EP0004508B1 - Disjoncteur ayant un organe d'accrochage mobile soumis à des moyens élastiques de rappel - Google Patents

Disjoncteur ayant un organe d'accrochage mobile soumis à des moyens élastiques de rappel Download PDF

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Publication number
EP0004508B1
EP0004508B1 EP19790400179 EP79400179A EP0004508B1 EP 0004508 B1 EP0004508 B1 EP 0004508B1 EP 19790400179 EP19790400179 EP 19790400179 EP 79400179 A EP79400179 A EP 79400179A EP 0004508 B1 EP0004508 B1 EP 0004508B1
Authority
EP
European Patent Office
Prior art keywords
circuit
movable contact
engaged
spring
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.)
Expired
Application number
EP19790400179
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0004508A2 (fr
EP0004508A3 (en
Inventor
Norbert Signorelli
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 EP0004508A2 publication Critical patent/EP0004508A2/fr
Publication of EP0004508A3 publication Critical patent/EP0004508A3/xx
Application granted granted Critical
Publication of EP0004508B1 publication Critical patent/EP0004508B1/fr
Expired 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
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1027—Interconnected mechanisms comprising a bidirectional connecting member actuated by the opening movement of one pole to trip a neighbour pole
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • 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
    • H01H71/505—Latching devices between operating and release mechanism
    • H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device

