EP0876675B1 - Electrical switching device - Google Patents

Electrical switching device Download PDF

Info

Publication number
EP0876675B1
EP0876675B1 EP97901046A EP97901046A EP0876675B1 EP 0876675 B1 EP0876675 B1 EP 0876675B1 EP 97901046 A EP97901046 A EP 97901046A EP 97901046 A EP97901046 A EP 97901046A EP 0876675 B1 EP0876675 B1 EP 0876675B1
Authority
EP
European Patent Office
Prior art keywords
contact
state
switching device
distance
short
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
EP97901046A
Other languages
German (de)
French (fr)
Other versions
EP0876675A1 (en
Inventor
Reinhard Herbst
Bardo Koppmann
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
Priority claimed from DE19602118A external-priority patent/DE19602118C2/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP97901046A priority Critical patent/EP0876675B1/en
Publication of EP0876675A1 publication Critical patent/EP0876675A1/en
Application granted granted Critical
Publication of EP0876675B1 publication Critical patent/EP0876675B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts

Definitions

  • the invention relates to an electrical switching device with an electromagnetic system, with an arc chamber, with fixed contacts, with a contact bridge with movable Contacts, with a contact carrier with a window in which the contact bridge via a contact spring with the installation dimension C is held, with the electromagnet system in the OFF state the fixed contacts a distance ⁇ from the moving contacts have and being in the ON state of the electromagnetic system the contact spring experiences a pressure D, so that the Contact carrier between ON and OFF state and vice versa Distance D + ⁇ covered.
  • a generic switching device is DE 41 04 533 C2 remove. Occurs with this switching device in the ON state Short circuit on, so there are short-circuit current forces at the contact bridge effective that the contact bridge in the open position move.
  • the contact spring is down to the block dimension pressed together and then the contact carrier torn up. The forces that occur can affect the contact carrier to have a destructive effect.
  • the invention has for its object an electrical To create switching device of the type mentioned above, in which destructive stresses on the contact carrier as a result be avoided by short-circuit current forces.
  • FIG. 1 shows a contact system of an electromagnetic Switchgear shown. It's not closer in one here Arc chamber shown with quenching plates 1 housed and essentially from fixed contacts 2, movable Contacts 3 on a contact bridge 4, a contact carrier 5 with a window 6 and a contact spring 7 assembled. In the present OFF state of the electromagnetic system presses the contact spring 7, the contact bridge 4 on the lower edge of the window 6 and has an installation dimension of length C. Die movable contacts 3 are at a distance ⁇ from the fixed contacts 2 located. On the side facing away from the fixed contacts 2 the contact bridge 4 are at a distance A from this stop 8 provided with the arcing chamber advantageously firmly connected, e.g. are molded onto this.
  • the contact carrier 5 is around by the magnet armature, not shown here moves the path D + ⁇ downwards from the ON state, with D the pressure of the contact spring 7 in the ON state is designated.
  • the contact bridge 4 has in this position the distance A + ⁇ from the stops 8.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung bezieht sich auf ein elektrisches Schaltgerät mit einem Elektromagnetsystem, mit einer Lichtbogenkammer, mit Festkontakten, mit einer Kontaktbrücke mit beweglichen Kontakten, mit einem Kontaktträger mit einem Fenster, in dem die Kontaktbrücke über eine Kontaktfeder mit dem Einbaumaß C gehalten ist, wobei im AUS-Zustand des Elektromagnetsystems die Festkontakte einen Abstand Ö von den beweglichen Kontakten aufweisen und wobei im EIN-Zustand des Elektromagnetsystems die Kontaktfeder einen Durchdruck D erfährt, so daß der Kontaktträger zwischen EIN- und AUS-Zustand und umgekehrt den Weg D + Ö zurücklegt.The invention relates to an electrical switching device with an electromagnetic system, with an arc chamber, with fixed contacts, with a contact bridge with movable Contacts, with a contact carrier with a window in which the contact bridge via a contact spring with the installation dimension C is held, with the electromagnet system in the OFF state the fixed contacts a distance Ö from the moving contacts have and being in the ON state of the electromagnetic system the contact spring experiences a pressure D, so that the Contact carrier between ON and OFF state and vice versa Distance D + Ö covered.

