EP1523020A1 - Switching device with a single break rotary contact - Google Patents

Switching device with a single break rotary contact Download PDF

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Publication number
EP1523020A1
EP1523020A1 EP04024128A EP04024128A EP1523020A1 EP 1523020 A1 EP1523020 A1 EP 1523020A1 EP 04024128 A EP04024128 A EP 04024128A EP 04024128 A EP04024128 A EP 04024128A EP 1523020 A1 EP1523020 A1 EP 1523020A1
Authority
EP
European Patent Office
Prior art keywords
contact
switching device
lever
switching
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04024128A
Other languages
German (de)
French (fr)
Other versions
EP1523020B1 (en
Inventor
Franz Böder
Stefan Michel
Matthias Schaar
Hagen Trinks
Robert Protz
Ines Werner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Electrical IP GmbH and Co KG
Original Assignee
Moeller GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP1523020A1 publication Critical patent/EP1523020A1/en
Application granted granted Critical
Publication of EP1523020B1 publication Critical patent/EP1523020B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a switching device with easy interrupting rotary contact in particular for a multi-pole low-voltage switch-disconnector according to the preamble of Main claim.
  • a generic switching device is known from WO03-050835 A1. It is about around a multi-pole low-voltage switch-disconnector with an insulating material housing, in the two chambers are formed, of which a first chamber as a quenching chamber and a second chamber of comparable volume acts as a connection chamber.
  • An easy one interrupting rotary contact is movable in a camp, the rotary contact as two-armed Is formed lever whose first lever arm carries a contact piece, which with a Fixed contact on a first power supply rail in switching contact comes.
  • the second lever arm of the rotary contact is connected to a flexible conductor, which is in conductive connection with a second power supply rail is.
  • Switching devices of the type described have the disadvantage that the contact force of the springs developed contact forces are not always sufficient secure contact of the contact pieces especially at high currents to effect.
  • connection chamber an electromagnetically acting Contact force amplifying means is arranged, which the second contact arm including the attachment point of the flexible conductor is closely adjacent, preferably the second contact and the attachment point of the flexible conductor overlaps.
  • the the switching device flowing current generates a magnetic field, which is from the magnetizable Material existing contact force amplifying agent is compressed in such a way, so that an attractive effect is exerted on the second lever arm, whereby the contact force between Fixed and moving contact is increased. An undesirable contact separation, in particular at increased currents is counteracted.
  • the contact force reinforcing agent is preferably formed as a trough or U-shaped yoke.
  • connection chamber allows the installation of the invention Magnet body and the mobility with large Winkelweg the second lever arm of the contact lever.
  • connection chamber In the large-area connection chamber is sufficient space for the magnetic body, bringing a Simplification of installation is achieved.
  • the arrangement according to the invention has the advantage that the magnetic field used far from the arc quenching device is effective and the magnetic field is good is shielded from this. There is no influence on the arc quenching.
  • the arrangement according to the invention on the second lever arm the contact lever, the torque of the power amplification can be made large.
  • the second lever arm there is no particular restriction on location of the arrangement or Length of the lever arm.
  • the details of the switching device - without limiting the claimed subject matter thereto - may consist of the following:
  • the switching device is in particular for a multi-pole switch disconnector with insulating material housing and includes a simple interrupting rotary contact, with a, each pole associated switching drive, which in a bearing in the insulating housing about an axis perpendicular to the longitudinal extent of the rotary contact is rotatably mounted.
  • the actual switch consists of a fixed, with a busbar connected contact piece, a stored in a shift shaft, two-armed, not necessarily symmetrical lever arm with a contact piece, which in Switching contact comes with a fixed contact piece.
  • the contact lever may be formed asymmetrically with respect to the lever arms, wherein the second lever arm to attack the electromagnetic contact force gain may be longer as the first lever arm.
  • Two trained as tension springs contact springs are based behind a nose on the contact lever and practice each - in a known manner - a directed in closing movement torque on the contact.
  • the contact springs have their support in the switching shaft.
  • the contact springs are in pairs on both sides of the contact lever shape and Power exercised symmetrical.
  • the support member of each contact pressure spring is as formed to the shift shaft parallel-lying web and otherwise are the contact pressure springs formed in pairs symmetrically on both sides of the web.
  • the switching shaft is connected to a drive device in combination, which includes a switching mechanism and a Hand actuator has - see schematically in FIG. 2.
  • a drive device in combination, which includes a switching mechanism and a Hand actuator has - see schematically in FIG. 2.
  • the switch lock with triggers in connections for example, overcurrent release or an undervoltage release can be called.
  • the contact force reinforcing means is as a trog or U-shaped magnetizable piece of material educated. It according to one embodiment is mounted in the upper region of the connection chamber. The position in the upper area is not the only possible, as this of the arrangement the switching contacts is determined. A reversal of the situation depending on the reversal of the Rotary movement of the contact and the change in the position of the switching contacts in the switch contact space is also an inventive arrangement.
  • the piece of material partially overlaps or entirely with its trough side surfaces, the second contact arm in the connection chamber including the attachment point of the flexible conductor.
  • the magnet piece be formed so long that it still overlaps a portion of the flexible conductor.
  • the contact lever is substantially rotationally symmetrical about 180 °. At the contact lever are arranged between its pivot point and the Hebelarmenden driving surfaces, the can be acted upon by the drive of the switching device. In a simple design can the axle receiving bore of the contact lever be a normal circular bore.
  • an axle receiving bore in the form of a slot - instead of a likewise possible simple bore - formed.
  • the longitudinal extent of the Langloch is parallel to a circle with a center that is approximately in the point of contact of the moving contact piece with the fixed contact piece falls.
  • the axial displacement in the Slot can have an amount of about 300 microns.
  • the opening movement is supported by a forced Displacement of the lever arm with respect to the driving surfaces on the contact lever.
  • the lever arm extends in the direction of a greater distance from the contact pieces.
  • a material in the quenching chamber in the vicinity of the opening distance of the contact a material can be arranged which releases arc-quenching gas.
  • materials are made of plastic, are added to the admixtures, when heated by eliminate the arc gases.
  • the material may be in the form of at least one plate-shaped Insert be introduced positively on both sides of the opening section.
  • a low-voltage switch-disconnector is shown.
  • the Figures show an example of a switching device with a Isolierstoffgeophuse 2.
  • the insulating material has a rotatable in a bearing about a fixed transverse axis shift shaft 90, wherein the transverse axis is perpendicular to the longitudinal direction of each pole.
  • the pole includes one fixed contact 9 'connected to a first power connection rail 20'
  • the contact lever 80 is rotationally symmetrical about 180 ° and has two opposite ones Lever arms 81, 82 which extend along the longitudinal axis of the pole and the Steering shaft 90 penetrate.
  • the movable contact piece 9 "on the first lever arm 81 of the contact lever 80 occurs with him opposite fixed contact piece 9 'in switching contact.
  • a (schematically drawn) flexible conductor (pigtail) 22 firmly connected.
  • the pigtail 22 conducts to the second power connection rail 20 "and has there her second attachment point 22 "(solder joint).
  • An essential feature of the invention is the formation of two chambers in Isolierstoffgeophuse.
  • the first chamber quenching chamber 40
  • the first lever arm 81 moves
  • the second chamber here referred to in the text as a connection chamber 50
  • the connection chamber 50 accommodates the movement of the second lever arm inclusive the attached to him flexible conductor 22.
  • the magnetic body 30 arranged as the electromagnetically acting contact force amplifying means serves.
  • a package of sheets extinguishing device 42 may in the Extinguishing chamber 40 in the vicinity of the opening distance of the contact an arc extinguishing Material arranged.
  • This material is intended to release arc-quenching gases.
  • Such Materials are known in the art. They are usually made of plastic, whose Additions when heated by the arc precipitate gases.
  • the material can be in Shape at least one plate-shaped insert on both sides of the opening path (way of the contact piece 9 ") in the insulating material housing can be positively inserted in the present embodiment is relatively short, supports the gas-releasing Material the extinction of an arc.
  • the material can be modular in the form of two platelets be formed, which can be inserted in guide grooves on the housing inner wall.
  • the connecting rails 20 'and 20 can be seen.
  • the connecting rails are preferably in the device housing by injection molding embedded embedded.
  • an insert body (Rivet) made of ferromagnetic material is inserted. Through the hole is the current path spread apart before the fixed contact and the ferromagnetic rivet changes the structure the magnetic field in the immediate vicinity of the switch contact. The movement of a Forming arc promoted towards the extinguishing device or in this.
  • the magnetic body 30 is, for example, magnetizable steel. He is in the upper Area of the connection chamber 50 via screws 38 passing through mounting holes 39 grab, fastened.
  • the magnetic body has the shape of a downwardly open magnetic yoke. In which in the bottom of the magnetic yoke serving as a mounting surface 31 (trough bottom) transverse leg lies. At the bottom of the trough are downwardly directed trough side surfaces 32 right and left educated.
  • the trough bottom opens trapezoidal in the area directed to the contact lever, because there he overlaps the pigtail, which occupies a greater width than the second contact arm.
  • the narrow side of the trapezoid lies on the contact lever side and the broad side of the trapezoid lies contact lever away. In the remote from the contact lever area of the trough bottom is rectangular.
  • the trough side surfaces overlap the second lever arm and the attachment point (Solder joint) 22 "of the flexible conductor in the closed position of the switching arrangement Magnetic yoke is preferably formed as large as possible to the largest possible to achieve magnetic flux. This can be achieved simply because the spatial Possibilities of the connection chamber are well exploitable.
  • the trough side surfaces 32 can also overlap a large part of the flexible conductor. In the region of the overlap with the second contact arm, they have a first region / in which the side flanks 32a widen in the direction of the pigtail 22. 3. The center of the area / corresponds approximately to the middle of the position of the attachment point 22 "of the flexible conductor on the lever arm 81. The area / the trough side surfaces 32 forms a rising side flank 32a and leaves This region II - here referred to as the back flank 32b - has approximately the same length as the largest length of the side flank 32a The region II engages over a portion of the free pigtail and acts as a shield between the magnetic fields of the pigtails of adjacent poles.
  • the trough bottom 31 of the magnetic body is extended in the direction of the power supply rail by a region III - here referred to as extension region 36. At the area III there are no side flanks.
  • the extension area has the effect that the attractive force of the magnetic yoke can also be effective on the pigtail.
  • the contacts work off and the stroke changes. This also changes the position of the second switching arm in the magnetic body and the effective magnetic force amplification depending on the current lift.
  • Shape (length, Oblique formation) and position of the side edges 32a are preferably chosen so that over the life of the switching device, the magnetic force amplification increases to at possible end of life to reach the maximum possible value.
  • the contact lever 80 is shown in FIGS. 5 and 6. He is 180 ° rotationally symmetrical about his Rotary axis formed. On him are between his fulcrum 7 and the Hebelarmenden Mit scenic lake 86, 87 arranged by the drive of the switching device (switching shaft segments 92, 93) are acted upon.
  • an axle receiving bore 120 is formed in the form of a slot.
  • the diameter D has the smallest possible tolerance.
  • the longitudinal axis of the slot lies on a circle with the center M, so that the angle W is 90 °.
  • the longitudinal axis of the slot 120 is greater than the transverse axis D of the slot by an amount E of 300 ⁇ m +/- 50 ⁇ m.
  • the lever arm relationship is shown schematically in FIG. 6 drawn.
  • the contact lever When closing the contact after the first contact the slot is applied to the axis of the switching shaft segment 92,93; the contact lever is off-center. During the opening movement of the shift shaft segment, this strikes the driver surface 87 on the off-center contact lever and initiates a force action in the welding zone at M until the shift shaft segment strikes the opposite stop and lifts the contact. It is an axial clearance E possible, which causes the change in the lever arm relationship.
  • the attack of the opening forces or torques of the drive of the switching device (switching shaft segments 92,93) changed in such an attack position that the long lever arm H on the cam surface 87 is effective and the opening torque is significantly increased.
  • At location and shape of the slot is essential that an oblique employment of the slot is present with respect to the longitudinal axis of the contact lever.
  • the intended effect is supported by an oblique orientation of the contact force springs with respect to their longitudinal Force effect, i. the line of force between the points of attack of the corresponding Contact force spring at the associated points of attack, or lever arms of the contact and on the switching shaft or the switching shaft segment, with respect to the longitudinal axis of the contact arm as well as the course of the slot.
  • the opening movement (in the direction of arrow R) supported be by a forced displacement of the lever arm with respect to the driver surfaces on the contact lever.
  • a shield plate 60th arranged, which is drawn in Fig. 8.
  • the shield plate its position in the selector shaft can also be seen in Fig. 1, reduces the cross section for the passage of arc gases from the contact chamber 40 in the connection chamber 50. This can be a faster Achieve pressure build-up in the contact chamber. The build-up of pressure acts on the resulting Arc and blows him in the direction of the discharge opening 44 of the contact chamber. This advantageously works an accelerated separation of the arc from the fixed contact piece 9 '.
  • the Shield 60 has the shape of a rectangle. Inside the rectangular shape is a window 68 for the passage of the contact lever available.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Abstract

