EP0327460A1 - Elektrischer Schalter mit automatischer Ausschaltung, insbesondere Differentialschutz - Google Patents

Elektrischer Schalter mit automatischer Ausschaltung, insbesondere Differentialschutz Download PDF

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Publication number
EP0327460A1
EP0327460A1 EP89400294A EP89400294A EP0327460A1 EP 0327460 A1 EP0327460 A1 EP 0327460A1 EP 89400294 A EP89400294 A EP 89400294A EP 89400294 A EP89400294 A EP 89400294A EP 0327460 A1 EP0327460 A1 EP 0327460A1
Authority
EP
European Patent Office
Prior art keywords
cam
contact
housing
electric switch
pawl
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Withdrawn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
EP89400294A
Other languages
English (en)
French (fr)
Inventor
Georges Urbain
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 EP0327460A1 publication Critical patent/EP0327460A1/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Withdrawn legal-status Critical Current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
    • H01H71/50—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
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/635—Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms

Definitions

  • the present invention relates generally to electrical switches with automatic cut-off, that is to say electrical switches in which, on manual intervention by an operator, the opening of the contacts and their closing develop according to a process which, once initiated by such an operator, escapes the action of this one and no longer depends on him, the opening of the contacts being able moreover to intervene systematically on the intervention of any detection organ, such as this is for example the case in differential switches, that is to say in switches comprising, as detection member, a relay sensitive to a possible differential current.
  • the present invention relates to electrical switches of the kind comprising, in a housing, between a control lever rotatably mounted relative to said housing and a contact support which, also mounted rotatably relative to said housing, carries at least a contact, a mechanism with abrupt triggering capable of causing the automatic pivoting of said contact support between a closed position, for which it applies, against a fixed contact, the contact which it carries, commonly called movable contact, and a position of opening for which it maintains this movable contact away from the fixed contact.
  • this abruptly triggering mechanism is a mechanism with passing neutral, an axis belonging to one of its constituents being suddenly removed from the alignment of two others when it is forced to reach and cross that line.
  • the electric switches with automatic cut-off implementing such a mechanism with sudden release have given and still give satisfaction, at least at the opening.
  • a cam is used, which, coaxial with the control handle, is mounted freely rotatable relative to the latter, with pawls specific to its drive and to its retention.
  • the present invention generally relates to a provision ensuring a sudden release on closure, thereby allowing to dominate satisfactorily such closure, and further leading to other advantages.
  • an electric switch with automatic cut-off of the kind comprising, in a housing, between a control lever mounted rotatably with respect to said housing and a contact support, which, too, mounted rotatably with respect to said housing , carries at least one contact, a mechanism with abrupt triggering capable of causing the automatic pivoting of said contact support between a closed position, for which it applies against a fixed contact the contact which it carries, commonly called movable contact, and a open position for which it maintains this movable contact away from the fixed contact, said sudden release mechanism being under the control of a cam which, coaxial with the control handle, is freely rotatable relative to the latter, with , associated with said cam, on the one hand, a first pawl, hereinafter called movable pawl, which, rotatably mounted on the control handle, is able to cooperate with a first notch of the cam, for driving it in one direction, and, on the other hand, a second pawl, hereinafter said fixed
  • the electric switch with automatic cut-off is of the type comprising, in a housing 10, between a control handle 11 rotatably mounted relative to said housing 10 and a contact support 12 which, also mounted rotatably with respect to said housing 10, carries at least one contact 13, a snap mechanism 14 capable of causing the automatic pivoting of said contact support 12 between a closed position, FIG. 4, for which it applies against a fixed contact 15, the contact 13 which it carries, hereinafter called mobile contact, and an open position, FIGS. 1 to 3, for which it maintains this mobile contact 13 away from said fixed contact 15, and vice versa.
  • a bipolar electric switch there are, each associated respectively with two fixed contacts 15, two movable contacts 13.
  • the contact support 12 in this embodiment is split into two separate parts.
  • this reference 12 indifferently designates sometimes only one of the parts in question, and sometimes all of them.
  • each of the contact couples formed by a fixed contact 15 and the corresponding movable contact 13 is interposed, independently of the other, between an input terminal 16A and an output terminal 16B, FIG. 1.
  • each of the input 16A and output 16B terminals thus implemented comprises, on the one hand, a tongue 17, which, for an input terminal 16A, is in continuity with the fixed contact 15 corresponding and which, for an output terminal 16B, is electrically connected with the corresponding movable contact 13, for example by a braid, not visible in the figures, on which is, for example, positioned the associated measuring torus, and, on the other hand, for clamping an electrical conductor on this tongue 17, a clamp 18 with clamping screw 19.
