EP1291886B1 - Current limiting circuit breaker with multiple contact arms - Google Patents

Current limiting circuit breaker with multiple contact arms Download PDF

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Publication number
EP1291886B1
EP1291886B1 EP02019397A EP02019397A EP1291886B1 EP 1291886 B1 EP1291886 B1 EP 1291886B1 EP 02019397 A EP02019397 A EP 02019397A EP 02019397 A EP02019397 A EP 02019397A EP 1291886 B1 EP1291886 B1 EP 1291886B1
Authority
EP
European Patent Office
Prior art keywords
contact
fingers
arc
circuit breaker
contact fingers
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 - Fee Related
Application number
EP02019397A
Other languages
German (de)
French (fr)
Other versions
EP1291886A1 (en
Inventor
Franz Böder
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 Industries GmbH
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 EP1291886A1 publication Critical patent/EP1291886A1/en
Application granted granted Critical
Publication of EP1291886B1 publication Critical patent/EP1291886B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates to a current-limiting multi-finger contact system according to the The preamble of claim 1 as disclosed in document DE 12 57 933 B and is applicable to low-voltage circuit breakers, especially circuit breakers.
  • the invention is therefore based on the object, a safe distribution of arcs to reach.

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  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft ein strombegrenzendes Mehrfingerkontaktsystem nach dem Oberbegriff von Anspruch 1, wie es im Dokument DE 12 57 933 B offenbart wird und findet Anwendung bei Niederspannungsschutzschaltern, insbesondere Leistungsschaltern.The invention relates to a current-limiting multi-finger contact system according to the The preamble of claim 1 as disclosed in document DE 12 57 933 B and is applicable to low-voltage circuit breakers, especially circuit breakers.

Aus der Druckschrift DE-A1-4337344 ist ein für mehrpolige Leistungsschalter geeignetes strombegrenzendes Kontaktsystem bekannt, das aus mehreren Kontaktfingern mit einem beweglichen Kontaktstück, einem feststehenden Kontakt mit mindestens einem feststehenden Kontaktstück und einer Lichtbogenlöschkammer besteht. Die Kontaktfinger sind auf einer Schwenkachse gelagert, von Kontaktdruckfedem beaufschlagt und stehen mit jeweils einem Kipppunktsystem in Verbindung, das nach einer elektrodynamischen Öffnungsbewegung unter Kurzschlussbedingungen wenigstens eines Kontaktfingers diesen in einer stabilen Offenstellung belässt. Von Nachteil bei derartigen Kontaktsystemen ist, dass sich der Kurzschlussstrom und der beim Öffnen entstehende Lichtbogen häufig sehr einseitig auf einen der Kontaktfinger konzentriert.From the document DE-A1-4337344 is suitable for multi-pole circuit breaker current-limiting contact system known, consisting of several contact fingers with a movable contact piece, a fixed contact with at least a fixed contact piece and an arc extinguishing chamber. The Contact fingers are mounted on a pivot axis, acted upon by Kontaktdruckfedem and are each associated with a tipping point system, which after a electrodynamic opening movement under short circuit conditions at least a contact finger leaves this in a stable open position. At a disadvantage Such contact systems is that the short-circuit current and the opening Arcing often concentrated very one-sided on one of the contact fingers.

Der Erfindung liegt daher die Aufgabe zugrunde, eine sichere Verteilung von Lichtbögen zu erreichen.The invention is therefore based on the object, a safe distribution of arcs to reach.

Ausgehend von einem strombegrenzenden Mehrfingerkontaktsystem der eingangs genannten Art wird die Aufgabe erfindungsgemäß durch die Merkmale des unabhängigen Anspruches gelöst, während den abhängigen Ansprüchen vorteilhafte Weiterbildungen der Erfindung zu entnehmen sind.Starting from a current-limiting multi-finger contact system of the beginning mentioned type, the object is achieved by the features of the independent Claim solved during the dependent claims advantageous developments can be found in the invention.

Durch die weitgehend räumlich isolierte Aufteilung der Kontaktfinger auf mehrere Lichtbogenlöschkammern wird eine gesicherte Aufteilung des Kurzschlussstromes auf mehrere Lichtbögen erreicht, wodurch die Belastung der einzelnen Kontakte spürbar gesenkt und eine schnellere Kühlung der Lichtbögen erreicht wird.Due to the largely spatially isolated division of the contact fingers on several Arc quenching chambers is a secure division of the short-circuit current achieved on multiple arcs, reducing the load on the individual contacts noticeably lowered and a faster cooling of the arcs is achieved.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren erläuterten Ausführungsbeispiel. Es zeigen

