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DE29503327U1 - Contact lever assembly for a low voltage circuit breaker - Google Patents

Contact lever assembly for a low voltage circuit breaker

Info

Publication number
DE29503327U1
DE29503327U1 DE29503327U DE29503327U DE29503327U1 DE 29503327 U1 DE29503327 U1 DE 29503327U1 DE 29503327 U DE29503327 U DE 29503327U DE 29503327 U DE29503327 U DE 29503327U DE 29503327 U1 DE29503327 U1 DE 29503327U1
Authority
DE
Germany
Prior art keywords
contact
lever assembly
spacer
contact 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.)
Expired - Lifetime
Application number
DE29503327U
Other languages
German (de)
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Priority to DE29503327U priority Critical patent/DE29503327U1/en
Publication of DE29503327U1 publication Critical patent/DE29503327U1/en
Priority to EP19960250034 priority patent/EP0727805B1/en
Priority to DE59611326T priority patent/DE59611326D1/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H01H2001/228—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars with insulating spacers between the contact bars
    • 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
    • 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
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Landscapes

  • Breakers (AREA)
  • Switches With Compound Operations (AREA)

Description

Kontakthebelbaugruppe für einen Niederspannungs-Leistungsschalter
5Contact lever assembly for a low-voltage circuit breaker
5

Die Erfindung betrifft eine Kontakthebelbaugruppe für einen Niederspannungs-Leistungsschalter mit einem Träger aus Isolierstoff und mit mehreren an dem Träger parallel zueinander mit gegenseitigem Abstand angeordneten und schwenbkar gelagerten Kontakthebeln. Eine Kontakthebelbaugruppe dieser Art ist z. B. durch die EP 0 410 902 Al bekanngtgeworden. Eine der Möglichkeiten, den gegenseitigen Abstand der Kontakthebel aufrechtzuerhalten, bestecht darin, an dem Träger Rippen oder Stege anzuformen, die zwischen die Kontakthebel eingreifen. Dabei besteht die Schwierigkeit, daß der zur Herstellung des Trägers benutzte Kunststoff es nicht zuläßt, die Stege mit einer gewünschten geringen Wandstärke herzustellen.The invention relates to a contact lever assembly for a low-voltage circuit breaker with a carrier made of insulating material and with several contact levers arranged parallel to one another at a distance from one another and pivotably mounted on the carrier. A contact lever assembly of this type has become known, for example, from EP 0 410 902 A1. One of the possibilities for maintaining the mutual distance between the contact levers is to form ribs or webs on the carrier which engage between the contact levers. The difficulty here is that the plastic used to produce the carrier does not allow the webs to be produced with the desired low wall thickness.

Der Erfindung liegt die Aufgabe zugrunde, die Breite der Kontakthebelbaugruppe auf ein notwendiges Maß zu beschränken und hierzu den Abstand der Kontakthebel lediglich mit Rücksicht auf die gewünschte gegenseitige Isolation zu bemessen.The invention is based on the object of limiting the width of the contact lever assembly to a necessary dimension and, for this purpose, measuring the distance between the contact levers only with regard to the desired mutual insulation.

2525

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß zur Aufrechterhaltung des gegenseitigen Abstandes der Kontakthebel an dem Träger ein gleichfalls aus isolierendem Kunststoff bestehender, jedoch gesondert hergestellter Abstandshalter angebracht ist, der zwischen die Kontakthebel eingreifende Trennstege aufweist.This object is achieved according to the invention in that, in order to maintain the mutual distance between the contact levers, a spacer is attached to the carrier, which is also made of insulating plastic but is manufactured separately and has separating webs engaging between the contact levers.

Die Einbeziehung der Trennstege in einen gesonderten Körper gibt die Möglichkeit, eine zur Herstellung geringer Wandstärken besser geeigneten Kunststoff, insbesondere einen thermoplastischen Kunststoff, einzusetzen. Zur HerstellungThe inclusion of the separating webs in a separate body makes it possible to use a plastic that is better suited to the production of thin walls, in particular a thermoplastic.

95640359564035

des Trägers eignet sich demgegenüber ein mit Füllstoffen versetzter duroplastischer Kunststoff, der eine wesentlich höhere Festigkeit erreicht. Diese ist jedoch für die Trennstege nicht erforderlich.
5In contrast, a thermosetting plastic with fillers is suitable for the carrier, as it achieves a much higher strength. However, this is not necessary for the dividers.
5

Im Rahmen der Erfindung kann der Abstandshalter über Seitenflächen des Trägers greifende Wangen besitzen, die eine zur Aufnahme eines Lagerbolzens der Kontakthebel dienende Bohrung überdecken und hierdurch den Lagerbolzen gegen axiale Verschiebung sichern. Auf diese Weise wird die Montage der Kontakthebelbaugruppe erleichtert.Within the scope of the invention, the spacer can have cheeks that engage over side surfaces of the carrier, cover a hole used to accommodate a bearing pin of the contact lever and thereby secure the bearing pin against axial displacement. In this way, the assembly of the contact lever assembly is made easier.

