EP0674332B1 - Interrupteur électrique de puissance haute tension à entraînement - Google Patents

Interrupteur électrique de puissance haute tension à entraînement Download PDF

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Publication number
EP0674332B1
EP0674332B1 EP95250046A EP95250046A EP0674332B1 EP 0674332 B1 EP0674332 B1 EP 0674332B1 EP 95250046 A EP95250046 A EP 95250046A EP 95250046 A EP95250046 A EP 95250046A EP 0674332 B1 EP0674332 B1 EP 0674332B1
Authority
EP
European Patent Office
Prior art keywords
shift rod
drive
switch rod
rod
movement
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
EP95250046A
Other languages
German (de)
English (en)
Other versions
EP0674332A1 (fr
Inventor
Wolfgang Knuth
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP0674332A1 publication Critical patent/EP0674332A1/fr
Application granted granted Critical
Publication of EP0674332B1 publication Critical patent/EP0674332B1/fr
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • the invention relates to an electrical high-voltage circuit breaker with a drive at ground potential and with at least one insulating switching rod for transmitting the drive movement to a high-voltage potential breaker unit by axial pressure or tension.
  • High-voltage circuit breakers usually have two switching contacts, which are galvanically connected to one another in the switched-on state and are separated when the switch-off movement is carried out. Since the opening movement is to take place at high speed and, at the same time as the mechanical contacts are often to be actuated when the switching contacts are disconnected, a large compression force is required to actuate such a high-voltage circuit breaker.
  • the drive device of a high-voltage circuit breaker is usually arranged at ground potential , while the actual interrupter unit, which contains the switch contacts, is normally at high voltage potential. The driving force must now be transmitted between these two units by means of an insulating medium, usually a shift rod.
  • the present invention has for its object to monitor the state of the switching rod in an electrical high-voltage circuit breaker of the type mentioned in order to ensure the safe functioning of the circuit breaker guarantee and arrange for maintenance if the shift rod is defective.
  • a first device is provided on the first end of the shift rod facing the interrupter unit, which generates an axial movement of the first end of the shift rod a rotational movement of this end about the longitudinal axis of the shift rod and that on the second facing the drive
  • a second device for monitoring the rotary movement of the shift rod is provided at the end of the shift rod.
  • the shift rod is actuated, be it in the pulling or pushing direction, then, if it is not defective, the first end is rotated a little by the first device.
  • a torque is exerted on the shift rod so that, depending on the counter torque exerted on it, it also rotates a bit at its second end.
  • This rotation of the second end of the shift rod indicates firstly that the pulling or pushing movement of the shift rod has continued from the drive to its first end and secondly that the rotational movement of the first end of the shift rod has been transmitted back to the second end of the shift rod .
  • the second device can be arranged in the area of the drive at ground potential.
  • a particularly advantageous embodiment of the invention provides that the first device is designed as a link guide.
  • either a link can be fixed to the switch housing and the first end of the switch rod can carry a bolt guided in the link.
  • the backdrop would then have to lead helically around the shift rod.
  • the link is connected to the first end of the switch rod and a corresponding bolt is fastened to the encapsulation of the circuit breaker.
  • an external thread with a large pitch is provided at the first end of the shift rod and that the first device has a corresponding internal thread.
  • a signal emitted by the second device regarding the position of the switch rod is compared with the desired state of the circuit breaker and that a signal is emitted if these values differ from one another.
  • the figure shows schematically an interrupter unit and a drive of a high-voltage circuit breaker.
  • the circuit breaker is driven by a hydraulic drive unit 1 with a drive rod 2.
  • An induction element 3 is provided on the drive rod 2 and emits a signal to a proximity switch 4 when the drive rod 2 moves.
  • the proximity switch 4 is connected to a measuring electronics 5, which strikes the movement of the drive rod 2 by the response of the proximity switch 4 and forms a signal about the target switching state of the crusher unit.
  • the movement of the drive rod 2 is converted into a corresponding pushing or pulling movement of the shift rod 7 via a stationary crank 6.
  • the crank 6 is connected to the shift rod 7 via an articulated rod 22.
  • the pushing or pushing movement of the switching rod 7 is transmitted to the interrupter unit 8, whereby the contact between the lines 9, 10 is switched on and off, respectively.
  • the interrupter unit 8 as well as the switch rod 7 and possibly also the joint rod 22 are enclosed gas-tight by an encapsulation 11 which contains an insulating gas, for example SF 6 .
  • the crank 6 can also be arranged within this encapsulation 11.
  • the shift rod 7 is axially guided in several places, which is indicated, for example, by the axial guide 12.
  • the shift rod 7 is divided into three parts 13, 14, 15, which are mutually rotatable about the longitudinal axis of the shift rod 7.
  • roller bearings 16, 17 are provided between the parts, which allow such rotation with little resistance and at the same time are able to transmit a tensile or compressive force.
  • a bolt 18 is fastened, which projects radially outward from the shift rod 7 and engages in a slot 19 of a sheet which is firmly connected to the encapsulation 11.
  • the slot 19 is formed helically surrounding the shift rod 7 coaxially.
  • a swivel arm 20 is fastened with an induction element, which carries out a corresponding swivel movement when the shift rod 7 rotates. This is registered by an inductive probe 21 which is connected to the measuring electronics 5.
  • the first device 18, 19 is arranged as close as possible to the interrupter unit 8, so that when the Switching movement between the location of the link guide 18, 19 and the interrupter unit 8 are as few sources of error as possible.
  • the measuring electronics 5 can then compare the signals received from the probe 4 and the probe 21 with one another and determine whether the desired state of the interrupter unit 8 (switching state of the drive unit) corresponds to the actual state. If this is not the case, the switch is shut down and must be maintained.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (4)