Definitions

  • the present invention relates generally to circuit breakers which comprise, in a case, a first contact, which is fixed, a second contact, which is movable between an engaged or closed position and a tripped or open position, and which is biased towards its position triggered by elastic opening means, any trigger, magnetic and / or thermal, which is capable of causing the release of said movable contact, and therefore the passage of the latter from its engaged position in its triggered position, an engagement or closure and trigger or opening handle, which is movably mounted between an engagement position and a trigger position, and a latching mechanism, which is established between said member trigger and said engagement lever; it relates more particularly to the case where this latching mechanism comprises a movable latching member subjected on the one hand to the triggering member and on the other hand to elastic return means urging it permanently towards a reset position for which, after opening, the circuit breaker can, by operating the engagement and release lever, be returned to the engaged position.
  • the same spring forms, by a branch, elastic opening means for the movable contact and, by another branch, elastic return means for a fastening member, from which the previous deviates for ensure the opening of the movable contact, that is to say the passage of the latter in the tripped position.
  • the present invention generally relates to an improvement in circuit breakers of the type concerned, such as to reduce the number of component parts thereof, and therefore to lower the cost and improve the yield.
  • the elastic return means of the fastening member and the elastic means for opening the movable contact are constituted by the same spring which comprises, on the one hand, a body consisting of a helical spring, which is coupled at one of its ends to a fixed point of the housing and which is coupled to the other of its ends in movable contact, and, on the other hand, in continuity with said body, to said other end of it ci, an elastic branch forming a bending spring, which bears on the latching member, in such a way that, in addition to the opening functions of movable contact and return of the latching member, said spring is suitable for also perform the closing function of said movable contact.
  • the same spring economically performs a multiplicity of functions, namely opening the movable contact, resetting the latching member, closing the movable contact, its travel contact penetration of the fixed contact, and the resulting contact pressure.
  • Such a circuit breaker generally comprises a box 10.
  • Such a housing can be formed of two shells suitably facing each other, and suitably linked to each other by screws or rivets 11, as shown; in practice, the corresponding holes of the shells are grouped in pairs, one serving to assemble them into a unipolar, the other serving to assemble them into a multipolar.
  • the housing 10 can moreover constitute on the one hand a deep functional base, containing most of the components of the circuit breaker, and on the other hand a semi-functional cover attached to this base and covering the others of said components.
  • the housing 10 forms, at its lower part, a fixing sole 12 adapted, in cooperation with an elastic claw 13, to allow fixing on a rail of the type said in cap 14, as shown diagrammatically in broken lines in FIG. 1.
  • the housing 10 laterally contains two connection terminals 15A, 15B; for convenience, terminal 15A will be referred to below as input terminal and terminal 15B as output terminal, without this implying a reserved direction of current flow; on the contrary, the circuit breaker according to the invention can indifferently be mounted in one direction or the other.
  • each of these terminals consists of a stirrup 16A, 16B, slidably engaged on a metal strip 17A, 17B belonging to the copperworker of the circuit breaker, and of a screw 18A, 18B engaged by screwing on said stirrup.
  • the housing 10 comprises on the one hand passages 20A, 20B for engagement of the strands of the cable to be protected, and on the other hand passages 21A, 21B, for access to the screws 18A, 18B.
  • it further comprises transversely passages 22A, 22B, and the stirrups 16A, 16B have corresponding passages 23A, 23B, to allow possible parallel wiring, from a cable of appropriate section, stripped or not, with the neighboring circuit breaker (s).
  • a breaking chamber 25 which, in the embodiment shown in FIGS. 1 to 7 , is fitted with extinguisher plates 26.
  • the strips 17A, 17B constitute two arcing horns 27A, 27B, the first of which, the horn 27A, also constitutes a fixed contact with which a movable contact 28 cooperates.
  • this movable contact 28 is cut from a plate, and it is articulated as a knife on a fixed edge 29 formed by the free edge of a tongue 30 from the strip 17B in favor of a puncture 31 formed for this purpose therein.
  • the movable contact 28 By rotation around the fixed edge 29, the movable contact 28 is capable of passing from an engaged position, FIG. 1, for which it is in abutment against the fixed contact 27A, to a tripped position, FIGS. 6 and 7, for which it is at a distance from this fixed contact 27A.
  • an engagement and trigger lever 33 is available to the user, on the front wall of the housing 10, through an opening 34 made for this purpose in this front wall, and a latching mechanism 35 is established between this latching and latching lever 33 and a latching member, detailed below, capable of causing the release of the movable contact 28.
  • such a hooking mechanism comprises a hooking member 36 directly subjected to the corresponding triggering member.
  • the latching mechanism 35 to which this latching member 36 belongs is a mechanism with a free rolling element 37.
  • the free rolling element 37 which it comprises forms an intermediate retaining element between the latching member 36 and an operating member 38 subjected to the latching and tripping lever 33.
  • the operating member 38 forms a slide, guided by rectilinear slides 39 formed for this purpose in the housing 10, and it is integral with the engagement and trigger lever 33, so that the latter thus also itself constitutes a slide with a straight stroke.
  • the operating member 38 is subjected to a spring 40, which bears on a fixed boss 41 of the housing 10, and which urges it in the direction opposite to the attachment member 36.
  • the free rolling element 37 is constituted by a ball, and this is disposed in a housing of the operating member 38 formed between a longitudinal bearing 42 and an elastically deformable tongue 43 of this one.
  • This free rolling element 37 cooperates with two other rolling elements, one linked to the latching member 36, the other linked to the operating member 38.