  • this housing 10 there is associated, with this housing 10, at least one flange 20 which, in addition to the control lever 11 and the contact support 12, carries all of the components of the snap-action mechanism 14, and which is adapted to be attached to the housing 10 and to be suitably secured thereto.
  • two flanges 20 are provided, each being respectively disposed on either side of all of the constituents concerned.
  • the snap-action mechanism 14 is under the control of a cam 25 which, coaxial with the control handle 11, is freely rotatable relative to the latter, with, associated with said cam 25, of a part, a first pawl 26, here called movable pawl, which, rotatably mounted on the control handle 11, is adapted, by a spout 27, to cooperate with a first notch 28 of the cam 25, for driving it ci, in a direction, along arrow F1 of FIG.
  • a cam 25 which, coaxial with the control handle 11, is freely rotatable relative to the latter, with, associated with said cam 25, of a part, a first pawl 26, here called movable pawl, which, rotatably mounted on the control handle 11, is adapted, by a spout 27, to cooperate with a first notch 28 of the cam 25, for driving it ci, in a direction, along arrow F1 of FIG.
  • a second pawl 30, here called a fixed pawl which, mounted rotatably relative to the flanges 20, and therefore relative to the housing 10, is capable, by a notch 31, of cooperating with a second notch 32 of the cam 25, for retaining the latter in the opposite direction to the previous one.
  • the cam 25 extends, overall, entirely within the overall contour of the control handle 11.
  • first notch 28 is formed by means of a projecting spout 34, and, likewise, its second notch 32, which is disposed in a generally diametrically opposite position relative to the previous one, is formed by a projecting spout 35 .
  • this second notch 32 is in continuity with one of the flanks of a re-entrant dihedral 36 affecting in hollow the edge of this cam 25.
  • the cam 25 thus formed is in practice split into two parts, which, engaged in rotation on the same axis 22 as the control lever 11, are each respectively attached to the two sides of the latter this.
  • the movable pawl 26 and the fixed pawl 30 are generally disposed in generally opposite positions relative to each other on either side of the cam 25, and therefore on either side of the control lever 11 .
  • the movable pawl 26, which is constituted by a single piece, is in the general form of a yoke, having, on the one hand, two arms 37, by which it is articulated, by an axis 38, on a boss 39 provided radially projecting for this purpose on the control lever 11, and the ends of which, for cooperation with the two constituent parts of the cam 25, each form a spout 27, and, on the other hand, connecting these arms 37 to their base, a cross 40.
  • this cross member 40 has, on the side of the control lever 11, projecting in the direction of the latter, a finger 41, and, on the opposite side, a boss 42.
  • the movable pawl 26 thus formed and the control handle 11 have in common elastic return means, which, bearing on a flange 20, jointly urge the control handle 11 towards its open position and the movable pawl 26 in the direction of the cam 25.
  • these elastic return means consist of a torsion spring 43, the central torsion part 44 of which is engaged on a cylindrical boss 45 of the control lever 11, and one of which, 46, of the branches, bears on a pin 47 provided projecting for this purpose on a flange 20 while the other, 48, bears on the finger 41 of the movable pawl 26.
  • the fixed pawl 30 is constituted by a single piece.
  • the ramp 53 of the cam 25 is formed by that of the sides of its re-entering dihedral 36 which is opposite to its notch 32, and the arm 54 of the fixed pawl 30 extends from its cross 49 , substantially perpendicular to its uprights 52.
  • the fixed pawl 30 is associated with elastic return means which urge it to pivot in the opposite direction to the previous one, that is to say in the opposite direction to that for which it is able to engage with the corresponding notch 32 of cam 25.
  • these elastic return means comprise a torsion spring 55, the central torsion part 56 of which is engaged on a smaller diameter extension 57 of the boss cylindrical 51 corresponding to the flange 20 concerned and one of which, 58, of the branches bears on a pin 59 provided for projecting for this purpose on this flange 20 while the other, 60, relates to a lug 61 also provided laterally projecting at this effect on that of the uprights 52 of this fixed pawl 30 which is close to this flange 20.
  • a locking lever 62 which, rotatably mounted relative to the flanges 20, and therefore relative to the housing 10, is able, by a spoiler 63, to hold said fixed pawl 30 in engagement with the notch 32 corresponding to the cam 25, carrying, then, simply by its free end, and as shown in FIG. 4, on the crosspiece 64 of this fixed pawl 30 opposite to that, 49, from which extends its arm 54.
  • this locking lever 62 is rotatably engaged on a fixed axis 65 engaged with a cylindrical boss 66 of one of the flanges 20, and it is associated with elastic return means which permanently urge its spoiler 63 towards of the cross member 64 of the fixed pawl 30.
