EP0148112B1 - Switch with a selective tripping device - Google Patents

Switch with a selective tripping device Download PDF

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Publication number
EP0148112B1
EP0148112B1 EP84730133A EP84730133A EP0148112B1 EP 0148112 B1 EP0148112 B1 EP 0148112B1 EP 84730133 A EP84730133 A EP 84730133A EP 84730133 A EP84730133 A EP 84730133A EP 0148112 B1 EP0148112 B1 EP 0148112B1
Authority
EP
European Patent Office
Prior art keywords
switch
striker
stop
lever
impact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84730133A
Other languages
German (de)
French (fr)
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EP0148112A1 (en
Inventor
Bernhard Preuss
Karl-Heinz Manthe
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0148112A1 publication Critical patent/EP0148112A1/en
Application granted granted Critical
Publication of EP0148112B1 publication Critical patent/EP0148112B1/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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to a switch with a selectively operating trigger with an impact arm, which is actuated by an electromagnet at a current corresponding to the triggering current of the switch and thereby acts on a switch lock of the switch, and with a pivotable lever arrangement which has a first and a second stop for the impact anchor and encompasses it in such a way that the lever arrangement can be pivoted out of a rest position into a position by the impact anchor via the first stop, in which the second stop enables the impact anchor to act on the switching mechanism.
  • an impact armature is displaceably arranged under the action of a spring in the interior of a coil of an electromagnet.
  • the known trigger further includes a lever arrangement which is pivotally mounted about an axis and consists of a two-armed, L-shaped lever and a further one-armed lever which is pivotably mounted on the L-shaped lever.
  • the two levers each form a stop for the impact anchor. In the rest position of the lever arrangement, the one-armed lever is outside the range of movement of the impact anchor.
  • the impact anchor strikes the first stop (L-shaped lever) of the lever arrangement and moves it into a position in which the second stop (armed lever) comes into the range of motion of the impact anchor. If a second trigger current pulse occurs before the lever arrangement swings back into its rest position, the impact armature is pulled back into the coil and thereby strikes against the one-armed lever. This folds down due to the action of the impact anchor and actuates a switch lock of the current-limiting switch via an additional lever.
  • the invention has for its object to provide a switch with a selectively operating trigger, which has the smallest possible number of moving parts and therefore works particularly reliably.
  • the lever arrangement according to the invention has a single lever, which is in the rest position with its second stop between the impact anchor and the release device and in the pivoted position, the second stop outside of Holds the range of motion of the impact anchor in a position in which the impact anchor can act directly on the switch lock.
  • An advantage of the switch according to the invention with the selectively operating trigger is that the lever arrangement has a single lever and is therefore of particularly simple construction. This is due to the fact that the lever arrangement blocks the movement of the impact anchor in its rest position before it can act on the release device and in its pivoted position removes this blocking. Because of the simple construction of the trigger, the switch according to the invention also works particularly reliably. A reliable triggering of the switch is also ensured by the fact that the impact anchor acts directly on the switching lock in the event of a triggering current. In addition, the switch according to the invention has the advantage because of its simple construction that it can be produced with comparatively little effort.
  • the lever is angled approximately U-shaped and has legs of different lengths, the longer leg being pivoted at one end about an axis and forming the first stop; the shorter leg of the lever represents the second stop.
  • the impact anchor can preferably be designed in the form of a rotating arm, the free end of which is arranged so as to cooperate with the stops of the lever arrangement.
  • the arm-shaped design of the impact anchor gives it elasticity, so that damage to the impact anchor and its bearing are avoided when the impact anchor hits the stops of the lever arrangement.
  • the electromagnet contains a busbar to which an iron yoke is attached.
  • This embodiment of the switch according to the invention is particularly suitable for switches for limiting high short-circuit currents which already generate a magnetic field which is sufficiently strong to actuate the impact armature in one current turn.
  • the busbar can be designed both in a straight line and in the form of a U-shaped curved current loop, so that a compact construction of the device according to the invention is advantageously achieved.
  • the iron yoke is horseshoe-shaped and is arranged on the busbar in such a way that the end faces of its two legs lie opposite the plane of motion of the impact anchor.
  • a particularly strong magnetic field is formed at currents in the order of magnitude of the tripping current on the end faces of the two legs of the iron yoke, so that in the sense of a safe actuation of the impact anchor has a great attraction.
  • the impact anchor is essentially cylindrical; the electromagnet contains a coil, in the interior of which the striking armature is displaceably mounted along the coil axis between the stops of the lever.
  • This embodiment is particularly suitable for use in systems in which short-circuit currents do not assume excessive values; due to the execution of the winding as a coil, a sufficiently strong magnetic field for actuating the impact armature is generated in the event of a short circuit from the triggering current. Due to the displaceable arrangement of the impact anchor in the interior of the coil, a particularly compact structure of the switch according to the invention can be achieved.
  • the switch shown in Figures 1 and 2 with a selectively operating trigger has an electromagnet with a loop-shaped busbar 2, which encloses a horseshoe-shaped iron yoke 3 such that its two legs 4 and 5 receive a leg 2 'of the busbar 2 between them.
  • the trigger of the switch further contains an impact armature 6, which is designed in the form of a rotating arm and is mounted in a housing part 7 of the switch so as to be pivotable about an axis of rotation 8.
  • the impact anchor 6 is oriented such that it can be pivoted towards or away from the end faces 9 and 10 of the two legs 4 and 5 of the iron yoke 3.
  • a slightly prestressed torsion spring 11 engages on the impact armature 6 and is supported on a pin 12 which penetrates the housing part 7 transversely.
