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EP0185119A1 - Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler - Google Patents

Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler Download PDF

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Publication number
EP0185119A1
EP0185119A1 EP84201885A EP84201885A EP0185119A1 EP 0185119 A1 EP0185119 A1 EP 0185119A1 EP 84201885 A EP84201885 A EP 84201885A EP 84201885 A EP84201885 A EP 84201885A EP 0185119 A1 EP0185119 A1 EP 0185119A1
Authority
EP
European Patent Office
Prior art keywords
contact
cut
fixed contact
clamp
support
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.)
Withdrawn
Application number
EP84201885A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Dufrasne
Etienne Koch
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.)
Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
ACEC SA
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 Ateliers de Constructions Electriques de Charleroi SA, ACEC SA filed Critical Ateliers de Constructions Electriques de Charleroi SA
Priority to EP84201885A priority Critical patent/EP0185119A1/de
Publication of EP0185119A1 publication Critical patent/EP0185119A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • H01H2009/0022—Mounting of the fixed contacts or taps on cylindrical wall of oil vessel containing the tap changer; Details of screening

Definitions

  • the invention relates to a cut-off module for on-load selector comprising cut-off rollers and a clamp contact for collaborating with different ranges of the same fixed contact.
  • the improvement in the resistance of fixed and mobile electrical contacts to short circuits is frequently obtained by increasing the number of contact points between the fixed elements and the mobile elements.
  • This solution has the drawback of leading to a larger diameter of the insulating tube which defines the external contour of the device and to greater difficulty in accommodating this tube in the tank of the power transformer.
  • Another solution is to increase the pressure in which the rollers of the movable contact are applied to the fixed elements. This solution has the disadvantage of leading to premature wear of the various organs in relative motion.
  • L t invention as characterized in the claims solves the problem by creating a load tap selector for switching module which completely separates the electrical and mechanical functions of the various elements to avoid a quality degradation safely contacts in operation.
  • the cut-off module according to the invention is characterized in that cut-off rollers are applied to a pad, located at a first level of the fixed contact, by a spring device acting through the inter medium of an insulating part, in that a clamp contact collaborates with other pads, located at a second level of the fixed contact, and in that a fixed contact support, provided with several watertight anchoring points , combines the range of the first level with the ranges of the second level of the fixed contact.
  • the cut-off module is distinguished by a long service life, it offers a geometric arrangement which greatly improves the resistance to short circuits without increasing the diameter of the insulating tube, it allows several construction variants.
  • This figure shows, in section, a set of roller contacts and a clamp contact, distributed in two levels and called subsequently cut-off module.
  • a cut-off module 1 collaborates with a fixed contact 2 formed by a fixed contact support 3, made of electrolytic copper, arranged vertically along an insulating tube 4, fixed to the latter in its upper part, later called upper stage contact, by a bushing stud 5-whose threaded end receives a nut 6 used to hold a guard ring 7 and a metal washer 8 threaded on the bushing stud 5.
  • the metal washer 8 supports a seal 9 which bears on a flat surface 10 of the insulating tube 4.
  • the through stud 5 carries an internal thread, not shown, intended to receive a screw for fixing an electrical connection cable, not shown.
  • the fixed contact support 3 is positioned in its lower part, subsequently called the lower contact stage by a lug 11 onto which a screw 12 is screwed serving to maintain a seal 13.
  • the fixed contact support 3 is secured to a vertically disposed pad, subsequently called a vertical pad 14, and covered with a layer 15 made of a material resistant to erosion by the arc electric.
  • the fixed contact support 3 is secured to a horizontal branch 16 having two contact pads, consisting respectively of the upper face and the lower face of the horizontal branch 15 and identified respectively at 17 and 18, to collaborate with a clamp contact 19.
  • the clamp contact 19 is formed by two contact elements, subsequently called clamp contact elements and identified at 20 and 21, establishing a double bridge of electrical contacts between the contact pads 17 and 18 of the horizontal branch 16 of the fixed contact. 2 and contact pads 22, 23 of a horizontal tab 24 of a movable contact support 25.
