EP0108022A1 - Schalter mit Trennung des Nulleiters - Google Patents

Schalter mit Trennung des Nulleiters Download PDF

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Publication number
EP0108022A1
EP0108022A1 EP19830402119 EP83402119A EP0108022A1 EP 0108022 A1 EP0108022 A1 EP 0108022A1 EP 19830402119 EP19830402119 EP 19830402119 EP 83402119 A EP83402119 A EP 83402119A EP 0108022 A1 EP0108022 A1 EP 0108022A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
engagement
breaker according
neutral
movable
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.)
Granted
Application number
EP19830402119
Other languages
English (en)
French (fr)
Other versions
EP0108022B1 (de
Inventor
Norbert Signorelli
Pierre Menghini
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 EP0108022A1 publication Critical patent/EP0108022A1/de
Application granted granted Critical
Publication of EP0108022B1 publication Critical patent/EP0108022B1/de
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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices

Definitions

  • the present invention relates generally to circuit breakers.
  • circuit breakers which, intended in practice for the equipment of multi-phase installations, are able to be able to ensure, not only a phase cut, but also a neutral sectioning.
  • such a circuit breaker comprises, overall, two phase contacts, at least one of which, which is movable, is biased by elastic opening means in the direction of a tripped position for which it is separated from the other, an engagement and trigger handle, which is movably mounted between an engagement position and a trigger position, and which is urged towards its trigger position by elastic return means, a control mechanism, which is adapted to ensure, on the one hand, under the control of the interlocking and tripping lever, the passage and maintenance in the engaged position of the mobile phase contact, and, secondly, under the control of a thermal and / or electromagnetic trip member, the release of said mobile phase contact, and two neutral contacts, one of which, which is mobile, is controlled in opening and closing by said engagement and trip lever .
  • phase contacts and the neutral contacts are arranged within the same housing.
  • the first relates to their establishment.
  • the space available for this purpose is measured, the interior volume of the housing already being essentially filled by the phase contacts, the control mechanism for these, and the arc extinguishing chamber, always relatively bulky, because comprising numerous deionization plates, usually provided for absorption of the arc inevitably arising between these phase contacts on trigger; in the absence of such an arc extinguishing chamber, there would quickly be an irreversible deterioration of these contacts due to such an arc.
  • the neutral contacts are arranged in the immediate vicinity of the soleplate of the housing, that is to say in the immediate vicinity that of the edges of this case by which it is adapted to be attached to any support.
  • transmission means For piloting the neutral contacts, transmission means must therefore be established between the interlocking and tripping lever and these.
  • circuit breaker having an overall architecture of the type of that of the circuit breaker described in the European patent application filed on October 24, 1980, under No. 80 401516.2 and published under No. 0028958, to which the present invention, although not necessarily limited to such an application, is more particularly intended.
  • German patent No. 960116 which relates to a push button circuit breaker, of very simplified and schematic architecture, the neutral contacts are arranged in the immediate vicinity of the push button and are controlled by the latter, cam means being provided between them and said bonton-pusher.
  • cam means are reduced to a chamfer provided at the base of the push button, the neutral contact controlled by the latter further comprising an end bent in a dihedral.
  • neutral contacts extend entirely next to the push button, net therefore necessarily require the presence, parallel to the latter, of a volume suitable for their location.
  • the second difficulty to be overcome with respect to neutral contacts is linked to the need for tripping to ensure a certain delay between the phase cut-off and the neutral isolation, to avoid that the neutral isolation charge.
  • phase contacts can be protected, by an arc extinguishing chamber, from the effects of the arc which then develop between them, it is hardly the same for the neutral contacts, due to the small volume still available in the modular box concerned.
  • the neutral contacts like the phase contacts, are the object, one with respect to the other, of an electrodynamic repulsion effort, which tends to cause it to open immediately.
  • the present invention generally relates to provisions which, on the contrary, are particularly suitable for circuit breakers having an architecture similar to that of the circuit breaker described in European patent application No. 80 401516.2, while of course also being able. well apply to other circuit breakers if desired, and which, in a very simple manner, makes it possible to overcome in a particularly satisfactory manner the difficulties, succinctly recalled above, relating to the neutral contacts.