  • the torsion spring 11 exerts a torque on the impact anchor 6, which acts in the direction of a rotational movement of the impact anchor 6 away from the iron yoke 3.
  • the striking anchor 6 has two striking surfaces 14 and 15 facing away from one another at its multiple angled free end 13. In the rest position, the striking anchor 6 leans with its striking surface 15 against a lever arrangement 16. This consists of a single, approximately U-shaped angled lever which, with regard to its U-shaped configuration, has two legs 17a and 17b of different lengths.
  • the longer leg 17a is pivotally mounted at one end 18 in the housing part 7 about an axis 19 in the plane of movement of the impact anchor 6 and forms a first stop 20a for the impact surface 15 of the impact anchor 6.
  • the shorter leg 17b of the lever arrangement 16 provides a second stop 20b for the striking surface 14 of the striking anchor 6.
  • a further torsion spring 21 which is somewhat more preloaded than the torsion spring 11, engages on the lever arrangement 16 and is supported on a bolt 22 which penetrates the housing part 7 transversely.
  • the further torsion spring 21 exerts a torque on the lever arrangement 16, which acts in the sense of a movement of the lever arrangement 16 with its second stop 20b against the impact anchor 6.
  • the lever arrangement 16 is pressed in its rest position with an extension 17c of the leg 17a against a stop device formed by the bolt 22. In this position, the lever arrangement 16 comprises the impact anchor 6 in such a way that its free end 13 with the impact surfaces 14 and 15 lies between the stops 20a and 20b of the lever arrangement 16.
  • the switch further includes a switch lock 23 with an actuator 24, which is arranged in the path of movement of the striker 6, the second stop 20b of the lever arrangement 16 being between the actuator 24 and the striking surface 14 ′ of the striker 6.
  • the switching lock 23 causes the opening of a contact system 25 of the switch, which is indicated in the drawing and which is arranged in the course of the busbar 2.
  • the magnetic field breaks down and thus its action of force on the impact armature 6. This vibrates due to the inertia of the torsion spring 11 due to its inertia back beyond its rest position.
  • the striking anchor 6 strikes with its striking surface 15 against the first stop 20a of the lever arrangement 16 and moves it against the spring force of the torsion spring 21 from its rest position into a further position, which is shown in broken lines in FIG.
  • the second stop 20b is in this position the lever arrangement 16 outside the range of movement of the impact anchor 6 with its impact surface 14.
  • the impact armature 6 is attracted again as a result of the next short-circuit current pulse by the magnetic field emanating from the iron yoke 3.
  • the torsion springs 11 and 21 are designed with regard to the minimum short-circuit current required to trigger the switch such that the magnetic field of the short-circuit current accelerates the striking armature 6 faster than the restoring force of the torsion spring 21, the lever arrangement 16. Therefore, the striking armature 6 moves relatively the lever arrangement 16 below it towards the iron yoke 3 and strikes with its striking surface 14 on the actuating element 24 of the switching mechanism 23.
  • the exemplary embodiment shown in FIG. 3 of a trigger of the switch according to the invention has an electromagnet 100 with a coil 101, which is applied to a coil body 102 and is surrounded by an iron yoke 103.
  • An essentially cylindrical impact armature 104 is held in the interior of the coil former 102 and consists of a central part 105 which has an extension 106 and 107 on each of its two end faces.
  • the extensions 106 and 107 each protrude from the iron yoke 103 through a bore 108 and 109, respectively.
  • the free ends of the extensions 106 and 107 each form a striking surface 110 or 111 of the striking anchor 104.
  • the striking anchor 104 is displaceably mounted along the coil axis by means of a first compression spring 112 and in the region of the extension 107 by means of a further compression spring 113 .
  • the trigger also has a lever arrangement 114. Like the lever arrangement of the exemplary embodiment according to FIGS. 1 and 2, this consists of a single approximately U-shaped angled lever with two legs 115 a and 115 b of different lengths, of which the longer leg 115 a has a first stop 116 a for the impact anchor 104 with its striking face 110 forms and the shorter leg 115b represents a second stop 116b for the impact anchor 104 with its face 111.
  • the longer leg 115a of the lever arrangement 114 is pivotally mounted at one end 117 about an axis 119 held on a housing part 118 in the plane of movement of the impact anchor 104.
  • a torsion spring 120 acting on the lever 114 presses it in its rest position against a stop device formed by a bolt 121 penetrating the housing part 118. In this rest position, shown with solid lines, the lever arrangement 114 engages around the impact anchor 104 in such a way that its impact surfaces 110 and 111 lie between the stops 116a and 116b of the lever arrangement 114.
  • a switch lock 122 with an actuating element 123 is further arranged, with the second stop 116b between the actuating element 123 of the key switch 122 and the striking surface 111 of the impact armature 104 in the rest position of the lever arrangement 114.
  • the impact armature 104 In the event of a first short-circuit current pulse, the impact armature 104 is drawn into the interior of the coil 101 in the direction of the switching mechanism 122. However, before the striking anchor 104 reaches the actuating member 123 of the key switch 122, it strikes with its striking surface 111 against the second stop 116b of the lever arrangement 114, so that its movement is blocked. After the end of the first short-circuit current pulse, the impact armature 104 swings back in the direction of its rest position accelerated by the second compression spring 113.
  • the striking anchor 104 moves beyond its rest position, with its striking surface 110 striking the first stop 116a of the lever 114 and pivoting it against the spring force of the torsion spring 120 into the position shown in broken lines.
  • the second stop 116b of the lever 114 is outside the range of motion of the impact armature 104. If there is no further short-circuit current pulse, the impact armature 104 and the lever arrangement 114 move into their rest positions, driven by the first compression spring 112 and the torsion spring 120, respectively back.
  • the impact armature 104 is pulled back into the interior of the coil 103.
  • the impact armature 104 is accelerated faster by the magnetic field of the coil 103 than the lever arrangement 114 by the restoring force of the Torsion spring 120.
  • the striking armature 104 moves with its striking surface 111 past the second stop 116b of the lever 114 against the actuating element 123 of the switch lock 122, which causes the contact system (not shown) to open under the force of the striking armature 104.

