EP1423862B1 - Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts - Google Patents

Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts Download PDF

Info

Publication number
EP1423862B1
EP1423862B1 EP02769933A EP02769933A EP1423862B1 EP 1423862 B1 EP1423862 B1 EP 1423862B1 EP 02769933 A EP02769933 A EP 02769933A EP 02769933 A EP02769933 A EP 02769933A EP 1423862 B1 EP1423862 B1 EP 1423862B1
Authority
EP
European Patent Office
Prior art keywords
stationary
switching contact
conductor piece
contact
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02769933A
Other languages
German (de)
French (fr)
Other versions
EP1423862A1 (en
Inventor
Michael Bach
Michael Hahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1423862A1 publication Critical patent/EP1423862A1/en
Application granted granted Critical
Publication of EP1423862B1 publication Critical patent/EP1423862B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the invention relates to a switching contact arrangement for a circuit breaker with a fixed conductor piece and a fixed switching contact mounted thereon and with a movable conductor piece and an attached, intended for surface contact on the fixed switching contact movable switch contact, wherein the fixed and the movable conductor piece with a closed switch contacts approximately rectangular stand to one another, further comprising means for amplifying a force acting between the switch contacts contact force by means of a transverse to the direction of the current in one of the conductor pieces introduced recess.
  • a switch contact arrangement of the type mentioned is characterized by the US 2,777,921 known.
  • it is particularly important to compensate for opposing forces, that is to say the contacts separating the switching contacts, as far as possible. These disturbing forces are dependent on the size of the current flowing through the switch contacts. In dull encountering switching contacts, as used in particular in low-voltage circuit breakers, these contact-lifting forces always occur because it is the physically unavoidable current forces.
  • unwanted opening of the switching contacts must not be allowed for selective circuit breakers, ie those that must conduct a short-circuit current during a specified time without disconnecting the switching contacts.
  • the invention is based on the above-described known switch contact arrangement, in which by means of a recess causes a deflection of the current and thereby a dependent on the current attraction between the interacting switch contacts is generated. It is based on the object to simplify the arrangement of the recess such that their preparation can be done with simple means and structural changes of the switching contact arrangement for receiving the recess are as small as possible.
  • this object is achieved in that the recess is mounted in the fixed conductor piece such that the direction of the current is aligned in a directly adjoining the fixed switching contact part of the fixed conductor piece approximately parallel to the direction of the current in the movable conductor piece.
  • the fixed switching contact is arranged on a partial surface of the movable switching contact facing end side of the fixed conductor piece and a further partial surface forms a fixed VorVEL founded, wherein the recess is disposed approximately parallel to the end near the fixed switch contact and extends from an edge surface of the conductor piece parallel to the precontact piece in the fixed conductor piece.
  • This configuration ensures that the current flowing through in normal switching contact arrangements, the fixed conductor piece continuously in the longitudinal direction of the current near its fixed contact bearing end face is deflected at right angles to the longitudinal direction of the conductor piece.
  • a portion of the current path in the fixed conductor piece extends approximately parallel to the current path in the movable conductor piece, resulting in an attractive force.
  • an increase in the thickness or the height of the fixed conductor piece opposite a previously common design is not required, but rather the fixed conductor piece in the usual dimensions is used.
  • This incision may be filled with an electrically non-conductive or low-conductive filling (filler or filler) in order to maintain the resistance of the fixed conductor piece against the forces occurring during switching as much as possible.
  • Another suitable way to form the recess is to introduce into the conductor piece closely adjacent parallel holes. Due to the local reduction of the conductor cross-section, the bores cause, similar to the continuous recess, a diversion of the current parallel to the end face of the conductor piece. However, the remaining between the holes webs ensure increased mechanical stability. However, in connection with these bores, an adequate strength can be provided for an approximately one solid conductor piece, in which the holes are filled with a filling of the type mentioned.
  • the figure shows in cross section a main flow path of an indicated low-voltage circuit breaker first
  • the Figures 2 shows in section a fixed conductor piece of a main flow path or a Heidelbergheftanordung at a recess is formed as a plurality of bores.
  • FIG. 3 shows the conductor piece according to the FIG. 2 canceled from below.
  • the circuit breaker 1 according to the FIG. 1 has a main current path with a switching contact arrangement 2, in which main and pre-contacts and arcing horns are provided in a known manner.
  • the switching contact arrangement 2 comprises an upper fixed conductor piece 3, which is designed as a connection rail of the circuit breaker 1 and is supported for this purpose in an opening in a rear wall 4 of the circuit breaker 1.
  • the conductor piece 3 may have a substantially rectangular cross-sectional shape, to which a lower edge surface 5 and an inner end face 6 belong.
  • a fixed switching contact 7 is attached, which is made in a known manner as a switching piece support made of a special contact material.
  • the remaining larger partial surface of the end face 6 forms a fixed Vortex Federation. 8
  • the movable part of the switching contact arrangement 2 is formed by an assembly composed of several components, to which in particular a contact carrier 10 and a movable about a pivot bearing 11 conductor piece 12 belong.
  • the contact carrier 10 is pivotally mounted at its lower end by means of a pivot pin 13 and can be moved by a lever assembly 14 for switching on and off of the switching contact arrangement 1 in a known manner by a switching shaft 15.
  • the movable conductor piece 12 has the known form of a contact lever, which at its upper end with a movable switching contact 16, a movable pre-contact 17th and an arcing horn 18 is provided.
  • Contact force springs 20 in the closed state of the switch contact arrangement 2 ensure an adequate contact force between the interacting switch contacts 7 and 16.
  • the movable arc horn 18 is confronted by an arc horn 21 fastened to the upper edge surface of the conductor piece 3.
  • the switching contact arrangement 2 may have a plurality of mutually parallel conductor pieces 12 in a common contact carrier 10 which cooperate with equally common conductor pieces 3 and 23 together.
  • the recess 24 extends from the lower edge surface 5 and extends parallel to the end face 6 and formed by this fixed Vortex Irish 8.
  • the recess 24 has the effect that a on the fixed switching contact 7 or exiting stream the Conductor piece 3 can not flow in a straight line in the longitudinal direction, but is caused by the recess 24 to a deflection, which leads near the end face 5 to a parallel to the end face 6 extending direction of the current.
  • the current in this part of the conductor piece 3 runs approximately parallel to the current in the movable conductor piece 12 (contact lever), which has an attractive effect.
  • the contact-removing stream forces are compensated in whole or in part.
  • filling material 25 may have the shape of a width of the recess 24 adapted strip of insulating material.
  • the recess 24 may be filled with a thermosetting resin composition, the mineral constituents are attached.
  • the filler or the filler are completely non-conductors.
  • the desired deflection of the current can be achieved, although not in such a perfect way as by a non-conductor.
  • the recess is formed by a plurality of adjacent holes 27, between which narrow webs 28 are present and which emanate from a lower edge surface 29.
  • the webs 28 between the recesses 27 (holes) act as an increased resistance and also cause the explained deflection of the current.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft eine Schaltkontaktanordnung für einen Leistungsschalter mit einem feststehenden Leiterstück und einem daran angebrachten feststehenden Schaltkontakt sowie mit einem bewegbaren Leiterstück und einem daran angebrachten, zur flächigen Anlage am feststehenden Schaltkontakt bestimmten bewegbaren Schaltkontakt, wobei das feststehende und das bewegbare Leiterstück bei geschlossenen Schaltkontakten etwa rechwinklig zueinander stehen, ferner mit einer Einrichtung zur Verstärkung einer zwischen den Schaltkontakten wirkenden Kontaktkraft mittels einer quer zur Richtung des Stromes in eines der Leiterstücke eingebrachten Ausnehmung.The invention relates to a switching contact arrangement for a circuit breaker with a fixed conductor piece and a fixed switching contact mounted thereon and with a movable conductor piece and an attached, intended for surface contact on the fixed switching contact movable switch contact, wherein the fixed and the movable conductor piece with a closed switch contacts approximately rectangular stand to one another, further comprising means for amplifying a force acting between the switch contacts contact force by means of a transverse to the direction of the current in one of the conductor pieces introduced recess.

