EP0144799B1 - Protection switch - Google Patents

Protection switch Download PDF

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Publication number
EP0144799B1
EP0144799B1 EP84113549A EP84113549A EP0144799B1 EP 0144799 B1 EP0144799 B1 EP 0144799B1 EP 84113549 A EP84113549 A EP 84113549A EP 84113549 A EP84113549 A EP 84113549A EP 0144799 B1 EP0144799 B1 EP 0144799B1
Authority
EP
European Patent Office
Prior art keywords
lever
switch
leg
breaker
automatic cut
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
EP84113549A
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German (de)
French (fr)
Other versions
EP0144799A2 (en
EP0144799A3 (en
Inventor
Rolf Ing. Grad. Goehle
Erhard Ing. Grad. Runtsch
Volker Schmitt
Walter Ing. Grad. Velten
Klaus Dipl.-Ing. Greefe
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
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 Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT84113549T priority Critical patent/ATE27205T1/en
Publication of EP0144799A2 publication Critical patent/EP0144799A2/en
Publication of EP0144799A3 publication Critical patent/EP0144799A3/en
Application granted granted Critical
Publication of EP0144799B1 publication Critical patent/EP0144799B1/en
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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever

Definitions

  • the invention relates to a circuit breaker according to the preamble of claim 1.
  • Such miniature circuit breakers are used in a wide variety, and their switching and operating principle has remained essentially unchanged to this day.
  • switchgear there are two tasks that are closely linked: You try to reduce the size without sacrificing performance, or you keep the size or reduce it slightly and try the switching capacity to enlarge.
  • a circuit breaker of the type mentioned above is e.g. become known from DE-A-3 226 820. Its intermediate lever runs approximately perpendicular to the direction of movement of the magnet armature, which is why the latch lever and thus the elongated hole also runs transversely to the direction of movement of the magnet armature.
  • the low construction then means that parts of the key switch and the thermal release come to rest in the area of the contact point.
  • the object of the invention is to provide a circuit breaker of the type mentioned, in which the overall height has not increased despite increased performance and in which a spatial separation of important switch components and the thermal release from the contact point is made possible.
  • the course of the intermediate lever that drives the contact lever is important for the low overall height; in the switch of DE-A-3 226 820 it runs perpendicular to it in front of the magnet armature, whereas in the switch according to the invention it lies parallel to the front front wall above the magnetic trigger.
  • the movement of all the parts forming the switching lock and the associated necessary components are essentially parallel to the front front wall and also parallel to the longitudinal axis of the magnet yoke or direction of movement of the magnet armature.
  • Those parts that run transversely to it are the contact lever lying in front of the magnetic yoke perpendicular to its central axis and the thermobimetal also running approximately transversely to the central axis of the magnetic release on the opposite side of the magnetic release.
  • the magnetic yoke is surrounded on one side by the contact lever, above it by the key switch and on the other side by the bimetal; all of these parts run in a U-shape around the magnetic yoke and the arc quenching plate package.
  • the configuration according to the invention it was therefore possible for the first time to build the arc-quenching plate package as large as possible and the switch lock as small as possible, specifically in a direction transverse to the front front wall.
  • the construction size or height transverse to the front front wall of the housing is decisive, since this size determines the installation dimension of the switch.
  • the arc-quenching plate unit or arc-quenching plate package takes up approximately half the interior space of the housing in the direction perpendicular to the front wall, whereas the key switch requires a height of less than 25% of this clear height of the housing.
  • the switch lock can be prefabricated in its entirety, so that it forms a unit and can be easily inserted into the housing. This is achieved by the configuration according to claim 4.
  • Terminals 11 and 12 are located on the narrow sides of the base in a housing 10, which is of narrow construction and has a base-like shape.
  • the terminal lug 13 belonging to the terminal 12 extends into the interior of the housing 10 into a bend 14 to which a strand 15 is attached is.
  • the other end of the strand 15 is attached to a contact lever 16, which is designed as a double arm lever.
  • a bevel 16a is formed on the double-arm contact lever 16, in which an elongated hole 18 is introduced with its longitudinal extension approximately transversely to the longitudinal extension of the contact lever 16, through which an axis 17 attached to two plates 19 extends and thus guides the contact lever 16.
  • Fig. 1 only the rear board is partially and the front board only to the left of a board holder (see below).