  • the operating member 38 it is two balls 45, arranged between the longitudinal bearing 42 and the elastically deformable tongue 43 of this operating member 38, of p 3 rt and other of the ball 37 constituting l 'free rolling element, in contact with a part of a first transverse bearing 46 which; being oblique, polarizes them in the direction of the longitudinal bearing 42, FIGS. 1 and 2, and on the other hand by two transverse bearing 47 formed on fingers 48 provided for this purpose projecting this longitudinal bearing 42, FIGS. 2 and 4.
  • the balls 45, the ball 37, and the roller 44 generally form an alignment in contact with the longitudinal surface 42 of the operating member 38, but, according to an arrangement described in detail in the French patent application No. 7803760 mentioned above. above, arrangements are made for this alignment to be "negative”: for example, and as shown in FIG. 2, the balls 45 have a diameter greater than that of the ball 37, and this ball 37 itself has a diameter greater than that of routine 44; as a variant, the ball and roller can have the same diameter, the "negative" drying alignment then being obtained by a transverse offset relative to each other of the bearing surfaces in contact with which these balls and this roller are in the engagement position shown in Figure 1.
  • housings 49 are provided in the housing 10, into which these balls can partially penetrate, FIG. 4.
  • the attachment member 36 forms a movable part having a generally U-shaped configuration, the roller 44 being established transversely between the ends of the wings of this part, from one of these wings to the other.
  • the attachment member 36 also has two abutment lugs 52, formed for example by local stamping of the wings of the U-piece which constitutes it, FIG. 5, and these abutment lugs are engaged with play in knobs 53 provided for this purpose in the housing.
  • parallel to the buttonholes 51 precedes .es, at a distance therefrom.
  • the hooking member 36 is subjected to at least one triggering member.
  • two triggering members are provided.
  • the first is an electromagnetic trip member, which comprises on the one hand a U-shaped piece 54, forming a cylinder head, engaged on the metal strip 17B, between the movable contact 28 and the terminal 15B, and, on the other hand, a piece in the form of a pallet 55, forming an armature, which is integral with the latching member 36, at the end thereof opposite the roller 44, and which, for the latching position shown in FIG. 1, s extends opposite the free ends of the wings of the U-shaped part forming a cylinder head 54.
  • the hooking member 36 is balanced around its transverse axis 50.
  • the cylinder head part 54 Transversally with respect to the metal strip 17B on which it is engaged, the cylinder head part 54 is mounted movable between two stops; in practice, and as it is better visible in FIG. 5, the wings of the U-shaped part which constitutes it carry laterally, at a distance from each other, two bosses or half-punctures 56, formed for example by stamping, and engaged in the fixed buttonholes 57 provided for this purpose in the housing 10, FIG. 1.
  • the part forming a cylinder head 54 can be subjected to a spring 58, which urges it in the direction of the hooking member 36, within the limits of its travel authorized by its bosses 56, which, for the latching position shown in FIG. 1, defines the necessary air gap between this part forming a cylinder head 54 and the part forming an armature 55 which is associated with it.
  • the second planned triggering member is thermal: it is a bimetallic strip 59 capable of acting on the hooking member 36.
  • the bimetallic strip 59 is carried by the operating member 38; it is therefore integral with the engagement and trigger lever 33.
  • lever 60 which is integral with the operating member 38, and came in one piece with it.
  • This lever 60 has, at its free end, a lug 61 which, through a notch 62 of the operating member 38, FIG. 2, is capable of acting on the roller 44 carried by the hooking member 36, and, in its central region, it has in the opposite direction to this lug 61, another lug 63 on which the bimetallic strip 59 can act by its free end.
  • the heating of the bimetallic strip 59 is provided by convection, by a calibrated conductor 64 belonging to the copperwork of the circuit breaker, and, in the embodiment shown on FIGS. 1 to 7, this calibrated conductor 64 is formed by a section of reduced section of the part of the arc horn 27A facing the bimetallic strip 59.
  • elastic opening means are associated with the movable contact 28, for biasing of the latter in the direction of its tripped position; and, as is also usual, elastic return means are associated with the hooking member 36, for biasing of the latter towards a reset position for which the roller 44 which it carries is at contact of the longitudinal surface 42 of the actuator 38, or, at least, in alignment with the latter.
  • the elastic return means thus associated with the attachment member 36 belong to the elastic opening means.
  • these elastic means are constituted jointly by the same spring 66, and the latter comprises, on the one hand, a body 67 consisting of a helical spring, which, at one of its ends is coupled at a point fixed, such as boss 68 of the housing 10, or, as a variant, an axis integral with the latter, and which, at its other end, is coupled to the movable contact 28, and, on the other hand, in continuity with said body 67 at said other end thereof, an elastic branch 65 forming a bending spring.
  • the body 67 of the spring 66 which, in the embodiment shown, is a traction body, is arranged in a housing 69 of the housing 10 formed on the other side of the metal strip 17B with respect to the movable contact 28 , and the elastic branch 65 of this spring 66 passes through this metal strip 17B in favor of the puncture 31 formed therein, as mentioned above.
  • the movable contact 28 For coupling to it the body 67 of the spring 66, the movable contact 28 includes a notch 81 in which is simply engaged a cross-member 82 by which the elastic branch 65 of the spring 66 is connected to said body 67 thereof, cross-member 82 which thus passes from one side to the other of the movable contact 28.
  • the spring 66 therefore ensures by its elastic bending branch 65, the proper maintenance of this abutment of the movable contact 28 against the fixed contact 27A; in addition, by its traction body 67, it jointly ensures the proper maintenance of the movable contact support 28 against its fixed pivoting edge 29.
  • the latching member 36 is therefore locked in the latching position by the ball 37, and the movable contact 28 maintained in the closed position against the fixed contact 27A.
