EP0885449A1 - Power switch with insulating contact lever carrier - Google Patents

Power switch with insulating contact lever carrier

Info

Publication number
EP0885449A1
EP0885449A1 EP97915338A EP97915338A EP0885449A1 EP 0885449 A1 EP0885449 A1 EP 0885449A1 EP 97915338 A EP97915338 A EP 97915338A EP 97915338 A EP97915338 A EP 97915338A EP 0885449 A1 EP0885449 A1 EP 0885449A1
Authority
EP
European Patent Office
Prior art keywords
bearing pin
contact
locking
contact lever
lever carrier
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
EP97915338A
Other languages
German (de)
French (fr)
Other versions
EP0885449B1 (en
Inventor
Sezai TÜRKMEN
Ulrich Marquardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0885449A1 publication Critical patent/EP0885449A1/en
Application granted granted Critical
Publication of EP0885449B1 publication Critical patent/EP0885449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • 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
    • H01H9/48—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the invention relates to an electrical circuit breaker with a movable contact arrangement and with a drive device which actuates the contact arrangement for switching on and off and which is articulatedly connected to the contact arrangement by a drive lever, a transverse bore for receiving a the drive lever in an insulating contact lever carrier of the contact arrangement is arranged with the contact arrangement connecting bearing pin and the bearing pin is secured against removal from the transverse bore by a locking screw.
  • a circuit breaker with the features mentioned has become known essentially from DE 44 16 105 Cl.
  • the locking screw is in a conductive connection with the bearing pin. This not only includes the bearing pin in contact with the drive lever, but also the one
  • the object of the invention is to increase the dielectric strength of the movable contact arrangement and thereby to improve the security against electrical errors for given dimensions.
  • the above object is achieved in that an axially blocking the bearing bolt, consisting of insulating plastic on the contact lever carrier Locking piece is attached by means of the locking screw.
  • a further dielectric improvement can be achieved in that the locking screw engages in a receiving opening arranged at right angles to the transverse bore and ends at a distance from the bearing pin. In contrast to the previous design of the contact lever carrier, the screw therefore no longer acts as an electrode at earth potential.
  • the locking piece for the bearing pin can be designed as a protective element for covering an assembly opening of the contact lever carrier which provides access to the head piece of the bearing pin. This measure also works in the sense of increasing the creepage distances.
  • the locking piece can have a rib for mutual support of a locking web located in front of the head piece of the bearing pin and a locking leg filling the assembly opening.
  • the rib acts as a stiffener and therefore allows the locking piece to be manufactured as a light plastic molded part.
  • Figure 1 shows a schematic representation
  • FIG. 2 shows a contact lever support shown in FIG. 1 on a larger scale and partly in section.
  • FIG. 3 is an illustration of section III-III in FIG. 2.
  • the low-voltage circuit breaker 1 shown schematically in FIG. 1 has a movable contact arrangement 2, which includes a connecting bar 3, flexible current strips 4 and at least one movable contact lever 5.
  • a contact lever carrier 6 can be pivoted by a drive device 7, a shift shaft 10 actuated thereby and drive lever 11 for switching on and off.
  • the movable contact lever 5 cooperates with a stationary counter contact 12 which is connected to a further connecting rail 13.
  • FIGS. 2 and 3 Details of the connection of the drive lever 11 to the contact lever carrier 6 are described in more detail below with reference to FIGS. 2 and 3.
  • a mounting opening 14 is shown on the top of the contact lever carrier 6, in which a locking piece 15 is located.
  • a bearing pin 17 In a transverse bore 16 of the contact lever carrier 6 there is a bearing pin 17 which passes through a bearing opening of the drive lever 11. It is indicated in FIG. 3 that two parallel drive levers 11 are provided for the power transmission to the contact lever carrier 6.
  • a barrier 20 of the Locking piece 15 is located in front of a head piece 21 of the
  • Bearing pin 17 and secures it against axial displacement in the transverse bore 16.
  • a locking screw 22 engages in a receiving opening 23 of the contact lever carrier 6 and passes through a through opening of a locking leg 24 of the locking piece 15. As can be seen in particular from FIG. 3, the locking leg 24 of the locking piece 15 fills the mounting opening 14 of the contact lever carrier 6.
  • a rib 26 extends between the locking leg 24 and the locking web 20.
  • the rib 26 lies over part of its length against a wall surface 25 of the contact lever carrier 6 delimiting the mounting opening 14. Axial forces which may arise from the bearing bolt 17 are thus introduced directly into the contact lever carrier 6, bypassing the locking screw 22.
  • connection between the contact lever carrier 6 and the drive lever 11 can be established in a simple manner by inserting the bearing bolt 17 into the transverse bore 16.
  • the assembly opening 14 is provided with a lateral mouth 27.
  • the locking piece 15 is then inserted into the mounting opening 14 from above, which is only possible if the locking bar 20 can join the head piece 21 of the bearing pin 17.
  • the locking screw 22 is also inserted into the mounting opening 14 from above.
  • the locking screw 22 is of such a length that a reaching fastening is achieved, but there is still a distance from the bearing pin 17. So that the locking screw
  • Grounding drive device 7 is.
  • Locking screw 22 can therefore not act as an electrode.