Eine Schaltkontaktanordnung der genannten Art ist durch die US 2,777,921 bekannt geworden. Bei der erwähnten Einrichtung zur Erhöhung einer zwischen den Schaltkontakten wirkenden Kontaktkraft geht es insbesondere darum, entgegengesetzte, d. h. die Schaltkontakte voneinander trennende Kräfte möglichst zu kompensieren. Diese störenden Kräfte sind von der Größe des Stromes abhängig, der über die Schaltkontakte fließt. Bei stumpf aufeinandertreffenden Schaltkontakten, wie sie insbesondere in Niederspannungs-Leistungsschaltern eingesetzt werden, treten diese kontaktabhebenden Kräfte stets auf, weil es sich um die physikalisch nicht vermeidbaren Stromengekräfte handelt. Ein unerwünschte Öffnung der Schaltkontakte muss jedoch bei selektiven Leistungsschaltern, d.h. solchen, die einen Kurzschlussstrom während einer festgelegten Zeit ohne Trennung der Schaltkontakte führen müssen, nicht zulässig. Nach der erwähnten US 2,777,921 werden in die Schaltkontakte tragenden Leiterstücken Einschnitte derart angeordnet, dass zueinander parallele Strompfade gebildet werden, die aufeinander eine anziehende Wirkung ausüben, die den abhebenden Stromengekräften entgegengerichtet sind und diese ganz oder teilweise kompensieren. Offensichtlich stelle diese Einschnitte zwar ein wirksames Mittel zur Behebung des geschilderten Problems dar, führen jedoch zu einer Vergrößerung der Schaltkontaktanordnung und können deren mechanische Stabilität beeinträchtigen.A switch contact arrangement of the type mentioned is characterized by the US 2,777,921 known. In the mentioned device for increasing a contact force acting between the switching contacts, it is particularly important to compensate for opposing forces, that is to say the contacts separating the switching contacts, as far as possible. These disturbing forces are dependent on the size of the current flowing through the switch contacts. In dull encountering switching contacts, as used in particular in low-voltage circuit breakers, these contact-lifting forces always occur because it is the physically unavoidable current forces. However, unwanted opening of the switching contacts must not be allowed for selective circuit breakers, ie those that must conduct a short-circuit current during a specified time without disconnecting the switching contacts. After the mentioned US 2,777,921 be in the Switching contacts carrying conductor pieces incisions arranged such that mutually parallel current paths are formed, which exert on each other an attractive effect, which are opposite to the contrasting Stromengekräften and compensate them in whole or in part. Obviously, although these cuts provide an effective means of remedying the problem described above, they lead to an increase in the switching contact arrangement and can impair their mechanical stability.

