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EP0035083A1 - Protective switch with a release operable by hand - Google Patents

Protective switch with a release operable by hand Download PDF

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Publication number
EP0035083A1
EP0035083A1 EP80730052A EP80730052A EP0035083A1 EP 0035083 A1 EP0035083 A1 EP 0035083A1 EP 80730052 A EP80730052 A EP 80730052A EP 80730052 A EP80730052 A EP 80730052A EP 0035083 A1 EP0035083 A1 EP 0035083A1
Authority
EP
European Patent Office
Prior art keywords
plunger
circuit breaker
guided
trigger
breaker according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80730052A
Other languages
German (de)
French (fr)
Other versions
EP0035083B1 (en
Inventor
Bernhard Preuss
Reinhard Zeuke
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT80730052T priority Critical patent/ATE3226T1/en
Publication of EP0035083A1 publication Critical patent/EP0035083A1/en
Application granted granted Critical
Publication of EP0035083B1 publication Critical patent/EP0035083B1/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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/126—Automatic release mechanisms with or without manual release actuated by dismounting of circuit breaker or removal of part of circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/128—Manual release or trip mechanisms, e.g. for test purposes

Definitions

  • the invention relates to an electrical circuit breaker with movable contact pieces, an insulating housing consisting of an upper part and a lower part, a trigger for automatic shutdown by releasing the latching of the movable contact pieces and an attached to the upper part of the insulating material housing, movable against the action of an energy accumulator by hand, with the Trigger cooperating trigger organ.
  • a circuit breaker with these features has become known, for example, from US Pat. No. 3,895,205.
  • the trigger element which can be operated by hand, is used to test the circuit breaker without having to remove it from its installation location.
  • the invention has for its object to provide circuit breakers with a device that triggers the circuit breaker when lifting from its mounting surface, and to include an existing manual release member in this device.
  • a plunger ending on the underside of the lower part, which is used to fasten the circuit breaker, can advantageously serve as the abutment of the further energy accumulator opposite the trigger element. The plunger ensures the inevitable actuation of the device.
  • the trigger element can be designed as a plunger which is mounted in a linearly displaceable manner in the upper part of the insulating material housing and which is connected in a longitudinally displaceable manner to the plunger guided in the lower part of the housing. Both plungers can then be attached to the lower part of the housing with the associated energy stores. When the upper part is put on, the upper plunger comes into its guide located in the upper part.
  • a further embodiment of the invention can ensure that the device can be used equally for manual triggering or manual triggering and additional automatic triggering when the circuit breaker is lifted from its mounting surface.
  • the plunger guided in the lower part of the housing can be provided with a widened foot part, and on the underside of the lower part a recess can be arranged for receiving the foot part and a locking member which blocks the plunger and can be attached if necessary.
  • the locking member for. B. a spring washer, inserted into the recess, the plunger guided in the lower part can not move and then serves as a fixed abutment of one end of the stronger energy accumulator.
  • the plunger guided in the lower part has the option of stepping out of the mounting surface under the effect of the stronger force accumulator on the underside of the switch when the circuit breaker is lifted, whereby the stronger force storage spring relaxes.
  • the force storage spring acting on the plunger guided in the upper part is then able to overcome the reduced spring force of the stronger force storage spring and to trigger the circuit breaker.
  • Fig. 1 shows a low-voltage circuit breaker with insulating housing and rocker arm drive in the region of the central pole track in section.
  • the same circuit breaker is shown in plan view in FIG. 2.
  • a device according to the invention is shown as section III-III in Fig. 2 in Fig. 3.
  • a detail of the device is shown enlarged in FIG. 4.
  • the circuit breaker 1 shown in FIG. 1 comprises a housing 2 consisting of an insulating material, which has an upper part 3 and a lower part 4. From an opening 5 of the upper part 3, a rocker arm 6 protrudes as an operating handle.
  • the current path of the circuit breaker 1 extends from a lower connection device 7 through a trigger designated as a whole as 10 and from there through a flexible current band 11 to a movable contact arm 12 shown in the off position. If the circuit breaker is switched on, the current path extends further from the contact arm 12 to an upper connection device 13.
  • the contact arm 12 is spring-mounted on a carrier 14 which is fastened on a switching shaft 15.
  • a lever of a toggle lever system 16, on the knee joint 17 of which a tension spring 20 engages, is connected in an articulated manner to the carrier 14.
  • the other end of the tension spring 20 is adjustable by the rocker arm 6 in such a way that the toggle lever system 16 can be brought into the extended position from the buckled position shown, as a result of which the contact arm 12 is transferred into the closed position.
  • the trigger 10 comprises a thermal and an electromagnetic overcurrent release in a known manner. Both act on a release shaft 21, when it is rotated from the rest position shown, an intermediate pawl 22 and a main pawl 23 supported thereon be released. As a result, the support of the toggle lever system 16 is released, so that the contact arm 12 reaches the switch-off position shown even when the toggle levers are extended.
  • the circuit breaker 1 shown has a three-pole design, three identical current paths being arranged parallel to one another in chambers of the insulating material housing 2.
  • the switching shaft 15 connects the carrier 14 of the three poles.
  • the drive and release mechanism described is only provided in the middle pole track.
  • the trigger shaft 21 extends over all poles and can be influenced by the triggers of each pole.
  • a first energy accumulator is formed by a helical compression spring 31 which surrounds the plunger 30 and is supported at one end on the shoulder 27 and at the other end on a shoulder 32 of a recess 33 which receives the plunger 30.
  • a cross pin 34 serves as an abutment of the helical compression spring 31 as long as the plunger 30 is outside the circuit breaker 1.
  • a further tappet 36 is guided in a recess 35 of the lower part 4, which tapers at its end facing the upper tappet 30 and is provided with a mushroom-shaped pin 37 which is undercut with a sharp edge.
  • the parts of the pin 37 are in a recess 40 in the upper plunger 30 in the position of use.
  • a separation of the two plungers is then only possible by partially destroying the material, ie the connection is so resistant that the two plungers are held together after a single assembly. They are then connected in a longitudinally displaceable manner in accordance with the length of the recess 40. (Fig. 4)
  • Another helical compression spring 42 is inserted between a shoulder 41 of the plunger 36 and the end face of the plunger 30. It forms the stronger energy accumulator, while the helical compression spring 31 forms the weaker energy accumulator, which prestresses the plunger 30 in the sense of actuating the trigger shaft 21.
  • the plunger 36 is provided with a foot part 43 which, in the rest position of the plunger 36 shown in FIG. 3, is received in a recess 44 on the underside of the lower part 4.
  • a spring ring 45 serving as a locking member is also inserted into the recess 44 and secures the tappet 36 against any displacement.
  • the device described works in the following way: starting from the position of the parts shown in Fig. 3, the plunger 30 with its upper pin 46, which is flush with the surface of the upper part 3, by using an auxiliary tool, for. B. a pen or screwdriver. Overcoming the Due to the force of the helical spring 42, the shoulder 27 comes to rest on the extension 25 of the release shaft 21 and rotates it in the sense of releasing the intermediate pawl 22, as has already been explained.
  • the selected flush starting position of the pin 46 with the upper part 3 has the advantage that a random undesired triggering of the circuit breaker 1 is excluded. Furthermore, the end face of the pin 46 is chosen so small that actuation without an auxiliary tool is out of the question.
  • the described device additionally triggers an automatic triggering of the circuit breaker 1 when the circuit breaker is used in a pluggable version in a switchgear and is pulled out of its isolating contacts, then only the blocking member 45 needs to be removed from the recess 44 of the lower part 4 to become.
  • the plunger 36 then comes out of the recess 44 with its foot part 43 under the action of the spring 42, the spring 42 relaxing.
  • the spring 31 is then able to overcome the reduced spring force of the spring 42 and thereby triggers the circuit breaker 1. In this way it is initially ruled out that the circuit breaker is brought into contact with its live mating contacts in the switchgear assembly and thereby endangers the Operating personnel can be caused.
  • the circuit breaker can only be switched on when it is fully inserted and thus rests with its underside on the mounting surface, as a result of which the plunger 36 is brought into a flush position with the underside of the lower part 4 with its base part 43.
  • the spring 42 is then so strongly tensioned that it overcomes the force of the spring 31 acting in the sense of release and in turn results in the position of the parts shown in FIG. 3.
  • the upper plunger 30 and the lower plunger 36 can each be produced in one piece from a plastic in the pressing or injection molding process. It is therefore inexpensive to provide parts, so that the combined device for manual triggering and additional inevitable triggering of pull-out switches can be used if necessary without significant increase in the cost of the switch.