  • the elements of the clamp contact 20 and 21 are joined by a rod 26 provided at one end with a head 27, bearing on an element of the clamp contact 20, and the other end of which is provided with a groove in which engages a retaining ring 28 to compress a helical spring later called a clamp spring 29 threaded on the rod 26 and resting on the other clamp contact element 21 by means of an insulating washer 30 .
  • the end of the rod 26 is protected by a guard ring 31.
  • each of the clamp contact elements 20 and 21 carries a central notch respectively marked at 32 and 33 into which engage a pin 34 fixed to the horizontal tab 24 of the movable contact support 25.
  • each end of the pads 17 and 18 has an inclined face marked respectively at 35 and 36.
  • the pads 17 and 18 collaborating with the clamp contact 19 are arranged as close as possible to an anchoring point of the fixed contact 2 on the insulating tube 4 .
  • the movable contact support 25 consists of a lower vertical branch 37, leading the current to a crown not shown, and of a horizontal branch 38 serving for the attachment of the support movable contact 25 on an inner tube 39.
  • the movable contact support 25 also comprises an upper vertical branch 40 serving for the connection of a central stirrup 41 belonging to an assembly called movable assembly in patent EP 0029467 consisting of a telescopic central stirrup and two oscillating end stirrups.
  • the figure shows the central stirrup 41, the two branches 42 and 43 of which allow the sliding of an insulating part 44 formed by two external parts forming slides and identified at 45 and 46 and an internal part 47 forming a piston.
  • the two slides 45 and 46 of the insulating piece 44 carries at the end a bore allowing the passage of a shaft 48 on which are threaded two contact rollers subsequently called cut rollers 49 and 50, of the same diameter and collaborating with the vertical surface 14 of the fixed contact support 3.
  • the two cut-off rollers 49 and 50 are covered with a layer of a material resistant well to the erosion of the electric arc and are applied to the layer 15, consisting of 'a similar material, covering the vertical range 14.
  • the two cutting rollers 49 and 50 are applied to the vertical range 14. of the fixed contact 2 with mechanical pressure exerted by a compression spring subsequently called the spring of the central caliper 51 housed in a socket 52 secured to the internal part 47 of the insulating part 44.
  • the two cut-off rollers 49 and 50 are applied to the internal faces of the two branches 42 and 43
  • roller spring 53 threaded on the shaft 48 and tending to separate the cut rollers 49 and 50 from one another.
  • the vertical surface 14 and the layer 15 which covers it are bevelled at both ends.
  • the central bracket 41 is secured to the movable contact support 25 by a lug 54 applied against the upper vertical branch 40 by a screw 55.
  • the displacement of the cutting module 1 is done by rotation of the inner tube 39 rotating around its axis, not shown, and driving through the movable contact support 25 both the central bracket 41 and its cut rollers 49 and 50 and the clamp contact 19.
  • the cut-off module 1 comes close to the fixed contact 2, at the upper contact level, the cut-off rollers 49 and 50 approach the vertical range 14 and the layer 15 which covers it by an inclined surface thus causing the progressive compression of the spring center bracket 51.
  • the clamp contact 19 approaches the inclined faces 35 and 36 of the pads 17 and 18 of the horizontal branch 16 of the fixed contact 2 and cause the compression of the clamp spring 29.
  • the breaking module 1 When, in the embodiment of the figure, the breaking module 1 is stopped in front of the fixed contact 2, the current, brought by the cable to the bushing stud 5, is distributed between the upper contact level and the lower contact level in proportion to the conductivity of the paths offered to the current.
  • a first path, offered to the current at the upper level of contact, is made from the crossing stud 5, through the vertical track 14 and its layer 15 made of material resistant well to the erosion of the electric arc, the layers similar covering the cutting rollers 49 and 50, the sides of these rollers, the internal faces of the branches 42 and 43 of the central stirrup 41, the lug 54, the upper vertical branch 40 of the movable contact support 25 to reach the branch lower vertical 37.
  • the second path, offered to the current at the lower contact level, is at the start of the crossing stud 5 along the fixed contact support 3, the horizontal branch 16, passes through the pads 17 and 18 and the contact elements. with clamps 20 and 21, of the horizontal tab 24 of the movable contact support 25 to reach the lower vertical branch 37.
  • this clamp contact 19 offers excellent resistance to the separation forces which appear between the fixed contacts and the mobile contacts following the constriction of the lines of contact. current at the crossing points creating repulsion efforts.
  • another embodiment includes, on the height of the cutting rollers 49 and 50 an insulating pad inserted in the central part of the vertical pad 14.
  • Another exemplary embodiment consists in reversing the contact levels by placing the clamp contact 19 at the upper contact level and the cut-off rollers 49 and 50 held by the central stirrup 41 at the lower contact level.