Es ist ferner bekannt, in einem Schaltkontaktsystem die Kontaktkraft mittels einer ohnehin auftretenden Schleifenkraft zu vergrößern ( US 4,636,762 ). Hierzu wird ein biegsamer Leiter, der ohnehin zur Verbindung des bewegbaren Schaltkontaktes mit einem feststehenden Anschlussstück benötigt wird, an einer mit dem bewegbaren Schaltkontakt verbundenen Schlinge derart abgestützt, dass auf den an einem Kontaktträger schwenkbar angeordneten bewegbaren Schaltkontakt ein im Sinne des Schließens wirkendes Drehmoment übertragen wird. Diese sehr wirksame Anordnung erfordert jedoch zusätzliche Teile, welche die bewegte Masse des bewegbaren Teiles der Schaltkontaktanordnung nicht unwesentlich erhöhen und somit größere Öffnungskräfte für die Schaltvorgänge erfordern.It is also known to increase the contact force by means of an already occurring loop force in a switch contact system ( US 4,636,762 ). For this purpose, a flexible conductor, which is required in any case for connecting the movable switching contact with a fixed connection piece, supported on a connected to the movable switching contact loop such that a force acting in the sense of closing torque is transmitted to the pivotally mounted on a contact carrier movable switching contact , However, this very effective arrangement requires additional parts which not insignificantly increase the moving mass of the movable part of the switching contact arrangement and thus require larger opening forces for the switching operations.

Die Erfindung geht von der eingangs geschilderten bekannten Schaltkontaktanordnung aus, bei der mittels einer Ausnehmung eine Umlenkung des Stromes bewirkt und hierdurch eine vom Strom abhängige Anziehungskraft zwischen den zusammenwirkenden Schaltkontakten erzeugt wird. Ihr liegt die Aufgabe zugrunde, die Anordnung der Ausnehmung derart zu vereinfachen, dass ihre Herstellung mit einfachen Mitteln erfolgen kann und konstruktive Änderungen der Schaltkontaktanordnung zur Aufnahme der Ausnehmung so gering wie möglich sind.The invention is based on the above-described known switch contact arrangement, in which by means of a recess causes a deflection of the current and thereby a dependent on the current attraction between the interacting switch contacts is generated. It is based on the object to simplify the arrangement of the recess such that their preparation can be done with simple means and structural changes of the switching contact arrangement for receiving the recess are as small as possible.

Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, dass die Ausnehmung im feststehenden Leiterstück derart angebracht ist, dass die Richtung des Stromes in einem unmittelbar an dem feststehenden Schaltkontakt anschließenden Teil des feststehenden Leiterstückes etwa parallel zur Richtung des Stromes im bewegbaren Leiterstück ausgerichtet ist. Es erweist sich, dass diese einfache und mit geringen Kosten verbundenen Gestaltung der Schaltkontaktanordnung zu einer deutlichen Verringerung der stromabhängigen kontaktabhebenden Kräfte führt. Wesentlich ist hierbei, dass am gesamten bewegbaren Teil der Schaltkontaktanordnung keine Änderungen gegenüber einer üblichen Ausführung vorzunehmen sind.According to the invention, this object is achieved in that the recess is mounted in the fixed conductor piece such that the direction of the current is aligned in a directly adjoining the fixed switching contact part of the fixed conductor piece approximately parallel to the direction of the current in the movable conductor piece. It turns out that this simple and associated with low cost design of the switching contact arrangement leads to a significant reduction in the current-dependent contact-lifting forces. It is essential here that the entire movable part of the switching contact arrangement no changes compared to a conventional design are made.

