EP0054499B1 - Schalter mit Trennung des Nulleiters - Google Patents

Schalter mit Trennung des Nulleiters Download PDF

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Publication number
EP0054499B1
EP0054499B1 EP19810402004 EP81402004A EP0054499B1 EP 0054499 B1 EP0054499 B1 EP 0054499B1 EP 19810402004 EP19810402004 EP 19810402004 EP 81402004 A EP81402004 A EP 81402004A EP 0054499 B1 EP0054499 B1 EP 0054499B1
Authority
EP
European Patent Office
Prior art keywords
movable
contact
circuit breaker
tripping
closing
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
EP19810402004
Other languages
English (en)
French (fr)
Other versions
EP0054499A1 (de
Inventor
Jean Pierre Negre
Roger Paolini
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
Priority claimed from FR8026640A external-priority patent/FR2496335A1/fr
Priority claimed from FR8108403A external-priority patent/FR2504725A1/fr
Application filed by Legrand SA filed Critical Legrand SA
Publication of EP0054499A1 publication Critical patent/EP0054499A1/de
Application granted granted Critical
Publication of EP0054499B1 publication Critical patent/EP0054499B1/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

Definitions

  • the present invention relates generally to circuit breakers.
  • a circuit breaker generally comprises a fixed contact, a movable contact urged by elastic opening means in the direction of a tripped position for which it is away from said fixed contact, and a control mechanism intended to ensure, on the one hand, the passage and the maintenance in the latched position of said movable contact, under the control of an engagement and release lever mounted movably between an engaged position and a tripped position, and, secondly on the other hand, the release of this movable contact, in response to the movable element of a triggering member, which can for example be a magnetic triggering member or a thermal triggering member.
  • Such a circuit breaker is inserted by its fixed and mobile contacts on the conductor to be checked, and, in a polyphase installation, it is in practice a phase conductor.
  • phase conductor is for example the seat of a short circuit
  • the movable contact which is therefore a phase contact
  • the magnetic trip member it is the same in the case of an overload, the triggering member then intervening being the thermal triggering member.
  • the circuit breakers meeting this requirement therefore comprise, in addition to a fixed phase contact and a mobile phase contact, with the corresponding control means, as recalled above, at least one fixed neutral contact and a piloted mobile neutral contact. in closing and opening by an engagement and release lever mounted movable between an engaged position and a triggered position.
  • two separate modules are in fact associated, one for the phase contacts, and the other for the neutral contacts, and these separate modules are each controlled by a lever d individual engagement and triggering, that of the phase module being provided with a lateral extension by which it can control that of the neutral module in engagement, but not in triggering, and the latter being able to be controlled in triggering only using a tool.
  • phase contacts and the neutral contacts are arranged in the same module, and they are controlled by the same engagement and tripping lever.
  • phase conductors can be protected from the effects of the arc which then develop between them, it is hardly the same for the neutral conductors, because the small volume available in the single module concerned.
  • the present invention generally relates to a provision for overcoming this difficulty.
  • a circuit breaker of the type comprising a fixed phase contact, a mobile phase contact urged by elastic opening means in the direction of a tripping position for which it is moved away from said contact.
  • fixed phase a control mechanism intended to ensure, on the one hand, the passage and the maintenance in the latched position of said mobile phase contact, under the control of a latching and tripping lever mounted movably between a latched position and a tripped position, and, on the other hand, the release of this movable phase contact, in response to the movable element of a tripping member, at least one fixed neutral contact, one movable neutral contact controlled in closing and opening by said engagement and trigger handle and a disengageable locking member which, under the control of the movable element of the trigger member, is movable between an unlocking position, for the which it leaves free the moving neutral contact, and a locking position, for which it temporarily maintains the latter in the latched position, this circuit breaker being characterized in that said locking member
