EP1266389B1 - Combined tripping device for a circuit-breaker - Google Patents

Combined tripping device for a circuit-breaker Download PDF

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Publication number
EP1266389B1
EP1266389B1 EP01931535A EP01931535A EP1266389B1 EP 1266389 B1 EP1266389 B1 EP 1266389B1 EP 01931535 A EP01931535 A EP 01931535A EP 01931535 A EP01931535 A EP 01931535A EP 1266389 B1 EP1266389 B1 EP 1266389B1
Authority
EP
European Patent Office
Prior art keywords
lever
circuit breaker
accordance
tripping
blow
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
Application number
EP01931535A
Other languages
German (de)
French (fr)
Other versions
EP1266389A1 (en
Inventor
Walter Felden
Matthias Reichard
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.)
AEG Niederspannungstechnik GmbH and Co KG
Original Assignee
AEG Niederspannungstechnik GmbH and Co KG
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Filing date
Publication date
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Publication of EP1266389A1 publication Critical patent/EP1266389A1/en
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Publication of EP1266389B1 publication Critical patent/EP1266389B1/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a combined tripping device for a circuit breaker.
  • a trip device which uses a magnetic system.
  • a magnetic field is generated with the current to be monitored, which exerts a magnetic force on an armature.
  • the armature moves to a release position and actuates a cut-off device which disconnects the contacts of the circuit breaker.
  • circuit breakers equipped with contacts for rapid shutdown by electrodynamic repulsion in the event of a short circuit.
  • quick shutdown creates an arc drawn between the contacts, which causes a rapid increase in pressure in the housing receiving the contacts.
  • the housing With the housing is a pressure chamber connected, which is closed by a movable piston. Following the increase in pressure in the housing and the pressure chamber, the piston is displaced and acts on exceeding a predetermined pressure on a turn-off, which turns off the circuit breaker.
  • a circuit breaker which has a rotatable lever with a lever arm which is associated with a magnet system.
  • the lever arm has further formed in its the pivot point of the lever facing away from a storage surface, which projects into a blow-out, which is associated with a splitter stack.
  • the invention has for its object to provide a reliable tripping device for circuit breakers, the combined pressure surge and / or magnetic release with little effort to different tripping forces and conditions is adaptable.
  • Fig. 1 shows a perspective view of a circuit breaker assembly 1, which with a Shutdown device 40 and a generally designated 20 triggering device is provided.
  • the circuit breaker assembly has a housing 50 to which the shutdown device 40 and the trip device 20 are attached.
  • the shutdown device 40 and the triggering device 20 are operatively connected via a tripping shaft 2.
  • An actuation of the trip shaft 2 triggers the shutdown device 40, which interrupts the circuit to be switched.
  • the shut-off device also has a mechanism that allows the contacts to be closed again after the circuit breaker has tripped and the cause for tripping has been removed.
  • Fig. 3 shows the housing 50, which is assembled from two housing halves.
  • the housing 50 encloses a cavity in which the electrical elements 30, 32, 34, 28 of the circuit breaker are accommodated.
  • the housing has various bearing points for elements to be stored, which will be explained later.
  • Generally means mounted on the housing in the following description that corresponding bearing pins, openings etc. are formed on the housing.
  • the housing is made of an insulating material, preferably made of a plastic.
  • the circuit breaker has a housing on which the triggering device is mounted (right side in Fig. 3). In the case is a arranged on a rotor rotatably held contact bridge 32 which is rotatable clockwise and counterclockwise.
  • the contact bridge has movable contacts 30 at its two ends, which can interact with fixed contacts 34.
  • the contact bridge contrary to the illustration in FIG. 3, is rotated by approximately 90 ° in the counterclockwise direction, so that the movable contact 30 is in contact with the fixed contact 34.
  • a current conductor (not shown) is provided which also has a fixed contact which is in abutment with the other movable contact of the contact bridge 32 when the aforementioned contacts 30, 34 are closed.
  • the current to be switched by the power switch consequently flows through the contact bridge 32.
  • Fig. 3 shows a triggering shaft 2 at the top right, which cooperates with a shutdown, not shown, which will be explained later. It can be seen that on the trip shaft 2 of the triggering device, a stop 16 is formed, which may lie in the path of movement of a lever 6 of the triggering device. The function of the triggering device will be explained later.
  • each contact pair is associated with an arc quenching chamber 28.
  • the arc quenching chamber is provided with suitable plates (Dioneblechen), which are substantially parallel are arranged to each other in the chamber and are denoted by 282 in Fig. 3.
  • the rotor or the contact bridge 32 are loaded by springs in the respective end position, i. E. during rotation, the rotor exceeds a point of greatest spring deflection, resulting in a bistable configuration.
  • the contact bridge 32 is held by spring force in the closed position or in the open position. This is important for the function of the circuit breaker in that, when an overcurrent occurs, a separation of the contacts can take place from one another, as will be explained later.
  • the switch-off process will now be explained in more detail in anticipation of FIG.
  • the shut-off device (not shown) forms a latch mechanism, a switch lock or the like, which can rotate the rotatable contact bridge 32 in the case of release clockwise.
  • the triggered condition is shown in FIG.
  • the triggering device 20 has in addition to the trip shaft 2, a current conductor 14 encompassing yoke 8, the legs of which are facing an armature or lever 6.
  • the lever 6 is rotatably mounted about a pivot point 12. As can be clearly seen in Fig. 2, the lever 6 is extended beyond the pivot point 12 and forms a storage area 10.
  • the storage area is associated with a blow-out 26, which will be explained later.
  • Fig. 2 shows a bimetallic element 18 which is arranged substantially parallel to a vertical in Fig. 2 portion of the current conductor 14 and can engage with a projection 22 of the trip shaft 2 in engagement.
  • Fig. 3 starting from the closed state of the contacts 30, 34, the trip operation will be explained.
  • a current flowing through the current conductor 14 generates a magnetic field around the current conductor, which is directed and amplified by the yoke 8, so that a magnetic force in the direction of the arrow A is exerted on the lever 6.
  • the lever 6 If the current in the current conductor 14 exceeds a predetermined value, the lever 6 is deflected against the force of the spring 24 by the magnetic force between the yoke and lever 6 so far that it abuts against the stop 16 of the trip shaft 2. This causes rotation of the trip shaft 2, which triggers the shutdown device 40 ( Figures 1 and 2) and shuts off the power switch as previously described.
  • the contacts 30, 34 are pressed apart directly by electrodynamic repulsion.
  • the electrodynamic repulsion is carried out by the magnetic fields around the current conductor 14 (lower horizontal section) and arranged parallel to the conductor 14 contact bridge 32 when the fixed contact 34 and the movable contact 30 are closed at the contact bridge 32.
  • current conductor 14 and contact bridge 32 current conductor 14 and contact bridge 32
  • Around the conductors arise magnetic fields in the same direction, which repel each other.
  • the closing force is applied by a spring mechanism.
  • the contact bridge 32 is turned a little clockwise. In this case, an arc is spanned between the contacts 30, 34, which bridges the gap formed between the contacts.
  • Each contact pair 30, 34 is associated with an arc quenching chamber 28 to prevent excessive propagation of the arc, or to delete this quickly.
  • the pressure of the air or the gas in the quenching chamber 28 is abruptly increased (about 0.5 ms).
  • the pressure in the arc quenching chamber 28 can be released through the exhaust duct 26 to the environment. This pressure reduction takes place by a pressure surge (arrow P) or a pressure wave, which passes through the blow-out 26 very quickly.
  • the storage area 10 of the lever 6 is arranged in the exhaust passage 26 and is acted upon by the pressure surge.
  • the kinetic energy of the pressure wave, i. of the medium flowing in the blow-out channel 26 is converted into a dynamic pressure on the side of the storage surface 10 facing the arc-quenching chamber 28.
  • the standard pressure is higher than the prevailing on the back of the storage area 10 static pressure. Following a force generated by this pressure difference (arrow B) on the storage surface 10, the lever 6 is deflected in the release direction.
  • the storage area can also be arranged outside the discharge channel in the vicinity of the outlet opening. It is sufficient if the pressure wave hits the storage area with sufficient speed.
  • the two aforementioned triggering or tripping forces occur simultaneously, so that the triggering is additionally supported by the force acting between the lever 6 and yoke 8 magnetic force by the release force due to the pressure surge on the storage area 10 of the lever 6.
  • the opposite forces (arrows A and B) act on two different sides of the pivot point 12 on the lever 6 and add up to a total moment about the pivot point 12, which is available for the deflection of the lever. This increases the torque available to overcome the moment of inertia of the lever that increases with the faster movement of the lever.
  • the circuit breaker or circuit breaker assembly shown in FIGS. 1 to 3 further has an overload protection provided with a bimetallic element 18.
  • the bimetallic element 18 is arranged parallel to a vertical in Fig. 2 section of the current conductor 14 as shown in FIG. If a current (overload) is constantly flowing through the current conductor 14, which is too low to initiate the magnetic or the combined triggering of magnetic release and pressure surge, but is higher than the desired current, the conductor 14 is gradually heated.
  • the heated conductor 14 outputs a portion of its heat to the bimetallic element 18 arranged closely next to it.
  • the bimetallic element 18 heated in this way bends to the left in FIG. 2 and actuates the triggering shaft 2 by means of the projection 22 in the triggering direction.
  • FIG. 4 A modified form of the triggering device is shown in FIG.
  • the same reference numerals designate functionally identical parts or elements as in FIGS. 1 to 3.
  • the modification shown in FIG. 4 differs from the preceding triggering device only by another form of heating of the bimetal element 18.
  • the external conductor or the terminal 38 is connected to the bimetallic element 18 via a line 36.
  • the bimetallic element 18 is electrically connected to the current conductor 14 in the region of its lower end in FIG. 4.
  • the current conductor 14 passes through the yoke 8 and operates in the same manner as previously described in detail with reference to FIGS. 1 to 3.
  • the bimetal element 18 is traversed by the current to be monitored and is heated directly by this stream.
  • the current through the bimetallic element becomes too large, the temperature of the bimetal element exceeds the tripping value and the bimetallic element 18 bends to rotate the tripping shaft 2 to trip the tripping device 40.
  • steel dion plates 282 are disposed to extinguish the arc.
  • the plates 282 are arranged parallel to each other obliquely in the housing and thus serve to better guide the expanding by the arc gases in the direction of the exhaust passage 26.
  • the effect of the pressure wave or the pressure surge can be amplified.
  • the driver portion of the lever 6 and the stopper 16 allow actuation of the trip shaft 2 in the release direction regardless of a movement of the lever 6.
  • another type of triggering for example by the bimetal 18 without affecting the rest of the triggering device.
  • suitable means drag lever and viewing window or the like
  • the storage area is formed by simply extending the lever 6 beyond the fulcrum 12 addition.
  • the triggering device can be achieved by a simple design measure, without increasing the number of components.
  • the storage area may be designed as a flap closing the blow-off channel, which prevents the ingress of foreign materials.
  • a multi-pole circuit breaker can be realized by a parallel arrangement of a corresponding number of circuit breaker assemblies, wherein the shutdown device can be associated with one, several or all poles.
  • the tripping shaft may be configured to switch off only one pole, multiple poles or all poles with a tripping device.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Circuit Breakers (AREA)
  • Toys (AREA)