Description

Die Erfindung betrifft einen Schalter mit einem selektiv arbeitenden Auslöser mit einem Schlaganker, der bei einem dem Auslösestrom des Schalters entsprechenden Strom durch einen Elektromagneten betätigt wird und dabei auf ein Schaltschloß des Schalters einwirkt, sowie mit einer schwenkbaren Hebelanordnung, die einen ersten und einen zweiten Anschlag für den Schlaganker aufweist und diesen derart umgreift, daß von dem Schlaganker über den ersten Anschlag die Hebelanordnung aus einer Ruhestellung heraus in eine Lage schwenkbar ist, in der der zweite Anschlag eine Einwirkung des Schlagankers auf das Schaltschloß ermöglicht.The invention relates to a switch with a selectively operating trigger with an impact arm, which is actuated by an electromagnet at a current corresponding to the triggering current of the switch and thereby acts on a switch lock of the switch, and with a pivotable lever arrangement which has a first and a second stop for the impact anchor and encompasses it in such a way that the lever arrangement can be pivoted out of a rest position into a position by the impact anchor via the first stop, in which the second stop enables the impact anchor to act on the switching mechanism.

Bei einem derartigen, aus der DE-C- 28 54 568 bekannten Schalter mit einem selektiv arbeitenden Auslöser ist ein Schlaganker unter Einwirkung einer Feder im Innenraum einer Spule eines Elektromagneten verschiebbar angeordnet. Der bekannte Auslöser enthält weiterhin eine Hebelanordnung, die um eine Achse schwenkbar gelagert ist und aus einem zweiarmigen, L-förmigen Hebel und aus einem weiteren einarmigen Hebel besteht, der an dem L-förmigen Hebel schwenkbar gelagert ist. Die beiden Hebel bilden jeweils einen Anschlag für den Schlaganker. In der Ruhestellung der Hebelanordnung befindet sich der einarmige Hebel außerhalb des Bewegungsbereiches des Schlagankers. Bei einem ersten Auslösestromimpuls wird der Schlaganker in die Spule des Elektromagneten hineingezogen und schwingt nach Beendigung des Stromimpulses zurück. Dabei schlägt der Schlaganker gegen den ersten Anschlag (L-förmiger Hebel) der Hebelanordnung und bewegt diese in eine Lage, in der der zweite Anschlag (einarmier Hebel) in den Bewegungsbereich des Schlagankers gerät. Wenn ein zweiter Auslösestromimpuls auftritt, bevor die Hebelanordnung in ihre Ruhestellung zurückgeschwungen ist, wird der Schlaganker wieder in die Spule hineingezogen und schlägt dabei gegen den einarmigen Hebel. Dieser klappt infolge der Einwirkung des Schlagankers um und betätigt dabei über einen zusätzlichen Hebel ein Schaltschloß des strombegrenzenden Schalters.In such a switch known from DE-C-28 54 568 with a selectively operating trigger, an impact armature is displaceably arranged under the action of a spring in the interior of a coil of an electromagnet. The known trigger further includes a lever arrangement which is pivotally mounted about an axis and consists of a two-armed, L-shaped lever and a further one-armed lever which is pivotably mounted on the L-shaped lever. The two levers each form a stop for the impact anchor. In the rest position of the lever arrangement, the one-armed lever is outside the range of movement of the impact anchor. With a first trigger current pulse, the impact armature is drawn into the coil of the electromagnet and swings back after the end of the current pulse. The impact anchor strikes the first stop (L-shaped lever) of the lever arrangement and moves it into a position in which the second stop (armed lever) comes into the range of motion of the impact anchor. If a second trigger current pulse occurs before the lever arrangement swings back into its rest position, the impact armature is pulled back into the coil and thereby strikes against the one-armed lever. This folds down due to the action of the impact anchor and actuates a switch lock of the current-limiting switch via an additional lever.

Der Erfindung liegt die Aufgabe zugrunde, einen Schalter mit einem selektiv arbeitenden Auslöser anzugeben, der eine möglichst geringe Anzahl von beweglichen Teilen aufweist und daher besonders zuverlässig arbeitet.The invention has for its object to provide a switch with a selectively operating trigger, which has the smallest possible number of moving parts and therefore works particularly reliably.

Die Lösung dieser Aufgabe besteht darin, daß bei dem eingangs genannten Schalter mit selektiv arbeitendem Auslöser erfindungsgemäß die Hebelanordnung einen einzigen Hebel aufweist, der in der Ruhestellung mit seinem zweiten Anschlag zwischen dem Schlaganker und der Auslöseeinrichtung liegt und in der geschwenkten Lage den zweiten Anschlag außerhalb des Bewegungsbereiches des Schlagankers in einer Stellung hält, in der der Schlaganker unmittelbar auf das Schaltschloß einwirken kann.The solution to this problem is that in the aforementioned switch with selectively operating trigger, the lever arrangement according to the invention has a single lever, which is in the rest position with its second stop between the impact anchor and the release device and in the pivoted position, the second stop outside of Holds the range of motion of the impact anchor in a position in which the impact anchor can act directly on the switch lock.

Ein Vorteil des erfindungsgemäßen Schalters mit dem selektiv arbeitenden Auslöser besteht darin, daß die Hebelanordnung einen einzigen Hebel aufweist und daher besonders einfach aufgebaut ist. Dies ist darauf zurückzuführen, daß die Hebelanordnung in ihrer Ruhestellung die Bewegung des Schlagankers blockiert, bevor dieser auf die Auslöseeinrichtung einwirken kann und in ihrer geschwenkten Lage diese Blockierung aufhebt. Aufgrund des einfachen Aufbaus des Auslösers arbeitet der erfindungsgemäße Schalter auch besonders zuverlässig. Eine sichere Auslösung des Schalters ist zudem dadurch gewährleistet, daß der Schlaganker bei einem Auslösestrom unmittelbar auf das Schaltschloß einwirkt. Außerdem bietet der erfindungsgemäße Schalter wegen seines einfachen Aufbaus den Vorteil, daß er mit vergleichsweise geringem Aufwand herstellbar ist.An advantage of the switch according to the invention with the selectively operating trigger is that the lever arrangement has a single lever and is therefore of particularly simple construction. This is due to the fact that the lever arrangement blocks the movement of the impact anchor in its rest position before it can act on the release device and in its pivoted position removes this blocking. Because of the simple construction of the trigger, the switch according to the invention also works particularly reliably. A reliable triggering of the switch is also ensured by the fact that the impact anchor acts directly on the switching lock in the event of a triggering current. In addition, the switch according to the invention has the advantage because of its simple construction that it can be produced with comparatively little effort.

Bei einer aus fertigungstechnischen Gründen vorteilhaften Ausgestaltung des erfindungsgemäßen Schalters ist der Hebel etwa U-förmig abgewinkelt und weist unterschiedlich lange Schenkel auf, wobei der längere Schenkel an einem Ende um eine Achse schwenkbar gelagert ist und den ersten Anschlag bildet; der kürzere Schenkel des Hebels stellt den zweiten Anschlag dar.In an embodiment of the switch according to the invention which is advantageous for manufacturing reasons, the lever is angled approximately U-shaped and has legs of different lengths, the longer leg being pivoted at one end about an axis and forming the first stop; the shorter leg of the lever represents the second stop.