Abstract

An electrical power switch (1) is provided with a moving contact device (2) and a drive device (7) connected to the contact device (2) by a drive lever (11) so as to allow articulation. An insulating contact lever carrier (6) of the contact device (2) is provided with a transverse bore for a bearing pin (17) which connects the drive lever (11) to the contact device (2). The bearing pin (17) can slide axially and is secured against sliding during operation of the power switch (1) by a locking element (15). The latter is made from plastic and secured by a locking screw (22) to the contact lever carrier (6).

Description

Beschreibungdescription
Leistungsschalter mit isolierendem KontakthebelträgerCircuit breaker with isolating contact lever carrier
Die Erfindung betrifft einen elektrischen Leistungsschalter mit einer bewegbaren Kontaktanordnung und mit einer die Kontaktanordnung zum Ein- und Ausschalten betätigenden Antriebsvorrichtung, die mit der Kontaktanordnung durch einen Treibhebel gelenkig verbunden ist, wobei in einem iso- lierenden Kontakthebelträger der Kontaktanordnung eine Querbohrung zur Aufnahme eines den Treibhebel mit der Kontaktanordnung verbindenden Lagerbolzens angeordnet ist und der Lagerbolzen gegen Enfernung aus der Querbohrung durch eine Sperrschraube gesichert ist.The invention relates to an electrical circuit breaker with a movable contact arrangement and with a drive device which actuates the contact arrangement for switching on and off and which is articulatedly connected to the contact arrangement by a drive lever, a transverse bore for receiving a the drive lever in an insulating contact lever carrier of the contact arrangement is arranged with the contact arrangement connecting bearing pin and the bearing pin is secured against removal from the transverse bore by a locking screw.
Ein Leistungsschalter mit den genannten Merkmalen ist im wesentlichen durch die DE 44 16 105 Cl bekanntgeworden. Die Sperrschraube steht dabei mit dem Lagerbolzen in leitender Verbindung. Hierdurch gehört nicht nur der mit dem Treibhebel in Berührung stehende Lagerbolzen, sondern auch dieA circuit breaker with the features mentioned has become known essentially from DE 44 16 105 Cl. The locking screw is in a conductive connection with the bearing pin. This not only includes the bearing pin in contact with the drive lever, but also the one
Sperrschraube zu den Elementen, die das elektrische Feld innerhalb des Kontakthebelträgers gestalten. In diesem Zusammenhang liegt der Erfindung die Aufgabe zugrunde, die dielektrische Festigkeit der bewegbaren Kontaktanordnung zu steigern und hierdurch bei gegebenen Abmessungen die Sicherheit gegen elektrische Fehler zu verbessern.Locking screw to the elements that form the electrical field within the contact lever carrier. In this context, the object of the invention is to increase the dielectric strength of the movable contact arrangement and thereby to improve the security against electrical errors for given dimensions.
Gemäß der Erfindung wird die genannte Aufgabe dadurch gelöst, daß an dem Kontakthebelträger ein den Lagerbolzen axial blockierendes, aus isolierendem Kunststoff bestehendes Sperrstück mittels der Sperrschraube befestigt ist. Auf dieseAccording to the invention, the above object is achieved in that an axially blocking the bearing bolt, consisting of insulating plastic on the contact lever carrier Locking piece is attached by means of the locking screw. To this
Weise wird die den Lagerbolzen aufnehmende Querbohrung desWay, the bearing pin receiving the transverse bore
Kontakthebelträgers mit einem isolierenden Teil, nämlich durch das Sperrstück, verschlossen. Hierdurch werden die Kriechwege an dem Kontakthebelträger vergrößert.Contact lever carrier closed with an insulating part, namely by the locking piece. This increases the creepage distances on the contact lever carrier.
