EP0656641B1 - Trip unit for circuit breaker or protective switches - Google Patents

Trip unit for circuit breaker or protective switches Download PDF

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Publication number
EP0656641B1
EP0656641B1 EP94118386A EP94118386A EP0656641B1 EP 0656641 B1 EP0656641 B1 EP 0656641B1 EP 94118386 A EP94118386 A EP 94118386A EP 94118386 A EP94118386 A EP 94118386A EP 0656641 B1 EP0656641 B1 EP 0656641B1
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EP
European Patent Office
Prior art keywords
trip
lever
arm
switch
trip unit
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 - Lifetime
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EP94118386A
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German (de)
French (fr)
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EP0656641A3 (en
EP0656641A2 (en
Inventor
Stefan Welker
Volker Heins
Wolfgang Dipl.-Ing. Kutsche
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Eaton Industries GmbH
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Kloeckner Moeller GmbH
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Publication of EP0656641A2 publication Critical patent/EP0656641A2/en
Publication of EP0656641A3 publication Critical patent/EP0656641A3/en
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Publication of EP0656641B1 publication Critical patent/EP0656641B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the invention relates to a trigger unit for a Circuit breaker or circuit breaker, especially as Undervoltage release with the switch drive mechanism interacts in such a way that when there is insufficient tension, the Release unit immediately releases the switch drive mechanism, wherein the trigger unit is designed as a plunger armature coil Trip coil with a by a compression spring in the trip direction loaded, lying in a magnetic storage housing Has trigger plunger.
  • Circuit breaker with an additional protection module are known. This is how EP 0 525 691 describes A1 a switch of this type, in the housing of which a front trip unit designed as a module can be installed.
  • Such protection modules are mostly as undervoltage releases designed, when falling below the to Switch contacts applied voltage of the undervoltage release actuated the switch-off mechanism.
  • the release units known today operate with the help of levers with the switching mechanism of the switch.
  • levers used are relatively bulky and large designed so that a desired compact and small version a trip unit cannot be achieved. So is from the GB-PS 15 58 785 a tripping unit for a circuit breaker or an undervoltage protection switch known.
  • the trigger unit are the levers on two opposite sides attached to the housing, making the levers large and they also have a very complicated shape to manufacture receive.
  • the complicated lever mechanism also works disadvantageous to a quick assembly of the switch and the Trip unit.
  • the invention is therefore based on the object Tripping unit for circuit breakers or circuit breakers type mentioned above, in particular as undervoltage release to be designed so that the release unit in its construction much simplified, reduced in size and the Assembly and manufacturing costs are reduced.
  • the release plunger the trip unit should automatically after each switch off or trigger can be pressed into the magnetic storage housing.
  • the trigger unit according to the invention only has two levers, all for one release unit take on important functions.
  • the state of the art need known release units as well as EP 0 525 691 A2 against it three levers.
  • a reduction means one decisive simplification of the mechanics, reduces the Production effort and production costs and also bears to the functional safety of the trip unit.
  • the trigger plunger automatically in the Magnetic storage case is pressed as soon as the switch triggered or switched off.
  • the invention also describes a control curve, which as Sliding part is designed such that it is the end of one arm of the spring-loaded clamping lever during the switch-on process against the action of a compression spring in one in the housing Press the existing recess and the tension lever around its axis of rotation pivots that the release lever from the clamping lever is released.
  • the control curve is preferably on Control element attached.
  • control curve is on arcuate flat part that in the middle of the flat side has an opening and the opening of the control element encloses that when switching the switch on or off Control element takes the control cam along and around the axis of rotation of the control element moves.
  • control curve is much more stable than that previously used transmission mechanisms between switches and Tripping unit that can be realized with levers.
  • the design of the control curve is accurate and wear-free Power transmission to the tensioning lever of the release unit.
  • the control element position is on the side of the control curve Transfer trigger unit.
  • the recess of the Control curve on one side when switching on the switch cooperates with one end of the tensioning lever, the side is ramped.
  • the interaction between switches and trigger unit determines that a temporally and spatially exact interlocking of tension lever and control cam required.
  • the clamping lever is preferably designed as a two-armed lever and is between the two lever arms by means of a bolt rotatably attached to the housing of the trip unit. At about same length dimensions of the two lever arms of the tensioning lever both arms have the same lifting height at the same twist angle.
  • the arc-shaped, interacting with the release lever Arm of the tensioning lever has an inside Effective area, which is designed so that the arm during the Rotation movement when the switch is turned off the release lever so pressurized that the trigger plunger around his The axis of rotation is pivoted in the direction of the trigger plunger and the Push the tappet all the way into the magnetic storage housing.
  • the trigger lever is a double lever arm, the Connecting bridge of the two lever arms the axis of rotation of the Release lever is.
  • the particular advantage of this double lever shape can be seen in the fact that the connecting bridge through its cylindrical shape is at the same time bearing axis of rotation and in one suitably designed recess in the release housing and so clamped by the corresponding housing cover that the release lever is still about the longitudinal axis of the connecting web can pivot. This means there are no additional ones Bracket parts required.
  • the arm of the trigger lever which cooperates with the tension lever, preferably has at its end a cam which is connected to the Area of action of the tension lever arm interacts.
  • This Cam is a guide of the trigger lever from the effective surface of the clamping lever always guaranteed.
  • the round shape of the cam also contributes to the smooth sliding along the Effective area at.
  • the lever arm of the trigger lever, the one with the trigger plunger and the Switch-off protection mechanism of the switch interacts, points a cam on the side facing away from the trigger plunger, the which holds one end of a compression spring, which preferably as Coil spring is formed.
  • the contact surface of the lever arm with the trigger plunger is also preferably as a rounded Train cams.
  • the axis of rotation of the tensioning lever and the axis of rotation of the release lever should preferably be arranged parallel to each other, whereby a favorable power transmission is guaranteed.
  • the longitudinal axis of the Magnetic storage system and the tension lever longitudinal axis should also be parallel to each other.
  • Another significant advantage of the invention is that exclusive use of compression springs, in particular Coil springs between the housing parts and the levers to store.
  • compression springs in particular Coil springs between the housing parts and the levers to store.
  • the design of the lever and the housing parts enables faster assembly compared to today used tension springs, as these at their ends in corresponding Brackets need to be threaded.
  • Fig. 1 is a preferred embodiment of the trigger unit for Circuit breaker and circuit breaker shown.
  • the housing of the trip unit is made from the mold Base body 23 and the molded cover part 8 formed, the two parts are preferably made of plastic and held together by screws 6.
  • 8 and 23 are in the housing parts Cutouts for the magnetic storage housing 21 with a trigger plunger 20, the release lever 12 and the tensioning lever 1 are present.
  • the trigger unit is in a recess next to the Control element 34 of the switch housing, not shown arranged and acts with the trigger mechanism of the switch via the tension lever 1 and the release lever 12 together.
  • the tension lever 1 which is designed as a rocker, is connected to the bolt 7 rotatably supported in the housing cover part 8. Is located the arm 1a of the tensioning lever 1 inside the housing.
  • the arm 1b is in a slot-shaped recess in the Exterior cover part retractable. The end of slot-shaped recess is connected to a recess 27, in which a compression spring 5, in particular a coil spring lies in.
  • the compression spring 5 is supported with one end the housing cover part 8. The other end of the compression spring 5 held by a cam 4 located on the tension lever arm 1b.
  • the Compression spring 5 pressurizes the tensioning lever 1 such that the Tension lever arm 1b is pushed out of the housing cover 8.
  • Tension lever arm 1b On the side facing away from the housing cover part 8 Tension lever arm 1b is a cam 2 which is at its end is preferably rounded. The tension lever 1 is shaped so that the cam 2 when turning the clamping lever 1 opposite the Spring action of the compression spring 5 in the recess 27 of the Housing cover part lies.
  • the tensioning lever arm 1a is arcuate and has on its arc inside an effective area 3, which with the cylindrical cam 17 of the release lever arm 18 cooperates. Due to the cylindrical shape of the cam 17 and the special shape of the effective area 3, is during the Rotation of the tensioning lever 1, at which the tensioning lever arm 1b is off the housing cover part 8 is pressed out by the compression spring 5, a continuous power transmission from the tension lever arm 1a the cam 17 of the trigger lever arm 18 ensures that the trigger lever 12 is pivoted about its axis of rotation 13 is that the trigger lever arm 14 against the trigger plunger 20th is pivoted and the trigger plunger 20 completely in the Magnetic storage housing 21 presses.
  • the trigger lever 12 is a C-shaped double lever arm with the Lever arms 14 and 18 which are rigid on a connecting web 13 are attached.
  • the trigger lever 12 lies with his Connecting web 13 in a recess in the housing base 23 a, the trigger lever 12 about the longitudinal axis of the Connecting web 13 is rotatable. That’s it cylindrical end 19 of the connecting web 13 in the also cylindrical recess 22 of the Main body 23.
  • the trigger arm 18 is off Stability reasons a disc-shaped segment, on the Connecting web 13 facing away from a cylindrical cam 17 is integrally formed, the cam 17 on the trigger arm 14 facing away from the disk segment side 18a and the facing disc segment side 18a for the tension lever arm 1a a Support surface forms.
  • the trigger lever arm 14 has a cam 16, the one end of a coil spring Compression spring 11 holds, the compression spring 11 the trigger arm 14 presses against the trigger plunger 20.
  • the Release lever arm 14 has an effective area that acts as a cam is formed and cooperates with the trigger plunger 20.
  • On its end facing away from the connecting web 13 has Release lever arm 14 an effective area 15, which also is preferably designed as a cam that does not illustrated switch protection mechanism of the switch cooperates.
  • the compression spring 11 is in a recess of the Housing base body 23, with one end supported on the housing body 23 and with the other end Release lever arm 14 in the direction of release plunger 20 pressurized.
  • the connecting web 13 is the connection contacts two button 10 arranged side by side comprises.
  • the two Release lever arms 14 and 18 in turn include the two buttons 10, the release buttons of one between the two buttons displaceable actuating plunger 9 are actuated.
  • the Actuating plunger 9 is one in which Control element 34 facing side of the housing cover part 8 located opening can be actuated by the switch-on mechanism.
  • Fig. 2 shows the interaction of the clamping lever 1 with the Control curve 31 and the trigger lever 12.
  • the control curve 31 is an arcuate flat part that in the Has an opening in the middle of the flat side. Encloses the opening the control element 34 such that when the on or off Switch controls 34 takes the control curve and here moved about the axis of rotation of the control element 34.
  • the control cam has the trigger unit facing it Narrow side 35 has a recess 32 which is dimensioned in this way is that the cam 2 formed on the tension lever arm 1b so far can be pivoted into the recess 32 that in turn Tension lever arm 1a just rotates the release lever so that the Trigger plunger 20 completely into the magnetic storage housing 21 is depressed.
  • the recess 32 of the control curve 31 has a ramp-shaped Page 33, on which the cam 2 of the Release lever arm 1b slides along.
  • the control curve 31 from the control element 34 entrained and here about the axis of rotation of the control element 34 moves.
  • the cam 2 is from the ramp-shaped side 33 pressurized and against the spring action of the compression spring 5 pressed into the recess 27 of the housing cover 8.
  • the clamping lever 1 is pivoted so that it Release lever 12 is no longer pressurized and thus this is freely rotatable.
  • the trigger plunger 20 is in the magnetic storage case 21 located compression spring pressed out of the magnetic memory housing 21 and rotates the trigger lever 12, which with his Area of action 15 the switch protection mechanism of the switch operated.
  • the control element 34 is then by a Switch spring located in the OFF position, whereby the control curve 31 is carried along by the control element 34.
  • the control cam 31 pushes the recess 32 the control curve 31 in front of the cam 2, which is now by the Compression spring 5 can be pressed into the recess 32.
  • the clamping lever 1 is pivoted, which in turn the Release lever 12 rotated, the release lever 12 the Trigger plunger 20 presses into the magnetic memory housing 21.
  • the switch and trigger unit are in his again original OFF position and can be switched on again manually become.

