EP0294653A1 - Sélecteur de prises hors charge pour transformateurs - Google Patents

Sélecteur de prises hors charge pour transformateurs Download PDF

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Publication number
EP0294653A1
EP0294653A1 EP88108351A EP88108351A EP0294653A1 EP 0294653 A1 EP0294653 A1 EP 0294653A1 EP 88108351 A EP88108351 A EP 88108351A EP 88108351 A EP88108351 A EP 88108351A EP 0294653 A1 EP0294653 A1 EP 0294653A1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
tap changer
snap
winding
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Withdrawn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
EP88108351A
Other languages
German (de)
English (en)
Inventor
Werner Widmann
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0294653A1 publication Critical patent/EP0294653A1/fr
Withdrawn legal-status Critical Current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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/242—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting the contact forming a part of a coil spring

Definitions

  • the invention relates to tap changers for transformers with a fine-stage winding which is electrically connected in series with a high-voltage main winding and which, depending on the position of an inverter which can only be operated in the no-load state, is additive or subtractive to the high-voltage main winding, with the turner for each phase on a common switching arm other than the main current-carrying contacts each time after this and at a higher speed than these opening snap-action contacts, which are driven to open the contact by a separate energy store.
  • tap changers for transformers in most applications also contain a selection, often referred to as a turner.
  • a fine-stage winding of the transformer is switched either additively or subtractively to the main winding by the turner, so that the setting range is doubled.
  • the fine-stage winding is temporarily not connected to the main winding while the turner is actuated.
  • the fine stage winding then assumes a potential resulting from the capacities of the fine stage winding against the main winding and the free stage winding against earth as well as from the mean operating voltage of the main winding.
  • the invention is therefore based on the object for tap changers of transformers to provide a reversing contact arrangement which can be retrofitted in a simple manner with snap-action contacts, the snap-action contacts reducing the electrical work carried out in the switching opening spark to less than a third of the value due to a higher opening speed than the main contacts achieve with known arrangements.
  • the snap switch according to the invention enables the usual turner structure to be retained and advantageously requires very little additional space exclusively in the axial direction, so that the accommodation of appropriately equipped tap changers in transformers is possible without any problems.
  • fixed contacts 4 and 14 designed as knife contacts are fastened to vertical insulating rods 21.
  • the fixed contacts 4 and 14 can be connected via a switching bridge made of resiliently pressed contact strips 22 to a further fixed contact 3, also carried by a vertical insulating rod 21.
  • a guide body 23 for the contact strip 22 is guided and driven by two pivotable insulating material rods 24.
  • an intermediate contact 15 is provided in addition to the fixed contacts 4 and 14, which is also carried by an insulating rod 21 and can be connected to the fixed contact 3 via the contact strips 22.
  • U-shaped fixed contacts 25 are fastened in horizontal cross section to the insulating rods 21 in such a way that they surround the free ends of snap-action contacts 26 carrying handles 27.
  • the two free legs of the cross-sectionally U-shaped fixed contacts 25 are offset from one another in the axial direction so that each leg only projects into the path of a single snap switch contact 26.
  • the stems 27 each consist of a helical spring, are consequently flexible and are in turn clamped in bearing blocks 28 carried by the guide body 23.
  • the fixed contacts 25 are carried by screws 29, the heads of which lie in shield bodies 30.
  • FIGS. 4 and 5 show circuit examples for the use of inverters 31 according to the invention.
  • One high-voltage master winding 17 has one end at an high-voltage connection 1 and is connected at its other end to both a selector contact 3 and a fixed contact 3 in the turner 31.
  • a fine-stage winding 18 is electrically connected in series with the high-voltage main winding 17 by the turner 31, depending on its position, additively or subtractively.
  • Selector arms 20 can be switched over in a currentless manner via selector contacts 5 to 13 and 3.
  • the required load current switches are carried out by a load switch 1, the movable contact of which is connected to a low-voltage connection 2.
  • the ends of the fine stage winding 18 are connected to the fixed contacts 4 and 14 in the turner 31.
  • the additionally provided intermediate contact 15 is galvanically connected to the center of the fine-stage winding 18 via a linkage resistor 16.
  • the reverser arrangement supplemented according to the invention by snap-action contacts 26, ensures that when the contact strips 22 run off, even from one of the fixed contacts 4 or 14, no potential difference can occur on the open contact path, because the snap-action contacts 26 are initially galvanically connected to the fixed contact 4 or 14 connected fixed contact 25 are held. Only when the contact opening distance has reached a certain dimension, for example 8 mm, is the snap switch contact 26 seated on a resilient handle released and moves away from the fixed contact 25 at a much higher speed than the contact strips 22 from one of the fixed contacts 4 or 14. As a result the thereby increased contact opening speed, discharge processes possibly occurring as a result of potential differences are ended very quickly, so that overall only very small amounts of energy are introduced into the transformer oil.
  • the switchover occurs mechanically in the same way, but electrically without interruption, ie the fixed contact 3 galvanically connected to at least one of the fixed contacts 4, 14 or 15 at any moment.
  • part of the fine-stage winding 18 is inevitably short-circuited for a short time, so that the corresponding short-circuit current must be switched off at the end of each switching step.
  • the snap switch contact proves to be very advantageous due to its high contact opening speed.
  • contact bridges 22 that belong together with the snap switch contact 26 assigned to them and / or the fixed contacts 4, 15 and 14 are electrically insulated from the fixed contact 25 assigned to them and the mutually electrically isolated components that are associated with one another are galvanically interconnected via high-impedance damping resistors connected. This measure further reduces the amount of energy released in the discharge processes during switching.

