EP2898525B1 - Circuit breaker contact system - Google Patents
Circuit breaker contact system Download PDFInfo
- Publication number
- EP2898525B1 EP2898525B1 EP13771417.6A EP13771417A EP2898525B1 EP 2898525 B1 EP2898525 B1 EP 2898525B1 EP 13771417 A EP13771417 A EP 13771417A EP 2898525 B1 EP2898525 B1 EP 2898525B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- arm
- lever
- contact arm
- spring
- 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.)
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Classifications
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- 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
- H01H71/505—Latching devices between operating and release mechanism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
- H01H77/105—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement whereby the blow-off movement unlatches the contact from a contact holder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3031—Means for locking the spring in a charged state
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
- H01H73/26—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by tumbler
Definitions
- the present invention relates to a contact system of a circuit breaker, more particularly to a low-voltage circuit breaker or motor protection switch having improved functions and characteristics.
- Contact systems of circuit breakers for at least one pole are equipped with a contact arm formed as a contact, wherein the contact arm is acted upon by a contact force spring to produce a contact pressure in the closed position, the contact arm is rotatably mounted about a contact arm pivot in a switch housing in which the low-voltage switch is actuated
- the contact force spring may be stationarily supported in the switch and act as a compression spring to a lever end of the contact arm ( DE 3818864A1 ).
- the DE 28 51 817 C3 describes a low-voltage circuit breaker, in which a helical compression spring serving as a contact force spring is arranged between a contact piece carrier and a movable contact piece, which is held pivotably on the contact piece carrier by means of a hinge pin, in the form of a contact arm.
- the existing of the movable contact piece and the contact piece carrier assembly is in turn mounted on a shift shaft and can be operated via two coupled via a knee joint pin toggle.
- main pawl which is a hinge pin is pivotable and is supported with its other end in the latched state of the switch on a locking member, which in turn is held by a substantially planar two-armed, pivotable about a pivot lever lever in a Verklinkungswolf. Due to a special design of this complex, consisting of main pawl, intermediate pawl and locking member Verklinkungssystems the forces occurring during unlatching can be absorbed as low as possible.
- the object of this invention is to provide a concept of a low-voltage circuit breaker, in which one can make do with a reduced spring force in the contact system, which provides better parameters for an optimal setting, and in which a better balance between forces and dimensions is possible.
- An essential core of the contact system according to the invention in its first embodiment is that the contact force spring between the contact and a lever which is rotatable about a lever pivot point is arranged.
- the contact force spring acts on both sides of the contact arm and the lever and is otherwise not supported.
- Lever and contact arm unlatch when an electrodynamically induced opening movement (short circuit or overcurrent).
- the latching is again achieved by tensioning (reset) the contact system.
- One of the advantages of the invention is that, after the electrodynamically induced opening movement, the contact can not re-collapse because the contact force spring is disengaged from the contact arm.
- the contact force springs in the embodiments may be formed with a lower spring force, as is the case with conventional switching systems.
- the advantage is based on the fact that the lever arms are made larger, whereby the torque generating the contact force can be supplied by a correspondingly reduced spring force.
- the spring forces can be reduced to about one fifth or one quarter, whereby the - so far very high - requirements for the mechanical quality of the contact force springs can be reduced.
- the contact system may be designed as a single contact or as a double breaker.
- the contact and contact separation can take place between moving contacts and fixed contacts in air, vacuum or inert gas.
- the construction according to the invention in all embodiments is designed so that the one or more rotatable (s) lever and the or the contact arm (s) remain latched together with manual switch operation via the handle in any position of the contact system.
- Lever and Grekraftarm (e) unlatched in an electrodynamically or when acted upon by a trigger-operatively connected trigger element caused opening.
- a transfer of the contact system in the normal position after electrodynamically induced or effected by the trigger element opening lock lever and contact arm (e) again.
- the contact system in the "double breaker" version has a symmetrical construction around the contact arm center.
- the contact arm is designed as a rotatably mounted in its center two-armed, symmetrical moving contact, and each a rotatable lever is arranged on each side of the contact arm. Further, each contact force spring between one side of the contact arm and one of the rotatable lever is arranged. Again, the contact force springs act on both ends contact arm and lever
- Contact arm and lever are arranged with their axes of rotation axially parallel in a switching shaft or in a switching shaft segment.
- the rotatable lever may be formed in the embodiment "single contact" one-armed or two-armed.
- the lever has at its free end a certain latching with the contact arm nose.
- the contact arm can also be designed with one arm or two arms.
- lever and contact arm lever and contact are each installed so that one arm is mounted in the direction of the contact.
- lever and contact arm of the two-armed lever and the two-armed contact arm are each installed so that their first arm are mounted in the direction of the contact and the second arm in the opposite direction.
- the formed in the opposite direction of the second arms may be formed angled relative to the position of the first arm. Lever and contact arm are therefore not present in a stretched form.
- the contact arm may have a window through which the lever engages.
- This construction has the advantage that contact arm and lever can be arranged in a plane perpendicular to their pivot points.
- contact arm and lever are arranged adjacent.
- the contact force spring may be formed as a tension spring, as a compression spring, as a leaf spring or as a spiral spring.
- Contact arm and / or lever may each have a holding element to which the contact force spring is permanently attached between the contact arm and lever.
- the contact force spring is located between the contact arm and the rotatable lever in the form of a tension spring or a compression spring.
- the contact force spring at one end is rotatably mounted about a spring pivot point, and the contact force spring at the other end (with its free end) acts on the contact arm with a torque generating the contact force.
- the contact force spring is preferably formed as einschenklige leaf spring.
- a leaf spring has about a half of its length on a bulge, with which a support against the contact arm is set up.
- the free end of the leaf spring may be formed as a tongue which abuts the contact arm (in the latched state).
- the contact arm has a holding element, against which, in particular designed as a leaf spring contact force spring is supported at least in the Verklinktgov.
- the contact system for a low-voltage switch for at least one pole in a switch housing, in which the switch can be actuated is equipped with a contact arm 10 designed as a moving contact.
- This can be designed as a single arm in a single contact in a first embodiment and in a second embodiment in two arms.
- a double breaker (see FIG. 6 ) presented, the contact arm is also formed with two arms.
- the contact arm is rotatably mounted about a pivot point 12 and is acted upon by a contact force spring 18, 18 "19, 19 ', 19", 27, 27' for generating the contact pressure.
- the contact system has a lift-through gap 15. The contact pressure is maintained, even if - to a certain extent - a burning of the contact pieces has occurred.
- Lever 21 and contact arm 10 are mounted axially parallel in the shift shaft 13.
- a rotatable lever 21 is mounted about a pivot point 23 and engages with its free (front) end by a trained in the contact arm 10 window 16. At its end, the lever 21 carries a nose 24, which is formed in the direction of the contact arm 10. Lever 21 and the contact arm 10 are latched together via the nose 24, as long as they are not subjected to an electrodynamically induced opening movement.