Ferner kann der Abstandshalter einen in Richtung eines mit den Kontakthebeln zusammenwirkenden Gegenkontakt vorspringende Nase aufweisen. Diese bewirkt eie Abdichtung des Schalträumes des Leistungsschalter gegen ein Entwichung von Schaltgasen in einer unerwünschten Richtung.Furthermore, the spacer can have a nose that protrudes in the direction of a counter contact that interacts with the contact levers. This seals the switching chamber of the circuit breaker against the escape of switching gases in an undesirable direction.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below with reference to the embodiment shown in the figures.

Die Figur 1 zeigt eine Kontakthebelbaugruppe teilweise im Schnitt.Figure 1 shows a contact lever assembly partially in section.

Die Figur 2 ist eine Ansicht der Kontakthebelbaugruppe gemäß der Figur 1 mit Blick auf einen Abstandshalter.Figure 2 is a view of the contact lever assembly according to Figure 1 looking towards a spacer.

Ein Abstandshalter ist gesondert in der Figur 3 in der Draufsicht und in der Figur 4 im Schnitt dargestellt.A spacer is shown separately in Figure 3 in plan view and in Figure 4 in section.

Die in den Figuren 1 und 2 gezeigte Kontakthebe!baugruppe 1 weist einen Träger 2 aus isolierendem Kunststoff für parallel zueinander angeordnete Kontakthebel 3 auf. Ein Lagerbolzen durchsetzt die Kontakthebel 3 sowie Seitenwände 5, die den Träger 2 zwischen sich einfassen.The contact lifting assembly 1 shown in Figures 1 and 2 has a carrier 2 made of insulating plastic for contact levers 3 arranged parallel to one another. A bearing bolt passes through the contact levers 3 and side walls 5, which enclose the carrier 2 between them.

95640359564035

Wie näher die Figuren 3 und 4 zeigen, besitzt ein Abstandshalter 6 dünne Trennstege 7, die zwischen die Kontakthebel 3 eingreifen. Hierdurch werden die Kontakthebel 3 in dem erwünschten geringen gegenseitigen Abstand gehalten. Seitliehe Wangen 10 des Abstandshalters 6 übergreifen die Seitenwände 5 derart, daß auch die Bohrungen überdeckt werden, in denen der Lagerbolzen 4 (Figur 1) aufgenommen ist. Öffnungen 11 in den Wangen 10 dienen zur Befestigung des Abstandshalters 6 mittels Schrauben 12 {Figur 1). Ausnehmungen 9 der Trennstege 7 gestatten den Durchtritt des Lagerbolzens 4.As shown in more detail in Figures 3 and 4, a spacer 6 has thin separating webs 7 that engage between the contact levers 3. This keeps the contact levers 3 at the desired small distance from one another. Lateral cheeks 10 of the spacer 6 overlap the side walls 5 in such a way that the holes in which the bearing pin 4 (Figure 1) is accommodated are also covered. Openings 11 in the cheeks 10 serve to fasten the spacer 6 using screws 12 (Figure 1). Recesses 9 in the separating webs 7 allow the bearing pin 4 to pass through.

In den Figuren 1, 3 und 4 ist ferner eine Nase 13 des Abstandshalters 6 gezeigt. Die Nase 13 erstreckt sich über die gesamte Breite des Abstandshalters 6 und springt in Richtung eines Gegenkontaktes vor, mit dem die Kontakthebel 3 zusammenwirken. Beim Öffnen der Schaltkontakte verhindert die Nase 13, daß die von dem Schaltlichtbogen ausgehenden Schaltgase entgegen der gewünschten Richtung entweichen. Damit wird die Bewegung des Schaltlichtbogens in Richtung der oberhalb der Kontakthebelbaugruppe 1 befindlichen Löschkammer des Leistungsschalters beschleunigt.Figures 1, 3 and 4 also show a nose 13 of the spacer 6. The nose 13 extends over the entire width of the spacer 6 and projects in the direction of a counter contact with which the contact levers 3 interact. When the switching contacts are opened, the nose 13 prevents the switching gases emanating from the switching arc from escaping in the opposite direction to the desired direction. This accelerates the movement of the switching arc in the direction of the arcing chamber of the circuit breaker located above the contact lever assembly 1.