Der Schlaganker kann vorzugsweise in Form eines Dreharmes ausgebildet sein, dessen freies Ende mit den Anschlägen der Hebelanordnung zusammenwirkbar angeordnet ist. Durch die armförmige Ausbildung des Schlagankers erhält dieser eine Elastizität, so daß beim Auftreffen des Schlagankers auf die Anschläge der Hebelanordnung Beschädigungen an dem Schlaganker und dessen Lagerung vermieden werden.The impact anchor can preferably be designed in the form of a rotating arm, the free end of which is arranged so as to cooperate with the stops of the lever arrangement. The arm-shaped design of the impact anchor gives it elasticity, so that damage to the impact anchor and its bearing are avoided when the impact anchor hits the stops of the lever arrangement.

Bei Ausgestaltung des Schlagankers in Form eines schwenkbaren Dreharmes ist es von besonderem Vorteil, wenn der Elektromagent eine Stromschiene enthält, an der ein Eisenjoch befestigt ist. Diese Ausführungsform des erfindungsgemäßen Schalters ist besonders für Schalter zum Begrenzen hoher Kurzschlußströme geeignet, die bereits in einer Stromwindung ein zur Betätigung des Schlägankers ausreichend starkes Magnetfeld erzeugen. Die Stromschiene kann sowohl geradlinig als auch in Form einer U-förmig gebogenen Stromschleife ausgeführt sein, so daß in vorteilhafter Weise ein kompakter Aufbau der erfindungsgemäßen Vorrichtung erreicht wird.When designing the impact anchor in the form of a pivotable rotating arm, it is particularly advantageous if the electromagnet contains a busbar to which an iron yoke is attached. This embodiment of the switch according to the invention is particularly suitable for switches for limiting high short-circuit currents which already generate a magnetic field which is sufficiently strong to actuate the impact armature in one current turn. The busbar can be designed both in a straight line and in the form of a U-shaped curved current loop, so that a compact construction of the device according to the invention is advantageously achieved.

Dabei ist es von besonderem Vorteil, wenn das Eisenjoch hufeisenförmig ausgebildet ist und derart an der Stromschiene angeordnet ist, daß die Stirnseiten seiner beiden Schenkel quer zur Bewegungsebene des Schlagankers diesem gegenüber liegen. Infolge der hufeisenförmigen Ausführung des Eisenjoches bildet sich nämlich bei Strömen in der Größenordnung des Auslösestromes an den Stirnflächen der beiden Schenkel des Eisenjoches ein besonders kräftiges Magnetfeld aus, so daß im Sinne einer sicheren Betätigung des Schlagankers auf diesen eine große Anziehungskraft wirkt.It is particularly advantageous if the iron yoke is horseshoe-shaped and is arranged on the busbar in such a way that the end faces of its two legs lie opposite the plane of motion of the impact anchor. As a result of the horseshoe-shaped design of the iron yoke, a particularly strong magnetic field is formed at currents in the order of magnitude of the tripping current on the end faces of the two legs of the iron yoke, so that in the sense of a safe actuation of the impact anchor has a great attraction.

Bei einer weiteren vorteilhaften Ausführungsform des erfindungsgemäßen Schalters ist der Schlaganker im wesentlichen zylinderförmig ausgebildet; der Elektromagnet enthält eine Spule, in deren Inneren der Schlaganker entlang der Spulenachse zwischen den Anschlägen des Hebels verschiebbar gelagert ist. Diese Ausführungsform ist besonders für die Verwendung in Anlagen geeignet, in denen Kurzschlußströme keine allzu großen Werte annehmen; infolge der Ausführung der Wicklung als Spule wird im Kurzschlußfall von dem Auslösestrom ein ausreichend starkes Magnetfeld zur Betätigung des Schlagankers erzeugt. Durch die verschiebbare Anordnung des Schlagankers im Inneren der Spule läßt sich ein besonders kompakter Aufbau des erfindungsgemäßen Schalters erreichen.In a further advantageous embodiment of the switch according to the invention, the impact anchor is essentially cylindrical; the electromagnet contains a coil, in the interior of which the striking armature is displaceably mounted along the coil axis between the stops of the lever. This embodiment is particularly suitable for use in systems in which short-circuit currents do not assume excessive values; due to the execution of the winding as a coil, a sufficiently strong magnetic field for actuating the impact armature is generated in the event of a short circuit from the triggering current. Due to the displaceable arrangement of the impact anchor in the interior of the coil, a particularly compact structure of the switch according to the invention can be achieved.

Zur Erläuterung der Erfindung ist in

  • Figur 1 ein erstes Ausführungsbeispiel des erfindungsgemäßen Schalters und in
  • Figur 2 ein Schnitt durch die Ausführungsform nach Figur entlang der Linie AB dargestellt.
  • Figur 3 zeigt ein weiteres Ausführungsbeispiel eines Auslösers des erfindungsgemäßen Schalters mit einem im wesentlichen zylinderförmigen Schlaganker.
To explain the invention is in
  • Figure 1 shows a first embodiment of the switch according to the invention and in
  • Figure 2 shows a section through the embodiment of Figure along the line AB.
  • Figure 3 shows a further embodiment of a trigger of the switch according to the invention with an essentially cylindrical impact anchor.