Im Rahmen der Erfindung kann vorgesehen sein, dass der feststehende Schaltkontakt an einer Teilfläche einer dem bewegbaren Schaltkontakt zugewandten Stirnseite des feststehenden Leiterstückes angeordnet ist und eine weitere Teilfläche ein feststehendes Vorkontaktstück bildet, wobei die Ausnehmung nahe dem feststehenden Schaltkontakt etwa parallel zu der Stirnseite angeordnet ist und sich ausgehend von einer Randfläche des Leiterstückes parallel zum Vorkontaktstück in das feststehende Leiterstück erstreckt. Durch dies Gestaltung wird erreicht, dass der in üblichen Schaltkontaktanordnungen das feststehende Leiterstück durchgehend in dessen Längsrichtung durchfließende Strom nahe seiner den feststehenden Schaltkontakt tragenden Stirnseite rechtwinklig zu der Längsrichtung des Leiterstückes umgelenkt wird. Damit erstreckt sich ein Teil des Strompfades im feststehenden Leiterstück etwa parallel zu dem Strompfad im bewegbaren Leiterstück mit dem Ergebnis einer anziehenden Kraft. Es ist darauf hinzuweisen, dass zur Erzielung dieser Wirkung eine Vergrößerung der Dicke bzw. der Höhe des feststehenden Leiterstückes gegenüber einer bisher üblichen Ausführung nicht erforderlich ist, sondern vielmehr das feststehende Leiterstück in üblicher Dimensionierung verwendbar ist.In the context of the invention it can be provided that the fixed switching contact is arranged on a partial surface of the movable switching contact facing end side of the fixed conductor piece and a further partial surface forms a fixed Vorkontaktstück, wherein the recess is disposed approximately parallel to the end near the fixed switch contact and extends from an edge surface of the conductor piece parallel to the precontact piece in the fixed conductor piece. This configuration ensures that the current flowing through in normal switching contact arrangements, the fixed conductor piece continuously in the longitudinal direction of the current near its fixed contact bearing end face is deflected at right angles to the longitudinal direction of the conductor piece. Thus, a portion of the current path in the fixed conductor piece extends approximately parallel to the current path in the movable conductor piece, resulting in an attractive force. It should be noted that in order to achieve this effect, an increase in the thickness or the height of the fixed conductor piece opposite a previously common design is not required, but rather the fixed conductor piece in the usual dimensions is used.

Es erweist sich als zweckmäßig, die genante Ausnehmung durch einen Einschnitt mit parallelen Enden zu bilden. Dieser Einschnitt kann mit einem elektrisch nicht leitenden oder gering leitenden Füllung (Füllstück oder Füllmaterial) ausgefüllt sein, um die Beständigkeit des feststehenden Leiterstückes gegenüber den beim Schalten auftretenden Kräften möglichst aufrecht zu erhalten.It proves to be useful to form the genante recess through an incision with parallel ends. This incision may be filled with an electrically non-conductive or low-conductive filling (filler or filler) in order to maintain the resistance of the fixed conductor piece against the forces occurring during switching as much as possible.

Eine weitere geeignete Möglichkeit zur Bildung der Ausnehmung besteht darin, in das Leiterstück eng benachbarte parallele Bohrungen einzubringen. Aufgrund der örtlichen Verringerung des Leiterquerschnittes bewirken die Bohrungen ähnlich wie die durchgehende Ausnehmung eine Umleitung des Stromes parallel zur Stirnfläche des Leiterstückes. Die zwischen den Bohrungen verbleibenden Stege sorgen jedoch für eine erhöhte mechanische Stabilität. Jedoch kann auch in Verbindung mit diesen Bohrungen für eine annähernd einem massiven Leiterstück entsprechende Festigkeit gesorgt werden, in dem die Bohrungen mit einer Füllung der erwähnten Art ausgefüllt werden.Another suitable way to form the recess is to introduce into the conductor piece closely adjacent parallel holes. Due to the local reduction of the conductor cross-section, the bores cause, similar to the continuous recess, a diversion of the current parallel to the end face of the conductor piece. However, the remaining between the holes webs ensure increased mechanical stability. However, in connection with these bores, an adequate strength can be provided for an approximately one solid conductor piece, in which the holes are filled with a filling of the type mentioned.

Die Erfindung wird im Folgenden anhand der in den Figur gezeigten Ausführungsbeispiele näher erläutert.The invention will be explained in more detail below with reference to the embodiments shown in the figure.