Abstract

A trip unit (release unit) for a power circuit breaker or a protective switch, in particular as an undervoltage trip device which interacts with the switch drive mechanism in such a manner that, if the voltage is not sufficient, the trip unit unlatches the switch drive mechanism immediately, the trip unit having a trip coil 21, which is designed as a plunger-type armature coil and has a trip plunger 20 which is prestressed in the trip direction 30 by means of a compression spring and is inserted in a magnetic store housing, the end 2 of an arm 1b of a clamping lever 1, which is designed as a rocker, being pressed (during opening of the switch or when the locking mechanism is open) by a compression spring 5 into a cutout 32 which is located in a control cam 31 of the switch, such that the other arm 1a of the clamping lever 1 rotates the trip lever 12 in such a manner that the trip lever 12 is pivoted about its shaft 13 and, in consequence, presses the trip plunger 20 into the magnetic store housing 21. <IMAGE>

Description

Die Erfindung betrifft eine Auslöseeinheit für einen Leistungsschalter oder einen Schutzschalter, insbesondere als Unterspannungsauslöser, die mit dem Schalterantriebsmechanismus derart zusammenwirkt, daß bei nicht ausreichender Spannung die Auslöseeinheit den Schalterantriebsmechanismus sofort entklinkt, wobei die Auslöseeinheit eine als Tauchankerspule ausgebildete Auslösespule mit einem durch eine Druckfeder in Auslöserichtung belasteten, in einem Magnetspeichergehäuse einliegenden Auslösestößel aufweist.The invention relates to a trigger unit for a Circuit breaker or circuit breaker, especially as Undervoltage release with the switch drive mechanism interacts in such a way that when there is insufficient tension, the Release unit immediately releases the switch drive mechanism, wherein the trigger unit is designed as a plunger armature coil Trip coil with a by a compression spring in the trip direction loaded, lying in a magnetic storage housing Has trigger plunger.

Leistungsschalter, die mit einem zusätzlichen Schutzmodul ausgerüstet werden, sind bekannt. So beschreibt die EP 0 525 691 A1 einen derartigen Schalter, in dessen Gehäuse frontseitig eine als Modul ausgebildete Auslöseeinheit eingebaut werden kann. Derartige Schutzmodule sind meist als Unterspannungsauslöser ausgelegt, wobei bei einem Unterschreiten der an den Schalterkontakten anliegenden Spannung der Unterspannungsauslöser den Ausschaltmechanismus des Schalters betätigt.Circuit breaker with an additional protection module are known. This is how EP 0 525 691 describes A1 a switch of this type, in the housing of which a front trip unit designed as a module can be installed. Such protection modules are mostly as undervoltage releases designed, when falling below the to Switch contacts applied voltage of the undervoltage release actuated the switch-off mechanism.

