EP0123941A1 - 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
EP0123941A1
EP0123941A1 EP84103609A EP84103609A EP0123941A1 EP 0123941 A1 EP0123941 A1 EP 0123941A1 EP 84103609 A EP84103609 A EP 84103609A EP 84103609 A EP84103609 A EP 84103609A EP 0123941 A1 EP0123941 A1 EP 0123941A1
Authority
EP
European Patent Office
Prior art keywords
contact
switching device
collecting element
sliding
slide
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.)
Granted
Application number
EP84103609A
Other languages
German (de)
English (en)
Other versions
EP0123941B1 (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 GmbH
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 GmbH, Ruhrtal Elektrizitatsgesellschaft Hartig GmbH and Co filed Critical RUHRTAL GmbH
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 or the like and a switching contact which can be pivoted in a swivel plane by means of a swivel arm, the fixed contact being a push-on contact which is preferably provided with a push-on stop and possibly approximately at right angles to the push-on direction extending fastening arm and the switching contact has at least one pair of contact fingers in the closed state on both sides of the slide-on contact and possibly on the slide-on stop, and preferably the slide-on contact and the fastening arm together form an arcuate component which is open in the slide-on direction and lies in the pivoting plane.
  • the known switching device for high-voltage switchgear from which the invention is based (see DE-AS 24 09 527), is designed so that the sliding contact protrudes from the mounting arm in the sliding direction and that the contact fingers in the closed state of the switching device outside the area of the mounting arm rest on the slide-on contact with point contact.
  • the geometric design in the event of a short circuit leads to the contact pressure of the contact fingers at the slide stop being increased and being taken up by the fixed contact.
  • the slide stop also becomes a current path for the short-circuit current, 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 slide-on contact and the fastening arm deliberately generates so-called corner forces, which lead to an increase in the contact pressure at the slide-on stop in the event of a short circuit or by the corner forces acting externally against the slide-on direction, such as between the swivel 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, regardless of the direction of action of the electrodynamic forces that occur, and in particular that the switching device is not broken open .
  • the switching device in which the above-mentioned object is achieved, is characterized in that the fixed contact has a catch element on the side of the sliding contact facing away from the swivel arm and, when closed, the contact fingers of the switching contact protrude in the longitudinal direction of the swivel arm beyond the sliding contact of the fixed contact and are engaged at their free ends with the sides facing away from the sliding contact with the collecting element.
  • an abutment is created to a certain extent by the catch element at the end of the swivel arm remote from the pivot point for the contact fingers, which makes lateral, essentially perpendicular to the pivoting plane breaking open of the switching device impossible. Even if strong external corner forces occur perpendicular to the swivel plane or to the direction of sliding open, the con tact finger from sliding contact prevented 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.
  • the collecting element has two retaining strips which are approximately L-shaped in cross-section to the direction of slide-open and each have an L-leg directed towards one another.
  • the free ends of the contact fingers come into engagement here with the sides facing away from the slide-on contact, that is to say the outer sides, at the free ends of the L-legs of the retaining strips directed towards one another.
  • the collecting element can also be closed above the L-legs directed towards one another, that is to say to a certain extent form a box profile open on one side.
  • the collecting element is provided with sliding supports, the sliding supports can readily 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 contact.
  • the cross-sectionally circular Contact fingers in cross-section are assigned essentially circular collecting mandrels, the geometrical assignment of the contact fingers to the effective parts of the collecting element is particularly favorable.
  • the mandrels can be attached to a support plate common to both mandrels.
  • a further teaching of the invention is to attach at least one of the two mandrels to the support plate with a connecting bolt lying eccentrically to the main axis of the mandrel, preferably to both mandrels, each with a connecting bolt lying eccentrically to the main axis of the mandrel to attach the support plate.
  • the clear width of the collecting element can be set particularly easily 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 slide-on contact, as seen in the direction of slide-on.
  • 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 pivoted in a pivoting plane by means of a pivot 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 in FIG. 1 by an arrow, be brought from an essentially horizontal switch-off or opening position into a substantially vertical switch-on or closing position and vice versa with the aid of the swivel arm 3.
  • the fixed contact 2 has a slide-on contact 8 provided with a slide-on stop 7 and a fastening arm 9 running approximately transversely to the slide-on direction.
  • the slide-on contact 8 and the fastening arm 9 together form an arcuate component which is open in the slide-on direction and lies 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 sliding contact 8 and on the sliding stop 7 of the fixed contact 2. In principle, several pairs of contact fingers can also be provided, but this is not shown here.
  • the contact fingers 10 are attached to the end of the swivel arm 3 remote from the drive unit 5.
  • the fixed contact 2 has a catch element 11 on the side of the slide-on contact 8 facing away from the swivel arm 3.
  • the contact fingers 10 of the switching contact 4 protrude in the longitudinal direction of the swivel arm 3 beyond the sliding contact 8 of the fixed contact 2 and are at their free ends with the sides facing away from the sliding contact 8 with the collecting element 11.
  • the ' collecting element 11 has two holding strips 12 which are approximately L-shaped in cross-section to the sliding direction and each have an L-leg directed towards one another.
  • the holding strips 12 are connected by a transverse web 13 to form a box section which is open on one side.
  • the collecting element 11 is otherwise 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 seen from both figures Lich recognize that the collecting element 11 has a diminishing in the again indicated by an arrow pushing open width. This 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 coming into contact with the contact fingers 10 with sliding pads 14 which 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 sliding contact 8.
  • FIGS. 6 and 7 The embodiment of a switching device according to the invention shown in FIGS. 6 and 7 does not differ significantly from the previously described embodiments. Also in the embodiment shown in FIGS. 6 and 7, the catch element 11 is closed at its rear end in the push-on direction and have the areas of the catch element 11 which come into contact with the contact fingers 10 of the switching contact 4 on sliding supports 14.
  • the collecting element 11 has two holding mandrels 15 which run parallel to the push-on direction and parallel to the push-on contact 8.
  • the mandrels 15 are attached to a support plate 16 common to both mandrels 15.
  • 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 particularly easily and can therefore be adapted to different requirements in a particularly simple manner, namely by making use of the eccentricity between the mandrels 15 and their connecting bolts.
  • the collecting element 11 is attached to the rear end of the sliding contact 8, as seen in the push-on direction, namely in that the support plate 16 is fastened there .
  • the collecting element 11 is pivotally 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 increases the contact pressure of the contact fingers 10 on 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 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 sliding contact 8 because it is prevented from doing so by the collecting element 11.