- the Verklinkt ein is solved in an electrodynamically induced opening movement.
- electrical direct or alternating currents exert a magnetic field on current-conducting paths (Lorentz forces).
- Lorentz forces are utilized in particular at higher currents, such as overload or short-circuit currents, when opening a contact system, where these forces contribute to the accelerated opening movement of the moving contact 10.
- the fixed contact carrier (8) U-shaped - can be designed as a conductor loop - and can be provided with a connection conductor or a terminal.
- FIG. 1A and 1B show the contact system in the two - produced by manual operation on the handle 7 - end positions of the switch in ON ( FIG. 1A ) and in AUS ( FIG. 1B ).
- the rotatable lever 21 and the contact arm 10 are latched together with manual switch operation on the handle 7 in each position of the contact system between ON and OFF and back, previously referred to as 'normal position'.
- FIG. 1B a position of the components is shown, where on the operating handle (handle 7), the shift shaft 13 is rotated to the left and thus the contact system is open (turned OFF).
- the contact force spring 19 - designed here as a compression spring - is arranged solely between the contact arm 10 and the lever 21. Compared to other known contact systems, the contact force spring is not supported in the switching shaft or elsewhere in the housing.
- the contact arm 10 has a holding element (see in particular the reference numerals 11 and 20 in FIG FIG. 3 ) against which the contact force spring 18 (19) is supported or attached there.
- the contact force spring is arranged captive between the contact arm and lever.
- the contact force spring may be formed in a suitable manner almost as any spring element; here are tension spring, compression spring, leaf spring or coil spring in question.
- Retaining elements (11, 20) of the respectively used contact force spring as contact or support points on the lever 22 or on the contact arm 10 may be: hooks, pins, flanging or the like.
- the latch between rotatable lever and contact arm is achieved in that the lever has at its free end for latching with the contact arm 10 specific nose 24.
- the Verklinkungsstelle in or on the contact arm may be an abutment, a pin or an edge.
- a window 16 for the passage of the free end of the lever 21 is present.
- the mentioned nose 24 engages in the Verklinktwolf in the front, extending to the moving contact portion of the contact arm on an edge of the window.
- the lever engages from below through the window 16 in the contact arm on the contact arm 10 (see. FIG. 1A, 1B and 2 ).
- the lever 22 engages from above on the contact arm 10 (see FIG. 3 ).
- the respective embodiments differ in that in the construction "lever from below” a compression spring and in the construction "lever from above” a tension spring is used as a contact force spring. Both constructions have in common that the free front end of the lever acts on the side of the contact arm, which lies opposite the moving contact piece.
- lever from below and “lever from above” is characterized in that in the construction “lever from below” the lever extends almost its entire length on the side of the contact arm on which the moving contact piece is arranged. Only a short front end, which preferably carries a nose for loading on the contact arm, extends to the other side of the contact arm, namely to the moving contact piece opposite side. In the “lever from above” construction, at least half the length of the lever extends on the side of the contact arm that faces the moving contact piece.
- FIG. 2 shows an intermediate position of the contact system during an electrodynamically induced opening movement with lever 21, contact arm 10 and fixed contact 8 shortly after the opening of the contact.
- the switching shaft 13 retains its position in the described opening movement, it is not moved.
- the nose 24 on the lever 21 loses the support on the contact arm and leaves the Verklinkt ein.
- the force of the compression spring 19 hurls the contact arm in its full open position.
- With reference numeral 14 'stops are located against which the lever falls back, or is supported.
- a special feature of the invention is that no retro-rotating forces occur on the contact arm and the contact system does not close again.
- Many low-voltage switches with contact force spring are structurally designed so that the contact-closing effect of the contact force spring is present after opening of the contact and remains present. Feathers or bounces of the system would pass through the contact closing spring force close the contact again.
- the contact system can be returned to the ON position.
- the contact arm with the moving contact piece comes to rest on the fixed contact (fixed contact piece) (again as in FIG. 1B ).
- the latch is available again.
- FIG. 3 shows a further inventive contact system with tension spring between BewegtCountarm and lever.
- the lever 22 engages in this embodiment of the top of the contact arm; contrary to the execution according to FIG. 1 where the rotatable lever engages coming from below on the contact arm.
- tension spring 18 and contact arm 10 holding elements 11 and 20 are shown, which ensure that the spring 18 remain captive arranged on the contact arm 10 and the lever.
- the front end 24 of the lever is located on the contact arm 10.
- the here designed as a tension spring 18 contact force spring generates the contact force.
- the forces of the contact force spring 18 with the pivot points (23, 12) on the lever 22 and on the contact arm 10 provide a right-handed torque as a contact force in the closed position.
- FIG. 4 and FIG. 5 show two more contact systems, in which preferably a leaf spring is used as a contact force spring.
- the contact force spring and lever form a one-piece, one-piece component 27, 27 'rotatably mounted about a pivot point (23).
- the contact force spring and lever are fused in a single, one-limbed and rotatable about a pivot element.
- FIG. 4 a contact system is shown in which the leaf spring 27 - similar to the lever 21 according to FIG. 1 - attacks the contact arm from below. Comparable are the presence of a nose or tongue 24 at the front end of the leaf spring and the passage of the leaf spring 27 through an opening 16 in the contact arm.
- the leaf spring 27 has a bulge 28 in the direction of the contact arm, with which an immediate power transmission comes about. It accounts in this embodiment holding elements between the spring (27) and contact arm, as in the contact system according to FIG. 1 or FIG. 3 (see reference numerals 11 and 20) are present.
- FIG. 5 is a second contact system with leaf spring 27 'shown as a contact force spring, where the leaf spring 27' engages from above on the contact arm, similar to in FIG. 3 where also a lever 22 engages the contact arm.
- leaf spring 27 ' shown as a contact force spring, where the leaf spring 27' engages from above on the contact arm, similar to in FIG. 3 where also a lever 22 engages the contact arm.
- a driver 30 is present, on which the upwardly curved leaf spring 27 'is supported.
- FIG. 6 a contact system according to the invention presented as a double breaker 6.
- the contact arm 10 ' is formed as a rotatably mounted in its center 12 two-armed symmetrical moving contact 10'.
- the contact arm 10 ' is mounted in a slot 41.
- a rotatable lever 21 ' is disposed on each arm side, and each a contact force spring 19' is disposed between one side of the contact arm 10 'and one of the rotatable levers 21'.
- the contact force springs 19 ' are compression springs.
- the levers 21 ' engage through a respective window 16 on one arm side by the contact arm.
- the levers 21 ' have at their front end a nose 24.
- This construction is an extension of the inventive principle according to FIG. 1 on a double breaker.
- the contact arm with the moving contact piece comes to rest on the fixed contact (fixed contact piece) (again as in FIG. 1 ).
