EP0066533B1 - Sectionneur pour installations à haute tension - Google Patents

Sectionneur pour installations à haute tension Download PDF

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Publication number
EP0066533B1
EP0066533B1 EP82730051A EP82730051A EP0066533B1 EP 0066533 B1 EP0066533 B1 EP 0066533B1 EP 82730051 A EP82730051 A EP 82730051A EP 82730051 A EP82730051 A EP 82730051A EP 0066533 B1 EP0066533 B1 EP 0066533B1
Authority
EP
European Patent Office
Prior art keywords
switching
contact
tear
latch
switching element
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
Application number
EP82730051A
Other languages
German (de)
English (en)
Other versions
EP0066533A2 (fr
EP0066533A3 (en
Inventor
Werner Ing. Grad. Gruner
Sreenivasan Sampath Kumar
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 EP0066533A2 publication Critical patent/EP0066533A2/fr
Publication of EP0066533A3 publication Critical patent/EP0066533A3/de
Application granted granted Critical
Publication of EP0066533B1 publication Critical patent/EP0066533B1/fr
Expired 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main 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
    • H01H31/32—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 rectilinearly-movable contact

Definitions

  • the invention relates to a circuit breaker for high-voltage switchgear with a metallic, grounded and filled with insulating medium high dielectric strength housing with hollow switching elements surrounded by field electrodes, one of which contains a spring-loaded tear-off switching pin with an end-side recess into which a switching element located in the other, connected to it Mating contact engages in the switched-on position, the tear-off switching pin remaining at the start of the switching-off movement of one contact piece relative to the latter, in contact with the other contact piece, and is returned by the spring after the release at a greater speed than the movement of the contact piece.
  • Such a circuit breaker is known from US-A-3 348 001.
  • the tear-off switching pin is arranged in a bore in the movable contact and is mounted in an isolated manner in the front attachment of the movable contact.
  • the end of the tear-off switch pin facing the isolating section, which protrudes beyond the movable contact piece, has an end hook-shaped projection which forms a recess into which a resilient locking member designed as a contact finger engages when the switch is in the position and which lies inside the contact finger of the fixed contact piece and with it is electrically connected.
  • the tear-off switch pin carries a spring which lies between a washer attached to its end and the front extension of the contact piece.
  • the tear-off switching pin is held back by the locking member and the spring is tensioned until its spring force is sufficient to overcome the spring force of the locking member.
  • the tear-off switch pin detaches from the locking member and is pulled back into the contact piece by the spring at a higher speed than the movement of the contact piece until the disk comes to rest against the bottom of the bore.
  • the movable contact piece with the tear-off switching pin protruding beyond are located inside the field electrode surrounding it.
  • the release of the tear-off switching pin when the movable switching element is switched off depends solely on the force of the spring and on the spring force of the locking member. Therefore, the time of release or the position of the movable contact piece cannot be precisely predetermined at this time, because manufacturing tolerances can influence the spring constant of both the spring and the locking member. Since, moreover, the tear-off switching pin also projects beyond the movable contact piece in its rest position, its tip provided with the recess causes a distortion of the field as long as it is not inside the field electrode. Therefore, the path of the movable contact piece must be chosen to be relatively large, namely so large that the tip of the tear-off switching pin is also returned to the field electrode.
  • the present invention is intended to improve such a metal-encapsulated pressure-gas-insulated disconnector. For economic reasons, these are generally provided with a relatively slow drive for the contact pieces. For this reason, they should not be switched under load, because if an arc occurs due to the slow switch-off movement, there is a risk that the arc will migrate, especially at higher nominal voltages, to the grounded metal encapsulation and thus form an earth fault.
  • the invention has for its object to provide a metal-encapsulated, pressurized gas-insulated disconnector with slowly moving contact pieces, in which arcs of low current can occur without damage. Such arcs occur e.g. B. when switching off unloaded transformers.
  • a circuit breaker of the type described above is designed according to the invention so that a pawl rotatably mounted in the other contact piece engages in the recess of the tear-off switch pin, which, mechanically controlled, releases the tear-off switch pin at a certain position of the movable contact piece its rest position is inside the hollow contact piece.
  • the pawl releases the tear-off switching pin at a predetermined position of the movable contact when it has formed a sufficiently large isolating distance.
  • the spring guides the tear-off switching pin back into the interior of the hollow contact piece at a higher speed than the movement of the slowly driven movable contact piece. If a switch-off arc arises due to the presence of a low load, this is quickly interrupted due to the high speed with which the tear-off switching pin and the pawl are pulled apart and no longer has the opportunity to migrate to the grounded encapsulation.