  • the boards 19 are, as indicated by dashed lines in FIG. 1, formed L-shaped in the contour; the longer leg 20 of the board 19 carries, which is not shown, the axis 21 of a movable shift knob 22, whereas the short leg 23 carries the axis 17.
  • the one lower board is bent in an L-shaped manner, with pin projections 24 being provided on the edge of the leg that projects perpendicular to the plane of the drawing, which engage in holes 25 of the other front board and are fixed there by means of deformations 26.
  • the front board is fastened to the rear board, on which the pin projections 24 are formed. Both boards surround the entire switch lock like a fork, the structure of which is explained in more detail below.
  • the contact lever 16 thus has a first arm 27 to which the movable contact piece 28 and the strand 15 are attached; on the other arm 29, an intermediate lever 31 is articulated via a hinge axis 30, the free end of which engages or guides a web 32 of a C-shaped bracket 33, which web 32 is additionally guided in an elongated hole 34 in a ratchet lever 35.
  • the pawl lever 35 is rotatably supported at point 36.
  • the other web of the bracket 33 which is made of wire, passes through a bore 22a in a shape 22b of the switching knob 22.
  • a nose 37 is attached, which engages in a recess (not shown) on a release lever 38 and forms the latching point there with the latter.
  • the trigger lever 38 is also rotatably mounted on the axis 21.
  • a transmission slide 39 runs approximately parallel to the elongated hole 34 and is guided displaceably in its longitudinal direction in a groove 40 in the housing 10.
  • thermal release 41 in the form of a thermal bimetal and a double arm lever (transmission lever) 42, whose function will be explained in more detail below, runs approximately perpendicular to the slide.
  • a magnetic release 43 is arranged below the switch lock, the axis of the magnetic release 43 likewise running parallel to the front wall 10A and to the connecting line of the hinge axes 30, 36, 32 and the elongated hole 34 and the slide 39.
  • the known magnetic trigger has a movable magnet armature 44 and a magnetic core 45, the magnetic core 45 being penetrated by a plunger 46 which ends in a plunger head 47 which, when tightened in the direction of the arrow F, hits the arm 27 of the contact lever 16 and the contact lever 16 opens.
  • the magnet armature 44 continues into a pin 48 with a plate-like extension 49, which cooperates with one leg of the transmission lever 42; this lever 50 is articulated on the yoke 51 of the magnetic release.
  • the yoke 51 is U-shaped, with one leg of the yoke 51 running approximately parallel to the contact lever 16.
  • an extension 53 is formed, which itself is again U-shaped, on the lower web 54 of which a web 55 is angled, to which the thermal release 41 is attached.
  • the extension 53 and the web 55 are Y-shaped.
  • An adjusting screw 56 is arranged between the two legs of the U-shaped extension 53, the end of which is supported on the inner surface of the left leg 57A, whereas the adjusting screw 56 is screwed into the other leg 57.
  • Both legs 57, 57A are at a minimum distance when the adjusting screw 56 is unscrewed.
  • the legs 57, 57A are pressed apart by the adjusting screw 56, and when the adjusting screw 56 is turned, the distance between the two legs 57 and 57A is widened or reduced, so that the thermal release can be adjusted in this way.
  • a strand 58 is attached, the other end of which is attached to a connecting tab 59.
  • arc-quenching plate packet 60 which is delimited by a first arc-guiding rail 61 and an arc-guiding plate 62.
  • the arc light sheet 61 continues to the left in a U-shaped horn 63, the free leg of which carries the fixed contact piece 64.
  • the light arc 62 connects to the terminal lug 13 and is arc-shaped, which improves the arc running.
  • the plunger head 47 of the plunger 46 is moved in the direction of the arrow F via the magnet armature, as a result of which the movable contact lever 16 is brought into the open position.
  • the slide 39 is moved to the right, as a result of which the release on the nose 37 is released and the contact lever is rotated clockwise under the pressure of the spring 65.
  • the bracket 33 is moved to the right via the intermediate lever 31, as a result of which the switching knob 22 rotates counterclockwise into the switched-off position, and the movable contact lever 16 is held in the open position.
  • the key switch has thus opened the contact points permanently.
  • the thermal release 41 responds, for example in the event of an overcurrent, then it bends counterclockwise F in a clockwise direction around its attachment point, as a result of which the slide 39 is moved to the right and the latching point is released with the nose 37. This also opens the switch permanently.
  • the switch lock is connected to the switch toggle 22 and the contact lever 16 and, via the wire 15, also to the left terminal 12 to form a unit which can be pre-assembled and inserted uniformly into the switch housing.
  • FIG. 2 shows that the arrangement of the magnetic release, thermal release and connection terminal 11 also forms a unit that can be built into the housing of an electrical circuit breaker.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Saccharide Compounds (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Glass Compositions (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Burglar Alarm Systems (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