  • these elastic return means consist of a torsion spring 67, the central torsion part 68 of which is engaged on the corresponding cylindrical boss 66 of the flange 20 concerned, and one of which, 69, of the branches is supported on a pin 70 provided projecting for this purpose on this flange 20 while the other, 71, relates to a lug 72 also provided laterally projecting for this purpose on the locking lever 62.
  • the locking lever 62 is also associated with an unlocking lever 73, which, rotatably mounted relative to the flanges 20, and therefore relative to the housing 10, being, in practice, engaged in rotation, for this purpose, on the axis 22 of the control lever 11, comprises, on the one hand, at the end of a finger 74, a boss 75, by which it interferes with the path of a boss 76 which, for him, has radially projecting, the control lever 11, and, on the other hand, a lug 77 by which, after bypassing the locking lever 62, it is able to act on this locking lever 62.
  • this unlocking lever 73 is extended by an arm 78 on the other side of the axis 22 of the control lever 11.
  • a differential switch that is to say a switch comprising a relay 79 sensitive to a differential current
  • the striker 80 of this sensitive relay 79 is able to act on the lever locking 62 by means of a reset lever 81 rotatably mounted relative to the flanges 20, and therefore relative to the housing 10.
  • this reset lever 81 is rotatably engaged on the axis 65 of the locking lever 62, the latter forming a yoke between the arms of which it extends, and it comprises, with firstly, a rigid arm 82, by which it is capable of acting on the striker 80 of the sensitive relay 79, and by means of which said striker 80 is capable of acting on said locking lever 62, and, secondly, an elastically deformable arm 83 on which the fixed pawl 30 carries.
  • this elastically deformable arm 83 itself comprises a rigid U-shaped part 84 of which the rigid arm 82 is integral, and a butt-shaped spring 85 which, by its base, is engaged with the part rigid 84, and which, by its free end, bears on the crosspiece 64 of the fixed pawl 30.
  • the snap-action mechanism 14 also includes a slide 87, which, mounted movable in translation relative to the flanges 20, and therefore relative to the housing 10, engages, by a finger 88, with the cam 25, a lever attachment 89, which, rotatably mounted relative to the flanges 20, and therefore relative to the housing 10, has, on the one hand, a notch 90, by which it is capable of being hooked on a notch 91 of the contact support 12, for retaining the latter, and, on the other hand, a ramp 92, by which, for its pivoting, and thus the release of said contact support 12, it interferes with the path of a pin 93 secured to the slide 87 , and, as explained later, elastic contact pressure means capable of acting in closing on the contact support 12 while in practice bearing on said slide 87.
  • the slide 87 which, like the contact support 12 and the cam 25, is split into two pieces each arranged respectively on either side of the control lever 11, while the lever d hooking 89 forms a single piece, comprises, overall, two angled branches, namely, a branch 94, which carries its finger 88, and a branch 95 at the end of which it has a transversely projecting finger 96 by which it is able to act on the corresponding movable contact 13 for driving the opening thereof, while the pin 93 which it carries extends substantially in its elbow region, at the intersection of its branches 94 and 95.
  • the slide 87 thus formed is associated with elastic return means which permanently urge it to open.
  • these elastic return means consist of a torsion spring 97, the central torsion part 98 of which is engaged on a cylindrical boss 99 of a flanges 20, and one of which, 100, of branches, bears on the cylindrical boss 101 of this flange 20 around which the control lever 11 pivots while the other, 102, bears on a shoulder 103 provided, laterally, in oblique, for this purpose, on the internal flank of the branch 95 of the slide 87.
  • the cam 25 has, angularly halfway between its notches 28 and 32, a recess 104, and, for example, and as shown, a notch, which extends substantially radially, and in which said finger 88 is engaged.
  • this finger 88 passes right through the slider 87, and, as shown diagrammatically in broken lines in FIGS. 1 and 2, it thus participates in the sliding guide of the latter, in being for this purpose engaged with a groove 105 of the flange 20 close.
  • the attachment lever 89 which forms a single piece, is, in the embodiment shown, in the form of a yoke, which, by its median zone, intermediate between its notch 90 and its ramp 92, is engaged rotating on a fixed axis 107 engaged with a cylindrical boss 108 of the flange 20, and at the end of each of the two branches of which is provided such a notch 90, for cooperation, each respectively, with the two component parts of the contact support 12.
  • the hooking lever 89 thus formed is associated with elastic return means which permanently urge it in the direction of the corresponding notch 91 of this contact support 12.
  • these elastic return means consist of a torsion spring 109, the central torsion part 110 of which is engaged on a cylindrical boss 108 of the lever d attachment 89 and of which one, 111, of the branches, is supported on a pin 112 provided for projecting for this purpose on the flange 20 close while the other, 113, relates to a lug 114 also provided laterally projecting for this purpose on the attachment lever 89, on the side of its ramp 92.
  • the contact support 12 is rotatably engaged on a fixed axis 115 engaged with a cylindrical boss 116 of at least one flanges 20.
  • the movable contacts 13, which surround it, are attached to it laterally, for example by crimping.