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  • Breakers (AREA)

Abstract

1. An electric protective circuit breaker (1) comprising mobile switching components (12), an insulating housing (2) consisting of an upper component (3) and a lower component (4), a tripping defice for automatic disconnection by the release of interlocking mobile switching components (12), and a trigger element which is arranged on the upper component (3) of the insulating housing (2), which can be manually moved against the force of an energy store (42), and which cooperates with the tripping device, characterised by the following features : a first energy store (31) that biasses the trigger element in the trigger direction ; and an additional, more powerful energy store (42) that maintains the trigger element in its rest position against the force of the first energy store (31).

Description

Die Erfindung betrifft einen elektrischen Schutzschalter mit bewegbaren Schaltstücken, einem aus Oberteil und Unterteil bestehenden Isoliergehäuse, einem Auslöser zur selbsttätigen Abschaltung durch Freigabe der Verklinkung der bewegbaren Schaltstücke und einem an dem Oberteil des Isolierstoffgehäuses angebrachten, gegen die Wirkung eines Kraftspeichers von Hand bewegbaren, mit dem Auslöser zusammenwirkenden Auslöseorgan.The invention relates to an electrical circuit breaker with movable contact pieces, an insulating housing consisting of an upper part and a lower part, a trigger for automatic shutdown by releasing the latching of the movable contact pieces and an attached to the upper part of the insulating material housing, movable against the action of an energy accumulator by hand, with the Trigger cooperating trigger organ.

Ein Schutzschalter mit diesen Merkmalen ist beispielsweise durch die US-PS 3 895 205 bekannt geworden. Das von Hand zu betätigende Auslöseorgan dient zur Prüfung des Schutzschalters, ohne diesen dabei aus seinem Einbauort entfernen zu müssen. Der Erfindung liegt die Aufgabe zugrunde, Schutzschalter zusätzlich mit einer Einrichtung zu versehen, die eine Auslösung des Schutzschalters beim Abheben von seiner Montagefläche bewirkt, und ein vorhandenes Handauslöseorgan in diese Einrichtung einzubeziehen.A circuit breaker with these features has become known, for example, from US Pat. No. 3,895,205. The trigger element, which can be operated by hand, is used to test the circuit breaker without having to remove it from its installation location. The invention has for its object to provide circuit breakers with a device that triggers the circuit breaker when lifting from its mounting surface, and to include an existing manual release member in this device.