Abstract

The device (1) has contacts in a housing (50) that are separated by triggering a switch-off device (40), an associated expulsion channel (26), a lever (6) that interacts with the switch-off device, a magnet system (8,14) acting on the lever to deflect the lever to trigger the switch-off device and a build-up surface (10) on the lever associated with the expulsion channel to assist lever deflection as a result of a pressure step in the expulsion channel.

Description

Die Erfindung bezieht sich auf eine kombinierte Auslösevorrichtung für einen Leistungsschalter.The invention relates to a combined tripping device for a circuit breaker.

Damit Leistungsschalter Leitungen gegen Kurzschlussströme schützen können, ist eine Auslösevorrichtung vorgesehen, die ein magnetisches System verwendet. In solchen Systemen wird mit dem zu überwachenden Strom ein Magnetfeld erzeugt, das eine Magnetkraft auf einen Anker ausübt. Wenn die Magnetkraft groß genug wird, bewegt sich der Anker in eine Auslösestellung und betätigt eine Abschaltvorrichtung, die die Kontakte des Leistungsschalters trennt.In order for circuit breakers to protect lines against short-circuit currents, a trip device is provided which uses a magnetic system. In such systems, a magnetic field is generated with the current to be monitored, which exerts a magnetic force on an armature. When the magnetic force becomes large enough, the armature moves to a release position and actuates a cut-off device which disconnects the contacts of the circuit breaker.

Bei sehr großen Stromspitzen kann es jedoch vorkommen, dass die magnetische Auslösung nicht schnell genug erfolgt. Dadurch kann es zu Beschädigungen des Leistungsschalters selbst sowie der nachgeordneten Einrichtungen kommen.At very high current peaks, however, it may happen that the magnetic release is not fast enough. This can cause damage to the circuit breaker itself and the downstream devices.

