EP0720192A1 - Device for accelerated closure of electrical contacts - Google Patents

Device for accelerated closure of electrical contacts Download PDF

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Publication number
EP0720192A1
EP0720192A1 EP95111687A EP95111687A EP0720192A1 EP 0720192 A1 EP0720192 A1 EP 0720192A1 EP 95111687 A EP95111687 A EP 95111687A EP 95111687 A EP95111687 A EP 95111687A EP 0720192 A1 EP0720192 A1 EP 0720192A1
Authority
EP
European Patent Office
Prior art keywords
contact
holding element
engagement
switching
swivel bracket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95111687A
Other languages
German (de)
French (fr)
Other versions
EP0720192B1 (en
Inventor
Peter Dipl.-Ing. Flohr
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.)
Heinrich Kopp GmbH and Co KG
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Heinrich Kopp GmbH and Co KG
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Publication of EP0720192A1 publication Critical patent/EP0720192A1/en
Application granted granted Critical
Publication of EP0720192B1 publication Critical patent/EP0720192B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms
    • H01H2300/048—Snap closing by latched movable contact, wherein the movable contact is held in a minimal distance from the fixed contact during first phase of closing sequence in which a closing spring is charged
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a device for accelerating the switch-on process between a stationary electrical contact and a movable electrical contact of an electrical switching device, in particular a circuit breaker, which can be removed, the movable contact being arranged on a swivel bracket acted upon by a contact spring in the switch-on direction and for switching on with the participation of a Switch lever can be brought into its contact position on the stationary contact.
  • the invention has for its object to develop a device of the type mentioned in such a way that an existing switchgear without a major design change independent of the speed of actuation of the switching lever contact switching speed is achieved.
  • a holding element is provided in the device according to the invention, the engagement of which on the swivel bracket biased by the contact spring can be released by means of the switching lever when switched on.
  • the swivel bracket which is acted upon by the stored energy of the contact spring, is suddenly released during switch-on and can hit the stationary contact under the action of the contact spring, whereby any oxide layers present are broken through.
  • the invention thus realizes a so-called momentary switch-on, which counteracts the occurrence of switch-on arcs and ensures reliable contact closure without being dependent on the operating speed of the switch lever and without the switch-off process being impaired. This is particularly important for circuit breakers.
  • the holding element can be attached to the swivel bracket at any suitable Attack a place that does not interfere with the other functional processes and is adapted to the spatial conditions.
  • the holding element engages in a preferably sawtooth-shaped engagement recess, preferably laterally on the swivel bracket.
  • This engagement recess can be designed without great manufacturing effort in the manufacture of the swivel bracket, the engagement recess must have a holding edge or surface in order to realize the holding attack by the holding element.
  • the preferred embodiment of the engagement recess as a saw tooth with an inlet and a holding flank has the advantage that the holding element can easily and reliably engage the swivel bracket when the swivel bracket is moved from the OFF switch position to the ON switch position.
  • the holding element consists of a resilient material and can be moved away elastically from its engagement position on the swivel bracket.
  • a structurally particularly simple and space-saving solution is obtained in particular if the holding element is formed with an extended end of the contact spring. In this case, no additional element is required, but the existing contact spring is only slightly modified.
  • the holding element can also be designed as a housing-fixed spring element with a contact and engagement section.
  • the shift lever responsible for the release movement for the sudden release of the swivel bracket has a correspondingly shaped control surface against which the holding element rests.
  • This molded control surface allows all other functional design features of the shift lever to be retained, and it is advantageously possible to control the holding element by attack can be adapted to the respective needs.
  • a circuit breaker 10 is shown schematically in FIG. 1, which has a stationary contact 11 and a contact 12 which can be moved away from the contact position for contact separation and which is arranged on a leg 13 of a U-shaped pivot bracket 14.