Landscapes

  • Installation Of Indoor Wiring (AREA)
EP84201885A 1984-12-17 1984-12-17 Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler Withdrawn EP0185119A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP84201885A EP0185119A1 (de) 1984-12-17 1984-12-17 Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84201885A EP0185119A1 (de) 1984-12-17 1984-12-17 Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler

Publications (1)

Publication Number Publication Date
EP0185119A1 true EP0185119A1 (de) 1986-06-25

Family

ID=8192506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201885A Withdrawn EP0185119A1 (de) 1984-12-17 1984-12-17 Unterbrechungseinheit mit Kontaktklammern für Stuffenwähler

Country Status (1)

Country Link
EP (1) EP0185119A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415044A3 (en) * 1989-08-28 1991-12-27 Maschinenfabrik Reinhausen Gmbh Contact arrangement for tap-changers or tap transformers
EP0994495A3 (de) * 1998-10-15 2001-04-18 MASCHINENFABRIK REINHAUSEN GmbH Elektrischer Kontakt
CN102054599A (zh) * 2009-11-06 2011-05-11 贵州长征电力设备有限公司 切换开关的升降旋转机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH489878A (de) * 1968-06-25 1970-04-30 Reinhausen Maschf Scheubeck Lastumschalter für Stufenschalter mit einem druckdichten Ölgefäss an einem Regeltransformator
FR2117375A5 (de) * 1970-12-04 1972-07-21 Reinhausen Kg Maschf
FR2146069A7 (de) * 1971-07-15 1973-02-23 Reinhausen Kg Maschf
EP0029467A1 (de) * 1979-11-21 1981-06-03 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Elektrischer Apparat mit einer Reihe von Spannungsanzapfungen und einer beweglichen Wählerausstattung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH489878A (de) * 1968-06-25 1970-04-30 Reinhausen Maschf Scheubeck Lastumschalter für Stufenschalter mit einem druckdichten Ölgefäss an einem Regeltransformator
FR2117375A5 (de) * 1970-12-04 1972-07-21 Reinhausen Kg Maschf
FR2146069A7 (de) * 1971-07-15 1973-02-23 Reinhausen Kg Maschf
EP0029467A1 (de) * 1979-11-21 1981-06-03 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Elektrischer Apparat mit einer Reihe von Spannungsanzapfungen und einer beweglichen Wählerausstattung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415044A3 (en) * 1989-08-28 1991-12-27 Maschinenfabrik Reinhausen Gmbh Contact arrangement for tap-changers or tap transformers
EP0994495A3 (de) * 1998-10-15 2001-04-18 MASCHINENFABRIK REINHAUSEN GmbH Elektrischer Kontakt
CN102054599A (zh) * 2009-11-06 2011-05-11 贵州长征电力设备有限公司 切换开关的升降旋转机构
CN102054599B (zh) * 2009-11-06 2013-03-27 贵州长征电力设备有限公司 切换开关的升降旋转机构

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Inventor name: DUFRASNE, JEAN-CLAUDE

Inventor name: KOCH, ETIENNE