Ferner gibt es Leistungsschalter, die mit Kontakten zur Schnellabschaltung durch elektrodynamische Abstoßung im Kurzschlussfall ausgerüstet sind. Im Fall der Schnellabschaltung entsteht ein zwischen den Kontakten gezogener Lichtbogen, der einen schnellen Druckanstieg in dem die Kontakte aufnehmenden Gehäuse bewirkt. Mit dem Gehäuse ist eine Druckkammer verbunden, die mit einem bewegbaren Kolben verschlossen ist. Dem Druckanstieg im Gehäuse und der Druckkammer folgend wird der Kolben verschoben und wirkt bei Überschreiten eines vorgegebenen Drucks auf eine Abschalteinrichtung ein, die den Leistungsschalter abschaltet.There are also circuit breakers equipped with contacts for rapid shutdown by electrodynamic repulsion in the event of a short circuit. In the case of the quick shutdown creates an arc drawn between the contacts, which causes a rapid increase in pressure in the housing receiving the contacts. With the housing is a pressure chamber connected, which is closed by a movable piston. Following the increase in pressure in the housing and the pressure chamber, the piston is displaced and acts on exceeding a predetermined pressure on a turn-off, which turns off the circuit breaker.

Der Druckanstieg durch den Lichtbogen ist sehr schnell, jedoch erfordert die Gestaltung einer Druckkammer mit einem dichtenden und verschiebbaren Kolben einen entsprechenden technischen Aufwand für die Einhaltung erforderlicher Maßtoleranzen, größere Gehäuseabmessungen und ein entsprechend druckfestes Gehäuse.The pressure increase through the arc is very fast, but the design of a pressure chamber with a sealing and displaceable piston requires a corresponding technical effort for compliance with required dimensional tolerances, larger housing dimensions and a correspondingly pressure-resistant housing.

Aus der gattungsbildenden US 3,631, 369 ist ein Leitungsschutzschalter bekannt, der einen drehbaren Hebel mit einem Hebelarm hat, der einem Magnetsystem zugeordnet ist. Der Hebelarm hat in seiner dem Drehpunkt des Hebels abgewandten Verlängerung ferner eine Staufläche ausgebildet, die in einen Ausblaskanal ragt, der einem Löschblechpaket zugeordnet ist.From the generic US 3,631,369 a circuit breaker is known which has a rotatable lever with a lever arm which is associated with a magnet system. The lever arm has further formed in its the pivot point of the lever facing away from a storage surface, which projects into a blow-out, which is associated with a splitter stack.

Der Erfindung liegt die Aufgabe zugrunde, eine zuverlässige Auslösevorrichtung für Leistungsschalter zu schaffen, deren kombinierte Druckstoß- und/oder Magnetauslösung mit geringem Aufwand an verschiedene Auslösekräfte und -verhältnisse anpassbar ist.The invention has for its object to provide a reliable tripping device for circuit breakers, the combined pressure surge and / or magnetic release with little effort to different tripping forces and conditions is adaptable.

Diese Aufgabe wird mit einem Leistungsschalter mit einer Auslösevorrichtung mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with a circuit breaker with a tripping device having the features of patent claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Die Erfindung wird nachfolgend anhand bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung näher erläutert. Darin zeigt:

  • Fig. 1 eine Perspektivansicht einer Leistungsschalterbaugruppe mit einer Auslösevorrichtung gemäß einem Ausführungsbeispiel der Erfindung;
  • Fig. 2 eine Seitenansicht von Fig. 1;
  • Fig. 3 eine seitliche Schnittansicht von Fig. 2, die die Ansicht von der abgewandten Seite der Leistungsschalterbaugruppe aus Fig. 2 zeigt; und
  • Fig. 4 eine Seitenansicht analog Fig. 2 einer Leistungsschalterbaugruppe mit einer modifizierten Auslösevorrichtung.
The invention will be explained in more detail below with reference to preferred embodiments with reference to the drawing. It shows:
  • 1 is a perspective view of a circuit breaker assembly with a tripping device according to an embodiment of the invention;
  • Fig. 2 is a side view of Fig. 1;
  • FIG. 3 is a side sectional view of FIG. 2 showing the opposite side view of the circuit breaker assembly of FIG. 2; FIG. and
  • Fig. 4 is a side view similar to Fig. 2 of a circuit breaker assembly with a modified release device.

Fig. 1 zeigt eine Perspektivansicht einer Leistungsschalterbaugruppe 1, die mit einer Abschaltvorrichtung 40 und einer allgemein mit 20 bezeichneten Auslösevorrichtung versehen ist. Die Leistungsschalterbaugruppe hat ein Gehäuse 50, an dem die Abschaltvorrichtung 40 und die Auslösevorrichtung 20 angebracht sind. Die Abschaltvorrichtung 40 und die Auslösevorrichtung 20 sind über eine Auslösewelle 2 wirkverbunden. Eine Betätigung der Auslösewelle 2 löst die Abschaltvorrichtung 40 aus, die den zu schaltenden Stromkreis unterbricht. Die Abschaltvorrichtung hat ferner einen Mechanismus, mit dem die Kontakte wieder geschlossen werden können, nachdem der Leistungsschalter ausgelöst wurde und der Grund für die Auslösung beseitigt wurde.Fig. 1 shows a perspective view of a circuit breaker assembly 1, which with a Shutdown device 40 and a generally designated 20 triggering device is provided. The circuit breaker assembly has a housing 50 to which the shutdown device 40 and the trip device 20 are attached. The shutdown device 40 and the triggering device 20 are operatively connected via a tripping shaft 2. An actuation of the trip shaft 2 triggers the shutdown device 40, which interrupts the circuit to be switched. The shut-off device also has a mechanism that allows the contacts to be closed again after the circuit breaker has tripped and the cause for tripping has been removed.

Fig. 3 zeigt das Gehäuse 50, das aus zwei Gehäusehalbschalen zusammengefügt ist. Das Gehäuse 50 umschließt einen Hohlraum, in dem die elektrischen Elemente 30, 32, 34, 28 des Leistungsschalters aufgenommen sind. Das Gehäuse hat verschiedene Lagerpunkte für zu lagernde Elemente, die später erläutert werden. Allgemein bedeutet am Gehäuse gelagert in der nachfolgenden Beschreibung, dass entsprechende Lagerzapfen, -öffnungen etc. an dem Gehäuse ausgebildet sind. Das Gehäuse ist aus einem Isolierstoff, vorzugsweise aus einem Kunststoff, gemacht.Fig. 3 shows the housing 50, which is assembled from two housing halves. The housing 50 encloses a cavity in which the electrical elements 30, 32, 34, 28 of the circuit breaker are accommodated. The housing has various bearing points for elements to be stored, which will be explained later. Generally means mounted on the housing in the following description that corresponding bearing pins, openings etc. are formed on the housing. The housing is made of an insulating material, preferably made of a plastic.