  • the tear-off switch pin Since the tear-off switch pin is in the idle state, ie in the switched-off position, inside the movable hollow contact piece, which in turn lies inside the field electrode, just like the pawl with the other contact piece lies inside the other field electrode, the electrical field in the isolating path is through the From zipper switch and the pawl has not changed. It is particularly advantageous to provide an adjustable and lockable stop inside the field electrode for the mechanical control of the pawl, which moves the pawl to release the tear-off switching pin. This allows you to freely select the position at which the movable contact piece should be when the pawl releases the tear-off switching pin.
  • the shape of the pawl can expediently be chosen as an angle lever which is movable about a pivot point. A better mechanical engagement on the tear-off switch pin is achieved if the pawl is designed like pliers.
  • FIGS. 1 to 6 show a longitudinal section through a circuit breaker, shown schematically. 1 to 4 show one and the same disconnector in different positions, i. H. 1 shows the switch-off position, FIG. 2 shows the switch-on position and FIGS. 3 and 4 show differently selected positions for the release of the tear-off switching pin.
  • FIGS. 5 and 6 each show exemplary embodiments with different designs.
  • the isolating switch 1 is located in a tubular, metallic, grounded housing 2, which is closed at the end faces by conical bushing insulators 3, which support the tubular conductor 4 arranged in the center.
  • the housing 2 is filled with SF 6 under pressure.
  • both the movable contact piece 5 and the standing contact piece 6 are surrounded by shielding field electrodes 7.
  • the drive 8 for the movable contact piece 5 is also arranged in the interior of the field electrode 7.
  • a tear-off switching pin 9 which is provided at the end with a recess 10 formed by turning it to a smaller diameter.
  • the tear-off switch pin 9 is held in its rest position by a spring 11. In this he is completely surrounded by the movable contact piece 5 and does not protrude from it.
  • a cylinder 12 in which a piston 13 slides is provided in the interior of the opposite field electrode 7 with the standing contact piece 6.
  • This piston 13 carries, rotatably arranged with the bearing 14, the bracket 15 consisting of an angle lever, which ends in a hook 16.
  • the pawl 15 is also held in its rest position by a spring 17 in such a way that, in the switched-off position, it does not protrude beyond the standing switching piece 6.
  • a return spring 18 is provided between the piston 13 and the pawl 15, which pulls the pawl 15 back into the rest position after rotation.
  • the short lever extension 19 adjacent to the bearing 14 projects through a slot in the cylinder 12. In its possible stroke path there is an adjustable and lockable stop 20 which triggers a rotary movement of the pawl 15 via the lever shoulder 19.
  • Fig. 1 shows the switch-off position of the disconnector 1, in which the tear-off switch pin 9 with the movable contact piece 5 and also the pawl 15 are in the rest position.
  • the switch-on position of the disconnector 1 is shown in FIG. 2.
  • the movable contact 5 is in engagement with the stationary contact 6.
  • the pawl 15 is still in the end position, but it protrudes into the hollow movable contact 5 and engages with its hook 16 in the recess 10 of the tear-off switch pin 9. so that in addition to the main current path from the conductor 4 via the movable contact piece 5, the standing contact piece 6, the field electrode 7 to the conductor 4, an auxiliary current path via the tear-off switching pin 9 and the pawl 15 is created.
  • the slowly switching drive 8 first moves the hollow movable contact piece 5 back so far that its connection to the standing contact piece 6 is interrupted and a sufficiently large isolating distance is created while the tear-off switching pin 9 engages remains with the pawl 15 so that any current that may be present now flows solely via the auxiliary current path.
  • the opening movement tightens the spring 11, which loads the tear-off switch pin 9, as does the spring 17 of the pawl 15, since the pawl 15 is carried along by the tear-off switch pin 9 until its lever shoulder 19 abuts the stop 20. This causes a rotation of the pawl 15, whereby the hook 16 comes out of the recess 10 in the tear-off switch pin 9 and releases it.
  • the time of release of the tear-off switching pin 9 by the pawl 15 can be determined very precisely by setting the stop 20. In the position of the stop 20 shown in FIG. 3, the pawl 15 is still within the field electrode 7 at the moment of release. In contrast, the pawl 15 is already in the free position in the position of the stop 20 shown in FIG. 4 from the tear-off switching pin 9 Disconnected distance and only there is the tear-off switch pin 9 free.
  • the return spring 18 guides the pawl 15 back into the rest position after its rotation.
  • Fig. 5 shows a slightly modified embodiment of the circuit breaker 1, the same reference numerals are kept for the same parts.
  • the tear-off switch pin 9 is arranged with its spring 11 in the cylinder 12 in the field electrode 7 of the standing contact piece 6.
  • the pawl 15, however, is together with the back Holfeder 18 fixed inside the movable contact piece 5, but rotatable via the bearing 14, arranged.
  • the angle projection 19 protrudes through a slot in the hollow movable contact piece 5, so that it can run against a stop 20 within the field electrode 7 during the switching-off movement and can thus trigger the rotary movement to release the tear-off switching pin 9.
  • each gun arm 21, 22 runs out to a lever shoulder 23, 24, each of which runs against a stop 20 when the release of the tear-off switch pin 9 is to be triggered.