  • the engagement and tripping lever is blocked in the engaged position, and it itself maintains said engaged neutral contact in the engaged position.
  • the same module can advantageously contain the phase contacts and the neutral contacts, and therefore, the same interlocking and tripping lever be common to these.
  • the interlocking and tripping lever is connected to the movable neutral contact via a connecting rod and an elastic means, one of the roles of which is to maintain the desirable contact pressure between this movable neutral contact and the fixed neutral contact with which it is associated.
  • the connecting rod is then the object of a thrust, which could result in a disturbance of the operation of the assembly.
  • the movable neutral contact passes through the yoke of a magnetic circuit of which it carries the armature.
  • the aforementioned magnetic circuit remains energized and the contact mobile neutral is attracted by the corresponding cylinder head, which tends to keep it in the engaged position.
  • circuit breaker according to the invention will not be described here in all its details, only being more particularly made here the description of those of its elements, shown in accented lines in the figures, which are necessary for understanding the invention.
  • Such a circuit breaker generally comprises a housing 10 formed, in the embodiment shown, of two shells 11, 11 'suitably facing one another and suitably connected to each other by screws or rivets.
  • This box 10 is equipped laterally, accessible from the outside, on the one hand, with two phase connection terminals 12A, 12B, shown in solid lines in FIG. 1, and on the other hand, with two connection terminals for neutral 13A, 13B, shown in broken lines in this figure 1.
  • a fixed phase contact 14 Internally, it contains, in particular, a fixed phase contact 14, a mobile phase contact 15, a control mechanism 16, detailed below, a magnetic trip member 17, and a thermal trip member 18.
  • It also contains at least one fixed neutral contact, and in practice two fixed neutral contacts 19A, 19B, and one movable neutral contact 20.
  • the fixed phase contact 14 forms one of the external plates of a deionization chamber 22, the other plates of which have not been shown in the figures.
  • the mobile phase contact 15 has, in its central region, a slot 23, and, in line with the latter, it carries, by two lateral wings 24, 24 ', a pin 25 mounted movably in grooves 26, 26' shells 11, 11 'of the housing 10.
  • Elastic opening means permanently urge it towards this triggered position.
  • the magnetic trip member 17 comprises a coil 27 and a core 28 mounted to move in the axis thereof, while the thermal trip member 18 is formed by a bimetallic strip carried by a plate 29 adjustable in position under the control of a screw 30 accessible from the outside.
  • phase connection terminal 12A is connected to one end of this bimetal strip, while the other end of the latter is connected by a braid 33 to the mobile phase contact 15.
  • the fixed phase contact 14 is connected to one of the ends of the coil 27 of the magnetic trip member 17, while the other end of this coil 27 is, similarly, connected to the phase connection terminal 12B.
  • the control mechanism 16 is intended to ensure, on the one hand, the passage and the maintenance in the engaged position of the mobile phase contact 15, under the control of an engagement and trigger lever 35, and, on the other hand, the release of this mobile phase contact 15, in response either to the mobile core 28 of the magnetic trip member 17, or, via this mobile core 28, to the bimetallic strip 18 constituting the thermal trip member 18, this bimetal strip having for this purpose its end disposed opposite said movable core 28, for action thereon.
  • the engagement and trigger lever 35 which, in general, is movably mounted between an engaged position, FIG. 1, and a triggered position, FIG. 5, and which, for its control , projecting finger 40 accessible from the outside, is, by pins 42, 42 'which it has laterally, pivotally mounted in the shells 11, 11' of the housing 10.
  • torsion spring which will not be detailed here, it is permanently biased towards its triggered position.
  • a buttonhole 45 In its central zone, it is largely hollowed out by a slot 43, and it is integral with two flanges 44, 44 ′ jointly forming a buttonhole 45.
  • this buttonhole 45 has a development forming a locking notch 46.
  • control mechanism 16 also comprises, on the one hand, a latching and locking lug 48, and on the other hand, a trigger lever 49.
  • the latching and locking lug 48 is engaged transversely in the buttonhole 45 of the engagement and release lever 35, and, at its ends, it is slidably mounted in grooves 50, 50 'of the shells 11, 11 'of the housing 10.