  • the contact support 12 is able, by an appendix 117, to cooperate with the boss 42 of the movable pawl 26, first in thrust, for the escape of this movable pawl 26 relative to the notch 28 of the control lever 11, then in support, for the retention in the closed position thereof.
  • a position indicator 120 which, rotatably mounted relative to the flanges 20, and therefore relative to the housing 10 , being engaged for this purpose in rotation on a fixed axis 121 carried by the flange 20, has, radially, in hollow, a notch 122 with which is engaged said finger 119, and which is thus capable of occupying, level with the front wall of the housing 10, one or the other of two distinct positions, one opening, FIGS. 1 to 3, the other closing, FIG. 6.
  • the elastic contact pressure means interposed between the slider 87 and the contact support 12 are constituted, in the embodiment shown, by a torsion spring 124 of which the central torsion part 125 is engaged on the cylindrical boss 116 of the flange 20 concerned, and one of which, 126, of the branches bears on a boss 127 provided laterally for this purpose projecting from the external flank of the branch 95 of the slide 87 while the other, 128, bears on a lug 129 also provided laterally projecting for this purpose on the contact support 12.
  • torsion springs 124 there are thus two torsion springs 124, one per component constituting the contact support 12 and per component constituting the slide 87.
  • the movable contacts 13 are therefore thus kept apart from the fixed contacts 15.
  • the fixed pawl 30 is out of service, its notch 31 being at a distance from the notch 32 of the cam 25, while the end of its arm 54 is in the vicinity immediately from the base of ramp 53 of the latter and that its crosspiece 64 extends to the root of the spoiler 63 of the locking lever 62.
  • the locking lever 62 Under the stress of the spring 67 constituting its elastic return means, the locking lever 62, for its part, is in abutment against the lug 77 of the unlocking lever 73, and, the latter being jointly in abutment, by its boss 75, against the boss 76 of the control lever 11, under the stress of the same spring 67, the screw 86 carried by the locking lever 62 is spaced from the arm 82 of the reset lever 81, however, the latter , under the bias of the spring 55 constituting the elastic return means of the fixed pawl 30, and by means of the latter, is applied against the striker 80 of the sensitive relay 79.
  • the cam 25 causes, by its ramp 53, a pivoting, along the arrow F2 of FIGS. 2 and 4, of the fixed pawl 30, this ramp 53 coming to bear against the end of the arm 54 of this fixed pawl 30, and, because of its obliquity, then constraining this arm 54, and therefore the fixed pawl 30, to follow it.
  • the locking lever 62 pivots about the axis 65, along the arrow F5 in FIG. 5, which leads it to be carried, by the screw 86 that it carries, on the arm 82 of the reset lever 81, itself in contact with the striker 80 of the sensitive relay 79.
  • This cam 25 being thus released, it is the object, under the stress of the spring 43 constituting its elastic return means, these intervening by by means of the movable pawl 26, in a retrograde movement around the axis 22, along arrow F8 in FIG. 6, which leads it to engage, by its notch 32, with the notch 31 of the fixed pawl 30, however, that the latter, under the bias of the spring 55 constituting its elastic return means, comes into abutment, by its crosspiece 64 against the spoiler 63 of the locking lever 62.
  • the unlocking lever 73 causes the breaking of the attachment previously established between the spoiler 63 of this locking lever 62 and the crosspiece 64 of the fixed pawl 30, so that , the latter returning to the open position under the bias of the spring 55 constituting its elastic return means, by pivoting, along the arrow F10 of FIG. 6, around the axis 50, it releases the cam 25 and therefore the slide 87 which meshes with it.
  • the slider 87 Under the stress of the spring 97 constituting its elastic return means, the slider 87, thus released, suddenly returns to the retracted open position, which, on the one hand, by its finger 96, also suddenly returns to the open position the movable contact 13, and therefore the contact support 12 carrying the latter, with, at the end of its travel, a new picking of this contact support 12 on the latching lever 89, the latter being urged accordingly by the spring 109 constituting its elastic return means as soon as the pin 93 of the slide 87 has abandoned its ramp 92, and which, on the other hand, by its finger 88, also causes the return of the cam 25 to the open position , with, at the end of the travel, a new hooking, on the latter, of the movable pawl 26.
  • the elastically deformable arm 83 of the rearming lever 81 which, during closing, has enabled, by means of the fixed pawl 30, and under the bias of the spring 55 constituting the elastic return means associated with this fixed pawl 30 , the resetting of the striker 80 of the sensitive relay 79, advantageously absorbs, during an opening, part of the shock energy developed, thus providing for the sensitive relay 79.
  • the various constituents of the electric switch with automatic cut-off according to the invention can advantageously be made of synthetic material, which contributes to the insulation of the together.
  • the flanges 20 used in the embodiment shown carry all of the movable members internal to the housing 10, as well, moreover, as the sensitive relay 79, which, during assembly, advantageously makes it possible to report, first, on these support flanges 20, the various members concerned, and, then, after the necessary adjustments, to place everything in this housing 10, only the input and output and the fixed contact being directly attached to it.