Eine weitere dielektrische Verbesserung ist dadurch zu er¬ reichen, daß die Sperrschraube in eine rechtwinklig zu der Querbohrung angeordnete Aufnahmeöffnung eingreifend und in einem Abstand von dem Lagerbolzen endend angeordnet ist. Im Unterschied zu der bisherigen Gestaltung des Kontakthebel- trägers wirkt daher die Schraube nicht mehr als auf Erdpotential befindliche Elektrode.A further dielectric improvement can be achieved in that the locking screw engages in a receiving opening arranged at right angles to the transverse bore and ends at a distance from the bearing pin. In contrast to the previous design of the contact lever carrier, the screw therefore no longer acts as an electrode at earth potential.
Das Sperrstück für den Lagerbolzen kann als Schutzorgan zur Abdeckung einer den Zugang zu dem Kopfstück des Lagerbolzens gewährenden Montageöffnung des Kontakthebelträgers ausge¬ bildet sein. Diese Maßnahme wirkt gleichfalls im Sinne einer Vergrößerung der Kriechwege.The locking piece for the bearing pin can be designed as a protective element for covering an assembly opening of the contact lever carrier which provides access to the head piece of the bearing pin. This measure also works in the sense of increasing the creepage distances.
Ferner kann das Sperrstück eine Rippe zur gegenseitigen Abstützung eines dem Kopfstück des Lagerbolzens vorgelagerten Sperrsteges und eines die Montageöffnung ausfüllenden Verschlußschenkels aufweisen. Die Rippe wirkt als Versteifung und gestattet daher die Herstellung des Sperrstückes als leichtes Kunststoff-Formteil.Furthermore, the locking piece can have a rib for mutual support of a locking web located in front of the head piece of the bearing pin and a locking leg filling the assembly opening. The rib acts as a stiffener and therefore allows the locking piece to be manufactured as a light plastic molded part.
Die Erfindung wird im folgenden anhand der Figuren näher erläutert. Die Figur 1 zeigt in schematischer Darstellung einenThe invention is explained in more detail below with reference to the figures. Figure 1 shows a schematic representation
Niederspannungs-Leistungsschalter im Schnitt.Low-voltage circuit breakers on average.
Die Figur 2 zeigt einen in der Figur 1 dargestellten Kontakt- hebelträger in größerem Maßstab und teilweise im Schnitt.FIG. 2 shows a contact lever support shown in FIG. 1 on a larger scale and partly in section.
Die Figur 3 ist eine Darstellung des Schnittes III-III in Figur 2.FIG. 3 is an illustration of section III-III in FIG. 2.
Der in der Figur 1 schematisch dargestellte Niederspannungs- Leistungsschalter 1 weist eine bewegbare Kontaktanordnung 2 auf, zu der eine Anschlußschiene 3, biegsame Strombänder 4 und wenigstens ein bewegbarer Kontakthebel 5 gehören. Ein Kontakthebelträger 6 ist durch eine Antriebsvorrichtung 7, eine hiervon betätigte Schaltwelle 10 sowie Treibhebel 11 zum Ein- und Ausschalten schwenkbar. Der bewegbare Kontakthebel 5 wirkt dabei mit einem ortsfesten Gegenkontakt 12 zusammen, der mit einer weiteren Anschlußschiene 13 in Verbindung steht.The low-voltage circuit breaker 1 shown schematically in FIG. 1 has a movable contact arrangement 2, which includes a connecting bar 3, flexible current strips 4 and at least one movable contact lever 5. A contact lever carrier 6 can be pivoted by a drive device 7, a shift shaft 10 actuated thereby and drive lever 11 for switching on and off. The movable contact lever 5 cooperates with a stationary counter contact 12 which is connected to a further connecting rail 13.
Einzelheiten der Verbindung des Treibhebels 11 mit dem Kontakthebelträger 6 werden im folgenden anhand der Figuren 2 und 3 näher beschrieben. In diesen Figuren ist eine an der Oberseite des Kontakthebelträgers 6 zugängliche Montage- Öffnung 14 gezeigt, in der sich ein Sperrstück 15 befindet. In einer Querbohrung 16 des Kontakthebelträgers 6 befindet sich ein Lagerbolzen 17, der eine Lageröffnung des Treib¬ hebels 11 durchsetzt. In der Figur 3 ist angedeutet, daß zwei parallele Treibhebel 11 zur Kraftübertragung auf den Kon- takthebelträger 6 vorgesehen sind. Ein Sperrsteg 20 des Sperrstückes 15 befindet sich vor einem Kopfstück 21 desDetails