Die Figur zeigt im Querschnitt eine Hauptstrombahn eines angedeuteten Niederspannungs-Leistungsschalters 1.The figure shows in cross section a main flow path of an indicated low-voltage circuit breaker first

Die Figuren 2 zeigt im Schnitt ein feststehendes Leiterstück einer Hauptstrombahn bzw. einer Schaltkontaktanordung, bei der eine Ausnehmung als Vielzahl von Bohrungen ausgebildet ist.The Figures 2 shows in section a fixed conductor piece of a main flow path or a Schaltkontaktanordung at a recess is formed as a plurality of bores.

Die Figur 3 zeigt das Leiterstück gemäß der Figur 2 abgebrochen von unten.The FIG. 3 shows the conductor piece according to the FIG. 2 canceled from below.

Der Leistungsschalter 1 gemäß der Figur 1 besitzt eine Hauptstrombahn mit einer Schaltkontaktanordnung 2, bei welcher in bekannter Weise Haupt- und Vorkontakte sowie Lichtbogenhörner vorgesehen sind. Die Schaltkontaktanordnung 2 umfasst ein oberes feststehendes Leiterstück 3, das als Anschlussschiene des Leistungsschalters 1 ausgebildet ist und hierzu in einer Öffnung einer Rückwand 4 des Leistungsschalters 1 abgestützt ist. In bekannter Weise kann das Leiterstück 3 eine im Wesentlichen rechteckige Querschnittsform aufweisen, zu der eine untere Randfläche 5 und eine inneren Stirnseite 6 gehören. An einer Teilfläche der Stirnseite 6 ist ein feststehender Schaltkontakt 7 angebracht, der in bekannter Weise als Schaltstückauflage aus einem speziellen Kontaktwerkstoff hergestellt ist. Die verbleibende größere Teilfläche der Stirnseite 6 bildet ein feststehendes Vorkontaktstück 8.The circuit breaker 1 according to the FIG. 1 has a main current path with a switching contact arrangement 2, in which main and pre-contacts and arcing horns are provided in a known manner. The switching contact arrangement 2 comprises an upper fixed conductor piece 3, which is designed as a connection rail of the circuit breaker 1 and is supported for this purpose in an opening in a rear wall 4 of the circuit breaker 1. In a known manner, the conductor piece 3 may have a substantially rectangular cross-sectional shape, to which a lower edge surface 5 and an inner end face 6 belong. On a partial surface of the end face 6, a fixed switching contact 7 is attached, which is made in a known manner as a switching piece support made of a special contact material. The remaining larger partial surface of the end face 6 forms a fixed Vorkontaktstück. 8

Der bewegliche Teil der Schaltkontaktanordnung 2 wird durch eine aus mehreren Bauteilen zusammengesetzte Baugruppe gebildet, zu der insbesondere ein Kontaktträger 10 und ein daran um ein Schwenklager 11 bewegbares Leiterstück 12 gehören. Der Kontaktträger 10 ist an seinem unteren Ende mittels eines Schwenkzapfens 13 schwenkbar gelagert und kann mittels einer Hebelanordnung 14 zum Ein- und Ausschalten der Schaltkontaktanordnung 1 in bekannter Weise durch eine Schaltwelle 15 bewegt werden. Das bewegbare Leiterstück 12 hat die bekannte Form eines Kontakthebels, der an seinem oberen Ende mit einem bewegbaren Schaltkontakt 16, einem bewegbaren Vorkontakt 17 und einem Lichtbogenhorn 18 versehen ist. Kontaktkraftfedern 20 sorgen im geschlossenem Zustand der Schaltkontaktanordnung 2 für eine angemessene Kontaktkraft zwischen den zusammenwirkenden Schaltkontakten 7 und 16. Dem bewegbaren Lichtbogenhorn 18 steht ein an der oberen Randfläche des Leiterstückes 3 befestigtes Lichtbogenhorn 21 gegenüber.The movable part of the switching contact arrangement 2 is formed by an assembly composed of several components, to which in particular a contact carrier 10 and a movable about a pivot bearing 11 conductor piece 12 belong. The contact carrier 10 is pivotally mounted at its lower end by means of a pivot pin 13 and can be moved by a lever assembly 14 for switching on and off of the switching contact arrangement 1 in a known manner by a switching shaft 15. The movable conductor piece 12 has the known form of a contact lever, which at its upper end with a movable switching contact 16, a movable pre-contact 17th and an arcing horn 18 is provided. Contact force springs 20 in the closed state of the switch contact arrangement 2 ensure an adequate contact force between the interacting switch contacts 7 and 16. The movable arc horn 18 is confronted by an arc horn 21 fastened to the upper edge surface of the conductor piece 3.

An einem über das Schwenklager 11 hinausragenden Endteil des Leiterstückes 12 sind biegsame Leiter 22 zur Verbindung des Leiterstückes mit einem unteren feststehenden Leiterstück 23 angebracht. Das Leiterstück 23 ist gleichfalls an der Rückwand 4 abgestützt und erstreckt sich parallel zu dem oberen feststehenden Leiterstück 3.At a projecting beyond the pivot bearing 11 end portion of the conductor piece 12 flexible conductor 22 for connecting the conductor piece with a lower stationary conductor piece 23 are attached. The conductor piece 23 is likewise supported on the rear wall 4 and extends parallel to the upper stationary conductor piece 3.