Der in den Figuren 1 und 2 dargestellte Schalter mit einem selektiv arbeitenden Auslöser weist einen Elektromagneten mit einer schleifenförmigen Stromschiene 2 auf, die ein hufeisenförmiges Eisenjoch 3 derart umschließt, daß dessen beide Schenkel 4 und 5 einen Schenkel 2' der Stromschiene 2 zwischen sich aufnehmen. Der Auslöser des Schalters enthält weiterhin einen Schlaganker 6, der in Form eines Dreharmes ausgebildet ist und in einem Gehäuseteil 7 des Schalters um eine Drehachse 8 schwenkbar gelagert ist. Dabei ist der Schlaganker 6 derart ausgerichtet, daß er in Richtung auf die Stirnflächen 9 und 10 der beiden Schenkel 4 und 5 des Eisenjoches 3 zu oder von diesen weg schwenkbar ist. Im Bereich der Drehachse 8 greift an dem Schlaganker 6 eine leicht vorgespannte Drehfeder 11 an, die sich an einem das Gehäuseteil 7 quer durchdringenden Stift 12 abstützt. Dabei übt die Drehfeder 11 auf den Schlaganker 6 ein Drehmoment aus, welches in Richtung einer Drehbewegung des Schlagankers 6 von dem Eisenjoch 3 weg wirkt. Der Schlaganker 6 weist an seinem mehrfach abgewinkelten freien Ende 13 zwei einander abgewandte Schlagflächen 14 und 15 auf. In Ruhestellung lehnt sich der Schlaganker 6 mit seiner Schlagfläche 15 gegen eine Hebelanordnung 16. Diese besteht aus einem einzigen, etwa U-förmig abgewinkelten Hebel, der hinsichtlich seiner U-förmigen Ausgestaltung zwei unterschiedlich lange Schenkel 17a und 17b aufweist. Der längere Schenkel 17a ist an einem Ende 18 in dem Gehäuseteil 7 um eine Achse 19 in der Bewegungsebene des Schlagankers 6 schwenkbar gelagert und bildet einen ersten Anschlag 20a für die Schlagfläche 15 des Schlagankers 6. Der kürzere Schenkel 17b der Hebelanordnung 16 stellt einen zweiten Anschlag 20b für die Schlagfläche 14 des Schlagankers 6 dar. Im Bereich der Achse 19 greift an der Hebelanordnung 16 eine gegenüber der Drehfeder 11 etwas stärker vorgespannte weitere Drehfeder 21 an, die sich an einem das Gehäuseteil 7 quer durchsetzenden Bolzen 22 abstützt. Die weitere Drehfeder 21 übt auf die Hebelanordnung 16 ein Drehmoment aus, das im Sinne einer Bewegung der Hebelanordnung 16 mit ihrem zweiten Anschlag 20b gegen den Schlaganker 6 wirkt. Dabei wird die Hebelanordnung 16 in ihrer Ruhestellung mit einem Fortsatz 17c des Schenkels 17a gegen eine von dem Bolzen 22 gebildete Anschlagvorrichtung gedrückt. In dieser Stellung umfaßt die Hebelanordnung 16 den Schlaganker 6 derart, daß dessen freies Ende 13 mit den Schlagflächen 14 und 15 zwischen den Anschlägen 20a und 20b der Hebelanordnung 16 liegt.The switch shown in Figures 1 and 2 with a selectively operating trigger has an electromagnet with a loop-shaped busbar 2, which encloses a horseshoe-shaped iron yoke 3 such that its two legs 4 and 5 receive a leg 2 'of the busbar 2 between them. The trigger of the switch further contains an impact armature 6, which is designed in the form of a rotating arm and is mounted in a housing part 7 of the switch so as to be pivotable about an axis of rotation 8. The impact anchor 6 is oriented such that it can be pivoted towards or away from the end faces 9 and 10 of the two legs 4 and 5 of the iron yoke 3. In the area of the axis of rotation 8, a slightly prestressed torsion spring 11 engages on the impact armature 6 and is supported on a pin 12 which penetrates the housing part 7 transversely. The torsion spring 11 exerts a torque on the impact anchor 6, which acts in the direction of a rotational movement of the impact anchor 6 away from the iron yoke 3. The striking anchor 6 has two striking surfaces 14 and 15 facing away from one another at its multiple angled free end 13. In the rest position, the striking anchor 6 leans with its striking surface 15 against a lever arrangement 16. This consists of a single, approximately U-shaped angled lever which, with regard to its U-shaped configuration, has two legs 17a and 17b of different lengths. The longer leg 17a is pivotally mounted at one end 18 in the housing part 7 about an axis 19 in the plane of movement of the impact anchor 6 and forms a first stop 20a for the impact surface 15 of the impact anchor 6. The shorter leg 17b of the lever arrangement 16 provides a second stop 20b for the striking surface 14 of the striking anchor 6. In the region of the axis 19, a further torsion spring 21, which is somewhat more preloaded than the torsion spring 11, engages on the lever arrangement 16 and is supported on a bolt 22 which penetrates the housing part 7 transversely. The further torsion spring 21 exerts a torque on the lever arrangement 16, which acts in the sense of a movement of the lever arrangement 16 with its second stop 20b against the impact anchor 6. The lever arrangement 16 is pressed in its rest position with an extension 17c of the leg 17a against a stop device formed by the bolt 22. In this position, the lever arrangement 16 comprises the impact anchor 6 in such a way that its free end 13 with the impact surfaces 14 and 15 lies between the stops 20a and 20b of the lever arrangement 16.

Der Schalter enthält weiterhin ein Schaltschloß 23 mit einem Betätigungsglied 24, das in der Bewegungsbahn des Schlagankers 6 angeordnet ist, wobei der zweite Anschlag 20b der Hebelanordnung 16 zwischen dem Betätigungsglied 24 und der Schlagfläche 14'des Schlagankers 6 liegt. Bei Krafteinwirkung auf das Betätigungsglied 24 veranlaßt das Schaltschloß 23 die Öffnung eines andeutungsweise dargestellten Kontaktsystems 25 des Schalters, das im Zuge der Stromschiene 2 angeordnet ist.The switch further includes a switch lock 23 with an actuator 24, which is arranged in the path of movement of the striker 6, the second stop 20b of the lever arrangement 16 being between the actuator 24 and the striking surface 14 ′ of the striker 6. When force is exerted on the actuating element 24, the switching lock 23 causes the opening of a contact system 25 of the switch, which is indicated in the drawing and which is arranged in the course of the busbar 2.