The switching device has an insulating housing provided with an arc extinction chamber and a termination chamber of similar volume and a rotary contact in the form of a 2-armed lever (80), having a first lever arm (81) provided with a contact piece (9') cooperating with a stationary contact (9'') of a first current rail (20') and a second lever arm (82) connected via a flexible conductor (22) with a second current rail (20''). The termination chamber contains an electromagnetic device (30) for amplification of the contact force, cooperating with the second lever arm in the closed position of the contact piece.

Description

Die Erfindung betrifft eine Schaltvorrichtung mit einfach unterbrechendem Drehkontakt insbesondere für einen mehrpoligen Niederspannungs-Lasttrennschalter nach dem Oberbegriff des Hauptanspruchs.The invention relates to a switching device with easy interrupting rotary contact in particular for a multi-pole low-voltage switch-disconnector according to the preamble of Main claim.

Eine gattungsgemäße Schaltvorrichtung ist aus der WO03-050835 A1 bekannt. Es handelt sich um einen mehrpoligen Niederspannungs-Lasttrennschalter mit einem Isolierstoffgehäuse, in dem zwei Kammern ausgebildet sind, von denen eine erste Kammer als Löschkammer und eine zweite Kammer mit vergleichbarem Volumen als Anschlusskammer fungiert. Ein einfach unterbrechender Drehkontakt ist in einem Lager beweglich, wobei der Drehkontakt als zweiarmiger Hebel ausgebildet ist, dessen erster Hebelarm ein Kontaktstück trägt, welches mit einem Festkontakt an einer ersten Stromanschlussschiene in Schaltberührung kommt. Der zweite Hebelarm des Drehkontakts ist mit einem flexiblen Leiter verbunden, der in leitender Verbindung mit einer zweiten Stromanschlussschiene steht. Es sind Kontaktkraftfedern vorhanden, die am Drehkontakt und einer Schaltwelle oder einem Schaltwellensegment angreifen.A generic switching device is known from WO03-050835 A1. It is about around a multi-pole low-voltage switch-disconnector with an insulating material housing, in the two chambers are formed, of which a first chamber as a quenching chamber and a second chamber of comparable volume acts as a connection chamber. An easy one interrupting rotary contact is movable in a camp, the rotary contact as two-armed Is formed lever whose first lever arm carries a contact piece, which with a Fixed contact on a first power supply rail in switching contact comes. The second lever arm of the rotary contact is connected to a flexible conductor, which is in conductive connection with a second power supply rail is. There are contact force springs available on the Rotary contact and a switching shaft or a switching shaft segment attack.

Schaltvorrichtungen der beschriebenen Art haben den Nachteil, dass die von den Kontaktkraftfedern entwickelten Andruckkräfte nicht immer ausreichen eine sichere Kontaktierung der Kontaktstücke insbesondere bei hohen Strömen zu bewirken.Switching devices of the type described have the disadvantage that the contact force of the springs developed contact forces are not always sufficient secure contact of the contact pieces especially at high currents to effect.

Aufgabe der Erfindung ist es, eine Schaltanordnung anzugeben, bei der der genannte Nachteil vermieden wird.The object of the invention is to provide a switching arrangement in which said disadvantage is avoided.

Die Lösung der Aufgabe findet sind in den Merkmalen des Hauptanspruchs, wobei bevorzugte Ausbildungsformen in den Unteransprüchen formuliert sind.The solution of the problem can be found in the features of the main claim, wherein preferred Forms of training are formulated in the subclaims.