- FIG. 6 The function of the invention according to FIG. 6 is immediately as a transfer of the description FIG. 1 recognizable to the skilled person.
- FIGS. 7 and 8 show variants of embodiments of a single contact. Details that have already been described, and identical in FIG. 7 and FIG. 8th reappear, will not be explained again.
- the lever 21 “, 22" and the contact arm 10 are each formed with two arms, one arm 10A, 21A, 22A being supported in the direction of the contact and the second arm 10B, 21B, 22B being supported in the opposite direction second arm 10B, 21B, 22B is angled according to the embodiment shown in these two figures FIG. 7
- the second arms 10B, 21B of lever 21 "and contact arm 10" form an obtuse angle with the first arms 10A, 21A.
- the contact force spring 18 " is designed as a tension spring FIG. 7 In the function corresponds essentially to the embodiment according to FIGS. 1A, 1B and 2 , Furthermore, between the tension spring 18 "and the second arm 10B of the contact arm 10" holding elements located, whereby the tension spring 18 "remains captive.
- FIG. 8th is a variant of the other contact system, according to the FIG. 3 , in front.
- the variants of FIG. 3 and FIG. 8th show an embodiment with a contact force spring 19 ", which is designed as a compression spring.
- the aforementioned embodiments have in common that the one or more rotatable levers in 'normal' contact open or close with the contact arm are in a Verklinktgna. Leave lever and contact arm - caused by electrodynamic opening - the Verklinktgna. After a reset process, the or the Lever again in the Verklinktgna.
- FIG. 9 and FIG. 10 show a further variant of the first contact system according to FIGS. 1A, 1B and 2 .
- a releasably mounted in the switch housing trigger element 42 is provided here.
- the triggering element 42 is in direct or indirect operative connection with conventional triggers, which in the event of tripping, ie act on faulty currents, the triggering element in the release direction D.
- the trigger element 42 is not shown by conventional spring means in the in FIG. 9 shown rest position held.
- FIG. 10 When the triggering element 42 is acted upon, this applies according to FIG. 10 on the lever 21 and releases it from the Verklinkung with the contact arm 10, which then pivots under the action of the contact force spring 19 in the open position to the stop 14. After an electrodynamic or by triggering Entklinkung the lever 21 passes through a reset process again in the Verklinkt ein.
- tripping elements 42 provided on the pole are connected via a transverse web 43.
- FIG. 11 shows a variant of designed as a double breaker contact system according to FIG. 6 ,
- a trigger element 42 ' is provided, which is rotatably mounted in a formed in the switch housing or on the switching shaft pivot axis 47.
- the trigger element 42 ' is held by not shown conventional spring means in the rest position shown.
- the triggering element 42 ' is in direct or indirect operative connection with conventional triggers, which act on the tripping element in the release direction D' when triggered.
- the trigger member 42 hits on the levers 21' provided drivers 45 and takes them in the counterclockwise direction, which the lever 21 'from the latch with the associated arms of the double-armed contact arm 10' dissolves.
- the contact arm 10 pivots thereon under the action of the contact force springs 19' in the open position. After an electrodynamic or caused by triggering unlatching reach the lever 21 'by a reset process again in the Verklinktgna.
- multi-pole switches are provided polweise triggering elements 42 'connected via a transverse web 43'.
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Description
Die vorliegende Erfindung bezieht sich auf ein Kontaktsystem eines Leistungsschutzschalters, genauer gesagt auf einen Niederspannungs-Leistungsschalter oder einen Motorschutzschalter mit verbesserten Funktionen und Eigenschaften.The present invention relates to a contact system of a circuit breaker, more particularly to a low-voltage circuit breaker or motor protection switch having improved functions and characteristics.
Kontaktsysteme von Leistungsschutzschaltern für mindestens einen Pol sind mit einem als Kontaktarm ausgebildeten Bewegtkontakt ausgestattet, wobei der Kontaktarm mittels einer Kontaktkraftfeder zur Erzeugung eines Kontaktdrucks in Schließstellung beaufschlagt wird Der Kontaktarm ist um einen Kontaktarm-Drehpunkt in einem Schaltergehäuse drehbar gelagert, in dem der Niederspannungsschalter betätigt wird Es sind vielfältige Lösungen der Lagerung einer Kontaktkraftfeder in einem Kontaktsystem bekannt. Beispielsweise kann die Kontaktkraftfeder ortsfest im Schalter abgestützt sein und als Druckfeder ein Hebelende des Kontaktarms beaufschlagen (
Die
Aus der
Aus der
Die Aufgabe dieser Erfindung ist es, ein Konzept eines Niederspannungs-Leistungsschalters anzugeben, bei dem man im Kontaktsystem mit einer verminderten Federkraftstärke auskommt, was bessere Parameter für eine optimale Einstellung liefert, und bei dem eine bessere Abstimmung zwischen Kräften und Abmessungen möglich ist.The object of this invention is to provide a concept of a low-voltage circuit breaker, in which one can make do with a reduced spring force in the contact system, which provides better parameters for an optimal setting, and in which a better balance between forces and dimensions is possible.
Die Lösung der Aufgabe wird in nebengeordneten Ansprüchen dargestellt. Weiterführende und vorteilhafte Ausbildungen sind in jeweiligen Unteransprüchen formuliert.The solution of the problem is presented in the independent claims. Further and advantageous embodiments are formulated in the respective subclaims.
Ein wesentlicher Kern des erfindungsgemäßen Kontaktsystems in seiner ersten Ausbildung liegt darin, dass die Kontaktkraftfeder zwischen Kontaktarm und einem um einen Hebel-Drehpunkt drehbeweglichen Hebel angeordnet ist. Die Kontaktkraftfeder beaufschlagt beidendig den Kontaktarm und den Hebel und ist sonst nicht weiter abgestützt. Lage desAn essential core of the contact system according to the invention in its first embodiment is that the contact force spring between the contact and a lever which is rotatable about a lever pivot point is arranged. The contact force spring acts on both sides of the contact arm and the lever and is otherwise not supported. Location of the
Kontaktarm-Drehpunkts und Lage des Hebel-Drehpunkts und Längen von Hebel und von Kontaktarm sind zueinander so bemessen, dass ein resultierendes die Kontaktkraft erzeugendes Drehmoment auf den Kontaktarm vorhanden ist, wobei der drehbewegliche Hebel und der Kontaktarm bei manueller Schalterbetätigung über eine Handhabe in jeder Stellung des Kontaktsystems zwischen EIN und AUS (manuelles Öffnen und Schließen) und zurück miteinander verklinkt sind. Der Zustand 'verklinkt' bedeutet, dass Hebel und Kontaktarm einen eng benachbarten Abstand zueinander haben und in einem vorgegebenen Bewegungsablauf drehbeweglich sind. Die Spannung der Kontaktkraftfeder ist in diesem Zustand definiert.Contact arm pivot point and position of the lever pivot point and lengths of lever and contact arm are sized to each other such that a resultant contact force generating torque is present on the contact arm, wherein the rotatable lever and the contact arm with manual switch operation via a handle in any position of the contact system between ON and OFF (manual opening and closing) and latched back together. The condition 'latched' means that the lever and the contact arm have a closely spaced distance from each other and are rotatable in a given sequence of movements. The tension of the contact force spring is defined in this state.