Beim Auftreten eines Kurzschlußstromimpulses bzw. der ersten Halbschwingung eines Kurzschlußwechselstromes in der Größe des Auslösestromes wird in der schleifenförmigen Stromschiene 2 ein Magnetfeld erzeugt, das in dem Eisenjoch 3 konzentriert wird. Dabei wird der Schlaganker 6 durch die Kraft des Magnetfeldes gegen die Vorspannung der Drehfeder 11 in Richtung auf das Eisenjoch 3 und das Schaltschloß 23 zu bewegt. Bevor der Schlaganker 6 dieses erreicht, trifft er mit seiner Schlagfläche 14 gegen den zweiten Anschlag 20b der Hebelanordnung 16. Da die Hebelanordnung 16 selbst durch den Bolzen 22 an einer Bewegung in Richtung auf das Eisenjoch 3 zu gehindert ist, blockiert sie eine Weiterbewegung des Schlagankers 6. Nach dem Ende des ersten Kurzschlußstromimpulses bzw. nach der ersten Halbschwingung des Kurzschlußwechselstromes bricht das Magnetfeld und damit seine Krafteinwirkung auf den Schlaganker 6 zusammen. Dieser schwingt durch die Federkraft der Drehfeder 11 beschleunigt infolge seiner Massenträgheit über seine Ruhestellung hinaus zurück. Dabei schlägt der Schlaganker 6 mit seiner Schlagfläche 15 gegen den ersten Anschlag 20a der Hebelanordnung 16 und bewegt diese gegen die Federkraft der Drehfeder 21 aus ihrer Ruhelage in eine weitere Stellung, die in Figur 1 strichliert dargestellt ist. In dieser Stellung befindet sich der zweite Anschlag 20b der Hebelanordnung 16 außerhalb des Bewegungsbereiches des Schlagankers 6 mit seiner Schlagfläche 14.When a short-circuit current pulse or the first half-oscillation of a short-circuit alternating current in the size of the tripping current occurs, a magnetic field is generated in the loop-shaped current rail 2 and is concentrated in the iron yoke 3. The impact armature 6 is moved by the force of the magnetic field against the bias of the torsion spring 11 in the direction of the iron yoke 3 and the switching mechanism 23. Before the striking anchor 6 reaches it, its striking surface 14 strikes the second stop 20b of the lever arrangement 16. Since the lever arrangement 16 itself is prevented from moving in the direction of the iron yoke 3 by the bolt 22, it blocks further movement of the striking anchor 6. After the end of the first short-circuit current pulse or after the first half-oscillation of the short-circuit alternating current, the magnetic field breaks down and thus its action of force on the impact armature 6. This vibrates due to the inertia of the torsion spring 11 due to its inertia back beyond its rest position. The striking anchor 6 strikes with its striking surface 15 against the first stop 20a of the lever arrangement 16 and moves it against the spring force of the torsion spring 21 from its rest position into a further position, which is shown in broken lines in FIG. The second stop 20b is in this position the lever arrangement 16 outside the range of movement of the impact anchor 6 with its impact surface 14.

Tritt nun kein weiterer Kurzschlußstromimpuls oder keine zweite Halbschwingung des Kurzschlußwechselstromes auf, weil ein dem Schalter untergeordneter weiterer Schalter durch die erste Halbschwingung ausgelöst und dadurch den Stromfluß unterbrochen hat, so schwingen der Schlaganker 6 und die Hebelanordnung 16 durch die Drehfeder 21 getrieben in ihre jeweiligen (ausgezogen gezeichneten) Ruhestellungen zurück, und eine Betätigung des Schaltschlosses 23 findet nicht statt.If there is no further short-circuit current pulse or no second half-oscillation of the short-circuit alternating current because a further switch subordinate to the switch has been triggered by the first half-oscillation and has thereby interrupted the current flow, the striking armature 6 and the lever arrangement 16 oscillate into their respective (driven by the torsion spring 21 drawn undrawn) rest positions, and actuation of the switch 23 does not take place.

Fließt dagegen weiterhin ein Kurzschlußstrom, so wird der Schlaganker 6 infolge des nächsten Kurzschlußstromimpulses erneut durch das von dem Eisenjoch 3 ausgehende Magnetfeld angezogen. Die Drehfedern 11 und 21 sind dabei im Hinblick auf den zur Auslösung des Schalters erforderlichen minimalen Kurzschlußstrom derart ausgelegt, daß das Magnetfeld des Kurzschlußstromes den Schlaganker 6 schneller beschleunigt, als die Rückstellkraft der Drehfeder 21 die Hebelanordnung 16. Daher bewegt sich der Schlaganker 6 relätiv zu der Hebelanordnung 16 unter dieser hinweg auf das Eisenjoch 3 zu und trifft mit seiner Schlagfläche 14 auf das Betätigungsglied 24 des Schaltschlosses 23. Dieses bewirkt daraufhin eine Öffnung des andeutungsweise dargestellten Kontaktsystems 25. Um eine Beschädigung des Schaltschlosses 23 durch den Schlaganker 6 zu vermeiden, bilden die Stirnflächen 9 und 10 der Schenkel 4 und 5 des Eisenjoches 3 eine Auftreffvorrichtung für den Schlaganker 6. Nach dem Öffnen des Kontaktsystems 25 bricht das Magnetfeld wieder zusammen, so daß sich der Schlaganker 6 unter Einwirkung der Drehfeder 11 wieder in seine Ruhestellung zurückbewegt, bevor die Hebelanordnung 16 ihrerseits ihre Ruhestellung einnimmt. An Stelle der Drehfedern 11 und 21 können auch andere Federn wie z. B. Zug- oder Druckfedern Verwendung finden.If, on the other hand, a short-circuit current continues to flow, the impact armature 6 is attracted again as a result of the next short-circuit current pulse by the magnetic field emanating from the iron yoke 3. The torsion springs 11 and 21 are designed with regard to the minimum short-circuit current required to trigger the switch such that the magnetic field of the short-circuit current accelerates the striking armature 6 faster than the restoring force of the torsion spring 21, the lever arrangement 16. Therefore, the striking armature 6 moves relatively the lever arrangement 16 below it towards the iron yoke 3 and strikes with its striking surface 14 on the actuating element 24 of the switching mechanism 23. This then causes the contact system 25, which is indicated as indicated, to open, in order to prevent damage to the switching mechanism 23 by the striking armature 6 the end faces 9 and 10 of the legs 4 and 5 of the iron yoke 3 a striking device for the impact anchor 6. After opening the contact system 25, the magnetic field collapses again, so that the impact anchor 6 moves back into its rest position under the action of the torsion spring 11 before the lever assembly 16 their on the other side Instead of the torsion springs 11 and 21, other springs such as. B. tension or compression springs are used.