  • the trigger lever 49 is generally bent.
  • the trigger lever 49 On either side of this bend zone, the trigger lever 49 has two arms 52, 53.
  • the arm 52 is engaged with the movable core 28 of the magnetic trip member 17, its end, which for this purpose has a circular contour, being engaged in a slot 54 of this movable core 28.
  • the arm 53 presents, for cooperation with the latching and locking lug 48, a latching notch 55; moreover, in the embodiment shown, it includes an extension 56 which, for its guidance, is engaged in the slot 43 of the engagement and release lever 35.
  • the fixed neutral contacts 19A, 19B which are each respectively connected by a suitable copperware to the corresponding neutral connection terminals 13A, 13B, are opposite, and the movable neutral contact 20 associated with them has, overall, the shape of a jumper.
  • this movable neutral contact 20 passes right through a movable spacer in the form of a cage 58, which is made of insulating material, and it is subjected to elastic means, a simple spring 59 in this form of realization, which are supported on this mobile spacer 58.
  • the same interlocking and tripping lever is common to the mobile phase contact 15 and to the movable neutral contact 20, so that the interlocking and tripping lever driving the latter is constituted by the engagement and release lever 35 described above.
  • a disengageable locking member 60 which, under the control of the movable core 28 of the magnetic trigger member 17, is movable between an unlocking position, FIG. 1, for which it leaves free the moving neutral contact, and a locking position, Figure 3, for which it temporarily maintains it in the engaged position.
  • the disengageable locking member 60 intervenes by means of the engagement and trigger lever 35, said locking member 60 leaving said engagement and trigger handle 35 free when it is in position. unlocking, and temporarily holding it in the released position when it is in the locked position.
  • this disengageable locking member 60 forms a pawl pivotally mounted in the housing 10, by a pin 61, and comprises two spouts 63, 64, one for the action of the movable core 28 of the magnetic trigger member 17, the other for action on the engagement and trigger lever 35.
  • the spout 63 therefore extends opposite the movable core 28 of the magnetic trip member 17, and this movable core 28 includes an extension 65 allowing it to act on this spout 63.
  • the engagement and trigger lever 35 has a shoulder 66, formed by means of a notch 67.
  • this connecting rod 70 is articulated, on the one hand, to the spacer 58, at one of its ends, by a lug 71 mounted pivotally in a bore 72 thereof, and, on the other hand, to the interlocking and tripping lever 35, by a lug 73 also pivotally mounted in a bore 74 thereof.
  • the hooking catch 55 of the release lever 49 is engaged with the hooking and locking catch 48, and the latter is engaged with the locking catch 46 of the engagement and tripping lever 35, so that, the control mechanism 16 being thus locked, the mobile phase contact 15 is kept in abutment against the fixed phase contact with which it is associated.
  • the mobile spacer 58 carrying the mobile neutral contact 20 is in the low position, so that the spring 59 associated with this mobile neutral contact 20 applies this against the fixed neutral contacts 19A, 19B with which it is associated. .
  • the magnetic trip member 17 comes into action, so that its movable core 28 is controlled in movement, according to arrow F1 in the figure 1.
  • the control mechanism 16 being unlocked, the mobile phase contact 15 passes into the triggered position, under the stress of the opening spring 21 which is associated with it, FIG. 4, and it drives with it the trigger lever 49.
  • the movable neutral contact 20 is therefore, throughout the duration of the arc in question, maintained in the closed position.
  • the rod 70 in turn drives the movable spacer 58, and, by the lower part of the cage constituting the latter, the movable neutral contact 20, so that the latter moves away from the neutral contacts fixed 19A, 19B and goes into the open position, Figure 5, for which the continuity of the neutral conductor is in turn interrupted.
  • the trigger lever 49 is again engaged with the latching and locking lug 48, by its latching notch 55, so that the control mechanism 16 is reset.
  • the thermal trigger member 18 which comes into action: the bimetallic strip which constitutes it acts on the movable core 28 of the magnetic trigger member 17, and a triggering process similar to that described above develops.
  • the mobile neutral contact 20 is pivotally mounted around a fixed axis 87.
