EP0325747B1 - Device for mechanic connection of the switch blades of a medium voltage switch with a switch drive - Google Patents

Device for mechanic connection of the switch blades of a medium voltage switch with a switch drive Download PDF

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Publication number
EP0325747B1
EP0325747B1 EP88120546A EP88120546A EP0325747B1 EP 0325747 B1 EP0325747 B1 EP 0325747B1 EP 88120546 A EP88120546 A EP 88120546A EP 88120546 A EP88120546 A EP 88120546A EP 0325747 B1 EP0325747 B1 EP 0325747B1
Authority
EP
European Patent Office
Prior art keywords
switch
lever
shaft
accordance
medium voltage
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
EP88120546A
Other languages
German (de)
French (fr)
Other versions
EP0325747A2 (en
EP0325747A3 (en
Inventor
Josef Perle
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.)
GEC ALSTHOM T & D GMBH
Original Assignee
GEC Alsthom T&D GmbH Germany
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 GEC Alsthom T&D GmbH Germany filed Critical GEC Alsthom T&D GmbH Germany
Publication of EP0325747A2 publication Critical patent/EP0325747A2/en
Publication of EP0325747A3 publication Critical patent/EP0325747A3/en
Application granted granted Critical
Publication of EP0325747B1 publication Critical patent/EP0325747B1/en
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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • 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

Definitions

  • the invention relates to a device for mechanically connecting the switching knives of a medium-voltage switch assigned to the individual poles according to the preamble of claim 1.
  • the switch drive acts either directly on the frame-side shaft via a lever or on a pivot lever connected to this frame-side shaft, but in both cases it is necessary for the individual pivot levers to be firmly connected to the common shaft in order to ensure a perfect operation and to ensure that the switching blades can be pivoted securely.
  • a polyphase interruption switching device is known from US-A-4 126 773, in which each individual pivot lever is firmly connected to the common polygonal shaft.
  • the polygonal shaft is rotatably supported in bearings which are attached to a holding frame which carries the entire device.
  • a rotation of the polygonal shaft and thus the switching process itself is effected via an actuating lever which is firmly connected to the polygonal shaft and an actuating rod which are connected to one another via articulated connections.
  • the object of the invention is both to eliminate the previously given dependence of the mode of operation on the friction conditions and to achieve an additional cost-saving simplification.
  • the jamming between the pivoting levers and the polygonal tube takes place via the stirrup spanning the polygonal tube. Since the bracket and thus also the swivel levers connected to them can be adjusted in the axial direction of the polygonal tube, any required pole offset can be easily compensated for.
  • a switch pole is attached to a pole frame 5 by means of support insulators, the switch blade 8 of which can be reversed between the closed position and the open position via a thrust insulator 7 and a swivel lever 3 via a switch drive (not shown).
  • the pivot lever 3 connected to the thrust isolator 7 via a joint 10 is mounted on a simple bolt 4 in the pole frame 5.
  • Each pivot lever 3 of a multi-pole switch is clamped by means of a bracket 2 with a square shaft 1, and with this square shaft 1 an actuating lever 6 is connected, which extends approximately parallel to the pivot lever 3 and extends in the opposite direction on the switch blade side.
  • connection point 9 is provided for the switch drive.
  • the arrangement is preferably designed such that the pole frame 5 also serves as a stop for the square shaft 1 when the switch is opened.
  • pivot lever 3 and thrust isolator 7 are in a dead center position when the switch is open, so that the switch blades 8 cannot close the switch due to their own weight if the switch is mounted in a position pivoted 90 ° counterclockwise with respect to the illustration in the drawing.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Processing Of Terminals (AREA)
  • Dry Shavers And Clippers (AREA)
  • Feeding And Guiding Record Carriers (AREA)

Abstract

A device for the mechanical connection of the switch blades, allocated to the individual poles, of a medium voltage switch to a switch drive is described, in which the drive is connected via an operating lever and a quadrilateral shaft which is locked to pivoting levers. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur mechanischen Verbindung der den einzelnen Polen zugeordneten Schaltmesser eines Mittelspannungsschalters nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for mechanically connecting the switching knives of a medium-voltage switch assigned to the individual poles according to the preamble of claim 1.