  • the torque applied to it is advantageously substantially constant: indeed, although the force applied by the spring 66 on the movable contact 28 decreases during such an opening , however the corresponding lever arm increases.
  • the movable contact 28 has at its upper part a stop 70 suitable for limiting the opening stroke.
  • the operating member can therefore move in the direction indicated by the arrow F 1 in Figures 1, 2 and 4, carrying with it the balls 45, as well as the ball 37, up to 'to occupy the triggered position shown in Figure 7.
  • the balls 45 slightly repel the ball 37, and the latter is therefore subject to the elastically deformable tongue 43 of this operating member, which has the dual function of to avoid inadvertent ejection and to ensure, with a view to rearming the assembly, the negative alignment necessary for such rearming in contact with the longitudinal reach 42 provided for this purpose.
  • the stop lugs 52 of this hooking member 36 come at the end of the buttonholes 53 in which they are engaged, the length of the buttonholes 51 in which the transverse axis 50 of this member is engaged attachment 36 being made sufficient so that this transverse axis 50 does not come at the end of these buttonholes 51 before the stop lugs 52 are at the end of the buttonholes 53.
  • the latching member 36 is the subject to a tilting torque around the transverse axis 50, counterclockwise, as indicated by the arrow F2 in FIG. 7.
  • the operating member 38 pushes the attachment member 36 while maintaining the latter in the locked position, and this movement is continued until the balls 45, returned to their housings 49, ⁇ are, as before, forced to partially penetrate therein and therefore keep locked again in the engaged position the operating member 38 , against the elastic stress exerted by the elastic branch 65 on the attachment member 36.
  • the electromagnetic tripping device intervenes: the U-shaped piece 54 acting as a cylinder head attracts the pallet 55 acting as a movable frame, and, the latter being secured to the member attachment 36, this attachment member escapes from the ball 37, by rolling it, as before.
  • the mobility of the U-shaped part 54 allows systematic erasure under the thrust of the pallet 55, necessary for the pivoting of the hooking member 36.
  • the spring 58 possibly associated with the U-shaped piece 54 subsequently returns the latter to the initial position, although the progressive increase in current in the metal strip 17B is in practice sufficient for a systematic displacement of this U-shaped piece 54 in the direction of the pallet 55 before the current reaches the tripping value for which the hooking member 36 must escape from the ball 37.
  • the spring 58 is therefore not strictly necessary, and, at least for certain embodiments, can be eliminated.
  • the spout 72 of the movable contact 28 is of sufficient length to form for the latter a clean extension to constitute by itself an arcing horn.
  • FIG. 9 illustrates another alternative embodiment which, on the contrary, is more particularly suitable for circuit breakers having to ensure a high breaking capacity.
  • the fixed contact 27A and the calibrated conductor 64 which must ensure by convection the heating of the bimetallic strip 59 is formed on a cut part 74 of the metal strip 17A, suitably held in grooves of the housing 10, so that, as soon as the moving contact 28 moves away from the fixed contact 27A, the arc which then arises between this fixed contact 27A and this mobile contact 28 immediately passes over the current portion 75 of the metal strip 17A therefore forming an arc horn, sparing the cut part 74 thereof, and therefore the calibrated conductor 64.
  • This arrangement advantageously avoids this calibrated conductor 64 from collecting a dangerous thermal stress for its behavior.
  • a breakout striker 76 is associated with the movable contact 28, in order to best reduce the reaction time of the circuit breaker to a short circuit.
  • this striker striker comprises a T-piece, the middle part 77 of which extends transversely between the wings of the U-piece 54 forming a cylinder head, in the direction of the movable contact 28, and whose . branches 78 are arranged opposite said wings.
  • Such a striker 76 is capable of applying to the movable contact 28 an opening force as soon as a fault appears, and at the same time, and not after, that, according to the process described above, the hook 36 is released.
  • FIG. 10 This possibility is illustrated by FIG. 10, in which such a coil 83 is inserted in series between two successive sections of the metal strip 17A split for this purpose, and is passed over the middle part of the U-shaped part 54.
  • a coupling piece 84 in the example shown, this one, which is made of insulating material, has an I shape: by the wings of one of the ends it is engaged on the pallets forming armatures 55 of the tripping members 36 of the circuit breakers connected, and by the wings of its other end it is engaged in holes 85 of the U-shaped parts 54 of these circuit breakers: at the opening of one of these; the U-shaped part 54 drives the part at 1 84 which, by action on the pallet 55 of the other of these circuit breakers, in turn causes the opening of the latter.
  • the flexion spring used to form, according to the invention, the elastic opening means and the elastic return means in the arming position of the fastening member can vary in configuration, and for example have the conventional configuration of a bending spring in which the middle helical part has an axis perpendicular to the lateral branches which it controls, and not an axis substantially parallel to, or coincident with, such branches, as in the present case .
  • the breaking capacity being, at least within certain limits, proportional to the number of extinguisher plates 26 used, these are, for each particular use, put in sufficient number, this number can for example vary between 0 and 13 or more.
  • the hooking mechanism is of the type comprising a free rolling element, as described in French patent application No. 78 03760, it goes without saying that it could be of a different type; moreover, when it is a question, as in the present case, of an attachment mechanism with a free rolling element, it may individually be the subject of the variant embodiments described in the French patent application in question, in particular with regard to the measures taken to ensure negative alignment of the rolling elements in question.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP19790400179 1978-03-22 1979-03-19 Disjoncteur ayant un organe d'accrochage mobile soumis à des moyens élastiques de rappel Expired EP0004508B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7808263 1978-03-22
FR7808263A FR2420839A1 (fr) 1978-03-22 1978-03-22 Disjoncteur, son mecanisme de declenchement