1. Automatic cut-out having an electromagnetic breaker (43) with a magnetic armature (44), a thermal breaker (41), a fixed and a movable contact piece (64, 28), a switch latch which can be released by the thermal and magnetic breaker (41, 43) and which has a latching point formed by a release lever (38) and a pawl lever (35) rotatably mounted fixed in place and having a slot (34) for guiding a shackle (33), the magnet armature exerting an opening action directly on the movable contact piece and the switch latch opening the movable contact piece permanently, with a switch handle (22) projecting from the front wall of the housing intended for the manual actuation of the switch latch, and with an intermediate lever (31) which is articulated at its one end on the contact lever (16) and at its other end on one leg of the shackle (33) and which engages into the slot (34) with this leg, the other leg of the shackle (33) being articulated on the switch handle (22), characterized in that the intermediate lever (31), the pawl lever (35) and the slot (34) are guided so as to extend approximately parallel to the front wall (10A) and parallel to the side walls of the housing (10), and in that the release lever (38) is mounted, together with the switch handle (22), on an axle (21) fixed in place.

Description

Die Erfindung betrifft einen Leitungsschutzschalter gemäss dem Oberbegriff des Anspruches 1.The invention relates to a circuit breaker according to the preamble of claim 1.

Derartige Leitungsschutzschalter werden in grosser Vielfalt eingesetzt, und ihr Schalt- und Wirkungsprinzip ist bis heute im wesentlichen unverändert beibehalten worden. Bei der Entwicklung neuer Schaltgeräte stellen sich zwei Aufgaben, die eng miteinander verknüpft sind: Man versucht, die Baugrösse zu verkleinern, ohne dabei aber eine Leistungseinbusse hinnehmen zu müssen, oder aber man behält die Baugrösse bei oder verringert sie nur geringfügig und versucht, die Schaltleistung zu vergrössern. Im Prinzip kommt es dabei darauf an, die Lichtbogenlöscheinrichtung in Form eines Lichtbogenlöschblechpaketes möglichst gross, d.h. mit möglichst vielen Löschblechen, auszuführen, und die Baugrösse des Schaltschlosses zu verkleinern, wenn man bei erhöhter Leistung die gleiche Bauhöhe bzw. Baugrösse erreichen will.Such miniature circuit breakers are used in a wide variety, and their switching and operating principle has remained essentially unchanged to this day. When developing new switchgear, there are two tasks that are closely linked: You try to reduce the size without sacrificing performance, or you keep the size or reduce it slightly and try the switching capacity to enlarge. In principle, it is important to make the arc quenching device in the form of an arc quenching plate package as large as possible, i.e. with as many quenching plates as possible, and to reduce the size of the key switch if you want to achieve the same overall height or size with increased performance.

Bei derAusführung nach den Unterlagen des DE-U-7 500 060 ist dies nur bedingt gelungen; das Schaltschloss nimmthöhenmässig wenig Raum ein; dies ist aber damit erkauft worden, dass ein Teil des Schaltschlosses praktisch mit in die Löschkammern hineinragt.In the execution according to the documents of DE-U-7 500 060, this was only partially successful; the key switch takes up little space in terms of height; however, this was bought with the fact that a part of the key switch practically protrudes into the arcing chambers.

Aus der DE-A-2 943 695 ist ein Schaltschloss bekannt geworden, dessen Bauhöhe ebenfalls relativ gering ist; hierbei kommt noch als Vorteil hinzu, dass das Schaltschloss zusammen mit dem beweglichen Kontakthebel zwischen zwei eine Einheit bildenden Platinen angeordnet ist, die Baugrösse ist ähnlich dem Schalter gemäss dem DE-U-7 500 060.From DE-A-2 943 695 a switch lock has become known, the overall height of which is also relatively low; Another advantage here is that the switch lock, together with the movable contact lever, is arranged between two circuit boards forming a unit; the size is similar to the switch according to DE-U-7 500 060.

Eine Vergrösserung der Schaltleistung bei gleicher Bauhöhe wurde gemäss der EP-A-0 009 156 durch eine zusätzliche Blasschleife im Bereich der Kontaktstelle erreicht, nicht aber durch eine geeignete Zuordnung des Schaltschlosses zu dem Lichtbogenlöschblechpaket.According to EP-A-0 009 156, an increase in the switching capacity with the same overall height was achieved by an additional blowing loop in the area of the contact point, but not by a suitable assignment of the switching lock to the arc-quenching plate package.

Aus der CH-A-483 114 ist ein Schaltschloss bekannt geworden, das eine gedrungene Bauweise aufweist, so dass es auf kleinem Raum untergebracht werden kann. Wegen der Zuordnung der einzelnen Hebelelemente zueinander benötigt dieses Schaltschloss dennoch relativ viel Raum, und zwar insbesondere wegen eines Getriebezuges zwischen dem Kontakthebel und dem Schalthebel und des Klinkenhebels.From CH-A-483 114 a key switch has become known, which has a compact construction, so that it can be accommodated in a small space. Because of the assignment of the individual lever elements to one another, this switching lock still requires a relatively large amount of space, in particular because of a gear train between the contact lever and the switching lever and the ratchet lever.

Ein Leitungsschutzschalter der eingangs genannten Art ist z.B. aus der DE-A-3 226 820 bekannt geworden. Dessen Zwischenhebel verläuft etwa senkrecht zur Bewegungsrichtung des Magnetankers, weswegen der Klinkenhebel und damit das Langloch ebenfalls quer zur Bewegungsrichtung des Magnetankers verläuft. Die niedrige Bauweise bedingt dann, dass Teile des Schaltschlosses und der thermische Auslöser im Bereich der Kontaktstelle zu liegen kommen.A circuit breaker of the type mentioned above is e.g. become known from DE-A-3 226 820. Its intermediate lever runs approximately perpendicular to the direction of movement of the magnet armature, which is why the latch lever and thus the elongated hole also runs transversely to the direction of movement of the magnet armature. The low construction then means that parts of the key switch and the thermal release come to rest in the area of the contact point.

Aufgabe der Erfindung ist es, einen Leitungsschutzschalterder eingangs genannten Art zu schaffen, bei dem trotz erhöhter Leistung die Bauhöhe nicht grösser geworden und bei dem eine räumliche Trennung wichtiger Schaltschlossteile und des thermischen Auslösers von der Kontaktstelle ermöglicht ist.The object of the invention is to provide a circuit breaker of the type mentioned, in which the overall height has not increased despite increased performance and in which a spatial separation of important switch components and the thermal release from the contact point is made possible.

Diese Aufgabe wird erfindungsgemäss gelöst durch die kennzeichnenden Merkmale des Anspruches 1.According to the invention, this object is achieved by the characterizing features of claim 1.