  • the swivel bracket 14 has a second leg 15, which is supported in a swivel bearing 16.
  • the leg 15 is by a compression spring 17 via a bell crank 18 acted upon in the contact closing direction.
  • the lower end 19 of the compression spring 17 is held in a stationary manner near the deflection region 16 in a housing 20 of the circuit breaker 10.
  • the opposite end 21 of the compression spring 17 is passed through a longitudinal slot in the leg 15 in a manner not shown, and is connected to an angled part 22 of a conductor 23.
  • the conductor 23 can be connected to an electrical line via a connecting terminal 24.
  • a device 25 according to the invention is formed by a holding element 26 and, as can be seen in connection with FIG. 3, by a sawtooth-like recess 27 and a control surface 28 (FIG. 3) on a shift lever 29.
  • the sawtooth-like engagement recess 27 has an engagement flank 32 and a contact surface 33 in the region of the web 31 of the bracket 14.
  • the holding element 26 consists of an extended end of the contact spring 17 and is biased for lateral engagement with the swivel bracket 14 in order to achieve the engagement.
  • the upper end 30 of the holding element 26 is bent to make contact with the control surface 28 formed on the shift lever 29.
  • the pivoting direction of the shift lever for the switch-on movement is shown by a curved arrow.
  • a straight arrow points to the end 30 of the holding element 26, which indicates the intended disengagement movement of the holding element 26 from the sawtooth-like engagement recess 27.
  • the switch lever 29 belongs to a release lever arrangement 35 of the circuit breaker 10 and interacts with a strong contact-opening switch spring 36 and with a manually operated switch toggle 37 for a latched ready position and an unlatched OFF position.
  • a strong contact-opening switch spring 36 At the lower end of the switching lever 29 there is an attack formation 38, by means of which the leg 13 of the swivel bracket 14 can be moved into the position shown in FIG. 1 against the action of the contact spring 17 when the circuit breaker 10 is triggered, in which the holding element 26 rests on the web 31, but is not yet in the engagement recess 27.
  • the triggering lever arrangement 35 can be triggered by a triggering device 39 which is connected to a connection terminal 40 and which is connected to a connecting terminal 40 and in FIG. 1 above an arc quenching chamber 41 in the housing 20 of the circuit breaker from a certain triggering current and / or from a thermal heating that occurs 10 is arranged.
  • FIG 3 illustrates the functional relationship between the disengagement movement of the holding element 26 and the control surface 28 of the shift lever 29 responsible for this disengagement movement, which becomes effective when the shift lever 29 is rotated counterclockwise in a second phase of the engagement movement after the holding element 26 has entered the engagement recess 27 from its contact with the web 31 in a first phase of the switch-on movement.
  • the innovation is particularly notable for its simple structure, which allows the effect of instantaneous activation to be integrated into existing switching devices with little effort.
  • only one end 21 of the contact spring 17 is to be extended or, alternatively, a spring element fixed to the housing is to be provided, the swivel bracket 14 belonging to the movable contact 12 is to be provided with an engagement recess 27 or latching point, and a control surface 28 is to be attached to the switching lever 29 as a notching bevel in order to attach the desired Ensure function.
  • the device according to the invention can be used without problems in an otherwise unchanged construction of an electrical switching device, in particular a circuit breaker 10.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Breakers (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Keying Circuit Devices (AREA)
  • Relay Circuits (AREA)
  • Thermally Actuated Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The appts. accelerates the switching on process between a stationary electric contact (11) and a movable electric contact (12) of a switch device, e.g. a protective circuit breaker (10). The movable contact (12) is arranged on a pivot arm (14). The latter (14) is struck by a contact spring (17) in the switching on direction. To switch on, the movable contact (12) is brought to the stationary contact (11) by the action of a switch lever (29). The device includes a holding element (26) which holds the pivot arm (14) which is held under tension by the contact spring (17). The holding element (26) is released from its engagement with the pivot arm (14) on switching on, by means of the switch lever (29). An engaging recess (27) may be formed on the pivot arm (14) for the holding element (26).