Nun wird unter Bezugnahme auf Fig. 3 das Innere des Leistungsschalters im einzelnen erläutert. Wie aus Fig. 3 zu erkennen ist, hat der Leistungsschalter ein Gehäuse an welchem die Auslösevorrichtung angebracht ist (rechte Seite in Fig. 3). In dem Gehäuse ist eine an einem Rotor drehbar gehaltene Kontaktbrücke 32 angeordnet, die im Uhrzeigersinn und gegen den Uhrzeigersinn drehbar ist.Now, with reference to Fig. 3, the inside of the circuit breaker will be explained in detail. As can be seen from Fig. 3, the circuit breaker has a housing on which the triggering device is mounted (right side in Fig. 3). In the case is a arranged on a rotor rotatably held contact bridge 32 which is rotatable clockwise and counterclockwise.

Die Kontaktbrücke hat an ihren beiden Enden bewegbare Kontakte 30, die mit Festkontakten 34 zusammenwirken können. Wenn der Schalter geschlossen ist, ist die Kontaktbrücke entgegen der Darstellung in Fig. 3 um etwa 90° in Gegenuhrzeigersinn gedreht, so dass der bewegbare Kontakt 30 in Anlage mit dem Festkontakt 34 ist. Auf der dem Festkontakt 34 gemäß Fig. 3 diagonal gegenüberliegenden Seite, d.h. links unten in Fig. 3, ist ein Stromleiter (nicht gezeigt) vorgesehen, der ebenfalls einen Festkontakt aufweist, der mit dem anderen bewegbaren Kontakt der Kontaktbrücke 32 in Anlage ist, wenn die vorgenannten Kontakte 30, 34 geschlossen sind. Der von dem Leistungsschalter zu schaltende Strom fließt folglich durch die Kontaktbrücke 32.The contact bridge has movable contacts 30 at its two ends, which can interact with fixed contacts 34. When the switch is closed, the contact bridge, contrary to the illustration in FIG. 3, is rotated by approximately 90 ° in the counterclockwise direction, so that the movable contact 30 is in contact with the fixed contact 34. On the side fixed to the fixed contact 34 according to FIG. 3, ie. bottom left in Fig. 3, a current conductor (not shown) is provided which also has a fixed contact which is in abutment with the other movable contact of the contact bridge 32 when the aforementioned contacts 30, 34 are closed. The current to be switched by the power switch consequently flows through the contact bridge 32.

Ferner zeigt Fig. 3 rechts oben eine Auslösewelle 2, die mit einer nicht gezeigten Abschaltvorrichtung zusammenwirkt, die später erläutert wird. Zu erkennen ist, dass an der Auslösewelle 2 der Auslösevorrichtung ein Anschlag 16 ausgebildet ist, der im Bewegungsweg eines Hebels 6 der Auslösevorrichtung liegen kann. Die Funktion der Auslösevorrichtung wird später erläutert. In Fig. 3 ist weiterhin zu erkennen, dass jedem Kontaktpaar eine Lichtbogenlöschkammer 28 zugeordnet ist. Die Lichtbogenlöschkammer ist mit geeigneten Blechen (Dioneblechen) versehen, die im wesentlichen parallel zueinander in der Kammer angeordnet sind und mit 282 in Fig. 3 bezeichnet sind.Further, Fig. 3 shows a triggering shaft 2 at the top right, which cooperates with a shutdown, not shown, which will be explained later. It can be seen that on the trip shaft 2 of the triggering device, a stop 16 is formed, which may lie in the path of movement of a lever 6 of the triggering device. The function of the triggering device will be explained later. In Fig. 3 is further seen that each contact pair is associated with an arc quenching chamber 28. The arc quenching chamber is provided with suitable plates (Dioneblechen), which are substantially parallel are arranged to each other in the chamber and are denoted by 282 in Fig. 3.

Es ist hier anzumerken, dass der Rotor bzw. die Kontaktbrücke 32 über Federn in die jeweilige Endlage belastet sind, d.h. bei der Drehung überschreitet der Rotor einen Punkt größter Federverformung, so dass sich eine bistabile Konfiguration ergibt. Mit anderen Worten, die Kontaktbrücke 32 ist mittels Federkraft in der Schließstellung bzw. in der Öffnungsstellung gehalten. Dies ist für die Funktion des Leistungsschalters dahingehend von Bedeutung, dass beim Auftreten eines Überstroms eine Trennung der Kontakte voneinander erfolgen kann, wie später erläutert werden wird.It should be noted here that the rotor or the contact bridge 32 are loaded by springs in the respective end position, i. E. during rotation, the rotor exceeds a point of greatest spring deflection, resulting in a bistable configuration. In other words, the contact bridge 32 is held by spring force in the closed position or in the open position. This is important for the function of the circuit breaker in that, when an overcurrent occurs, a separation of the contacts can take place from one another, as will be explained later.

Der Abschaltvorgang wird nun im Vorgriff auf die Fig. 3 genauer erläutert. Die Abschaltvorrichtung (nicht gezeigt) bildet einen Klinkenmechanismus, ein Schaltschloss oder dergleichen, das die drehbare Kontaktbrücke 32 im Auslösefall im Uhrzeigersinn drehen kann. Der ausgelöste Zustand ist in Fig. 3 gezeigt.The switch-off process will now be explained in more detail in anticipation of FIG. The shut-off device (not shown) forms a latch mechanism, a switch lock or the like, which can rotate the rotatable contact bridge 32 in the case of release clockwise. The triggered condition is shown in FIG.

An dem Stromleiter 14 ist der Festkontakt 34 angebracht. Indem die Kontaktbrücke 32 im Gegenuhrzeigersinn in Fig. 3 gedreht wird, kann der an der Kontaktbrücke 32 angebrachte bewegbare Kontakt 30 in Anlage mit dem Festkontakt 34 des Stromleiters 14 gebracht werden. Gleichzeitig gelangt der bewegbare Kontakt 30 am anderen Ende der Kontaktbrücke 32 in Anlage mit dem Festkontakt (nicht gezeigt) eines abführenden Stromleiters (nicht gezeigt). Dadurch ist der Stromkreis durch die Leistungsschalterbaugruppe 1 geschlossen. In diesem geschlossenen Zustand des Schalters ist die Abschaltvorrichtung in Abschaltrichtung vorgespannt gehalten. Eine Drehung der Auslösewelle 2 der Auslösevorrichtung bewirkt eine Freigabe der Abschaltvorrichtung, die dann die Kontaktpaare 30, 34 trennt, d.h. den Leistungsschalter abschaltet.At the current conductor 14 of the fixed contact 34 is attached. By the contact bridge 32 is rotated in the counterclockwise direction in Fig. 3, attached to the contact bridge 32 movable contact 30 can be brought into contact with the fixed contact 34 of the conductor 14. At the same time, the movable contact 30 at the other end of the contact bridge 32 comes into contact with the fixed contact (not shown) of a laxative conductor (not shown). As a result, the circuit is closed by the circuit breaker assembly 1. In this closed state of the switch, the shutdown device is kept biased in the disconnection direction. A rotation of the trip shaft 2 of the trip device causes a release of the shutdown device, which then separates the pairs of contacts 30, 34, that switches off the power switch.