Bei der erfindungsgemässen Ausführung wird die Bauhöhe des Schalters im wesentlichen durch das Lichtbogenlöschblechpaket und durch die Baugrösse des Magnetauslösers bestimmt. Die Höhe des Schaltschlosses ist gering gehalten, weil praktisch alle das Schaltschloss bildenden Teile bzw. Komponenten annähernd parallel zur vorderen, den Schaltknebel enthaltenden Frontwand ausgerichtet sind:

  • Der Zwischenhebel zwischen dem Kontakthebel und dem Klinkenhebel bzw. Schaltknebel verschiebt sich im wesentlichen parallel zur Frontplatte in seiner eigenen Längserstreckung aufgrund der erfindungsgemässen Anordnung des Langloches; dies hat zur Folge, dass der Klinkenhebel im wesentlichen eine Längserstreckung ebenfalls parallel zur Frontwand aufweist, wodurch die Erstreckung des Klinkenhebels quer zu dieser Richtung sehr klein gehalten werden kann. Im Gegensatz hierzu verlaufen die Verbindungslinie zwischen Verklinkungsstelle und Lagerpunkt des Klinkenhebels ebenso wie das Langloch bei dem Schalter der DE-A-3 226 820 deutlich schräg, ca. unter einem Winkel von 45°, zur vorderen Frontwand.
In the embodiment according to the invention, the overall height of the switch is essentially determined by the arc quenching plate package and by the size of the magnetic release. The height of the switch lock is kept low because practically all parts or components forming the switch lock are aligned approximately parallel to the front wall containing the switch knob:
  • The intermediate lever between the contact lever and the ratchet lever or shift toggle shifts essentially parallel to the front plate in its own longitudinal extent due to the arrangement of the elongated hole according to the invention; this has the consequence that the pawl lever also has a substantially longitudinal extent parallel to the front wall, so that the extent of the pawl lever transverse to this direction can be kept very small. In contrast to this, the connecting line between the latching point and the bearing point of the latch lever as well as the elongated hole in the switch of DE-A-3 226 820 run clearly obliquely, approximately at an angle of 45 °, to the front front wall.

Durch die Auflagerung des Auslösehebels am Schaltknebel kann eine zusätzliche Lagerstelle für den Auslösehebel eingespart werden, so dass auch hierdurch eine Verkleinerung der Höhe des Schaltschlosses in Richtung quer zur Frontwand erreicht werden kann.By mounting the release lever on the switch toggle, an additional bearing point for the release lever can be saved, so that the height of the switch lock in the direction transverse to the front wall can also be reduced.

Wichtig für die geringe Bauhöhe ist der Verlauf des Zwischenhebels, der den Kontakthebel antreibt; bei dem Schalter der DE-A-3 226 820 verläuft er vor dem Magnetanker senkrecht dazu, wogegen er bei dem erfindungsgemässen Schalter oberhalb des Magnetauslösers parallel zur vorderen Frontwand liegt.The course of the intermediate lever that drives the contact lever is important for the low overall height; in the switch of DE-A-3 226 820 it runs perpendicular to it in front of the magnet armature, whereas in the switch according to the invention it lies parallel to the front front wall above the magnetic trigger.

Zusätzlich hat einen wesentlichen Einfluss auf die Bauhöhe die Führung des Übertragungsschiebers zur Übertragung der Bewegung des Schlagankers und des Thermobimetalls auf den Auslösehebel gemäss Anspruch 2.In addition, the guidance of the transmission slide for transmitting the movement of the impact anchor and the thermobimetal to the release lever has a significant influence on the overall height.

Damit verläuft die Bewegung aller das Schaltschloss bildenden Teile und der damit in Verbindung stehenden notwendigen Komponenten im wesentlichen parallel zur vorderen Frontwand und auch parallel zur Längsachse des Magnetjoches bzw. Bewegungsrichtung des Magnetankers. Diejenigen Teile, die quer dazu verlaufen, sind der vor dem Magnetjoch senkrecht zu dessen Mittelachse liegende Kontakthebel und das auf der gegenüberliegenden Seite des Magnetauslösers ebenfalls annähernd quer zur Mittelachse des Magnetauslösers verlaufende Thermobimetall. Damit ist das Magnetjoch auf der einen Seite vom Kontakthebel, darüberliegend vom Schaltschloss und auf der anderen Seite vom Thermobimetall umgeben; alle diese Teile verlaufen U-förmig um das Magnetjoch und das Lichtbogenlöschblechpaket herum.Thus, the movement of all the parts forming the switching lock and the associated necessary components are essentially parallel to the front front wall and also parallel to the longitudinal axis of the magnet yoke or direction of movement of the magnet armature. Those parts that run transversely to it are the contact lever lying in front of the magnetic yoke perpendicular to its central axis and the thermobimetal also running approximately transversely to the central axis of the magnetic release on the opposite side of the magnetic release. This means that the magnetic yoke is surrounded on one side by the contact lever, above it by the key switch and on the other side by the bimetal; all of these parts run in a U-shape around the magnetic yoke and the arc quenching plate package.

Aufgrund der erfindungsgemässen Ausgestaltung also war es erstmals möglich, das Lichtbogenlöschblechpaket möglichst gross und das Schaltschloss möglichst klein zu bauen und zwar bezogen auf eine Richtung quer zur vorderen Frontwand. Die Baugrösse bzw. -höhe quer zur vorderen Frontwand des Gehäuses ist bestimmend, da diese Baugrösse das Einbaumass des Schalters bestimmt. Die Lichtbogenlöschblecheinheit oder das Lichtbogenlöschblechpaket nimmt annähernd die Hälfte des Innenraumes des Gehäuses in der Richtung ein, die senkrecht zur Frontwand verläuft, wogegen das Schaltschloss eine Höhe von weniger als 25% dieser lichten Höhe des Gehäuses erfordert.Because of the configuration according to the invention, it was therefore possible for the first time to build the arc-quenching plate package as large as possible and the switch lock as small as possible, specifically in a direction transverse to the front front wall. The construction size or height transverse to the front front wall of the housing is decisive, since this size determines the installation dimension of the switch. The arc-quenching plate unit or arc-quenching plate package takes up approximately half the interior space of the housing in the direction perpendicular to the front wall, whereas the key switch requires a height of less than 25% of this clear height of the housing.