Entsprechend der vorgesehenen Belastbarkeit kann die Schaltkontaktanordnung 2 mehrere parallel zueinander angeordnete Leiterstücke 12 in einem gemeinsamen Kontaktträger 10 aufweisen, die mit gleichfalls gemeinsamen Leiterstücken 3 und 23 zusammen wirken.According to the intended load capacity, the switching contact arrangement 2 may have a plurality of mutually parallel conductor pieces 12 in a common contact carrier 10 which cooperate with equally common conductor pieces 3 and 23 together.

In der dargestellten eingeschalteten Position der Schaltkontaktanordnung 2 durchfließt ein Strom das oberer feststehende Leiterstück 3, die unter der Wirkung der Kontaktkraftfedern 20 anliegenden Schaltkontakte 7 und 16, das Leiterstück 12 bzw. die parallelen Leiterstücke 12 sowie die biegsamen Leiter 22 und das untere Leiterstück 23. Dabei treten zwischen den Schaltkontakten 7 und 16 die eingangs erläuterten Stromengekräfte auf, die der mittels der Kontaktkraftfedern 20 aufgebrachten Kontaktkraft entgegenwirken. Durch eine in dem feststehenden Leiterstück 3 angeordnete Ausnehmung 24 wird dafür gesorgt, dass die genannten kontaktabhebenden Kräfte wenigstens teilweise ausgeglichen werden. Hierzu ist die Ausnehmung 24 nahe der Stirnseite 6 des Leiterstückes 3 parallel zu der Stirnseite 6 angeordnet. Dabei ist es zweckmäßig, wenn sich die Ausnehmung 24 über die gesamte Breite des Leiterstückes 3 erstreckt.In the illustrated switched-on position of the switching contact arrangement 2, a current flows through the upper fixed conductor piece 3, the switching contacts 7 and 16 applied under the action of the contact force springs 20, the conductor piece 12 or the parallel conductor pieces 12 and the flexible conductors 22 and the lower conductor piece 23. In this case, between the switching contacts 7 and 16, the initially described Stromengekräfte counteract the applied by means of the contact force springs 20 contact force. By means of a recess 24 arranged in the fixed conductor piece 3, it is ensured that said contact-removing forces are at least partially compensated. For this purpose, the recess 24 is parallel to the end face 6 of the conductor piece 3 arranged to the front side 6. It is expedient if the recess 24 extends over the entire width of the conductor piece 3.

Wie man erkennt, geht die Ausnehmung 24 von der unteren Randfläche 5 aus und verläuft parallel zu der Stirnseite 6 und dem durch diese gebildeten feststehenden Vorkontaktstück 8. Die Ausnehmung 24 hat die Wirkung, dass ein am feststehenden Schaltkontakt 7 ein- bzw. austretender Strom das Leiterstück 3 nicht geradlinig in dessen Längsrichtung durchströmen kann, sondern durch die Ausnehmung 24 zu einer Umlenkung veranlasst wird, die nahe der Stirnseite 5 zu einer parallel zu der Stirnseite 6 verlaufenden Richtung des Stromes führt. Damit verläuft der Strom in diesem Teil des Leiterstückes 3 etwa parallel zu dem Strom im bewegbaren Leiterstück 12 (Kontakthebel), was eine anziehende Wirkung zur Folge hat. Damit werden die kontaktabhebenden Stromengekräfte ganz oder teilweise ausgeglichen.As can be seen, the recess 24 extends from the lower edge surface 5 and extends parallel to the end face 6 and formed by this fixed Vorkontaktstück 8. The recess 24 has the effect that a on the fixed switching contact 7 or exiting stream the Conductor piece 3 can not flow in a straight line in the longitudinal direction, but is caused by the recess 24 to a deflection, which leads near the end face 5 to a parallel to the end face 6 extending direction of the current. Thus, the current in this part of the conductor piece 3 runs approximately parallel to the current in the movable conductor piece 12 (contact lever), which has an attractive effect. Thus, the contact-removing stream forces are compensated in whole or in part.