Kern der Erfindung besteht darin, dass in der Anschlusskammer ein elektromagnetisch wirkendes Kontaktkraftverstärkungsmittel angeordnet ist, welches dem zweiten Kontaktarm einschließlich der Befestigungsstelle des flexiblen Leiters eng benachbart ist, vorzugsweise den zweiten Kontaktarm und die Befestigungsstelle des flexiblen Leiters übergreift. Der die Schaltvorrichtung durchfließende Strom erzeugt ein Magnetfeld, welches vom aus magnetisierbarem Werkstoff bestehenden Kontaktkraftverstärkungsmittel in der Weise verdichtet wird, so dass eine anziehende Wirkung auf den zweiten Hebelarm ausgeübt wird, womit die Kontaktkraft zwischen Fest- und Bewegtkontakt erhöht wird. Einer unerwünschten Kontakttrennung, insbesondere bei erhöhten Stromstärken wird entgegengewirkt. Das Kontaktkraftverstärkungsmittel ist vorzugsweise als trog- oder U-förmiges Joch ausgebildet.Essence of the invention is that in the connection chamber an electromagnetically acting Contact force amplifying means is arranged, which the second contact arm including the attachment point of the flexible conductor is closely adjacent, preferably the second contact and the attachment point of the flexible conductor overlaps. The the switching device flowing current generates a magnetic field, which is from the magnetizable Material existing contact force amplifying agent is compressed in such a way, so that an attractive effect is exerted on the second lever arm, whereby the contact force between Fixed and moving contact is increased. An undesirable contact separation, in particular at increased currents is counteracted. The contact force reinforcing agent is preferably formed as a trough or U-shaped yoke.

Das Vorhandensein einer großräumigen Anschlusskammer erlaubt den Einbau des erfindungsgemäßen Magnetkörpers und die Beweglichkeit mit großem Winkelweg des zweiten Hebelarms des Kontakthebels.The presence of a spacious connection chamber allows the installation of the invention Magnet body and the mobility with large Winkelweg the second lever arm of the contact lever.

In der großräumigen Anschlusskammer ist ausreichend Platz für den Magnetkörper, womit eine Vereinfachung des Einbaus erreicht wird.In the large-area connection chamber is sufficient space for the magnetic body, bringing a Simplification of installation is achieved.

Es ist bekannt, kraftverstärkende, elektromagnetisch wirkende Maßnahmen am die Kontakte tragenden Schaltarm vorzunehmen. Dies hat den Nachteil, dass das erzeugte Magnetfeld in der Nähe des Schaltkontakts vorhanden ist und unerwünschten Einfluss auf die Lichtbogenbewegung hat, was mit einer Verminderung des Löscheffekts verbunden ist. Weiterhin können am Schaltarm vorhandene elektromagnetisch wirkende Maßnahmen nur eine in der Hebelarmlänge begrenzte Hebelwirkung entfalten. Da wegen des magnetischen Einflusses auf den Lichtbogen ein gewisser Abstand vom Schaltkontakt eingehalten werden muss, ist der mögliche Abstand zum Drehpunkt des Schaltarms und damit die mögliche Hebelarmlänge einschränkt.It is known, force-enhancing, electromagnetically acting measures on the contacts carrying the switching arm. This has the disadvantage that the magnetic field generated in the Near the switching contact is present and undesirable influence on the arc movement has what is associated with a reduction of the extinguishing effect. Furthermore, on Shift arm existing electromagnetically acting measures only one in the Hebelarmlänge unfold limited leverage. Because of the magnetic influence on the arc a certain distance from the switching contact must be maintained, is the possible distance to the pivot point of the switching arm and thus limits the possible lever arm length.

Die erfindungsgemäße Anordnung hat demgegenüber den Vorteil, dass das eingesetzte Magnetfeld weit entfernt von der Lichtbogenlöscheinrichtung wirksam ist und das Magnetfeld gut gegenüber dieser abschirmbar ist. Eine Beeinflussung der Lichtbogenlöschung findet nicht statt. Zum anderen kann durch den Einsatz der erfindungsgemäßen Anordnung am zweiten Hebelarm des Kontakthebels das Drehmoment der Kraftverstärkung groß ausgebildet werden. Am zweiten Hebelarm besteht keine besondere Einschränkung bezüglich Ort der Anordnung oder Länge des Hebelarms.The arrangement according to the invention has the advantage that the magnetic field used far from the arc quenching device is effective and the magnetic field is good is shielded from this. There is no influence on the arc quenching. On the other hand, by using the arrangement according to the invention on the second lever arm the contact lever, the torque of the power amplification can be made large. At the second lever arm there is no particular restriction on location of the arrangement or Length of the lever arm.

Die Einzelheiten der Schaltvorrichtung - ohne den beanspruchten Gegenstand darauf zu beschränken - können aus folgendem bestehen: Die Schaltvorrichtung ist insbesondere für einen mehrpoligen Lasttrennschalter mit Isolierstoffgehäuse vorgesehen und umfasst einen einfach unterbrechenden Drehkontakt, mit einem, jedem Pol zugeordneten Schaltantrieb, welcher in einem Lager im Isolierstoffgehäuse um eine Achse senkrecht zur Längsausdehnung des Drehkontakts drehbar gelagert ist. Der eigentliche Schalter besteht aus einem feststehenden, mit einer Stromschiene verbundenen Kontaktstück, einem in einer Schaltwelle gelagertem, zweiarmig, nicht unbedingt symmetrisch ausgebildeten Hebelarm mit einem Kontaktstück, welches in Schaltberührung mit einem Festkontaktstück kommt. The details of the switching device - without limiting the claimed subject matter thereto - may consist of the following: The switching device is in particular for a multi-pole switch disconnector with insulating material housing and includes a simple interrupting rotary contact, with a, each pole associated switching drive, which in a bearing in the insulating housing about an axis perpendicular to the longitudinal extent of the rotary contact is rotatably mounted. The actual switch consists of a fixed, with a busbar connected contact piece, a stored in a shift shaft, two-armed, not necessarily symmetrical lever arm with a contact piece, which in Switching contact comes with a fixed contact piece.

Der Kontakthebel kann bezüglich der Hebelarme unsymmetrisch ausgebildet sein, wobei der zweite Hebelarm zum Angriff der elektromagnetischen Kontaktkraftverstärkung länger sein kann als der erste Hebelarm.The contact lever may be formed asymmetrically with respect to the lever arms, wherein the second lever arm to attack the electromagnetic contact force gain may be longer as the first lever arm.

Zwei als Zugfedern ausgebildete Kontaktdruckfedern stützen sich hinter einer Nase am Kontakthebel ab und üben jeweils - in bekannter Weise - ein in Schließbewegung gerichtetes Drehmoment auf den Kontakt aus. Die Kontaktdruckfedern haben ihre Abstützung in der Schaltwelle. Die Kontaktdruckfedern sind paarweise beiderseits des Kontakthebels nach Form und Kraftausübung symmetrisch ausgebildet. Das Abstützelement jeder Kontaktdruckfeder ist als zur Schaltwelle parallel-liegender Steg ausgebildet und ansonsten sind die Kontaktdruckfedern paarig-symmetrisch beiderseits des Stegs ausgebildet.Two trained as tension springs contact springs are based behind a nose on the contact lever and practice each - in a known manner - a directed in closing movement torque on the contact. The contact springs have their support in the switching shaft. The contact springs are in pairs on both sides of the contact lever shape and Power exercised symmetrical. The support member of each contact pressure spring is as formed to the shift shaft parallel-lying web and otherwise are the contact pressure springs formed in pairs symmetrically on both sides of the web.

Die Schaltwelle steht mit einer Antriebsvorrichtung in Verbindung, die ein Schaltschloss und ein Handbetätigungsglied aufweist - siehe schematisch in FIG. 2. Ferner steht das Schaltschloss mit Auslösern in Verbindungen, für die als Beispiele Überstromauslöser oder ein Unterspannungsauslöser genannt werden können.The switching shaft is connected to a drive device in combination, which includes a switching mechanism and a Hand actuator has - see schematically in FIG. 2. There is also the switch lock with triggers in connections, for example, overcurrent release or an undervoltage release can be called.