of the connection of the drive lever 11 to the contact lever carrier 6 are described in more detail below with reference to FIGS. 2 and 3. In these figures, a mounting opening 14 is shown on the top of the contact lever carrier 6, in which a locking piece 15 is located. In a transverse bore 16 of the contact lever carrier 6 there is a bearing pin 17 which passes through a bearing opening of the drive lever 11. It is indicated in FIG. 3 that two parallel drive levers 11 are provided for the power transmission to the contact lever carrier 6. A barrier 20 of the Locking piece 15 is located in front of a head piece 21 of the
Lagerbolzens 17 und sichert diesen gegen axiale Verschiebung in der Querbohrung 16.Bearing pin 17 and secures it against axial displacement in the transverse bore 16.
Eine Sperrschraube 22 greift in eine Aufnahmeöffnung 23 des Kontakthebelträgers 6 ein und durchsetzt eine Durchgangs¬ öffnung eines Verschlußschenkels 24 des Sperrstückes 15. Wie insbesondere der Figur 3 zu entnehmen ist, füllt der Verschlußschenkel 24 des Sperrstückes 15 die Montageöffnung 14 des Kontakthebelträgers 6 aus.A locking screw 22 engages in a receiving opening 23 of the contact lever carrier 6 and passes through a through opening of a locking leg 24 of the locking piece 15. As can be seen in particular from FIG. 3, the locking leg 24 of the locking piece 15 fills the mounting opening 14 of the contact lever carrier 6.
Eine Rippe 26 erstreckt sich zwischen dem Verschlußschenkel 24 und dem Sperrsteg 20. Über einen Teil seiner Länge liegt die Rippe 26 an einer die Montageöffnung 14 begrenzenden Wandfläche 25 des Kontakthebelträgers 6 an. Von dem Lager¬ bolzen 17 evtl. ausgehende Axialkräfte werden damit unter Umgehung der Sperrschraube 22 direkt in den Kontakthebel- träger 6 eingeleitet.A rib 26 extends between the locking leg 24 and the locking web 20. The rib 26 lies over part of its length against a wall surface 25 of the contact lever carrier 6 delimiting the mounting opening 14. Axial forces which may arise from the bearing bolt 17 are thus introduced directly into the contact lever carrier 6, bypassing the locking screw 22.
Wie insbesondere die Figur 3 erkennen läßt, ist die Ver¬ bindung zwischen dem Kontakthebelträger 6 und den Treibhebel 11 auf einfache Weise durch Einschieben des Lagerbolzens 17 in die Querbohrung 16 herzustellen. Hierzu ist die Montage¬ öffnung 14 mit einer seitlichen Mündung 27 versehen. An- schließend wird das Sperrstück 15 von oben in die Montage¬ öffnung 14 eingelegt, was nur dann möglich ist, wenn der Sperrsteg 20 an dem Kopfstück 21 des Lagerbolzens 17 vor¬ beitreten kann. Anschließend wird die Sperrschraube 22 gleichfalls von oben in die Montageöffnung 14 eingeführt. Die Sperrschraube 22 besitzt eine solche Länge, daß eine aus- reichende Befestigung erzielt wird, jedoch noch ein Abstand zu dem Lagerbolzen 17 besteht. Damit kann die SperrschraubeAs can be seen in particular in FIG. 3, the connection between the contact lever carrier 6 and the drive lever 11 can be established in a simple manner by inserting the bearing bolt 17 into the transverse bore 16. For this purpose, the assembly opening 14 is provided with a lateral mouth 27. The locking piece 15 is then inserted into the mounting opening 14 from above, which is only possible if the locking bar 20 can join the head piece 21 of the bearing pin 17. Then the locking screw 22 is also inserted into the mounting opening 14 from above. The locking screw 22 is of such a length that a reaching fastening is achieved, but there is still a distance from the bearing pin 17. So that the locking screw
22 nicht in leitende Verbindung mit dem Lagerbolzen 17 gelangen, der seinerseits über die Treibhebel 11 mit der auf22 do not come into conductive connection with the bearing pin 17, which in turn on the drive lever 11 with the
Erdpotential befindlichen Antriebsvorrichtung 7 steht. DieGrounding drive device 7 is. The
Sperrschraube 22 kann somit nicht als Elektrode wirken. Locking screw 22 can therefore not act as an electrode.