Die heute bekannten Auslöseeinheiten wirken mit Hilfe von Hebeln mit dem Schaltmechanismus des Schalters zusammen. Die dafür verwendeten Hebel sind jedoch verhältnismäßig sperrig und groß ausgelegt, so daß eine angestrebte kompakte und kleine Ausführung einer Auslöseeinheit nicht erzielt werden kann. So ist aus der GB-PS 15 58 785 eine Auslöseeinheit für einen Leistungsschalter oder einen Unterspannungsschutzschalter bekannt. Bei der Auslöseeinheit sind die Hebel an zwei gegenüberliegenden Seiten des Gehäuses angelagert, wodurch die Hebel groß ausgeführt werden müssen und sie zudem eine sehr kompliziert herzustellende Form erhalten. Auch wirkt sich der komplizierte Hebelapparat nachteilig auf eine schnelle Montage des Schalter und der Auslöseeinheit aus. Besonders nachteilig wirkt sich bei der Auslöseeinheit nach der GB-PS 15 58 785 aus, daß es nach jedem Auslösen oder Ausschalten des Schalters erforderlich ist, den Auslösestößel manuell wieder in das Magnetspeichergehäuse zu drücken. Nach jedem Auslösen oder Ausschalten des Schalters ist dieser somit nicht sofort einschaltbar. Vor einem erneuten Einschaltversuch muß daher der Betätigungshebel des ausgeschalteten oder ausgelösten Schalters über die AUS-Position im Gegenuhrzeigersinn zurückgesetzt werden, um ihn darauf in die Schaltposition zurückkehren zu lassen. Der Auslösestößel wird dabei in das Magnetspeichergehäuse gedrückt. Es sind somit verhältnismäßig viele Schaltbewegungen vom Bedienungspersonal durchzuführen, um den Schalter in die EIN-Position bringen.The release units known today operate with the help of levers with the switching mechanism of the switch. The one for that However, levers used are relatively bulky and large designed so that a desired compact and small version a trip unit cannot be achieved. So is from the GB-PS 15 58 785 a tripping unit for a circuit breaker or an undervoltage protection switch known. In the The trigger unit are the levers on two opposite sides attached to the housing, making the levers large and they also have a very complicated shape to manufacture receive. The complicated lever mechanism also works disadvantageous to a quick assembly of the switch and the Trip unit. The has a particularly disadvantageous effect Tripping unit according to GB-PS 15 58 785 that it after each Tripping or turning off the switch is required Manually push the trigger plunger back into the magnetic storage housing to press. Every time the switch is triggered or switched off it cannot be switched on immediately. Before another Switch-on attempt must therefore be made using the operating lever of the switched off or tripped switch via the OFF position counterclockwise to put it in the To have the switching position return. The trigger plunger will pressed into the magnetic storage housing. So there are relatively many switching movements by the operating personnel to bring the switch to the ON position.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Auslöseeinheit für Leistungsschalter oder Schutzschalter der eingangs genannten Art, insbesondere als Unterspannungsauslöser so auszubilden, daß die Auslöseeinheit in ihrer Konstruktion wesentlich vereinfacht, in ihrer Größe verkleinert und der Montage und Fertigungsaufwand verringert wird. Zusätzlich soll eine Reduktion der verwendeten Teile bei gleichbleibendem Funktionsumfang der Auslöseeinheit erfolgen. Der Auslösestößel der Auslöseeinheit soll dabei automatisch nach jedem Ausschalten oder Auslösen in das Magnetspeichergehäuse gedrückt werden.The invention is therefore based on the object Tripping unit for circuit breakers or circuit breakers type mentioned above, in particular as undervoltage release to be designed so that the release unit in its construction much simplified, reduced in size and the Assembly and manufacturing costs are reduced. In addition, should a reduction in the parts used while maintaining the same Functional scope of the trip unit. The release plunger the trip unit should automatically after each switch off or trigger can be pressed into the magnetic storage housing.

Diese Aufgabe wird von der Erfindung dadurch gelöst, daß beim Öffnen des Schalters oder bei geöffnetem Schaltschloß das Ende eines Armes eines als Wippe ausgebildeten Spannhebels von einer Druckfeder in eine in einer Steuerkurve des Schalters befindliche Aussparung gedrückt ist, so daß der andere Arm des Spannhebels den Auslösehebel derart verdreht, daß der Auslösehebel um seine Achse verschwenkt wird und hierdurch den Auslösestößel in das Magnetspeichergehäuse drückt.This object is achieved by the invention in that Open the switch or open the switch lock the end an arm of a clamping lever designed as a rocker from one Compression spring in a located in a control curve of the switch Recess is pressed so that the other arm of the tensioning lever twisted the trigger lever so that the trigger lever around his Axis is pivoted and thereby the trigger plunger in the Magnetic storage case presses.

Der Vorteil gegenüber vom Stand der Technik bekannten Auslöseeinheiten, liegt in der Verwendung einer Steuerkurve und zwei mit dieser zusammenwirkenden, in ihrer Größe relativ kleinen Hebeln (Spannhebel sowie Auslösehebel), die durch ihre Abmessungen bedingt nur kleine Hubhöhen aufweisen. Dies ist eine wesentliche Verbesserung des Standes der Technik, da kleinere Hubhöhen der verwendeten Hebel kürzere Auslösezeiten bzw. schnellere Reaktionszeiten des Schutzschalters für die nachgeschalteten Apparaturen bedeutet. Auch führt die Verwendung von kleineren Hebeln zu geringeren Gehäuseabmessungen, welches ebenfalls das Ziel jedes Fachmannes ist. Kleinere Abmessungen der Hebel bedeuten zudem geringere Produktionskosten und tragen wesentlich zur Zuverlässigkeit der Auslöseeinheit und somit auch zur Sicherheit des Gesamtsystems bei.The advantage over known from the prior art Tripping units, lies in the use of a control curve and two interacting with it, relatively small in size Levers (tension levers as well as release levers), which by their Due to dimensions, only small lifting heights are required. this is a substantial improvement of the state of the art since smaller Lifting heights of the levers used, shorter tripping times or faster response times of the circuit breaker for the downstream equipment means. The use also leads from smaller levers to smaller housing dimensions, which is also the goal of every professional. Smaller dimensions of the Levers also mean lower production costs and bear essential to the reliability of the trip unit and thus also to the security of the overall system.

Ebenfalls neu ist, daß die erfindungsgemäße Auslöseeinheit nur über zwei Hebel verfügt, die sämtliche für eine Auslöseeinheit wichtigen Funktionen übernehmen. Die vom Stand der Technik her bekannten Auslöseeinheiten wie auch EP 0 525 691 A2 benötigen dagegen drei Hebel. Eine Reduzierung bedeutet dagegen eine entscheidende Vereinfachung der Mechanik, verringert den Produktionsaufwand und die Produktionskosten und trägt ebenfalls zur Funktionssicherheit der Auslöseeinheit bei. Auch ist es von Vorteil, daß der Auslösestößel automatisch in das Magnetspeichergehäuse gedrückt wird, sobald der Schalter ausgelöst oder ausgeschaltet ist.It is also new that the trigger unit according to the invention only has two levers, all for one release unit take on important functions. The state of the art need known release units as well as EP 0 525 691 A2 against it three levers. On the other hand, a reduction means one decisive simplification of the mechanics, reduces the Production effort and production costs and also bears to the functional safety of the trip unit. It is also from Advantage that the trigger plunger automatically in the Magnetic storage case is pressed as soon as the switch triggered or switched off.