  • this cylinder head 81 has a U-shaped profile, and it therefore comprises two wings 83, 83 'and a sole 84, and, jointly, the movable contact 20 extends at least partly between said wings 83, 83 'of the cylinder head 81, and the frame 82 which it carries projects laterally to cooperate with them.
  • the armature 82 is fixed to the movable contact 20 by spot welding, and, at its ends 85, 85 ', the sole 84 of the cylinder head 81 is made integral with the housing 10, by engagement in two grooves 86, 86 'thereof.
  • a connecting rod 70 is articulated at one of its ends to said interlocking and tripping lever 35.
  • the mobile spacer to which the connecting rod 70 is articulated at its other end by a lug 71 is a lever 89 which is pivotally mounted in a bore 72 of this connecting rod 70, and which is itself articulated on the housing 10, by a pin 90 pivotally mounted in bores 91, 91 'of the shells 11, 11' thereof.
  • the connecting rod 79 has, at its lower end, a notch 106, delimited by a stop 107, and the frame 82 secured to the contact 20, which for this purpose has an extension 82A, is engaged by the latter in said notch 106 of the connecting rod 70.
  • the spring 59 is a torsion spring comprising two torsion branches 92, 92 ′ of opposite pitch, and, by these, it is mounted on the axis 90, in a recess 93 of the lever 89.
  • this spring 59 bears on the armature 82 of the magnetic circuit associated with the movable neutral contact 20, and by the end of these branches of twist 92, 92 ', it is supported on a shoulder 96 of the lever 89.
  • the spring 59 exerts pressure on the shoulder 96 of the lever 89, in the direction of the arrow C1 in FIG. 6, and on the frame 82, in the direction of the arrow C2 in this FIG. 6.
  • a U-shaped rod 100 is further pivotally mounted on the engagement and trigger lever 35 by a bending 101, which engages in a bore 102 of the flange 44. Its opposite end 103, which forms the base of the U, and which extends in the vicinity of the mobile phase contact 15, is left free, but it can act on said mobile phase contact 15, being guided laterally by a lug 104 of the shells 11, 11 'and the arm 53 of the trigger lever 49.
  • the magnetic circuit consisting of the yoke 81 and the armature 82 is all the more excited that, due to the electric arc having then arisen between the phase contacts 14, 15, the current passing through it has increased and is then very high.
  • the force of attraction which results therefrom between this cylinder head 81 and this armature 82 increases in proportion, and, applied to the movable neutral contact 20, it contributes at least partially to the maintenance in the engaged position thereof, thereby relieving as much the force which must also be applied to this movable neutral contact 20, via the lever 89 and the spring 59, the connecting rod 70.
  • the armature 82 linked to the movable neutral contact 20 is released from any magnetic attraction, and, the engagement and tripping lever 35 being itself released by the disengageable locking member 60, the connecting rod 70 comes, by its stop 107, to tear off and drive this movable neutral contact 20, as did previously, in the embodiment shown in FIGS. 1 to 5, the lower part of the cage then constituting the movable spacer 58 associated, for passage into the tripped position of this neutral contact mobile 20.
  • Such an arrangement is favorable to safety insofar as the assured neutral sectioning is “fully visible”: when the engagement and tripping lever 35 is in the tripped position, the movable neutral contact 20 is then also with certainty in the triggered position.
  • the end 103 of the rod 100 abuts on the mobile phase contact 15 and delays the closing of the latter, so that, by the action of the spring 59, the mobile neutral contact 20 finds it engaged before him.
  • the end 103 of the rod 100 very quickly pushes the phase contact 15, so that, again, the opening of the latter, thus accelerated, takes place before that of the movable neutral contact 20.
  • the engagement and trigger lever 35 could be slidingly mounted.
  • the disengageable locking member associated with it can be very simply formed directly by an extension of the movable core 28 of the magnetic trigger member 17.
  • the connecting rod 70 to which the movable neutral contact 20 is subjected can cooperate with a cam integral with this interlocking and tripping lever 35.
  • the movable element of the magnetic trip member may as well be, for example, a pallet mounted pivotally or movable parallel to itself, provided that this element, in deployed position, when the magnetic trip member is energized, either able to act on the disengageable locking member according to the invention, either directly or indirectly.

