EP0123941B1 - Appareil interrupteur pour des installations à haute tension - Google Patents

Appareil interrupteur pour des installations à haute tension Download PDF

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Publication number
EP0123941B1
EP0123941B1 EP84103609A EP84103609A EP0123941B1 EP 0123941 B1 EP0123941 B1 EP 0123941B1 EP 84103609 A EP84103609 A EP 84103609A EP 84103609 A EP84103609 A EP 84103609A EP 0123941 B1 EP0123941 B1 EP 0123941B1
Authority
EP
European Patent Office
Prior art keywords
contact
pushing
area
fixed contact
capturing unit
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
EP84103609A
Other languages
German (de)
English (en)
Other versions
EP0123941A1 (fr
Inventor
Heinz Szygulla
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.)
Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
Original Assignee
Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
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 Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co filed Critical Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co
Priority to AT84103609T priority Critical patent/ATE24793T1/de
Publication of EP0123941A1 publication Critical patent/EP0123941A1/fr
Application granted granted Critical
Publication of EP0123941B1 publication Critical patent/EP0123941B1/fr
Expired legal-status Critical Current

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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
    • H01H31/023—Base and stationary contacts mounted thereon

Definitions

  • the invention relates to a switching device for high-voltage switchgear, in particular earthing switches, with a fixed contact connected to a busbar and a switching contact which can be adjusted in a swivel plane by means of an actuating arm and can be pushed onto the fixed contact, the fixed contact having a sliding area and the switching contact having at least one pair of contact fingers, which in the closed state of the switching device rest on the fixed contact in the slide-on area on both sides and protrude in the longitudinal direction of the actuating arm beyond the slide-on area of the fixed contact.
  • the fixed contact has a slide-on area provided with a slide-on stop and an attachment arm running approximately transversely to the slide-on direction. Slide-on area and the fastening arm together form an arcuate component lying in the swivel plane; when the switchgear is closed, the contact fingers rest on the fixed contact in the slide-on area and on the slide-on stop on both sides.
  • the geometric design in the event of a short circuit means that the contact pressure of the contact fingers at the sliding stop is increased and taken up by the fixed contact.
  • the slide stop In the event of a short circuit, the slide stop also becomes a current path for the short-circuit current, with a very high specific contact pressure being achieved via the contact areas designed as point contacts.
  • the loop-shaped design of the component formed by the push-on area and the fastening arm deliberately generates so-called corner forces, which lead to an increase in the contact pressure at the push-on stop in the event of a short circuit, or the corner forces acting externally against the push-on direction, such as those between the actuating arm and the Busbar can occur, be compensated.
  • the invention is based on the object of designing and developing the known switching device in such a way that the contact pressure of the contact fingers does not decrease in the event of a short circuit practically regardless of the direction of action of the electrodynamic forces that occur, and in particular that the contact fingers cannot break out.
  • a switching device of the type mentioned at the outset in that a catch element for the contact fingers is arranged on the fixed contact and, in the closed state of the switching device, grips around the ends of the contact fingers projecting beyond the push-on area of the fixed contact on their sides facing away from the push-on area.
  • an abutment is created to a certain extent by the catch element on the end of the actuating arm for the contact fingers, which end makes it impossible for the contact fingers to break out laterally, essentially perpendicular to the pivoting plane. Even if strong external corner forces occur perpendicular to the swivel plane or to the direction of sliding on, the contact fingers are prevented from being lifted off the sliding-on area of the fixed contact by the collecting element.
  • the collecting element also leads to a disproportionate increase in the contact pressure in the event of a short circuit, since it serves as an abutment for the ends of the contact fingers of the switching contact.
  • This construction is also of considerable advantage if there is no arcuate configuration of the component formed by the slide-on area and the mounting arm, a configuration that is only necessary if external electrodynamic forces acting against the slide-on direction can occur in the event of a short circuit in the pivoting plane.
  • the collecting element has an approximately U-shape when viewed in the push-on direction, and short projections on the inner sides of the U-legs form the support surfaces for the ends of the contact fingers. It is also recommended that the collecting element be closed at its rear end in the push-on direction, so that there is a stop for the contact fingers. Possibly. a slide stop can also be integrated into the collecting element at this point.
  • the desired contact pressure is supposed to be generated by forces acting perpendicular to the swivel plane and to the direction of pushing open, on the other hand friction forces occurring in the pushing on direction are undesirable.
