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EP1615252B1 - Movable contact unit for contact arrangement in circuit breaker - Google Patents

Movable contact unit for contact arrangement in circuit breaker Download PDF

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Publication number
EP1615252B1
EP1615252B1 EP04405415A EP04405415A EP1615252B1 EP 1615252 B1 EP1615252 B1 EP 1615252B1 EP 04405415 A EP04405415 A EP 04405415A EP 04405415 A EP04405415 A EP 04405415A EP 1615252 B1 EP1615252 B1 EP 1615252B1
Authority
EP
European Patent Office
Prior art keywords
contact
mount
unit according
supported
circuit breaker
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
EP04405415A
Other languages
German (de)
French (fr)
Other versions
EP1615252A1 (en
Inventor
Thomas Busenhart
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to AT04405415T priority Critical patent/ATE407444T1/en
Priority to DE502004007985T priority patent/DE502004007985D1/en
Priority to EP04405415A priority patent/EP1615252B1/en
Priority to ES04405415T priority patent/ES2312946T3/en
Priority to US11/152,256 priority patent/US7132912B2/en
Publication of EP1615252A1 publication Critical patent/EP1615252A1/en
Application granted granted Critical
Publication of EP1615252B1 publication Critical patent/EP1615252B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526Manual 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221Contacts 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
    • H01H2001/223Contacts 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 using a torsion spring

Definitions

  • the present invention relates to the field of circuit breakers for low voltage distribution networks. It relates to a movable contact unit for a contact arrangement of a circuit breaker according to the preamble of claim 1 and a contact arrangement with such a contact unit and a circuit breaker with this contact arrangement.
  • circuit breakers designed as circuit-breakers are used for the rapid and reliable protection of low-voltage lines, motors, equipment and systems against the consequences of overload and short-circuit currents. They each usually have a thermal release with a bimetal and an electromagnetic release with a coil and a percussion anchor and cooperating with a quenching contact arrangement, which generally has one or two switching points.
  • the contact assembly includes one or two fixed contact pieces and a cooperating movable contact unit with a contact piece or with two integrated into a contact bridge generally contact pieces.
  • a movable contact unit of the aforementioned type is made US Pat. No. 6,492,607 B2 previously known.
  • the movable contact unit is part of a contact arrangement of a circuit breaker and has a contact carrier 2, two contact pieces 5, 6, a biased spring 11 with a release lever 10 and two each executed as a helical spring bending springs 7.8.
  • the contact carrier 2, the two contact pieces 5, 6 and the release lever 10 are mounted on an axle 18.
  • the two springs 7, 8 are each mounted on one of the two contact pieces 5, 6 and held with their bent ends on the contact carrier 2 and the associated contact piece 5, 6.
  • the biased release lever 10 Upon the occurrence of a short-circuit current, the biased release lever 10 is guided by a thermally or electromagnetically acting trigger counterclockwise against the biasing force of the spring 11. As a result, the latch is canceled and pivoted under the action of the prestressed bending springs 7, 8, the movable contact member in the counterclockwise direction. In this case, remove the contact pieces 5, 6 of the fixed contact pieces 9 and the switch is brought into the off state.
  • a movable contact unit of the contact arrangement of a circuit breaker is also in EP 0 616 350 A1 described.
  • This contact unit includes an elongated contact carrier, one end of which is pivotally mounted on a fixed axis held in the housing of the circuit breaker, and the other end formed as a contact and in the on state of the circuit breaker on a fixed contact piece of the contact arrangement is supported.
  • the contact carrier holds a lever pivotally mounted on the fixed axis and a two-armed lever whose pivot point is arranged approximately in the center of the contact carrier.
  • An impact surface arm of the two-armed lever cooperates with a firing pin of a thermally and magnetically acting trigger, whereas the other arm carries a latch hook.
  • the Verklinkungshaken and the latch lever form a generally referred to as a switch lock Verklinkungsstelle the circuit breaker.
  • the switch lock is closed when you turn on the circuit breaker by tilting a frictionally coupled via a transmission bracket with the ratchet lever lever is tilted while charging a spring accumulator in a preferred position.
  • the release triggers and opens the switch lock via the release pin.
  • the movable contact unit is rotated about the fixed axis and opened the contact arrangement of the circuit breaker.
  • the object is to provide a movable contact unit of the type mentioned, a contact arrangement with such a movable contact unit and a circuit breaker with this contact arrangement, which with a simple design and low maintenance requirements enable a high breaking capacity.
  • the pawl is pivotally mounted on the contact carrier
  • the bending spring is mounted on the pivot axis
  • the two contacts are part of a U-shaped contact bridge, the legs of which form the two contact pieces, and their base formed as a plate is and rests on a surface of the contact carrier.
  • a rapid assembly or disassembly of the movable contact unit according to the invention and a simple metering of the contact force is made possible by a spiral spring, which has a penetrated by the pivot axis cylindrical coil spring with two mutually rotatable legs, of which legs one on the contact carrier and the other under education the bias is supported on the contact piece.
  • a spiral spring can easily be attached to the pivot axis and fixed by bending both lever arms in a simple manner and under fixation of contact carrier, contact piece, pivot axis and release lever.
  • the two helical springs are frictionally coupled to one another by the U-shaped connecting section, so that the spring is fixed axially.
  • a groove on the contact carrier for holding one of the legs of the spiral spring can therefore be omitted.
  • a defined by the characteristic of the spiral spring and acting over a long way contact force is formed when the plate of the contact bridge rests on its side facing away from the contact pieces on a molded-in contact carrier projection.
  • a particularly good retention of the contact bridge is achieved if the base of the U designed as a plate has an opening into which a nose formed in the contact carrier protrudes. Through this opening also formed in the release lever arm can be performed, which is actuated by a trigger element of a preferably thermally or magnetically acting release unit.
  • Fig.1 is a part of a circuit breaker after removing a housing surrounding the switch shown.
  • This part of the circuit breaker includes a contact arrangement 1 with two series-connected switching points and two each one of the two switching points associated with arc quenching. Of the two switching points is in Fig.1 only one to recognize. This also applies to the two arc extinguishing devices, of which the recognizable is denoted by the reference numeral 2.
  • the recognizable switching point is formed by a movable contact piece 111 and a fixed contact piece 30 of the contact arrangement 1.
  • the arc quenching device 2 includes two arc runners 21, 22 and an extinguishing plate containing arc quenching chamber 23.
  • the not apparent second switching point and the unillustrated second arc quenching device are similarly formed and arranged substantially mirror-symmetrical to a plane lying in the plane of the dividing wall 24.
  • the movable contact piece 111 is part of a movable contact unit 10, which is pivotable about an axis 12 mounted in the switch housing. The further construction of the movable contact unit 10 will be described below with reference to FIGS. 2 to 5 explained.
  • the contact piece 111 is part of a contact bridge 11, which is designed in the manner of a U.
  • the two legs of the U are formed by the movable contact piece 111 and the corresponding contact piece 112 of Fig.1 not apparent second switching point.
  • the base of the U is designed as a plate 113 and has a quadrangular opening 114.
  • the plate 113 rests on a flat surface 131 of a contact carrier 13 made of insulating material.
  • a projection 132 is formed, on which the plate 113 abuts with its side facing away from the two movable contact pieces 111, 112 side.
  • In the opening 114 of the contact bridge 11 projects into the contact carrier 13 molded nose 133.
  • the contact carrier 13 carries at its support surface 131 opposite upper end arranged around an axis 134th pivotable pawl lever 135 to which a cooperating with a shift lever system not shown transfer bracket 4 is articulated.
  • the contact carrier 13 has two parallel guided and in the direction of the pivot axis 12 spaced from each other support arms 136 and 137 ( Figure 5 ) on. In non-designated openings of these support arms are the pivot axis 134 of the pawl 135 ( Figure 3 ) and also the pivot axis 12 (FIG. Figure 5 ) stored.
  • Out Figure 5 can be seen that in the intermediate space between the two support arms 136, 137 a pivot point of the two-armed executed release lever 14 holding nose 142 is arranged. In this nose a groove 143 is inserted, which serves to receive a torque-generating and the trigger lever 14 in the clockwise direction resetting spring 144.
  • the release lever 14 carries two plug-in parts 146, 147 (FIG. Figure 3 ) of two connecting elements to adjacent poles of the circuit breaker and a not apparent stop for an executed as a hook end of the pawl 135.
  • a left-pointing finger 145 of the trigger lever 14 and the right-pointing finger 141 (Fig. Figures 2 and 4 ) passing through the opening 114 (FIG. Figure 3 ) and an unspecified opening of the contact carrier 13 is guided, can be actuated by two differently arranged thermally activated triggers of the circuit breaker.
  • the trigger 14 can be acted upon by a magnetically activated trigger the circuit breaker with force. For this purpose, it has an impact surface 148 (FIG. Figure 4 ) on.
  • contact bridge 11 not only the individual components, such as contact carrier 13, trip lever 14, pivot axis 12 and contact bridge 11 are mechanically firmly connected to each other, but the contact bridge 11 and accordingly also the two movable contacts 111, 112 are now in the on state the switch with a defined by the characteristics of the springs 51 and 52 contact force supported on the fixed contact pieces. This can for the contact pieces 111 and 30 formed switching of the Fig.1 be removed.
  • the movable contact piece 111 is pressed with such a strong bias against the fixed contact piece 30 (and correspondingly the not visible movable contact piece 112 against another fixed contact piece), that abutting the projection 132 contact bridge 11 in the counterclockwise direction around the projection 132nd is pivoted and lifted from the support surface 131.
  • suitable dimensioning of the bending springs 51, 52 not only the desired contact force, but at the same time Griffinnachfederung can be achieved. Burning of the contact pieces and the associated loss of material can be compensated while maintaining a sufficiently sized contact force by tracking the movable contact pieces 111 and 112 and the contact bridge 11 by means of the bending springs 51, 52.
  • the torsion springs 51 and 52 each have a penetrated by the pivot axis 12 cylindrical coil spring 511 and 521 each having two mutually rotated legs 512, 513 and 521, 523.
  • the legs 513 and 523 are each in a in the contact carrier 13 molded groove 138 and 139 held, whereas in the legs 512 and 522 holding fingers 515 and 525 are formed, which respectively to form the bias voltage.
  • the contact force (in the ON state of the circuit breaker) on the contact bridge 11 and the two movable contact pieces 110 and 112 are supported.
  • a magnetic or thermal trigger of the circuit breaker is activated and a trigger member of one of the triggers will then strike either finger 141 or 145 or the impact surface 148.
  • the release lever 14 is now rotated in the counterclockwise direction against the force of the return spring 144 and this repealed a release of the release lever 14 and the pawl 135 formed.
  • the standing under the action of a non-illustrated loaded spring storage movable contact unit 10 is pivoted counterclockwise and the Contact arrangement 1 opened to form two series-connected switching arcs.
  • the circuit breaker can be turned on again. This is from a shift lever system, not shown on the off Fig. 2 4 transmission of force on the pawl 135 and the hinged thereto articulated, re-latched contact unit 10. Under charging of the spring accumulator and forming the predetermined contact force, the movable contact unit is clockwise in the on position according to Fig. 1 guided.
  • a simplification of the described embodiment of the movable contact unit 10 is achieved if only one bending spring is used instead of two bending springs.
  • This bending spring may be one of the two spiral springs 51 or 52.
  • the movable contact unit then has only one movable contact piece 111 or 112.
  • a bending spring is provided with two penetrated by the pivot axis, cylindrical coil springs and a two coiled springs frictionally coupling and supported on the contact carrier U-shaped connecting portion and two legs, which in each case connect one of the two coil springs and forming the bias on the contact bridge 11, respectively. support the contact pieces 111, 112.
  • Such designated by the reference numeral 53 spring is in Figure 3 partially dashed lines.
  • this spring contains the two springs 51 and 52, but additionally has a connecting portion shown in dashed lines, which complements with the two legs 512 and 522 to the U-shaped connecting portion 531.
  • the spring 53 may be formed from the two springs 51 and 52 also by connecting the two fingers 515 and 525 with a dotted center portion. The spring 53 then has a the two coil springs 511 and 521 frictionally coupling and supported on the contact bridge 11 U-shaped connecting portion 532. The two legs 513 and 523 are then supported in the grooves 138 and 139 of the Kunststoffanni13.