Weitere bevorzugte Ausführungsformen haben folgende Gestalt:Further preferred embodiments have the following shape:

Das Kontaktkraftverstärkungsmittel ist als trog- oder U-förmiges magnetisierbares Materialstück ausgebildet. Es nach einer Ausführungsform ist im oberen Bereich der Anschlusskammer befestigt. Die Position im oberen Bereich ist nicht die allein mögliche, da diese von der Anordnung der Schaltkontakte bestimmt ist. Eine Umkehrung der Lage abhängig von der Umkehrung der Drehbewegung des Kontaktarms und der Änderung der Lage der Schaltkontakte im Schaltkontaktraum ist ebenfalls eine erfindungsgemäße Anordnung. Das Materialstück übergreift teilweise oder ganz mit seinen Trogseitenflächen den zweiten Kontaktarm in der Anschlusskammer einschließlich die Befestigungsstelle des flexiblen Leiters. Vorzugsweise kann das Magnetstück auch so lang ausgebildet sein, dass es noch einen Bereich des flexiblen Leiters übergreift. DieThe contact force reinforcing means is as a trog or U-shaped magnetizable piece of material educated. It according to one embodiment is mounted in the upper region of the connection chamber. The position in the upper area is not the only possible, as this of the arrangement the switching contacts is determined. A reversal of the situation depending on the reversal of the Rotary movement of the contact and the change in the position of the switching contacts in the switch contact space is also an inventive arrangement. The piece of material partially overlaps or entirely with its trough side surfaces, the second contact arm in the connection chamber including the attachment point of the flexible conductor. Preferably, the magnet piece be formed so long that it still overlaps a portion of the flexible conductor. The

An den Trogseitenflächen und der Befestigungsfläche (Trogboden) des Magnetkörpers sind funktionelle Bereiche abgegrenzt, die im weiteren noch erläutert werden sollen.At the trough side surfaces and the mounting surface (trough bottom) of the magnetic body are delimited functional areas, which will be explained below.

Der Kontakthebel ist im wesentlichen um 180° drehsymmetrisch ausgebildet. Am Kontakthebel sind zwischen seinem Drehpunkt und den Hebelarmenden Mitnehmerflächen angeordnet, die von dem Antrieb der Schaltvorrichtung beaufschlagbar ist. In einer einfachen Ausführung kann die Achs-Aufnahmebohrung des Kontakthebels eine normale kreisrunde Bohrung sein.The contact lever is substantially rotationally symmetrical about 180 °. At the contact lever are arranged between its pivot point and the Hebelarmenden driving surfaces, the can be acted upon by the drive of the switching device. In a simple design can the axle receiving bore of the contact lever be a normal circular bore.

Vorzugsweise ist in dem Kontakthebel eine Achs-Aufnahmebohrung in Form eines Langlochs - anstelle einer ebenfalls möglichen einfachen Bohrung - ausgebildet. Die Längsausdehnung des Langlochs liegt parallel zu einem Kreis mit einem Mittelpunkt, der etwa in den Punkt der Berührung des Bewegtkontaktstücks mit dem Festkontaktstück fällt. Die Achsverschieblichkeit im Langloch kann einen Betrag von etwa 300 µm haben. Mit der Achsverschieblichkeit wird eine Veränderung der Hebelarm-Beziehung bewirkt. Der Angriff der öffnenden Kräfte oder Drehmomente des Antriebs der Schaltvorrichtung verändert sich von einer symmetrischen Angriffsposition auf die Mitnehmerflächen zu einer unsymmetrischen Angriffssituation bei verschweißten Kontakten, wobei der Hebelarm des öffnenden Drehmoments deutlich vergrößert ist.Preferably, in the contact lever, an axle receiving bore in the form of a slot - instead of a likewise possible simple bore - formed. The longitudinal extent of the Langloch is parallel to a circle with a center that is approximately in the point of contact of the moving contact piece with the fixed contact piece falls. The axial displacement in the Slot can have an amount of about 300 microns. With the Achsverschieblichkeit becomes a Change in the lever arm relationship causes. The attack of the opening forces or torques the drive of the switching device changes from a symmetrical attack position on the driver surfaces to an asymmetrical attack situation when welded Contacts, wherein the lever arm of the opening torque is significantly increased.

So wird bei verschweißten Kontaktstücken die Öffnungsbewegung unterstützt durch eine erzwungene Verlagerung des Hebelarms bezüglich der Mitnehmerflächen auf dem Kontakthebel. Der Hebelarm verlängert sich in Richtung eines größeren Abstandes von den Kontaktstücken.Thus, in welded contact pieces, the opening movement is supported by a forced Displacement of the lever arm with respect to the driving surfaces on the contact lever. The lever arm extends in the direction of a greater distance from the contact pieces.

In der Schaltwelle kann im Bereich der Kontaktkraftfedern ein Schirmblech angeordnet werden, welches den Querschnitt für den Durchtritt von Lichtbogengasen aus der Kontaktkammer in die Anschlusskammer vermindert.In the switching shaft, a shield plate can be arranged in the area of the contact force springs, which the cross section for the passage of arc gases from the contact chamber in the Connection chamber reduced.

Vorzugsweise kann in der Löschkammer in Nachbarschaft der Öffnungsstrecke des Kontakts ein Material angeordnet werden, welches lichtbogenlöschendes Gas freisetzt. Solche Materialen bestehen aus Kunststoff, dem Beimengungen zugegeben sind, die bei Erwärmung durch den Lichtbogen Gase ausscheiden. Das Material kann in Form mindestens eines plattenförmigen Einsatzes zu beiden Seiten der Öffnungsstrecke formschlüssig eingebracht sein.Preferably, in the quenching chamber in the vicinity of the opening distance of the contact a material can be arranged which releases arc-quenching gas. Such materials are made of plastic, are added to the admixtures, when heated by eliminate the arc gases. The material may be in the form of at least one plate-shaped Insert be introduced positively on both sides of the opening section.

Weitere Vorteile und Merkmale gehen deutlicher aus der folgenden Beschreibung einer Ausführungsform hervor, die als Beispiel genannt wird, und in den beigefügten Zeichnungen dargestellt ist. Dabei zeigen:

  • Fig. 1 eine erste Schnittdarstellung der Schaltvorrichtung in einer ersten Schnittebene,
  • Fig. 2 eine zweite Schnittdarstellung in einer zur Schnittebene der Fig. 1 versetzten Schnittebene,
  • Fig. 3 eine Aufsicht auf die Schaltvorrichtung,
  • Fig. 4 eine perspektivische Ansicht,
  • Fig. 5 eine Darstellung des zweiarmigen Schaltstücks,
  • Fig. 6 die Darstellung des Hebelarms in der Öffnungsbewegung,
  • Fig. 7A und 7B perspektivische Ansicht und Seitenansicht des Magnetkörpers und
  • Fig. 8 eine Darstellung des Schirmblechs.
    • Further advantages and features will become more apparent from the following description of an embodiment given as an example and illustrated in the accompanying drawings. Showing:
  • 1 is a first sectional view of the switching device in a first sectional plane,
  • 2 shows a second sectional view in a section plane offset from the sectional plane of FIG. 1, FIG.
  • 3 is a plan view of the switching device,
  • 4 is a perspective view
  • 5 is an illustration of the two-armed contact piece,
  • 6 shows the illustration of the lever arm in the opening movement,
  • 7A and 7B perspective view and side view of the magnetic body and
  • Fig. 8 is an illustration of the shielding plate.

    • Unter Bezugnahme auf die Figuren wird ein Niederspannungs-Lasttrennschalter dargestellt. Die Figuren zeigen beispielhaft eine Schaltvorrichtung mit einem Isolierstoffgehäuse 2. Das Isolierstoffgehäuse weist eine in einem Lager um eine feststehende Querachse drehbare Schaltwelle 90 auf, wobei die Querachse senkrecht zu Längsrichtung jedes Pols steht. Der Pol umfasst einen mit einer ersten Stromanschlussschiene 20' verbundenen Festkontakt 9'With reference to the figures, a low-voltage switch-disconnector is shown. The Figures show an example of a switching device with a Isolierstoffgehäuse 2. The insulating material has a rotatable in a bearing about a fixed transverse axis shift shaft 90, wherein the transverse axis is perpendicular to the longitudinal direction of each pole. The pole includes one fixed contact 9 'connected to a first power connection rail 20'

    Der Kontakthebel 80 ist um 180° drehsymmetrisch ausgebildet und hat zwei sich gegenüberliegende Hebelarme 81, 82, welche sich entlang der Längsachse des Pols erstrecken und die Schaltwelle 90 durchdringen.The contact lever 80 is rotationally symmetrical about 180 ° and has two opposite ones Lever arms 81, 82 which extend along the longitudinal axis of the pole and the Steering shaft 90 penetrate.

    Das bewegliche Kontaktstück 9" am ersten Hebelarm 81 des Kontakthebels 80 tritt mit dem ihm gegenüberstehenden festen Kontaktstück 9' in Schaltberührung. Am zweiten Hebelarm 82 des Kontakthebels 80 ist ein (schematisch gezeichneter) flexibler Leiter (Anschlusslitze) 22 fest verbunden. Die Anschlusslitze 22 führt leitend zu der zweiten Stromanschlussschiene 20" und hat dort ihre zweite Befestigungsstelle 22" (Lötstelle).The movable contact piece 9 "on the first lever arm 81 of the contact lever 80 occurs with him opposite fixed contact piece 9 'in switching contact. At the second lever arm 82 of the Contact lever 80 is a (schematically drawn) flexible conductor (pigtail) 22 firmly connected. The pigtail 22 conducts to the second power connection rail 20 "and has there her second attachment point 22 "(solder joint).