Zusätzlich ist noch zu sagen, dass das Schaltschloss in seiner Gesamtheit vorgefertigt werden kann, so dass es, eine Einheit bildend, einfach in das Gehäuse einsetzbar ist. Dies wird erreicht durch die Ausgestaltung gemäss Anspruch 4.In addition, it should also be said that the switch lock can be prefabricated in its entirety, so that it forms a unit and can be easily inserted into the housing. This is achieved by the configuration according to claim 4.

Eine Vereinfachung der Montage des thermischen Auslösers ist aus den kennzeichnenden Merkmalen der Ansprüche 5 und 6 zu ersehen, wobei zusätzlich noch gemäss Anspruch 6 die Justierung mit integriert ist, was zu einer Vereinfachung bei der Justierung führt.A simplification of the assembly of the thermal release can be seen from the characterizing features of claims 5 and 6, the adjustment being additionally integrated according to claim 6, which leads to a simplification in the adjustment.

Weitere Ausgestaltungen und Verbesserungen sind den weiteren Unteransprüchen zu entnehmen.Further refinements and improvements can be found in the further subclaims.

Anhand der Zeichnung, in der ein Ausführungsbeispiel eines erfindungsgemässen Schalters dargestellt ist, soll die Erfindung näher erläutert und beschrieben werden.The invention is to be explained and described in more detail with reference to the drawing, in which an exemplary embodiment of a switch according to the invention is shown.

Es zeigt:

  • Fig. 1 eine Einsicht in einen erfindungsgemässen Schalter,
  • Fig. 2 ein Detail des Schalters nach Fig. 1.
It shows:
  • 1 is an insight into a switch according to the invention,
  • FIG. 2 shows a detail of the switch according to FIG. 1.

In einem Gehäuse 10, das in Schmalbauweise und sockelförmig ausgebildet ist, befinden sich an den Schmalseiten im Sockel Klemmen 11 und 12. Die der Klemme 12 zugehörige Anschlussfahne 13 verlängert sich ins Innere des Gehäuses 10 in eine Abwinkelung 14, an der eine Litze 15 befestigt ist. Das andere Ende der Litze 15 ist an einem Kontakthebel 16 befestigt, derals Doppelarmhebel ausgebildet ist. An dem Doppelarm-Kontakthebel 16 isteine Abkantung 16a angeformt, in der ein Langloch 18 mit seiner Längserstreckung etwa quer zur Längserstreckung des Kontakthebels 16, durch das eine an zwei Platinen 19 angebrachte Achse 17 hindurchgreift und so den Kontakthebel 16 führt, eingebracht ist. In der Fig. 1 ist nur die hintere Platine teilweise und die vordere Platine nur links von einer Platinenhalterung (siehe unten) zu sehen. Die Platinen 19 sind, wie aus der Fig. 1 strichliert gekennzeichnet ersichtlich, in der Kontur L-förmig ausgebildet; der längere Schenkel 20 der Platine 19 trägt, was nicht dargestellt ist, die Achse 21 eines bewegbaren Schaltknebels 22, wogegen der kurze Schenkel 23 die Achse 17 trägt. Die eine untere Platine ist in sich L-förmig abgekantet, wobei auf der Kante des Schenkels, der senkrecht zur Zeichenebene vorspringt, Zapfenvorsprünge 24 vorgesehen sind, die in Löcher 25 der anderen vorderen Platine eingreifen und dort mittels Verformungen 26 fixiert sind. An der hinteren Platine also, an der die Zapfenvorsprünge 24 angeformt sind, ist die vordere Platine befestigt. Beide Platinen umgeben gabelartig das gesamte Schaltschloss, dessen Aufbau weiter unten näher erläutert ist.Terminals 11 and 12 are located on the narrow sides of the base in a housing 10, which is of narrow construction and has a base-like shape. The terminal lug 13 belonging to the terminal 12 extends into the interior of the housing 10 into a bend 14 to which a strand 15 is attached is. The other end of the strand 15 is attached to a contact lever 16, which is designed as a double arm lever. A bevel 16a is formed on the double-arm contact lever 16, in which an elongated hole 18 is introduced with its longitudinal extension approximately transversely to the longitudinal extension of the contact lever 16, through which an axis 17 attached to two plates 19 extends and thus guides the contact lever 16. In Fig. 1 only the rear board is partially and the front board only to the left of a board holder (see below). The boards 19 are, as indicated by dashed lines in FIG. 1, formed L-shaped in the contour; the longer leg 20 of the board 19 carries, which is not shown, the axis 21 of a movable shift knob 22, whereas the short leg 23 carries the axis 17. The one lower board is bent in an L-shaped manner, with pin projections 24 being provided on the edge of the leg that projects perpendicular to the plane of the drawing, which engage in holes 25 of the other front board and are fixed there by means of deformations 26. The front board is fastened to the rear board, on which the pin projections 24 are formed. Both boards surround the entire switch lock like a fork, the structure of which is explained in more detail below.