Diese Aufgabe wird bei einem Schutzschalter der eingangs genannten Art durch folgende Merkmale gelöst:

  • Ein erster Kraftspeicher spannt das Auslöseorgan in Auslöserichtung vor; ein weiterer stärkerer Kraftspeicher hält das Auslöseorgan entgegen der Wirkung des ersten Kraftspeichers in seiner Ruhelage. Hierdurch ist die Möglichkeit geschaffen, eine Lageänderung des stärkeren Kraftspeichers in Abhängigkeit von der Lage des Schutzschalters vorzusehen und dadurch dem ersten KraftSpeicher die Möglichkeit zu geben, das Auslöseorgan im Sinne der Auslösung zu betätigen.
With a circuit breaker of the type mentioned at the outset, this object is achieved by the following features:
  • A first energy accumulator pretensions the release element in the release direction; another stronger energy accumulator keeps the release member in its rest position against the action of the first energy accumulator. This creates the possibility of providing a change in position of the stronger energy accumulator depending on the position of the circuit breaker and thereby the first force To give memory the opportunity to actuate the trigger element in the sense of triggering.

Es empfiehlt sich dabei, die Abstützung des weiteren Kraftspeichers so zu wählen, daß dieser durch Abheben des Schutzschalters von seiner Montagefläche entspannbar und dann durch den ersten Kraftspeicher überwindbar ist. Hierzu kann in vorteilhafter Weise als dem Auslöseorgan gegenüberliegendes Widerlager des weiteren Kraftspeichers ein an der zur Befestigung des Schutzschalters dienenden Unterseite des Unterteiles endender Stößel dienen. Der Stößel stellt die zwangsläufige Betätigung der Einrichtung sicher.It is advisable to choose the support of the further energy accumulator so that it can be relaxed by lifting the circuit breaker from its mounting surface and then overcome by the first energy accumulator. For this purpose, a plunger ending on the underside of the lower part, which is used to fasten the circuit breaker, can advantageously serve as the abutment of the further energy accumulator opposite the trigger element. The plunger ensures the inevitable actuation of the device.

Um die Montage der Einrichtung zu erleichtern, kann das Auslöseorgan als in dem Oberteil des Isolierstoffgehäuses geradlinig verschiebbar gelagerter Stößel ausgebildet sein, der mit dem in dem Unterteil des Gehäuses geführten Stößel längsverschiebbar verbunden ist. Beide Stößel können nämlich dann mit den zugeordneten Kraftspeichern an dem Unterteil ces Gehäuses angebracht werden. Beim Aufsetzen des Oberteiles gelangt der obere Stößel in seine in dem Oberteil befindliche Führung.In order to facilitate the assembly of the device, the trigger element can be designed as a plunger which is mounted in a linearly displaceable manner in the upper part of the insulating material housing and which is connected in a longitudinally displaceable manner to the plunger guided in the lower part of the housing. Both plungers can then be attached to the lower part of the housing with the associated energy stores. When the upper part is put on, the upper plunger comes into its guide located in the upper part.

Die geradlinige relative Verschiebbarkeit der beiden Stößel zueinander kann durch folgende Merkmale erreicht werden:

  • Die Verbindung ist als Schnappverbindung ausgebildet; sie umfaßt einen scharfkantig hinterschnittenen zentralen Zapfen des im Unterteil des Gehäuses geführten Stößels und eine scharfkantig in einen Hohlraum mündende Öffnung des als Auslöseorgan dienenden Stößels. Die Schnappverbindung ist nach einer bei der Montage vorgenommenen Fügung nur noch gewaltsam trennbar. Sie widersteht daher den durch die Kraftspeicher aufgebrachten Kräften und bleibt infolgedessen auch bei einer Öffnung des Schutzschalters durch Abnehmen des Oberteiles des Isolierstoffgehäuses erhalten. In diesem Zusammenhang empfiehlt es sich, als Kraftspeicher die Stößel umschließende Schraubendruckfedern zu verwenden.
The straightforward relative displaceability of the two rams can be achieved by the following features:
  • The connection is designed as a snap connection; it comprises a sharp-edged undercut central pin of the plunger guided in the lower part of the housing and a sharp-edged opening of the plunger serving as a trigger element. The snap connection can only be separated by force after a joint has been made during assembly. It therefore resists the forces applied by the energy accumulator and consequently remains even when the circuit breaker is opened by removing the upper part of the Preserved insulating housing. In this context, it is advisable to use helical compression springs enclosing the plunger as a force accumulator.