Hebel und Kontaktarm entklinken bei einer elektrodynamisch veranlassten Öffnungsbewegung (bei Kurzschluss oder Überstrom). Die Verklinkung kommt wieder zustande durch Spannen (Reset) des Kontaktsystems.Lever and contact arm unlatch when an electrodynamically induced opening movement (short circuit or overcurrent). The latching is again achieved by tensioning (reset) the contact system.
Einer der Vorteile der Erfindung liegt darin, dass nach elektrodynamisch veranlasster Öffnungsbewegung ein Wiederzufallen des Kontakts nicht auftreten kann, weil die Kontaktkraftfeder hierbei mit dem Kontaktarm außer Eingriff kommt.One of the advantages of the invention is that, after the electrodynamically induced opening movement, the contact can not re-collapse because the contact force spring is disengaged from the contact arm.
Ein weiterer Vorteil der Erfindung liegt darin, dass die Kontaktkraftfedern in den Ausführungsformen mit einer geringeren Federkraft ausgebildet sein können, als es bei herkömmlichen Schaltsystemen der Fall ist. Der Vorteil beruht auf der Tatsache, dass die Hebelarme größer ausgebildet sind, wodurch das die Kontaktkraft erzeugende Drehmoment von einer entsprechend verminderten Federkraft geliefert werden kann. Die Federkräfte können etwa auf ein Fünftel oder ein Viertel gesenkt werden, wodurch die - bisher sehr hohen - Anforderungen an die mechanische Qualität der Kontaktkraftfedern gesenkt werden kann.Another advantage of the invention is that the contact force springs in the embodiments may be formed with a lower spring force, as is the case with conventional switching systems. The advantage is based on the fact that the lever arms are made larger, whereby the torque generating the contact force can be supplied by a correspondingly reduced spring force. The spring forces can be reduced to about one fifth or one quarter, whereby the - so far very high - requirements for the mechanical quality of the contact force springs can be reduced.
Die Erfindung ist in mehreren Ausführungen ausgeformt, wobei die Merkmale der Ausführungsformen einzeln oder - soweit zutreffend - gemeinsam beansprucht sein können.The invention is embodied in several embodiments, wherein the features of the embodiments can be claimed individually or - if applicable - jointly.
Das Kontaktsystem kann als Einfachkontakt oder als Doppelunterbrecher ausgebildet sein. Die Kontaktgabe und Kontakttrennung kann zwischen Bewegtkontakten und Festkontakten in Luft, Vakuum oder Schutzgas stattfinden.The contact system may be designed as a single contact or as a double breaker. The contact and contact separation can take place between moving contacts and fixed contacts in air, vacuum or inert gas.
Die erfindungsgemäße Konstruktion bei allen Ausführungsformen ist so gestaltet, dass der oder die drehbewegliche(n) Hebel und der oder die Kontaktarm(e) bei manueller Schalterbetätigung über die Handhabe in jeder Stellung des Kontaktsystems miteinander verklinkt bleiben. Hebel und Kontaktkraftarm(e) entklinken bei einer elektrodynamisch oder bei Beaufschlagung durch ein mit Auslösern wirkverbundenen Auslöseelement veranlassten Öffnung. Während einer Überführung des Kontaktsystems in die Normalstellung nach elektrodynamisch veranlasster oder durch das Auslöseelement bewirkter Öffnung verklinken Hebel und Kontaktarm(e) wieder.The construction according to the invention in all embodiments is designed so that the one or more rotatable (s) lever and the or the contact arm (s) remain latched together with manual switch operation via the handle in any position of the contact system. Lever and Kontaktkraftarm (e) unlatched in an electrodynamically or when acted upon by a trigger-operatively connected trigger element caused opening. During a transfer of the contact system in the normal position after electrodynamically induced or effected by the trigger element opening lock lever and contact arm (e) again.
Das Kontaktsystem hat in der Ausführung "Doppelunterbrecher" einen um die Kontaktarmmitte symmetrischen Aufbau. Hierbei ist der Kontaktarm als ein in seiner Mitte drehgelagerter zweiarmiger, symmetrischer Bewegtkontakt ausgebildet, und je ein drehbeweglicher Hebel ist auf jeder Seite des Kontaktarms angeordnet. Weiter ist je eine Kontaktkraftfeder zwischen einer Seite des Kontaktarms und einem der drehbeweglichen Hebel angeordnet. Wiederum beaufschlagen die Kontaktkraftfedern beidendig Kontaktarm und HebelThe contact system in the "double breaker" version has a symmetrical construction around the contact arm center. Here, the contact arm is designed as a rotatably mounted in its center two-armed, symmetrical moving contact, and each a rotatable lever is arranged on each side of the contact arm. Further, each contact force spring between one side of the contact arm and one of the rotatable lever is arranged. Again, the contact force springs act on both ends contact arm and lever
Im Folgenden sollen weitere wesentliche Merkmale der Ausführungsformen kurz angesprochen werden.In the following, further essential features of the embodiments will be briefly addressed.
Kontaktarm und Hebel sind mit ihren Drehachsen achsparallel in einer Schaltwelle oder in einem Schaltwellensegment angeordnet.Contact arm and lever are arranged with their axes of rotation axially parallel in a switching shaft or in a switching shaft segment.
Der drehbewegliche Hebel kann in der Ausführungsform "Einfachkontakt" einarmig oder zweiarmig ausgebildet sein. Der Hebel weist an seinem freien Ende eine zur Verklinkung mit dem Kontaktarm bestimmte Nase auf. Wie der Hebel kann auch der Kontaktarm einarmig oder zweiarmig ausgebildet sein.The rotatable lever may be formed in the embodiment "single contact" one-armed or two-armed. The lever has at its free end a certain latching with the contact arm nose. Like the lever, the contact arm can also be designed with one arm or two arms.
Bei einer einarmigen Ausbildung von Hebel und Kontaktarm sind Hebel und Kontaktarm jeweils so installiert, dass deren eine Arm in Richtung auf den Kontakt gelagert ist.In a one-arm design of lever and contact arm lever and contact are each installed so that one arm is mounted in the direction of the contact.