Description

Die Erfindung betrifft eine Vorrichtung zur Beschleunigung des Einschaltvorgangs zwischen einem stationären elektrischen Kontakt und einem von diesen entfernbaren beweglichen elektrischen Kontakt eines elektrischen Schaltgerätes, insbesondere eines Leitungsschutzschalters, wobei der bewegliche Kontakt an einem von einer Kontaktfeder in Einschaltrichtung beaufschlagten Schwenkbügel angeordnet und zum Einschalten unter Mitwirkung eines Schalthebels in seine Anlagestellung am stationären Kontakt bringbar ist.The invention relates to a device for accelerating the switch-on process between a stationary electrical contact and a movable electrical contact of an electrical switching device, in particular a circuit breaker, which can be removed, the movable contact being arranged on a swivel bracket acted upon by a contact spring in the switch-on direction and for switching on with the participation of a Switch lever can be brought into its contact position on the stationary contact.

Bei derartigen elektrischen Schaltgeräten tritt bisher ein sogenannter Einschaltlichtbogen auf, der die elektrischen Kontakte beansprucht. Es entstehen unerwünschte nicht leitende Oxide mit der Folge, daß in nachteiliger Weise der Kontaktspannungsabfall erhöht und die Kontakterwärmung vergrößert wird. Diesen unerwünschten Effekten könnte man dadurch begegnen, daß man die Kontaktanlagekraft so erhöht, daß die Oxidschichten beim Einschalten zerstört werden. Der Einsatz einer stärkeren Kontaktfeder oder einer zusätzlichen Andruckfeder hat jedoch insbesondere bei Leitungsschutzschaltern den Nachteil, daß mit der vergrößerten Kontaktkraft zwangsläufig schlechtere Ergebnisse bei der Kurzschlußabschaltung in Kauf genommen werden müssen. Darüberhinaus hängt die Kontakteinschaltgeschwindigkeit in diesem Fall nicht von der stärkeren Dimensionierung einer Kontaktfeder, sondern von der Betätigungsgeschwindigkeit des Schalthebels ab.In such electrical switching devices, a so-called switch-on arc has occurred so far, which claims the electrical contacts. Unwanted non-conductive oxides are produced, with the result that the contact voltage drop is increased disadvantageously and the contact heating is increased. These undesirable effects could be countered by increasing the contact contact force so that the oxide layers are destroyed when switched on. However, the use of a stronger contact spring or an additional pressure spring has the disadvantage, in particular in the case of circuit breakers, that the increased contact force inevitably means that poorer results in the short-circuit shutdown must be accepted. In addition, the contact closing speed in this case does not depend on the larger dimensions of a contact spring, but on the actuation speed of the switching lever.

Alternativ besteht auch die Möglichkeit, die gespeicherte Energie einer für das Aufreißen der Kontakte benötigten Schaltfeder bei der Einschaltbewegung einzusetzen. Hierzu sind jedoch aufwendige Änderungen der Schalthebelkinematik nötig. Außerdem hängt auch in diesem Fall die Kontakteinschaltgeschwindigkeit mit der Betätigungsgeschwindigkeit des Schalthebels zusammen.Alternatively, there is also the possibility of using the stored energy of a switching spring required for opening the contacts during the switch-on movement. However, this requires complex changes to the gear lever kinematics. In this case, too, the speed at which the contacts are switched on is related to the speed at which the lever is actuated.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Gattung derart weiterzubilden, daß bei vorhandenen Schaltgeräten ohne größere konstruktive Änderung eine von der Betätigungsgeschwindigkeit des Schalthebels unabhängige Kontakteinschaltgeschwindigkeit erreicht wird.The invention has for its object to develop a device of the type mentioned in such a way that an existing switchgear without a major design change independent of the speed of actuation of the switching lever contact switching speed is achieved.

Erfindungsgemäß wird diese Aufgabe durch die im Patentanspruch 1 gekennzeichneten Merkmale gelöst. Bevorzugte Merkmale, die die Erfindung vorteilhaft weiterbilden, sind den nachgeordneten Patentansprüchen zu entnehmen.According to the invention, this object is achieved by the features characterized in claim 1. Preferred features which advantageously further develop the invention can be found in the subordinate claims.

In vorteilhafter Weise ist bei der erfindungsgemäßen Vorrichtung ein Halteelement vorgesehen, dessen Angriff an dem durch die Kontaktfeder vorgespannten Schwenkbügel mittels des Schalthebels beim Einschalten lösbar ist. Hierdurch kann der Schwenkbügel, der durch die gespeicherte Energie der Kontaktfeder beaufschlagt ist, während des Einschaltens schlagartig freigegeben und unter der Wirkung der Kontaktfeder auf den stationären Kontakt auftreffen, wobei eventuell vorhandene Oxidschichten durchschlagen werden. Die Erfindung verwirklicht damit eine sogenannte Momenteinschaltung, die dem Entstehen von Einschaltlichtbögen entgegenwirkt und eine zuverlässige Kontaktschließung gewährleistet, ohne daß eine Abhängigkeit von der Betätigungsgeschwindigkeit des Schalthebels besteht und ohne daß der Ausschaltvorgang beeinträchtigt wird. Dies ist vor allem bei Leitungsschutzschaltern von wesentlicher Bedeutung.In an advantageous manner, a holding element is provided in the device according to the invention, the engagement of which on the swivel bracket biased by the contact spring can be released by means of the switching lever when switched on. As a result, the swivel bracket, which is acted upon by the stored energy of the contact spring, is suddenly released during switch-on and can hit the stationary contact under the action of the contact spring, whereby any oxide layers present are broken through. The invention thus realizes a so-called momentary switch-on, which counteracts the occurrence of switch-on arcs and ensures reliable contact closure without being dependent on the operating speed of the switch lever and without the switch-off process being impaired. This is particularly important for circuit breakers.