Figur 1:
in perspektivischer Darstellung ein Zweifingerkontaktsystem ohne Lichtbogenlöschkammem;
Figur 2:
das Kontaktsystem gemäß Fig. 1 in Draufsicht.
Das strombegrenzende Zweifingerkontaktsystem 2 gehört zu einem Pol eines von einem Gehäuse umgebenen und nicht weiter dargestellten Niederspannungsschutzschalters. Das Kontaktsystem 2 enthält zwei parallel angeordnete Kontaktfinger 4 mit jeweils einem beweglichen Kontaktstück 6. Die beweglichen Kontaktstücke 6 sind mittels eines an sich bekannten Betätigungsmechanismus mit einem feststehenden Kontaktstück 8 eines feststehenden Kontaktes 10 in und außer Verbindung zu bringen. Die Kontaktfinger 4 lagern auf einer gemeinsamen Schwenkachse 12 und werden im eingeschalteten Zustand durch jeweils eine Kontaktdruckfeder 14 beaufschlagt. Jedem Paar von Kontaktstücken 6, 8 ist eine Lichtbogenlöschkammer 16 mit mehreren Lichtbogenlöschblechen zugeordnet. Die Lichtbogenlöschkammern 16 mit dem jeweils zugeordneten Kontaktfinger 4 sind weitgehend voneinander isoliert. Dazu sind als Bestandteile des Gehäuses Zwischenwände 18 und 19 vorgesehen, die in einem Teilbereich miteinander verschachtelt sind. An den Seitenwänden 20 der Poleinheit sind außerdem Stege 22 angeformt. Die Zwischenwände 18, 19 und die Stege 22 führen zu einer erheblichen Verengung und Verlängerung der Luftspalte 24 und 25, die seitlich neben den Kontaktfingern 4 verlaufen. Die so ausgebildeten Luftspalte 24 und 25 stellen ein wirksamen Hindernis für die Vereinigung von Lichtbögen dar, die sich infolge eines Kurzschlussstromes zwischen beiden Kontaktstückpaaren 6 und 8 herausbilden.Further details and advantages of the invention will become apparent from the following, explained with reference to figures embodiment. Show it
FIG. 1:
in perspective view a two-finger contact system without Lichtbogenlöschkammem;
FIG. 2:
the contact system of FIG. 1 in plan view.
The current-limiting two-finger contact system 2 belongs to a pole of a housing surrounded and not shown low-voltage circuit breaker. The contact system 2 includes two parallel contact fingers 4, each with a movable contact piece 6. The movable contact pieces 6 are by means of a known per se actuating mechanism with a fixed contact piece 8 of a fixed contact 10 in and out of connection. The contact fingers 4 bear on a common pivot axis 12 and are acted upon in the on state by a respective contact pressure spring 14. Each pair of contact pieces 6, 8 is associated with an arc quenching chamber 16 having a plurality of arc quenching plates. The arc extinguishing chambers 16 with the respective associated contact fingers 4 are largely isolated from each other. For this purpose, partitions 18 and 19 are provided as components of the housing, which are nested together in a partial area. On the side walls 20 of the pole unit webs 22 are also formed. The intermediate walls 18, 19 and the webs 22 lead to a considerable narrowing and lengthening of the air gaps 24 and 25 which run laterally next to the contact fingers 4. The thus formed air gaps 24 and 25 are an effective obstacle to the union of arcs that emerge as a result of a short-circuit current between two contact piece pairs 6 and 8.

Claims (3)

  1. Current-limiting multi-finger contact system for each pole which is to be connected of a circuit breaker having a housing, comprising
    two or more contact fingers (4) each having a moveable contact piece (6) and
    at least two separate arc-quenching chambers (16),
    the contact fingers (4) bearing on a pivot axis (12) and each being subjected to a contact spring (14) compression,
    the contact fingers (4) being evenly distributed over the arc-quenching chambers (16), and
    the arc-quenching chambers (16) having the respectively associated contact fingers (4) largely being isolated from one another by insulating partition walls (18, 19),
    characterized in that
    a single, fixed contact (10) having at least one fixed contact piece (8) is provided, and
    webs (22) are integrally formed on side walls (20), which laterally delimit the multi-finger contact system (2), in the direction of contact fingers (4).
  2. Multi-finger contact system according to the preceding claim, characterized in that the partition walls (18, 19) are parts of the housing.
  3. Multi-finger contact system according to one of the preceding claims, characterized in that two contact fingers (4) and two arc-quenching chambers (16) are provided.
EP02019397A 2001-09-11 2002-08-30 Current limiting circuit breaker with multiple contact arms Expired - Fee Related EP1291886B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20114952U 2001-09-11
DE20114952U DE20114952U1 (en) 2001-09-11 2001-09-11 Current-limiting multi-finger contact system

Publications (2)

Publication Number Publication Date
EP1291886A1 EP1291886A1 (en) 2003-03-12
EP1291886B1 true EP1291886B1 (en) 2005-06-08

Family

ID=7961545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02019397A Expired - Fee Related EP1291886B1 (en) 2001-09-11 2002-08-30 Current limiting circuit breaker with multiple contact arms

Country Status (2)

Country Link
EP (1) EP1291886B1 (en)
DE (2) DE20114952U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109449027B (en) * 2018-12-05 2024-02-09 河南华盛隆源电气有限公司 Built-in isolated circuit breaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1257933B (en) * 1964-03-20 1968-01-04 Bbc Brown Boveri & Cie Electric circuit breaker
IT1151197B (en) * 1982-05-21 1986-12-17 Cge Comp Gen Elettromecc CURRENT LIMIT SWITCH WITH A PERFECT CONTACT SYSTEM

Also Published As

Publication number Publication date
DE50203320D1 (en) 2005-07-14
DE20114952U1 (en) 2003-01-30
EP1291886A1 (en) 2003-03-12

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