Ein gattungsgemäßes Schaltgerät ist der DE 41 04 533 C2 zu entnehmen. Tritt bei diesem Schaltgerät im EIN-Zustand ein Kurzschluß auf, so werden an der Kontaktbrücke Kurzschlußstromkräfte wirksam, die die Kontaktbrücke in Öffnungsstellung bewegen. Dabei wird die Kontaktfeder bis auf Blockmaß zusammengedrückt und danach der Kontakttrager nach oben gerissen. Die dabei auftretenden Kräfte können auf den Kontakttrager zerstörerisch einwirken.A generic switching device is DE 41 04 533 C2 remove. Occurs with this switching device in the ON state Short circuit on, so there are short-circuit current forces at the contact bridge effective that the contact bridge in the open position move. The contact spring is down to the block dimension pressed together and then the contact carrier torn up. The forces that occur can affect the contact carrier to have a destructive effect.

Daher liegt der Erfindung die Aufgabe zugrunde, ein elektrisches Schaltgerät der oben genannten Art zu schaffen, bei dem zerstörerische Beanspruchungen des Kontaktträgers in Folge von Kurzschlußstromkräften vermieden werden.Therefore, the invention has for its object an electrical To create switching device of the type mentioned above, in which destructive stresses on the contact carrier as a result be avoided by short-circuit current forces.

Diese Aufgabe wird dadurch erreicht, daß an der den Festkontakten der Kontaktbrücke abgewandten Seite Anschläge an der Lichtbogenkammer vorgesehen sind, die von der Kontaktbrücke im AUS-Zustand einen solchen Abstand A aufweisen, daß sie im Kurzschlußfall bei eingeschaltetem Elektromagnetsystem die durch die Kurzschlußstromkräfte bedingte Öffnungsbewegung der Kontaktbrücke derart begrenzen, daß die Kontaktfeder dabei nicht auf ihr Blockmaß B zusammengedrückt wird.This object is achieved in that on the fixed contacts stops on the side facing away from the contact bridge Arc chamber are provided by the contact bridge have such a distance A in the OFF state that they are in the Short circuit case when the electromagnetic system is switched on by the short-circuit current forces opening movement of Limit the contact bridge so that the contact spring is not compressed to their block dimension B.

Eine weiterhin vorteilhafte Ausgestaltung besteht, wenn folgende Bedingung erfüllt ist: C - (D + Ö + A) > B A further advantageous embodiment exists if the following condition is met: C - (D + Ö + A)> B

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen:

FIG 1
ein Kontaktsystem eines elektromagnetischen Schaltgeräts im AUS-Zustand,
FIG 2
das Kontaktsystem gemäß FIG 1 im EIN-Zustand und
FIG 3
das Kontaktsystem gemäß FIG 2 im EIN-Zustand bei Auftritt eines Kurzschlußstromes.
An embodiment of the invention is explained below with reference to a drawing. Show it:
FIG. 1
a contact system of an electromagnetic switching device in the OFF state,
FIG 2
the contact system of FIG 1 in the ON state and
FIG 3
the contact system according to FIG 2 in the ON state when a short-circuit current occurs.