Das Halteelement kann an dem Schwenkbügel an jeder geeigneten Stelle angreifen, die den sonstigen funktionellen Ablauf nicht beeinträchtigt und an die räumlichen Gegebenheiten angepaßt ist. Gemäß einer bevorzugten Ausgestaltung der Erfindung greift das Halteelement in eine vorzugsweise sägezahnartig geformte Eingriffsausnehmung, vorzugsweise seitlich an dem Schwenkbügel an. Diese Eingriffsausnehmung läßt sich ohne großen Herstellungsaufwand bei der Herstellung des Schwenkbügels mitgestalten, wobei die Eingriffsausnehmung eine Haltekante bzw. -fläche aufweisen muß, um den haltenden Angriff durch das Halteelement zu realisieren. Dabei hat die bevorzugte Ausgestaltung der Eingriffsausnehmung als Sägezahn mit einer Einlauf- und einer Halteflanke den Vorteil, daß das Halteelement bei der Bewegung des Schwenkbügels aus der AUS-Schaltstellung in die EIN-Schaltstellung problemlos und zuverlässig an den Schwenkbügel angreifen kann.The holding element can be attached to the swivel bracket at any suitable Attack a place that does not interfere with the other functional processes and is adapted to the spatial conditions. According to a preferred embodiment of the invention, the holding element engages in a preferably sawtooth-shaped engagement recess, preferably laterally on the swivel bracket. This engagement recess can be designed without great manufacturing effort in the manufacture of the swivel bracket, the engagement recess must have a holding edge or surface in order to realize the holding attack by the holding element. The preferred embodiment of the engagement recess as a saw tooth with an inlet and a holding flank has the advantage that the holding element can easily and reliably engage the swivel bracket when the swivel bracket is moved from the OFF switch position to the ON switch position.

Gemäß einer bevorzugten Ausgestaltung der Erfindung besteht das Halteelement aus einem federnden Material und ist aus seiner Angriffsstellung an dem Schwenkbügel elastisch wegbewegbar. Eine konstruktiv besonders einfache und platzsparende Lösung ergibt sich insbesondere dann, wenn das Halteelement mit einem verlängerten Ende der Kontaktfeder gebildet ist. In diesem Fall wird kein zusätzliches Element benötigt, sondern die vorhandene Kontaktfeder nur geringfügig modifiziert. Alternativ kann das Halteelement auch als gehäusefestes Federelement mit einem Anlage- und Eingriffsabschnitt ausgebildet sein.According to a preferred embodiment of the invention, the holding element consists of a resilient material and can be moved away elastically from its engagement position on the swivel bracket. A structurally particularly simple and space-saving solution is obtained in particular if the holding element is formed with an extended end of the contact spring. In this case, no additional element is required, but the existing contact spring is only slightly modified. Alternatively, the holding element can also be designed as a housing-fixed spring element with a contact and engagement section.

Für das Lösen des Angriffs des Halteelements an dem Schwenkbügel ist es aus kinematischen und herstellungstechnischen Gründen besonders günstig, wenn der für die Auslösebewegung für die schlagartige Freigabe des Schwenkbügels verantwortliche Schalthebel eine entsprechend angeformte Steuerfläche aufweist, an der das Halteelement anliegt. Durch diese angeformte Steuerfläche können alle anderen funktionsbedingten Gestaltungsmerkmale des Schalthebels beibehalten werden, und es ist in vorteilhafter Weise eine Angriffssteuerung für das Halteelement möglich, die den jeweiligen Bedürfnissen entsprechend angepaßt werden kann.For releasing the attack of the holding element on the swivel bracket, it is particularly favorable for kinematic and manufacturing reasons if the shift lever responsible for the release movement for the sudden release of the swivel bracket has a correspondingly shaped control surface against which the holding element rests. This molded control surface allows all other functional design features of the shift lever to be retained, and it is advantageously possible to control the holding element by attack can be adapted to the respective needs.