Durch eine weitere Ausgestaltung der Erfindung kann dafür gesorgt werden, daß die Einrichtung gleichermaßen für Auslösung von Hand oder für Auslösung von Hand und zusätzliche selbsttätige Auslösung beim Abheben des Schutzschalters von seiner Montagefläche verwendbar ist. Hierzu kann der in dem Unterteil des Gehäuses geführte Stößel mit einem verbreiterten Fußteil versehen sein, und an der Unterseite des Unterteiles kann eine Ausnehmung zur Aufnahme des Fußteiles und eines den Stößel blockierenden, im Bedarfsfall anzubringenden Sperrgliedes angeordnet sein. Ist das Sperrglied, z. B. ein Federring, in die Ausnehmung eingelegt, so kann sich der in dem Unterteil geführte Stößel nicht bewegen und dient dann als ortsfestes Widerlager des einen Endes des stärkeren Kraftspeichers. Wird dagegen der Schutzschalter mit entferntem Sperrglied auf einer Montagefläche befestigt, so hat der in dem Unterteil geführte Stößel die Möglichkeit, beim Abheben des Schutzschalters von der Montagefläche unter der Wirkung des stärkeren Kraftspeichers an der Unterseite des Schalters herauszutreten, wobei sich die stärkere Kraftspeicherfeder entspannt. Die auf den im Oberteil geführten Stößel wirkende Kraftspeicherfeder vermag dann die verminderte Federkraft der stärkeren Kraftspeicherfeder zu überwinden und die Auslösung des Schutzschalters zu veranlassen.A further embodiment of the invention can ensure that the device can be used equally for manual triggering or manual triggering and additional automatic triggering when the circuit breaker is lifted from its mounting surface. For this purpose, the plunger guided in the lower part of the housing can be provided with a widened foot part, and on the underside of the lower part a recess can be arranged for receiving the foot part and a locking member which blocks the plunger and can be attached if necessary. Is the locking member, for. B. a spring washer, inserted into the recess, the plunger guided in the lower part can not move and then serves as a fixed abutment of one end of the stronger energy accumulator. If, on the other hand, the circuit breaker is attached to a mounting surface with the blocking element removed, the plunger guided in the lower part has the option of stepping out of the mounting surface under the effect of the stronger force accumulator on the underside of the switch when the circuit breaker is lifted, whereby the stronger force storage spring relaxes. The force storage spring acting on the plunger guided in the upper part is then able to overcome the reduced spring force of the stronger force storage spring and to trigger the circuit breaker.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.

Die Fig. 1 zeigt einen Niederspannungsschutzschalter mit Isolierstoffgehäuse und Kipphebelantrieb im Bereich der mittleren Polbahn im Schnitt.Fig. 1 shows a low-voltage circuit breaker with insulating housing and rocker arm drive in the region of the central pole track in section.

Der gleiche Schutzschalter ist in der Fig. 2 in der Draufsicht gezeigt.The same circuit breaker is shown in plan view in FIG. 2.

Eine Einrichtung gemäß der Erfindung ist als Schnitt III-III in Fig. 2 in der Fig. 3 gezeigt. Eine Einzelheit der Einrichtung ist vergrößert in der Fig. 4 dargestellt.A device according to the invention is shown as section III-III in Fig. 2 in Fig. 3. A detail of the device is shown enlarged in FIG. 4.

Der in der Fig. 1 gezeigte Schutzschalter 1 umfaßt ein aus einem Isolierstoff bestehendes Gehäuse 2, das ein Oberteil 3 und ein Unterteil 4 aufweist. Aus einer Öffnung 5 des Oberteiles 3 ragt ein Kipphebel 6 als Betätigungshandgriff heraus.The circuit breaker 1 shown in FIG. 1 comprises a housing 2 consisting of an insulating material, which has an upper part 3 and a lower part 4. From an opening 5 of the upper part 3, a rocker arm 6 protrudes as an operating handle.

Die Strombahn des Schutzschalters 1 erstreckt sich von einer unteren Anschlußvorrichtung 7 durch einen als Ganzes mit 10 bezeichneten Auslöser und von diesem durch ein biegsames Stromband 11 zu einem in der Ausschaltstellung gezeigten beweglichen Kontaktarm 12. Wird der Schutzschalter eingeschaltet, so erstreckt sich die Strombahn weiter von dem Kontaktarm 12 zu einer oberen Anschlußvorrichtung 13. Der Kontaktarm 12 ist gefedert an einem Träger 14 angebracht, der auf einer Schaltwelle 15 befestigt ist. Mit dem Träger 14 ist gelenkig der eine Hebel eines Kniehebelsystems 16 verbunden, an dessen Kniegelenk 17 eine Zugfeder 20 angreift. Das andere Ende der Zugfeder 20 ist durch den Kipphebel 6 derart verstellbar, daß das Kniehebelsystem 16 aus der dargestellten eingeknickten Stellung in die Strecklage gebracht werden kann, wodurch der Kontaktarm 12 in die Schließstellung überführt wird.The current path of the circuit breaker 1 extends from a lower connection device 7 through a trigger designated as a whole as 10 and from there through a flexible current band 11 to a movable contact arm 12 shown in the off position. If the circuit breaker is switched on, the current path extends further from the contact arm 12 to an upper connection device 13. The contact arm 12 is spring-mounted on a carrier 14 which is fastened on a switching shaft 15. A lever of a toggle lever system 16, on the knee joint 17 of which a tension spring 20 engages, is connected in an articulated manner to the carrier 14. The other end of the tension spring 20 is adjustable by the rocker arm 6 in such a way that the toggle lever system 16 can be brought into the extended position from the buckled position shown, as a result of which the contact arm 12 is transferred into the closed position.

Der Auslöser 10 umfaßt in bekannter Weise einen thermischen und einen elektromagnetischen Überstromauslöser. Beide wirken auf eine Auslösewelle 21, bei deren Verdrehung aus der dargestellten Ruhelage eine Zwischenklinke 22 und eine an dieser abgestützte Hauptklinke 23 freigegeben werden. Hierdurch wird die Abstützung des Kniehebelsystems 16 aufgehoben, so daß der Kontaktarm 12 auch bei gestreckten Kniehebeln in die dargestellte Ausschaltstellung gelangt.The trigger 10 comprises a thermal and an electromagnetic overcurrent release in a known manner. Both act on a release shaft 21, when it is rotated from the rest position shown, an intermediate pawl 22 and a main pawl 23 supported thereon be released. As a result, the support of the toggle lever system 16 is released, so that the contact arm 12 reaches the switch-off position shown even when the toggle levers are extended.