    Im Innern der Schaltwelle 90 sind zwei Kontaktkraftfedern 10', 10" angebracht, die auf den Kontakthebel 80 einwirken und einen festgelegten Kontaktdruck des Kontaktstücks 9" gewährleisten, wobei eines der Ende jeder Kontaktkraftfeder 10', 10" mit einem Mitnehmerelement der Schaltwelle zusammenwirkt und das andere Ende an einer Nase 84, bzw. durch die Nase gebildete Nut am Kontakthebel abgestützt wird. Die Angriffspunkte stehen sich diametral gegenüber.Inside the shift shaft 90 are two contact force springs 10 ', 10 "mounted on the contact lever 80 act and ensure a specified contact pressure of the contact piece 9 " wherein one of the end of each contact force spring 10 ', 10 "with a driver element of Switching shaft cooperates and the other end to a nose 84, or formed by the nose Nut is supported on the contact lever. The attack points are diametrically opposed.

    Ein für die Erfindung wesentliches Merkmal ist die Ausbildung zweier Kammern im Isolierstoffgehäuse. In der ersten Kammer (Löschkammer 40), in der sich der erste Hebelarm 81 bewegt, ist die für solche Schalter übliche Löscheinrichtung 42 untergebracht; in der zweiten Kammer - hier im Text als Anschlusskammer 50 bezeichnet - ist der zweite Hebelarm 82 beweglich angeordnet. Die Anschlusskammer 50 bietet Platz für die Bewegung des zweiten Hebelarms einschließlich des an ihm befestigten flexiblen Leiters 22. In der Anschlusskammer ist der Magnetkörper 30 angeordnet, der als das elektromagnetisch wirkende Kontaktkraftverstärkungsmittel dient.An essential feature of the invention is the formation of two chambers in Isolierstoffgehäuse. In the first chamber (quenching chamber 40), in which the first lever arm 81 moves, is the usual for such switch extinguishing device 42 housed; in the second chamber - here referred to in the text as a connection chamber 50 - the second lever arm 82 is movably arranged. The connection chamber 50 accommodates the movement of the second lever arm inclusive the attached to him flexible conductor 22. In the connection chamber is the magnetic body 30 arranged as the electromagnetically acting contact force amplifying means serves.

    Ergänzend zu der aus einem Paket von Blechen bestehenden Löscheinrichtung 42 kann in der Löschkammer 40 in Nachbarschaft der Öffnungsstrecke des Kontakts ein lichtbogenlöschendes Material angeordnet sein. Dieses Material soll lichtbogenlöschende Gase freisetzen. Solche Materialen sind dem Fachmann bekannt. Sie bestehen in der Regel aus Kunststoff, dessen Beimengungen bei Erwärmung durch den Lichtbogen Gase ausscheiden. Das Material kann in Form mindestens eines plattenförmigen Einsatzes zu beiden Seiten der Öffnungsstrecke (Weg des Kontaktstücks 9") im Isolierstoffgehäuse formschlüssig eingebracht sein. Da die Öffnungsstrecke in der vorliegenden Ausführungsform relativ kurz ist, unterstützt das gasfreisetzende Material das Erlöschen eines Lichtbogens. Das Material kann modular in Form zweier Plättchen ausgebildet sein, die in Führungsnuten an der Gehäuseinnenwand einschiebbar sind.In addition to the existing of a package of sheets extinguishing device 42 may in the Extinguishing chamber 40 in the vicinity of the opening distance of the contact an arc extinguishing Material arranged. This material is intended to release arc-quenching gases. Such Materials are known in the art. They are usually made of plastic, whose Additions when heated by the arc precipitate gases. The material can be in Shape at least one plate-shaped insert on both sides of the opening path (way of the contact piece 9 ") in the insulating material housing can be positively inserted in the present embodiment is relatively short, supports the gas-releasing Material the extinction of an arc. The material can be modular in the form of two platelets be formed, which can be inserted in guide grooves on the housing inner wall.

    In den Figuren 2 bis 4 sind neben anderen Einzelheiten die Anschlussschienen 20' und 20" erkennbar. Die Anschlussschienen sind vorzugsweise im Gerätegehäuse im Spritzgussverfahren integriert eingebettet. Als Besonderheit für die Lichtbogenlenkung ist in der Anschlussschiene 20' im Stromlauf direkt vor dem Festkontakt 9 ' eine Bohrung 24 eingebracht, in der ein Einsatzkörper (Niet) aus ferromagnetischem Material eingelegt ist. Durch die Bohrung wird die Strombahn vor dem Festkontakt aufgespreizt und der ferromagnetische Niet verändert die Struktur des Magnetfelds in der unmittelbaren Nähe des Schaltkontakts. Dabei wird die Bewegung eines sich ausbildenden Lichtbogens zur Löscheinrichtung hin bzw. in diese hinein gefördert.In Figures 2 to 4, among other details, the connecting rails 20 'and 20 "can be seen. The connecting rails are preferably in the device housing by injection molding embedded embedded. As a special feature for the arc steering is in the connecting rail 20 'in the circuit directly in front of the fixed contact 9' a bore 24 is introduced, in which an insert body (Rivet) made of ferromagnetic material is inserted. Through the hole is the current path spread apart before the fixed contact and the ferromagnetic rivet changes the structure the magnetic field in the immediate vicinity of the switch contact. The movement of a Forming arc promoted towards the extinguishing device or in this.

    In den Fig. 7A (perspektivische Ansicht) und Fig. 7B (Seitenansicht) ist der Magnetkörper 30 dargestellt. Der Magnetkörper 30 ist beispielsweise magnetisierbarer Stahl. Er ist im oberen Bereich der Anschlusskammer 50 über Schrauben 38, die durch Befestigungsbohrungen 39 greifen, befestigt. Der Magnetkörper hat die Form eines nach unten offenen Magnetjochs. Wobei im Grund des Magnetjochs ein als Befestigungsfläche 31 (Trogboden) dienender Querschenkel liegt. Am Trogboden sind rechts und links nach unten gerichtete Trogseitenflächen 32 ausgebildet. Der Trogboden öffnet sich im zum Kontakthebel gerichteten Bereich trapezförmig, da er dort die Anschlusslitze übergreift, die eine größere Breite einnimmt als der zweite Kontaktarm.In Figs. 7A (perspective view) and Fig. 7B (side view), the magnetic body 30 is shown. The magnetic body 30 is, for example, magnetizable steel. He is in the upper Area of the connection chamber 50 via screws 38 passing through mounting holes 39 grab, fastened. The magnetic body has the shape of a downwardly open magnetic yoke. In which in the bottom of the magnetic yoke serving as a mounting surface 31 (trough bottom) transverse leg lies. At the bottom of the trough are downwardly directed trough side surfaces 32 right and left educated. The trough bottom opens trapezoidal in the area directed to the contact lever, because there he overlaps the pigtail, which occupies a greater width than the second contact arm.

    Die Schmalseite des Trapezes liegt kontakthebelseitig und die Breitseite des Trapezes liegt kontakthebelfern. Im vom Kontakthebel entfernten Bereich ist der Trogboden rechteckig ausgebildet. Die Trogseitenflächen übergreifen den zweiten Hebelarm und die Befestigungsstelle (Lötstelle) 22" des flexiblen Leiters in der Schliess-Stellung der Schaltanordnung. Das trogförmige Magnetjoch wird vorzugsweise möglichst groß ausgebildet, um eine möglichst große magnetische Durchflutung zu erzielen. Dies lässt sich einfach erreichen, weil die räumlichen Möglichkeiten der Anschlusskammer gut ausnutzbar sind.The narrow side of the trapezoid lies on the contact lever side and the broad side of the trapezoid lies contact lever away. In the remote from the contact lever area of the trough bottom is rectangular. The trough side surfaces overlap the second lever arm and the attachment point (Solder joint) 22 "of the flexible conductor in the closed position of the switching arrangement Magnetic yoke is preferably formed as large as possible to the largest possible to achieve magnetic flux. This can be achieved simply because the spatial Possibilities of the connection chamber are well exploitable.