Landscapes

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

Claims (5)

1. Sectionneur (1) pour des installations à haute tension, avec un boîtier (2) métallique, mis à la terre et rempli avec un milieu isolant à haute rigidité diélectrique, avec des pièces de contact (5, 6) entourées par des électrodes de champ (7) et dont une première pièce de contact comporte une cheville de contact à arrachement (9) chargée par un ressort et pourvue d'un dégagement (10) situé du côté de l'extrémité et dans lequel s'enclenche, dans la position de fermeture du sectionneur, un contact antagoniste se situant dans la seconde pièce de contact et relié à cette dernière, la réalisation étant telle que la cheville de contact à arrachement (9) est, au début du mouvement de coupure de la première pièce de contact par rapport à cette dernière, en contact avec la seconde pièce de contact et est ramenée après libération, par le ressort (11), avec une vitesse supérieure à celle du mouvement de la pièce de contact mobile (5), caractérisé par le fait que dans le dégagement de la cheville de contact à arrachement (9) pénètre un cliquet articulé dans l'autre pièce de contact (5, 6), et qui, avec commande mécanique, libère pour une position déterminée de la pièce de contact mobile (5), la cheville de contact à arrachement (9) qui, dans sa position de repos se situe à l'intérieur de la pièce de contact creuse (5, 6).
2. Sectionneur selon la revendication 1, caractérisé par le fait que le cliquet (15) est disposé sur un piston (13) qui coulisse dans un cylindre (12) agencé à l'intérieur de l'électrode de champ (7) et qu'il est refoulé par un ressort (17) dans la position d'extrémité dans laquelle le cliquet (15) se situe à l'intérieur de l'électrode champ (7).
3. Sectionneur selon la revendication 1 ou 2, caractérisé par le fait qu'une butée (20) qui est réglable et qui peut être fixée en position, déplace le cliquet (15), à l'intérieur de l'électrode de champ (7), pour libérer la cheville de contact à arrachement (9).
4. Sectionneur selon la revendication 1 ou 3, caractérisé par le fait que le cliquet (15) est constitué par un levier coudé qui est mobile autour d'un point d'articulation (14).
5. Sectionneur selon la revendication 1 ou 3, caractérisé par le fait que le cliquet (15) est réalisé à la manière d'une pince.
EP82730051A 1981-06-02 1982-05-04 Sectionneur pour installations à haute tension Expired EP0066533B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813122442 DE3122442A1 (de) 1981-06-02 1981-06-02 Trennschalter fuer hochspannungsanlagen
DE3122442 1981-06-21