Bei einer zweiarmig Ausbildung von Hebel und Kontaktarm sind der zweiarmige Hebel und der zweiarmige Kontaktarm jeweils so installiert, dass deren erster Arm in Richtung auf den Kontakt und deren zweiter Arm in Gegenrichtung gelagert sind. Die in Gegenrichtung ausgebildeten zweiten Arme können gegenüber der Lage der ersten Arme abgewinkelt ausgebildet sein. Hebel und Kontaktarm sind also nicht in gestreckter Form vorhanden.In a two-armed design of lever and contact arm of the two-armed lever and the two-armed contact arm are each installed so that their first arm are mounted in the direction of the contact and the second arm in the opposite direction. The formed in the opposite direction of the second arms may be formed angled relative to the position of the first arm. Lever and contact arm are therefore not present in a stretched form.
Der Kontaktarm kann ein Fenster aufweisen, durch welches der Hebel hindurch greift. Diese Konstruktion hat den Vorteil, dass Kontaktarm und Hebel in einer Ebene, senkrecht zu ihren Drehpunkten angeordnet sein können. In einer anderen Ausbildung sind Kontaktarm und Hebel benachbart angeordnet. Hier sind zumindest Teile von Kontaktarm und Hebel außerhalb der genannten Symmetrieebene anzuordnen.The contact arm may have a window through which the lever engages. This construction has the advantage that contact arm and lever can be arranged in a plane perpendicular to their pivot points. In another embodiment, contact arm and lever are arranged adjacent. Here are at least parts of contact arm and lever to arrange outside of said symmetry plane.
Die Kontaktkraftfeder kann als Zugfeder, als Druckfeder, als Blattfeder oder als Spiralfeder ausgebildet sein.The contact force spring may be formed as a tension spring, as a compression spring, as a leaf spring or as a spiral spring.
Kontaktarm und/oder Hebel können je ein Halteelement aufweisen, an dem die Kontaktkraftfeder unverlierbar zwischen Kontaktarm und Hebel angelagert ist.Contact arm and / or lever may each have a holding element to which the contact force spring is permanently attached between the contact arm and lever.
In einer der Ausführungsformen befindet sich die Kontaktkraftfeder zwischen Kontaktarm und drehbeweglichem Hebel in Form einer Zug- oder einer Druckfeder. In einer weiteren Ausführungsformen wird beansprucht, dass die Kontaktkraftfeder einerends um einen Feder-Drehpunkt drehbeweglich angeordnet ist, und die Kontaktkraftfeder andernends (mit ihrem freien Ende) den Kontaktarm mit einem die Kontaktkraft erzeugenden Drehmoment beaufschlagt.In one embodiment, the contact force spring is located between the contact arm and the rotatable lever in the form of a tension spring or a compression spring. In a further embodiment, it is claimed that the contact force spring at one end is rotatably mounted about a spring pivot point, and the contact force spring at the other end (with its free end) acts on the contact arm with a torque generating the contact force.
In einer solchen Ausführungsform ist die Kontaktkraftfeder vorzugsweise als einschenklige Blattfeder ausgebildet. Eine solche Blattfeder weist etwa auf der Hälfte ihrer Länge eine Auswölbung auf, mit welcher eine Abstützung gegen den Kontaktarm eingerichtet ist. Das freie Ende der Blattfeder kann als Zunge ausgebildet sein, welche dem Kontaktarm (im verklinkten Zustand) anliegt.In such an embodiment, the contact force spring is preferably formed as einschenklige leaf spring. Such a leaf spring has about a half of its length on a bulge, with which a support against the contact arm is set up. The free end of the leaf spring may be formed as a tongue which abuts the contact arm (in the latched state).
Der Kontaktarm weist ein Halteelement auf, gegen welches sich die, insbesondere als Blattfeder ausgebildete Kontaktkraftfeder mindestens in der Verklinktstellung abstützt.The contact arm has a holding element, against which, in particular designed as a leaf spring contact force spring is supported at least in the Verklinktstellung.
Die oben erwähnten Aspekte, Leistungsmerkmale und Vorteile der Erfindung werden anhand der folgenden Beschreibung von Ausführungsbeispielen veranschaulicht, die zusammen mit folgenden Bildern zu lesen sind.
- FIG. 1A:
- schematische Darstellung einer ersten Ausführung bei EIN geschaltetem Kontaktsystem;
- FIG. 1B:
- schematische Darstellung einer ersten Ausführung bei AUS geschaltetem Kontaktsystem;
- FIG. 2:
- ein Kontaktsystem während einer elektrodynamisch veranlassten Öffnungsbewegung;
- FIG. 3:
- ein weiteres Kontaktsystem mit Zugfeder zwischen Bewegtkontaktarm und Hebel;
- FIG. 4:
- ein (erstes) Kontaktsystem mit Blattfeder als Kontaktkraftfeder;
- FIG. 5:
- ein (zweites) Kontaktsystem mit Blattfeder als Kontaktkraftfeder;
- FIG. 6:
- ein Kontaktsystem als Doppelunterbrecher;
- FIG. 7:
- eine Variante der ersten Ausführungsform;
- FIG. 8:
- eine Variante des weiteren Kontaktsystems;
- FIG. 9:
- eine weitere Variante der ersten Ausführungsform bei EIN geschaltetem Kontaktsystem;
- FIG. 10:
- die weitere Variante der ersten Ausführungsform bei AUS geschaltetem Kontaktsystem;
- FIG. 11:
- eine Variante des Kontaktsystems als Doppelunterbrecher.
- FIG. 1A:
- schematic representation of a first embodiment with ON switched contact system;
- FIG. 1B:
- schematic representation of a first embodiment with switched OFF contact system;
- FIG. 2:
- a contact system during an electrodynamically induced opening movement;
- FIG. 3:
- another contact system with tension spring between Bewegtkontaktarm and lever;
- FIG. 4:
- a (first) contact system with leaf spring as a contact force spring;
- FIG. 5:
- a (second) contact system with leaf spring as a contact force spring;
- FIG. 6:
- a contact system as a double breaker;
- FIG. 7:
- a variant of the first embodiment;
- FIG. 8th:
- a variant of the further contact system;
- FIG. 9:
- a further variant of the first embodiment with ON switched contact system;
- FIG. 10:
- the further variant of the first embodiment with OFF contact system;
- FIG. 11:
- a variant of the contact system as a double breaker.