Landscapes

  • Slide Switches (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Valve Device For Special Equipments (AREA)
  • Lock And Its Accessories (AREA)
  • Tumbler Switches (AREA)
  • Contacts (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
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
DE3312074A DE3312074C2 (de) 1983-04-02 1983-04-02 Schaltgerät für Hochspannungsschaltanlagen, insbesondere Erdungsschalter
DE3312074 1983-04-02

Publications (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198506A2 (fr) * 1985-04-17 1986-10-22 Ruhrtal-Elektrizitätsgesellschaft Hartig GmbH & Co. Appareil interrupteur à coupure dans l'air pour circuits à haute tension
WO2007023093A1 (fr) 2005-08-26 2007-03-01 Siemens Aktiengesellschaft Dispositif de contact presentant un element de limitation qui limite la deviation de la piece de contact mobile

Citations (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
DE1927783A1 (de) * 1969-05-30 1970-12-17 Siemens Ag Elektrischer Schalter
DE2409527A1 (de) * 1974-02-28 1975-09-04 Ruhrtal Gmbh Freiluftschaltgeraet fuer hochspannungsschaltanlagen
GB1534801A (en) * 1977-08-11 1978-12-06 Bbc Brown Boveri & Cie Electric switch

Patent Citations (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
DE1927783A1 (de) * 1969-05-30 1970-12-17 Siemens Ag Elektrischer Schalter
DE2409527A1 (de) * 1974-02-28 1975-09-04 Ruhrtal Gmbh Freiluftschaltgeraet fuer hochspannungsschaltanlagen
GB1534801A (en) * 1977-08-11 1978-12-06 Bbc Brown Boveri & Cie Electric switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198506A2 (fr) * 1985-04-17 1986-10-22 Ruhrtal-Elektrizitätsgesellschaft Hartig GmbH & Co. Appareil interrupteur à coupure dans l'air pour circuits à haute tension
EP0198506A3 (en) * 1985-04-17 1989-03-22 Ruhrtal-Elektrizitatsgesellschaft Hartig Gmbh & Co. Air-break switchgear for high-tension circuits
WO2007023093A1 (fr) 2005-08-26 2007-03-01 Siemens Aktiengesellschaft Dispositif de contact presentant un element de limitation qui limite la deviation de la piece de contact mobile
CN101248503B (zh) * 2005-08-26 2011-07-06 西门子公司 带有限制可移动的接触件偏转的限制元件的触点装置

Also Published As

Publication number Publication date
DE3312074C2 (de) 1986-08-14
EP0123941B1 (fr) 1987-01-07
DE3461963D1 (en) 1987-02-12
DE3312074A1 (de) 1984-10-11
ATE24793T1 (de) 1987-01-15

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