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  • Breakers (AREA)

Claims (12)

1. Trennschalter mit einem festen Phasenkontakt (14), einem bewegbaren Phasenkontakt (15), der über elastische Öffnungsmittel (21) in Richtung einer gelösten Stellung vorgespannt ist, in der er von dem festen Phasenkontakt (14) frei ist, mit einem Steuermechanismus (16), dazu bestimmt, einerseits den Hinweg zu und das Halten in einer Schließstellung für den bewegbaren Phasenkontakt (15) zu sichern unter Steuerung durch einen Schließ-und Löse-Betätigungsgriff (35), der zwischen einer Schließstellung und einer Lösestellung bewegbar befestigt ist, und andererseits die Befreiung des bewegbaren Phasenkontaktes (15) sicherzustellen, in Abhängigkeit von dem bewegbaren Element (28) eines Löseorgans (17), mit mindestens einem feststehenden Nulleiterkontakt (19), einem bewegbaren Nulleiterkontakt (20), der in Schließung und Lösung durch den Schließ- und Löse-Betätigungsgriff (35) geführt wird, und mit einem lösbaren Verriegelungsorgan (60), das, unter Steuerung durch das bewegbare Element (28) des Löseorgans (17) zwischen einer Entriegelungsstellung, in der es den bewegbaren Nulleiterkontakt (20) freiläßt, und einer Verriegelungsstellung, in der es diesen zeitweise in der Schließstellung hält, bewegbar ist, dadurch gekennzeichnet, daß das Verriegelungsorgan (60) durch Vermittlung des Schließ-und Lösebetätigungsgriffes (35) einwirkt, daß das Verriegelungsorgan (60) den Schließ- und Löse- betätigungsgriff (35) freiläßt, wenn es sich in der Entriegelungsstellung befindet und ihn zeitweilig in der Schließstellung hält, wenn es sich in der Verriegelungsstellung befindet.
2. Trennschalter nach Anspruch 1, bei, dem das lösbare Verriegelungsorgan (60) schwenkbar befestigt ist, dadurch gekennzeichnet, daß das lösbare Verriegelungsorgan (60) zwei Nasen (63, 64) aufweist, eine für die Betätigung des bewegbaren Elementes (28) des Löseorgans (17), die andere für die Betätigung des Schließ- und Lösebetätigungsgriffs (35).
3. Trennschalter nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß für die Betätigung des lösbaren Verriegelungsorgans (60) der Schließ- und Lösebetätigungsgriff (35) eine Schulter (66) aufweist.
4. Trennschalter nach einem der Ansprüche 1 bis 3, bei dem der bewegbare Nulleiterkontakt (20) durch elastische Mittel (59) beaufschlagt ist, die sich an einem bewegbaren Stegteil (58, 89) abstützen, dadurch gekennzeichnet, daß das bewegbare Stegteil (58, 59) mit einer durch den Schließ- und Lösebetätigungsgriff (35) geführten Stange (70) gekoppelt ist.
5. Trennschalter nach Anspruch 4, bei dem der Schließ- und Lösebetätigungsgriff (35) schwenkbar befestigt ist, dadurch gekennzeichnet, daß die Stange (70) einerseits an dem Schließ- und Lösebetätigungsgriff (35) an ihrem einen Ende und andererseits an dem bewegbaren Stegteil (58, 89) an ihrem anderen Ende angelenkt ist.
6. Trennschalter nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß das bewegbare Stegteil (58) käfigförmig ausgebildet den bewegbaren Nulleiterkontakt (20) umgreift, derart, daß bei Lösung die Stange (70) über das bewegliche Stegteil (58) den bewegbaren Nulleiterkontakt mitziehen kann.
7. Trennschalter nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Stange (70) zum Mitziehen des bewegbaren Nulleiterkontaktes (20) beim Lösen einen Anschlag (107) aufweist.
8. Trennschalter nach einem der Ansprüche 1 bis 5 und 7, dadurch gekennzeichnet, daß der bewegbare Nulleiterkontakt (20) quer zu dem Joch (81) eines Magnetkreises verläuft, dessen Anker (82) er trägt.
9. Trennschalter nach Anspruch 8, dadurch gekennzeichnet, daß das Joch (81) mindestens über einen Abschnitt seiner Längserstreckung ein U-förmiges Profil aufweist mit zwei Schenkeln (83, 83') und einer Grundplatte (84), daß der bewegbare Nulleiterkontakt (20) sich zumindest teilweise zwischen den Schenkeln des Joches (81) erstreckt, und daß der Anker (82) seitlich zum Zusammenwirken mit denselben übersteht.
10. Trennschalter nach den Ansprüchen 7 und 9, zusammengenommen, dadurch gekennzeichnet, daß der Anschlag (107) der Stange (70) einen bogenförmigen Ausschnitt (106) der Stange (70) begrenzt, in welchen der durch den bewegbaren Nulleiterkontakt (20) getragene Anker (82) eingreift.
11. Trennschalter nach einem der Ansprüche 4, 5 oder 6, dadurch gekennzeichnet, daß das bewegbare Stegteil (89) ein an der Stange (70) und an dem Gehäuse (10) angelenkter Hebel ist.
12. Trennschalter nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß an dem Schließ- und Lösebetätigungsgriff (35) ein Schwingarm (100) angelenkt ist, dessen Ende (103) frei ist und sich in Nachbarschaft zu dem bewegbaren Phasenkontakt (15) erstreckt zur Einwirkung auf denselben.
EP19810402004 1980-12-16 1981-12-15 Schalter mit Trennung des Nulleiters Expired EP0054499B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8026640A FR2496335A1 (fr) 1980-12-16 1980-12-16 Disjoncteur a sectionnement de neutre
FR8026640 1980-12-16
FR8108403A FR2504725A1 (fr) 1981-04-28 1981-04-28 Disjoncteur a sectionnement de neutre
FR8108403 1981-04-28