Das in Figur 3 dargestellte Ausführungsbeispiel eines Auslösers des erfindungsgemäßen Schalters weist einen Elektromagneten 100 mit einer Spule 101 auf, die auf einem Spulenkörper 102 aufgebracht ist und von einem Eisenjoch 103 umgeben ist. Im Inneren des Spulenkörpers 102 ist ein im wesentlichen zylinderförmiger Schlaganker 104 gehalten, der aus einem Mittelteil 105 besteht, das an seinen beiden Stirnseiten jeweils einen Fortsatz 106 und 107 aufweist. Die Fortsätze 106 und 107 ragen durch jeweils eine Bohrung 108 bzw. 109 in dem Eisenjoch 103 aus diesem heraus. Die freien Enden der Fortsätze 106 und 107 bilden jeweils eine Schlagfläche 110 bzw. 111 des Schlagankers 104. Im Bereich seines Fortsatzes 106 ist der Schlaganker 104 mittels einer ersten Druckfeder 112 und im Bereich des Fortsatzes 107 mittels einer weiteren Druckfeder 113 entlang der Spulenachse verschiebbar gelagert. Der Auslöser weist weiterhin eine Hebelanordnung 114 auf. Diese besteht ebenso wie die Hebelanordnung des Ausführungsbeispieles nach den Figuren 1 und 2 aus einem einzigen etwa U-förmig abgewinkelten Hebel mit zwei unterschiedlich langen Schenkeln 115a und 115b, von denen der längere Schenkel 115a einen ersten Anschlag 116a für den Schlaganker 104 mit seiner Schlagfläche 110 bildet und der kürzere Schenkel 115b einen zweiten Anschlag 116b für den Schlaganker 104 mit seiner Schlagfläche 111 darstellt. Der längere Schenkel 115a der Hebelanordnung 114 ist an einem Ende 117 um eine an einem Gehäuseteil 118 gehaltene Achse 119 in der Bewegungsebene des Schlagankers 104 schwenkbar gelagert. Eine an dem Hebel 114 angreifende Drehfeder 120 drückt diesen in seiner Ruhestellung gegen eine von einem das Gehäuseteil 118 durchdringenden Bolzen 121 gebildete Anschlagvorrichtung. In dieser mit ausgezogenen Linien dargestellten Ruhestellung umgreift die Hebelanordnung 114 den Schlaganker 104 derart, daß dieser mit seinen Schlagflächen 110 und 111 zwischen den Anschlägen 116a und 116b der Hebelanordnung 114 liegt. Im Bewegungsbereich des Schlagankers 104 ist weiterhin ein Schaltschloß 122 mit einem Betätigungsglied 123 angeordnet, wobei in der Ruhestellung der Hebelanordnung 114 deren zweiter Anschlag 116b zwischen dem Betätigungsglied 123 des Schaltschlosses 122 und der Schlagfläche 111 des Schlagankers 104 liegt.The exemplary embodiment shown in FIG. 3 of a trigger of the switch according to the invention has an electromagnet 100 with a coil 101, which is applied to a coil body 102 and is surrounded by an iron yoke 103. An essentially cylindrical impact armature 104 is held in the interior of the coil former 102 and consists of a central part 105 which has an extension 106 and 107 on each of its two end faces. The extensions 106 and 107 each protrude from the iron yoke 103 through a bore 108 and 109, respectively. The free ends of the extensions 106 and 107 each form a striking surface 110 or 111 of the striking anchor 104. In the region of its extension 106, the striking anchor 104 is displaceably mounted along the coil axis by means of a first compression spring 112 and in the region of the extension 107 by means of a further compression spring 113 . The trigger also has a lever arrangement 114. Like the lever arrangement of the exemplary embodiment according to FIGS. 1 and 2, this consists of a single approximately U-shaped angled lever with two legs 115 a and 115 b of different lengths, of which the longer leg 115 a has a first stop 116 a for the impact anchor 104 with its striking face 110 forms and the shorter leg 115b represents a second stop 116b for the impact anchor 104 with its face 111. The longer leg 115a of the lever arrangement 114 is pivotally mounted at one end 117 about an axis 119 held on a housing part 118 in the plane of movement of the impact anchor 104. A torsion spring 120 acting on the lever 114 presses it in its rest position against a stop device formed by a bolt 121 penetrating the housing part 118. In this rest position, shown with solid lines, the lever arrangement 114 engages around the impact anchor 104 in such a way that its impact surfaces 110 and 111 lie between the stops 116a and 116b of the lever arrangement 114. In the range of motion of the impact armature 104, a switch lock 122 with an actuating element 123 is further arranged, with the second stop 116b between the actuating element 123 of the key switch 122 and the striking surface 111 of the impact armature 104 in the rest position of the lever arrangement 114.

Bei einem ersten Kurzschlußstromimpuls wird der Schlaganker 104 in das Innere der Spule 101 in Richtung auf das Schaltschloß 122 zu hineingezogen. Bevor der Schlaganker 104 jedoch das Betätigungsglied 123 des Schaltschlosses 122 erreicht, trifft er mit seiner Schlagfläche 111 gegen den zweiten Anschlag 116b der Hebelanordnung 114, so daß seine Bewegung blockiert wird. Nach dem Ende des ersten Kurzschlußstromimpulses schwingt der Schlaganker 104 durch die zweite Druckfeder 113 beschleunigt in Richtung seiner Ruhelage zurück. Infolge seiner Massenträgheit bewegt sich dabei der Schlaganker 104 über seine Ruhestellung hinaus, wobei er mit seiner Schlagfläche 110 gegen den ersten Anschlag 116a des Hebels 114 schlägt und diesen entgegen der Federkraft der Drehfeder 120 in die strichliert dargestellte Lage schwenkt. In dieser Lage befindet sich der zweite Anschlag 116b des Hebels 114 außerhalb des Bewegungsbereiches des Schlagankers 104. Wenn hierauf kein weiterer Kurzschlußstromimpuls auftritt, bewegen sich der Schlaganker 104 un die Hebelanordnung 114 jeweils durch die erste Druckfeder 112 bzw. die Drehfeder 120 getrieben in ihre Ruhestellungen zurück.In the event of a first short-circuit current pulse, the impact armature 104 is drawn into the interior of the coil 101 in the direction of the switching mechanism 122. However, before the striking anchor 104 reaches the actuating member 123 of the key switch 122, it strikes with its striking surface 111 against the second stop 116b of the lever arrangement 114, so that its movement is blocked. After the end of the first short-circuit current pulse, the impact armature 104 swings back in the direction of its rest position accelerated by the second compression spring 113. As a result of its inertia, the striking anchor 104 moves beyond its rest position, with its striking surface 110 striking the first stop 116a of the lever 114 and pivoting it against the spring force of the torsion spring 120 into the position shown in broken lines. In this position, the second stop 116b of the lever 114 is outside the range of motion of the impact armature 104. If there is no further short-circuit current pulse, the impact armature 104 and the lever arrangement 114 move into their rest positions, driven by the first compression spring 112 and the torsion spring 120, respectively back.