Die Erfindung beschreibt zudem eine Steuerkurve, die als Schiebeteil derart gestaltet ist, daß sie das Ende des einen Arms des federbelasteten Spannhebels während des Einschaltvorgangs entgegen der Wirkung einer Druckfeder in eine im Gehäuse befindliche Aussparung eindrückt und den Spannhebel soweit um seine Drehachse verschwenkt, daß der Auslösehebel vom Spannhebel freigegeben wird. Die Steuerkurve ist dabei vorzugsweise am Bedienelement angelagert.The invention also describes a control curve, which as Sliding part is designed such that it is the end of one arm of the spring-loaded clamping lever during the switch-on process against the action of a compression spring in one in the housing Press the existing recess and the tension lever around its axis of rotation pivots that the release lever from the clamping lever is released. The control curve is preferably on Control element attached.

In ihrer favorisierten Ausführung ist die Steuerkurve ein bogenförmiges flaches Teil, daß in der Mitte der flachen Seite eine Öffnung aufweist und die Öffnung das Bedienelement derart umschließt, daß beim Ein- bzw. Ausschalten des Schalters das Bedienelement die Steuerkurve mitnimmt und um die Rotationsachse des Bedienelementes bewegt.In its preferred version, the control curve is on arcuate flat part that in the middle of the flat side has an opening and the opening of the control element encloses that when switching the switch on or off Control element takes the control cam along and around the axis of rotation of the control element moves.

Eine derartige Steuerkurve ist wesentlich stabiler als die bisher verwendeten Übertragungsmechanismen zwischen Schalter und Auslöseeinheit, die mit Hebeln realisiert werden. Durch die Anlagerung an das Bedienelement und die verbiegungsfeste Gestaltung der Steuerkurve ist eine genaue und verschleißfreie Kraftübertragung auf den Spannhebel der Auslöseeinheit gegeben.Such a control curve is much more stable than that previously used transmission mechanisms between switches and Tripping unit that can be realized with levers. Through the Attachment to the control element and the deflection-resistant The design of the control curve is accurate and wear-free Power transmission to the tensioning lever of the release unit.

Mittels einer Aussparung an der der Auslöseeinheit zugewandten Seite der Steuerkurve wird die Bedienelementposition an die Auslöseeinheit übertragen. Dazu weist die Aussparung der Steuerkurve eine Seite auf, die beim Einschalten des Schalters mit dem einen Ende das Spannhebels zusammenwirkt, wobei die Seite rampenförmig ausgebildet ist. Durch eine entsprechende Ausbildung der Seite der Aussparung wird das Zusammenspiel zwischen Schalter und Auslöseeinheit bestimmt, das ein zeitlich und räumlich exaktes Ineinandergreifen von Spannhebel und Steuerkurve erfordert.By means of a recess on the side facing the release unit The control element position is on the side of the control curve Transfer trigger unit. The recess of the Control curve on one side when switching on the switch cooperates with one end of the tensioning lever, the side is ramped. With appropriate training on the side of the recess is the interaction between switches and trigger unit determines that a temporally and spatially exact interlocking of tension lever and control cam required.

Der Spannhebel ist vorzugsweise als zweiarmiger Hebel ausgebildet und ist zwischen den beiden Hebelarmen mittels eines Bolzens drehbar am Gehäuse der Auslöseeinheit angelagert. Bei ungefähr gleichen Längenabmessungen der beiden Hebelarme des Spannhebels haben beide Arme bei gleichem Verdrehwinkel die gleiche Hubhöhe. The clamping lever is preferably designed as a two-armed lever and is between the two lever arms by means of a bolt rotatably attached to the housing of the trip unit. At about same length dimensions of the two lever arms of the tensioning lever both arms have the same lifting height at the same twist angle.

Dies ist ein deutlicher Vorteil gegenüber dem Stand der Technik, der einen einarmigen Spannhebel verwendet, bei dem sich die Hubhöhen vom angreifenden Schalterhebel und vom Auslösehebel, bedingt durch unterschiedliche Angriffspunkte am Hebel deutlich voneinander unterscheiden. Auch ist die Gestaltung und Lagerung eines einarmigen Hebels nur mit einem verhältnismäßig großen Aufwand zu realisieren, wogegen bei der Erfindung ein einziger Bolzen genügt um den Spannhebel sicher und drehbar zu lagern. Damit der von einer als Schraubenfeder ausgestalteten Druckfeder beim Auslösen der Auslöseeinheit getriebene Spannhebel möglichst schnell in die Aussparung der Steuerkurve schnellen kann, ist das Ende des Spannhebels, welches mit der Steuerkurve zusammenwirkt, als Stößel ausgebildet. Ein schnelles Auslösen ist zwingend erforderlich, wenn die Auslöseeinheit als Schutz für nachgeschaltete Apparaturen dienen soll.This is a clear advantage over the prior art, who uses a one-armed clamping lever, in which the Lifting heights of the engaging switch lever and the trigger lever, due to different points of attack on the lever differentiate from each other. Also the design and storage a one-armed lever only with a relatively large one To realize effort, whereas in the invention only one Bolts are sufficient to securely and rotatably mount the clamping lever. So that of a compression spring designed as a coil spring When the triggering unit is triggered, the tensioning levers are driven if possible can quickly snap into the recess of the control curve, that is End of the tensioning lever, which interacts with the control cam, designed as a pestle. A quick release is imperative required if the trip unit as protection for downstream equipment should serve.

Der mit dem Auslösehebel zusammenwirkende bogenförmig gestaltete Arm des Spannhebels weist an seiner Innenseite eine Wirkungsfläche auf, die so gestaltet ist, daß der Arm während der Drehbewegung beim Ausschalten des Schalters den Auslösehebel derart druckbeaufschlagt, daß der Auslösestößel um seine Drehachse in Richtung Auslösestößel verschwenkt wird und den Auslösestößel ganz in das Magnetspeichergehäuse hinein drückt.The arc-shaped, interacting with the release lever Arm of the tensioning lever has an inside Effective area, which is designed so that the arm during the Rotation movement when the switch is turned off the release lever so pressurized that the trigger plunger around his The axis of rotation is pivoted in the direction of the trigger plunger and the Push the tappet all the way into the magnetic storage housing.

Der Auslösehebel ist dabei ein Doppelhebelarm, wobei der Verbindungssteg der beiden Hebelarme die Drehachse des Auslösehebels ist. Der besondere Vorteil dieser Doppelhebelform ist darin zu sehen, daß der Verbindungssteg durch seine zylindrische Gestalt gleichzeitig Lagerdrehachse ist und in einer entsprechend gestalteten Ausnehmung im Auslösegehäuse einliegt und so vom korrespondierenden Gehäusedeckel eingespannt wird, daß der Auslösehebel sich noch um die Vebindungssteglängsachse verschwenken läßt. Hierdurch sind keine zusätzlichen Halterungsteile erforderlich. The trigger lever is a double lever arm, the Connecting bridge of the two lever arms the axis of rotation of the Release lever is. The particular advantage of this double lever shape can be seen in the fact that the connecting bridge through its cylindrical shape is at the same time bearing axis of rotation and in one suitably designed recess in the release housing and so clamped by the corresponding housing cover that the release lever is still about the longitudinal axis of the connecting web can pivot. This means there are no additional ones Bracket parts required.