Insbesondere ist es möglich, in einer ersten Phase bei der Einschaltbewegung des Schalthebels den Schwenkbügel bis zum Eingriff des Halteelements in die Eingriffsausnehmung mit der Schalthebelbewegung zu koppeln und dann nach Eingriff des Halteelements für eine zweite Bewegungsphase des Schalthebels zu entkoppeln, bis dann durch die Steuerfläche des Schalthebels das Halteelement aus dem Eingriff mit dem Schwenkbügel gebracht wird und schlagartig frei unter Wirkung der gespannten Kontaktfeder auf den stationären Kontakt auftreffen kann.In particular, it is possible to couple the swivel bracket with the shift lever movement until the engagement of the holding element in the engagement recess with the shift lever movement in a first phase when the switching lever is switched on, and then to decouple it after the engagement of the holding element for a second movement phase of the switching lever, until then through the control surface of the Switching lever, the holding element is brought out of engagement with the swivel bracket and can suddenly hit the stationary contact under the action of the tensioned contact spring.

Nachfolgend wird die Erfindung unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Es zeigen:

Fig. 1
ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung im Einsatz bei einem Leitungsschutzschalter, der sich in seiner AUS-Schaltstellung befindet;
Fig. 2
eine Darstellung ähnlich Fig. 1, jedoch in einer Stellung, in der beim Einschalten gerade das Halteelement aus dem Eingriff an dem Schwenkbügel gelöst wird; und
Fig. 3
eine perspektivische rückseitige vergrößerte Teildarstellung im Bereich des Halteelements zur Veranschaulichung des Zusammenwirkens zwischen Schalthebelsteuerfläche und Halteelement.
The invention is explained in more detail below with reference to the accompanying drawings. Show it:
Fig. 1
an embodiment of the device according to the invention in use in a circuit breaker which is in its OFF switch position;
Fig. 2
a view similar to Figure 1, but in a position in which the holding element is released from engagement with the pivot bracket when switching on. and
Fig. 3
a perspective rear enlarged partial view in the region of the holding element to illustrate the interaction between the shift lever control surface and the holding element.

In Fig. 1 ist schematisiert ein Leitungsschutzschalter 10 dargestellt, der einen stationären Kontakt 11 und einen aus der Anlagestellung an diesem zur Kontakttrennung wegbewegbaren Kontakt 12 aufweist, der an einem Schenkel 13 eines U-förmigen Schwenkbügels 14 angeordnet ist. Der Schwenkbügel 14 besitzt einen zweiten Schenkel 15, der sich in einem Schwenklager 16 abstützt. Der Schenkel 15 wird durch eine Druckfeder 17 über einen Umlenkhebel 18 in Kontaktschließrichtung beaufschlagt. Das untere Ende 19 der Druckfeder 17 ist ortsfest nahe des Umlenkbereichs 16 in einem Gehäuse 20 des Leitungsschutzschalters 10 gehalten. Das gegenüberliegende Ende 21 der Druckfeder 17 ist in nicht dargestellter Weise durch einen Längsschlitz in dem Schenkel 15 hindurchgeführt, und mit einem abgewinkelten Teil 22 eines Leiters 23 verbunden. Über eine Anschlußklemme 24 ist der Leiter 23 an eine elektrische Leitung anschließbar.A circuit breaker 10 is shown schematically in FIG. 1, which has a stationary contact 11 and a contact 12 which can be moved away from the contact position for contact separation and which is arranged on a leg 13 of a U-shaped pivot bracket 14. The swivel bracket 14 has a second leg 15, which is supported in a swivel bearing 16. The leg 15 is by a compression spring 17 via a bell crank 18 acted upon in the contact closing direction. The lower end 19 of the compression spring 17 is held in a stationary manner near the deflection region 16 in a housing 20 of the circuit breaker 10. The opposite end 21 of the compression spring 17 is passed through a longitudinal slot in the leg 15 in a manner not shown, and is connected to an angled part 22 of a conductor 23. The conductor 23 can be connected to an electrical line via a connecting terminal 24.