  • the collecting element is provided with sliding supports, the sliding supports can easily be designed as insulating supports at the same time with a suitable choice of material.
  • the collecting element has two holding mandrels running parallel to the push-on direction and preferably parallel to the push-on area of the fixed contact.
  • the cross-sectionally essentially contact fingers in cross-section are essentially circular-shaped collecting mandrels, the geometric assignment of the contact fingers to the effective parts of the collecting element is particularly favorable.
  • both mandrels can be fastened to a support plate common to both mandrels, wherein the fastening, at least one of the two mandrels, is carried out with a connecting bolt lying eccentrically to the main axis of the mandrel.
  • the clear width of the collecting element can be set in a particularly simple manner and can thus be adapted particularly easily to different requirements. For the rest, it is advisable to attach the support plate holding the two mandrels to the rear end of the push-on area of the fixed contact, as seen in the push-on direction.
  • the switching device shown in Fig. 1 is an earthing switch for high-voltage switchgear.
  • This switching device works together with a fixed contact 2 connected to a busbar 1 and has a switching contact 4 which can be adjusted in a pivoting plane by means of an actuating arm 3 and which is pivotably mounted on a drive unit 5.
  • the drive unit 5 is mounted at the bottom on a support 6 designed as an insulator, while the fixed contact 2 is arranged at the top of the support 6.
  • the switching contact 4 can thus, as indicated by an arrow in FIG. 1, be brought from an essentially vertical switch-on or closed position and vice versa with the aid of the actuating arm 3.
  • the fixed contact 2 has a slide-on area 8 provided with a slide-on stop 7 and a fastening arm 9 running approximately transversely to the slide-on direction.
  • the slide-on area 8 and the fastening arm 9 together form an arcuate component lying in the pivoting plane.
  • the switching contact 4 has a pair of contact fingers 10, which are in the closed state on both sides on the push-on area 8 and on the push-on stop 7 of the fixed contact 2. In principle, several pairs of contact fingers 10 can also be provided, but this is not shown here.
  • the contact fingers 10 are attached to the end of the actuating arm 3 remote from the drive unit 5.
  • the fixed contact 2 has a catch element 11 on the side of the slide-on area 8 facing away from the actuating arm 3.
  • the contact fingers 10 of the switching contact 4 protrude in the longitudinal direction of the actuating arm 3 beyond the push-on area 8 of the fixed contact 2 and are at their free ends with the sides facing away from the push-on area 8 in engagement with the collecting element 11.
  • the collecting element 11 has approximately U-shape as seen in FIG. Short approaches 12 on the inside of the U-legs, the are connected by the U-web 13, form the support surfaces for the ends of the contact fingers 10. The collecting element 11 is thus closed at its rear end in the push-on direction.
  • FIGS. 4 and 5 show two embodiments of the collecting element 11 in a section according to IV-IV in FIG. 3. It can be clearly seen from both figures that the collecting element 11 has a clear width that decreases in the push-on direction, again indicated by an arrow.
  • the clear width decreasing in the push-on direction is realized in the exemplary embodiments of the collecting element 11 shown in FIGS. 4 and 5 in that the collecting element 11 is provided in the areas that come into contact with the contact fingers 10 with sliding pads 14 that become stronger in the push-on direction, which at the same time are designed as insulation pads.
  • the different shape of the sliding supports 14 in the exemplary embodiments of the collecting element 11 according to FIGS. 4 and 5 leads to different contact pressures at the slide-on area 8 of the fixed contact 2.
  • the catch element 11 is closed at its rear end in the push-on direction and the areas of the catch element 11 which come into contact with the contact fingers 10 of the switching contact 4 have sliding supports 14.
  • both mandrels 15 each have a connecting bolt 17 located eccentrically to their main axis; the mandrels 15 are inserted with their eccentrically located connecting bolt 17 in the support plate 16.
  • the clear width of the collecting element 11, that is, the clear width between the two mandrels 15, can be set in a particularly simple manner and can therefore be adapted particularly easily to different requirements, namely by making use of the eccentricity between the mandrels 15 and their connecting bolts.
  • the catch element 11 as in the previously described exemplary embodiments, is fastened to the rear end of the push-on region 8 of the fixed contact 2, as seen in the push-on direction, in that the support plate 16 is fastened there.
  • the collecting element 11 is pivotably mounted, so that a possibility of self-adjustment is created between the contact fingers 10 of the pivoting switching contact 4 and the collecting element 11.
  • the corner force F E increases the contact pressure of the contact fingers 10 at the slide stop 7 in the event of a short circuit.
  • external corner forces F EE are not present, since the busbar 1, as shown in FIG. 1, runs transversely to the slide-open direction.
  • contraction forces F K of the contact fingers 10 occur, as is shown in FIG. 3. Even if external corner forces F EE are present and are very large, the corresponding contact finger 10 cannot lift off the push-on area 8 of the fixed contact 2, since the catch element 11 prevents it from doing so.

