EP0325767B1 - Niederspannungs-Leistungsschalter mit auswechselbaren Kontakten - Google Patents

Niederspannungs-Leistungsschalter mit auswechselbaren Kontakten Download PDF

Info

Publication number
EP0325767B1
EP0325767B1 EP88121213A EP88121213A EP0325767B1 EP 0325767 B1 EP0325767 B1 EP 0325767B1 EP 88121213 A EP88121213 A EP 88121213A EP 88121213 A EP88121213 A EP 88121213A EP 0325767 B1 EP0325767 B1 EP 0325767B1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit breaker
low
carrier part
main
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
EP88121213A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0325767A3 (en
EP0325767A2 (de
Inventor
Eduard Petrus
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0325767A2 publication Critical patent/EP0325767A2/de
Publication of EP0325767A3 publication Critical patent/EP0325767A3/de
Application granted granted Critical
Publication of EP0325767B1 publication Critical patent/EP0325767B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H2001/001—Contacts providing easy replacement of contacts

Definitions

  • the invention relates to low-voltage circuit breakers with interchangeable contacts according to the preamble of claim 1.
  • a switch is known from US-A-3 004 125, in which the flexible band is fixed on the shift lever by means of a U-shaped leaf spring.
  • EP-A-0 225 207 also discloses a switch in which the exchange of the main contacts of the movable arm is also not so easy. The axis is threaded through the lamella contacts and bearing plates in the axial direction. For this handling, however, a lateral clearance of approximately one bolt length on the shift lever is required.
  • the invention has for its object to provide low-voltage circuit breakers with on-site replaceable main contacts and flex bands.
  • the invention relates to the exchange of the main contacts of the movable contact arm.
  • the fixed main contacts can be easily released according to the known prior art.
  • the invention offers the advantage that the articulated arm can be designed in such a way that when the contact system closes, the auxiliary contacts lead and lag when opened. Furthermore, the part of the contact arm which carries the main and auxiliary contacts can advantageously be designed such that electrodynamically acting forces increase the contact pressure and that lamellar main contacts can be accommodated.
  • Fig. 1 shows a contact system of a low-voltage circuit breaker with a movable contact arm, which is designed as a two-part articulated arm with a contact carrier part 1, a main arm 2 and a releasable joint 3, 4, 13 connecting the contact carrier part 1 and the main arm 2
  • Contact carrier part 1 a main contact and an auxiliary contact 5, 6 are attached, to which corresponding stationary contacts 11, 12 are assigned on the fixed part 8 of the contact system.
  • the movable contact arm is pivotally attached with its main arm 2 via a bearing pin 7 to the fixed part of the contact system and the electrical connection between the fixed lower connecting lug and the contact carrier part 1 is made with a flexible band 9.
  • the releasable joint 3, 4, 13 between the contact carrier part 1 and main arm 2 consists of a hinge pin 3, which is fixed to the contact carrier part 1, a slot hole 4 open on one side in the main arm 2 and a pin holder 13, which is designed as a U-shaped leaf spring and, when the joint is assembled, the hinge pin 3 in the slot hole open on one side 4 holds and is easily removable.
  • a contact pressure spring 10 With a contact pressure spring 10, the required contact pressure on the main contacts 5, 11 is generated when the contact system is closed (see also FIG. 5).
  • the contact pressure spring 10 is held on the contact carrier part 1 and on the main arm 2 by spring receptacles 21, 22, respectively.
  • the effect of the contact pressure spring 10 is limited by a stop 23 which is located on the main arm 2.
  • the contact carrier part 1 shows an extension 24 below the main contact 5 with which the current flow is influenced so that the electrodynamically acting forces increase the contact pressure on the main contacts 5, 11.
  • the contact carrier part 1 and the main arm 2 are U-shaped in cross section.
  • the flexible band 9 can be detached from the fixed part of the contact system 8 via the flexible band fastening 15, which is easily accessible from above, and can be removed together with the contact carrier part 1 from the contact system.
  • Fig. 2 shows the disassembled movable contact arm with the contact arm support 1, the main arm 2 of the contact pressure spring 10, the pin holder 13 a flattened stop pin 16.
  • the contact support part 1 carries the fixed hinge pin 3, which is held in the slot hole 4 open on one side.
  • the pin holder 13, which is designed as a U-shaped leaf spring, lies with its back 17 after it has been placed on the flattened stop pin 16 which is mounted in recesses 20 of the main arm 2 with respect to the oblong hole receptacle 4 which is open on one side.
  • bearing hole 4, sheet 13 - the side legs 18 of the u-shaped leaf spring can be bent slightly apart and thus release the hinge pin 3.
  • the movable main contact 5 initially rolls on the fixed contact 11 until the auxiliary contacts 6 and 12 touch each other.
  • the main contacts 5, 11 only open after the auxiliary contacts 6, 12 have touched.
  • the movable auxiliary contact 6 then lifts from the fixed auxiliary contact 12.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP88121213A 1988-01-26 1988-12-19 Niederspannungs-Leistungsschalter mit auswechselbaren Kontakten Expired - Lifetime EP0325767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802183A DE3802183A1 (de) 1988-01-26 1988-01-26 Niederspannungs-leistungsschalter mit auswechselbaren kontakten
DE3802183 1988-01-26