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

Abstract

A tripping lever is arranged on a pivoting shaft (12) which can be mounted in the circuit breaker, alongside a contact mount. The contact pieces (30,111) arranged on the contact mount, are held by the prestressed bending springs which is mounted on the pivoting shaft. Independent claims are also included for the following: (1) contact arrangement; and (2) circuit breaker.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die vorliegende Erfindung bezieht sich auf das Gebiet der Schutzschalter für Niederspannungsverteilnetze. Sie betrifft eine bewegliche Kontakteinheit für eine Kontaktanordnung eines Schutzschalters nach dem Oberbegriff von Patentanspruch 1 sowie eine Kontaktanordnung mit einer solchen Kontakteinheit und einen Schutzschalter mit dieser Kontaktanordnung.The present invention relates to the field of circuit breakers for low voltage distribution networks. It relates to a movable contact unit for a contact arrangement of a circuit breaker according to the preamble of claim 1 and a contact arrangement with such a contact unit and a circuit breaker with this contact arrangement.

In Niederspannungsverteilnetzen dienen als Installationseinbauschalter ausgeführte Schutzschalter dem raschen und zuverlässigen Schutz von unter Niederspannung stehenden Leitungen, Motoren, Apparaten und Anlagen vor den Folgen von Überlast und Kurzschlussströmen. Sie weisen jeweils zumeist einen thermischen Auslöser mit einem Bimetall und einen elektromagnetischen Auslöser mit einer Spule und einem Schlaganker auf und eine mit einer Löscheinrichtung zusammenwirkende Kontaktanordnung, welche im allgemeinen eine oder zwei Schaltstellen aufweist. Je nach Ausbildung mit einer oder zwei Schaltstellen enthält die Kontaktanordnung ein oder zwei feststehende Kontaktstücke sowie eine damit zusammenarbeitende bewegliche Kontakteinheit mit einem Kontaktstück oder mit zwei im allgemeinen in eine Kontaktbrücke integrierten Kontaktstücken.In low-voltage distribution networks, circuit breakers designed as circuit-breakers are used for the rapid and reliable protection of low-voltage lines, motors, equipment and systems against the consequences of overload and short-circuit currents. They each usually have a thermal release with a bimetal and an electromagnetic release with a coil and a percussion anchor and cooperating with a quenching contact arrangement, which generally has one or two switching points. Depending on the training with one or two switching points, the contact assembly includes one or two fixed contact pieces and a cooperating movable contact unit with a contact piece or with two integrated into a contact bridge generally contact pieces.