Der Arm des Auslösehebels, der mit dem Spannhebel zusammenwirkt, weist vorzugsweise an seinem Ende einen Nocken auf, der mit der Wirkungsfläche des Spannhebelarmes zusammenwirkt. Durch diesen Nocken ist eine Führung des Auslösehebel von der Wirkungsfläche des Spannhebels stets gewährleistet. Die runde Form des Nockens trägt zusätzlich zum ruckfreien Entlanggleiten an der Wirkungsfläche bei.The arm of the trigger lever, which cooperates with the tension lever, preferably has at its end a cam which is connected to the Area of action of the tension lever arm interacts. Through this Cam is a guide of the trigger lever from the effective surface of the clamping lever always guaranteed. The round shape of the cam also contributes to the smooth sliding along the Effective area at.

Der Hebelarm des Auslösehebels, der mit dem Auslösestößel und dem Ausschaltschutzmechanismus des Schalters zusammenwirkt, weist einen Nocken an der dem Auslösestößel abgewandten Seite auf, der das eine Ende einer Druckfeder hält, die vorzugsweise als Schraubenfeder ausgebildet ist. Die Kontaktfläche des Hebelarmes mit dem Auslösestößel ist ebenfalls vorzugsweise als abgerundeter Nocken auszubilden. An dem Ende weist der Hebelarm des Auslösehebels eine Wirkungsfläche auf, die mit dem Ausschaltschutzmechanismus zusammenwirkt.The lever arm of the trigger lever, the one with the trigger plunger and the Switch-off protection mechanism of the switch interacts, points a cam on the side facing away from the trigger plunger, the which holds one end of a compression spring, which preferably as Coil spring is formed. The contact surface of the lever arm with the trigger plunger is also preferably as a rounded Train cams. At the end the lever arm of the Trigger lever on an effective area that with the Switch-off protection mechanism interacts.

Die Drehachse des Spannhebels und die Drehachse des Auslösehebels sind vorzugsweise parallel zueinander anzuordnen, wodurch eine günstige Kraftübertragung gewährleistet ist. Die Längsachse des Magnetspeichersystems und die Spannhebellängsachse sollten ebenfalls parallel zueinander sein.The axis of rotation of the tensioning lever and the axis of rotation of the release lever should preferably be arranged parallel to each other, whereby a favorable power transmission is guaranteed. The longitudinal axis of the Magnetic storage system and the tension lever longitudinal axis should also be parallel to each other.

Ein weiterer wesentlicher Vorteil der Erfindung ist die ausschließliche Verwendung von Druckfedern, insbesondere Schraubenfedern, die zwischen den Gehäuseteilen und den Hebeln lagern. Die Ausgestaltung der Hebel und der Gehäuseteile ermöglicht dabei eine schnellere Montage gegenüber den heute verwendeten Zugfedern, da diese an ihren Enden in entsprechende Halterungen eingefädelt werden müssen.Another significant advantage of the invention is that exclusive use of compression springs, in particular Coil springs between the housing parts and the levers to store. The design of the lever and the housing parts enables faster assembly compared to today used tension springs, as these at their ends in corresponding Brackets need to be threaded.

Ein bevorzugtes Ausführungsbeispiel ist in den nachfolgend erläuterten Zeichnungen schematisch dargestellt. A preferred embodiment is shown in the following illustrated drawings shown schematically.

Es zeigen:

Fig. 1
Ein Explosionszeichnung der Auslöseeinheit mit Magnetsystem, Spannhebel und Auslösehebel
Fig. 2
Eine Seitenansicht der Auslöseeinheit; Zusammenwirken des Spannhebels mit dem Auslösehebel und der Steuerkurve
Show it:
Fig. 1
An exploded view of the release unit with magnet system, tension lever and release lever
Fig. 2
A side view of the trip unit; Interaction of the tension lever with the release lever and the control cam

In Fig. 1 ist eine bevorzugte Ausführung der Auslöseeinheit für Leistungs- und Schutzschalter dargestellt.In Fig. 1 is a preferred embodiment of the trigger unit for Circuit breaker and circuit breaker shown.

Das Gehäuse der Auslöseeinheit wird aus dem formhergestellten Grundkörper 23 und dem formhergestellten Gehäusedeckelteil 8 gebildet, wobei die beiden Teile vorzugsweise aus Kunststoff sind und durch Schrauben 6 zusammengehalten werden. In der Auslöseeinheit sind die Anschlußklemmen 26, 28 und die dazugehörige Klemmenabdeckung 25, sowie das Gleichrichterteil 24 und zwei Taster 10, mit dazugehörigem Betätigungsstößel 9 angeordnet. Zusätzlich sind in den Gehäuseteilen 8 und 23 Aussparungen für das Magnetspeichergehäuse 21 mit Auslösestößel 20, den Auslösehebel 12 und den Spannhebel 1 vorhanden.The housing of the trip unit is made from the mold Base body 23 and the molded cover part 8 formed, the two parts are preferably made of plastic and held together by screws 6. In the Tripping unit are the terminals 26, 28 and associated terminal cover 25 and the rectifier part 24 and two buttons 10, with associated actuating plunger 9 arranged. In addition, 8 and 23 are in the housing parts Cutouts for the magnetic storage housing 21 with a trigger plunger 20, the release lever 12 and the tensioning lever 1 are present.

Die Auslöseeinheit wird in eine Aussparung neben dem Bedienelement 34 des nicht dargestellten Schaltergehäuses angeordnet und wirkt mit dem Auslösemechanismus des Schalters über den Spannhebel 1 und den Auslösehebel 12 zusammen.The trigger unit is in a recess next to the Control element 34 of the switch housing, not shown arranged and acts with the trigger mechanism of the switch via the tension lever 1 and the release lever 12 together.

Der als Schwinge ausgebildete Spannhebel 1 ist mit dem Bolzen 7 im Gehäusedeckelteil 8 verdrehbar gelagert. Dabei befindet sich der Arm 1a des Spannhebels 1 innerhalb des Gehäuses. Der Arm 1b ist in eine schlitzförmige Aussparung in der Gehäusedeckelteilaußenseite versenkbar. Das Ende der schlitzförmigen Aussparung ist mit einer Aussparung 27 verbunden, in der eine Druckfeder 5, insbesondere eine Schraubenfeder einliegt. Die Druckfeder 5 stützt sich mit ihrem einen Ende gegen das Gehäusedeckelteil 8. Das andere Ende der Druckfeder 5 wird von einem am Spannhebelarm 1b befindlichen Nocken 4 gehalten. Die Druckfeder 5 druckbeaufschlagt den Spannhebel 1 derart, daß der Spannhebelarm 1b aus dem Gehäusedeckel 8 herausgedrückt wird.The tension lever 1, which is designed as a rocker, is connected to the bolt 7 rotatably supported in the housing cover part 8. Is located the arm 1a of the tensioning lever 1 inside the housing. The arm 1b is in a slot-shaped recess in the Exterior cover part retractable. The end of slot-shaped recess is connected to a recess 27, in which a compression spring 5, in particular a coil spring lies in. The compression spring 5 is supported with one end the housing cover part 8. The other end of the compression spring 5 held by a cam 4 located on the tension lever arm 1b. The Compression spring 5 pressurizes the tensioning lever 1 such that the Tension lever arm 1b is pushed out of the housing cover 8.