Der dargestellte Schutzschalter 1 ist dreipolig ausgebildet, wobei drei gleich ausgebildete Strombahnen in Kammern des Isolierstoffgehäuses 2 parallel zueinander angeordnet sind. Die Schaltwelle 15 verbindet dabei die Träger 14 der drei Pole. Der beschriebene Antriebs- und Auslösemechanismus ist jedoch nur in der mittleren Polbahn vorgesehen. Dagegen erstreckt sich die Auslösewelle 21 über alle Pole und ist von den Auslösern jedes Poles beeinflußbar.The circuit breaker 1 shown has a three-pole design, three identical current paths being arranged parallel to one another in chambers of the insulating material housing 2. The switching shaft 15 connects the carrier 14 of the three poles. The drive and release mechanism described is only provided in the middle pole track. In contrast, the trigger shaft 21 extends over all poles and can be influenced by the triggers of each pole.

Der Fig. 3 ist zu entnehmen, daß die Auslösewelle 21 einen Fortsatz 25 besitzt, dem im Ruhezustand mit einem Abstand 26 ein Ansatz 27 eines in dem Oberteil 3 geführten Stößels 30 gegenübersteht, der als von Hand zu betätigendes Auslöseorgan dient. Ein erster Kraftspeicher wird durch eine den Stößel 30 umschließende Schraubendruckfeder 31 gebildet, die sich mit ihrem einen Ende an dem Ansatz 27 und mit ihrem anderen Ende an einem Absatz 32 einer Ausnehmung 33 abstützt, die den Stößel 30 aufnimmt. Ein Querstift 34 dient so lange als Widerlager der Schraubendruckfeder 31, wie sich der Stößel 30 außerhalb des Schutzschalters 1 befindet.3 shows that the trigger shaft 21 has an extension 25, which in the rest state is at a distance 26 from an extension 27 of a plunger 30 guided in the upper part 3, which serves as a trigger element to be actuated by hand. A first energy accumulator is formed by a helical compression spring 31 which surrounds the plunger 30 and is supported at one end on the shoulder 27 and at the other end on a shoulder 32 of a recess 33 which receives the plunger 30. A cross pin 34 serves as an abutment of the helical compression spring 31 as long as the plunger 30 is outside the circuit breaker 1.

In einer Ausnehmung 35 des Unterteiles 4 ist ein weiterer Stößel 36 geführt, der an seinem dem oberen Stößel 30 zugewandten Ende verjüngt und mit einem scharfkantig hinterschnittenen, pilzförmigen Zapfen 37 versehen ist. Wie die Fig. 3 und insbesondere die Fig. 4 zeigt, befindet sich in der Gebrauchslage der Teile der Zapfen 37 in einer Ausnehmung 40 des oberen Stößels 30. Am unteren Ende des Stößels 30 ist eine Öffnung 38 vorgesehen, die so bemessen ist, daß der Zapfen 37 unter elastischer Dehnung des Werkstoffes des Stößels 30 durch die Öffnung hindurchgesteckt werden kann. Eine Trennung der beiden Stößel ist dann nur noch durch teilweise Zerstörung des Werkstoffes möglich, d. h. die Verbindung ist so widerstandsfähig, daß die beiden Stößel nach einmaliger Zusammenfügung zusammengehalten werden. Sie sind dann entsprechend der Länge der Ausnehmung 40 längsverschiebbar verbunden. (Fig. 4)A further tappet 36 is guided in a recess 35 of the lower part 4, which tapers at its end facing the upper tappet 30 and is provided with a mushroom-shaped pin 37 which is undercut with a sharp edge. As shown in FIG. 3 and in particular FIG. 4, the parts of the pin 37 are in a recess 40 in the upper plunger 30 in the position of use. At the lower end of the plunger 30 there is an opening 38 which is dimensioned such that the pin 37 under elastic Expansion of the material of the plunger 30 can be inserted through the opening. A separation of the two plungers is then only possible by partially destroying the material, ie the connection is so resistant that the two plungers are held together after a single assembly. They are then connected in a longitudinally displaceable manner in accordance with the length of the recess 40. (Fig. 4)

Eine zufällige Verdrehung des oberen Stößels 30 bei Abnahme des Oberteiles 3 des Gehäuses 2 wird durch einen an den Stößel 30 angeformten Lappen 39 verhindert, der in die Ausnehmung 35 des Unterteiles 4 eintaucht und an einer Wand dieser Ausnehmung geführt ist. Das Zusammenwirken zwischen dem Ansatz 27 und der Auslösewelle 21 ist dadurch auch beim Abnehmen und anschließendem Aufsetzen des Oberteiles 3 sichergestellt.Accidental rotation of the upper plunger 30 when the upper part 3 of the housing 2 is removed is prevented by a flap 39 formed on the plunger 30, which plunges into the recess 35 of the lower part 4 and is guided on a wall of this recess. The interaction between the extension 27 and the trigger shaft 21 is thereby ensured even when the upper part 3 is removed and then put on.