    Die Trogseitenflächen 32 können auch noch einen Großteil des flexiblen Leiters übergreifen. Sie haben im Bereich der Überdeckung mit dem zweiten Kontaktarm einen ersten Bereich /, in dem sich die Seitenflanken 32a in Richtung auf die Anschlusslitze 22 erweitern. Die Aufsicht von unten auf den Magnetkörper 30 zeigt auch die Fig. 3. Die Mitte des Bereichs / entspricht etwa der Mitte der Position der Befestigungsstelle 22" des flexiblen Leiters am Hebelarm 81. Der Bereich / der Trogseitenflächen 32 bildet eine ansteigende Seitenflanke 32a und geht in einen Bereich // über. Dieser Bereich II - hier als Rückenflanke 32b bezeichnet - hat etwa dieselbe Länge wie die größte Länge der Seitenflanke 32a. Der Bereich II übergreift ein Stück der freien Anschlusslitze und wirkt als Abschirmung zwischen den Magnetfeldem der Anschlusslitzen benachbarter Pole.The trough side surfaces 32 can also overlap a large part of the flexible conductor. In the region of the overlap with the second contact arm, they have a first region / in which the side flanks 32a widen in the direction of the pigtail 22. 3. The center of the area / corresponds approximately to the middle of the position of the attachment point 22 "of the flexible conductor on the lever arm 81. The area / the trough side surfaces 32 forms a rising side flank 32a and leaves This region II - here referred to as the back flank 32b - has approximately the same length as the largest length of the side flank 32a The region II engages over a portion of the free pigtail and acts as a shield between the magnetic fields of the pigtails of adjacent poles.

    Der Trogboden 31 des Magnetkörpers ist in Richtung zur Stromanschlussschiene um einen Bereich III verlängert - hier als Verlängerungsbereich 36 bezeichnet. An dem Bereich III sind keine Seitenflanken vorhanden. Mit dem Verlängerungsbereich wird bewirkt, dass die anziehende Kraft des Magnetjochs auch auf die Anschlusslitze wirksam werden kann.The trough bottom 31 of the magnetic body is extended in the direction of the power supply rail by a region III - here referred to as extension region 36. At the area III there are no side flanks. The extension area has the effect that the attractive force of the magnetic yoke can also be effective on the pigtail.

    Über die Lebensdauer der Schaltvorrichtung arbeiten sich die Kontakte ab und der Durchhub ändert sich. Damit ändert sich auch die Lage des zweiten Schaltarms im Magnetkörper und die effektive magnetische Kraftverstärkung in Abhängigkeit vom aktuellen Durchhub. Form (Länge, Schrägausbildung) und Lage der Seitenflanken 32a werden vorzugsweise so gewählt, dass über die Lebensdauer der Schaltvorrichtung die magnetische Kraftverstärkung ansteigt, um am möglichen Lebensdauerende den größtmöglichen Wert zu erreichen.Over the life of the switching device, the contacts work off and the stroke changes. This also changes the position of the second switching arm in the magnetic body and the effective magnetic force amplification depending on the current lift. Shape (length, Oblique formation) and position of the side edges 32a are preferably chosen so that over the life of the switching device, the magnetic force amplification increases to at possible end of life to reach the maximum possible value.

    Der Kontakthebel 80 ist in Fig. 5 und 6 dargestellt. Er ist um 180° drehsymmetrisch um seine Drehachse ausgebildet. An ihm sind zwischen seinem Drehpunkt 7 und den Hebelarmenden Mitnehmerflächen 86, 87 angeordnet, die von dem Antrieb der Schaltvorrichtung (Schaltwellensegmente 92, 93) beaufschlagt werden.The contact lever 80 is shown in FIGS. 5 and 6. He is 180 ° rotationally symmetrical about his Rotary axis formed. On him are between his fulcrum 7 and the Hebelarmenden Mitnehmerflächen 86, 87 arranged by the drive of the switching device (switching shaft segments 92, 93) are acted upon.

    Im Kontakthebel ist eine Achs-Aufnahmebohrung 120 in Form eines Langlochs ausgebildet. Der Durchmesser D hat eine möglichst kleine Toleranz. Die Längsachse des Langlochs liegt auf einem Kreis mit dem Mittelpunkt M, so dass der Winkel W 90° beträgt.In the contact lever, an axle receiving bore 120 is formed in the form of a slot. The diameter D has the smallest possible tolerance. The longitudinal axis of the slot lies on a circle with the center M, so that the angle W is 90 °.

    Wie in Fig. 5 dargestellt ist die Längsachse des Langlochs 120 um einen Betrag E von 300 µm +/- 50 µm größer ist als die Querachse D des Langlochs. Die Hebelarm-Beziehung ist schematisch in FIG. 6 eingezeichnet.As illustrated in FIG. 5, the longitudinal axis of the slot 120 is greater than the transverse axis D of the slot by an amount E of 300 μm +/- 50 μm. The lever arm relationship is shown schematically in FIG. 6 drawn.

    Beim Schließen des Kontakts nach der ersten Kontaktgabe wird das Langloch an die Achse des Schaltwellensegments 92,93 angelegt; der Kontakthebel liegt außermittig. Bei der Öffnungsbewegung des Schaltwellensegments trifft dieses auf die Mitnehmerfläche 87 auf den außermittig liegenden Kontakthebel und leitet eine Kraftwirkung in die Verschweißzone bei M ein, bis das Schaltwellensegment am gegenüberliegenden Anschlag auftrifft und den Kontakt anhebt. Es ist ein axiales Spiel E möglich, welches die Veränderung der Hebelarm-Beziehung bewirkt. Der Angriff der öffnenden Kräfte oder Drehmomente des Antriebs der Schaltvorrichtung (Schaltwellensegmente 92,93) verändert in eine solche Angriffsposition, dass der lange Hebelarm H an der Mitnehmerfläche 87 wirksam wird und das öffnende Drehmoment deutlich vergrößert ist. Ein Angriff über die Mitnehmerflächefläche 86 findet nachrangig statt, vorrangig entsteht ein Drehmoment mit dem Hebelarm H Schaltwellensegment 92 auf die Mitnehmerfläche 87. Mit der durch den vergrößerte Hebelarm bewirkte Winkelbewegung entsteht eine höhere Kraft, die insbesondere das Trennen verschweißter Kontakte ermöglicht.When closing the contact after the first contact the slot is applied to the axis of the switching shaft segment 92,93; the contact lever is off-center. During the opening movement of the shift shaft segment, this strikes the driver surface 87 on the off-center contact lever and initiates a force action in the welding zone at M until the shift shaft segment strikes the opposite stop and lifts the contact. It is an axial clearance E possible, which causes the change in the lever arm relationship. The attack of the opening forces or torques of the drive of the switching device (switching shaft segments 92,93) changed in such an attack position that the long lever arm H on the cam surface 87 is effective and the opening torque is significantly increased. An attack on the Mitnehmerflächefläche 86 takes place subordinated, primarily creates a torque with the lever arm H switching shaft segment 92 on the cam surface 87. With the caused by the enlarged lever arm angular movement creates a higher force, which allows in particular the separation of welded contacts.

    An Lage und Form des Langlochs ist wesentlich, dass eine schräge Anstellung des Langlochs gegenüber der Längsachse des Kontakthebels vorhanden ist. Die damit bezweckte Wirkung wird unterstützt durch eine schräge Ausrichtung der Kontaktkraftfedern hinsichtlich ihrer longitudinalen Kraftwirkung, d.h. der Kraftlinie zwischen den Angriffspunkten der entsprechenden Kontaktkraftfeder an den zugehörigen Angriffspunkten, bzw. Hebelarmen des Kontaktarms und an der Schaltwelle bzw. dem Schaltwellensegment, gegenüber der Längsachse des Kontaktarms sowie dem Verlauf des Langlochs.At location and shape of the slot is essential that an oblique employment of the slot is present with respect to the longitudinal axis of the contact lever. The intended effect is supported by an oblique orientation of the contact force springs with respect to their longitudinal Force effect, i. the line of force between the points of attack of the corresponding Contact force spring at the associated points of attack, or lever arms of the contact and on the switching shaft or the switching shaft segment, with respect to the longitudinal axis of the contact arm as well as the course of the slot.

    So kann bei Verkleben der Kontaktstücke die Öffnungsbewegung (in Pfeilrichtung R) unterstützt werden durch eine erzwungene Verlagerung des Hebelarms bezüglich der Mitnehmerflächen auf dem Kontakthebel.Thus, when gluing the contact pieces, the opening movement (in the direction of arrow R) supported be by a forced displacement of the lever arm with respect to the driver surfaces on the contact lever.