An der dem Gehäusedeckelteil 8 abgewandten Seite des Spannhebelarms 1b ist ein Nocken 2, der an seinem Ende vorzugsweise abgerundet ist. Der Spannhebel 1 ist so geformt, daß der Nocken 2 beim Verdrehen des Spannhebels 1 entgegengesetzt der Federwirkung der Druckfeder 5 ganz in der Aussparung 27 des Gehäusedeckelteils einliegt.On the side facing away from the housing cover part 8 Tension lever arm 1b is a cam 2 which is at its end is preferably rounded. The tension lever 1 is shaped so that the cam 2 when turning the clamping lever 1 opposite the Spring action of the compression spring 5 in the recess 27 of the Housing cover part lies.

Der Spannhebelarm 1a ist bogenförmig ausgestaltet und hat an seiner Bogeninnenseite eine Wirkungsfläche 3, die mit dem zylinderförmigen Nocken 17 des Auslösehebelarmes 18 zusammenwirkt. Durch die zylindrische Gestalt des Nockens 17 und die besondere Gestalt der Wirkungsfläche 3, ist während der Verdrehung des Spannhebels 1, bei der der Spannhebelarm 1b aus dem Gehäusedeckelteil 8 von der Druckfeder 5 herausgedrückt wird, eine kontinuierliche Kraftübertragung vom Spannhebelarm 1a auf den Nocken 17 des Auslösehebelarmes 18 derart gewährleistet, daß der Auslösehebel 12 um seine Rotationsachse 13 so verschwenkt wird, daß der Auslösehebelarm 14 gegen den Auslösestößel 20 verschwenkt wird und den Auslösestößel 20 vollständig in das Magnetspeichergehäuse 21 drückt.The tensioning lever arm 1a is arcuate and has on its arc inside an effective area 3, which with the cylindrical cam 17 of the release lever arm 18 cooperates. Due to the cylindrical shape of the cam 17 and the special shape of the effective area 3, is during the Rotation of the tensioning lever 1, at which the tensioning lever arm 1b is off the housing cover part 8 is pressed out by the compression spring 5, a continuous power transmission from the tension lever arm 1a the cam 17 of the trigger lever arm 18 ensures that the trigger lever 12 is pivoted about its axis of rotation 13 is that the trigger lever arm 14 against the trigger plunger 20th is pivoted and the trigger plunger 20 completely in the Magnetic storage housing 21 presses.

Der Auslösehebel 12 ist ein C-förmiger Doppelhebelarm mit den Hebelarmen 14 und 18, die an einem Verbindungssteg 13 starr befestigt sind. Der Auslösehebel 12 liegt mit seinem Verbindungssteg 13 in einer Aussparung des Gehäusegrundkörpers 23 ein, wobei der Auslösehebel 12 um die Längsachse des Verbindungsstegs 13 verdrehbar ist. Dabei liegt das zylinderförmig ausgestaltete Ende 19 des Verbindungsstegs 13 in der ebenfalls zylinderförmigen Aussparung 22 des Gehäusegrundkörpers 23. Der Auslösehebelarm 18 ist aus Stabilitätsgründen ein scheibenförmiges Segment, an dessen dem Verbindungssteg 13 abgewandten Ende ein zylinderförmiger Nocken 17 angeformt ist, wobei der Nocken 17 auf der dem Auslösehebelarm 14 abgewandten Scheibensegmentseite 18a angeformt ist und die abgewandte Scheibensegmentseite 18a für den Spannhebelarm 1a eine Stützfläche bildet. Der Auslösehebelarm 14 besitzt einen Nocken 16, der das eine Ende einer als Schraubenfeder ausgebildeten Druckfeder 11 hält, wobei die Druckfeder 11 den Auslösehebelarm 14 gegen den Auslösestößel 20 drückt. Zusätzlich hat der Auslösehebelarm 14 eine Wirkungsfläche, die als Nocken ausgebildet ist und mit dem Auslösestößel 20 zusammenwirkt. An seinem dem Verbindungssteg 13 abgewandten Ende besitzt der Auslösehebelarm 14 eine Wirkungsfläche 15, die ebenfalls bevorzugt als Nocken ausgebildet ist, die mit dem nicht dargestellten Ausschaltschutzmechanismus des Schalters zusammenwirkt.The trigger lever 12 is a C-shaped double lever arm with the Lever arms 14 and 18 which are rigid on a connecting web 13 are attached. The trigger lever 12 lies with his Connecting web 13 in a recess in the housing base 23 a, the trigger lever 12 about the longitudinal axis of the Connecting web 13 is rotatable. That’s it cylindrical end 19 of the connecting web 13 in the also cylindrical recess 22 of the Main body 23. The trigger arm 18 is off Stability reasons a disc-shaped segment, on the Connecting web 13 facing away from a cylindrical cam 17 is integrally formed, the cam 17 on the trigger arm 14 facing away from the disk segment side 18a and the facing disc segment side 18a for the tension lever arm 1a a Support surface forms. The trigger lever arm 14 has a cam 16, the one end of a coil spring Compression spring 11 holds, the compression spring 11 the trigger arm 14 presses against the trigger plunger 20. In addition, the Release lever arm 14 has an effective area that acts as a cam is formed and cooperates with the trigger plunger 20. On its end facing away from the connecting web 13 has Release lever arm 14 an effective area 15, which also is preferably designed as a cam that does not illustrated switch protection mechanism of the switch cooperates.

Die Druckfeder 11 liegt in einer Aussparung des Gehäusegrundkörpers 23 ein, wobei sie sich mit ihrem einen Ende am Gehäusegrundkörper 23 abstützt und mit ihrem anderen Ende den Auslösehebelarm 14 in Richtung Auslösestößel 20 druckbeaufschlagt.The compression spring 11 is in a recess of the Housing base body 23, with one end supported on the housing body 23 and with the other end Release lever arm 14 in the direction of release plunger 20 pressurized.

Der Verbindungssteg 13 wird von den Anschlußkontakten zweier nebeneinander angeordneter Taster 10 umfaßt. Die beiden Auslösehebelarme 14 und 18 umfassen ihrerseits die beiden Taster 10, deren Auslösetasten von einem zwischen die beiden Taster verschiebbaren Betätigungsstößel 9 betätigt werden. Der Betätigungsstößel 9 ist dabei durch eine in der dem Bedienungselement 34 zugewandten Seite des Gehäusedeckelteils 8 befindlichen Öffnung vom Schaltereinschaltmechanismus betätigbar.The connecting web 13 is the connection contacts two button 10 arranged side by side comprises. The two Release lever arms 14 and 18 in turn include the two buttons 10, the release buttons of one between the two buttons displaceable actuating plunger 9 are actuated. Of the Actuating plunger 9 is one in which Control element 34 facing side of the housing cover part 8 located opening can be actuated by the switch-on mechanism.