Nun wird unter Bezugnahme auf Fig. 1 bis 3 die Auslösevorrichtung näher erläutert. Die Auslösevorrichtung 20 hat neben der Auslösewelle 2 ein den Stromleiter 14 umgreifendes Joch 8, dessen Schenkel einem Anker oder Hebel 6 zugewandt sind. Der Hebel 6 ist um einen Drehpunkt 12 drehbar gelagert. Wie in Fig. 2 gut zu erkennen ist, ist der Hebel 6 über den Drehpunkt 12 hinaus verlängert und bildet eine Staufläche 10. Die Staufläche ist einem Ausblaskanal 26 zugeordnet, der später erläutert wird.The triggering device will now be explained in more detail with reference to FIGS. 1 to 3. The triggering device 20 has in addition to the trip shaft 2, a current conductor 14 encompassing yoke 8, the legs of which are facing an armature or lever 6. The lever 6 is rotatably mounted about a pivot point 12. As can be clearly seen in Fig. 2, the lever 6 is extended beyond the pivot point 12 and forms a storage area 10. The storage area is associated with a blow-out 26, which will be explained later.

Der Hebel 6 ist mit einer Zugfeder 24 in seine Ruhelage vorgespannt und ist mit seinem der Staufläche 10 abgewandten Ende einem Anschlag 16 der Auslösewelle 2 gegenüberliegend angeordnet. Ferner zeigt Fig. 2 ein Bimetallelement 18, das im wesentlichen parallel zu einem in Fig. 2 senkrechten Abschnitt des Stromleiters 14 angeordnet ist und mit einem Vorsprung 22 der Auslösewelle 2 in Eingriff gelangen kann.The lever 6 is biased by a tension spring 24 in its rest position and is arranged with its end of the storage area 10 facing away from a stop 16 of the trip shaft 2 opposite. Further, Fig. 2 shows a bimetallic element 18 which is arranged substantially parallel to a vertical in Fig. 2 portion of the current conductor 14 and can engage with a projection 22 of the trip shaft 2 in engagement.

Nun wird unter Bezugnahme auf Fig. 3, ausgehend vom geschlossenen Zustand der Kontakte 30, 34, der Auslösevorgang erläutert. Ein durch den Stromleiter 14 fließender Strom erzeugt ein Magnetfeld um den Stromleiter, das von dem Joch 8 gerichtet und verstärkt wird, so dass eine Magnetkraft in Richtung des Pfeils A auf den Hebel 6 ausgeübt wird. Übersteigt der Strom in dem Stromleiter 14 einen vorgegebenen Wert, wird der Hebel 6 gegen die Kraft der Feder 24 durch die Magnetkraft zwischen Joch und Hebel 6 so weit ausgelenkt, dass er gegen den Anschlag 16 der Auslösewelle 2 anschlägt. Dies bewirkt eine Drehung der Auslösewelle 2, die die Abschaltvorrichtung 40 (Fig. 1 und 2) auslöst und den Leistungsschalter wie zuvor beschrieben abschaltet.Referring now to Fig. 3, starting from the closed state of the contacts 30, 34, the trip operation will be explained. A current flowing through the current conductor 14 generates a magnetic field around the current conductor, which is directed and amplified by the yoke 8, so that a magnetic force in the direction of the arrow A is exerted on the lever 6. If the current in the current conductor 14 exceeds a predetermined value, the lever 6 is deflected against the force of the spring 24 by the magnetic force between the yoke and lever 6 so far that it abuts against the stop 16 of the trip shaft 2. This causes rotation of the trip shaft 2, which triggers the shutdown device 40 (Figures 1 and 2) and shuts off the power switch as previously described.

Tritt eine hohe Stromspitze auf, werden die Kontakte 30, 34 unmittelbar durch elektrodynamische Abstoßung auseinandergedrückt. Die elektrodynamische Abstoßung erfolgt durch die Magnetfelder um den Stromleiter 14 (unterer waagerechter Abschnitt) und die parallel zum Stromleiter 14 angeordnete Kontaktbrücke 32, wenn der Festkontakt 34 und der bewegbare Kontakt 30 an der Kontaktbrücke 32 geschlossen sind. Wenn ein hoher Strom durch den Leistungsschalter fließt, werden zwei parallele Leiter (Stromleiter 14 und Kontaktbrücke 32) in entgegengesetzter Richtung von Strom durchflossen. Um die Leiter entstehen gleichsinnige Magnetfelder, die sich abstoßen. Wird der Strom hoch, werden die Magnetfelder so stark, dass sie die Kontakte gegen die Schließkraft der Kontakte auseinander drücken. Die Schließkraft wird durch einen Federmechanismus aufgebracht. Die Kontaktbrücke 32 wird ein wenig im Uhrzeigersinn gedreht. Dabei wird zwischen den Kontakten 30, 34 ein Lichtbogen aufgespannt, der den zwischen den Kontakten gebildeten Spalt überbrückt. Jedem Kontaktpaar 30, 34 ist eine Lichtbogenlöschkammer 28 zugeordnet, um eine übermäßige Ausbreitung des Lichtbogens zu verhindern, bzw. um diesen rasch zu löschen.If a high current peak occurs, the contacts 30, 34 are pressed apart directly by electrodynamic repulsion. The electrodynamic repulsion is carried out by the magnetic fields around the current conductor 14 (lower horizontal section) and arranged parallel to the conductor 14 contact bridge 32 when the fixed contact 34 and the movable contact 30 are closed at the contact bridge 32. When a high current flows through the circuit breaker, current flows through two parallel conductors (current conductor 14 and contact bridge 32) in the opposite direction. Around the conductors arise magnetic fields in the same direction, which repel each other. When the current is high, the magnetic fields become so strong that they force the contacts apart against the closing force of the contacts. The closing force is applied by a spring mechanism. The contact bridge 32 is turned a little clockwise. In this case, an arc is spanned between the contacts 30, 34, which bridges the gap formed between the contacts. Each contact pair 30, 34 is associated with an arc quenching chamber 28 to prevent excessive propagation of the arc, or to delete this quickly.