In FIG 1 ist ein Kontaktsystem eines elektromagnetischen Schaltgeräts dargestellt. Es ist in einer hier nicht näher dargestellten Lichtbogenkammer mit Löschblechen 1 untergebracht und im wesentlichen aus Festkontakten 2, beweglichen Kontakten 3 an einer Kontaktbrücke 4, einem Kontaktträger 5 mit einem Fenster 6 und einer Kontaktfeder 7 zusammengesetzt. Im vorliegenden AUS-Zustand des Elektromagnetsystems drückt die Kontaktfeder 7 die Kontaktbrücke 4 auf den unteren Rand des Fensters 6 und hat dabei ein Einbaumaß der Länge C. Die beweglichen Kontakte 3 sind im Abstand Ö von den Festkontakten 2 gelegen. Auf der den Festkontakten 2 abgewandten Seite der Kontaktbrücke 4 sind im Abstand A zu dieser Anschläge 8 vorgesehen, die mit der Lichtbogenkammer vorteilhafterweise fest verbunden, z.B. an dieser angeformt sind.1 shows a contact system of an electromagnetic Switchgear shown. It's not closer in one here Arc chamber shown with quenching plates 1 housed and essentially from fixed contacts 2, movable Contacts 3 on a contact bridge 4, a contact carrier 5 with a window 6 and a contact spring 7 assembled. In the present OFF state of the electromagnetic system presses the contact spring 7, the contact bridge 4 on the lower edge of the window 6 and has an installation dimension of length C. Die movable contacts 3 are at a distance Ö from the fixed contacts 2 located. On the side facing away from the fixed contacts 2 the contact bridge 4 are at a distance A from this stop 8 provided with the arcing chamber advantageously firmly connected, e.g. are molded onto this.

FIG 2 zeigt das Kontaktsystem im EIN-Zustand. Der Kontaktträger 5 ist durch den hier nicht dargestellten Magnetanker um den Weg D + Ö gegenüber dem EIN-Zustand nach unten bewegt, wobei mit D der Durchdruck der Kontaktfeder 7 im EIN-Zustand bezeichnet ist. Die Kontaktbrücke 4 hat in dieser Position den Abstand A + Ö von den Anschlägen 8.2 shows the contact system in the ON state. The contact carrier 5 is around by the magnet armature, not shown here moves the path D + Ö downwards from the ON state, with D the pressure of the contact spring 7 in the ON state is designated. The contact bridge 4 has in this position the distance A + Ö from the stops 8.

In FIG 3 ist die Stellung des Kontaktsystems dargestellt, wenn im EIN-Zustand ein Kurzschluß auftritt und damit verbundene Kurzschlußstromkräfte auf die Kontaktbrücke 4 wirksam werden. Die Kontaktbrücke 4 bewegt sich aufgrund der Kurzschlußstromkraft unter Öffnung der Kontakte 2,3 bis zum Aufsetzen an den Anschlägen 8 nach oben. Aufgrund dessen wird auf die Kontaktfeder 7 ein zusätzlicher Durchdruck wirksam, so daß die Feder auf die Länge E = C - (D + Ö + A) zusammengedrückt wird. Würde aufgrund der Stromkrafte die Kontaktfeder 7 auf das Blockmaß B zusammengedrückt werden, bevor die Kontaktbrücke 4 an den Anschlägen 8 festgehalten wird, blieben die Anschläge 8 wirkungslos, denn die Kontaktbrücke 4 würde den Kontaktträger 5 mit nach oben reißen. Um demzufolge mit den Anschlägen 8 die gewünschte Wirkung zu erzielen, muß folgende Bedingung eingehalten werden: C - (D + Ö + A) < B 3 shows the position of the contact system when a short circuit occurs in the ON state and associated short-circuit current forces act on the contact bridge 4. The contact bridge 4 moves due to the short-circuit current force with the opening of the contacts 2, 3 until they touch the stops 8 upwards. Because of this, an additional pressure is effective on the contact spring 7, so that the spring is compressed to the length E = C - (D + Ö + A). If, due to the current forces, the contact spring 7 were compressed to the block dimension B before the contact bridge 4 is held on the stops 8, the stops 8 would have no effect, since the contact bridge 4 would tear the contact carrier 5 upward. In order to achieve the desired effect with the stops 8, the following condition must be met: C - (D + Ö + A) <B

Erst bei Einhaltung dieser Voraussetzung wird verhindert, daß Kurzschlußstromkräfte auf den Kontaktträger 5 zerstörerisch einwirken.Only if this requirement is met is it prevented that Short circuit current forces on the contact carrier 5 destructive act.