Zwischen einem Absatz 41 des Stößels 36 und der Endfläche des Stößels 30 ist eine weitere Schraubendruckfeder 42 eingesetzt. Sie bildet den stärkeren Kraftspeicher, während die Schraubendruckfeder 31 den schwächeren Kraftspeicher bildet, der den Stößel 30 im Sinne der Betätigung der Auslösewelle 21 vorspannt. An seinem unteren Ende ist der Stößel 36 mit einem Fußteil 43 versehen, das in der in Fig. 3 gezeigten Ruhelage des Stößels 36 in einer Ausnehmung 44 an der Unterseite des Unterteiles 4 aufgenommen ist. Ein als Sperrglied dienender Federring 45 ist ebenfalls in die Ausnehmung 44 eingelegt und sichert den Stößel 36 gegen jede Verschiebung.Another helical compression spring 42 is inserted between a shoulder 41 of the plunger 36 and the end face of the plunger 30. It forms the stronger energy accumulator, while the helical compression spring 31 forms the weaker energy accumulator, which prestresses the plunger 30 in the sense of actuating the trigger shaft 21. At its lower end, the plunger 36 is provided with a foot part 43 which, in the rest position of the plunger 36 shown in FIG. 3, is received in a recess 44 on the underside of the lower part 4. A spring ring 45 serving as a locking member is also inserted into the recess 44 and secures the tappet 36 against any displacement.

Die beschriebene Einrichtung wirkt in folgender Weise: Ausgehend von der in Fig. 3 gezeigten Lage der Teile läßt sich der Stößel 30 mit seinem oberen Zapfen 46, der mit der Oberfläche des Oberteiles 3 bündig abschließt, durch Benutzung eines Hilfswerkzeuges, z. B. eines Stiftes oder Schraubendrehers, niederdrücken. Unter Überwindung der Kraft der Schraubenfeder 42 gelangt dabei der Ansatz 27 zur Anlage an dem Fortsatz 25 der Auslösewelle 21 und verdreht diese dabei im Sinne der Freigabe der Zwischenklinke 22, wie dies bereits erläutert wurde. Die gewählte bündige Ausgangsstellung des Zapfens 46 mit dem Oberteil 3 hat dabei den Vorteil, daß eine zufällige nicht erwünschte Auslösung des Schutzschalters 1 ausgeschlossen ist. Ferner ist die Stirnfläche des Zapfens 46 so gering gewählt, daß eine Betätigung ohne Hilfswerkzeug nicht in Betracht kommt.The device described works in the following way: starting from the position of the parts shown in Fig. 3, the plunger 30 with its upper pin 46, which is flush with the surface of the upper part 3, by using an auxiliary tool, for. B. a pen or screwdriver. Overcoming the Due to the force of the helical spring 42, the shoulder 27 comes to rest on the extension 25 of the release shaft 21 and rotates it in the sense of releasing the intermediate pawl 22, as has already been explained. The selected flush starting position of the pin 46 with the upper part 3 has the advantage that a random undesired triggering of the circuit breaker 1 is excluded. Furthermore, the end face of the pin 46 is chosen so small that actuation without an auxiliary tool is out of the question.

Ist es erwünscht, daß die beschriebene Einrichtung zusätzlich eine selbsttätige Auslösung des Schutzschalters 1 veranlaßt, wenn der Schutzschalter in einer steckbaren Ausführung in einer Schaltanlage benutzt wird und aus seinen Trennkontakten herausgezogen wird, so braucht lediglich das Sperrglied 45 aus der Ausnehmung 44 des Unterteiles 4 herausgenommen zu werden. Der Stößel 36 tritt dann unter der Wirkung der Feder 42 mit seinem Fußteil 43 aus der Ausnehmung 44 heraus, wobei sich die Feder 42 entspannt. Die Feder 31 vermag dann die verminderte Federkraft der Feder 42 zu überwinden und bewirkt dadurch die Auslösung des Schutzschalters 1. Auf diese Weise ist zunächst ausgeschlossen, daß der Schutzschalter in eingeschaltetem Zustand in der Schaltanlage mit seinen spannungführenden Gegenkontakten in Berührung gebracht und dadurch eine Gefährdung des Bedienungspersonals hervorgerufen werden kann. Der Schutzschalter kann erst dann eingeschaltet werden, wenn er vollständig eingeschoben ist und dadurch mit seiner Unterseite auf der Montagefläche aufliegt, wodurch der Stößel 36 mit seinem Fußteil 43 in eine bündige Stellung mit der Unterseite des Unterteiles 4 gebracht wird. Die Feder 42 ist dann so stark gespannt, daß sie die im Auslösesinn wirkende Kraft der Feder 31 überwindet und sich wiederum die in der Fig. 3 gezeigte Lage der Teile ergibt.If it is desired that the described device additionally triggers an automatic triggering of the circuit breaker 1 when the circuit breaker is used in a pluggable version in a switchgear and is pulled out of its isolating contacts, then only the blocking member 45 needs to be removed from the recess 44 of the lower part 4 to become. The plunger 36 then comes out of the recess 44 with its foot part 43 under the action of the spring 42, the spring 42 relaxing. The spring 31 is then able to overcome the reduced spring force of the spring 42 and thereby triggers the circuit breaker 1. In this way it is initially ruled out that the circuit breaker is brought into contact with its live mating contacts in the switchgear assembly and thereby endangers the Operating personnel can be caused. The circuit breaker can only be switched on when it is fully inserted and thus rests with its underside on the mounting surface, as a result of which the plunger 36 is brought into a flush position with the underside of the lower part 4 with its base part 43. The spring 42 is then so strongly tensioned that it overcomes the force of the spring 31 acting in the sense of release and in turn results in the position of the parts shown in FIG. 3.

