ES2020972B3 - PLACEMENT OF SWITCH FOR LARGE POWER TRANSFORMERS. - Google Patents

PLACEMENT OF SWITCH FOR LARGE POWER TRANSFORMERS.

Info

Publication number
ES2020972B3
ES2020972B3 ES87110408T ES87110408T ES2020972B3 ES 2020972 B3 ES2020972 B3 ES 2020972B3 ES 87110408 T ES87110408 T ES 87110408T ES 87110408 T ES87110408 T ES 87110408T ES 2020972 B3 ES2020972 B3 ES 2020972B3
Authority
ES
Spain
Prior art keywords
winding
stage
tapped
tapped winding
voltage
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 - Lifetime
Application number
ES87110408T
Other languages
Spanish (es)
Inventor
Werner Stein
Walter Muller
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Application granted granted Critical
Publication of ES2020972B3 publication Critical patent/ES2020972B3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/343—Preventing or reducing surge voltages; oscillations

Abstract

High power transformers normally contain a low-voltage winding (12), a high-voltage main winding (13) and a tapped winding (14). If the tapped winding is operated in a subtractive and additive manner, when the transformer is excited with an oscillating switching voltage at the resonant frequency of the tapped winding (14), particularly when it is connected subtractively, high voltage amplitudes with respect to earth can occur along the tapped winding (14) at the end of the main winding (13). To reduce and damp-out such resonant frequency oscillations, in the case of known arrangements either each stage or the complete tapped winding (14) was connected in parallel with an R-C element (19, 20). According to the invention, it is now intended that only a single stage of the multi-stage tapped winding (14) is connected in parallel with an R-C element (19, 20), which R-C element also reduces the resonant amplitudes occurring in the other stages because of the transformer coupling between this stage and the other stages. The use of the circuit arrangement according to the invention is expedient in the case of large transformers. This is particularly true in all cases in which a multi- stage tapped winding (14) is provided connected additively and subtractively with respect to the high voltage main winding (13). <IMAGE>
ES87110408T 1986-07-30 1987-07-17 PLACEMENT OF SWITCH FOR LARGE POWER TRANSFORMERS. Expired - Lifetime ES2020972B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3625845 1986-07-30

Publications (1)

Publication Number Publication Date
ES2020972B3 true ES2020972B3 (en) 1991-10-16

Family

ID=6306352

Family Applications (1)

Application Number Title Priority Date Filing Date
ES87110408T Expired - Lifetime ES2020972B3 (en) 1986-07-30 1987-07-17 PLACEMENT OF SWITCH FOR LARGE POWER TRANSFORMERS.

Country Status (7)

Country Link
EP (1) EP0257291B1 (en)
AT (1) ATE61886T1 (en)
BR (1) BR8703907A (en)
DE (1) DE3768736D1 (en)
ES (1) ES2020972B3 (en)
GR (1) GR3001869T3 (en)
PT (1) PT85439B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU716573B2 (en) * 1995-06-28 2000-03-02 Swichtec Power Systems Limited Resonance tapped transformer
EP0763833B2 (en) † 1995-09-14 2012-12-05 Bombardier Transportation GmbH Transformer for an electrically driven vehicle
DE69739888D1 (en) * 1996-04-16 2010-07-08 Markov Gennadij Aleksandr TRANSFORMER
EP2549645A1 (en) * 2011-07-21 2013-01-23 Telefonaktiebolaget LM Ericsson (publ) Transformer filter arrangement
CN102945735A (en) * 2012-11-06 2013-02-27 保定天威集团有限公司 Pre-magnetizing transformer with voltage regulator and manufacture method thereof
BR102021020237A2 (en) * 2021-10-08 2023-04-18 Reson Energy Ltda ELECTRICAL TRANSFORMER WITH RESONANT PRIMARY AND INDUCTIVE SECONDARY AND MANUFACTURING METHOD

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1658664A (en) * 1927-07-06 1928-02-07 Gen Electric Variable-ratio transformer
US1809895A (en) * 1928-10-08 1931-06-16 Frazer W Gay Protective system for transformers
CH275245A (en) * 1948-11-11 1951-05-15 Ceskoslovenske Z Tezkeho Stroj Vibration-free transformer.
FR2007394A1 (en) * 1968-04-05 1970-01-09 Licentia Gmbh
US3644786A (en) * 1970-08-26 1972-02-22 Westinghouse Electric Corp Electrical windings
US3668511A (en) * 1971-02-16 1972-06-06 Mc Graw Edison Co Self energizing tap switch for electronic tap changer
DE2117422A1 (en) * 1971-04-08 1972-10-12 Schorch Gmbh Control transformer with surge voltage protected step winding
DE3338149A1 (en) * 1983-10-20 1985-05-02 Transformatoren Union Ag, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR LARGE POWER TRANSFORMERS

Also Published As

Publication number Publication date
ATE61886T1 (en) 1991-04-15
BR8703907A (en) 1988-04-05
EP0257291A1 (en) 1988-03-02
PT85439B (en) 1993-09-30
DE3768736D1 (en) 1991-04-25
EP0257291B1 (en) 1991-03-20
GR3001869T3 (en) 1992-11-23
PT85439A (en) 1988-07-29

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