STAND DER TECHNIKSTATE OF THE ART

Eine bewegliche Kontakteinheit der vorgenannten Art ist aus US 6,492,607 B2 vorbekannt. Die bewegliche Kontakteinheit ist Teil einer Kontaktanordnung eines Leitungsschutzschalters und weist einen Kontaktträger 2, zwei Kontaktstücke 5, 6, einen mit einer Feder 11 vorgespannten Auslösehebel 10 und zwei jeweils als Schraubenfeder ausgeführte Biegefedern 7.8 auf. Der Kontaktträger 2, die beiden Kontaktstücke 5, 6 und der Auslösehebel 10 sind auf einer Achse 18 gelagert. Die beiden Federn 7, 8 sind jeweils an einem beider Kontaktstücke 5, 6 gelagert und mit ihren aufgebogenen Enden am Kontaktträger 2 und am zugeordneten Kontaktstück 5, 6 gehalten.A movable contact unit of the aforementioned type is made US Pat. No. 6,492,607 B2 previously known. The movable contact unit is part of a contact arrangement of a circuit breaker and has a contact carrier 2, two contact pieces 5, 6, a biased spring 11 with a release lever 10 and two each executed as a helical spring bending springs 7.8. The contact carrier 2, the two contact pieces 5, 6 and the release lever 10 are mounted on an axle 18. The two springs 7, 8 are each mounted on one of the two contact pieces 5, 6 and held with their bent ends on the contact carrier 2 and the associated contact piece 5, 6.

Im Einschaltzustand des Schalters sind die beiden Kontaktstücke 5, 6 auf feststehenden Kontaktstücken 9 abgestützt. Kontaktkraft wird durch die vorgespannten Biegefedern 7, 8 erzeugt. Der durch die Feder 11 vorgespannte Auslösehebel 10 verklinkt hierbei einen in einer Kulisse des Kontaktträgers 2 geführten Spannbügel 3 eines Schalterantriebs. Der Schalterantrieb ist über einen Hebel 20 manuell betätigbar und weist eine Nockenscheibe 12 auf, die bei Betätigung des Hebels 20 ein Verdrehen des Auslösehebels 12 und damit ein Öffnen oder Schliessen der Verklinkung resp. der Kontaktanordnung bewirkt.When the switch is switched on, the two contact pieces 5, 6 are supported on stationary contact pieces 9. Contact force is generated by the prestressed bending springs 7, 8. The preloaded by the spring 11 trip lever 10 verklinkt here a guided in a backdrop of the contact carrier 2 clamping bracket 3 a switch drive. The switch drive is manually actuated by a lever 20 and has a cam 12, which upon actuation of the lever 20, a rotation of the trigger lever 12 and thus an opening or closing of the latch resp. causes the contact arrangement.

Beim Auftreten eines Kurzschlussstroms wird der vorgespannte Auslösehebel 10 durch einen thermisch oder elektromagnetisch wirkenden Auslöser im Gegenuhrzeigersinn entgegen der Vorspannkraft der Feder 11 geführt. Hierdurch wird die Verklinkung aufgehoben und unter der Wirkung der vorgespannten Biegefedern 7, 8 das bewegliche Kontaktteil im Gegenuhrzeigersinn geschwenkt. Hierbei entfernen sich die Kontaktstücke 5, 6 von den feststehenden Kontaktstücken 9 und wird der Schalter in den Ausschaltzustand gebracht.Upon the occurrence of a short-circuit current, the biased release lever 10 is guided by a thermally or electromagnetically acting trigger counterclockwise against the biasing force of the spring 11. As a result, the latch is canceled and pivoted under the action of the prestressed bending springs 7, 8, the movable contact member in the counterclockwise direction. In this case, remove the contact pieces 5, 6 of the fixed contact pieces 9 and the switch is brought into the off state.

Eine bewegliche Kontakteinheit der Kontaktanordnung eines Schutzschalters ist auch in EP 0 616 350 A1 beschrieben. Diese Kontakteinheit enthält einen gestreckt ausgebildeten Kontaktträger, dessen eines Ende an einer im Gehäuse des Schutzschalters gehaltenen feststehenden Achse schwenkbar gelagert ist, und dessen anderes Ende als Kontaktstück ausgebildet und im Einschaltzustand des Schutzschalters auf einem feststehenden Kontaktstück der Kontaktanordnung abgestützt ist. Der Kontaktträger hält einen an der feststehenden Achse schwenkbar gelagerten Klinkenhebel sowie einen zweiarmigen Hebel, dessen Drehpunkt etwa in der Mitte des Kontaktträgers angeordnet ist. Ein mit einer Aufschlagfläche versehener Arm des zweiarmigen Hebels wirkt mit einem Auslösestift eines thermisch und magnetisch wirkenden Auslöser zusammen, wohingegen der anderer Arm einen Verklinkungshaken trägt. Der Verklinkungshaken und der Klinkenhebel bilden eine im allgemeinen als Schaltschloss bezeichnete Verklinkungsstelle des Schutzschalters. Das Schaltschloss wird beim Einschalten des Schutzschalters geschlossen, indem ein über einen Übertragungsbügel mit dem Klinkenhebel kraftschlüssig gekoppelter Schalthebel unter gleichzeitigem Aufladen eines Federspeichers in eine Vorzugslage gekippt wird. Beim Auftreten eines Kurzschluss- oder Überstroms löst der Auslöser aus und öffnet über den Auslösestift das Schaltschloss. Durch den sich nun entladenden Federspeicher wird die bewegliche Kontakteinheit um die feststehende Achse verdreht und die Kontaktanordnung des Schutzschalters geöffnet.A movable contact unit of the contact arrangement of a circuit breaker is also in EP 0 616 350 A1 described. This contact unit includes an elongated contact carrier, one end of which is pivotally mounted on a fixed axis held in the housing of the circuit breaker, and the other end formed as a contact and in the on state of the circuit breaker on a fixed contact piece of the contact arrangement is supported. The contact carrier holds a lever pivotally mounted on the fixed axis and a two-armed lever whose pivot point is arranged approximately in the center of the contact carrier. An impact surface arm of the two-armed lever cooperates with a firing pin of a thermally and magnetically acting trigger, whereas the other arm carries a latch hook. The Verklinkungshaken and the latch lever form a generally referred to as a switch lock Verklinkungsstelle the circuit breaker. The switch lock is closed when you turn on the circuit breaker by tilting a frictionally coupled via a transmission bracket with the ratchet lever lever is tilted while charging a spring accumulator in a preferred position. When a short-circuit or overcurrent occurs, the release triggers and opens the switch lock via the release pin. By now discharging the spring accumulator, the movable contact unit is rotated about the fixed axis and opened the contact arrangement of the circuit breaker.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Der Erfindung, wie sie in den Patentansprüchen angegeben ist, liegt die Aufgabe zugrunde, eine bewegliche Kontakteinheit der eingangs genannten Art, eine Kontaktanordnung mit einer solchen beweglichen Kontakteinheit und einen Schutzschalter mit dieser Kontaktanordnung zu schaffen, welche bei einfacher Bauweise und geringen Anforderungen an die Wartung eine hohe Ausschaltleistung ermöglichen.The invention, as indicated in the claims, the object is to provide a movable contact unit of the type mentioned, a contact arrangement with such a movable contact unit and a circuit breaker with this contact arrangement, which with a simple design and low maintenance requirements enable a high breaking capacity.