Bei bekannten Vorrichtungen dieser Art wirkt der Schalterantrieb entweder über einen Hebel unmittelbar auf die rahmenseitige Welle oder auf einen mit dieser rahmenseitigen Welle verbundenen Schwenkhebel, aber in beiden Fällen ist es erforderlich, daß die einzelnen Schwenkhebel fest mit der gemeinsamen Welle verbunden sind, um ein einwandfreies und sicheres Verschwenken der Schaltmesser zu gewährleisten.In known devices of this type, the switch drive acts either directly on the frame-side shaft via a lever or on a pivot lever connected to this frame-side shaft, but in both cases it is necessary for the individual pivot levers to be firmly connected to the common shaft in order to ensure a perfect operation and to ensure that the switching blades can be pivoted securely.

So ist aus der US-A-4 126 773 eine Polyphasen-Unterbrechungsschaltvorrichtung bekannt, bei der jeder einzelne Schwenkhebel fest mit der gemeinsamen Mehrkantwelle verbunden ist. Die Mehrkantwelle ist dabei in Lagern drehbar gelagert, die an einem die gesamte Vorrichtung tragenden Halterahmen angebracht sind. Eine Drehung der Mehrkantwelle und damit der Schaltvorgang selbst wird über einen fest mit der Mehrkantwelle verbundenen Betätigungshebel und einer Betätigungsstange bewirkt, die über gelenkige Verbindungen miteinander verbunden sind.A polyphase interruption switching device is known from US-A-4 126 773, in which each individual pivot lever is firmly connected to the common polygonal shaft. The polygonal shaft is rotatably supported in bearings which are attached to a holding frame which carries the entire device. A rotation of the polygonal shaft and thus the switching process itself is effected via an actuating lever which is firmly connected to the polygonal shaft and an actuating rod which are connected to one another via articulated connections.

Aufgabe der Erfindung ist es, sowohl die bisher gegebene Abhängigkeit der Funktionsweise von den Reibungsverhältnissen zu beseitigen als auch eine zusätzlich kostensparende Vereinfachung zu erzielen.The object of the invention is both to eliminate the previously given dependence of the mode of operation on the friction conditions and to achieve an additional cost-saving simplification.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1.This object is achieved by the characterizing features of claim 1.

Durch diese vorteilhafte Ausgestaltung der Erfindung ist eine Lagerung der gemeinsamen Mehrkantwelle nicht weiter notwendig. Dadurch wird der Aufbau der Vorrichtung nicht nur insgesamt einfacher, sondern durch die Ermöglichung des Einsatzes kleiner rostfreier Bolzen, die nur einer vernachlässigbaren Vereisungsgefahr unterliegen, sicherer.Due to this advantageous embodiment of the invention, it is no longer necessary to mount the common polygonal shaft. This not only simplifies the construction of the device overall, but also makes it safer by enabling the use of small, rustproof bolts which are subject to only a negligible risk of icing.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung erfolgt die Verklemmung zwischen den Schwenkhebeln und dem Mehrkantrohr über das Mehrkantrohr übergreifende Bügel. Da die Bügel und damit auch die mit ihnen verbundenen Schwenkhebel in Axialrichtung des Mehrkantrohres verstellbar ist, läßt sich ein evtl. erforderlicher Polversatz leicht ausgleichen.According to a further advantageous embodiment of the invention, the jamming between the pivoting levers and the polygonal tube takes place via the stirrup spanning the polygonal tube. Since the bracket and thus also the swivel levers connected to them can be adjusted in the axial direction of the polygonal tube, any required pole offset can be easily compensated for.

Weitere vorteilhafte Merkmale der Erfindung sind in Unteransprüchen angegeben.Further advantageous features of the invention are specified in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird unter Bezugnahme auf die Zeichnung erläutert; die einzige Figur der Zeichnung zeigt eine schematische Seitenansicht eines Pols eines Mittelspannungsschalters, der mit einer Vorrichtung gemäß der Erfindung ausgestattet ist.An embodiment of the invention will be explained with reference to the drawing; the single figure of the drawing shows a schematic side view of a pole of a medium voltage switch, which is equipped with a device according to the invention.