Landscapes

  • Slide Switches (AREA)
  • Tumbler Switches (AREA)
  • Contacts (AREA)
  • Lock And Its Accessories (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Valve Device For Special Equipments (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Claims (10)

1. Appareil de commutation pour des installations de distribution électrique haute tension, en particulier, commutateur de mise à la terre, comprenant un contact fixe (2) raccordé à une barre omnibus 1 et un contact de commutateur (4) réglable au moyen d'un bras de commande (3) dans un plan de pivotement et à même de glisser en plus sur le contact fixe (2), ce contact fixe (2) étant pourvu d'une zone de poussée (8) et le contact de commutateur (4) au moins d'une paire de doigts de contact (10) qui, à l'état fermé de l'appareil de commutation, sont contigus de part et d'autre au contact fixe (2) dans la zone de poussée (8) et font aussi saillie dans le sens longitudinal du bras de commande (3) au-delà de la zone de poussée (8) du contact fixe (2), caractérisé en ce qu'on a disposé, sur le contact fixe (2), un élément capteur (11) pour les doigts de contact (10) qui, à l'état fermé de l'appareil de commutation, entoure les extrémités des doigts de contact (10) faisant saillie au-déla de la zone de poussée (8) du contact fixe (2), en s'appuyant sur leurs côtes éloignés de la zone de poussée (8).
2. Appareil de commutation selon la revendication 1, caractérisé en ce que l'élément capteur (11) a presque la forme d'un U en considérant le sens de la poussée et en ce que de courtes saillies (12) prévues sur les côtés intérieurs des branches de l'U forment les surfaces d'appui pour les extrémités des doigts de contact (10).
3. Appareil de commutation selon l'une quelconque des revendications 1 et 2, caractérisé en ce que l'élément capteur (11) a une largeur intérieure diminuant dans le sens de la poussée.
4. Appareil de commutation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les zones des doigts de contact et de l'élément capteur (11), entrant en liaison les unes avec les autres, sont pourvues d'appuis de glissement (14) et/ou d'agents antifriction.
5. Appareil de commutation selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément capteur (11) est isolé vis-à-vis de la zone de poussée (8) du contact fixe (2).
6. Appareil de commutation selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les doigts de contact (10) sont pliés presque perpendiculairement à l'encontre du sens de la poussée à leurs extrémités libres entrant en prise avec l'élément capteur (11).
7. Appareil de commutation selon l'une quelconque des revendications 1 ou 3 à 6, caractérisé en ce que l'élément capteur (11) comprend deux broches de réception (15) se développant parallèlement au sens de la poussée et, de préférence, parallèlement à la zone de poussée (8) du contact fixe (2).
8. Appareil de commutation selon la revendication 7, caractérisé en ce que les deux broches de réception (15) sont fixées sur une plaque de soutien commune (16) et en ce que la fixation au moins d'une des deux broches de réception (15) est réalisée à l'aide d'un boulon de raccord (17) situé excentriquement à l'axe principal de la broche de réception (15).
9. Appareil de commutation selon la revendication 8, caractérisé en ce que la plaque de soutien (16) est fixée (en considérant le sens de la poussée) sur l'extrémité arrière de la zone de poussée (8) du contact fixe (2).
10. Appareil de commutation selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'élément capteur (11) est fixé à l'état orientable sur le contact fixe (2) dans la zone de poussée (8).
EP84103609A 1983-04-02 1984-04-02 Appareil interrupteur pour des installations à haute tension Expired EP0123941B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103609T ATE24793T1 (de) 1983-04-02 1984-04-02 Schaltgeraet fuer hochspannungsschaltanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3312074 1983-04-02
DE3312074A DE3312074C2 (de) 1983-04-02 1983-04-02 Schaltgerät für Hochspannungsschaltanlagen, insbesondere Erdungsschalter

Publications (2)

Publication Number Publication Date
EP0123941A1 EP0123941A1 (fr) 1984-11-07
EP0123941B1 true EP0123941B1 (fr) 1987-01-07

Family

ID=6195387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103609A Expired EP0123941B1 (fr) 1983-04-02 1984-04-02 Appareil interrupteur pour des installations à haute tension

Country Status (3)

Country Link
EP (1) EP0123941B1 (fr)
AT (1) ATE24793T1 (fr)
DE (2) DE3312074C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513908A1 (de) * 1985-04-17 1986-10-23 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen Freiluftschaltgeraet fuer hochspannungsschaltanlagen
DE102005041637A1 (de) * 2005-08-26 2007-03-01 Siemens Ag Kontaktanordnung mit einem ersten und einem zweiten Kontaktstück

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630510A (en) * 1951-02-12 1953-03-03 Kearney James R Corp Electrical switch
DE1184837B (de) * 1962-02-02 1965-01-07 Sachsenwerk Licht & Kraft Ag Trenn- oder Erdungsschalter
DE1927783B2 (de) * 1969-05-30 1971-04-15 Elektrischer schalter
DE2409527C3 (de) * 1974-02-28 1986-06-19 Ruhrtal Elektrizitätsgesellschaft Hartig GmbH & Co, 4300 Essen Freiluftschaltgerät für Hochspannungsschaltanlagen
GB1534801A (en) * 1977-08-11 1978-12-06 Bbc Brown Boveri & Cie Electric switch

Also Published As

Publication number Publication date
DE3461963D1 (en) 1987-02-12
EP0123941A1 (fr) 1984-11-07
DE3312074A1 (de) 1984-10-11
DE3312074C2 (de) 1986-08-14
ATE24793T1 (de) 1987-01-15

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