  • the present invention relates to a circuit breaker of the type comprising, in the same housing two phase contacts, at least one of which, which is movable, is biased by elastic opening means in the direction of a triggered position for which it is separated from the other, an engagement and trigger lever, which is movably mounted between an engagement position and a trigger position, and which is biased towards its trigger position by elastic return means, a control mechanism, which is adapted to ensure, on the one hand, under the control of the interlocking and tripping lever, the passage and maintenance in the engaged position of the mobile phase contact, and , on the other hand, under the control of a thermal and / or electromagnetic trip member, the release of said mobile phase contact, and two neutral contacts, one of which is movable, is piloted in opening and closing by said engagement and tripping lever, cam means being provided for this purpose between it and the latter, this circuit breaker being, according to a first aspect, characterized in that the said cam means comprise a ramp which is formed by the side of a slide which the latter,
  • the neutral contacts transversely, are entirely arranged in the overall contour of the engagement and tripping lever.
  • the neutral contacts can also extend if desired in the said volume, under the engagement and tripping lever.
  • the movable neutral contact is, according to the invention, in direct contact with the interlocking and tripping lever, so that no transmission element is to be provided between that and him for his piloting.
  • the circuit breaker according to the invention is further characterized in that the movable neutral contact is split into two parallel jaws, which, at one of their ends, are pivotally mounted on a conduction member, and which are subjected to elastic clamping means permanently biasing them transversely towards one another, for pinching, by the other from their ends, from the associated fixed neutral contact.
  • the two parallel jaws thus comprising according to the invention the movable neutral contact are traversed by currents of the same direction, parallel to each other, so that they are the object, the one in relation to the other, an electro-dynamic attraction force such as to effectively counterbalance the electro-dynamic repulsion effort of which, each individually, they are moreover the object with respect to the fixed neutral contact associated.
  • the movable neutral contact advantageously does not systematically tend to open.
  • the duration of this arc is always less than ten milliseconds, and that the time required for the joystick to trip from trip to trip position is always more than ten milliseconds in circuit breakers of the type concerned.
  • the switching on and off lever very simply ensures, according to the invention, a systematic closing of the mobile neutral contact before that of the mobile phase contact.
  • such a circuit breaker comprises a housing 10 formed of two shells suitably facing one another and suitably linked to each other by screws or rivets.
  • the first, the contact 13A, is fixed, and it consists of a portion of a metal strip 14A which connects it to a connection terminal 15A with clamping screw 16A accessible from the outside.
  • the second, the contact 13B, is mobile, and, more precisely, it is pivotally mounted on an axis 17.
  • this movable phase contact 13B is permanently biased towards a triggered position for which, as shown diagrammatically in broken lines in FIG. 1, it is moved away from the fixed phase contact 13A to which it is associated.
  • the mobile phase contact 13B is connected to a connection terminal 15B with tightening screw 16B accessible from the outside.
  • connection terminals 15A, 15B are in practice each disposed respectively at the opposite ends of the housing 10.
  • an engagement and trigger lever 23 which is movably mounted between an engagement position, Figures 1 to 4, and a trigger position, Figure 7, and which is continuously stressed towards its release position by elastic return means.
  • this interlocking and triggering lever 23 forms a slide with linear displacement, which is mounted movably longitudinally in the housing 10, from one of the connection terminals 15A, 15B to the other, between, on the one hand, the two side walls 24, 24 ′ of said housing 10, and, on the other hand, the front edge 25 of the latter and an internal partition 26 parallel to the latter, FIG. 3.
  • This slide which is hollow, and generally forms a box open laterally and at each of its ends, comprises a sole 28 and a cover 29, which extend parallel to each other, and which are connected one to the other by a lateral flange 30, the assembly having an eccentric I-shaped cross section.
  • the interlocking and triggering lever 23 On the side of the side wall 24 of the housing 10, the interlocking and triggering lever 23 has longitudinally, between the latter and its flange 30, a recess 32, and the free volume thus formed is used, in particular, to the passage of the bimetallic strip 21.
  • the engagement and trigger handle 23 has longitudinally between the latter and its flange 30, a recess 32 ′, which, in practice, in the embodiment shown , is of less importance than the previous recess 32.
  • the elastic return means associated with the engagement and trigger lever 23 are constituted by a torsion spring 34, which, by one of its branches, bears on the metal strip 14B, and which, by the other of these, relates to this interlocking and tripping lever 23, and, more precisely, on the edge of the sole 28 thereof.
  • a control mechanism 35 which is adapted to ensure, on the one hand, under the control of the engagement and release lever 23, the passage and the maintenance in the engaged position of the contact 13B mobile phase, that is to say the support thereof against the fixed phase contact 13A with which it is associated, and, on the other hand, under the control of a trigger member, at least , the release of this mobile phase contact 13B.
  • two triggering members are provided.
  • thermal trip member which is constituted by bimetallic strip 21.
  • a magnetic, or more precisely electromagnetic, triggering member which is disposed in the recess 32 of the engagement and trigger lever 23, between the flange 30 of the latter and the wall 24 of the housing 10, and which is formed of a cylinder head 36, FIG. 3, and of a pallet 37, FIG. 1, pivotally mounted with respect to this cylinder head 36.