Eine erfindungsgemäße Vorrichtung 25 ist durch ein Halteelement 26 und, wie im Zusammenhang mit Fig. 3 ersichtlich, durch eine sägezahnartige Ausnehmung 27 sowie einer Steuerfläche 28 (Fig. 3) an einem Schalthebel 29 gebildet. Die sägezahnartige Eingriffsausnehmung 27 weist im Bereich des Stegs 31 des Bügels 14 eine Eingriffsflanke 32 und eine Anlagefläche 33 auf. Das Halteelement 26 besteht aus einem verlängerten Ende der Kontaktfeder 17 und ist zur seitlichen Anlage an den Schwenkbügel 14 zur Erzielung des Eingriffs vorgespannt. Das obere Ende 30 des Halteelements 26 ist zur Kontaktierung der an dem Schalthebel 29 angeformten Steuerfläche 28 abgebogen. In Fig. 3 ist durch einen gekrümmten Pfeil die Schwenkrichtung des Schalthebels für die Einschaltbewegung gezeigt. Auf das Ende 30 des Halteelements 26 weist ein gerader Pfeil, der die vorgesehene Ausrückbewegung des Halteelements 26 aus der sägezahnartigen Eingriffsausnehmung 27 andeutet.A device 25 according to the invention is formed by a holding element 26 and, as can be seen in connection with FIG. 3, by a sawtooth-like recess 27 and a control surface 28 (FIG. 3) on a shift lever 29. The sawtooth-like engagement recess 27 has an engagement flank 32 and a contact surface 33 in the region of the web 31 of the bracket 14. The holding element 26 consists of an extended end of the contact spring 17 and is biased for lateral engagement with the swivel bracket 14 in order to achieve the engagement. The upper end 30 of the holding element 26 is bent to make contact with the control surface 28 formed on the shift lever 29. In Fig. 3, the pivoting direction of the shift lever for the switch-on movement is shown by a curved arrow. A straight arrow points to the end 30 of the holding element 26, which indicates the intended disengagement movement of the holding element 26 from the sawtooth-like engagement recess 27.

Der Schalthebel 29 gehört zu einer Auslösehebelanordnung 35 des Leitungsschutzschalters 10 und wirkt mit einer starken kontaktaufreißenden Schaltfeder 36 sowie mit einem manuell zu handhabenden Schaltknebel 37 zu einer verklinkten Bereitschaftsstellung und einer entklinkten AUS-Stellung zusammen. Am unteren Ende des Schalthebels 29 befindet sich eine Angriffsanformung 38, durch die der Schenkel 13 des Schwenkbügels 14 gegen die Wirkung der Kontaktfeder 17 bei Auslösung des Leitungsschutzschalters 10 in die in Fig. 1 gezeigte Stellung bewegbar ist, bei der das Halteelement 26 an dem Steg 31 anliegt, sich jedoch noch nicht in der Eingriffsausnehmung 27 befindet.The switch lever 29 belongs to a release lever arrangement 35 of the circuit breaker 10 and interacts with a strong contact-opening switch spring 36 and with a manually operated switch toggle 37 for a latched ready position and an unlatched OFF position. At the lower end of the switching lever 29 there is an attack formation 38, by means of which the leg 13 of the swivel bracket 14 can be moved into the position shown in FIG. 1 against the action of the contact spring 17 when the circuit breaker 10 is triggered, in which the holding element 26 rests on the web 31, but is not yet in the engagement recess 27.

Ausgelöst werden kann die Auslösehebelanordnung 35 durch eine ab einem bestimmten Auslösestrom und/oder ab einer auftretenden thermischen Erhitzung durch eine Auslöseeinrichtung 39, die in Verbindung mit einer Anschlußklemme 40 steht und in Fig. 1 oberhalb einer Lichtbogen-Löschkammer 41 in dem Gehäuse 20 des Leitungsschutzschalters 10 angeordnet ist.The triggering lever arrangement 35 can be triggered by a triggering device 39 which is connected to a connection terminal 40 and which is connected to a connecting terminal 40 and in FIG. 1 above an arc quenching chamber 41 in the housing 20 of the circuit breaker from a certain triggering current and / or from a thermal heating that occurs 10 is arranged.

Die perspektivisch vergrößerte Ausschnittsdarstellung von Fig. 3 veranschaulicht den funktionellen Zusammenhang zwischen der Ausrückbewegung des Halteelements 26 und der für diese Ausrückbewegung verantwortlichen Steuerfläche 28 des Schalthebels 29, die bei einer Drehung des Schalthebels 29 gegen den Uhrzeigersinn in einer zweiten Phase der Einschaltbewegung wirksam wird, nachdem das Halteelement 26 in einer ersten Phase der Einschaltbewegung aus seiner Anlage an dem Steg 31 in die Eingriffsausnehmung 27 eingetreten ist.3 illustrates the functional relationship between the disengagement movement of the holding element 26 and the control surface 28 of the shift lever 29 responsible for this disengagement movement, which becomes effective when the shift lever 29 is rotated counterclockwise in a second phase of the engagement movement after the holding element 26 has entered the engagement recess 27 from its contact with the web 31 in a first phase of the switch-on movement.