Dadurch, daß der Abstandshalter 6 als gesondertes Teil hergestellt ist, kann ein Kunststoff benutzt werden,der sich besonders zur Herstellung dünner Trennstege eignet. Dies ist durch die Verwendung eines thermoplastischen Kunststoffes möglich. Dieser ergibt auch eine relativ gute Biegsamkeit unter dem Einfluß seitlicher Kräfte ohne die Gefahr einer Beschädigung. Dies hat zur Folge, daß die bei hohen Strömen evtl. auftretenden hohen Seitenkräfte ohne Schaden für den Abstandshalter zu den Seitenwänden des Trägers 2 geleitet und von diesem aufgenommen werden. Hierzu ist der Träger dadurch geeignet, daß er aus einem anderen, vorzugsweise mit einem Füllstoff versetzten duroplastischen Kunststoff hergestellt ist.Because the spacer 6 is manufactured as a separate part, a plastic can be used that is particularly suitable for producing thin separating webs. This is possible by using a thermoplastic. This also results in relatively good flexibility under the influence of lateral forces without the risk of damage. This means that the high lateral forces that may occur with high currents are directed to the side walls of the carrier 2 and absorbed by it without damaging the spacer. The carrier is suitable for this because it is manufactured from another thermosetting plastic, preferably mixed with a filler.

Claims (4)

95G4035 Schutzansprüche95G4035 Protection claims 1. Kontakthebelbaugruppe (1) für einen Niederspannungs-Leistungsschalter mit einem Träger (2) aus Isolierstoff und mit mehreren an dem Träger (2) parallel zueinander mit gegenseitigen Abstand angeordneten und schwenkbar gelagerten Kontakthebeln {3),1. Contact lever assembly (1) for a low-voltage circuit breaker with a carrier (2) made of insulating material and with several contact levers {3) arranged parallel to one another on the carrier (2) with mutual spacing and pivotably mounted, dadurch gekennzeichnet , daß zur Aufrechterhaltung des gegenseitigen Abstandes der Kontakthebel (3) an dem Träger (2) ein gleichfalls aus isolierendem Kunststoff bestehender, jedoch gesondert hergestellter Abstandshalter (6) angebracht ist, der zwischen die Kontakthebel (3) eingreifende Trennstege (7) aufweist.characterized in that, in order to maintain the mutual distance between the contact levers (3), a spacer (6) is attached to the carrier (2), which is also made of insulating plastic but is manufactured separately and has separating webs (7) engaging between the contact levers (3). 2. Kontakthebelbaugruppe nach Anspruch 1, dadurch gekennzeichnet , daß der Abstandshalter (6) aus einem thermoplastischen Kunststoff besteht.2. Contact lever assembly according to claim 1, characterized in that the spacer (6) consists of a thermoplastic material. 0 3 . Kontakthebelbaugruppe nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß der Abstandshalter (6) über Seitenwände {5} des Trägers (2) greifende Wangen (10) besitzt, die eine zur Aufnahme eines Lagerbolzens (4) der Kontakthebel (3) dienende Bohrung überdecken und hierdurch den Lagerbolzen (4) gegen axiale Verschiebung sichern.0 3. Contact lever assembly according to claim 1 or 2, characterized in that the spacer (6) has cheeks (10) which engage over side walls {5} of the carrier (2) and cover a bore serving to receive a bearing pin (4) of the contact lever (3) and thereby secure the bearing pin (4) against axial displacement. 4. Kontakthebelbaugruppe nach einem der vorangehenden Ansprüche,4. Contact lever assembly according to one of the preceding claims, dadurch gekennzeichnet , daß der Abstandshalter (6) eine in Richtung eines mit den Kontakthebeln (2) zusammenwirkenden Gegenkontaktes vorspringende Nase (13) aufweist.characterized in that the spacer (6) has a nose (13) projecting in the direction of a counter-contact cooperating with the contact levers (2).
DE29503327U 1995-02-16 1995-02-16 Contact lever assembly for a low voltage circuit breaker Expired - Lifetime DE29503327U1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE29503327U DE29503327U1 (en) 1995-02-16 1995-02-16 Contact lever assembly for a low voltage circuit breaker
EP19960250034 EP0727805B1 (en) 1995-02-16 1996-02-09 Contact lever unit for low voltage circuit breaker
DE59611326T DE59611326D1 (en) 1995-02-16 1996-02-09 Contact lever assembly for a low voltage circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29503327U DE29503327U1 (en) 1995-02-16 1995-02-16 Contact lever assembly for a low voltage circuit breaker

Publications (1)

Publication Number Publication Date
DE29503327U1 true DE29503327U1 (en) 1995-04-13

Family

ID=8004592

Family Applications (2)