Bei der beweglichen Kontakteinheit nach der Erfindung ist die Klinke schwenkbar am Kontaktträger gelagert, ist die Biegefeder auf der Schwenkachse gelagert, und sind die beiden Kontaktstücke Teil einer nach Art eines U ausgeführten Kontaktbrücke, deren Schenkel die beiden Kontaktstücke bilden, und deren Basis als Platte ausgebildet ist und auf einer Fläche des Kontaktträgers aufliegt. Diese Massnahmen ermöglichen in vorteilhafter Weise eine einfache Montage der Kontakteinheit durch Aufstecken des Kontaktträgers, des Auslösehebels und einer Auslösefeder auf die Schwenkachse und durch nachfolgendes Fixieren dieser Komponenten und der Kontaktbrücke durch die ebenfalls auf der Schwenkachse gelagerte Biegefeder. Hierbei ist es besonders vorteilhaft, dass die Biegefeder nicht nur die verschiedenen Komponenten des beweglichen Kontaktteils festsetzt, sondern zugleich auch die Kontaktkraft der Kontaktbrücke definiert. Dadurch, dass die Kontaktbrücke lediglich auf dem Kontaktträger und nicht auf der Schwenkachse aufliegt, kann diese leicht ausgewechselt und durch eine gegebenenfalls anders bemessene Kontaktbrücke ersetzt werden.In the movable contact unit according to the invention, the pawl is pivotally mounted on the contact carrier, the bending spring is mounted on the pivot axis, and the two contacts are part of a U-shaped contact bridge, the legs of which form the two contact pieces, and their base formed as a plate is and rests on a surface of the contact carrier. These measures advantageously allow a simple assembly of the contact unit by attaching the contact carrier, the release lever and a Release spring on the pivot axis and by subsequent fixing of these components and the contact bridge by the also mounted on the pivot axis bending spring. It is particularly advantageous that the bending spring not only sets the various components of the movable contact part, but also defines the contact force of the contact bridge at the same time. The fact that the contact bridge rests only on the contact carrier and not on the pivot axis, this can be easily replaced and replaced by a possibly differently sized contact bridge.

Eine rasche Montage oder Demontage der beweglichen Kontakteinheit nach der Erfindung und eine einfache Dosierung der Kontaktkraft wird durch eine Biegefeder ermöglicht, welche eine von der Schwenkachse durchdrungene zylindrische Schraubenfeder mit zwei gegeneinander verdrehbaren Schenkeln aufweist, von welchen Schenkeln einer auf dem Kontaktträger und der andere unter Bildung der Vorspannung auf dem Kontaktstück abgestützt ist. Eine solche Biegefeder kann leicht auch die Schwenkachse aufgesteckt und durch Aufbiegen beider Hebelarme in einfacher Weise und unter Fixierung von Kontaktträger, Kontaktstück, Schwenkachse und Auslösehebel festgesetzt werden. Durch Einformen eines das Kontaktstück hintergreifenden Haltefingers in den auf dem beweglichen Kontaktstück abgestützten Schenkel wird das Kontaktstück mit einfachen Mitteln gehalten, wohingegen der zweite Schenkel mit Vorteil in einer in den Kontaktträger eingeformten Nut gehalten ist.A rapid assembly or disassembly of the movable contact unit according to the invention and a simple metering of the contact force is made possible by a spiral spring, which has a penetrated by the pivot axis cylindrical coil spring with two mutually rotatable legs, of which legs one on the contact carrier and the other under education the bias is supported on the contact piece. Such a spiral spring can easily be attached to the pivot axis and fixed by bending both lever arms in a simple manner and under fixation of contact carrier, contact piece, pivot axis and release lever. By molding a contact finger engaging behind the retaining finger in the supported on the movable contact leg, the contact piece is held by simple means, whereas the second leg is held with advantage in a molded-in contact carrier groove.

Eine besonders stabile bewegbare Kontakteinheit wird erreicht, wenn zwei spiegelsymmetrisch auf der Achse angeordnete Biegefedern vorgesehen sind, oder wenn die Biegefeder als Doppeltorsionsfeder ausgebildet ist und folgende Bestandteile aufweist:

  • zwei jeweils von der Schwenkachse durchdrungene, zylindrische Schraubenfedern,
  • einen die beiden Schraubenfedern kraftschlüssig koppelnden und auf dem Kontaktträger abgestützten U-förmigen Verbindungsabschnitt, und
  • zwei Schenkel, welche sich jeweils an je eine beider Schraubenfedern anschliessen und unter Bildung der Vorspannung auf dem Kontaktstück abgestützt sind.
A particularly stable movable contact unit is achieved if two mirror-symmetrically arranged on the axis bending springs are provided, or if the bending spring is formed as a double torsion spring and having the following components:
  • two cylindrical helical springs each penetrated by the pivot axis,
  • a force-locking coupling the two coil springs and supported on the contact carrier U-shaped connecting portion, and
  • two legs, which in each case connect to each one of the two coil springs and are supported to form the bias on the contact piece.

Bei der Doppeltorsionsfeder werden die beiden Schraubenfedern durch den U-förmigen Verbindungsabschnitt kraftschlüssig miteinander gekoppelt und so die Feder axial fixiert. Eine Nut am Kontaktträger zum Halten eines der Schenkel der Biegefeder kann daher entfallen.In the case of the double torsion spring, the two helical springs are frictionally coupled to one another by the U-shaped connecting section, so that the spring is fixed axially. A groove on the contact carrier for holding one of the legs of the spiral spring can therefore be omitted.

Eine durch die Kennlinie der Biegefeder definierte und über einen grossen Weg wirkende Kontaktkraft wird gebildet, wenn die Platte der Kontaktbrücke an ihrer von den Kontaktstücken abgewandten Seite an einem in den Kontaktträger eingeformten Vorsprung anliegt.A defined by the characteristic of the spiral spring and acting over a long way contact force is formed when the plate of the contact bridge rests on its side facing away from the contact pieces on a molded-in contact carrier projection.

Beim Schliessen der Kontaktanordnung schlagen dann nämlich die beiden Kontaktstücke der Kontaktbrücke gegen zwei feststehende Kontaktstücke der Kontaktanordnung und werden anschliessend gegen die Wirkung der Biegefeder um eine vom Vorsprung gebildete Achse verschwenkt. Hierbei wird über einen vergleichsweise grossen Weg eine definierte Kontaktkraft erzeugt. Nicht zu vermeidender Kontaktabbrand kann so gut kompensiert werden.When closing the contact arrangement then hit namely the two contact pieces of the contact bridge against two fixed contact pieces of the contact arrangement and are then pivoted against the action of the bending spring about an axis formed by the projection. Here, a defined contact force is generated over a comparatively long way. Unavoidable contact erosion can be compensated so well.