    Weiterhin ist in der Schaltwelle 90 im Bereich der Kontaktkraftfedern 10',10" ein Schirmblech 60 angeordnet, welches in Fig. 8 gezeichnet ist. Das Schirmblech, dessen Lage in der Schaltwelle auch in Fig. 1 zu erkennen ist, vermindert den Querschnitt für den Durchtritt von Lichtbogengasen aus der Kontaktkammer 40 in die Anschlusskammer 50. Damit lässt sich ein schnellerer Druckaufbau in der Kontaktkammer erzielen. Der Druckaufbau wirkt auf den entstehenden Lichtbogen und bläst ihn in Richtung Ausblasöffnung 44 der Kontaktkammer. Dies bewirkt vorteilhafterweise ein beschleunigtes Trennen des Lichtbogens vom Festkontaktstück 9'. Das Schirmblech 60 hat die Form eines Rechtecks. Im Inneren der Rechteckform ist ein Fenster 68 zum Durchgriff des Kontakthebels vorhanden. An der Schmalseite des Rechtecks ist ein Haken 64 ausgebildet zum Übergreifen über einen in der Schaltwelle 90 ausgebildeten Quersteg, der auch Angriffssteg für die Kontaktkraftfedern ist. Beim Zusammenbau der Schaltwelle mit Kontaktkraftfedern und Kontakthebel wird die Drehachse des Kontakthebels durch die Aufnahmen 67' im Schirmblech hindurch gefädelt. Das Schirm blech hat eine relative lockere Lage, um nicht die Beweglichkeit der Schaltwelle und des Kontakthebels einzuschränken.Furthermore, in the switching shaft 90 in the region of the contact force springs 10 ', 10 "a shield plate 60th arranged, which is drawn in Fig. 8. The shield plate, its position in the selector shaft can also be seen in Fig. 1, reduces the cross section for the passage of arc gases from the contact chamber 40 in the connection chamber 50. This can be a faster Achieve pressure build-up in the contact chamber. The build-up of pressure acts on the resulting Arc and blows him in the direction of the discharge opening 44 of the contact chamber. This advantageously works an accelerated separation of the arc from the fixed contact piece 9 '. The Shield 60 has the shape of a rectangle. Inside the rectangular shape is a window 68 for the passage of the contact lever available. There is a hook on the narrow side of the rectangle 64 configured to engage over a formed in the switching shaft 90 transverse web, the also attack ridge for the contact force springs is. When assembling the stem with contact force springs and contact lever is the axis of rotation of the contact lever through the recordings Threaded 67 'in the shield plate. The shield sheet has a relatively loose position, not to to limit the mobility of the shift shaft and the contact lever.

    Die Bezugszeichen sind in folgender Liste aufgeführt, auf die noch Bezug genommen werden soll, soweit sie nicht in der Beschreibung aufgeführt sind.

    2
    Isolierstoffgehäuse
    7
    Drehachse (Querachse)
    9'
    Festkontaktstück
    9"
    Kontaktstück am Kontakthebel
    10' 10"
    Kontaktkraftfedern
    20' 20"
    Anschlussschienen
    22
    Litze
    22' 22"
    Befestigungsstellen der Litze
    24
    Bohrung/Niet in Anschlussschiene 20'
    30
    magnetisierbarer Körper (Magnetjoch)
    I II III
    drei Bereiche des Körpers
    31
    Befestigungsfläche (Querschenkel)
    32
    Trogseitenflächen
    32a
    Vorderflanke
    32b
    Rückenflanke
    36
    Verlängerungsbereich
    38
    Befestigungsschrauben
    39
    Befestigungsbohrungen
    40
    Kontaktkammer (Löschkammer)
    42
    Löscheinrichtung
    44
    Ausblasöffnung
    50
    Anschlusskammer
    60
    Schirmblech
    64
    Haken
    67'
    Achsaufnahmen
    68
    Fenster (Durchgriff für Kontakthebel)
    80
    (zweiarmiger) Kontakthebel einfachunterbrechend
    81, 82
    Hebelarme
    84, 85
    Befestigungsnasen
    86, 87
    Mitnehmerflächen
    E
    axiales Spiel
    W
    Winkel
    D
    Durchmesser Langloch
    R
    öffnende Drehrichtung
    H
    Hebelarm
    M
    Mitte Festkontakt (Verschweißungsstelle)
    90
    Schaltwelle
    92, 93
    Schaltwellensegmente (Mitnehmer)
    120
    Langloch
    The reference numerals are listed in the following list, to which reference should be made, as far as they are not listed in the description.
    2
    Insulated
    7
    Rotary axis (transverse axis)
    9 '
    Fixed contact piece
    9 "
    Contact piece on the contact lever
    10 '10 "
    Contact force springs
    20 '20 "
    connecting rails
    22
    braid
    22 '22 "
    Attachment points of the strand
    24
    Bore / rivet in connection rail 20 '
    30
    magnetizable body (magnetic yoke)
    I II III
    three areas of the body
    31
    Attachment surface (transverse leg)
    32
    Trough side surfaces
    32a
    leading edge
    32b
    back edge
    36
    extension area
    38
    mounting screws
    39
    mounting holes
    40
    Contact chamber (extinguishing chamber)
    42
    extinguishing device
    44
    exhaust vent
    50
    terminal chamber
    60
    shroud
    64
    hook
    67 '
    axle mounts
    68
    Window (handle for contact lever)
    80
    (two-armed) contact lever easy interrupting
    81, 82
    lever arms
    84, 85
    fastening lugs
    86, 87
    driver surfaces
    e
    axial play
    W
    angle
    D
    Diameter slot
    R
    opening direction of rotation
    H
    lever arm
    M
    Middle fixed contact (welding point)
    90
    shift shaft
    92, 93
    Switching shaft segments (driver)
    120
    Long hole

    Claims (14)