  • control mechanism 35 comprises a locking mechanism 38, which is established between the engagement and disengagement lever 23 and the housing 10, and which is capable of holding disengageably in position this interlock and trigger lever 23, on the one hand, and a hooking mechanism 39, which is established between said interlock and trigger lever 23 and the movable phase contact 13B, and which comprises two latching members capable of engaging disengageably with each other, for maintaining in the latching position of this mobile phase contact 13B, on the other hand.
  • the first which is fixed, is formed by the end of a metal strip 41A by which it is connected to a connection terminal 42A with clamping screw 43A accessible from the outside of the housing 10.
  • the second which is mobile, as described in more detail below, is controlled in opening and closing by the engagement and trigger lever 23, and, by a metal strip 41B, it is connected to a connection terminal 42B with clamping screw 43B accessible from outside the housing 10.
  • connection terminals 42A, 42B have a constitution similar to that of the connection terminals 15A, 15B, and, like these, they are each respectively arranged at the ends of the housing 10, parallel to said connection terminals 15A, 15B.
  • connection terminals 15A, 15B being arranged on a first side of this median plane, while the connection terminals 42A, 42B are arranged. on the other side of it, as schematically illustrated in Figure 2.
  • the movable neutral contact 40B is directly controlled by the interlocking and tripping lever 23, cam means suitable for this purpose, being established for this purpose between itself and this interlocking and tripping lever 23.
  • these cam means comprise a ramp 61 which is formed by the side of a slide 63 which is hollow in the engagement lever and trigger 23.
  • the neutral contacts 40A, 40B extend laterally, in the recess 32 'of the engagement and release lever 23, between the median flange 30 thereof and the wall 24 'of the housing 10.
  • the movable neutral contact 40B is split into two parallel jaws 43, which, at one of their ends, the end 44, are pivotally mounted on a conduction member, as described in more detail below, and which are subjected to elastic clamping means, also detailed below, urging them permanently transversely towards one of the 'other, for pinching, by the other of their ends, the end 46, of the associated fixed neutral contact 40A.
  • the median section 47 of each of these jaws 43 is offset transversely relative to the ends 44, 46 of these, each in the direction of the opposite jaw, so that the distance d separating one from the other the jaws 43 in line with their median sections 47 for the closed position illustrated by FIGS. 4, 6 and 9 is less than that D which separates them in line with their ends 44 and 46, that -this being in fact constituted by the thickness of the neutral contact.
  • the two jaws 43 constituting the latter are at a distance from each other at each of their points, with the possible exception of their end 44 by which they are pivotally mounted on a conduction member.
  • these jaws 43 are moreover pivotally mounted together on the same conduction member 48, and the latter is simply formed by the end of the associated metal strip 41B.
  • this conduction member 48 comprises transversely a bore 49, of circular outline, and the jaws 43, which are each established respectively at the start and the other of this conduction member 48, each comprise a stamped 50 , of circular contour complementary to that of hole 49 and engaged in a journal ment in the corresponding outlet of it.
  • the elastic clamping means associated with the jaws 43 constituting the movable neutral contact 40B are formed by an elastic washer 52, of the "BELLEVILLE” washer type for example. , as shown, and they bear directly on one of said jaws 43 by bearing on an axis 53 which, crossing the jaws 43 in the median zone of their median sections 47, is itself supported on the other of those -this.
  • the elastic washer 52 bears on the transverse shoulder 58 separating from one another the section of greater diameter 54 and the section of intermediate diameter 55.
  • the axis 53 crosses the other jaw 43, and, in practice, it is crimped on the latter, this jaw 43 bearing on the transverse shoulder 59 separating the section of intermediate diameter 55 of said axis 53 of its section of smaller diameter 56.
  • the elastic washer 52 advantageously ensures, in addition to biasing one towards the other of the two jaws 43 for pinching by them of the fixed neutral contact 40A, an absorption of the inevitable manufacturing and mounting.
  • the cam means provided between the interlocking and tripping lever 23 and the movable neutral contact 40B comprise, in addition to the ramp 61 presented by said interlocking lever and trigger 23, a follower pin 62, which, carried by said movable neutral contact 40B, is in engagement with said ramp 61.
  • the slide 63 which is hollow in the engagement and trigger lever 23, and whose side forms the ramp 61 thereof is formed on the median flange 30 of this lever engagement and release, and it is a slide 63 which, parallel to the previous one, has a second flank 64, jointly forming return means for the associated follower pin 62.
  • the slide 63 is elongated in a buttonhole, and, having two parallel levels connected to each other by a zone making an inflection point, it opens outwards at one of the ends of the median flange 30 of the engagement and trigger lever 23, due, in particular, to the relatively moderate length of this median flange 30.
  • the slide 63 is blind.