Der obere Stößel 30 und der untere Stößel 36 lassen sich jeweils einstückig aus einem Kunststoff im Preß-oder Spritzverfahren herstellen. Es handelt sich daher um preiswert bereitstellbare Teile, so daß die kombinierte Einrichtung für Handauslösung und zusätzliche zwangsläufige Auslösung bei ausziehbaren Schaltern im Bedarfsfall ohne wesentliche Verteuerung des Schalters anwendbar ist.The upper plunger 30 and the lower plunger 36 can each be produced in one piece from a plastic in the pressing or injection molding process. It is therefore inexpensive to provide parts, so that the combined device for manual triggering and additional inevitable triggering of pull-out switches can be used if necessary without significant increase in the cost of the switch.

Claims (8)

1. Elektrischer Schutzschalter mit bewegbaren Schaltstücken, einem aus Oberteil und Unterteil bestehenden Isolierstoffgehäuse, einem Auslöser zur selbsttätigen Abschaltung durch Freigabe der Verklinkung der bewegbaren Schaltstücke und einem an dem Oberteil des Isolierstoffgehäuses angebrachten, gegen die Wirkung eines Kraftspeichers von Hand bewegbaren, mit dem Auslöser zusammenwirkenden Auslöseorgan,
gekennzeichnet durch folgende Merkmale: ein erster Kraftspeicher (31) spannt das Auslöseorgan (30) in Auslöserichtung vor; ein weiterer stärkerer Kraftspeicher (42) hält das Auslöseorgan entgegen der Wirkung des ersten Kraftspeichers (30) in seiner Ruhelage. 1. Electrical circuit breaker with movable contact pieces, an insulating housing consisting of an upper part and a lower part, a trigger for automatic shutdown by releasing the latch of the movable contacts and a trigger element attached to the upper part of the insulating material housing, which can be moved by hand against the action of an energy accumulator and cooperates with the trigger,
characterized by the following features: a first energy accumulator (31) pretensions the trigger element (30) in the triggering direction; a further, more powerful energy store (42) holds the release member in its rest position against the action of the first energy store (30). 2. Schutzschalter nach Anspruch 1, dadurch gekennzeichnet, daß der weitere Kraftspeicher (42) durch Abheben des Schutzschalters (1) von seiner Montagefläche entspannbar und dann durch den ersten Kraftspeicher (31) überwindbar ist.2. Circuit breaker according to claim 1, characterized in that the further energy accumulator (42) can be relaxed by lifting the circuit breaker (1) from its mounting surface and then overcome by the first energy accumulator (31). 3. Schutzschalter nach Anspruch 2, dadurch gekennzeichnet, daß als dem Auslöseorgan (30) gegenüberliegendes Widerlager des weiteren Kraftspeichers (42) ein an der Unterseite des Unterteiles (4) des Isolierstoffgehäuses (2) endender Stößel (36) dient.3. Circuit breaker according to claim 2, characterized in that serves as the trigger member (30) opposite abutment of the further energy accumulator (42) on the underside of the lower part (4) of the insulating housing (2) ending plunger (36). 4. Schutzschalter nach Anspruch 3, dadurch gekennzeichnet, daß das Auslöseorgan (30) als in dem Oberteil (3) des Isolierstoffgehäuses (2) geradlinig verschiebbar gelagerter Stößel (30) ausgebildet ist, der mit dem in dem Unterteil (4) geführten Stößel (36) längsverschiebbar verbunden ist.4. Circuit breaker according to claim 3, characterized in that the trigger member (30) as in the upper part (3) of the insulating housing (2) linearly displaceably mounted plunger (30) is formed, which is longitudinally displaceably connected to the plunger (36) guided in the lower part (4). 5. Schutzschalter nach Anspruch 4, gekennzeichnet durch folgende Merkmale:
die Verbindung ist als Schnappverbindung ausgebildet; sie umfaßt einen scharfkantig hinterschnittenen, zentralen Zapfen (37) des in dem Unterteil (4) des Isolierstoffgehäuses (2) geführten Stößels (36) und
eine scharfkantig in einen Hohlraum (40) mündende Öffnung (38) des als Auslöseorgan dienenden Stößels (30).5. Circuit breaker according to claim 4, characterized by the following features:
the connection is designed as a snap connection; it comprises a central pin (37) which is undercut with a sharp edge and is guided in the plunger (36) and which is guided in the lower part (4) of the insulating material housing (2)
a sharp-edged opening (38) of a plunger (30) serving as a trigger element opening into a cavity (40). 6. Schutzschalter nach den Ansprüchen 1, 3 und 4, dadurch gekennzeichnet, daß als Kraftspeicher die Stößel (30, 36) umschließende Schraubendruckfedern (31, 42) dienen.6. Circuit breaker according to claims 1, 3 and 4, characterized in that the plunger (30, 36) enclosing helical compression springs (31, 42) serve as the energy store. 7. Schutzschalter nach Anspruch 3, dadurch gekennzeichnet, daß der in dem Unterteil (4) des Isolierstoffgehäuses (2) geführte Stößel (36) mit einem verbreiterten Fußteil (43) versehen ist und daß an der Unterseite des Unterteiles (4) eine Ausnehmung (44) zur Aufnahme des Fußteiles (43) und eines den Stößel (36) blockierenden, im Bedarfsfall anzubringenden Sperrgliedes (45) angeordnet ist.7. Circuit breaker according to claim 3, characterized in that the plunger (36) guided in the lower part (4) of the insulating material housing (2) is provided with a widened foot part (43) and that on the underside of the lower part (4) there is a recess ( 44) for receiving the foot part (43) and a locking member (45) blocking the plunger (36) and, if necessary, to be attached. 8. Schutzschalter nach Anspruch 4, dadurch gekennzeichnet, daß der in dem Oberteil (3) geführte Stößel (30) einen Lappen (39) besitzt, der als Sicherung gegen eine Verdrehung an einer Wandfläche einer den im Unterteil (4) geführten Stößel (36) aufnehmenden Ausnehmung (35) geführt ist.8. Circuit breaker according to claim 4, characterized in that the plunger (30) guided in the upper part (3) has a tab (39) which, as a safeguard against rotation on a wall surface, has a plunger (36) guided in the lower part (4) ) receiving recess (35) is guided.
EP80730052A 1980-02-29 1980-07-29 Protective switch with a release operable by hand Expired EP0035083B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80730052T ATE3226T1 (en) 1980-02-29 1980-07-29 CIRCUIT BREAKER WITH HAND-MOVABLE TRIP ELEMENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3008249A DE3008249C2 (en) 1980-02-29 1980-02-29 Circuit breaker with a manually movable trigger
DE3008249 1980-02-29

