31, the latter being momentarily retained by the engagement and trigger lever 126, and this rotation of the member hooking 30 causes the release of the support lug 59, the shoulder 64 of the hooking member 30 escaping therefrom; due to the resulting retraction for the support lug 59, the bending of the action branch 41 of the spring 37 is canceled.
  • the latching member 30 causes, as before, the rotational drive of this movable contact 16 .
  • the movable contact 16 is subjected to the opening only to the effects of the spring 37 which are applied to it by the end of the branch 41 thereof, excluding effects of this spring which were previously applied to it via the support lug 59.
  • the attachment mechanism is, as described in the French patent No. 75 34575 mentioned above, of the type comprising a member retainer mounted movable in grooves of the housing, it could just as easily be of another type, and for example of the type of latching mechanism with free rolling element described in the French patent application registered on March 22, 1978 under No. 78 08263, in which the retaining element is a free rolling element.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP79400576A 1978-08-25 1979-08-16 Selbstschalter mit beweglichem, auf einem beweglichen Rastelement schwenkbar gelagertem, Kontakthebel Ceased EP0008558A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7824657A FR2434473A1 (fr) 1978-08-25 1978-08-25 Disjoncteur a contact mobile articule par pivot a un organe d'accrochage lui-meme mobile
FR7824657 1978-08-25

Publications (1)

Publication Number Publication Date
EP0008558A1 true EP0008558A1 (de) 1980-03-05

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ID=9212076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400576A Ceased EP0008558A1 (de) 1978-08-25 1979-08-16 Selbstschalter mit beweglichem, auf einem beweglichen Rastelement schwenkbar gelagertem, Kontakthebel

Country Status (2)

Country Link
EP (1) EP0008558A1 (de)
FR (1) FR2434473A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577712A1 (fr) * 1985-02-14 1986-08-22 Telemecanique Electrique Interrupteur de protection
EP0335774A1 (de) * 1988-03-30 1989-10-04 Hager Electro S.A. Auslösemagnet für einen Leistungsschalter
FR2646015A1 (fr) * 1989-04-18 1990-10-19 Gec Unelec Disjoncteur electrique
EP0444010A2 (de) * 1990-02-19 1991-08-28 Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Schaltschloss für einen Fehlerstromschutzschalter
EP0515292A1 (de) * 1991-05-21 1992-11-25 Schneider Electric Sa Elektromagnetischer Auslöser für einen Schwachstromschalter
EP0986083A2 (de) * 1998-09-08 2000-03-15 GEWISS S.p.A. Thermomagnetischer Schutzschalter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962941A (de) * 1947-12-09 1950-06-23
DE1906369A1 (de) * 1969-02-08 1970-09-03 Bbc Brown Boveri & Cie Strombegrenzender Schalter mit Schlaganker
DE2124353A1 (de) * 1971-05-17 1972-11-30 Geyer Fa Christian Mechanismus für Selbstschalter
FR2331879A1 (fr) * 1975-11-13 1977-06-10 Legrand Sa Disjoncteur, en particulier disjoncteur multipolaire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962941A (de) * 1947-12-09 1950-06-23
DE1906369A1 (de) * 1969-02-08 1970-09-03 Bbc Brown Boveri & Cie Strombegrenzender Schalter mit Schlaganker
DE2124353A1 (de) * 1971-05-17 1972-11-30 Geyer Fa Christian Mechanismus für Selbstschalter
FR2331879A1 (fr) * 1975-11-13 1977-06-10 Legrand Sa Disjoncteur, en particulier disjoncteur multipolaire

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577712A1 (fr) * 1985-02-14 1986-08-22 Telemecanique Electrique Interrupteur de protection
EP0193440A1 (de) * 1985-02-14 1986-09-03 Telemecanique Schutzschalter
EP0335774A1 (de) * 1988-03-30 1989-10-04 Hager Electro S.A. Auslösemagnet für einen Leistungsschalter
FR2629633A1 (fr) * 1988-03-30 1989-10-06 Hager Electro Declencheur magnetique pour disjoncteur
FR2646015A1 (fr) * 1989-04-18 1990-10-19 Gec Unelec Disjoncteur electrique
EP0393566A1 (de) * 1989-04-18 1990-10-24 G.E.C. Unelec Elektrischer Schutzschalter
EP0444010A2 (de) * 1990-02-19 1991-08-28 Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Schaltschloss für einen Fehlerstromschutzschalter
EP0444010A3 (en) * 1990-02-19 1992-05-13 Felten & Guilleaume Ag Oester Switch latch for fault-current protective switch
TR25103A (tr) * 1990-02-19 1992-11-01 Felten & Guilleaume Ag Oester Bir hatali akim emniyet salterine mahsus devre kilidi
AU636708B2 (en) * 1990-02-19 1993-05-06 Felten & Guilleaume Fabrik Elektrischer Apparate Aktiengesellschaft Switch lock for a fault current circuit breaker
EP0515292A1 (de) * 1991-05-21 1992-11-25 Schneider Electric Sa Elektromagnetischer Auslöser für einen Schwachstromschalter
FR2676860A1 (fr) * 1991-05-21 1992-11-27 Merlin Gerin Declencheur electromagnetique pour un disjoncteur electrique a bas calibres.
EP0986083A2 (de) * 1998-09-08 2000-03-15 GEWISS S.p.A. Thermomagnetischer Schutzschalter
EP0986083A3 (de) * 1998-09-08 2000-08-09 GEWISS S.p.A. Thermomagnetischer Schutzschalter

Also Published As

Publication number Publication date
FR2434473A1 (fr) 1980-03-21
FR2434473B1 (de) 1981-07-17

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