Ein in der Figur angedeutetes Füllmaterial 25 kann die Gestalt eines der Breite der Ausnehmung 24 angepassten Streifens aus Isoliermaterial besitzen. Gleichfalls kann die Ausnehmung 24 mit einer aushärtenden Kunstharzmasse gefüllt sein, der mineralische Bestandteile beigefügt sind. Für die Wirksamkeit der Ausnehmung 24 ist es nicht erforderlich, dass der Füllstoff bzw. das Füllstück völlige Nichtleiter sind. Bereits durch ein Metall mit einem gegenüber dem Leiterstück 3 wesentlich geringeren elektrischen Leitwert kann die erwünschte Umlenkung des Stromes erreicht werden, wenn auch nicht in so vollkommender Weise wie durch einen Nichtleiter.An indicated in the figure filling material 25 may have the shape of a width of the recess 24 adapted strip of insulating material. Likewise, the recess 24 may be filled with a thermosetting resin composition, the mineral constituents are attached. For the effectiveness of the recess 24, it is not necessary that the filler or the filler are completely non-conductors. Already by a metal with a relation to the conductor piece 3 much lower electrical conductance, the desired deflection of the current can be achieved, although not in such a perfect way as by a non-conductor.

Das Gleiche gilt für den Fall, dass gemäß den Figuren 2 und 3 ein feststehendes Leiterstück 26 benutzt wird, dessen Ausnehmung durch eine Vielzahl benachbarter Bohrungen 27 gebildet ist, zwischen denen schmale Stege 28 vorhanden sind und die von einer unteren Randfläche 29 ausgehen. Die Stege 28 zwischen den Ausnehmungen 27 (Bohrungen) wirken wie ein erhöhter Widerstand und veranlassen gleichfalls die erläuterte Umlenkung des Stromes.The same applies to the case that according to the FIGS. 2 and 3 a fixed conductor piece 26 is used, the recess is formed by a plurality of adjacent holes 27, between which narrow webs 28 are present and which emanate from a lower edge surface 29. The webs 28 between the recesses 27 (holes) act as an increased resistance and also cause the explained deflection of the current.

Claims (5)

  1. Switching contact arrangement (2) for a circuit breaker
    (1) having a stationary conductor piece (3) and having a stationary switching contact (7), which is fitted to it, as well as having a moveable conductor piece (12) and a moveable switching contact (16) which is fitted to it and is intended to rest flat against the stationary switching contact (7), with the stationary and the moveable conductor pieces (3, 12) being approximately at right angles to one another when the switching contacts (7, 16) are closed, furthermore having a device for increasing the contact force acting between the switching contacts (7, 16), by means of a recess (24) which is incorporated in one of the conductor pieces transversely with respect to the direction of the current,
    characterized
    in that the recess (24; 27) is incorporated in the stationary conductor piece (3) such that the direction of the current in a part of the stationary conductor piece (3) which is immediately adjacent to the stationary switching contact (7) is aligned approximately parallel to the direction of the current in the moveable conductor piece (12).
  2. Switching contact arrangement according to Claim 1,
    characterized
    in that the stationary switching contact (7) is arranged on an area element of an end face (6) of the stationary conductor piece (3) facing the moveable switching contact (16), and a further area element forms a stationary initial contact piece (8), with the recess (24, 27) being arranged close to the stationary switching contact (7) and approximately parallel to the end face (6) and, starting from an edge surface (5) of the conductor piece (3), extending parallel to the initial contact piece (8) into the stationary conductor piece (3).
  3. Switching contact arrangement according to Claim 1 or 2,
    characterized
    in that the recess (24) is formed by an incision with parallel walls.
  4. Switching contact arrangement according to Claim 1 or 2,
    characterized
    in that the recess (27) is formed by closely adjacent parallel holes.
  5. Switching contact arrangement according to Claim 3 or 4,
    characterized
    in that the recess (24, 27) contains an electrically non-conductive or slightly conductive filling (25).
EP02769933A 2001-09-06 2002-09-03 Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts Expired - Lifetime EP1423862B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10144440A DE10144440C1 (en) 2001-09-06 2001-09-06 Switching contact arrangement with a device for amplifying a contact force acting between switching contacts
DE10144440 2001-09-06
PCT/DE2002/003327 WO2003023800A1 (en) 2001-09-06 2002-09-03 Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts

Publications (2)

Publication Number Publication Date
EP1423862A1 EP1423862A1 (en) 2004-06-02
EP1423862B1 true EP1423862B1 (en) 2008-11-19

Family

ID=7698439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02769933A Expired - Lifetime EP1423862B1 (en) 2001-09-06 2002-09-03 Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts

Country Status (4)