An einem Polrahmen 5 ist mittels Stützisolatoren ein Schalterpol befestigt, dessen Schaltmesser 8 über einen Schubisolator 7 und einen Schwenkhebel 3 über einen nicht dargestellten Schalterantrieb zwischen der geschlossenen Stellung und der offenen Stellung umsteuerbar ist.A switch pole is attached to a pole frame 5 by means of support insulators, the switch blade 8 of which can be reversed between the closed position and the open position via a thrust insulator 7 and a swivel lever 3 via a switch drive (not shown).

Der mit dem Schubisolator 7 über ein Gelenk 10 verbundene Schwenkhebel 3 ist auf einem einfachen Bolzen 4 im Polrahmen 5 gelagert.The pivot lever 3 connected to the thrust isolator 7 via a joint 10 is mounted on a simple bolt 4 in the pole frame 5.

Jeder Schwenkhebel 3 eines mehrpoligen Schalters ist mittels eines Bügels 2 mit einer Vierkantwelle 1 verklemmt, und mit dieser Vierkantwelle 1 ist ein Betätigungshebel 6 verbunden, der etwa parallel zum Schwenkhebel 3 verläuft und sich in entgegengesetzter Richtung schaltmesserseitig erstreckt.Each pivot lever 3 of a multi-pole switch is clamped by means of a bracket 2 with a square shaft 1, and with this square shaft 1 an actuating lever 6 is connected, which extends approximately parallel to the pivot lever 3 and extends in the opposite direction on the switch blade side.

Im Bereich des freien Endes dieses Betätigungshebels 6 ist eine Anschlußstelle 9 für den Schalterantrieb vorgesehen.In the area of the free end of this operating lever 6, a connection point 9 is provided for the switch drive.

Aufgrund der Verklemmung der Schwenkhebel 3 mit einer Mehrkant- insbesondere Vierkantwelle und der Ansteuerung dieser Vierkantwelle über einen Betätigungshebel werden Abhängigkeiten von Klemmreibungen, wie sie in bekannten Ausführungen auftreten, sicher vermieden. Außerdem ist es von Vorteil, daß anstelle einer durchgehenden Lagerwelle für die verschiedenen Schwenkhebel 3 einzelne einfache Bolzen 4 verwendet werden können.Due to the jamming of the pivot lever 3 with a polygonal, in particular square shaft and the control of this square shaft via an actuating lever, dependencies on clamping friction, as they occur in known designs, are reliably avoided. It is also advantageous that 3 single simple bolts 4 can be used instead of a continuous bearing shaft for the various pivot levers.

Vorzugsweise wird die Anordnung so ausgebildet, daß der Polrahmen 5 beim öffnen des Schalters gleichzeitig als Anschlag für die Vierkantwelle 1 dient.The arrangement is preferably designed such that the pole frame 5 also serves as a stop for the square shaft 1 when the switch is opened.

Außerdem wird die Dimensionierung von Schwenkhebel 3 und Schubisolator 7 bevorzugt so gewählt, daß sich Schubisolator 7 und Schwenkhebel 3 im geöffneten Zustand des Schalters in einer Totpunktlage befinden, so daß die Schaltmesser 8 durch ihr Eigengewicht den Schalter nicht schließen können, wenn der Schalter in einer bezüglich der Darstellung in der Zeichnung um 90° im Gegenuhrzeigersinn verschwenkten Lage montiert ist.In addition, the dimensioning of pivot lever 3 and thrust isolator 7 is preferably chosen so that thrust isolator 7 and pivot lever 3 are in a dead center position when the switch is open, so that the switch blades 8 cannot close the switch due to their own weight if the switch is mounted in a position pivoted 90 ° counterclockwise with respect to the illustration in the drawing.