Publications (3)

Publication Number Publication Date
EP0004508A2 EP0004508A2 (fr) 1979-10-03
EP0004508A3 EP0004508A3 (en) 1979-10-31
EP0004508B1 true EP0004508B1 (fr) 1982-12-08

Family

ID=9206142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400179 Expired EP0004508B1 (fr) 1978-03-22 1979-03-19 Disjoncteur ayant un organe d'accrochage mobile soumis à des moyens élastiques de rappel

Country Status (3)

Country Link
EP (1) EP0004508B1 (enrdf_load_stackoverflow)
DE (1) DE2964190D1 (enrdf_load_stackoverflow)
FR (1) FR2420839A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468991A1 (fr) * 1979-10-26 1981-05-08 Legrand Sa Disjoncteur et son mecanisme d'accrochage
US4931602A (en) * 1987-05-28 1990-06-05 Mitsubishi Denki Kabushiki Kaisha Multipole circuit breaker
FR3031233B1 (fr) * 2014-12-30 2017-01-27 Legrand France Appareil modulaire a securite renforcee et ensemble electrique auto-protege comprenant un tel appareil modulaire assemble a un disjoncteur
FR3031234B1 (fr) * 2014-12-30 2017-01-27 Legrand France Appareil modulaire a pion de liaison retractable et ensemble electrique auto-protege comprenant un tel appareil modulaire assemble a un disjoncteur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941058A (en) * 1957-02-05 1960-06-14 Fed Pacific Electric Co Automatic circuit breakers
DE1151056B (de) * 1961-05-02 1963-07-04 Licentia Gmbh Mechanismus fuer Selbstschalter
US3671908A (en) * 1970-04-10 1972-06-20 Zinsco Electrical Products Circuit breaker
US3953812A (en) * 1974-10-09 1976-04-27 General Electric Company Electric circuit breaker

Also Published As

Publication number Publication date
FR2420839B1 (enrdf_load_stackoverflow) 1981-11-06
EP0004508A2 (fr) 1979-10-03
FR2420839A1 (fr) 1979-10-19
DE2964190D1 (en) 1983-01-13
EP0004508A3 (en) 1979-10-31

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