Sobald das Halteelement 26 aus seiner Anlage an der Anlagefläche 33 der Eingriffsausnehmung 27 durch die Steuerfläche 28 seitlich herausgedrückt worden ist, kann der Schwenkbügel 14 schlagartig mit dem beweglichen Kontakt 12 auf den stationären Kontakt 11 aufschlagen.As soon as the holding element 26 has been pressed out laterally from its contact with the contact surface 33 of the engagement recess 27 by the control surface 28, the swivel bracket 14 can suddenly hit the stationary contact 11 with the movable contact 12.

Ersichtlich zeichnet sich die Neuerung besonders durch ihren einfachen Aufbau aus, der es gestattet, mit geringem Aufwand in vorhandenen Schaltgeräten den Effekt der Momenteinschaltung zu integrieren. So ist lediglich das eine Ende 21 der Kontaktfeder 17 zu verlängern oder alternativ ein gehäusefestes Federelement vorzusehen, der zum beweglichen Kontakt 12 gehörende Schwenkbügel 14 mit einer Eingriffsausnehmung 27 bzw. Verklinkungsstelle zu versehen und an dem Schalthebel 29 eine Steuerfläche 28 als Entklinkungsschräge anzubringen, um die gewünschte Funktion sicherzustellen. Hierdurch läßt sich die erfindungsgemäße Vorrichtung problemlos in einer sonst unveränderten Konstruktion eines elektrischen Schaltgerätes, insbesondere eines Leitungsschutzschalters 10, einsetzen.The innovation is particularly notable for its simple structure, which allows the effect of instantaneous activation to be integrated into existing switching devices with little effort. Thus, only one end 21 of the contact spring 17 is to be extended or, alternatively, a spring element fixed to the housing is to be provided, the swivel bracket 14 belonging to the movable contact 12 is to be provided with an engagement recess 27 or latching point, and a control surface 28 is to be attached to the switching lever 29 as a notching bevel in order to attach the desired Ensure function. As a result, the device according to the invention can be used without problems in an otherwise unchanged construction of an electrical switching device, in particular a circuit breaker 10.

Claims (12)

Vorrichtung zur Beschleunigung des Einschaltvorgangs zwischen einem stationären elektrischen Kontakt (11) und einem von diesen entfernbaren beweglichen elektrischen Kontakt (12) eines elektrischen Schaltgerätes, insbesondere eines Leitungsschutzschalters (10),
wobei der bewegliche Kontakt (12) an einem von einer Kontaktfeder (17) in Einschaltrichtung beaufschlagten Schwenkbügel (14) angeordnet und zum Einschalten unter Mitwirkung eines Schalthebels (29) in seine Anlagestellung an dem stationären Kontakt (11) bringbar ist,
gekennzeichnet durch
ein Halteelement (26), dessen Angriff an dem durch die Kontaktfeder (17) vorgespannten Schwenkbügel (14) mittels des Schalthebels (29) beim Einschalten lösbar ist.Device for accelerating the switch-on process between a stationary electrical contact (11) and a movable electrical contact (12) of an electrical switching device, in particular a circuit breaker (10), which can be removed therefrom,
wherein the movable contact (12) is arranged on a swivel bracket (14) acted upon by a contact spring (17) in the switch-on direction and can be brought into its contact position on the stationary contact (11) with the aid of a switching lever (29),
marked by
a holding element (26), the engagement of which on the swivel bracket (14) biased by the contact spring (17) can be released by means of the switching lever (29) when switched on. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an dem Schwenkbügel (14) für das Halteelement (26) eine Eingriffsausnehmung (27) gebildet ist.Apparatus according to claim 1, characterized in that an engagement recess (27) is formed on the swivel bracket (14) for the holding element (26). Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Eingriffsausnehmung (27) seitlich an dem Schwenkbügel (14) vorgesehen ist.Apparatus according to claim 2, characterized in that the engagement recess (27) is provided on the side of the swivel bracket (14). Vorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Eingriffsausnehmung (27) sägezahnartig (32, 33) geformt ist.Apparatus according to claim 2 or 3, characterized in that the engagement recess (27) is shaped like a saw tooth (32, 33). Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Halteelement (26) aus einem federnden Material besteht und aus seiner Angriffsstellung elastisch wegbewegbar ist.Device according to one of the preceding claims, characterized in that the holding element (26) consists of a resilient material and can be moved away elastically from its position of engagement. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Halteelement (26) mit einem verlängerten Ende (21) der Kontaktfeder (17) gebildet ist.Apparatus according to claim 5, characterized in that the holding element (26) is formed with an extended end (21) of the contact spring (17). Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Halteelement (26) ein abgebogenes Ende (30) für den Angriff durch den Schalthebel (29) besitzt.Device according to one of the preceding claims, characterized in that the holding element (26) has a bent end (30) for engagement by the shift lever (29). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Halteelement (26) als gehäusefestes Federelement mit einem Anlage- und Eingriffsabschnitt ausgebildet ist.Apparatus according to claim 5, characterized in that the holding element (26) is designed as a housing-fixed spring element with a contact and engagement section. Vorrichtung nach Ansprüchen 1 - 8, dadurch gekennzeichnet, daß der Anlage- und Eingriffsabschnitt bezüglich des Federelementes abgewinkelt ist.Device according to claims 1-8, characterized in that the contact and engagement section is angled with respect to the spring element. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Schalthebel (29) für das Halteelement (26), vorzugsweise für dessen abgebogenes Ende (30) bzw. Anlage- und Eingriffsabschnitt, eine angeformte Steuerfläche (28) aufweist.Device according to one of the preceding claims, characterized in that the switching lever (29) for the holding element (26), preferably for its bent end (30) or the contact and engagement section, has an integrally formed control surface (28). Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Halteelement (26) in einer ersten Phase des Einschaltens bis zum Lösen von dem Schwenkbügel (14) mit Vorspannung an diesem anliegt.Device according to one of the preceding claims, characterized in that the holding element (26) bears against the swivel bracket (14) with a prestress in a first phase of switching on until it is released. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Halteelement (26) in einer zweiten Phase des Einschaltens nach dem Lösen von dem Schwenkbügel (14) von diesem beabstandet ist.Device according to one of the preceding claims, characterized in that the holding element (26) is spaced apart from the swivel bracket (14) in a second phase of switching on after it has been released.
EP95111687A 1994-12-23 1995-07-25 Device for accelerated closure of electrical contacts Expired - Lifetime EP0720192B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446411 1994-12-23
DE4446411A DE4446411A1 (en) 1994-12-23 1994-12-23 Device for accelerating the switch-on process between electrical contacts

