WO1990015428A1 - Systeme de contacts pour sectionneurs a levier - Google Patents

Systeme de contacts pour sectionneurs a levier Download PDF

Info

Publication number
WO1990015428A1
WO1990015428A1 PCT/DE1990/000247 DE9000247W WO9015428A1 WO 1990015428 A1 WO1990015428 A1 WO 1990015428A1 DE 9000247 W DE9000247 W DE 9000247W WO 9015428 A1 WO9015428 A1 WO 9015428A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
movable contact
lever
extensions
contact system
Prior art date
Application number
PCT/DE1990/000247
Other languages
German (de)
English (en)
Inventor
Helmut Beier
Harry Friebe
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1990015428A1 publication Critical patent/WO1990015428A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
    • H01H2031/286—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact wherein the contact is rotatable around its own longitudinal axis
    • 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

Definitions

  • the invention relates to a contact system for lever circuit breakers, with a movable contact piece and with paired fixed current contacts that receive it between itself and with a fixed pre-contact device assigned to the movable contact piece, which has a pair of contact fingers protruding in the opening direction. which take up the movable contact piece between them when switching on before the permanent current contacts are closed.
  • a lever circuit breaker is known from US Pat. No. 3,030,481, the contact system of which has a continuous current contact and a preliminary contact.
  • the disconnecting knife of the switch is equipped with a continuous current contact piece, which is pivoted in the course of the switch-on movement in the manner of a lever and at the same time rotated about the axis of the disconnecting knife.
  • a pre-contact piece of the isolating knife touches the stationary part of the pre-contact.
  • the known lever circuit breaker is thus able to switch currents in the kA range at voltages of a few 100 V even as a busbar circuit breaker without the contact surfaces carrying the continuous current being unduly stressed.
  • the object of the invention is to provide a contact system for lever circuit breakers of the type mentioned at the outset, the design of which is simplified and in which the number of components is reduced.
  • the contact system according to the invention is designed such that the extensions are provided with a burn-off-resistant material, at least on the facing contact surfaces.
  • B. Tungsten copper are provided.
  • the movable contact piece is advantageously provided with contact bodies, the contact surfaces of which can be formed as part of a cylindrical surface. These contact surfaces can also advantageously be provided with a material which is resistant to erosion.
  • FIG. 1 schematically shows a side view of a contact system for a lever circuit breaker, in which the parts which are not necessary for understanding the invention are not shown for the sake of simplicity.
  • the lever circuit breaker has a movable disconnecting knife 1 which is articulated on a support insulator 2 in a pivot bearing 3.
  • the separating knife 1 can thus be pivoted in the direction of the arrow 4, that is to say can be transferred into the switch-off position.
  • the movable contact piece 5 of the separating knife 1 is in engagement with permanent current contacts 6 which are arranged in a stationary manner on a further support insulator 7 and which face each other in pairs and accommodate the movable contact piece 5 between them.
  • One of the contact finger pairs 6 protrudes in the opening direction 4, so that the contact fingers 6a receive the movable contact piece 5 between them when switched on in the opposite direction of the arrow 4 before the other permanent current contacts 6 are closed.
  • the pair of contact fingers 6a of extensions 6b protruding in the opening direction 4 is one of the permanent current contact pairs 6 formed.
  • the extensions 6b can be coated with a burn-off-resistant material, e.g. B. tungsten copper, silver-cadmium oxide or the like.
  • a burn-off-resistant material e.g. B. tungsten copper, silver-cadmium oxide or the like.
  • the movable contact piece 5 is provided with contact bodies 5a, the contact surfaces 5b of which are formed as part of a cylindrical surface.
  • the contact surfaces 5b are preferably also provided with a material which is resistant to erosion.
  • the contact system according to the invention is suitable for all lever circuit breakers, in particular those which rotate the disconnecting knife 1 and its contact piece 5 during or after the pivoting movement.
  • Lever isolators equipped with the contact system according to the invention are used as busbar isolators in high-voltage open-air systems, for. B. suitable for 420 kV, which must master currents of the order of a few 1000 A at voltages of a few 100 V without burning phenomena at the continuous current contact points when the bus bars are switched without interruption.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

Un système de contacts pour sectionneurs à levier, comportant un contact mobile (5) et des contacts permanents (6) fixes, disposés par paires et entourant le contact mobile, ainsi qu'un système de contact auxiliaire pour le contact mobile, ce système auxiliaire étant fixe et dépendant du contact mobile, présente une paire de doigts de contact faisant saillie dans le sens de l'ouverture. Ces doigts enserrent le contact mobile lors de la mise en circuit avant la fermeture des contacts permanents. Pour diminuer le nombre des éléments, la paire de doigts de contact (6a) en saillie dans le sens de l'ouverture est formée de prolongements (6b) de l'une des paires de contacts permanents (6).
PCT/DE1990/000247 1989-06-07 1990-03-23 Systeme de contacts pour sectionneurs a levier WO1990015428A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8907091U DE8907091U1 (de) 1989-06-07 1989-06-07 Kontaktvorrichtung für Hebeltrennschalter
DEG8907091.7U 1989-06-07

Publications (1)

Publication Number Publication Date
WO1990015428A1 true WO1990015428A1 (fr) 1990-12-13

Family

ID=6839957

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000247 WO1990015428A1 (fr) 1989-06-07 1990-03-23 Systeme de contacts pour sectionneurs a levier

Country Status (2)

Country Link
DE (1) DE8907091U1 (fr)
WO (1) WO1990015428A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009032540A1 (de) * 2009-07-10 2011-01-13 Areva Energietechnik Gmbh Erdungsschalter insbesondere für eine Mittelspannungsschaltanlage
CN107785206A (zh) * 2017-11-10 2018-03-09 河南森源电气股份有限公司 一种接地开关及其触头组件和触头

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447253A (en) * 1935-12-31 1936-05-14 Vernon Hope Improvements in contacts for the blades of electric switches, fuses and the like
DE1123735B (de) * 1960-05-19 1962-02-15 Bbc Brown Boveri & Cie Elektrische Kontaktanordnung
DE1126477B (de) * 1958-10-04 1962-03-29 Sachsenwerk Licht & Kraft Ag Kontaktanordnung fuer elektrische Leistungsschalter mit Schaltmesser
US3154656A (en) * 1957-12-23 1964-10-27 S & C Electric Co Circuit interrupter provided with main and auxiliary contacts in parallel sequentially operable to open the circuit first at the main contacts followed by the auxiliary contacts
US3530264A (en) * 1969-05-09 1970-09-22 Ite Imperial Corp Vertical reach disconnect switch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447253A (en) * 1935-12-31 1936-05-14 Vernon Hope Improvements in contacts for the blades of electric switches, fuses and the like
US3154656A (en) * 1957-12-23 1964-10-27 S & C Electric Co Circuit interrupter provided with main and auxiliary contacts in parallel sequentially operable to open the circuit first at the main contacts followed by the auxiliary contacts
DE1126477B (de) * 1958-10-04 1962-03-29 Sachsenwerk Licht & Kraft Ag Kontaktanordnung fuer elektrische Leistungsschalter mit Schaltmesser
DE1123735B (de) * 1960-05-19 1962-02-15 Bbc Brown Boveri & Cie Elektrische Kontaktanordnung
US3530264A (en) * 1969-05-09 1970-09-22 Ite Imperial Corp Vertical reach disconnect switch

Also Published As

Publication number Publication date
DE8907091U1 (de) 1989-09-14

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