Durch den energiereichen Lichtbogen wird der Druck der Luft oder des Gases in der Löschkammer 28 schlagartig (ca. 0,5 ms) erhöht. Der Druck in der Lichtbogenlöschkammer 28 kann durch den Ausblaskanal 26 an die Umgebung abgegeben werden. Dieser Druckabbau erfolgt durch einen Druckstoß (Pfeil P) oder eine Druckwelle, die den Ausblaskanal 26 sehr schnell durchläuft. Die Staufläche 10 des Hebels 6 ist in dem Ausblaskanal 26 angeordnet und wird mit dem Druckstoß beaufschlagt. Dabei wird die kinetische Energie der Druckwelle, d.h. des in dem Ausblaskanal 26 strömenden Mediums, in einen Staudruck auf der der Lichtbogenlöschkammer 28 zugewandten Seite der Staufläche 10 umgewandelt. Der Standartdruck ist höher als der auf der Rückseite der Staufläche 10 herrschende statische Druck. Einer durch diesen Druckunterschied erzeugten Kraft (Pfeil B) auf die Staufläche 10 folgend wird der Hebel 6 in Auslöserrichtung ausgelenkt.Due to the high-energy arc, the pressure of the air or the gas in the quenching chamber 28 is abruptly increased (about 0.5 ms). The pressure in the arc quenching chamber 28 can be released through the exhaust duct 26 to the environment. This pressure reduction takes place by a pressure surge (arrow P) or a pressure wave, which passes through the blow-out 26 very quickly. The storage area 10 of the lever 6 is arranged in the exhaust passage 26 and is acted upon by the pressure surge. The kinetic energy of the pressure wave, i. of the medium flowing in the blow-out channel 26 is converted into a dynamic pressure on the side of the storage surface 10 facing the arc-quenching chamber 28. The standard pressure is higher than the prevailing on the back of the storage area 10 static pressure. Following a force generated by this pressure difference (arrow B) on the storage surface 10, the lever 6 is deflected in the release direction.

Zur Funktionsweise ist hervorzuheben, dass es sich im vorliegenden Fall um einen strömungsdynamischen Vorgang handelt, der zur Auslenkung der Staufläche führt. Durch die lediglich dynamisch wirkende Prallströmung kann auf eine Abdichtung zwischen Staufläche und Ausblaskanalwand verzichtet werden, es genügt, wenn die Staufläche beweglich im wesentlichen quer zur Druckstoßrichtung angeordnet ist. Folglich ist der fertigungstechnische Aufwand vorteilhaft gering, da keine engen Toleranzen oder Passungen beachtet werden müssen.As far as the mode of operation is concerned, it should be emphasized that in the present case it is a fluid-dynamic process which leads to the deflection of the storage area. Due to the only dynamic acting Impingement flow can be dispensed with a seal between the storage surface and Ausblaskanalwand, it is sufficient if the storage surface is arranged to be movable substantially transverse to the pressure impact direction. Consequently, the manufacturing effort is advantageously low because no tight tolerances or fits must be observed.

Ferner kann die Staufläche auch außerhalb des Ausblaskanals in der Nähe der Austrittsöffnung angeordnet werden. Es genügt, wenn die Druckwelle mit ausreichender Geschwindigkeit auf die Staufläche trifft.Furthermore, the storage area can also be arranged outside the discharge channel in the vicinity of the outlet opening. It is sufficient if the pressure wave hits the storage area with sufficient speed.

Die beiden vorgenannten Auslösearten oder Auslösekräfte treten gleichzeitig auf, so dass die Auslösung durch die zwischen Hebel 6 und Joch 8 wirkende Magnetkraft zusätzlich durch die Auslösekraft infolge des Druckstoßes auf die Staufläche 10 des Hebels 6 unterstützt wird. Die entgegengesetzten Kräfte (Pfeile A und B) wirken auf zwei verschiedenen Seiten des Drehpunkts 12 auf den Hebel 6 und addieren sich zu einem Gesamtmoment um den Drehpunkt 12, das zur Auslenkung des Hebels zur Verfügung steht. Dadurch wird das zur Überwindung des mit der schnelleren Bewegung des Hebels ansteigenden Trägheitsmoments des Hebels zur Verfügung stehende Drehmoment erhöht.The two aforementioned triggering or tripping forces occur simultaneously, so that the triggering is additionally supported by the force acting between the lever 6 and yoke 8 magnetic force by the release force due to the pressure surge on the storage area 10 of the lever 6. The opposite forces (arrows A and B) act on two different sides of the pivot point 12 on the lever 6 and add up to a total moment about the pivot point 12, which is available for the deflection of the lever. This increases the torque available to overcome the moment of inertia of the lever that increases with the faster movement of the lever.

Insgesamt lässt sich mit dieser Anordnung folglich eine schnellere Auslösung erhalten, als nur durch die Magnetkraft. Dies ist insbesondere dann von Vorteil, wenn hohe Stromspitzen sehr schnell oder impulsartig auftreten, die besonders leicht Schäden am Leitungsschalter oder den nachfolgenden Einrichtungen hervorrufen können.Overall, with this arrangement, therefore, a faster triggering can be obtained, than only by the magnetic force. This is particularly advantageous when high current peaks occur very quickly or impulsively, which can easily cause damage to the line switch or the following devices.

Der in den Fig. 1 bis 3 gezeigte Leistungsschalter bzw. die Leistungsschalterbaugruppe hat ferner einen mit einem Bimetallelement 18 ausgerüsteten Überlastschutz. Das Bimetallelement 18 ist gemäß Fig. 2 parallel zu einem in Fig. 2 senkrechten Abschnitt des Stromleiters 14 angeordnet. Fließt ein Strom (Überlast) ständig durch den Stromleiter 14, der zu gering ist, um die magnetische oder die kombinierte Auslösung aus magnetischer Auslösung und Druckstoßauslösung zu initiieren, jedoch höher ist als der gewünschte Strom, wird der Stromleiter 14 allmählich erwärmt.The circuit breaker or circuit breaker assembly shown in FIGS. 1 to 3 further has an overload protection provided with a bimetallic element 18. The bimetallic element 18 is arranged parallel to a vertical in Fig. 2 section of the current conductor 14 as shown in FIG. If a current (overload) is constantly flowing through the current conductor 14, which is too low to initiate the magnetic or the combined triggering of magnetic release and pressure surge, but is higher than the desired current, the conductor 14 is gradually heated.