Das Kontaktsystem für einen Niederspannungsschalter für mindestens einen Pol in einem Schaltergehäuse, in dem der Schalter betätigt werden kann, ist mit einem als Kontaktarm 10 ausgebildeten Bewegtkontakt ausgestattet. Dieser kann bei einem Einfachkontakt in einer ersten Ausführung einarmig und in einer zweiten Ausführung zweiarmig ausgebildet sein. Weiterhin wird ein Doppelunterbrecher (siehe
Ein drehbeweglicher Hebel 21 ist um einen Drehpunkt 23 gelagert und greift mit seinem freien (vorderen) Ende durch ein im Kontaktarm 10 ausgebildetes Fenster 16. An seinem Ende trägt der Hebel 21 eine Nase 24, welche in Richtung auf den Kontaktarm 10 ausgebildet ist. Hebel 21 und der Kontaktarm 10 sind über die Nase 24 miteinander verklinkt, solange sie nicht einer elektrodynamisch veranlassten Öffnungsbewegung unterworfen werden.A
Die Verklinktstellung wird bei einer elektrodynamisch veranlassten Öffnungsbewegung gelöst. Bekanntermaßen üben elektrische Gleich- oder Wechselströme ein magnetisches Feld auf stromleitende Pfade aus (Lorentz-Kräfte). Solche Kräfte werden insbesondere bei höheren Strömen, wie Überlast- oder Kurzschlussströmen, beim Öffnen eines Kontaktsystems ausgenutzt, wo diese Kräfte zur beschleunigten Öffnungsbewegung des Bewegtkontakts 10 beitragen.The Verklinktstellung is solved in an electrodynamically induced opening movement. As is known, electrical direct or alternating currents exert a magnetic field on current-conducting paths (Lorentz forces). Such forces are utilized in particular at higher currents, such as overload or short-circuit currents, when opening a contact system, where these forces contribute to the accelerated opening movement of the moving
Nicht dargestellt ist, dass der Festkontaktträger (8) U-förmig - als Leiterschleife - ausgebildet sein kann und mit einem Anschlussleiter oder einer Anschlussklemme versehen sein kann.It is not shown that the fixed contact carrier (8) U-shaped - can be designed as a conductor loop - and can be provided with a connection conductor or a terminal.
Die
Die Kontaktkraftfeder 19 - hier als Druckfeder ausgestaltet - ist allein zwischen dem Kontaktarm 10 und dem Hebel 21 angeordnet. Gegenüber sonst bekannten Kontaktsystemen stützt sich die Kontaktkraftfeder nicht in der Schaltwelle oder andernorts im Gehäuse ab.The contact force spring 19 - designed here as a compression spring - is arranged solely between the
Die Lage der Drehpunkte (23, 12) von Hebel 21 und Kontaktarm 10, diejenigen der Angriffspunkte der Kontaktkraftfeder 19 am Hebel 21 und am Kontaktarm 10 und die durch die Kontaktkraftfeder (Druckfeder) 19 vermittelten Kräfte liefern rechts- und linksdrehende Drehmomente. Die Resultante aller Drehmomente in der verklinkten Stellung, zum Beispiel in der Geschlossenstellung, des Kontaktsystems ist (bezüglich der Zeichnung) ein rechtsdrehendes Moment, welches als Kontaktkraft auftritt. Der Hebel 21 ist über die endseitig vorhandene Nase 24 mit dem Kontaktarm 10 verklinkt. Nach Öffnen des Kontakts durch Aufschleudern bei elektrodynamischer Kraftentwicklung bei einem Überstrom löst sich die Verklinkung.The position of the fulcrums (23, 12) of
Hierdurch zeigt sich ein wesentlicher Vorteil der Erfindung beim Lösen der Verklinkung, da die wesentliche Kraftentfaltung der Kontaktkraftfeder nur in der Geschlossenstellung des Kontakts und während der Öffnung beim Aufschleudern durch elektrodynamische Kraftentwicklung auftritt. Ein Wiederzufallen des Kontakts über die Wirkung der Kontaktkraftfeder kann nach dem Entklinken nicht auftreten.This shows a significant advantage of the invention when releasing the latch, since the substantial force development of the contact force spring occurs only in the closed position of the contact and during the opening during spin-coating by electrodynamic force development. A reoccurrence of the contact on the effect of the contact force spring can not occur after unlatching.
Der Kontaktarm 10 weist ein Halteelement auf (siehe besonders die Bezugszeichen 11 und 20 in
Die Verklinkung zwischen drehbeweglichem Hebel und Kontaktarm wird dadurch erreicht, dass der Hebel an seinem freien Ende eine zur Verklinkung mit dem Kontaktarm 10 bestimmte Nase 24 aufweist. Die Verklinkungsstelle im oder am Kontaktarm kann ein Widerlager, ein Zapfen oder eine Kante sein. Vorzugsweise und gemäß
Neben Anordnungen, in denen das freie Ende des Hebels durch ein Fenster im Kontaktarm greift, können Konstruktionen vorgesehen sein, bei denen der Hebel am Kontaktarm vorbei beweglich angeordnet ist. Wesentlich an der Erfindung ist, dass im normalen Betrieb des Kontakts eine Verklinkung von Hebel 21 und Kontaktarm 10 vorhanden ist.In addition to arrangements in which the free end of the lever engages through a window in the contact arm, constructions may be provided in which the lever past the contact arm is movably arranged. Essential to the invention is that in the normal operation of the contact a latching of the
Beschrieben sind zuvor Ausführungsformen, bei denen der Hebel von unten durch das Fenster 16 im Kontaktarm auf den Kontaktarm 10 greift (vgl.