Publications (2)

Publication Number Publication Date
EP0054499A1 EP0054499A1 (de) 1982-06-23
EP0054499B1 true EP0054499B1 (de) 1984-06-13

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EP19810402004 Expired EP0054499B1 (de) 1980-12-16 1981-12-15 Schalter mit Trennung des Nulleiters

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DE (1) DE3164236D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3242062A1 (de) * 1982-11-13 1984-05-17 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer schalter
DE4329100A1 (de) * 1992-10-08 1994-04-14 Abb Patent Gmbh Elektrischer Schalter
DE4307811A1 (de) * 1993-03-12 1994-09-15 Abb Patent Gmbh Elektrisches Schaltgerät
DE19503530B4 (de) * 1995-02-03 2006-07-06 Aeg Niederspannungstechnik Gmbh & Co Kg Leitungsschutzschalter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE674919C (de) * 1937-07-25 1939-04-25 Aeg Selbstschalter mit einem beim Abschalten hinter den Hauptkontakten nacheilenden Kontakt
DE672681C (de) * 1937-11-28 1939-03-08 Siemens Schuckertwerke Akt Ges Elektrischer Schalter, insbesondere Kleinselbstschalter der Sockelbauart, mit abschaltbarem Nulleiter
DE1538457B2 (de) * 1966-08-11 1971-02-25 Ellenberger & Poensgen Gmbh, 8503 Altdorf Druckknopfbetaetigter ueberstromschalter
FR2226745B2 (de) * 1973-04-19 1978-03-03 Legrand Sa
FR2409592A1 (fr) * 1977-11-21 1979-06-15 Legrand Sa Module disjoncteur et module differentiel pour disjoncteur differentiel

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DE3164236D1 (en) 1984-07-19
EP0054499A1 (de) 1982-06-23

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