Obwohl die vorliegende Erfindung unter Bezugnahme auf die in der beigefügten Zeichnung dargestellte Ausführungsform erläutert ist, sollte berücksichtigt werden, daß damit nicht beabsichtigt ist, die Erfindung nur auf die dargestellte Ausführungsform zu beschränken, sondern alle möglichen Änderungen, Modifizierungen und äquivalente Anordnungen, soweit sie vom Inhalt der Patentansprüche gedeckt sind, einzuschließen.Although the present invention with reference to the in of the accompanying drawing illustrated embodiment is, it should be borne in mind that this is not intended is, the invention only to the illustrated embodiment to limit, but all possible changes, Modifications and equivalent arrangements insofar as they are from Contents of the claims are covered.

Claims (2)

  1. Electrical switching device having an electromagnet system, having an arcing chamber, having stationary contacts (2), having a contact link (4) with moving contacts (3), having a contact mounting (5) with a window (6) in which the contact link (4) is held via a contact spring (7) with the installed dimension (C), the stationary contacts (2) being at a distance (Ö) from the moving contacts (3) when the electromagnet system is in the OFF state, and the contact spring (7) carrying out a penetration movement (D) when the electromagnet system is in the ON state, so that the contact mounting (4) travels through the distance D + Ö between the ON state and the OFF state, and vice versa, characterized in that stops (8) are provided on the side of the arcing chamber facing away from the stationary contacts (2) of the contact link (4), which stops (8) are at such a distance (A) from the contact link (4) in the OFF state that, in the event of a short-circuit and with the electromagnet system switched on, they limit the opening movement of the contact links (4) caused by the short-circuit current forces, such that the contact spring (7) is in this case not compressed to its fully compressed size (B).
  2. Electrical switching device according to Claim 1, characterized in that the following condition is satisfied: C - (D + Ö + A) < B.
EP97901046A 1996-01-22 1997-01-16 Electrical switching device Expired - Lifetime EP0876675B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97901046A EP0876675B1 (en) 1996-01-22 1997-01-16 Electrical switching device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19602118 1996-01-22
DE19602118A DE19602118C2 (en) 1996-01-22 1996-01-22 Electrical switching device
EP96112126 1996-07-26
EP96112126 1996-07-26
PCT/EP1997/000182 WO1997027605A1 (en) 1996-01-22 1997-01-16 Electrical switching device
EP97901046A EP0876675B1 (en) 1996-01-22 1997-01-16 Electrical switching device

Publications (2)

Publication Number Publication Date
EP0876675A1 EP0876675A1 (en) 1998-11-11
EP0876675B1 true EP0876675B1 (en) 1999-07-28

Family

ID=26022235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97901046A Expired - Lifetime EP0876675B1 (en) 1996-01-22 1997-01-16 Electrical switching device

Country Status (5)