Die
Die Schaltwelle 13 behält ihre Stellung bei der beschriebenen Öffnungsbewegung, sie wird nicht mitbewegt. Die Nase 24 am Hebel 21 verliert die Auflage am Kontaktarm und verlässt die Verklinktstellung. Die Kraftwirkung der Druckfeder 19 schleudert den Kontaktarm in seine volle Offenstellung. Mit Bezugszeichen 14' sind Anschläge eingezeichnet gegen die der Hebel zurückfällt, bzw. sich abstützt. Ein besonderes Merkmal der Erfindung besteht darin, dass auf den Kontaktarm keine rückdrehenden Kräfte auftreten und das Kontaktsystem nicht wieder schließt. Viele Niederspannungsschalter mit Kontaktkraftfeder sind konstruktiv so ausgebildet, dass die kontaktschließende Wirkung der Kontaktkraftfeder nach Öffnung des Kontakts vorhanden ist und vorhanden bleibt. Federn oder Prellen des Systems würden durch die kontaktschließende Federkraft den Kontakt wieder schließen.The switching
Nur in selten auftretenden Kurzschlussfällen schleudert der Kontakt auf und entklinkt. Der Hebel verklinkt wieder mit dem Kontaktarm während des Spannens (Reset) des Kontaktsystems nach elektrodynamisch veranlasster Öffnung. Beim Reset-Vorgang (Spannen) wird die Schaltwelle (über Mitnehmer und/oder Handhabe 7) des Kontaktsystems in Linksdrehung versetzt, was der AUS-Schaltbewegung entspricht. Dabei nimmt der Anschlag 14' den Hebel 21 in Linksdrehung mit, während der Kontaktarm am (äußeren) Anschlag 14 anliegt. Dabei verlagern sich die Drehpunkt-Orte (23, 12) von Hebel und Kontaktarm derart, dass bei dieser Bewegung das Vorderende des Hebels durch das Fenster 16 des Kontaktarms geschoben wird. Der Abstand der Drehpunkte 12 und 23 verkürzt sich, so dass die Nase 24 des Hebels 21 wieder zur Auflage von oben auf den Kontaktarm gelangt.Only in rarely occurring cases of short-circuit hurls the contact and unlatched. The lever engages again with the contact arm during the tensioning (reset) of the contact system after electrodynamically induced opening. During the reset process (clamping), the selector shaft (via driver and / or handle 7) of the contact system is turned to the left, which corresponds to the OFF switching movement. In this case, the stop 14 'takes the
Nach diesem Reset-Vorgang kann das Kontaktsystem wieder in EIN-Stellung überführt werden. Am Ende der Reset-Bewegung kommt der Kontaktarm mit dem Bewegtkontaktstück auf dem Festkontakt (Festkontaktstück) zu liegen (wieder wie in
Die
Das Vorderende 24 des Hebels liegt auf dem Kontaktarm 10. Die hier als Zugfeder 18 ausgestaltete Kontaktkraftfeder erzeugt die Kontaktkraft. Wie in der zuvor beschriebenen Ausgestaltung liefern die Kräfte der Kontaktkraftfeder 18 mit den Drehpunkten (23, 12) am Hebel 22 und am Kontaktarm 10 ein rechtsdrehendes Drehmoment als Kontaktkraft in der Schließstellung.The
In der
In der
Schließlich wird in der
Auch in dieser Ausführungsform befinden sich die drehbeweglichen Hebel 21' in Normalstellung mit dem Kontaktarm 10' in einer Verklinktstellung und verlassen veranlasst durch elektrodynamische Öffnung die Verklinktstellung. Nach einem Reset-Vorgang gelangen die drehbeweglichen Hebel 21' wiederum in die Verklinktstellung. Am Ende der Reset-Bewegung kommt der Kontaktarm mit dem Bewegtkontaktstück auf dem Festkontakt (Festkontaktstück) zu liegen (wieder wie in
Die Funktion der Erfindung nach
Die
In der
In der
Den vorgenannten Ausführungsformen ist gemeinsam, dass sich der oder die drehbeweglichen Hebel bei 'normalem' Kontakt öffnen oder schließen mit dem Kontaktarm in einer Verklinktstellung befinden. Hebel und Kontaktarm verlassen - durch elektrodynamische Öffnung veranlasst - die Verklinktstellung. Nach einem Reset-Vorgang gelangen der oder die Hebel wiederum in die Verklinktstellung.The aforementioned embodiments have in common that the one or more rotatable levers in 'normal' contact open or close with the contact arm are in a Verklinktstellung. Leave lever and contact arm - caused by electrodynamic opening - the Verklinktstellung. After a reset process, the or the Lever again in the Verklinktstellung.
Mit Kontaktsystemen nach
- 66
- DoppelunterbrecherDouble breaker
- 77
- Handhabe (Griffhebel, Betätigung Schaltwelle)Handle (handle lever, operating selector shaft)
- 88th
- Festkontaktstück und LaufschieneFixed contact piece and running rail
- 1010
- Kontaktarm mit BewegtkontaktstückContact arm with moving contact piece
- 10'10 '
- Kontaktarm DoppelunterbrecherContact arm double breaker
- 10"10 "
- doppelarmiger Kontaktarm zu Einfachkontaktdouble-arm contact arm to single contact
- 10A; 10B10A; 10B
-
erster und zweiter Arm von Kontaktarm 10"first and second arm of
contact arm 10 " - 1111
- Haken für Feder an KontaktarmHook for spring on contact arm
- 1212
- Drehzapfen KontaktarmTrunnion contact arm
- 1313
- Schaltwelleshift shaft
- 1414
- Anschlag für KontaktarmStop for contact arm
- 14'14 '
- Anschlag für HebelStop for lever
- 1515
- DurchhubspaltDurchhubspalt
- 1616
- Fenster im KontaktarmWindow in the contact arm
- 18; 18"18; 18 "
- Kontaktkraftfeder auf ZugContact force spring on train
- 19"19 "
-
Kontaktkraftfeder zu Hebel 22" und Kontaktarm 10"Contact force spring to lever 22 "and
contact arm 10" - 19; 19'19; 19 '
- Kontaktkraftfeder auf DruckContact force spring on pressure
- 2020
- Haken an Hebel für FederHook on lever for spring
- 21; 21'21; 21 '
- Hebel drehbeweglich (Eingriff von unten)Lever rotatable (engagement from below)
- 2222
- Hebel drehbeweglich (Eingriff von oben)Lever rotatable (engagement from above)
- 21", 22"21 ", 22"
- doppelarmiger Hebeldouble-armed lever
- 22A; 22B22A; 22B
-
erster und zweiter Arm von Hebel 22"first and second arm of
lever 22 " - 2323
- Drehpunkt (Drehachse) HebelPivot (rotation axis) lever
- 2424
- Haken oder Nase (vorn) an Hebel/BlattfederHook or nose (front) on lever / leaf spring
- 27; 27'27; 27 '
- drehbeweglicher Hebel als einarmige Blattfederrotatable lever as a one-armed leaf spring
- 2828
- Auswölbung an BlattfederBulge on leaf spring
- 3030
- Mitnehmer für Blattfeder an KontaktarmDriver for leaf spring on contact arm
- 4040
- Litzebraid
- 4141
- Langlochführung des Drehzapfens von KontaktarmSlot guide of the pivot pin of contact arm
- 42; 42'42; 42 '
- Auslöseelementtriggering element
- 43; 43'43; 43 '
- Querstegcrosspiece
- 4545
- Mitnehmertakeaway
- 4747
- Schwenkachseswivel axis
- BB
- Bewegungsrichtung Handhabe/SchaltwelleDirection of movement handle / stem
- D; D'D; D '
- Auslöserichtungtripping direction
Claims (20)
- Contact system for a low voltage switch, equipped with a movable contact in the form of a contact arm (10), which is biased by a contact force spring (18, 18", 19, 19") in order to generate a contact pressure in the closed position, and mounted in a switch housing for at least one pole, in a rotatable manner about a contact arm rotation point (12), in which housing the low-voltage switch can be actuated,
characterised in that- the contact force spring (18, 18", 19, 19") is arranged between a contact arm (10, 10") and a lever (21, 21", 22, 22") which is arranged to rotate around a lever rotation point (23),- wherein the position of the contact arm rotation point (12) and the position of the lever rotation point (23) and the lengths of the lever (21, 21", 22, 22") and of the contact arm (10, 10") are dimensioned with respect to each other such that the contact pressure of the contact force spring (18, 18, 19) generated on the contact arm (10, 10") results in a contact system closing torque, and- wherein the rotatable lever (21, 21", 22, 22") and the contact arm (10, 10") latch to each other when the switch is activated in any position of the contact system. - Contact system according to claim 1, characterised in that the lever (21, 21", 22, 22") and the contact arm (10, 10") unlatch when an opening movement is electrodynamically actuated.