Publications (3)

Publication Number Publication Date
EP0066533A2 EP0066533A2 (fr) 1982-12-08
EP0066533A3 EP0066533A3 (en) 1984-04-18
EP0066533B1 true EP0066533B1 (fr) 1986-12-03

Family

ID=6134058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730051A Expired EP0066533B1 (fr) 1981-06-02 1982-05-04 Sectionneur pour installations à haute tension

Country Status (5)

Country Link
US (1) US4445014A (fr)
EP (1) EP0066533B1 (fr)
JP (1) JPS57210527A (fr)
DE (2) DE3122442A1 (fr)
SU (1) SU1122239A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938711A1 (de) * 1989-11-17 1991-05-23 Siemens Ag Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547107B1 (fr) * 1983-06-06 1986-05-09 Merlin Gerin Sectionneur d'isolement blinde
DE3329555A1 (de) * 1983-08-15 1985-03-07 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen
DE3331024A1 (de) * 1983-08-27 1985-03-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hochspannungstrennschalter, insbesondere einsaeulen-trennschalter, zum schalten kommutierender stroeme
DE3331819A1 (de) * 1983-09-01 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen
DE9109811U1 (fr) * 1991-08-05 1991-10-02 Siemens Ag, 8000 Muenchen, De
DE4343786C1 (de) * 1993-12-17 1995-02-23 Siemens Ag Hochspannungs-Leistungsschalter mit einer Feldelektrode
EP2728602B1 (fr) * 2012-11-05 2015-01-21 ABB Technology AG Séparateur de charge haute tension électrique et procédé d'ouverture de celui-ci
DE102013205945A1 (de) * 2013-04-04 2014-10-09 Siemens Aktiengesellschaft Trennschalteinrichtung
US10256058B2 (en) * 2015-11-16 2019-04-09 Mitsubishi Electric Corporation Switchgear
HUE052765T2 (hu) * 2016-08-26 2021-05-28 Abb Power Grids Switzerland Ag Kapcsoló és eljárás a kapcsoló megszakítására

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350107A (en) * 1920-08-17 Electric switch
FR874628A (fr) * 1941-04-11 1942-08-13 Delle Atel Const Electr Dispositif de coupure associé à un sectionneur ou à un coupe-circuit sectionneur
FR1261626A (fr) * 1959-07-01 1961-05-19 App Electr Hazemeyer Prise de courant à fermeture et à coupure brusques
US3098915A (en) * 1961-11-16 1963-07-23 S & C Electric Co Circuit interrupter
FR1448854A (fr) * 1965-05-22 1966-08-12 Merlin Gerin Sectionneur à haute tension à coupure sous charge
US3348001A (en) * 1965-07-26 1967-10-17 Westinghouse Electric Corp Electric distribution system
DE1615898C3 (de) * 1967-07-07 1980-06-12 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Hochspannungsschalter, insbesondere Lasttrennschalter
CH524887A (de) * 1970-12-14 1972-06-30 Bbc Brown Boveri & Cie Elektrischer Kompressionsschalter
US4271339A (en) * 1976-06-07 1981-06-02 S&C Electric Company High voltage circuit switch arrangement
JPS5559613A (en) * 1978-10-30 1980-05-06 Tokyo Shibaura Electric Co Gas breaker
US4348561A (en) * 1980-08-05 1982-09-07 A. B. Chance Company Mechanical device for picking up an electrical load

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938711A1 (de) * 1989-11-17 1991-05-23 Siemens Ag Trennschalter fuer metallgekapselte, druckgasisolierte hochspannungsschaltanlagen

Also Published As

Publication number Publication date
JPH0113182B2 (fr) 1989-03-03
EP0066533A2 (fr) 1982-12-08
DE3274595D1 (en) 1987-01-15
JPS57210527A (en) 1982-12-24
US4445014A (en) 1984-04-24
SU1122239A3 (ru) 1984-10-30
EP0066533A3 (en) 1984-04-18
DE3122442A1 (de) 1982-12-23

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