Claims

Patentansprüche claims
1. Elektrischer Leistungsschalter (1) mit einer bewegbaren Kontaktanordnung (2) und mit einer die Kontaktanordnung (2) zum Ein- und Ausschalten betätigenden Antriebsvorrichtung1. Electrical circuit breaker (1) with a movable contact arrangement (2) and with a contact arrangement (2) for switching on and off actuating drive device
(7) , die mit der Kontaktanordnung (2) durch einen Treibhebel (11) gelenkig verbunden ist, wobei in einem isolierenden Kontakthebelträger (6) der Kontaktanordnung (2) eine Querbohrung (16) zur Aufnahme eines den Treibhebel (11) mit der Kontaktanordnung (2) verbindenden Lagerbolzens (17) angeordnet ist und der Lagerbolzen (17) gegen Entfernung aus der Querbohrung (16) durch eine Sperrschraube (22) gesichert ist, d a d u r c h g e k e n n z e i c h n e t , daß an dem Kontakthebelträger (6) ein den Lagerbolzen (17) axial blockierendes, aus isolierendem Kunststoff bestehendes Sperrstück (15) mittels der Sperrschraube (22) befestigt ist.(7), which is connected to the contact arrangement (2) in an articulated manner by a drive lever (11), a transverse bore (16) for receiving a drive lever (11) with the contact arrangement in an insulating contact lever carrier (6) of the contact arrangement (2) (2) connecting bearing pin (17) is arranged and the bearing pin (17) is secured against removal from the transverse bore (16) by a locking screw (22), characterized in that on the contact lever carrier (6) axially blocking the bearing pin (17) , locking piece (15) made of insulating plastic is fastened by means of the locking screw (22).
2. Leistungsschalter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die2. Circuit breaker according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the
Sperrschraube (22) in eine rechtwinklig zu der Querbohrung (16) angeordnete Aufnahmeöffnung (23) eingreifend und in einem Abstand von dem Lagerbolzen (17) endend angeordnet ist,Locking screw (22) engages in a receiving opening (23) arranged at right angles to the transverse bore (16) and is arranged at a distance from the bearing pin (17),
3. Leistungsschalter nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß das Sperrstück (15) als Schutzorgan zur Abdeckung einer den Zugang zu einem Kopfstück (21) des Lagerbolzens (17) gewährenden Montageöffnung (14) des Kontakthebelträgers (6) ausgebildet ist. 3. Circuit breaker according to claim 1 or 2, characterized in that the locking piece (15) is designed as a protective member for covering an access opening to a head piece (21) of the bearing bolt (17) providing the mounting opening (14) of the contact lever carrier (6).