- Contact system according to claim 1 or 2, characterised in that the lever (21, 21", 22, 22") and the contact arm (10, 10") unlatch when impinged by a triggering element (D).
- Contact system according to one of the preceding claims, characterised in that after unlatching during a reset of the contact system, the lever (21, 21", 22, 22") and contact arm (10, 10") relatch.
- Contact system according to one of the preceding claims, characterised in that the contact arm (10, 10") and lever (21, 22, 22") are arranged with their axes of rotation (12, 23) parallel in a switching shaft (13) or in a switching shaft segment.
- Contact system according to one of the preceding claims, characterised in that the lever (21, 22) is formed as a single arm and comprises, at the free end of same, a specific lug (24) for latching with the contact arm (10).
- Contact system according to one of the preceding claims, characterised in that the lever (21, 22) and the contact arm (10) are each formed as a single arm, and lever (21, 22) and contact arm (10) are each installed such that the single arm thereof is mounted in the direction of the contact.
- Contact system according to one of the preceding claims, characterised in that the lever (21", 22") and the contact arm (10") are each formed with two arms and the two-armed lever (21", 22") and the two-armed contact arm (10") are each installed such that the first arm (21A, 22A, 10A) thereof is mounted in the direction of the contact and the second arm (21B, 22B, 10B) thereof is mounted in the opposite direction.
- Contact system according to the preceding claim, characterised in that the contact force spring (18", 19") is installed between both second arms (20B, 21B, 10B).
- Contact system according to one of the preceding claims, characterised in that the contact arm (10, 10") comprises a window (16) through which the lever (21, 22, 22", 27) extends.
- Contact system according to one of the preceding claims, characterised in that the contact force spring is designed as a tension spring (18, 18), compression spring (18, 19), leaf spring (27, 27') or coil spring.
- Contact system according to one of the preceding claims, characterised in that contact arm (10, 10") and/or lever (21, 21", 22, 22") each comprise a retaining element (11, 20) on which the contact force spring (18, 18", 19) is mounted in a captive manner between contact arm (10, 10") and lever (21, 21", 22, 22").
- Contact system according to one of the preceding claims, characterised in that the contact system is formed as a double contact breaker, wherein the contact arm (10') is formed as a two-armed symmetric movable contact (10') mounted rotatably in its centre (12), and a rotatable lever (21') is arranged on each side of the contact arm (10'), and in each case a contact force spring (19') is arranged between one side of the contact arm (10') and one of the rotatable levers (21'), wherein the rotatable levers (21') and the contact arms (10') are latched to each other when the switch is activated in any position of the contact system.
- Contact system according to claim 13, characterised in that the levers (21') and the contact arms (10') unlatch when an opening movement is electrodynamically actuated and in that during a reset movement of the contact system, the lever (21') and contact arm (10') relatch.
- Contact system according to claim 13, characterised in that the levers (21') and the contact arms (10') unlatch when impinged by a triggering element (42') and in that during a reset movement of the contact system, the lever (21') and contact arm (10') relatch.
- Contact system for a low voltage switch, equipped with a movable contact in the form of a contact arm (10), which is biased by a contact force spring (27, 27') in order to generate a contact pressure in the closed position, and mounted in a switch housing for at least one pole, in a rotatable manner about a contact arm rotation point (12), in which housing the switch can be actuated- wherein the contact force spring (27, 27') is arranged to rotate around a spring rotation point (23'), and the contact force spring (27, 27') impinges the contact arm (10) with a torque creating the contact force,- wherein the position of the contact arm rotation point (12) and the position of the spring rotation point (23') and the lengths of the contact arm (10) and of the contact force spring (27, 27') are dimensioned with respect to each other such that the contact pressure of the contact force spring (27, 27') generated on the contact arm (10) results in a contact system closing torque, and- wherein the contact force spring (27, 27') and the contact arm (10) latch to each other when the switch is activated in any position of the contact system,characterised in that- the contact force spring (27, 27') and the contact arm (10) unlatch when an opening movement is electrodynamically actuated, and- the contact arm (10) comprises a window (16), through which the contact force spring (27, 27') extends.
- Contact system according to claim 16, characterised in that the contact force spring (27, 27') and the contact arm (10) relatch during a reset movement of the contact system.
- Contact system according to claim 16 or 17, characterised in that the contact force spring (27, 27') is formed as a single limb and mounted to rotate about the spring rotation point (23').
- Contact system according to claims 16 to 18, characterised in that the contact force spring is formed as a leaf spring (27, 27').
- Contact system according to one of claims 14 to 19, characterised in that the contact arm (10) comprises a retaining element (30) against which the contact force spring (27, 27'), formed in particular as a leaf spring, is supported at least in a latching position.
Applications Claiming Priority (2)
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DE102012108849 | 2012-09-20 | ||
PCT/EP2013/069433 WO2014044739A1 (en) | 2012-09-20 | 2013-09-19 | Circuit breaker contact system |
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Publication Number | Publication Date |
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EP2898525A1 EP2898525A1 (en) | 2015-07-29 |
EP2898525B1 true EP2898525B1 (en) | 2017-04-26 |
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EP13771417.6A Not-in-force EP2898525B1 (en) | 2012-09-20 | 2013-09-19 | Circuit breaker contact system |
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WO (1) | WO2014044739A1 (en) |
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CN114188175B (en) * | 2021-10-21 | 2023-09-05 | 合肥联宝信息技术有限公司 | Trigger switch and electronic device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1553328A (en) * | 1967-01-30 | 1969-01-10 | ||
DE2851817C3 (en) | 1978-04-19 | 1984-10-18 | Siemens AG, 1000 Berlin und 8000 München | Low-voltage circuit breaker with a main pawl, an intermediate pawl and a locking element |
ZA783171B (en) * | 1978-06-02 | 1979-09-26 | Heinemann Electric Ltd | Improvements relating to electrical switches |
DE3818864A1 (en) | 1988-06-03 | 1989-12-14 | Kloeckner Moeller Elektrizit | Current interrupter with an arc bounding device |
DE4222965C1 (en) * | 1992-07-13 | 1993-11-25 | Kloeckner Moeller Gmbh | Contact system for electrical power switching of load and safety devices - has movable contacts on carriers with spring elements to provide snap action operating forces |
-
2013
- 2013-09-19 EP EP13771417.6A patent/EP2898525B1/en not_active Not-in-force
- 2013-09-19 WO PCT/EP2013/069433 patent/WO2014044739A1/en active Application Filing
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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WO2014044739A1 (en) | 2014-03-27 |
EP2898525A1 (en) | 2015-07-29 |
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