Eine besonders gute Halterung der Kontaktbrücke wird erreicht, wenn die als Platte ausgeführte Basis des U eine Öffnung aufweist, in die eine in den Kontaktträger eingeformte Nase ragt. Durch diese Öffnung kann auch ein in den Auslösehebel eingeformter Arm geführt sein, welcher von einem Auslöseelement einer vorzugsweise thermisch oder magnetisch wirkenden Auslöseeinheit betätigbar ist.A particularly good retention of the contact bridge is achieved if the base of the U designed as a plate has an opening into which a nose formed in the contact carrier protrudes. Through this opening also formed in the release lever arm can be performed, which is actuated by a trigger element of a preferably thermally or magnetically acting release unit.

KURZE BESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Anhand von Zeichnungen wird nachfolgend ein Ausführungsbeispiel der Erfindung näher erläutert. Hierbei zeigt:

Fig.1
eine in Richtung einer Schwenkachse geführte Ansicht eines Teils eines Schutzschalters im Einschaltzustand mit einer eine bewegliche Kontakteinheit nach der Erfindung enthaltenden Kontakteinrichtung und mit einer Lichtbogenlöscheinrichtung,
Fig.2
eine perspektivische Ansicht der Kontakteinheit gemäss Fig.1 im Ausschaltzustand des Schutzschalters, bei der in die Kontakteinheit nun auch ein Klinkenhebel der Kontakteinheit und ein am Klinkenhebel angelenkter Übertragungsbügel zu einem nicht dargestellten Schaltgetriebe eingezeichnet sind,
Fig.3
eine quer zur Schwenkachse geführte Ansicht der Kontakteinheit gemäss Fig.2,
Fig.4
eine in Richtung der Schwenkachse geführte Ansicht der Kontakteinheit gemäss Fig.2, und
Fig.5
eine Aufsicht in Pfeilrichtung auf einen längs V - V geführten Schnitt durch die Kontakteinheit nach Fig.4.
With reference to drawings, an embodiment of the invention will be explained in more detail below. Hereby shows:
Fig.1
a guided in the direction of a pivot axis view of a part of a circuit breaker in the on state with a contact unit containing a movable contact unit according to the invention and with an arc quenching device,
Fig.2
a perspective view of the contact unit according to Fig.1 in the off state of the circuit breaker, in which in the contact unit now also a latch lever of the contact unit and a hinged to the latch lever transmission bracket are shown to a manual transmission, not shown,
Figure 3
a guided transversely to the pivot axis view of the contact unit according to Fig.2 .
Figure 4
a guided in the direction of the pivot axis view of the contact unit according to Fig.2 , and
Figure 5
a view in the direction of arrow on a longitudinal V - V guided section through the contact unit according to Figure 4 ,

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In allen Figuren beziehen sich gleiche Bezugszeichen auf gleichwirkende Teile. In Fig.1 ist ein Teil eines Schutzschalters nach Entfernen eines den Schalter umgebenden Gehäuses dargestellt. Dieser Teil des Schutzschalters enthält eine Kontaktanordnung 1 mit zwei in Serie geschalteten Schaltstellen und zwei jeweils einer der beiden Schaltstellen zugeordneten Lichtbogenlöscheinrichtungen. Von den beiden Schaltstellen ist in Fig.1 nur eine zu erkennen. Dies gilt auch für die beiden Lichtbogenlöscheinrichtungen, von denen die erkennbare mit dem Bezugszeichen 2 bezeichnet ist. Die erkennbare Schaltstelle ist von einem beweglichen Kontaktstück 111 und einem feststehenden Kontaktstück 30 der Kontaktanordnung 1 gebildet. Die Lichtbogenlöscheinrichtung 2 enthält zwei Lichtbogenlaufschienen 21, 22 und eine Löschbleche enthaltende Lichtbogenlöschkammer 23. Die nicht ersichtliche zweite Schaltstelle und die nicht ersichtliche zweite Lichtbogenlöscheinrichtung sind ähnlich ausgebildet und im wesentlichen spiegelsymmetrisch zu einer in der Zeichnungsebene liegenden Trennwand 24 angeordnet. Das bewegliche Kontaktstück 111 ist Teil einer beweglichen Kontakteinheit 10, welche um eine im Schaltergehäuse gelagerte Achse 12 schwenkbar ist. Der weitere Aufbau der beweglichen Kontakteinheit 10 wird nachfolgend anhand der Figuren 2 bis 5 erläutert.In all figures, like reference numerals refer to like-acting parts. In Fig.1 is a part of a circuit breaker after removing a housing surrounding the switch shown. This part of the circuit breaker includes a contact arrangement 1 with two series-connected switching points and two each one of the two switching points associated with arc quenching. Of the two switching points is in Fig.1 only one to recognize. This also applies to the two arc extinguishing devices, of which the recognizable is denoted by the reference numeral 2. The recognizable switching point is formed by a movable contact piece 111 and a fixed contact piece 30 of the contact arrangement 1. The arc quenching device 2 includes two arc runners 21, 22 and an extinguishing plate containing arc quenching chamber 23. The not apparent second switching point and the unillustrated second arc quenching device are similarly formed and arranged substantially mirror-symmetrical to a plane lying in the plane of the dividing wall 24. The movable contact piece 111 is part of a movable contact unit 10, which is pivotable about an axis 12 mounted in the switch housing. The further construction of the movable contact unit 10 will be described below with reference to FIG FIGS. 2 to 5 explained.

Ersichtlich ist das Kontaktstück 111 Teil einer Kontaktbrücke 11, welche nach Art eines U ausgebildet ist. Die beiden Schenkel des U sind gebildet vom beweglichen Kontaktstück 111 und dem entsprechenden Kontaktstück 112 der aus Fig.1 nicht ersichtlichen zweiten Schaltstelle. Die Basis des U ist als Platte 113 ausgeführt und weist eine viereckige Öffnung 114 auf. Die Platte 113 liegt auf einer ebenen Fläche 131 eines Kontaktträgers 13 aus Isolierstoff auf. In den Kontaktträger 13 ist ein Vorsprung 132 eingeformt, an dem die Platte 113 mit ihrer von den beiden bewegliche Kontaktstücken 111, 112 abgewandten Seite anschlägt. In die Öffnung 114 der Kontaktbrücke 11 ragt eine in den Kontaktträger 13 eingeformte Nase 133. Durch die Öffnung 114 ist ein in einen Auslösehebel 14 eingeformter Finger 141 geführt. Der Kontaktträger 13 trägt an seinem der Auflagefläche131 entgegengesetzt angeordneten oberen Ende einen um eine Achse 134 schwenkbaren Klinkenhebel 135, an den ein mit einem nicht dargestellten Schalthebelsystem zusammenwirkender Übertragungsbügel 4 angelenkt ist.It can be seen that the contact piece 111 is part of a contact bridge 11, which is designed in the manner of a U. The two legs of the U are formed by the movable contact piece 111 and the corresponding contact piece 112 of Fig.1 not apparent second switching point. The base of the U is designed as a plate 113 and has a quadrangular opening 114. The plate 113 rests on a flat surface 131 of a contact carrier 13 made of insulating material. In the contact carrier 13, a projection 132 is formed, on which the plate 113 abuts with its side facing away from the two movable contact pieces 111, 112 side. In the opening 114 of the contact bridge 11 projects into the contact carrier 13 molded nose 133. Through the opening 114 a formed in a release lever 14 finger 141 is guided. The contact carrier 13 carries at its support surface 131 opposite upper end arranged around an axis 134th pivotable pawl lever 135 to which a cooperating with a shift lever system not shown transfer bracket 4 is articulated.