Publications (2)

Publication Number Publication Date
EP0035083A1 true EP0035083A1 (en) 1981-09-09
EP0035083B1 EP0035083B1 (en) 1983-05-04

Family

ID=6096227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80730052A Expired EP0035083B1 (en) 1980-02-29 1980-07-29 Protective switch with a release operable by hand

Country Status (4)

Country Link
EP (1) EP0035083B1 (en)
JP (1) JPS56136428A (en)
AT (1) ATE3226T1 (en)
DE (1) DE3008249C2 (en)

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EP0227586A1 (en) * 1985-12-20 1987-07-01 Siemens Aktiengesellschaft Electrical switching arrangement with a draw-in frame and a switching apparatus fittable therein
EP0354048A2 (en) * 1988-08-03 1990-02-07 Eaton Corporation Circuit breaker trip bar interlock
EP0411871A2 (en) * 1989-08-04 1991-02-06 Eaton Corporation Trip interlock design
EP0419276A2 (en) * 1989-09-22 1991-03-27 Eaton Corporation Adjustable circuit breaker with draw out interlock
US5719363A (en) * 1995-04-08 1998-02-17 Klockner-Moeller Gmbh Mechanical switching device such as a circuit breaker and a safety device for the circuit breaker
EP2254137A1 (en) * 2009-05-21 2010-11-24 LS Industrial Systems Co., Ltd Move-out type interlock apparatus for circuit breaker

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DE3037355C2 (en) * 1980-09-30 1982-11-04 Siemens AG, 1000 Berlin und 8000 München Compact design circuit breaker with a trip pin
DE3526336A1 (en) * 1985-07-23 1987-01-29 Weber Ag Fab Elektro Two-pole protection circuit breaker having a mechanical safety trip device
DE8905506U1 (en) * 1989-05-02 1990-09-06 Siemens AG, 1000 Berlin und 8000 München Manually operated circuit breaker
JP3399126B2 (en) * 1994-12-28 2003-04-21 三菱電機株式会社 Circuit breaker
KR20010108005A (en) * 1999-10-07 2001-12-07 다니구찌 이찌로오, 기타오카 다카시 Plug-in circuit breaker
DE102004001939A1 (en) * 2004-01-14 2005-08-04 Abb Patent Gmbh Electrical switching device

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227586A1 (en) * 1985-12-20 1987-07-01 Siemens Aktiengesellschaft Electrical switching arrangement with a draw-in frame and a switching apparatus fittable therein
EP0354048A2 (en) * 1988-08-03 1990-02-07 Eaton Corporation Circuit breaker trip bar interlock
EP0354048A3 (en) * 1988-08-03 1991-02-27 Eaton Corporation Circuit breaker trip bar interlock
EP0411871A2 (en) * 1989-08-04 1991-02-06 Eaton Corporation Trip interlock design
EP0411871A3 (en) * 1989-08-04 1992-04-08 Westinghouse Electric Corporation Trip interlock design
AU638036B2 (en) * 1989-08-04 1993-06-17 Westinghouse Electric Corporation Trip interlock design
EP0419276A2 (en) * 1989-09-22 1991-03-27 Eaton Corporation Adjustable circuit breaker with draw out interlock
EP0419276A3 (en) * 1989-09-22 1992-03-25 Westinghouse Electric Corporation Adjustable circuit breaker with draw out interlock
US5719363A (en) * 1995-04-08 1998-02-17 Klockner-Moeller Gmbh Mechanical switching device such as a circuit breaker and a safety device for the circuit breaker
EP2254137A1 (en) * 2009-05-21 2010-11-24 LS Industrial Systems Co., Ltd Move-out type interlock apparatus for circuit breaker
US8173916B2 (en) 2009-05-21 2012-05-08 Ls Industrial Systems Co., Ltd. Move-out type interlock apparatus for circuit breaker

Also Published As

Publication number Publication date
ATE3226T1 (en) 1983-05-15
EP0035083B1 (en) 1983-05-04
DE3008249A1 (en) 1981-09-10
DE3008249C2 (en) 1984-04-12
JPS56136428A (en) 1981-10-24

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