Der Kontakthebel 16 besitzt also einen ersten Arm 27, an dem das bewegliche Kontaktstück 28 und die Litze 15 befestigt sind; am anderen Arm 29 ist über eine Gelenkachse 30 ein Zwischenhebel 31 angelenkt, dessen freies Ende einen Steg 32 eines C-förmigen Bügels 33 umgreift bzw. führt, welcher Steg 32 zusätzlich in einem Langloch 34 in einem Klinkenhebel 35 geführt ist. Der Klinkenhebel 35 ist dabei an der Stelle 36 drehbar ortsfest aufgelagert. Der andere Steg des aus Draht bestehenden Bügels 33 durchgreift eine Bohrung 22a an einer Ausformung 22b des Schaltknebels 22.The contact lever 16 thus has a first arm 27 to which the movable contact piece 28 and the strand 15 are attached; on the other arm 29, an intermediate lever 31 is articulated via a hinge axis 30, the free end of which engages or guides a web 32 of a C-shaped bracket 33, which web 32 is additionally guided in an elongated hole 34 in a ratchet lever 35. The pawl lever 35 is rotatably supported at point 36. The other web of the bracket 33, which is made of wire, passes through a bore 22a in a shape 22b of the switching knob 22.

Am Klinkenhebel 35 ist eine Nase 37 angebracht, die in eine Ausnehmung (nicht gezeigt) an einem Auslösehebel 38 eingreift und dort die Verklinkungsstelle mit diesem bildet. Der Auslösehebel 38 ist ebenfalls auf der Achse 21 drehbar gelagert.On the latch lever 35, a nose 37 is attached, which engages in a recess (not shown) on a release lever 38 and forms the latching point there with the latter. The trigger lever 38 is also rotatably mounted on the axis 21.

Während der Zwischenhebel 31 und der Klinkenhebel 35 angenähert in einer Linie liegen, wobei die Gelenkachsen 30, 36, 32 und das Langloch 34 etwa miteinander fluchten und parallel zur Frontwand 10A des Gehäuses 10 verlaufen, ist der bewegliche Kontakthebei 16 senkrecht dazu angeordnet, ebenso der Auslösehebel 38.While the intermediate lever 31 and the ratchet lever 35 lie approximately in a line, the hinge axes 30, 36, 32 and the elongated hole 34 being approximately aligned with one another and running parallel to the front wall 10A of the housing 10, the movable contact lever 16 is arranged perpendicularly thereto, as is the Release lever 38.

Annähernd parallel zu dem Langloch 34 verläuft ein Übertragungsschieber 39, der in einer Nut 40 im Gehäuse 10 in seiner Längsrichtung verschiebbar geführt ist.A transmission slide 39 runs approximately parallel to the elongated hole 34 and is guided displaceably in its longitudinal direction in a groove 40 in the housing 10.

Annähernd senkrecht zu dem Schieber verläuft ein thermischer Auslöser 41 (Thermoauslöser 41) in Form eines Thermobimetalls und ein Doppelarmhebel (Übertragungshebel) 42, dessen Funktion weiter unten näher erläutert werden soll.A thermal release 41 (thermal release 41) in the form of a thermal bimetal and a double arm lever (transmission lever) 42, whose function will be explained in more detail below, runs approximately perpendicular to the slide.

Unterhalb des Schaltschlosses ist ein Magnetauslöser 43 angeordnet, wobei die Achse des Magnetauslösers 43 ebenfalls parallel zur Frontwand 10A und zur Verbindungslinie der Gelenkachsen 30, 36, 32 und dem Langloch 34 sowie dem Schieber 39 verläuft.A magnetic release 43 is arranged below the switch lock, the axis of the magnetic release 43 likewise running parallel to the front wall 10A and to the connecting line of the hinge axes 30, 36, 32 and the elongated hole 34 and the slide 39.

Der an sich bekannte Magnetauslöser besitzt einen bewegbaren Magnetanker 44 und einen Magnetkern 45, wobei der Magnetkern 45 von einem Stössel 46 durchdrungen ist, der in einem Stösselkopf 47 endet, der beim Anziehen in Pfeilrichtung F auf den Arm 27 des Kontakthebels 16 aufschlägt und den Kontakthebel 16 öffnet. Auf der gegenüberliegenden Seite setzt sich der Magnetanker 44 fort in einen Zapfen 48 mit einer tellerartigen Erweiterung 49, die mit einem Schenkel des Übertragungshebels 42 zusammenwirkt; dieser Hebel 50 ist an dem Joch 51 des Magnetauslösers angelenkt. Das Joch 51 ist U-förmig ausgebildet, wobei der eine Schenkel des Joches 51 annähernd parallel zum Kontakthebel 16 verläuft. An dem gegenüberliegenden Jochschenkel 52, der den Magnetanker 44 umfasst, ist eine Verlängerung 53 angeformt, der selbst wieder U-förmig ausgebildet ist, an dessen unterem Steg 54 ein Steg 55 abgewinkelt ist, an dem der Thermoauslöser 41 befestigt ist. Die Verlängerung 53 und der Steg 55 sind Y-förmig gestaltet. Zwischen den beiden Schenkeln der U-förmigen Verlängerung 53 ist eine Justierschraube 56 angeordnet, deren Ende sich an der Innenfläche des linken Schenkels 57A abstützt, wogegen die Justierschraube 56 im anderen Schenkel 57 eingeschraubt ist. Beide Schenkel 57, 57A nehmen einen Mindestabstand ein, wenn die Justierschraube 56 ausgeschraubt ist. Die Schenkel 57, 57A werden durch die Justierschraube 56 auseinandergedrückt, und bei Verdrehen der Justierschraube 56 wird der Abstand zwischen den beiden Schenkeln 57 und 57A erweitert oder verringert, so dass auf diese Weise der Thermoauslöser justiert werden kann.The known magnetic trigger has a movable magnet armature 44 and a magnetic core 45, the magnetic core 45 being penetrated by a plunger 46 which ends in a plunger head 47 which, when tightened in the direction of the arrow F, hits the arm 27 of the contact lever 16 and the contact lever 16 opens. On the opposite side, the magnet armature 44 continues into a pin 48 with a plate-like extension 49, which cooperates with one leg of the transmission lever 42; this lever 50 is articulated on the yoke 51 of the magnetic release. The yoke 51 is U-shaped, with one leg of the yoke 51 running approximately parallel to the contact lever 16. On the opposite yoke leg 52, which includes the magnet armature 44, an extension 53 is formed, which itself is again U-shaped, on the lower web 54 of which a web 55 is angled, to which the thermal release 41 is attached. The extension 53 and the web 55 are Y-shaped. An adjusting screw 56 is arranged between the two legs of the U-shaped extension 53, the end of which is supported on the inner surface of the left leg 57A, whereas the adjusting screw 56 is screwed into the other leg 57. Both legs 57, 57A are at a minimum distance when the adjusting screw 56 is unscrewed. The legs 57, 57A are pressed apart by the adjusting screw 56, and when the adjusting screw 56 is turned, the distance between the two legs 57 and 57A is widened or reduced, so that the thermal release can be adjusted in this way.