Der erwärmte Stromleiter 14 gibt einen Teil seiner Wärme an das dicht daneben angeordnete Bimetallelement 18 ab. Das auf diese Weise erhitzte Bimetallelement 18 verbiegt sich in Fig. 2 nach links und betätigt bzw. dreht die Auslösewelle 2 mit Hilfe des Vorsprungs 22 in der Auslöserichtung. Mit zunehmender Temperatur des Bimetallelements steigt auch seine Verbiegung oder Auslenkung aus der Ruhelage an. Überschreitet die Auslenkung des Bimetallelements bzw. die Drehung der Auslösewelle einen vorbestimmten Wert, löst die Auslösevorrichtung die Abschaltvorrichtung aus, die den Leistungsschalter abschaltet.The heated conductor 14 outputs a portion of its heat to the bimetallic element 18 arranged closely next to it. The bimetallic element 18 heated in this way bends to the left in FIG. 2 and actuates the triggering shaft 2 by means of the projection 22 in the triggering direction. As the temperature of the bimetallic element increases, its bending or deflection from the rest position also increases. If the deflection of the bimetallic element or the rotation of the tripping shaft exceeds a predetermined value, the tripping device triggers the disconnecting device, which switches off the power switch.

Eine modifizierte Form der Auslösevorrichtung ist in Fig. 4 gezeigt. Gleiche Bezugszeichen bezeichnen funktionsgleiche Teile oder Elemente wie in Fig. 1 bis 3. Die in Fig. 4 gezeigte Modifikation unterscheidet sich von der vorhergehenden Auslösevorrichtung nur durch eine andere Form der Beheizung des Bimetallelements 18.A modified form of the triggering device is shown in FIG. The same reference numerals designate functionally identical parts or elements as in FIGS. 1 to 3. The modification shown in FIG. 4 differs from the preceding triggering device only by another form of heating of the bimetal element 18.

Wie in Fig. 4 zu erkennen ist, ist der von außen kommende Stromleiter oder der Anschluss 38 über eine Leitung 36 mit dem Bimetallelement 18 verbunden. Das Bimetallelement 18 ist im Bereich seines in Fig. 4 unteren Endes elektrisch mit dem Stromleiter 14 verbunden. Der Stromleiter 14 durchläuft das Joch 8 und funktioniert auf die gleiche Weise wie sie zuvor anhand Fig. 1 bis 3 ausführlich geschildert wurde.As can be seen in FIG. 4, the external conductor or the terminal 38 is connected to the bimetallic element 18 via a line 36. The bimetallic element 18 is electrically connected to the current conductor 14 in the region of its lower end in FIG. 4. The current conductor 14 passes through the yoke 8 and operates in the same manner as previously described in detail with reference to FIGS. 1 to 3.

Im vorliegenden Fall ist das Bimetallelement 18 von dem zu überwachenden Strom durchflossen und wird direkt durch diesen Strom erhitzt. Wenn der Strom durch das Bimetallelement zu groß wird, übersteigt die Temperatur des Bimetallelements den Auslösewert und das Bimetallelement 18 verbiegt sich so weit, dass es die Auslösewelle 2 zum Auslösen der Abschaltvorrichtung 40 dreht.In the present case, the bimetal element 18 is traversed by the current to be monitored and is heated directly by this stream. When the current through the bimetallic element becomes too large, the temperature of the bimetal element exceeds the tripping value and the bimetallic element 18 bends to rotate the tripping shaft 2 to trip the tripping device 40.

Die übrige Anordnung, insbesondere die Staufläche 10 an dem Hebel 6, die in dem Ausblaskanal 26 angeordnet ist, sowie deren Zusammenwirken mit der magnetischen Auslösung ist entsprechend Fig. 1 bis 3 getroffen. Folglich liegt hier die gleiche Funktionsweise vor, so dass auf eine Wiederholung verzichtet werden kann.The rest of the arrangement, in particular the storage surface 10 on the lever 6, which is arranged in the exhaust duct 26, as well as their interaction with the magnetic release is taken as shown in FIG. 1 to 3. Consequently, the same mode of operation is present here, so that a repetition can be dispensed with.

Nachfolgend sind einzelne Funktionen und vorteilhafte Ausgestaltungen der Auslösevorrichtung erläutert.Below, individual functions and advantageous embodiments of the triggering device are explained.

In der Lichtbogenlöschkammer 28 sind Dionebleche 282 aus Stahl zum Löschen des Lichtbogens angeordnet. Die Bleche 282 sind parallel zueinander schräg in dem Gehäuse angeordnet und dienen damit einer besseren Führung der sich durch den Lichtbogen ausdehnenden Gase in Richtung auf den Ausblaskanal 26. Dadurch kann die Wirkung der Druckwelle oder des Druckstoßes verstärkt werden.In the arc quenching chamber 28, steel dion plates 282 are disposed to extinguish the arc. The plates 282 are arranged parallel to each other obliquely in the housing and thus serve to better guide the expanding by the arc gases in the direction of the exhaust passage 26. Thus, the effect of the pressure wave or the pressure surge can be amplified.

Der Mitnehmerabschnitt des Hebels 6 und der Anschlag 16 ermöglichen eine Betätigung der Auslösewelle 2 in der Auslöserichtung unabhängig von einer Bewegung des Hebels 6. Dadurch kann eine andere Auslösungsart, beispielsweise durch das Bimetallelement 18 ohne Rückwirkung auf die übrige Auslösevorrichtung erfolgen. Dies kann zweckmäßig sein, wenn der Auslösegrund durch geeignete Mittel (Schlepphebel und Sichtfenster oder dergleichen) bleibend angezeigt werden soll.The driver portion of the lever 6 and the stopper 16 allow actuation of the trip shaft 2 in the release direction regardless of a movement of the lever 6. Thereby, another type of triggering, for example by the bimetal 18 without affecting the rest of the triggering device. This can be expedient if the triggering reason by suitable means (drag lever and viewing window or the like) is to be displayed permanently.

Ferner ist die Staufläche durch einfaches Verlängern des Hebels 6 über den Drehpunkt 12 hinaus gebildet. Somit lässt sich die Auslösevorrichtung durch eine einfache konstruktive Maßnahme erreichen, ohne dass die Anzahl der Bauteile zunimmt. Gegebenenfalls kann die Staufläche als eine den Ausblaskanal verschließende Klappe gestaltet sein, die das Eindringen von Fremdmaterialien verhindert.Furthermore, the storage area is formed by simply extending the lever 6 beyond the fulcrum 12 addition. Thus, the triggering device can be achieved by a simple design measure, without increasing the number of components. Optionally, the storage area may be designed as a flap closing the blow-off channel, which prevents the ingress of foreign materials.