Application Number Title Priority Date Filing Date
DE29503327U Expired - Lifetime DE29503327U1 (en) 1995-02-16 1995-02-16 Contact lever assembly for a low voltage circuit breaker
DE59611326T Expired - Lifetime DE59611326D1 (en) 1995-02-16 1996-02-09 Contact lever assembly for a low voltage circuit breaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59611326T Expired - Lifetime DE59611326D1 (en) 1995-02-16 1996-02-09 Contact lever assembly for a low voltage circuit breaker

Country Status (2)

Country Link
EP (1) EP0727805B1 (en)
DE (2) DE29503327U1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629482C1 (en) * 1996-07-12 1997-09-11 Siemens Ag Low-voltage (LV) circuit breaker switch contact design
WO1998008240A1 (en) * 1996-08-21 1998-02-26 Siemens Aktiengesellschaft Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
WO1998009306A1 (en) * 1996-08-28 1998-03-05 Siemens Aktiengesellschaft Mobile switching device with a support accommodating contact levers
WO1998010451A1 (en) * 1996-09-05 1998-03-12 Siemens Aktiengesellschaft Low-voltage circuit breaker with a drive device
WO2002027740A1 (en) * 2000-09-27 2002-04-04 Siemens Aktiengesellschaft Displaceable contact support for a low-voltage power switch with a separator for the contact levers
EP2187421A1 (en) * 2007-08-08 2010-05-19 Changshu Switchgear Mfg. Co., Ltd. (FORMER CHANGSHU SWITCHGEAR PLANT) Moving contact of circuit breaker

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806944C1 (en) * 1998-02-19 1999-06-24 Goerlitz Esg Gmbh LV protection switch
US5899323A (en) * 1998-05-07 1999-05-04 Eaton Corporation Electrical switching apparatus with contact finger guide
DE10132127C1 (en) * 2001-06-28 2002-11-14 Siemens Ag Movable contact carrier for LV switchgear has compression pressure used for thickness calibration of each sandwich structure provided by contact lever and associated spacer
DE102004009873A1 (en) * 2004-02-26 2005-09-15 Siemens Ag Switching contact arrangement
DE102004020654A1 (en) 2004-04-22 2005-11-10 Siemens Ag Switching contact arrangement
DE102005009484A1 (en) * 2005-02-23 2006-09-14 Siemens Ag Contact lever assembly for a low voltage circuit breaker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002439B (en) * 1954-06-14 1957-02-14 Voigt & Haeffner Ag Contact arrangement, especially for circuit breakers with upstream and main contacts
US3560683A (en) * 1968-01-24 1971-02-02 Westinghouse Electric Corp Circuit breaker with improved contact structure
FR2484136A1 (en) * 1980-06-06 1981-12-11 Merlin Gerin Contact element for high current LV circuit breaker - has movable contact plates which are joined by brazing of contact head and shunt at opposite ends of body
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.
FR2650434B1 (en) * 1989-07-26 1995-11-24 Merlin Gerin LOW VOLTAGE CIRCUIT BREAKER WITH MULTIPLE CONTACTS AND HIGH CURRENTS

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629482C1 (en) * 1996-07-12 1997-09-11 Siemens Ag Low-voltage (LV) circuit breaker switch contact design
WO1998008240A1 (en) * 1996-08-21 1998-02-26 Siemens Aktiengesellschaft Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
US6188031B1 (en) 1996-08-21 2001-02-13 Siemens Aktiengesellschaft Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
WO1998009306A1 (en) * 1996-08-28 1998-03-05 Siemens Aktiengesellschaft Mobile switching device with a support accommodating contact levers
US6225585B1 (en) 1996-08-28 2001-05-01 Siemens Ag Movable switch contact arrangement having a contact lever holder with a contact lever
WO1998010451A1 (en) * 1996-09-05 1998-03-12 Siemens Aktiengesellschaft Low-voltage circuit breaker with a drive device
WO2002027740A1 (en) * 2000-09-27 2002-04-04 Siemens Aktiengesellschaft Displaceable contact support for a low-voltage power switch with a separator for the contact levers
EP2187421A1 (en) * 2007-08-08 2010-05-19 Changshu Switchgear Mfg. Co., Ltd. (FORMER CHANGSHU SWITCHGEAR PLANT) Moving contact of circuit breaker
EP2187421A4 (en) * 2007-08-08 2013-05-15 Changshu Switchgear Mfg Co Ltd Moving contact of circuit breaker

Also Published As

Publication number Publication date
EP0727805A2 (en) 1996-08-21
EP0727805A3 (en) 1999-07-21
EP0727805B1 (en) 2006-01-25
DE59611326D1 (en) 2006-04-13

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R207 Utility model specification

Effective date: 19950524

R150 Utility model maintained after payment of first maintenance fee after three years

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R151 Utility model maintained after payment of second maintenance fee after six years

Effective date: 20010621

R152 Utility model maintained after payment of third maintenance fee after eight years

Effective date: 20030506

R071 Expiry of right