Wie aus den Figuren 3 bis 5 ersichtlich ist, weist der Kontaktträger 13 zwei parallel geführte und in Richtung der Schwenkachse 12 voneinander mit Abstand angeordnete Tragarme 136 und 137 (Fig.5) auf. In nicht bezeichneten Öffnungen dieser Tragarme sind die Schwenkachse 134 der Klinke 135 (Fig.3) und auch die Schwenkachse 12 (Fig.5) gelagert. Aus Fig.5 kann entnommen werden, dass im Zwischenraum zwischen den beiden Tragarmen 136, 137 eine den Drehpunkt des zweiarmig ausgeführten Auslösehebels 14 haltende Nase 142 angeordnet ist. In diese Nase ist eine Nut 143 eingelassen, die der Aufnahme einer drehmomenterzeugenden und den Auslösehebel 14 im Uhrzeigersinn rückstellenden Feder 144 dient. Der Auslösehebel 14 trägt zwei Steckteile 146, 147 (Fig.3) zweier Verbindungselemente zu benachbarten Polen des Schutzschalters sowie einen nicht ersichtlichen Anschlag für ein als Haken ausgeführtes Ende der Klinke 135. Ein nach links weisender Finger 145 des Auslösehebels 14 und der nach rechts weisende Finger 141 (Figuren 2 und 4), der durch die Öffnung 114 (Fig.3) sowie eine nicht bezeichnete Öffnung des Kontaktträgers 13 geführt wird, können von zwei unterschiedlich angeordneten thermisch aktivierbaren Auslösern des Schutzschalters betätigt werden. Ebenso kann der Auslöser 14 von einem magnetisch aktivierbaren Auslöser des Schutzschalters mit Kraft beaufschlagt werden. Zu diesem Zweck weist er eine Aufschlagfläche 148 (Fig.4) auf.Like from the FIGS. 3 to 5 can be seen, the contact carrier 13 has two parallel guided and in the direction of the pivot axis 12 spaced from each other support arms 136 and 137 ( Figure 5 ) on. In non-designated openings of these support arms are the pivot axis 134 of the pawl 135 ( Figure 3 ) and also the pivot axis 12 (FIG. Figure 5 ) stored. Out Figure 5 can be seen that in the intermediate space between the two support arms 136, 137 a pivot point of the two-armed executed release lever 14 holding nose 142 is arranged. In this nose a groove 143 is inserted, which serves to receive a torque-generating and the trigger lever 14 in the clockwise direction resetting spring 144. The release lever 14 carries two plug-in parts 146, 147 (FIG. Figure 3 ) of two connecting elements to adjacent poles of the circuit breaker and a not apparent stop for an executed as a hook end of the pawl 135. A left-pointing finger 145 of the trigger lever 14 and the right-pointing finger 141 (Fig. Figures 2 and 4 ) passing through the opening 114 (FIG. Figure 3 ) and an unspecified opening of the contact carrier 13 is guided, can be actuated by two differently arranged thermally activated triggers of the circuit breaker. Likewise, the trigger 14 can be acted upon by a magnetically activated trigger the circuit breaker with force. For this purpose, it has an impact surface 148 (FIG. Figure 4 ) on.

Bei der Montage der beweglichen Kontakteinheit 10 werden der Kontaktträger 14 und der die Rückstellfeder 144 in der Nut 143 haltende Auslösehebel 14 derart zusammengesteckt, dass die Schwenkachse 12 entsprechend Fig.5 durch diese drei Teile geführt werden kann. Nach Auflegen der Kontaktbrücke 11 auf die Auflagefläche 131 des Kontaktträgers 13 werden diese fünf Komponenten mit zwei aus den Figuren 3 und 5 ersichtlichen, auf der Schwenkachse 12 gelagerten Biegefedern 51 und 52 unter Bildung einer mechanisch festen Einheit verspannt. Hierbei werden nicht nur die einzelnen Komponenten, wie Kontaktträger 13, Auslösehebel 14, Schwenkachse 12 und Kontaktbrücke 11 mechanisch fest miteinander verbunden, sondern die Kontaktbrücke 11 und dementsprechend auch die beiden bewegliche Kontaktstücke 111, 112 sind nun im Einschaltzustand des Schalters mit einer durch die Kennlinien der Federn 51 und 52 definierten Kontaktkraft auf den feststehenden Kontaktstücken abgestützt. Dies kann für die von den Kontaktstücken 111 und 30 gebildete Schaltstelle der Fig.1 entnommen werden. Ersichtlich ist im Einschaltzustand das bewegliche Kontaktstück 111 mit einer so starken Vorspannung gegen das feststehende Kontaktstück 30 gedrückt (und entsprechend auch das nicht ersichtliche bewegliche Kontaktstück 112 gegen ein weiteres feststehendes Kontaktstück), dass die am Vorsprung 132 anschlagende Kontaktbrücke 11 im Gegenuhrzeigersinn um den Vorsprung 132 geschwenkt wird und von der Auflagefläche 131 abhebt. Durch geeignete Bemessung der Biegefedern 51, 52 kann nicht nur die erwünschte Kontaktkraft, sondern kann zugleich auch Kontaktnachfederung erreicht werden. Abbrand der Kontaktstücke und damit verbundener Materialverlust kann so unter Beibehalt einer ausreichend bemessenen Kontaktkraft durch Nachführen der beweglichen Kontaktstücke 111 und 112 bzw. der Kontaktbrücke 11 mittels der Biegefedern 51, 52 kompensiert werden.When mounting the movable contact unit 10 of the contact carrier 14 and the return spring 144 in the groove 143 holding release lever 14 are plugged together so that the pivot axis 12 accordingly Figure 5 can be guided through these three parts. After placing the contact bridge 11 on the support surface 131 of the contact carrier 13, these five components with two of the FIGS. 3 and 5 apparent, mounted on the pivot axis 12 bending springs 51 and 52 braced to form a mechanically strong unit. Here, not only the individual components, such as contact carrier 13, trip lever 14, pivot axis 12 and contact bridge 11 are mechanically firmly connected to each other, but the contact bridge 11 and accordingly also the two movable contacts 111, 112 are now in the on state the switch with a defined by the characteristics of the springs 51 and 52 contact force supported on the fixed contact pieces. This can for the contact pieces 111 and 30 formed switching of the Fig.1 be removed. Obviously, in the on state, the movable contact piece 111 is pressed with such a strong bias against the fixed contact piece 30 (and correspondingly the not visible movable contact piece 112 against another fixed contact piece), that abutting the projection 132 contact bridge 11 in the counterclockwise direction around the projection 132nd is pivoted and lifted from the support surface 131. By suitable dimensioning of the bending springs 51, 52 not only the desired contact force, but at the same time Kontaktnachfederung can be achieved. Burning of the contact pieces and the associated loss of material can be compensated while maintaining a sufficiently sized contact force by tracking the movable contact pieces 111 and 112 and the contact bridge 11 by means of the bending springs 51, 52.

