EP1615252B1 - Movable contact unit for contact arrangement in circuit breaker - Google Patents
Movable contact unit for contact arrangement in circuit breaker Download PDFInfo
- 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
Links
- 238000005452 bending Methods 0.000 claims abstract description 25
- 238000010791 quenching Methods 0.000 description 8
- 230000000171 quenching effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
-
- 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
- H01H2001/223—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 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.
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
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.
Eine bewegliche Kontakteinheit der vorgenannten Art ist aus
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
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
Eine bewegliche Kontakteinheit der Kontaktanordnung eines Schutzschalters ist auch in
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.
- 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.
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 .
- 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 ,
In allen Figuren beziehen sich gleiche Bezugszeichen auf gleichwirkende Teile. In
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
Wie aus den
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
Aus
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
Nach Löschen der Schaltlichtbögen in der Lichtbogenlöscheinrichtung 2 kann der Schutzschalter wieder eingeschaltet werden. Hierbei wird von einem nicht dargestellten Schalthebelsystem über den aus
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
- 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)
- 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).
- 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.
- 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).
- 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).
- 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.
- 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.
- 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).
- 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.
- 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).
- Contact arrangement having the contact unit according to one of Claims 1 to 9.
- Circuit breaker having the contact arrangement according to Claim 10.
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) |
| DE (1) | DE502004007985D1 (en) |
| ES (1) | ES2312946T3 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004055564B4 (en) * | 2004-11-18 | 2022-05-05 | Abb Ag | Electrical installation switching device |
| FR2996678B1 (en) * | 2012-10-05 | 2014-10-31 | Schneider Electric Ind Sas | DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION DEVICE AND ELECTRICAL PROTECTION APPARATUS COMPRISING IT |
| US8809722B2 (en) * | 2012-10-11 | 2014-08-19 | Siemens Industry, Inc. | Circuit breaker with translating electrical contact, circuit breaker electrical contact assemblies, and operational methods |
| CN105914110B (en) * | 2016-06-20 | 2017-10-20 | 浙江天正电气股份有限公司 | A kind of miniature circuit breaker |
| CN108010820B (en) * | 2017-12-22 | 2024-12-17 | 上海诺雅克电气有限公司 | breaker |
| CN108878226B (en) * | 2018-07-13 | 2024-05-17 | 浙江正泰电器股份有限公司 | Circuit breaker |
| CN111710539A (en) * | 2020-07-20 | 2020-09-25 | 上海瑞忒尔电气技术有限公司 | A contact system of a switchgear |
| WO2022126335A1 (en) * | 2020-12-14 | 2022-06-23 | Abb S.P.A. | Adjustment mechanism for circuit breaker and corresponding circuit breaker |
| 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 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2370206A (en) * | 1943-01-19 | 1945-02-27 | Chase Shawmut Co | Circuit breaker |
| US4641001A (en) * | 1984-06-15 | 1987-02-03 | Mitsubishi Denki Kabushiki Kaisha | Circuit interrupter |
| JPH0119315Y2 (en) * | 1984-09-19 | 1989-06-05 | ||
| US4618745A (en) * | 1985-04-01 | 1986-10-21 | Heinemann Electric Company | Circuit breaker mechanism |
| US5214402A (en) * | 1991-12-23 | 1993-05-25 | North American Philips Corporation | Trip link latch and interpole link for a circuit breaker |
| EP0570647B1 (en) * | 1992-05-13 | 1994-03-02 | Hager Electro S.A. | Switch latch for a circuit breaker and circuit breakers incorporating it |
| AT404648B (en) * | 1992-06-29 | 1999-01-25 | Felten & Guilleaume Ag Oester | SELF-SWITCH |
| CH685524A5 (en) | 1993-03-19 | 1995-07-31 | Maier & Cie C | Circuit breaker. |
| US5539167A (en) * | 1994-02-14 | 1996-07-23 | Square D. Company | Blade suspension assemlby for a circuit breaker |
| FR2723470A1 (en) * | 1994-08-04 | 1996-02-09 | Legrand Sa | BREAKER |
| EP1170769B1 (en) * | 2000-10-19 | 2002-03-13 | Hager Electro S.A. | Snap closing mechanism for modular circuit breaker |
| IT1319753B1 (en) * | 2000-12-27 | 2003-11-03 | Abb Ricerca Spa | CURRENT LIMITER SWITCH |
-
2004
- 2004-07-05 AT AT04405415T patent/ATE407444T1/en not_active IP Right Cessation
- 2004-07-05 EP EP04405415A patent/EP1615252B1/en not_active Expired - Lifetime
- 2004-07-05 DE DE502004007985T patent/DE502004007985D1/en not_active Expired - Lifetime
- 2004-07-05 ES ES04405415T patent/ES2312946T3/en not_active Expired - Lifetime
-
2005
- 2005-06-15 US US11/152,256 patent/US7132912B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| 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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