    Schaltvorrichtung für einen mehrpoligen Niederspannungs-Lasttrennschalter mit einem Isolierstoffgehäuse (2), in dem zwei Kammern ausgebildet sind, von denen eine erste Kammer als Löschkammer (40) und eine zweite Kammer mit vergleichbarem Volumen als Anschlusskammer (50) fungiert, weiterhin umfasst die Schaltvorrichtung einen einfach unterbrechenden, in einem Lager beweglichen Drehkontakt, wobei der Drehkontakt als zweiarmiger Hebel (80) ausgebildet ist, dessen erster Hebelarm (81) ein Kontaktstück (9') trägt, welches mit einem Festkontakt (9") an einer ersten Stromanschlussschiene (20') mit Unterstützung von Kontaktkraftfedern (10', 10") in Schaltberührung kommt, und der zweite Hebelarm (82) des Drehkontakts mit einem flexiblen Leiter (22) an einer Befestigungsstelle (22') verbunden ist, der in leitender Verbindung mit einer zweiten Stromanschlussschiene (20") steht,
    dadurch gekennzeichnet, dass in der Anschlusskammer (50) ein elektromagnetisch wirkendes Kontaktkraftverstärkungsmittel (30) angeordnet ist, welches in Schließ-Stellung der Kontaktstücke den zweiten Kontaktarm (82) übergreift    Switching device for a multi-pole low-voltage circuit breaker with an insulating housing (2) in which two chambers are formed, of which a first chamber as a quenching chamber (40) and a second chamber of comparable volume as a connection chamber (50) functions, further comprising the switching device The rotary contact is designed as a two-armed lever (80) whose first lever arm (81) carries a contact piece (9 ') which is connected to a fixed contact (9 ") on a first power supply rail (20'). ) is in switching contact with the assistance of contact force springs (10 ', 10 "), and the second lever arm (82) of the rotary contact is connected to a flexible conductor (22) at an attachment point (22') in conductive communication with a second power connection rail (20 ") stands,
    characterized in that in the connection chamber (50) an electromagnetically acting contact force amplifying means (30) is arranged, which engages over the second contact arm (82) in the closed position of the contact pieces         Schaltvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Kontaktkraftverstärkungsmittel (30) ebenfalls Teile des flexiblen Leiters (22) übergreift.Switching device according to claim 1, characterized in that the contact force amplifying means (30) also engages over parts of the flexible conductor (22). Schaltvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Kontaktkraftverstärkungsmittel (30) als trogförmiges magnetisierbares Materialstück ausgebildet ist mit Lage des Trogbodens (31) parallel zum zweiten Kontaktarm (82).Switching device according to claim 1 or 2, characterized in that the contact force amplifying means (30) is formed as a trough-shaped magnetizable material piece with the position of the trough bottom (31) parallel to the second contact arm (82). Schaltvorrichtung nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass das Materialstück (30) im oberen oder unteren Bereich der Anschlusskammer (50) befestigt ist, und mit nach zum zweiten Kontaktarm (82) gerichteten Trogseitenflächen (32) den zweiten Kontaktarm, die Befestigungsstelle (22') des flexiblen Leiters (22) am Kontaktarm und gegebenenfalls Teile des flexiblen Leiters (22) übergreift.Switching device according to the preceding claim, characterized in that the material piece (30) in the upper or lower region of the connection chamber (50) is fixed, and with to the second contact arm (82) directed trough side surfaces (32) the second contact arm, the attachment point (22 '. ) of the flexible conductor (22) engages over the contact arm and possibly parts of the flexible conductor (22). Schaltvorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Trogseitenflächen (32) im Bereich der Überdeckung mit dem zweiten Kontaktarm (82) je eine Seitenflanke (32a) aufweisen, die ihren Ansatz hat am Ort des Endes des zweiten Kontaktsarms (82) und zum Drehpunkt des Kontaktarms (82) hin ansteigt.Switching device according to claim 3 or 4, characterized in that the trough side surfaces (32) in the region of the overlap with the second contact arm (82) each have a side edge (32a) which has its approach at the location of the end of the second contact arm (82) and to the pivot point of the contact arm (82) increases. Schaltvorrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass jeweils im Bereich der Überdeckung mit dem flexiblen Leiter (22) die Trogseitenflächen (32) eine Rückenflanke (32b) aufweisen und der Trogboden eine Verlängerungsnase (III) aufweist. Switching device according to one of claims 2 to 5, characterized in that in each case in the region of the overlap with the flexible conductor (22), the trough side surfaces (32) have a back flank (32b) and the trough bottom has an extension nose (III). Schaltvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kontaktkraftverstärkungsmittel (30) mit möglichst großem magnetischem Durchflutungsquerschnitt ausgebildet ist.Switching device according to one of the preceding claims, characterized in that the contact force amplifying means (30) is formed with the largest possible magnetic flow cross-section. Schaltvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kontakthebel (80) mit Ausnahme der Hebelarmlängen um 180° drehsymmetrisch ausgebildet ist.Switching device according to one of the preceding claims, characterized in that the contact lever (80) with the exception of the Hebelarmlängen is 180 ° rotationally symmetrical. Schaltvorrichtung nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass am Kontakthebel (80) zwischen seinem Drehpunkt (7) und den Hebelarmenden je eine Mitnehmerfläche (86, 97) angeordnet ist, die von dem Antrieb (92, 93) der Schaltvorrichtung beaufschlagbar ist.Switching device according to the preceding claim, characterized in that on the contact lever (80) between its pivot point (7) and the Hebelarmenden depending a driver surface (86, 97) is arranged, which by the drive (92, 93) of the switching device can be acted upon. Schaltvorrichtung nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass in dem Kontakthebel (80) eine Achs-Aufnahmebohrung (120) in Form eines Langlochs ausgebildet ist, dessen Längsachse auf einem Kreis liegt, dessen Mittelpunkt ( M ) in der Mitte der Berührungsflächen der Schaltkontaktstücke (9', 9") liegt.Switching device according to the preceding claim, characterized in that in the contact lever (80) has an axle receiving bore (120) is formed in the form of a slot whose longitudinal axis lies on a circle whose center ( M ) in the middle of the contact surfaces of the switching contact pieces (9 ', 9 "). Schaltvorrichtung nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass die Längsachse des Langlochs (120) um einen Betrag ( E ) von 300 µm +/- 50 µm größer ist als die Querachse (D) des Langlochs.Switching device according to the preceding claim, characterized in that the longitudinal axis of the slot (120) by an amount ( E ) of 300 microns +/- 50 microns is greater than the transverse axis (D) of the slot. Schaltanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Schaltwelle (90) ein Schirmblech (60) angeordnet ist, welches den Querschnitt für den Durchtritt von Lichtbogengasen aus der Kontaktkammer (40) in die Anschlusskammer (50) vermindert.Switching arrangement according to one of the preceding claims, characterized in that in the switching shaft (90) a shield plate (60) is arranged, which reduces the cross section for the passage of arc gases from the contact chamber (40) in the connection chamber (50). Schaltanordnung nach vorhergehendem Anspruch, dadurch gekennzeichnet, dass das Schirmblech (60) in Form eines Rechtecks ausgebildet ist mit einem im Inneren vorhandenen Fenster (68) zum Durchgriff des Kontakthebels und mit einem an der Schmalseite des Rechtecks ausgebildeten Haken (64) zum Übergreifen über einen in der Schaltwelle (90) ausgebildeten Quersteg.Switching arrangement according to the preceding claim, characterized in that the shield plate (60) is in the form of a rectangle with an existing window inside (68) for the passage of the contact lever and with a formed on the narrow side of the rectangle hook (64) for reaching over a formed in the switching shaft (90) transverse web. Schaltanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Löschkammer (40) in Nachbarschaft der Öffnungsstrecke des Kontakts (9', 9") ein Material angeordnet ist, welches lichtbogenlöschendes Gas freisetzt.Switching arrangement according to one of the preceding claims, characterized in that in the quenching chamber (40) in the vicinity of the opening distance of the contact (9 ', 9 "), a material is arranged, which releases arc-quenching gas.
    EP04024128.3A 2003-10-10 2004-10-09 Switching device with a single break rotary contact Not-in-force EP1523020B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10347148 2003-10-10
    DE2003147148 DE10347148B4 (en) 2003-10-10 2003-10-10 Switching device with easy interrupting rotary contact

    Publications (2)

    Publication Number Publication Date
    EP1523020A1 true EP1523020A1 (en) 2005-04-13
    EP1523020B1 EP1523020B1 (en) 2015-08-05

    Family

    ID=34306356

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04024128.3A Not-in-force EP1523020B1 (en) 2003-10-10 2004-10-09 Switching device with a single break rotary contact

    Country Status (2)

    Country Link
    EP (1) EP1523020B1 (en)
    DE (1) DE10347148B4 (en)

    Cited By (4)

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    EP2416332A1 (en) 2010-08-06 2012-02-08 Eaton Industries GmbH Switching device for an electric low voltage switching device
    EP2587508A1 (en) * 2011-10-25 2013-05-01 Eaton Industries GmbH Circuit breaker
    US8451074B2 (en) 2010-04-13 2013-05-28 Siemens Aktiengesellschaft Switch, in particular load breaking switch
    CN108987208A (en) * 2017-06-05 2018-12-11 周思雨 A kind of miniature circuit breaker and its arc-control device

    Families Citing this family (6)

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    Publication number Priority date Publication date Assignee Title
    DE102006050767B3 (en) * 2006-10-27 2008-05-29 Moeller Gmbh Power supply line for movable contact arm of pole of low voltage switch i.e. circuit breaker, has conductor with end having end section, which is arranged for rail, runs parallel to rotating axis of arm, and fastened to rail at front side
    DE102007048748A1 (en) * 2007-10-08 2009-04-09 Siemens Ag Contact lever i.e. single-way interruption contact lever, for use in circuit breaker utilized for opening and closing electric circuit, has flexible electric conductor directly and firmly connected to switch contact by soldering or welding
    DE102008037967A1 (en) * 2008-08-13 2010-02-18 Siemens Aktiengesellschaft Rotary contact system for power switching device, has spring gripping molded inner contour of recess in spring loaded condition such that arms are provided with slack point characteristic during rotational motion relative to shaft segments
    DE102008039187B4 (en) 2008-08-20 2019-06-19 Siemens Aktiengesellschaft Circuit breaker, especially for low voltage
    DE102008050755A1 (en) 2008-10-07 2010-04-08 Siemens Aktiengesellschaft Electrical device with an electrical connection
    WO2016193042A1 (en) 2015-06-01 2016-12-08 Eaton Electrical Ip Gmbh & Co. Kg Circuit breaker with magnetically assisted opening

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    US8451074B2 (en) 2010-04-13 2013-05-28 Siemens Aktiengesellschaft Switch, in particular load breaking switch
    EP2416332A1 (en) 2010-08-06 2012-02-08 Eaton Industries GmbH Switching device for an electric low voltage switching device
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    CN108987208B (en) * 2017-06-05 2024-04-02 周思雨 Miniature circuit breaker and arc extinguishing device thereof

    Also Published As

    Publication number Publication date
    DE10347148A1 (en) 2005-05-12
    EP1523020B1 (en) 2015-08-05
    DE10347148B4 (en) 2006-01-19

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