Fig. 2 zeigt das Zusammenwirken des Spannhebels 1 mit der Steuerkurve 31 und dem Auslösehebel 12.Fig. 2 shows the interaction of the clamping lever 1 with the Control curve 31 and the trigger lever 12.

Die Steuerkurve 31 ist ein bogenförmiges flaches Teil, daß in der Mitte der flachen Seite eine Öffnung hat. Die Öffnung umschließt das Bedienelement 34 derart, daß beim Ein- bzw. Ausschalten des Schalters das Bedienelement 34 die Steuerkurve mitnimmt und hierbei um die Rotationsachse des Bedienelementes 34 bewegt. Die Steuerkurve hat an ihrer der Auslöseeinheit zugewandten Schmalseite 35 eine Aussparung 32, die in ihrer Größe so bemessen ist, daß der an dem Spannhebelarm 1b angeformte Nocken 2 soweit in die Aussparung 32 einschwenkbar ist, daß wiederum der Spannhebelarm 1a den Auslösehebel gerade so verdreht, daß der Auslösestößel 20 vollständig in das Magnetspeichergehäuse 21 eingedrückt ist.The control curve 31 is an arcuate flat part that in the Has an opening in the middle of the flat side. Encloses the opening the control element 34 such that when the on or off Switch controls 34 takes the control curve and here moved about the axis of rotation of the control element 34. The The control cam has the trigger unit facing it Narrow side 35 has a recess 32 which is dimensioned in this way is that the cam 2 formed on the tension lever arm 1b so far can be pivoted into the recess 32 that in turn Tension lever arm 1a just rotates the release lever so that the Trigger plunger 20 completely into the magnetic storage housing 21 is depressed.

Die Aussparung 32 der Steuerkurve 31 besitzt eine rampenförmige Seite 33, an der beim Einschalten des Schalters der Nocken 2 des Auslösehebelarmes 1b entlanggleitet. Beim Umwerfen des Bedienelementes 34, wird die Steuerkurve 31 vom Bedienelement 34 mitgenommen und hierbei um die Rotationsachse des Bedienelementes 34 bewegt. Der Nocken 2 wird dabei von der rampenförmigen Seite 33 druckbeaufschlagt und entgegen der Federwirkung der Druckfeder 5 in die Aussparung 27 des Gehäusedeckels 8 eingedrückt. Hierdurch wird der Spannhebel 1 so verschwenkt, daß er den Auslösehebel 12 nicht mehr druckbeaufschlagt und dieser somit frei drehbar ist.The recess 32 of the control curve 31 has a ramp-shaped Page 33, on which the cam 2 of the Release lever arm 1b slides along. When knocking over the Control element 34, the control curve 31 from the control element 34 entrained and here about the axis of rotation of the control element 34 moves. The cam 2 is from the ramp-shaped side 33 pressurized and against the spring action of the compression spring 5 pressed into the recess 27 of the housing cover 8. As a result, the clamping lever 1 is pivoted so that it Release lever 12 is no longer pressurized and thus this is freely rotatable.

Liegt bei eingeschaltetem Schalter oder während des Einschaltens eine genügend hohe Spannung an den Schaltkontakten des Schalters und somit ebenfalls eine entsprechend hohe Spannung an den Anschlußklemmen der als Tauchankerspule ausgebildeten Auslösespule, so hält die Tauchankerspule den durch eine Druckfeder in Auslöserichtung 30 belasteten Auslösestößel im Magnetspeichergehäuse. Durch die Druckfeder 11 wird der Auslösehebel 12 gegen den Auslösestößel gedrückt und löst den Ausschaltschutzmechanismus des Schalters nicht aus. Der Schalter bleibt auch weiterhin eingeschaltet.Is when the switch is turned on or while turning on a sufficiently high voltage at the switch contacts of the switch and thus also a correspondingly high voltage on the Terminals of the plunger armature coil Trigger coil, so the plunger armature holds the by one Compression spring in the release direction 30 loaded tappet in Magnetic storage case. Through the compression spring 11 Release lever 12 pressed against the release plunger and releases the Switch off protection mechanism does not switch off. The desk remains switched on.

Ist dagegen die angelegte Spannung zu klein, so reicht das von der Auslösespule erzeugte Magnetfeld nicht aus, den Auslösestößel entgegen der Druckfeder im Magnetspeichergehäuse 21 zu halten. If, on the other hand, the applied voltage is too low, that is enough magnetic field generated by the trip coil, the trip plunger to hold against the compression spring in the magnetic memory housing 21.

Der Auslösestößel 20 wird von der im Magnetspeichergehäuse 21 befindlichen Druckfeder aus dem Magnetspeichergehäuse 21 gedrückt und verdreht dabei den Auslösehebel 12, welcher mit seiner Wirkungsfläche 15 den Ausschaltschutzmechanismus des Schalters betätigt. Das Bedienelement 34 wird daraufhin durch eine im Schalter befindliche Feder in die AUS-Stellung umgeworfen, wobei die Steuerkurve 31 vom Bedienelement 34 mitgenommen wird. Durch das Mitnehmen der Steuerkurve 31 schiebt sich die Aussparung 32 der Steuerkurve 31 vor den Nocken 2, der jetzt durch die Druckfeder 5 in die Aussparung 32 gedrückt werden kann. Hierdurch wird der Spannhebel 1 verschwenkt, welcher seinerseits den Auslösehebel 12 verdreht, wobei der Auslösehebel 12 den Auslösestößel 20 in das Magnetspeichergehäuse 21 eindrückt.The trigger plunger 20 is in the magnetic storage case 21 located compression spring pressed out of the magnetic memory housing 21 and rotates the trigger lever 12, which with his Area of action 15 the switch protection mechanism of the switch operated. The control element 34 is then by a Switch spring located in the OFF position, whereby the control curve 31 is carried along by the control element 34. By taking the control cam 31 pushes the recess 32 the control curve 31 in front of the cam 2, which is now by the Compression spring 5 can be pressed into the recess 32. Hereby the clamping lever 1 is pivoted, which in turn the Release lever 12 rotated, the release lever 12 the Trigger plunger 20 presses into the magnetic memory housing 21.

Der Schalter samt Auslöseeinheit befindet sich wieder in seiner ursprünglichen AUS-Stellung und kann erneut manuell eingeschaltet werden.The switch and trigger unit are in his again original OFF position and can be switched on again manually become.