Tritt jedoch ein zweiter Kurzschlußstromimpuls auf, so wird der Schlaganker 104 wieder in das Innere der Spule 103 gezogen. Oabei wird der Schlaganker 104 durch das Magnetfeld der Spule 103 schneller beschleunigt, als die Hebelanordnung 114 durch die Rückstellkraft der Drehfeder 120. Infolge dessen bewegt sich der Schlaganker 104 mit seiner Schlagfläche 111 an den zweiten Anschlag 116b des Hebels 114 vorbei gegen das Betätigungsglied 123 des Schaltschlosses 122, das unter der Krafteinwirkung des Schlagankers 104 eine Öffnung des nicht dargestellten Kontaktsystems bewirkt.However, if a second short-circuit current pulse occurs, the impact armature 104 is pulled back into the interior of the coil 103. The impact armature 104 is accelerated faster by the magnetic field of the coil 103 than the lever arrangement 114 by the restoring force of the Torsion spring 120. As a result, the striking armature 104 moves with its striking surface 111 past the second stop 116b of the lever 114 against the actuating element 123 of the switch lock 122, which causes the contact system (not shown) to open under the force of the striking armature 104.

Claims (6)

1. A switch with a selective tripping device comprising a striker (6; 104) which in the case of a current corresponding to the triggering current of the switch is operated by an electromagnet (1; 100) and acts upon a switching lock (23; 122) of the switch and comprising a pivotable lever arrangement (16; 144) which has a first and a second stop (20a, 20b; 116a, 116b) for the striker (6; 104), and embraces the latter in such a manner that the lever arrangement (16; 144) can be swivelled by the striker (6; 104) via the first stop (20a; 116a), from a rest position into a position in which the second stop (20b; 116b) allows the striker (6; 104) to act upon the switching lock (23; 122), characterised in that the lever arrangement (16; 114) comprises a single lever which in the rest position has its second stop (20b; 116b) positioned between the striker (6; 104) and the switching lock (23; 122) and in the swivelled position holds the second stop (20b; 116b) outside the movement zone of the striker (6; 104) in a position in which the striker (6; 104) can directly act upon the switching lock (23; 122).
2. A switch as claimed in Claim 1, characterised in that the lever is bent so as to be approximately U-shaped and has flanks of different lengths (17a; 17b; 115a, 115b), where at one end (18; 117) the longer flank (17a; 115a) is mounted so as to be pivotable about an axis (19; 119) and forms the first stop (20a; 116a) and the shorter flank (17b; 115b) of lever forms the second stop (20b; 116b).
3. A switch as claimed in Claim 2, characterised in that the striker (6) is designed in the form of a swinging arm, whose free end (13) is arranged so as to interact with the stops (20a, 20b) of the lever arrangement (16).
4. A switch as claimed in Claim 3, characterised in that the electromagnet (1) comprises a current rail (2), to which an iron yoke (3) is secured.
5. A switch as claimed in Claim 4, characterised in that the iron yoke (3) is horseshoe-shaped and arranged on the current rail (2) in such a manner that the end faces (9, 10) of its two flanks (4, 5) which lie transversely to the plane of movement of the striker (6) are arranged opposite it.
6. A switch as claimed in Claim 2, characterised in that the striker (104) is essentially cylindrical and that the electromagnet (100) comprises a coil (101), within which the striker (104) is positioned so as to be displaceable along the coil axis between the stops (116a, 116b) of the lever (114).
EP84730133A 1983-12-22 1984-12-04 Switch with a selective tripping device Expired EP0148112B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3347121 1983-12-22
DE19833347121 DE3347121A1 (en) 1983-12-22 1983-12-22 SWITCH WITH A SELECTIVE TRIGGER

Publications (2)

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EP0148112A1 EP0148112A1 (en) 1985-07-10
EP0148112B1 true EP0148112B1 (en) 1987-03-18

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ID=6218181

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Application Number Title Priority Date Filing Date
EP84730133A Expired EP0148112B1 (en) 1983-12-22 1984-12-04 Switch with a selective tripping device

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US (1) US4599590A (en)
EP (1) EP0148112B1 (en)
JP (1) JPS60157130A (en)
DE (2) DE3347121A1 (en)

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Publication number Priority date Publication date Assignee Title
CH672036A5 (en) * 1986-12-23 1989-10-13 Sprecher & Schuh Ag
US4876521A (en) * 1987-08-25 1989-10-24 Siemens Energy & Automation, Inc. Tripping coil with flux shifting coil and booster coil
US4801910A (en) * 1988-02-10 1989-01-31 Siemens Energy And Automation, Inc. Magnetic actuating mechanism
JP2954936B1 (en) * 1998-08-14 1999-09-27 寺崎電気産業株式会社 Circuit breaker trip device
DE10141123B4 (en) * 2001-08-22 2004-01-29 Aeg Niederspannungstechnik Gmbh & Co Kg Tripping unit for circuit breakers
KR102053710B1 (en) * 2019-06-11 2019-12-09 (주)공영엔지니어링 A Micro Filter Backwashing Filtering System

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569879A (en) * 1969-12-08 1971-03-09 Ite Imperial Corp Circuit breaker trip unit assembly with auxiliary time delay armature
DE2854568C2 (en) * 1978-12-18 1982-09-02 Brown, Boveri & Cie Ag, 6800 Mannheim Selective protection device for a current-limiting switch
DE2945618A1 (en) * 1979-10-23 1981-05-07 BBC AG Brown, Boveri & Cie., Baden, Aargau Opening device for over-current switch - converts magnetic energy of monitored current into potential energy for release to open contacts

Also Published As

Publication number Publication date
JPS60157130A (en) 1985-08-17
DE3347121A1 (en) 1985-07-11
JPH0150056B2 (en) 1989-10-27
EP0148112A1 (en) 1985-07-10
US4599590A (en) 1986-07-08
DE3462731D1 (en) 1987-04-23

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