  1. Interrupteur électrique de puissance à haute tension, comportant un dispositif d'entraînement se trouvant au potentiel de terre et comportant au moins une perche (7) isolante pour la transmission d'un déplacement d'entraînement à une unité (8) d'interrupteur se trouvant à un potentiel à haute tension par poussée ou traction axiale, caractérisé en ce qu'il est prévu, à la première extrémité tournée vers l'unité (8) d'interruption de la perche (7) isolante, un premier dispositif (18, 19), qui produit, lors d'un déplacement axial de la première extrémité de la perche (7) isolante, une rotation de cette extrémité par rapport à l'axe longitudinal de la perche (7) isolante et en ce que, a la seconde extrémité de la perche (7) isolante tournée vers le dispositif d'entraînement, il est prévu un second dispositif (20, 21) destiné à surveiller la rotation de la perche (7) isolante.
  2. Interrupteur de puissance à haute tension suivant la revendication 1, caractérisé en ce que le premier dispositif (18, 19) a la forme d'un guidage par coulisse.
  3. Interrupteur de puissance à haute tension suivant la revendication 1, caractérisé en ce qu'il est prévu, à la première extrémité de la perche (7) isolante, un filetage à grand pas et en ce que le premier dispositif comporte un taraudage correspondant.
  4. Interrupteur de puissance à haute tension suivant l'une des revendications 1 à 3, caractérisé en ce qu'un signal issu du second dispositif (20, 21) correspondant à la position de la perche (7) isolante est comparé à l'état de consigne de l'interrupteur de puissance et en ce qu'un signal est envoyé dans le cas d'un écart de ces valeurs l'une par rapport à l'autre.
EP95250046A 1994-03-25 1995-02-24 Interrupteur électrique de puissance haute tension à entraînement Expired - Lifetime EP0674332B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4411323A DE4411323C1 (de) 1994-03-25 1994-03-25 Elektrischer Hochspannungs-Leistungsschalter mit einem Antrieb
DE4411323 1994-03-25

Publications (2)

Publication Number Publication Date
EP0674332A1 EP0674332A1 (fr) 1995-09-27
EP0674332B1 true EP0674332B1 (fr) 1997-09-17

Family

ID=6514405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250046A Expired - Lifetime EP0674332B1 (fr) 1994-03-25 1995-02-24 Interrupteur électrique de puissance haute tension à entraînement

Country Status (2)

Country Link
EP (1) EP0674332B1 (fr)
DE (2) DE4411323C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519721C1 (de) * 1995-05-30 1996-10-24 Aeg Energietechnik Gmbh Leistungsschalter und Verfahren zur Überwachung des Schalterantriebs
DE19604203A1 (de) * 1996-02-06 1997-08-07 Abb Patent Gmbh Verfahren zur Überwachung eines Mittel- oder Hochspannungsleistungsschalters
DE29612646U1 (de) * 1996-07-10 1996-09-19 Siemens AG, 80333 München Umlenkgetriebe für einen elektrischen Hochspannungsschalter
DE29706203U1 (de) * 1997-03-27 1997-06-05 Siemens AG, 80333 München Hochspannungs-Leistungsschalter mit einer Einrichtung zur Schaltstellungserfassung
DE19901121A1 (de) * 1999-01-14 2000-07-20 Abb Patent Gmbh Antriebsankopplung an ein Schaltgerät

Also Published As

Publication number Publication date
DE4411323C1 (de) 1995-04-20
DE59500659D1 (de) 1997-10-23
EP0674332A1 (fr) 1995-09-27

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