Ferner wurde zuvor lediglich eine Leistungsschalterbaugruppe beschrieben, die einpolig ist. Ein mehrpoliger Leistungsschalter lässt sich durch eine parallele Anordnung einer entsprechenden Anzahl von Leistungsschalterbaugruppen verwirklichen, wobei die Abschaltvorrichtung einem, mehreren oder allen Polen zugeordnet sein kann. Gleichermaßen kann die Auslösewelle für das Abschalten von nur einem Pol, von mehreren Polen oder von allen Polen.mit einer Auslöseeinrichtung eingerichtet sein.Furthermore, only one circuit breaker assembly has been previously described, which is unipolar. A multi-pole circuit breaker can be realized by a parallel arrangement of a corresponding number of circuit breaker assemblies, wherein the shutdown device can be associated with one, several or all poles. Similarly, the tripping shaft may be configured to switch off only one pole, multiple poles or all poles with a tripping device.

Claims (13)

  1. Circuit breaker (1) with
    contacts (30, 34) arranged in a housing (50) which can be disconnected by tripping a switch-off device (40),
    a blow-out channel (26) formed in the housing (50) which is associated with the contacts (30, 34), and with a tripping device (20) with a lever (6), mounted rotatably around a pivot point (12), which is actively connected with the switch-off device (40),
    a magnet system (8, 14) acting on the lever (6) which deflects the lever in order to trip the switch-off device (40), and
    a pressure plate (10) formed on the lever (6) which is associated with the blow-out channel (26) and which supports the deflecting movement of the lever (6) following a pressure impulse in the blow-out channel (26),
    characterised in that
    the pivot point (12) of the lever (6) is arranged between a first lever arm which can be acted on by the magnet system (8, 14) and a second lever arm which can be acted on by the pressure impulse, and which carries the pressure plate (10).
  2. Circuit breaker in accordance with claim 1, characterised in that the pressure plate (10) forms the second lever arm of the lever (6).
  3. Circuit breaker in accordance with claim 1 or 2, characterised in that the lever (6) is arranged opposite a yoke (8) of the magnet system which attracts the lever (6) when tripping occurs.
  4. Circuit breaker in accordance with claim 3, characterised in that the yoke (8) surrounds a current cable (14) which carries current to the contacts (30, 34) of the Circuit breaker (1).
  5. Circuit breaker in accordance with one of claims 1 to 4, characterised in that the lever (6) is actively connected with a tripping shaft (2) for actuating the switch-off device (40) via a cam mechanism which permits a tripping movement of the tripping shaft (2) independently of the movement of the lever (6).
  6. Circuit breaker in accordance with claim 5, characterised in that the cam mechanism has a stop (16) acted on in the tripping direction of the tripping shaft (2).
  7. Circuit breaker in accordance with claim 5 or 6, characterised in that the cam mechanism is arranged on one end of the first lever arm.
  8. Circuit breaker in accordance with one of claims 1 to 7, characterised in that the lever (6) is actively connected with a spring element (24) which pre-tensions the lever (6) in a resting position.
  9. Circuit breaker in accordance with claim 8, characterised in that the pressure plate (10) is arranged in the blow-out channel (26) and at least partially blocks the cross section of the channel cross section.
  10. Circuit breaker in accordance with claim 8, characterised in that the pressure plate (10) is arranged outside of the blow-out channel (26) and in the vicinity of its outlet opening.
  11. Circuit breaker in accordance with claim 4, characterised in that the current cable (14) is arranged in the immediate vicinity of a bimetallic strip (18), which is actively connected with the tripping shaft (2).
  12. Circuit breaker in accordance with claim 4, characterised in that the current cable (14) is formed by a bimetallic strip (18), which is actively connected with the tripping shaft (2).
  13. Circuit breaker in accordance with one of the preceding claims, characterised in that the blow-out channel (26) is connected with an electric arc extinguishing chamber (28)
EP01931535A 2000-03-17 2001-03-16 Combined tripping device for a circuit-breaker Expired - Lifetime EP1266389B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10013161 2000-03-17
DE10013161A DE10013161B4 (en) 2000-03-17 2000-03-17 Combined tripping device for a circuit breaker
PCT/EP2001/003036 WO2001069637A1 (en) 2000-03-17 2001-03-16 Combined tripping device for a circuit-breaker

Publications (2)

Publication Number Publication Date
EP1266389A1 EP1266389A1 (en) 2002-12-18
EP1266389B1 true EP1266389B1 (en) 2007-05-16

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US (1) US20010045879A1 (en)
EP (1) EP1266389B1 (en)
AT (1) ATE362646T1 (en)
DE (2) DE10013161B4 (en)
ES (1) ES2284645T3 (en)
PL (1) PL198622B1 (en)
WO (1) WO2001069637A1 (en)

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FR2844915B1 (en) * 2002-09-19 2005-05-06 Schneider Electric Ind Sa TRIGGER DEVICE FOR ELECTRICAL DEVICE SWITCH
US20090115556A1 (en) * 2007-11-05 2009-05-07 Square D Company Divided adjustable armature for a circuit breaker
DE102009015126A1 (en) 2009-03-31 2010-10-14 Siemens Aktiengesellschaft Trigger for an electrical switching arrangement
DE102009015222A1 (en) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Tripping device e.g. pressure detecting unit, for electrical switching arrangement e.g. individual electrical switchgear, has movable element forming channel section of flow channel, where channel section is guided outward by housing
DE102010040947A1 (en) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Triggering device for protective switching device, has V-shaped cross-sectional portion formed in base structure, so that separate bypass cable is defined at V-shaped bottom portion of base structure
DE102011075727A1 (en) 2011-05-12 2012-11-15 Siemens Aktiengesellschaft Device for triggering an electrical switch
EP2824689B1 (en) 2013-06-13 2016-04-06 ABB Schweiz AG Dynamic actuator and electric installation device with a dynamic trigger
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KR102349751B1 (en) * 2017-03-21 2022-01-11 엘에스일렉트릭(주) Circuit breaker with single pole switching unit
EP3439004A1 (en) * 2017-08-01 2019-02-06 Siemens Aktiengesellschaft Tripping element of a pressure release, pressure release with such a tripping element and electric switch
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ES2284645T3 (en) 2007-11-16
EP1266389A1 (en) 2002-12-18
US20010045879A1 (en) 2001-11-29
WO2001069637A1 (en) 2001-09-20
ATE362646T1 (en) 2007-06-15
DE10013161B4 (en) 2004-02-05
PL198622B1 (en) 2008-07-31
PL357600A1 (en) 2004-07-26
DE50112509D1 (en) 2007-06-28
DE10013161A1 (en) 2001-09-27

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