EP0108022B1 - Schalter mit Trennung des Nulleiters - Google Patents
Schalter mit Trennung des Nulleiters Download PDFInfo
- Publication number
- EP0108022B1 EP0108022B1 EP19830402119 EP83402119A EP0108022B1 EP 0108022 B1 EP0108022 B1 EP 0108022B1 EP 19830402119 EP19830402119 EP 19830402119 EP 83402119 A EP83402119 A EP 83402119A EP 0108022 B1 EP0108022 B1 EP 0108022B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- breaker according
- movable
- neutral
- jaws
- 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
Links
Images
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 latching and tripping lever, the passage and maintenance in the latched 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 tripping; in the absence of such an arc extinguishing chamber, there was a rapid irreversible deterioration of these contacts due to such an arc.
- transmission means For piloting the neutral contacts, transmission means must therefore be established between the interlocking and tripping lever and these.
- German patent 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 says push-button.
- 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, and 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 compared to the other, of an electrodynamic repulsion effort, which tends to cause it immediately opening.
- 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 EP-A-0,028,958, while of course also being able to 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, which is mobile, is controlled in opening and closing by l adite interlocking 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 said cam means comprise a ramp which is formed by the side of a
- the neutral contacts transversely, are entirely arranged in the overall contour of the engagement and tripping lever.
- they do not encroach on the volume of the housing between the interlocking and tripping lever and the sole of said housing, and this volume can be used to the full for the implantation of the other components of the circuit breaker.
- 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 urging them transversely towards one another, for pinching, by the other of their ends, the associated fixed neutral contact.
- the two parallel jaws which thus comprises 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 compared to the other, an electrodynamic attraction effort likely to effectively counterbalance the electro-dynamic repulsion effort, each of which individually, they are also the object with respect to the associated fixed neutral contact.
- 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 in the form of two shells suitably facing each other 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 mounted to pivot on an axis 17.
- this mobile phase contact 13B is permanently urged towards a tripped position for which, as shown diagrammatically in broken lines in FIG. 1, it is removed from the fixed phase contact 13A with 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 his trigger position by elastic return means.
- this interlocking and triggering lever 23 forms a slide with linear displacement, which is mounted to move 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 thereof 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 cross-section in 1.
- the engagement and trigger lever 23 On the side of the side wall 24 of the housing 10, the engagement and trigger lever 23 has longitudinally, between the latter and its flange 30, a recess 32, and the free volume thus provided 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 latch and release lever 23, the passage and the maintenance in the latched 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, 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 41 A 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 41 B, it is connected to a terminal of connection 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 the engagement and release lever 23 has in hollow.
- 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 lower, than that D which separates them in line with their ends 44 and 46, the latter being in fact constituted by the thickness of the fixed neutral contact 40A and of the conduction member on which the movable neutral member 40B is pivotally mounted.
- 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 on the same conduction member 48, and the latter is simply formed by the end of the associated metal strip 41B.
- this conduction member 46 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 45, each have a stamped 50 , of circular contour complementary to that of the bore 49 and engages in journalling in the corresponding outlet thereof.
- 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 engagement and tripping lever 23 and the movable neutral contact 40B comprise, in addition to the ramp 61, that the contact te said lever d 'engagement and release 23, a follower pin 62, which, carried by said movable neutral contact 40B, is engaged with said ramp 61.
- the slide 63 which the engagement and disengagement lever 23 has in hollow and whose side forms the ramp 61 of this is formed on the middle flange 30 of this engagement and trigger, and this is a slide 63 which, parallel to the previous one, has a second flank 64, jointly forming return means for the follower pin 62 associated.
- 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 its previous engagement position to its trigger position under the bias of the spring 34 constituting the elastic return means 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 release lever 23 and the movable neutral contact 40B comprise, in this variant embodiment, in addition to the ramp 61 which the said engagement and release handle 23 has, 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 the 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 smaller amplitude, 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 neutral-mobile 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 contour 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 engagement and tripping lever 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 of the engagement and tripping lever, and, in particular, they can, at on the contrary, overflowing more or less of the overall outline thereof.
- the interlocking and tripping lever constitutes a slide with linear movement, it goes without saying that this is not necessarily so, this lever switching on and off which can, for example, also be pivotally mounted.
- circuit breakers of the type described in European patent application EP-A-0,028,958 mentioned above are not limited to circuit breakers of the type described in European patent application EP-A-0,028,958 mentioned above.
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- Breakers (AREA)
Claims (17)
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 EP0108022A1 (de) | 1984-05-09 |
EP0108022B1 true 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) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2683089B1 (fr) * | 1991-10-29 | 1993-12-31 | Merlin Gerin | Mecanisme de manóoeuvre pour disjoncteur tetrapolaire. |
Family Cites Families (3)
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 |
US4241297A (en) * | 1978-11-20 | 1980-12-23 | Eaton Corporation | Double-pole trigger speed control switch |
-
1982
- 1982-10-29 FR FR8218219A patent/FR2535521B1/fr not_active Expired
-
1983
- 1983-10-28 DE DE8383402119T patent/DE3365892D1/de not_active Expired
- 1983-10-28 EP EP19830402119 patent/EP0108022B1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0108022A1 (de) | 1984-05-09 |
FR2535521A1 (fr) | 1984-05-04 |
DE3365892D1 (en) | 1986-10-09 |
FR2535521B1 (fr) | 1985-12-27 |
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