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EP89400294A 1988-02-03 1989-02-02 Elektrischer Schalter mit automatischer Ausschaltung, insbesondere Differentialschutz Withdrawn EP0327460A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801242A FR2626712B1 (fr) 1988-02-03 1988-02-03 Interrupteur electrique a coupure automatique, en particulier interrupteur differentiel
FR8801242 1988-02-03

Publications (1)

Publication Number Publication Date
EP0327460A1 true EP0327460A1 (de) 1989-08-09

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Application Number Title Priority Date Filing Date
EP89400294A Withdrawn EP0327460A1 (de) 1988-02-03 1989-02-02 Elektrischer Schalter mit automatischer Ausschaltung, insbesondere Differentialschutz

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EP (1) EP0327460A1 (de)
FR (1) FR2626712B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686453A1 (fr) * 1992-01-17 1993-07-23 Legrand Sa Interrupteur differentiel.
EP2485237A1 (de) * 2011-02-08 2012-08-08 Siemens Aktiengesellschaft Fehlerstromschutzschalter
CN109755774A (zh) * 2019-03-11 2019-05-14 北京铁道工程机电技术研究所股份有限公司 一种电动接地装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB154022A (en) * 1919-09-19 1920-11-25 Crompton & Co Ltd Improvements in or relating to electric switches
GB233094A (en) * 1924-03-10 1925-05-07 Albert Browne Mudie Improvements in electric switches
DE656585C (de) * 1933-07-05 1938-02-09 Stotz Kontakt Gmbh Vorrichtung zur Momenteinschaltung von elektrischen Selbstschaltern
DE1210069B (de) * 1962-10-19 1966-02-03 Standard Elektrik Lorenz Ag Momentschalter fuer die Betaetigung durch den Skalenschnurlauf von motorisch betriebenen Sendersucheinrichtungen in Fernseh- und Rundfunkgeraeten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB154022A (en) * 1919-09-19 1920-11-25 Crompton & Co Ltd Improvements in or relating to electric switches
GB233094A (en) * 1924-03-10 1925-05-07 Albert Browne Mudie Improvements in electric switches
DE656585C (de) * 1933-07-05 1938-02-09 Stotz Kontakt Gmbh Vorrichtung zur Momenteinschaltung von elektrischen Selbstschaltern
DE1210069B (de) * 1962-10-19 1966-02-03 Standard Elektrik Lorenz Ag Momentschalter fuer die Betaetigung durch den Skalenschnurlauf von motorisch betriebenen Sendersucheinrichtungen in Fernseh- und Rundfunkgeraeten

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686453A1 (fr) * 1992-01-17 1993-07-23 Legrand Sa Interrupteur differentiel.
EP2485237A1 (de) * 2011-02-08 2012-08-08 Siemens Aktiengesellschaft Fehlerstromschutzschalter
CN109755774A (zh) * 2019-03-11 2019-05-14 北京铁道工程机电技术研究所股份有限公司 一种电动接地装置

Also Published As

Publication number Publication date
FR2626712B1 (fr) 1995-06-23
FR2626712A1 (fr) 1989-08-04

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