Landscapes

  • Housings And Mounting Of Transformers (AREA)
EP88108351A 1987-06-09 1988-05-25 Sélecteur de prises hors charge pour transformateurs Withdrawn EP0294653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719144 1987-06-09
DE3719144 1987-06-09

Publications (1)

Publication Number Publication Date
EP0294653A1 true EP0294653A1 (fr) 1988-12-14

Family

ID=6329284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108351A Withdrawn EP0294653A1 (fr) 1987-06-09 1988-05-25 Sélecteur de prises hors charge pour transformateurs

Country Status (1)

Country Link
EP (1) EP0294653A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008474A1 (de) * 2004-02-20 2005-09-08 Infineon Technologies Ag Verfahren zur Reduzierung von Beugungsbildern bei der optischen Inspektion eines Halbleiterwafers und optisches Inspektionsgerät
DE102009025358B4 (de) * 2009-06-18 2013-06-20 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit einem Vorwähler
WO2013120642A1 (fr) * 2012-02-13 2013-08-22 Maschinenfabrik Reinhausen Gmbh Transformateur équipé d'un système de commutation à gradins
WO2016034438A1 (fr) * 2014-09-04 2016-03-10 Maschinenfabrik Reinhausen Gmbh Système de circuit pour un transformateur de réglage, notamment présélecteur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049287A (en) * 1979-04-03 1980-12-17 Reinhausen Maschf Scheubeck Three phase load selector for a tapped transformer
DE3224860A1 (de) * 1981-08-25 1983-03-10 Elin-Union Aktiengesellschaft für elektrische Industrie, 1141 Wien Wenderschalter fuer stufenschalter von transformatoren
FR2560465A1 (fr) * 1984-02-29 1985-08-30 Reinhausen Kg Maschf Selecteur en charge pour transformateurs a prise avec des contacts de commutation susceptibles de rouler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049287A (en) * 1979-04-03 1980-12-17 Reinhausen Maschf Scheubeck Three phase load selector for a tapped transformer
DE3224860A1 (de) * 1981-08-25 1983-03-10 Elin-Union Aktiengesellschaft für elektrische Industrie, 1141 Wien Wenderschalter fuer stufenschalter von transformatoren
FR2560465A1 (fr) * 1984-02-29 1985-08-30 Reinhausen Kg Maschf Selecteur en charge pour transformateurs a prise avec des contacts de commutation susceptibles de rouler

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004008474A1 (de) * 2004-02-20 2005-09-08 Infineon Technologies Ag Verfahren zur Reduzierung von Beugungsbildern bei der optischen Inspektion eines Halbleiterwafers und optisches Inspektionsgerät
DE102009025358B4 (de) * 2009-06-18 2013-06-20 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit einem Vorwähler
WO2013120642A1 (fr) * 2012-02-13 2013-08-22 Maschinenfabrik Reinhausen Gmbh Transformateur équipé d'un système de commutation à gradins
US9123464B2 (en) 2012-02-13 2015-09-01 Maschinenfabrik Reinhausen Gmbh Transformer with on-load tap changer
EP2815411B1 (fr) 2012-02-13 2017-05-31 Maschinenfabrik Reinhausen GmbH Transformateur équipé d'un système de commutation à gradins
RU2632194C2 (ru) * 2012-02-13 2017-10-03 Машиненфабрик Райнхаузен Гмбх Трансформатор со ступенчатым переключателем
WO2016034438A1 (fr) * 2014-09-04 2016-03-10 Maschinenfabrik Reinhausen Gmbh Système de circuit pour un transformateur de réglage, notamment présélecteur
CN106716578A (zh) * 2014-09-04 2017-05-24 赖茵豪森机械制造公司 用于可调式变压器的开关装置、特别是预选器
JP2017527996A (ja) * 2014-09-04 2017-09-21 マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 制御変圧器用の切換装置、特に予備選択器
RU2672856C2 (ru) * 2014-09-04 2018-11-20 Машиненфабрик Райнхаузен Гмбх Коммутационная система для регулировочного трансформатора, в частности преселектор
CN106716578B (zh) * 2014-09-04 2019-08-20 赖茵豪森机械制造公司 用于可调式变压器的预选器
US10692664B2 (en) 2014-09-04 2020-06-23 Maschinenfabrik Reinhausen Gmbh Preselector switch assembly for a variable transformer

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