  • the follower pin 62 carried by the movable neutral contact 40B is simply formed by an axial extension of the axis 53 controlling, in cooperation with the elastic washer 52, the relative positioning one relative to the other of the two jaws 43 constituting this movable neutral contact 40B.
  • the movable neutral contact 40B is in the closed position, under the control of the ramp 64 of the slide 63 that according to the invention comprises this switch on and off 23.
  • control mechanism 35 causes the release of the mobile phase contact 13B, the engagement and tripping handle 23, it- even when released, moves from position of previous engagement in its triggered position under the bias of the spring 34 constituting the elastic return means which are associated with it, FIG. 1.
  • the opening of the movable neutral contact 40B, or neutral sectioning is due, thanks to the arrangements according to the invention, only to the mechanical action of the engagement and tripping lever 23, according to the process described above.
  • this opening does not occur systematically until after the extinction of the arc which has also arisen between the phase contacts 13A, 13B.
  • a determined sequence is systematically ensured between, on the one hand, the opening of the phase, and, on the other hand, the sectioning of the neutral.
  • the slide 63 that the engagement and trigger lever 23 has in hollow is on a single side, this slide 63 being reduced to the ramp 61 formed by the latter.
  • this slide 63 is indeed hollow thereon.
  • the ramp 61 generally has a trapezoidal contour, with two oblique sections 66A, 66B each disposed respectively on either side of a median section.67 substantially parallel to the sole 28 and to the cover 29 of the interlocking lever. and trigger 23, said oblique sections 66A, 66B both extend from said cover 29 thereof, converging towards one another.
  • the cam means provided between the engagement and trigger lever 23 and the movable neutral contact 40B comprise, in this variant embodiment, in addition to the ramp 61 which the said engagement and trigger handle 23 presents, at minus a spoiler 68, which, projecting from said movable neutral contact 40B, at a distance from its pivot axis, formed as previously by the axis ' of the bore 49 of the conduction member 48, is able to cooperate with said ramp 61.
  • the movable neutral contact 40B further comprises, projecting laterally, for the constitution of return means, a second spoiler 70, which, disposed on the other side of its pivot axis with respect to its first spoiler 68, is able, like this one, to cooperate with the ramp 61 presented by the engagement and trigger lever 23.
  • the spoiler 68 forms a bent end of the movable neutral contact 40B, on the side of its pivot axis, beyond the latter, while the spoiler 70, which is of amplitude lesser, forms a boss between said pivot axis and the free end of this movable neutral contact 40B.
  • Both are largely rounded, and they both extend on the same side, in the direction of the cover 29 of the engagement and release lever 23.
  • the elastic clamping means associated with the jaws 43 constituting the movable neutral contact 40B are formed by a U-shaped spring 72, pinching said jaws 43 and carried by them.
  • this U-shaped spring 72 is engaged, by each of its wings 73, with a boss 74 of circular outline provided for this purpose, for example by a single puncture, as shown, on the corresponding jaw 43, and, more precisely, the median section 47 thereof, in the direction opposite to the other jaw 43.
  • each of the wings 73 is simply wound around the boss 74 of the corresponding jaw 43.
  • the wings 73 of the U-shaped spring 72 which, overall, extend on the side of the free end 46 of the jaws 43, each bite at least in part, in plan, FIG. 10, on the thickness of such a free end 46, so as to be able to be driven by said jaws 43.
  • these wings 73 are sufficiently extended so that the elbow 75 which connects them can come to bear on a stopper 76 provided for it on the corresponding near wall of the housing 10.
  • the handle engagement and trigger 23 causes, by its movement, the opening of the movable neutral contact 40B, the section 66B of the ramp 61 which it comprises then acting on the spoiler 68 of the latter; during this opening, the movable neutral contact 40B upwards drives the U-shaped spring 72 which it carries, the latter finding its place thanks to the volume released by the interlocking and tripping lever 23, such that shown schematically in broken lines in Figure 9; at the end of the movement of the engagement and release lever 23, the middle section 67 of the ramp 61 of the latter maintains the movable neutral contact 40B in the open position, as also shown diagrammatically in broken lines in the figure 9.
  • the U-shaped spring 72 used advantageously allows, in this alternative embodiment, to have a less steep elasticity slope than that given by a BELLEVILLE washer and therefore to be able to be satisfied with wider tolerances.
  • the neutral contacts could just as easily be installed under the interlocking and tripping lever, between the latter and the corresponding internal partition of the housing, although the preceding arrangement is preferred, because it makes it possible to advantageously take advantage of a volume which is usually dead, without encroaching on the volume of the housing situated directly above said engagement and trigger lever.
  • the neutral contacts are not necessarily entirely arranged in a recess in the engagement and tripping lever, and, in particular, they can, at on the contrary, extend more or less from the overall outline of it.
  • the interlocking and tripping lever constitutes a slide with linear movement
  • this lever switching on and off which can, for example, also be pivotally mounted.
  • circuit breakers of the type described in European patent application No. 80 401516.2 mentioned above, but on the contrary extends to any other type of circuit breaker.