4. Leistungsschalter nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , daß das Sperrstück (15) eine Rippe (26) zur gegenseitigen Abstützung eines dem Kopfstück (21) des Lagerbolzens (17) vorgelagerten Sperrsteges (20) und eines die Montageöffnung (14) aus¬ füllenden Verschlußschenkels (24) aufweist. 4. Circuit breaker according to claim 3, characterized in that the locking piece (15) has a rib (26) for mutual support of the head piece (21) of the bearing pin (17) upstream locking bar (20) and a mounting opening (14) filling closure leg (24).
EP97915338A 1996-03-08 1997-02-28 Power switch with insulating contact lever carrier Expired - Lifetime EP0885449B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29605081U DE29605081U1 (en) 1996-03-08 1996-03-08 Circuit breaker with isolating contact lever carrier
DE29605081U 1996-03-08
PCT/DE1997/000436 WO1997033290A2 (en) 1996-03-08 1997-02-28 Power switch with insulating contact lever carrier

Publications (2)

Publication Number Publication Date
EP0885449A1 true EP0885449A1 (en) 1998-12-23
EP0885449B1 EP0885449B1 (en) 1999-09-01

Family

ID=8021325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97915338A Expired - Lifetime EP0885449B1 (en) 1996-03-08 1997-02-28 Power switch with insulating contact lever carrier

Country Status (4)

Country Link
EP (1) EP0885449B1 (en)
DE (2) DE29605081U1 (en)
IN (1) IN191379B (en)
WO (1) WO1997033290A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836754B4 (en) * 1998-08-13 2006-10-05 Aeg Niederspannungstechnik Gmbh & Co Kg Switch shaft unit for switches
DE10127552B4 (en) * 2001-06-01 2007-01-04 Siemens Ag Method for coupling the switching shaft of a low-voltage circuit breaker with a movable contact carrier
KR200438185Y1 (en) * 2006-12-29 2008-01-29 엘에스산전 주식회사 Apparatus for connecting link pin of circuit breaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3679291D1 (en) * 1985-10-31 1991-06-20 Merlin Gerin KINEMATIC TRANSMISSION CHAIN BETWEEN THE CONTROL MECHANISM AND THE POLES OF AN ELECTRIC LOAD SWITCH WITH A SPRAYED INSULATION HOUSING.
DE4416105C1 (en) * 1994-04-19 1995-05-24 Siemens Ag LV power switch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9733290A2 *

Also Published As

Publication number Publication date
IN191379B (en) 2003-11-29
WO1997033290A3 (en) 2001-09-13
WO1997033290A2 (en) 1997-09-12
DE59700394D1 (en) 1999-10-07
DE29605081U1 (en) 1996-06-05
EP0885449B1 (en) 1999-09-01

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