Aus Fig.3 ist zu ersehen, dass die Biegefedern 51 bzw. 52 jeweils eine von der Schwenkachse 12 durchdrungene zylindrische Schraubenfeder 511 bzw. 521 aufweisen mit jeweils zwei gegeneinander verdrehten Schenkeln 512, 513 bzw. 521, 523. Die Schenkel 513 und 523 sind jeweils in einer in den Kontaktträger 13 eingeformten Nut 138 bzw. 139 gehalten, wohingegen in die Schenkel 512 und 522 Haltefinger 515 und 525 eingeformt sind, welche unter Bildung der Vorspannung resp. der Kontaktkraft (im Einschaltzustand des Schutzschalters) auf der Kontaktbrücke 11 bzw. den beiden beweglichen Kontaktstücken 110 und 112 abgestützt sind.Out Figure 3 It can be seen that the torsion springs 51 and 52 each have a penetrated by the pivot axis 12 cylindrical coil spring 511 and 521 each having two mutually rotated legs 512, 513 and 521, 523. The legs 513 and 523 are each in a in the contact carrier 13 molded groove 138 and 139 held, whereas in the legs 512 and 522 holding fingers 515 and 525 are formed, which respectively to form the bias voltage. the contact force (in the ON state of the circuit breaker) on the contact bridge 11 and the two movable contact pieces 110 and 112 are supported.

Beim Auftreten eines Kurzschluss- oder Überstroms wird ein magnetisch oder thermisch wirkender Auslöser des Schutzschalters aktiviert und ein Auslöseglied eines der Auslöser schlägt dann an einem beider Finger 141 bzw. 145 oder der Aufschlagfläche 148 an. Der Auslösehebel 14 wird nun im Gegenuhrzeigersinn gegen die Kraft der Rückstellfeder 144 verdreht und hierbei eine vom Auslösehebel 14 und der Klinke 135 gebildete Verklinkung aufgehoben. Die unter der Wirkung eines nicht dargestellten geladenen Federspeichers stehende bewegliche Kontakteinheit 10 wird im Gegenuhrzeigersinn geschwenkt und die Kontaktanordnung 1 unter Bildung zweier in Serie geschalteter Schaltlichtbögen geöffnet.Upon the occurrence of a short-circuit or overcurrent, a magnetic or thermal trigger of the circuit breaker is activated and a trigger member of one of the triggers will then strike either finger 141 or 145 or the impact surface 148. The release lever 14 is now rotated in the counterclockwise direction against the force of the return spring 144 and this repealed a release of the release lever 14 and the pawl 135 formed. The standing under the action of a non-illustrated loaded spring storage movable contact unit 10 is pivoted counterclockwise and the Contact arrangement 1 opened to form two series-connected switching arcs.

Nach Löschen der Schaltlichtbögen in der Lichtbogenlöscheinrichtung 2 kann der Schutzschalter wieder eingeschaltet werden. Hierbei wird von einem nicht dargestellten Schalthebelsystem über den aus Fig. 2 ersichtlichen Übertragungsbügel 4 Kraft auf die Klinke 135 und die daran angelenkte bewegliche, wieder verklinkte Kontakteinheit 10 übertragen. Unter Aufladen des Federspeichers und unter Bildung der vorbestimmten Kontaktkraft wird die bewegliche Kontakteinheit im Uhrzeigersinn in die Einschaltposition gemäss Fig. 1 geführt.After deleting the switching arcs in the arc quenching device 2, the circuit breaker can be turned on again. This is from a shift lever system, not shown on the off Fig. 2 4 transmission of force on the pawl 135 and the hinged thereto articulated, re-latched contact unit 10. Under charging of the spring accumulator and forming the predetermined contact force, the movable contact unit is clockwise in the on position according to Fig. 1 guided.

Eine Vereinfachung der beschriebenen Ausführungsform der beweglichen Kontakteinheit 10 wird erreicht, wenn anstelle zweier Biegefedern lediglich eine Biegefeder verwendet wird. Diese Biegefeder kann eine der beiden Biegefedern 51 oder 52 sein. Mit Vorteil weist die bewegliche Kontakteinheit dann lediglich ein bewegliches Kontaktstück 111 oder 112 auf. Um aber auch Kontaktbrücken 11 gut positionieren zu können, ist eine Biegefeder vorgesehen mit zwei jeweils von der Schwenkachse durchdrungenen, zylindrische Schraubenfedern sowie mit einem die beiden Schraubenfedern kraftschlüssig koppelnden und auf dem Kontaktträger abgestützten U-förmigen Verbindungsabschnitt sowie mit zwei Schenkeln, welche sich jeweils an eine beider Schraubenfedern anschliessen und unter Bildung der Vorspannung auf der Kontaktbrücke 11 resp. den Kontaktstücken 111, 112 abstützen. Eine solche mit dem Bezugszeichen 53 gekennzeichnete Feder ist in Fig.3 teilweise gestrichelt eingezeichnet. Ersichtlich enthält diese Feder die beiden Federn 51 und 52, weist aber zusätzlich noch einen gestrichelt dargestellten Verbindungsabschnitt auf, welcher sich mit den beiden Schenkeln 512 und 522 zum U-förmigen Verbindungsabschnitt 531 ergänzt. Alternativ kann die Feder 53 aus den beiden Federn 51 und 52 auch durch Verbinden der beiden Finger 515 und 525 mit einem punktiert dargestellten Mittelabschnitt erzeugt werden. Die Feder 53 weist dann einen die beiden Schraubenfedern 511 und 521 kraftschlüssig koppelnden und auf der Kontaktbrücke 11 abgestützten U-förmigen Verbindungsabschnitt 532 auf. Die beiden Schenkel 513 und 523 sind dann in den Nuten 138 und 139 des Kontaktträger13 abgestützt.A simplification of the described embodiment of the movable contact unit 10 is achieved if only one bending spring is used instead of two bending springs. This bending spring may be one of the two spiral springs 51 or 52. Advantageously, the movable contact unit then has only one movable contact piece 111 or 112. But in order to be able to position contact bridges 11 well, a bending spring is provided with two penetrated by the pivot axis, cylindrical coil springs and a two coiled springs frictionally coupling and supported on the contact carrier U-shaped connecting portion and two legs, which in each case connect one of the two coil springs and forming the bias on the contact bridge 11, respectively. support the contact pieces 111, 112. Such designated by the reference numeral 53 spring is in Figure 3 partially dashed lines. Obviously, this spring contains the two springs 51 and 52, but additionally has a connecting portion shown in dashed lines, which complements with the two legs 512 and 522 to the U-shaped connecting portion 531. Alternatively, the spring 53 may be formed from the two springs 51 and 52 also by connecting the two fingers 515 and 525 with a dotted center portion. The spring 53 then has a the two coil springs 511 and 521 frictionally coupling and supported on the contact bridge 11 U-shaped connecting portion 532. The two legs 513 and 523 are then supported in the grooves 138 and 139 of the Kontaktträger13.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
KontaktanordnungContact arrangement
1010
bewegliche Kontakteinheitmovable contact unit
1111
KontaktbrückeContact bridge
111,112111,112
bewegliche Kontaktstückemovable contact pieces
113113
Platteplate
114114
Öffnungopening
1212
Schwenkachseswivel axis
1313
Kontaktträgercontact support
131131
Auflageflächebearing surface
132132
Vorsprunghead Start
133133
Nasenose
134134
Schwenkachseswivel axis
135135
Klinkenhebel, KlinkeLatch lever, latch
136, 137136, 137
Tragarmecarrying arms
138, 139138, 139
Nutengroove
1414
Auslösehebelsear
141141
Fingerfinger
142142
Nasenose
143143
Nutgroove
144144
RückstellfederReturn spring
145145
Fingerfinger
146, 147146, 147
SteckteileSteckteile
148148
Aufschlagflächeimpact surface
22
LichtbogenlöscheinrichtungArc quenching device
21,2221.22
LichtbogenlaufschienenArc guide rails
2323
LichtbogenlöschkammerArc chute
2424
Trennwandpartition wall
3030
feststehendes Kontaktstückfixed contact piece
44
Übertragungsbügeltransmission bars
51,52,5351,52,53
Biegefedernbending springs
511, 521511, 521
Schraubenfederncoil springs
512, 513, 522, 523512, 513, 522, 523
Schenkelleg
515, 525515, 525
Haltefingerholding fingers
531, 532531, 532
U-förmige VerbindungsabschnitteU-shaped connecting sections

