EP1831904B1 - Off-circuit tap changer, with actuating mechanism, for electrical transformers - Google Patents

Off-circuit tap changer, with actuating mechanism, for electrical transformers Download PDF

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Publication number
EP1831904B1
EP1831904B1 EP05824695A EP05824695A EP1831904B1 EP 1831904 B1 EP1831904 B1 EP 1831904B1 EP 05824695 A EP05824695 A EP 05824695A EP 05824695 A EP05824695 A EP 05824695A EP 1831904 B1 EP1831904 B1 EP 1831904B1
Authority
EP
European Patent Office
Prior art keywords
tap changer
actuating mechanism
contacts
movable contacts
circuit tap
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.)
Active
Application number
EP05824695A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1831904A1 (en
Inventor
Silvio Dal Lago
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.)
Comem SpA
Original Assignee
Comem SpA
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 Comem SpA filed Critical Comem SpA
Priority to SI200530552T priority Critical patent/SI1831904T1/sl
Priority to PL05824695T priority patent/PL1831904T3/pl
Publication of EP1831904A1 publication Critical patent/EP1831904A1/en
Application granted granted Critical
Publication of EP1831904B1 publication Critical patent/EP1831904B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H9/0027—Operating mechanisms
    • 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
    • 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

Definitions

  • the present invention refers, in general, to an off-circuit tap changer, with actuating mechanism, for electrical transformers.
  • Off-circuit tap changers for electrical transformers are currently known whose structure substantially has an elongated body where a set of fixed stud contacts is integrally made orthogonally in series along the whole length of the elongated body.
  • An off-circuit tap changer for electrical transformers having the above features is known for example from EP-A-354423
  • the elongated body in fact consists of a frame, which laterally has the above-mentioned fixed stud contacts, inside of which there runs at least one support for a pair of movable rubbing-block type contacts, which the user can operate by means of specific controls so that they are brought into opposing positions, and are adapted to alternatively and successively enter into interference with two of the aforementioned fixed contacts.
  • ATCs rack-type high voltage tap changers
  • ATVs screw-type high voltage tap changers
  • the frame constitutes the sliding guide for a slide, adapted to constitute the support for the movable contacts, associated with a bar-shaped body which moves it by means of a longitudinal rack forming part of the slide and coupled with a pinion, which in turn results integral with a composite handle fixed to the transformer body, which the operator can operate by hand.
  • the object of the present invention is to avoid the drawbacks mentioned and, in particular, to create an off-circuit tap changer for electrical transformers, with actuating mechanism, which shows a greater constructive simplicity and which foresees a reduced number of parts with respect to traditional solutions.
  • Another object of the present invention is to create an off-circuit tap changer for electrical transformers, with actuating mechanism, which would be more functional, reliable and robust than traditional tap changers.
  • a further object of the present invention is to realise an off-circuit tap changer for electrical transformers, with actuating mechanism, which would enable tap changers to be produced at a lower design and manufacturing cost than with the known techniques.
  • off-circuit tap changer for electrical transformers with actuating mechanism, made according to claim 1 below.
  • FIGS. 1 and 2 show, respectively, a rack-type high voltage off-circuit tap changer (ATC), generically indicated with 10, and a screw-type high voltage off-circuit tap changer (ATV), generically indicated with 20.
  • ATC rack-type high voltage off-circuit tap changer
  • ATV screw-type high voltage off-circuit tap changer
  • the ATC rack-type high voltage off-circuit tap changer for electrical transformers 10 comprises an outer frame, formed by two parallel bars 11 of substantially rectangular section, which integrally bear stud-shaped fixed contacts 12, arranged orthogonally in series.
  • the movable contacts 14 are adapted to alternatively and successively enter into interference with two fixed contacts 12 of one of the bars 11 or with one fixed contact 12 and a contact strip 16 made on the parallel bar 11 which is at the desired voltage.
  • the sliding guide consists of a longitudinal rack forming part of the central bar-shaped component 13 and coupled with a pinion (not shown in the Figure), which in turn is connected to an operating device 17 for the operator to actuate.
  • each of the fixed stud contacts 12 presents a threaded ring 18 associated with related distributor caps 19 for attaching the cable ends.
  • guard rings 21 can be used, tightly fixed to the external structure of the bars 11 and each connected with the stud of the nearest fixed contact 12 so as to be at the same potential as that contact.
  • the set of movable contacts 14 may take the form of medium-voltage fixed-point and/or pawl tap changers and is protected inside protective elements 22, realised in plastic material and double shoulder shaped in order to provide considerable stability.
  • FIG. 2 schematically shows a screw-type (ATV) high-voltage tap changer, indicated generically with 20, which differs with respect to the rack-type high-voltage tap changer 10 due to the typology of operation of the set of movable contacts 14.
  • ATV screw-type
  • the set of movable contacts 14 is made to slide over the fixed contacts 12 by means of a worm screw 23 (the so-called “large screw”) which is associated with the set of movable contacts 14 by means of a coupling component 24, which is integral with the nut thread 25 (which in the exemplifying and preferred embodiment consists of a lead nut).
  • a worm screw 23 the so-called "large screw”
  • a coupling component 24 which is integral with the nut thread 25 (which in the exemplifying and preferred embodiment consists of a lead nut).
  • the worm screw 23 can be operated from the outside by means of a movement device 26 available to the operator.
  • the off-circuit tap changer for electrical transformers, with actuating mechanism, according to the present invention has the same mechanical and electrical components as the tap changer typologies examined so far, and moreover is foresees an actuating mechanism (shown in detail in Figure 3 ) comprising a worm screw 23 (analogous to that used in the screw-type high-voltage tap changer), coaxial and inside an insulating tube 27 preferably realised in phenolic resin, on which the nut thread is fitted or made at one end part.
  • the coupling 24 is connected to the end portion of the tube 27, and bears the set of movable contacts 14, housed inside a shaped protective structure 22.
  • the coupling 24 is further connected with the tube 27 by means of the interposition of a shaped adaptor 28, which allows for the coupling between the nut thread and the set of movable contacts 14.
  • the overall structure of the tap changer indeed, is decidedly simpler than that of traditional ones, yet functional and robust; moreover, such structure can, as we have seen, be readily adapted to various transformer typologies, including many that have already gone into production.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Push-Button Switches (AREA)
  • Slide Switches (AREA)
EP05824695A 2004-12-27 2005-12-23 Off-circuit tap changer, with actuating mechanism, for electrical transformers Active EP1831904B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200530552T SI1831904T1 (sl) 2004-12-27 2005-12-23 Menjalnik odcepov pri izklopljenem vezju s sproĺ˝ilnim mehanizmom za elektriäśne transformatorje
PL05824695T PL1831904T3 (pl) 2004-12-27 2005-12-23 Przełącznik odczepów transformatorów elektrycznych pracujący w stanie odłączenia z mechanizmem uruchamiającym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000307A ITVI20040307A1 (it) 2004-12-27 2004-12-27 Commutatore senza tensione con manovra per trasformatori elettrici
PCT/EP2005/014179 WO2006069802A1 (en) 2004-12-27 2005-12-23 Off-circuit tap changer, with actuating mechanism, for electrical transformers