Claims (6)

  1. Apparatus for the mechanical connection of the switch blades (8) of a medium voltage switch, in particular of a medium voltage free air switch, which are associated with the individual poles, to a switch drive, wherein a thrust insulator (7) and a pivot lever (3) hingedly connected to the thrust insulator (7) is associated with each switch blade (8), wherein the polygonal shaft (1) is clampingly connected to the pivot levers (3) of the respective switch, which are disposed spaced apart alongside one another, and wherein an actuating lever (6) is connected to the polygonal shaft (1) with a connection location (9) for the switch drive being provided at the free end of the actuation lever, characterised in that each pivotal lever (3) is journalled on a bolt (4) mounted in the pole frame (5).
  2. Apparatus in accordance with claim 1, characterised in that the actuating lever (6) extends approximately parallel to and oppositely directed to the pivotal lever (3).
  3. Apparatus in accordance with one of the preceding claims, characterised in that the polygonal shaft (1) is a square shaft.
  4. Apparatus in accordance with one of the preceding claims, characterised in that the square shaft is formed as a hollow shaft.
  5. Apparatus in accordance with one or more of the preceding claims, characterised in that the polygonal shaft (1) is connected to the respective pivot lever (3) via a clamping hoop (2).
  6. Apparatus in accordance with one or more of the preceding claims, characterised in that the pole frame (5) forms an abutment for the polygonal shaft (1) when the switch blade (8) is open.
EP88120546A 1988-01-27 1988-12-08 Device for mechanic connection of the switch blades of a medium voltage switch with a switch drive Expired - Lifetime EP0325747B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802370 1988-01-27
DE3802370A DE3802370A1 (en) 1988-01-27 1988-01-27 DEVICE FOR MECHANICALLY CONNECTING THE SWITCHING KNIVES OF A MEDIUM VOLTAGE SWITCH TO A SWITCH DRIVE

Publications (3)

Publication Number Publication Date
EP0325747A2 EP0325747A2 (en) 1989-08-02
EP0325747A3 EP0325747A3 (en) 1990-10-10
EP0325747B1 true EP0325747B1 (en) 1995-03-15

Family

ID=6346097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120546A Expired - Lifetime EP0325747B1 (en) 1988-01-27 1988-12-08 Device for mechanic connection of the switch blades of a medium voltage switch with a switch drive

Country Status (5)

Country Link
EP (1) EP0325747B1 (en)
AT (1) ATE120029T1 (en)
DE (2) DE3802370A1 (en)
ES (1) ES2068822T3 (en)
PT (1) PT89544A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100447925C (en) * 2006-04-28 2008-12-31 周友东 Switch-on and switch-off device for outdoor high-voltage isolation switch
CN103065856A (en) * 2012-12-19 2013-04-24 川铁电气（天津）集团有限公司 27.5KV indoor integration electric isolating switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1540599A1 (en) * 1965-12-01 1970-01-02 Siemens Ag Swing wedge drive for motor-driven disconnectors
DE2510382A1 (en) * 1975-03-10 1976-09-23 Bbc Brown Boveri & Cie Contact assembly for earthing switch - has fixed contact inset into insulator and uses angled moving contact
NL158314B (en) * 1975-07-24 1978-10-16 Hazemeijer Bv ELECTRIC SWITCH.
US4126773A (en) * 1977-03-09 1978-11-21 S&C Electric Company Polyphase disconnecting switch arrangement
DE7907916U1 (en) * 1979-03-21 1979-07-19 Concordia Sprecher-Schaltgeraete Gmbh, 7024 Filderstadt Device for setting the relative position of switch blades and contacts of electrical switches
FR2494491A1 (en) * 1980-11-17 1982-05-21 Merlin Gerin Circuit breaker for armoured electrical installation - is externally controlled by rotary rod in which rotation is converted into linear movement within divider

Also Published As

Publication number Publication date
DE3853355D1 (en) 1995-04-20
PT89544A (en) 1989-10-04
ES2068822T3 (en) 1995-05-01
EP0325747A2 (en) 1989-08-02
DE3802370A1 (en) 1989-08-10
EP0325747A3 (en) 1990-10-10
ATE120029T1 (en) 1995-04-15

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