Country Link
US (1) US6054911A (en)
EP (1) EP0876675B1 (en)
CN (1) CN1068452C (en)
DE (1) DE59700289D1 (en)
WO (1) WO1997027605A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4395023B2 (en) * 2003-11-04 2010-01-06 三菱電機株式会社 Circuit breaker
US7839642B2 (en) 2008-04-04 2010-11-23 Liebert Corporation Heat-sink brace for fault-force support
CN101789332B (en) * 2010-02-10 2012-10-31 湖北盛佳电器设备有限公司 Alternating current contactor with mechanical short circuit self-locking function
FR2974660B1 (en) * 2011-04-27 2018-05-25 Legrand France ELECTRIC CONTACT DEVICE WITH HIGH PERFORMANCE CUT
CN103177884B (en) * 2011-12-26 2016-09-14 上海电科电器科技有限公司 The structure of contact terminal of low-voltage electrical apparatus
JP6064223B2 (en) * 2012-12-28 2017-01-25 パナソニックＩｐマネジメント株式会社 Contact device and electromagnetic relay equipped with the contact device
US10109444B2 (en) * 2013-12-17 2018-10-23 Siemens Aktiengesellschaft Electronic module for protecting a HVDC converter from current surges of energy discharges from a capacitor of the converter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112275A (en) * 1973-03-26 1978-09-05 Siemens Aktiengesellschaft Contact structure for electrical switching apparatus
US4195212A (en) * 1977-06-06 1980-03-25 Eaton Corporation Contactor having higher fault current withstandability
US4132968A (en) * 1977-09-06 1979-01-02 Westinghouse Electric Corp. Current limiting circuit breaker with improved magnetic drive device
FR2454174A1 (en) * 1979-04-09 1980-11-07 Merlin Gerin CONTACTOR WITH FAST OPENING FAULT CONTROL
SE424242B (en) * 1980-10-30 1982-07-05 Asea Ab ELECTROMAGNETIC MANOVATED ELECTRICAL SWITCH
US4378542A (en) * 1981-10-30 1983-03-29 Amf Inc. Electromagnetic contactor
DE3824546A1 (en) * 1988-07-20 1990-01-25 Asea Brown Boveri ELECTRIC CIRCUIT BREAKER
JP2812810B2 (en) * 1990-02-14 1998-10-22 三菱電機株式会社 Switch

Also Published As

Publication number Publication date
DE59700289D1 (en) 1999-09-02
US6054911A (en) 2000-04-25
CN1068452C (en) 2001-07-11
EP0876675A1 (en) 1998-11-11
CN1205111A (en) 1999-01-13
WO1997027605A1 (en) 1997-07-31

Similar Documents

Publication Publication Date Title
EP0976138B1 (en) Electromagnetic switching device
DE4337344A1 (en) Current limiting contact system for circuit breakers
EP0876675B1 (en) Electrical switching device
DE102012223168A1 (en) Electromechanical switching device, has arc-quenching device comprising first permanent magnet and second permanent magnet that are arranged on both sides of switching contact, where magnets are magnetized in opposite directions
EP0219449B1 (en) Contact arrangement for a low-voltage circuit breaker with a flexible current conductor
EP0350825B1 (en) Electrical switch gear
DE2846213C2 (en)
EP1032942B1 (en) Switching device with an electric arc extinguishing device
DE2833497C2 (en) Electrical load switch for low-voltage systems
DE3150210C2 (en) Electrical snap switch
WO2002027739A1 (en) Switching contact arrangement for a low-voltage power switch with contact force springs
EP1423862B1 (en) Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts
EP1042772A1 (en) Arc extinguisher for switchgear
EP1040493B1 (en) Multiple break contact device for electrical switchgear
EP0824262B1 (en) Snap action switch with casing
DE69834157T2 (en) Electric control device
WO1998009307A1 (en) Mobile switching contact arrangement with contact force springs
DE2653001B2 (en) Electrical disconnector with rapid disconnection and forced safety interruption
EP0168568B1 (en) Isolating switch, in particular a pantograph isolating switch
DE19629482C1 (en) Low-voltage (LV) circuit breaker switch contact design
EP0736887B1 (en) Electrical contact assembly
DE10346361B3 (en) Terminal rail device for electrical LV switch, has at least one terminal rail provided with localized reduction in its cross-section for compression of current lines
DE8211786U1 (en) Electrical snap switch
DE19948695B4 (en) Low-voltage circuit breaker with a movable contact carrier with end-position retaining spring
DE3103356A1 (en) Interrupter switch having an arc auxiliary contact

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980720

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19981207

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19990728

REF Corresponds to:

Ref document number: 59700289

Country of ref document: DE

Date of ref document: 19990902

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090320

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090120

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100803