Country Link
US (1) US7202427B2 (en)
EP (1) EP1423862B1 (en)
DE (2) DE10144440C1 (en)
WO (1) WO2003023800A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10144440C1 (en) * 2001-09-06 2002-08-29 Siemens Ag Switching contact arrangement with a device for amplifying a contact force acting between switching contacts
DE10346361B3 (en) * 2003-09-30 2005-02-03 Siemens Ag Terminal rail device for electrical LV switch, has at least one terminal rail provided with localized reduction in its cross-section for compression of current lines
WO2012017282A1 (en) * 2010-07-31 2012-02-09 Larsen & Toubro Limited An improved contact arrangement for high fault current withstand in a low voltage switching device
JP6074720B2 (en) * 2013-06-11 2017-02-08 パナソニックＩｐマネジメント株式会社 Electromagnetic trip device and circuit breaker
US20160240329A1 (en) * 2015-02-17 2016-08-18 General Electric Company Circuit breaker including current path geometries that increase contact popping level
US10141125B2 (en) 2015-04-13 2018-11-27 Garrett Garcia Contact for bus plug switches
DE102019117802A1 (en) * 2019-07-02 2021-01-07 Johnson Electric Germany GmbH & Co. KG Switching contact system of a switching device operated by electrical current

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE398478C (en) 1922-11-07 1924-07-09 Bbc Brown Boveri & Cie Switch for large instantaneous currents
DE478488C (en) 1926-08-21 1929-06-29 Delle Atel Const Electr Set up on automatic off switches and similar devices with contact bridges
DE588293C (en) 1931-05-30 1933-11-20 Aeg Electrical switch or circuit breaker with block contacts for alternating current
FR1080198A (en) * 1953-06-16 1954-12-07 Merlin Gerin New electrical contact devices
CH470065A (en) 1966-11-16 1969-03-15 Licentia Gmbh Circuit breaker in which the contact is made by two parallel contact points
US3459914A (en) * 1967-09-27 1969-08-05 Peritus Enkoping Ab Contacts for the poles of electrical switchgear
DE3432086A1 (en) * 1984-08-28 1986-03-06 Siemens AG, 1000 Berlin und 8000 München CONTACT ARRANGEMENT WITH A CURRENT-DEPENDENT POWER FOR EXTENSING THE CONTACT FORCE
US4931602A (en) * 1987-05-28 1990-06-05 Mitsubishi Denki Kabushiki Kaisha Multipole circuit breaker
FR2781921B1 (en) * 1998-07-29 2000-09-15 Schneider Electric Ind Sa CIRCUIT BREAKER WITH ELECTRODYNAMIC HOLD AND HIGH BREAKING POWER
DE10144440C1 (en) 2001-09-06 2002-08-29 Siemens Ag Switching contact arrangement with a device for amplifying a contact force acting between switching contacts

Also Published As

Publication number Publication date
US7202427B2 (en) 2007-04-10
US20040239459A1 (en) 2004-12-02
WO2003023800A1 (en) 2003-03-20
DE50213032D1 (en) 2009-01-02
DE10144440C1 (en) 2002-08-29
EP1423862A1 (en) 2004-06-02

Similar Documents

Publication Publication Date Title
DE69016111T2 (en) Limit switch with an electromagnetic device to delay the relapse of the contact.
DE3411275C2 (en)
DE69302610T2 (en) Contact for load switch with cast housing
DE3528196C2 (en)
DE69515128T2 (en) CONNECTING TERMINAL ON BUSBARS FOR SWITCH SWITCHES OR MULTIPOLE DISCONNECTABLE SYSTEMS
DE3517659C2 (en) Circuit breaker
DE1563842B2 (en) SELF SWITCH
EP1423862B1 (en) Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts
DE102008049789B4 (en) Contact device with different contact forces in different operating conditions
EP1032942B1 (en) Switching device with an electric arc extinguishing device
EP2030211A1 (en) Power switch or power protective switch
EP0222684B1 (en) Contact arrangement for low-voltage circuit breakers with main contacts and arcing contacts
EP0916148B1 (en) Switching chamber housing for a power switch and housing modules for producing such a switching chamber housing
EP1218898B1 (en) Low-voltage power circuit breaker comprising a switching chamber and a displaceable contact unit
DE3334852A1 (en) Line protection circuit breaker having an arc starting aid
EP1360709B1 (en) Switching contact arrangement
DE102019117804B4 (en) Switching device with an electrical contact system
EP0360368B1 (en) Lever and abutting-contact arrangement for low-tension power switches with principal contacts and arcing contacts
DE19629867A1 (en) Current limiting electrical circuit-breaker switch
DE69030666T2 (en) OFF SWITCH
DE4000206A1 (en) Circuit breaker e.g. three-pole disconnecting switch - has movable contact slidably electrically connected to fixed contact
WO1998009307A1 (en) Mobile switching contact arrangement with contact force springs
EP0489986B1 (en) Low tension high power circuit breaker with an insulating connection means and an insulating shield
EP0375087B1 (en) Contact arrangement with a conductive pivot for a contact lever
EP1298684B1 (en) Contact arrengement for a low voltage switching device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030729

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50213032

Country of ref document: DE

Date of ref document: 20090102

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090820

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090910

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20091120

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20100928

Year of fee payment: 9

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100903

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50213032

Country of ref document: DE

Effective date: 20110401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100903

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20111005

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110903

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121001