Publications (3)

Publication Number Publication Date
EP0325767A2 EP0325767A2 (de) 1989-08-02
EP0325767A3 EP0325767A3 (en) 1990-10-17
EP0325767B1 true EP0325767B1 (de) 1994-04-27

Family

ID=6345986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121213A Expired - Lifetime EP0325767B1 (de) 1988-01-26 1988-12-19 Niederspannungs-Leistungsschalter mit auswechselbaren Kontakten

Country Status (2)

Country Link
EP (1) EP0325767B1 (enrdf_load_stackoverflow)
DE (2) DE3802183A1 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19932010C1 (de) * 1999-07-02 2001-03-08 Siemens Ag Schaltkontaktanordnung eines Niederspannungs-Leistungschalters mit Hauptkontakten, Zwischenkontakten und Abreißkontakten
DE19957259A1 (de) * 1999-11-19 2001-06-13 Siemens Ag Schaltkontaktanordnung mit einer feststehenden Baugruppe aus Vorkontakt und Lichtbogenhorn
DE19727696B4 (de) * 1997-06-20 2007-09-13 Siemens Ag Bewegbarer Schaltkontakt für Niederspannungs-Leistungsschalter
US8198561B2 (en) 2009-01-30 2012-06-12 Siemens Aktiengesellschaft Switching mechanism for a switching device having a switching lever which remains in an intermediate switch position when a contact element is welded and when an opening operation is carried out

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260027A (en) * 1991-09-30 1993-03-31 Long & Crawford Limited Electrical switchgear
DE19635366A1 (de) 1996-08-21 1998-02-26 Siemens Ag Bewegbare Kontaktanordnung für einen Niederspannungs-Leistungsschalter mit einem Schwenklager
DE10012605A1 (de) * 2000-03-09 2001-09-13 Siemens Ag Schaltpol für Niederspannungs-Schaltgeräte mit linear bewegbarem Kontaktträger

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH116447A (de) * 1925-09-16 1926-09-01 Oerlikon Maschf Doppelkontaktvorrichtung für elektrische Schaltapparate.
US2025697A (en) * 1933-04-22 1935-12-24 Westinghouse Electric & Mfg Co Circuit interrupter
US2209038A (en) * 1938-06-06 1940-07-23 Clark Controller Co Electric contact
GB648081A (en) * 1948-11-18 1950-12-28 Donovan Electrical Company Ltd Improvements connected with electric switches
DE966808C (de) * 1950-08-04 1957-09-12 Voigt & Haeffner Ag Bewegtes Schaltstueck mit Lichtbogenleitblech fuer Selbstschalter, Schuetze od. dgl.
US3004125A (en) * 1959-06-18 1961-10-10 Licentia Gmbh Switch
US3134878A (en) * 1962-07-19 1964-05-26 Gen Electric Movable contact arm assembly
DE3432086A1 (de) * 1984-08-28 1986-03-06 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung mit einer die kontaktkraft vergroessernden stromabhaengigen kraft
DE3679291D1 (de) * 1985-10-31 1991-06-20 Merlin Gerin Kinematische uebertragungskette zwischen dem steuermechanismus und den polen eines elektrischen lastschalters mit einem gespritzten isoliergehaeuse.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727696B4 (de) * 1997-06-20 2007-09-13 Siemens Ag Bewegbarer Schaltkontakt für Niederspannungs-Leistungsschalter
DE19932010C1 (de) * 1999-07-02 2001-03-08 Siemens Ag Schaltkontaktanordnung eines Niederspannungs-Leistungschalters mit Hauptkontakten, Zwischenkontakten und Abreißkontakten
DE19957259A1 (de) * 1999-11-19 2001-06-13 Siemens Ag Schaltkontaktanordnung mit einer feststehenden Baugruppe aus Vorkontakt und Lichtbogenhorn
DE19957259C2 (de) * 1999-11-19 2001-11-29 Siemens Ag Schaltkontaktanordnung mit einer feststehenden Baugruppe aus Vorkontakt und Lichtbogenhorn
US8198561B2 (en) 2009-01-30 2012-06-12 Siemens Aktiengesellschaft Switching mechanism for a switching device having a switching lever which remains in an intermediate switch position when a contact element is welded and when an opening operation is carried out

Also Published As

Publication number Publication date
EP0325767A3 (en) 1990-10-17
DE3802183C2 (enrdf_load_stackoverflow) 1991-05-23
DE3889318D1 (de) 1994-06-01
EP0325767A2 (de) 1989-08-02
DE3802183A1 (de) 1989-08-03

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