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EP19830402119 1982-10-29 1983-10-28 Schalter mit Trennung des Nulleiters Expired EP0108022B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218219 1982-10-29
FR8218219A FR2535521B1 (fr) 1982-10-29 1982-10-29 Disjoncteur a sectionnement de neutre

Publications (2)

Publication Number Publication Date
EP0108022A1 true EP0108022A1 (de) 1984-05-09
EP0108022B1 EP0108022B1 (de) 1986-09-03

Family

ID=9278761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830402119 Expired EP0108022B1 (de) 1982-10-29 1983-10-28 Schalter mit Trennung des Nulleiters

Country Status (3)

Country Link
EP (1) EP0108022B1 (de)
DE (1) DE3365892D1 (de)
FR (1) FR2535521B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683089A1 (fr) * 1991-10-29 1993-04-30 Merlin Gerin Mecanisme de manóoeuvre pour disjoncteur tetrapolaire.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960116C (de) * 1954-01-23 1957-03-14 Licentia Gmbh Selbstschalter mit abschaltbarem Nulleiter
US2907856A (en) * 1950-09-26 1959-10-06 Fed Pacific Electric Co Electric switches
EP0011440A1 (de) * 1978-11-20 1980-05-28 Cutler-Hammer World Trade, Inc. Zweipoliger Drucktaster zur Geschwindigkeitssteuerung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907856A (en) * 1950-09-26 1959-10-06 Fed Pacific Electric Co Electric switches
DE960116C (de) * 1954-01-23 1957-03-14 Licentia Gmbh Selbstschalter mit abschaltbarem Nulleiter
EP0011440A1 (de) * 1978-11-20 1980-05-28 Cutler-Hammer World Trade, Inc. Zweipoliger Drucktaster zur Geschwindigkeitssteuerung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683089A1 (fr) * 1991-10-29 1993-04-30 Merlin Gerin Mecanisme de manóoeuvre pour disjoncteur tetrapolaire.
EP0540431A1 (de) * 1991-10-29 1993-05-05 Schneider Electric Sa Betätigungsvorrichtung für vierpoligen Lastschalter
US5357066A (en) * 1991-10-29 1994-10-18 Merlin Gerin Operating mechanism for a four-pole circuit breaker

Also Published As

Publication number Publication date
EP0108022B1 (de) 1986-09-03
DE3365892D1 (en) 1986-10-09
FR2535521A1 (fr) 1984-05-04
FR2535521B1 (fr) 1985-12-27

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