Am gegenüberliegenden Ende des thermischen Auslösers 41, das mit dem Übertragungsschieber 39 zusammenwirkt, ist eine Litze 58 befestigt, deren anderes Ende an einer Anschlussfahne 59 befestigt ist.At the opposite end of the thermal release 41, which cooperates with the transfer slide 39, a strand 58 is attached, the other end of which is attached to a connecting tab 59.

Unterhalb des Magnetauslösers 43 befindet sich ein Lichtbogenlöschblechpaket 60, das von einer ersten Lichtbogenleitschiene 61 und einem Lichtbogenleitblech 62 begrenzt ist. Das Lichtbogenleichtblech 61 setzt sich nach links fort in ein U-förmig gebogenes Horn 63, dessen freier Schenkel das feste Kontaktstück 64 trägt. Das Lichtbogenleichtblech 62 schliesst an die Anschlussfahne 13 an und ist bogenförmig ausgebildet, was eine Verbesserung des Lichtbogenlaufes bewirkt.Below the magnetic release 43 there is an arc-quenching plate packet 60 which is delimited by a first arc-guiding rail 61 and an arc-guiding plate 62. The arc light sheet 61 continues to the left in a U-shaped horn 63, the free leg of which carries the fixed contact piece 64. The light arc 62 connects to the terminal lug 13 and is arc-shaped, which improves the arc running.

Bei einer Schalthandlung wird über den Magnetanker der Stösselkopf 47 des Stössels 46 in Pfeilrichtung F bewegt, wodurch der bewegliche Kontakthebel 16 in Öffnungsstellung verbracht wird. Gleichzeitig wird mittels der Erweiterung 49 des Magnetankers 44 und des Übertragungshebels 42 der Schieber 39 nach rechts bewegt, wodurch die Entklinkung an der Nase 37 gelöst und der Kontakthebel unter dem Druck der Feder 65 im Uhrzeigersinn verdreht wird. Dadurch wird über den Zwischenhebel 31 der Bügel 33 nach rechts bewegt, wodurch sich der Schaltknebel 22 entgegen dem Uhrzeigersinn in Ausschaltstellung verdreht, und der bewegliche Kontakthebel 16 in Offenstellung gehalten wird. Das Schaltschloss hat somit die Kontaktstellen bleibend geöffnet.In the event of a switching operation, the plunger head 47 of the plunger 46 is moved in the direction of the arrow F via the magnet armature, as a result of which the movable contact lever 16 is brought into the open position. At the same time, by means of the extension 49 of the magnet armature 44 and the transmission lever 42, the slide 39 is moved to the right, as a result of which the release on the nose 37 is released and the contact lever is rotated clockwise under the pressure of the spring 65. As a result, the bracket 33 is moved to the right via the intermediate lever 31, as a result of which the switching knob 22 rotates counterclockwise into the switched-off position, and the movable contact lever 16 is held in the open position. The key switch has thus opened the contact points permanently.

Wenn der Thermoauslöser 41 anspricht, beispielsweise bei einem Überstrom, dann biegt dieser sich entgegen der Pfeilrichtung F im Uhrzeigersinn um seine Befestigungsstelle drehend aus, wodurch der Schieber 39 nach rechts bewegt wird und die Verklinkungsstelle mit der Nase 37 gelöst wird. Auch hierdurch wird der Schalter bleibend geöffnet.If the thermal release 41 responds, for example in the event of an overcurrent, then it bends counterclockwise F in a clockwise direction around its attachment point, as a result of which the slide 39 is moved to the right and the latching point is released with the nose 37. This also opens the switch permanently.

Mittels der Platinen 19 wird das Schaltschloss mit dem Schaltknebel 22 und dem Kontakthebel 16 und über die Litze 15 auch mit der linken Klemme 12 zu einer Einheit verbunden, die vormontiert und einheitlich in das Schaltergehäuse eingesetzt werden kann.By means of the circuit boards 19, the switch lock is connected to the switch toggle 22 and the contact lever 16 and, via the wire 15, also to the left terminal 12 to form a unit which can be pre-assembled and inserted uniformly into the switch housing.