Publications (2)

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EP0720192A1 true EP0720192A1 (en) 1996-07-03
EP0720192B1 EP0720192B1 (en) 1999-12-29

Family

ID=6536986

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Application Number Title Priority Date Filing Date
EP95111687A Expired - Lifetime EP0720192B1 (en) 1994-12-23 1995-07-25 Device for accelerated closure of electrical contacts

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EP (1) EP0720192B1 (en)
AT (1) ATE188310T1 (en)
DE (2) DE4446411A1 (en)
DK (1) DK0720192T3 (en)
ES (1) ES2141871T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108960A1 (en) * 2001-02-16 2002-08-29 Ego Elektro Geraetebau Gmbh Electromechanical switching device
CN114446732B (en) * 2022-04-08 2022-07-22 江苏东方四通科技股份有限公司 Circuit breaker, power cabinet with structure and power assisting method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811604A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Automatic circuit breakers
US2811605A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Circuit breaker
FR1230428A (en) * 1957-05-17 1960-09-15 Device for causing sudden closing and slow breaking of moving contacts in circuit breakers and switches
FR2552930A1 (en) * 1983-10-03 1985-04-05 Licentia Gmbh Switch operating mechanism for electric safety switch
DE9311791U1 (en) * 1993-08-07 1993-10-07 Heinrich Kopp Ag, 63796 Kahl Contact arrangement for protective switching devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811604A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Automatic circuit breakers
US2811605A (en) * 1953-12-11 1957-10-29 Fed Electric Prod Co Circuit breaker
FR1230428A (en) * 1957-05-17 1960-09-15 Device for causing sudden closing and slow breaking of moving contacts in circuit breakers and switches
FR2552930A1 (en) * 1983-10-03 1985-04-05 Licentia Gmbh Switch operating mechanism for electric safety switch
DE9311791U1 (en) * 1993-08-07 1993-10-07 Heinrich Kopp Ag, 63796 Kahl Contact arrangement for protective switching devices

Also Published As

Publication number Publication date
ATE188310T1 (en) 2000-01-15
DK0720192T3 (en) 2000-06-19
DE4446411A1 (en) 1996-06-27
EP0720192B1 (en) 1999-12-29
ES2141871T3 (en) 2000-04-01
DE59507525D1 (en) 2000-02-03

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