EP0876675B1 - Electrical switching device - Google Patents
Electrical switching device Download PDFInfo
- 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
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:
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.
- 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
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
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:
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
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)
- 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).
- Electrical switching device according to Claim 1, characterized in that the following condition is satisfied: C - (D + Ö + A) < B.
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 |
---|---|---|---|
DE19602118A DE19602118C2 (en) | 1996-01-22 | 1996-01-22 | Electrical switching device |
DE19602118 | 1996-01-22 | ||
EP96112126 | 1996-07-26 | ||
EP96112126 | 1996-07-26 | ||
EP97901046A EP0876675B1 (en) | 1996-01-22 | 1997-01-16 | Electrical switching device |
PCT/EP1997/000182 WO1997027605A1 (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)
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)
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 |
-
1997
- 1997-01-16 WO PCT/EP1997/000182 patent/WO1997027605A1/en active IP Right Grant
- 1997-01-16 EP EP97901046A patent/EP0876675B1/en not_active Expired - Lifetime
- 1997-01-16 US US09/101,909 patent/US6054911A/en not_active Expired - Fee Related
- 1997-01-16 CN CN97191437A patent/CN1068452C/en not_active Expired - Fee Related
- 1997-01-16 DE DE59700289T patent/DE59700289D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59700289D1 (en) | 1999-09-02 |
CN1205111A (en) | 1999-01-13 |
WO1997027605A1 (en) | 1997-07-31 |
US6054911A (en) | 2000-04-25 |
EP0876675A1 (en) | 1998-11-11 |
CN1068452C (en) | 2001-07-11 |
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