Publications (2)

Publication Number Publication Date
EP1831904A1 EP1831904A1 (en) 2007-09-12
EP1831904B1 true EP1831904B1 (en) 2008-11-19

Family

ID=36121421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05824695A Active EP1831904B1 (en) 2004-12-27 2005-12-23 Off-circuit tap changer, with actuating mechanism, for electrical transformers

Country Status (11)

Country Link
EP (1) EP1831904B1 (uk)
AT (1) ATE414982T1 (uk)
BR (1) BRPI0519158A2 (uk)
DE (1) DE602005011180D1 (uk)
ES (1) ES2315941T3 (uk)
IT (1) ITVI20040307A1 (uk)
PL (1) PL1831904T3 (uk)
RU (1) RU2377683C2 (uk)
SI (1) SI1831904T1 (uk)
UA (1) UA86275C2 (uk)
WO (1) WO2006069802A1 (uk)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011113718A1 (de) * 2011-09-17 2013-03-21 Maschinenfabrik Reinhausen Gmbh Laststufenschalter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
JPS58222506A (ja) * 1982-06-18 1983-12-24 Hitachi Ltd 負荷時タツプ切換器
DE3827388A1 (de) * 1988-08-12 1990-02-15 Reinhausen Maschf Scheubeck Zylindrischer stufenwaehler fuer stufentransformatoren mit durch anschlussleitungen gehaltenen kontaktringen
DE3829489C2 (de) * 1988-08-31 1993-11-18 Reinhausen Maschf Scheubeck Zylindrischer Stufenwähler für Stufentransformatoren

Also Published As

Publication number Publication date
DE602005011180D1 (de) 2009-01-02
SI1831904T1 (sl) 2009-04-30
BRPI0519158A2 (pt) 2008-12-30
UA86275C2 (uk) 2009-04-10
ES2315941T3 (es) 2009-04-01
PL1831904T3 (pl) 2009-04-30
RU2377683C2 (ru) 2009-12-27
RU2007122791A (ru) 2009-02-10
WO2006069802A1 (en) 2006-07-06
EP1831904A1 (en) 2007-09-12
ITVI20040307A1 (it) 2005-03-27
ATE414982T1 (de) 2008-12-15

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