Claims (11)

  1. Moving contact unit (10) for a contact arrangement (1) in a circuit breaker, containing a contact mount (13), two contact pieces (111, 112) which are held by the contact mount (13), a tripping lever (14) and a bending spring (51, 52, 53), in which the contact mount (13) and the tripping lever (14) are arranged on a pivoting shaft (12), which can be mounted in the switch, and the tripping lever (14) and a catch (135), which is mounted on the contact mount (13) form a latching point, and in which one of the two contact pieces (111, 112) rests on the contact mount (13) and is held on the contact mount (13) by the prestressed bending spring (51, 52, 53), characterized in that the catch (135) is mounted on the contact mount (13) such that it can pivot, in that the bending spring (51, 52, 53) is mounted on the pivoting shaft (12) and in that the two contact pieces (111, 112) are part of a U-shaped contact link (11) whose limbs form the two contact pieces (111, 112), and whose base is in the form of a plate (113) and rests on one surface (131) of the contact mount (13).
  2. Contact unit according to Claim 1, characterized in that the bending spring (51, 52) has a cylindrical helical spring (511, 521), through which the pivoting shaft (12) passes and which has two limbs (512, 513; 522, 523) which can rotate in opposite directions with respect to one another and of which a first limb (513, 523) is supported on the contact mount (13) and the second (512, 522) is supported on the contact piece (11), forming the prestress.
  3. Contact unit according to Claim 2, characterized in that a holding finger (515, 525) which clasps the contact piece (11) is formed in the second limb (512, 522).
  4. Contact unit according to Claim 3, characterized in that the first limb (512, 522) is held in a groove (138, 139) which is formed in the contact mount (13).
  5. Contact unit according to Claim 1, characterized in that the bending spring (53) has two cylindrical helical springs (511, 521), through each of which the pivoting shaft (12) passes, and has a U-shaped connection section (531) which couples the two helical springs (511, 521) with a force fit and is supported on the contact mount (13), and has two limbs (512, 522) which are respectively connected to in each case one of the two helical springs (511, 521) and are supported on the contact piece (11), forming the prestress.
  6. Contact unit according to Claim 1, characterized in that the bending spring (53) has two cylindrical helical springs (511, 521), through each of which the pivoting shaft (12) passes, and has a U-shaped connection section (532) which couples the two helical springs (511, 521) with a force fit and is supported on the contact piece (11), and has two limbs (513, 523) which are respectively connected to in each case one of the two helical springs (511, 521) and are supported on the contact mount (13), forming the prestress.
  7. Contact unit according to Claim 1, characterized in that the plate (113), on its side which faces away from the contact pieces (111, 112), strikes against a projection (132) which is formed in the contact mount (13).
  8. Contact unit according to Claim 7, characterized in that the plate (113) has an opening (114) into which a tab (132) which is formed in the contact mount (13) projects.
  9. Contact unit according to Claim 8, characterized in that a finger (141) which is formed in the tripping lever (14) is passed through the opening (114).
  10. Contact arrangement having the contact unit according to one of Claims 1 to 9.
  11. Circuit breaker having the contact arrangement according to Claim 10.
EP04405415A 2004-07-05 2004-07-05 Movable contact unit for contact arrangement in circuit breaker Expired - Lifetime EP1615252B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT04405415T ATE407444T1 (en) 2004-07-05 2004-07-05 MOVABLE CONTACT UNIT FOR A CONTACT ARRANGEMENT OF A CIRCUIT SWITCH
DE502004007985T DE502004007985D1 (en) 2004-07-05 2004-07-05 Mobile contact unit for a contact arrangement of a circuit breaker
EP04405415A EP1615252B1 (en) 2004-07-05 2004-07-05 Movable contact unit for contact arrangement in circuit breaker
ES04405415T ES2312946T3 (en) 2004-07-05 2004-07-05 MOBILE CONTACT UNIT FOR A CONTACT PROVISION OF A PROTECTION SWITCH.
US11/152,256 US7132912B2 (en) 2004-07-05 2005-06-15 Moving contact unit for a contact arrangement in a circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405415A EP1615252B1 (en) 2004-07-05 2004-07-05 Movable contact unit for contact arrangement in circuit breaker

Publications (2)

Publication Number Publication Date
EP1615252A1 EP1615252A1 (en) 2006-01-11
EP1615252B1 true EP1615252B1 (en) 2008-09-03

Family

ID=34932181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405415A Expired - Lifetime EP1615252B1 (en) 2004-07-05 2004-07-05 Movable contact unit for contact arrangement in circuit breaker

Country Status (5)

Country Link
US (1) US7132912B2 (en)
EP (1) EP1615252B1 (en)
AT (1) ATE407444T1 (en)
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CN114649174A (en) * 2020-12-21 2022-06-21 上海良信电器股份有限公司 Moving contact system easy to install and assembling method thereof
CN113161176B (en) * 2021-03-25 2022-09-13 中车株洲电力机车有限公司 Method for machining vertical type vacuum circuit breaker transmission bracket for bullet train
CN114220717B (en) * 2021-12-21 2025-04-11 湖北腾明智能电气有限公司 A closing and opening mechanism
CN115424902B (en) * 2022-09-07 2024-04-23 加西亚电子电器股份有限公司 Leakage circuit breaker

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DE502004007985D1 (en) 2008-10-16
ES2312946T3 (en) 2009-03-01
ATE407444T1 (en) 2008-09-15
EP1615252A1 (en) 2006-01-11
US20060001511A1 (en) 2006-01-05
US7132912B2 (en) 2006-11-07

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