Claims (18)

  1. A trip unit for a circuit breaker or protected switchgear, more particularly taking the form of an undervoltage release, which so co-operates with the switch drive mechanism that in case of inadequate voltage, the trip unit immediately unlatches the switch drive mechanism, the trip unit having a trip coil (21) which takes the form of a sucking coil and has a trip tappet (20) loaded by a compression spring in the trip direction (30) and accommodated in a magnetic memory casing,
    characterised in that during the opening of the switch or when the switch latch is opened, the end (2) of one arm (1b) of a clamping lever (1) constructed in the form of a rocker is forced by a compression spring (5) into a recess (32) in a control cam (31) of the switch, the other arm (la) of the clamping lever (1) so rotating a trip lever (12) that said trip lever (12) is pivoted around its pivot (13), thereby forcing the trip tappet (20) into the magnetic memory casing (21).
  2. A trip unit according to claim 1,
    characterised in that the control cam (31) is so designed that during the switching on operation the end (2) of one arm (1b) of the spring-loaded clamping lever (1) is forced against the force of the compression spring (5) into a recess (27) in the casing cover (8) and pivots the clamping lever (2) so far around its pivot (13) that the trip lever (12) is released from the clamping lever (2).
  3. A trip unit according to one of the preceding claims,
    characterised in that that the control cam (31) is attached to the operating element (34).
  4. A trip unit according to one of the preceding claims,
    characterised in that the control cam (31) is an arcuate flat member which has an opening in the centre of the flat side, the opening so enclosing the operating element (34) that during the switching on and off of the switch the operating element entrains the control cam (31), at the same time moving around the axis of rotation of the operating element (34).
  5. A trip unit according to one of the preceding claims,
    characterised in that the recess (32) of the control cam (31) is situated on the side (35) adjacent the trip unit.
  6. A trip unit according to one of the preceding claims,
    characterised in that the recess (32) of the control cam (31) has a ramp-shaped side (33) along which during the switching on of the switch the end (2) of the arm (1b) of the clamping lever (1) slides and can thereby be forced into a recess (27) in the casing cover (8).
  7. A trip unit according to claims 6 and 7,
    characterised in that when the switch is switched on, the narrow side (35) of the control cam (31) adjacent the trip unit has rotated the clamping level (1) so far that said clamping lever (1) releases the trip lever (12).
  8. A trip unit according to one of the preceding claims,
    characterised in that the arm (1b) of the clamping lever (1) co-operating with the control cam (31) has at its end a tappet (2) which engages in the recess (32) of the control cam (31).
  9. A trip unit according to one of the preceding claims,
    characterised in that the arm (1b) of the clamping lever (1) co-operating with the control cam (31) is so subjected to the pressure of a spring (5) that the arm (1b) of the clamping lever (1) is forced out of the casing cover (8).
  10. A trip unit according to one of the preceding claims,
    characterised in that the arm (1b) of the clamping lever (1) co-operating with the control cam (31) has at its end on the side adjacent the casing cover (8) a retaining means (4), more particularly a cam, for receiving the compression spring (5).
  11. A trip unit according to one of the preceding claims,
    characterised in that the arm (1a) of the clamping lever (1) is constructed arcuate and has on the inside of the arc an operative surface (3) which co-operates with the trip lever (12).
  12. A trip unit according to one of the preceding claims,
    characterised in that the operative surface (3) of the arm (1a) of the clamping lever (1) is so shaped that during the rotary movement in the switching off of the switch the trip lever (12) is so acted upon by pressure that the trip lever (12) is pivoted around its pivot (13) in the direction of the trip tappet (20) and forces the trip tappet (20) completely into the magnetic memory casing (21).
  13. A trip unit according to one of the preceding claims,
    characterised in that the trip lever (12) is a double lever arm, the connecting web (13) of the two lever arms (14, 18) being the pivot (13) of the trip lever (12).
  14. A trip unit according to claim 13,
    characterised in that the arm (18) of the trip lever (12) has at its end remote from the connecting web (13) a cam (17) which co-operates with the operative surface (3) of the clamping lever arm (1a).
  15. A trip unit according to one of the preceding claims,
    characterised in that the arm (14) of the trip lever (12) has a surface which preferably takes the form of a cam and which co-operates with the trip tappet (20).
  16. A trip unit according to one of the preceding claims,
    characterised in that the arm (14) of the trip lever (12) has at its end remote from the connecting web (13) a surface (15) which co-operates with the switch-off protective mechanism of the switch.
  17. A trip unit according to one of the preceding claims,
    characterised in that the pivot (7) of the clamping lever (1) and the pivot (13) of the trip lever (12) are parallel with one another.
  18. A trip unit according to one of the preceding claims,
    characterised in that the clamping lever longitudinal axis and the longitudinal axis of the magnetic memory system (20, 21) are substantially parallel with one another.
EP94118386A 1993-12-03 1994-11-23 Trip unit for circuit breaker or protective switches Expired - Lifetime EP0656641B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4341214 1993-12-03
DE4341214A DE4341214C2 (en) 1993-12-03 1993-12-03 Tripping unit for circuit breakers or circuit breakers

Publications (3)

Publication Number Publication Date
EP0656641A2 EP0656641A2 (en) 1995-06-07
EP0656641A3 EP0656641A3 (en) 1997-05-28
EP0656641B1 true EP0656641B1 (en) 1999-04-14

Family

ID=6504088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118386A Expired - Lifetime EP0656641B1 (en) 1993-12-03 1994-11-23 Trip unit for circuit breaker or protective switches

Country Status (3)

Country Link
EP (1) EP0656641B1 (en)
AT (1) ATE179024T1 (en)
DE (2) DE4341214C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834996A (en) * 1996-04-18 1998-11-10 Ellenberger & Poensgen Gmbh Electric switch having undervoltage tripping
DE59608320D1 (en) * 1996-06-10 2002-01-10 Siemens Ag Undervoltage release
DE19735413B4 (en) * 1997-08-14 2007-11-29 Siemens Ag Tripping device for a circuit breaker
DE10145059C1 (en) * 2001-09-13 2003-03-13 Moeller Gmbh Multi-pole switching device provided with interchangable undervoltage release with integrated auxiliary switch operated in released position
DE102009059839A1 (en) 2009-12-21 2011-06-22 Eaton Industries GmbH, 53115 Device for use with e.g. electrical switching device for detecting reversal of current direction in photovoltaic strand, has magnetically polarized armature operatively connected with actuator
KR101212213B1 (en) 2011-07-15 2012-12-13 엘에스산전 주식회사 Apparatus of modular trip mechanism and accessory mechanism for circuit breaker
JP5747806B2 (en) * 2011-12-14 2015-07-15 三菱電機株式会社 Circuit breaker
KR101297549B1 (en) * 2011-12-30 2013-08-14 엘에스산전 주식회사 Trip device of short voltage for molded case circuit breaker
DE102014202485B4 (en) 2014-02-12 2021-08-05 Siemens Aktiengesellschaft Release device

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US3928826A (en) * 1974-05-30 1975-12-23 Westinghouse Electric Corp Circuit breaker with improved tripped latch means
US4013926A (en) * 1975-07-11 1977-03-22 Westinghouse Electric Corporation Circuit breaker with improved trip actuator and undervoltage release mechanism
US4097831A (en) * 1977-01-21 1978-06-27 General Electric Company Circuit breaker accessory tripping apparatus
US4246558A (en) * 1979-01-22 1981-01-20 Gould Inc. Auxiliary feature modules for circuit breakers
US5093643A (en) * 1990-10-22 1992-03-03 Westinghouse Electric Corp. Undervoltage release device assembly for circuit breaker
DE4125338A1 (en) * 1991-07-31 1993-02-04 Kloeckner Moeller Gmbh RELEASE UNIT FOR CIRCUIT BREAKERS AND CIRCUIT BREAKERS, ESPECIALLY DESIGNED AS UNDERVOLTAGE RELEASES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
US8087976B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Trigger assembly for angle grinder
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Also Published As

Publication number Publication date
DE59408114D1 (en) 1999-05-20
DE4341214C2 (en) 1996-11-07
ATE179024T1 (en) 1999-04-15
EP0656641A3 (en) 1997-05-28
EP0656641A2 (en) 1995-06-07
DE4341214A1 (en) 1995-06-08

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