Die Fig. 2 zeigt, dass die Anordnung von Magnetauslöser, Thermoauslöser und Anschlussklemme 11, ebenfalls eine Einheit bildet, die zusammenhängend in das Gehäuse eines elektrischen Leitungsschutzschalters eingebaut werden kann.FIG. 2 shows that the arrangement of the magnetic release, thermal release and connection terminal 11 also forms a unit that can be built into the housing of an electrical circuit breaker.

Claims (7)

1. Automatic cut-out having an electromagnetic breaker (43) with a magnetic armature (44), a thermal breaker (41), a fixed and a movable contact piece (64, 28), a switch latch which can be released by the thermal and magnetic breaker (41, 43) and which has a latching point formed by a release lever (38) and a pawl lever (35) rotatably mounted fixed in place and having a slot (34) for guiding a shackle (33), the magnet armature exerting an opening action directly on the movable contact piece and the switch latch opening the movable contact piece permanently, with a switch handle (22) projecting from the front wall of the housing intended for the manual actuation of the switch latch, and with an intermediate lever (31) which is articulated at its one end on the contact lever (16) and at its other end on one leg of the shackle (33) and which engages into the slot (34) with this leg, the other leg of the shackle (33) being articulated on the switch handle (22), characterized in that the intermediate lever (31 ), the pawl lever (35) and the slot (34) are guided so as to extend approximately parallel to the front wall (1 OA) and parallel to the side walls of the housing (10), and in that the release lever (38) is mounted, together with the switch handle (22), on an axle (21) fixed in place.
2. Automatic cut-out according to Claim 1, characterized in that the thermal breaker (41) and the magnet armature (44) are coupled to the release lever (38) by means of a transmission slide (39) for releasing the switch latch, this transmission slide being guided in a guide groove (40) provided in the housing approximately parallel to the front wall and serving for transmitting the movement of both the thermal breaker (41) and the magnet armature (44) to the release lever (38).
3. Automatic cut-out according to Claim 2, characterized in that formed on the magnet yoke of the magnetic breaker is a pivot bearing (50) for a two- armed lever (42) which serves for transmitting the movement of the magnet armature (44) to the transmission slide (39).
4. Automatic cut-out according to one of the preceding claims, characterized in that the contact lever (16), the switch handle (22) and the pawl lever (35) are mounted between two L-shaped plates (19), one leg of the plates (19) receiving the contact-lever axle (17) and the other leg receiving the switch-handle axle (21) and the pawl lever axle (36).
5. Automatic cut-out according to one of the preceding claims, characterized in that the magnet yoke has an extension (53), to the end of which is fastened the thermal breaker (41).
6. Automatic cut-out according to Claim 5, characterized in that the extension (53) is made Y-shaped, the thermal breaker being fastened to its web, and in that for adjustment purposes there is, between the two legs of the extension (57, 57A), an adjusting screw (56) which is guided in an internal thread on one leg (57) and which rests against the inner fase of the other leg, in such a way that it is possible to adjust the thermal breaker by varying the aperture width of the two legs and thereby varying the position of the web (55) in relation to the legs.
7. Automatic cut-out according to one of the preceding claims, characterized in that the arc guide plate (62) carrying the fixed contact piece (14) is arranged in the housing in a curve of large radius without a break.
EP84113549A 1983-11-24 1984-11-09 Protection switch Expired EP0144799B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113549T ATE27205T1 (en) 1983-11-24 1984-11-09 CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3342469 1983-11-24
DE19833342469 DE3342469A1 (en) 1983-11-24 1983-11-24 ELECTRIC SWITCH

Publications (3)

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EP0144799A2 EP0144799A2 (en) 1985-06-19
EP0144799A3 EP0144799A3 (en) 1985-07-10
EP0144799B1 true EP0144799B1 (en) 1987-05-13

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ID=6215132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113549A Expired EP0144799B1 (en) 1983-11-24 1984-11-09 Protection switch

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EP (1) EP0144799B1 (en)
JP (1) JPS60131728A (en)
AT (1) ATE27205T1 (en)
DE (2) DE3342469A1 (en)

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US5499007A (en) * 1993-04-22 1996-03-12 Heinrich Kopp Ag Circuit breaker
AU682429B2 (en) * 1994-03-01 1997-10-02 Heinrich Kopp Ag Circuit breaker
US7839241B2 (en) 2007-05-23 2010-11-23 Abb Ag Electrical service switching device

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CN111710570A (en) * 2020-07-22 2020-09-25 南京贝思特信息科技有限公司 Automatic partition type arc-isolating cover for circuit breaker

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US5499007A (en) * 1993-04-22 1996-03-12 Heinrich Kopp Ag Circuit breaker
AU682429B2 (en) * 1994-03-01 1997-10-02 Heinrich Kopp Ag Circuit breaker
US7839241B2 (en) 2007-05-23 2010-11-23 Abb Ag Electrical service switching device

Also Published As

Publication number Publication date
JPS60131728A (en) 1985-07-13
EP0144799A2 (en) 1985-06-19
DE3463708D1 (en) 1987-06-19
EP0144799A3 (en) 1985-07-10
DE3342469A1 (en) 1985-06-05
ATE27205T1 (en) 1987-05-15

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