EP0216125A1 - Unter Last umschaltbarer Stufentransformator - Google Patents

Unter Last umschaltbarer Stufentransformator Download PDF

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Publication number
EP0216125A1
EP0216125A1 EP86111362A EP86111362A EP0216125A1 EP 0216125 A1 EP0216125 A1 EP 0216125A1 EP 86111362 A EP86111362 A EP 86111362A EP 86111362 A EP86111362 A EP 86111362A EP 0216125 A1 EP0216125 A1 EP 0216125A1
Authority
EP
European Patent Office
Prior art keywords
fixed
contacts
tap
movable contact
taps
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
EP86111362A
Other languages
English (en)
French (fr)
Other versions
EP0216125B1 (de
Inventor
Kazuo Itami Seisakusho Yoshida
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to AT86111362T priority Critical patent/ATE64037T1/de
Publication of EP0216125A1 publication Critical patent/EP0216125A1/de
Application granted granted Critical
Publication of EP0216125B1 publication Critical patent/EP0216125B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Definitions

  • This invention relates to an on-load tap changing transformer, and more particularly to an improvement in its tap changing.
  • FIG.lA shows on-load tap changing transformer of the prior art.
  • Reference numeral 1 denotes a main winding of transformer
  • reference numeral 2 denotes a tap winding
  • reference marks T 1 , T 2 , T 3 ,... T N denote taps provided on the tap winding 2
  • reference numeral 4 denotes a tap selector (or a selector switch) having fixed contacts P 1 , P 2 , P 3 ,... P N each connected to the corresponding taps T 1 to T N .
  • a tap selector or a selector switch
  • a diverter switch is used together, as commonly well-known. It's denotation is however intentionally omitted in the FIG. to avoid complicating explanation.
  • the tap selector and the selector switch are hereinafter generically called "tap selector”.
  • the tap selector 4 has fixed contacts P 1 to P N arranged, for example, in uniform intervals on a circumference of a circle and has a movable contact 41 movable on the circumference of the circle.
  • the tap selector 4 is an ordinary rotary type tap selector. As shown in FIG.1B, by rotating the movable contact 41, one of the fixed contacts P I to P N is selected in such an order as contacts P 1 , P 2 , P 3 .... P N . By further rotating the movable contact 41, one of the fixed contacts P 1 to P N is again selected in the order of contacts P 1 , P 2 , P 3 ... P N . By a reverse rotation of the movable contact 41, one of the fixed contacts P N to P 1 is selected in such order as contacts P N, P N-1 , P N-2 .... P 1 . In this conventional on-load tap changing transformer, N tap positions are produced.
  • FIG.2A shows other prior art on-load tap changing transformer.
  • Reference numeral 5 denotes an ordinary pre-selecting switch.
  • the pre-selecting switch 5 is used as polarity switch.
  • FIG.2B by rotating the movable contact 41, one of the fixed contacts P 1 to P N is selected in such order as contacts P 1 , P 2 , P 3 .... P N .
  • the pre-selecting switch 5 is changed to a tap designated by (-) in FIG.2A.
  • one of the fixed contacts P 1 to P N is again selected in the order of contacts P 1 , P 2 , P3.... P N .
  • one of the fixed contacts P N to P 1 is selected in such order as contacts P N , P N-1 , P N - 2 .... P 1 .
  • 2N-1 tap positions are produced.
  • FIG.3A shows still other prior art on-load tap changing transformer.
  • Reference numeral 3 denotes a coarse tap winding.
  • the pre-selecting switch 5 is used as coars step switch.
  • FIG.3B by rotating the movable contact 41, one of the fixed contacts P 1 to P N is selected in such order as contacts P ] , P 2 , P 3 .... P N ⁇
  • the pre-selecting switch 5 is changed to a tap designated by (-).
  • one of the fixed contacts P 1 to P N is again selected in the order of contacts P 1 , P 2 , P 3 .... P N .
  • An on-load tap changing transformer comprises:
  • Reference numeral 1 denotes a main winding of transformer
  • reference numeral 11 denotes a tap winding having taps T 1 , T 2 , T 3 ... T N , T N+1 , standard taps T 1 , T 2 , T 3 ... T N
  • reference numeral 4 denotes a tap selector (or a selector switch) having fixed contacts P 1 , P 2 , P 3 ... P N each connected to the corresponding taps T 1 to T N
  • reference numeral 5 denotes a pre-selecting switch.
  • One of fixed contacting points of the pre-selecting switch (point designated by (-) in FIG.4A) is connected to the tap T N+1
  • another fixed contact point of the pre-selecting switch (point designated by (+) in FIG.4A) is connected to the tap T 1
  • a movable contacting point 0 is connected to the fixed contact P 1 .
  • the pre-selecting switch 5 selects the point designated by (+), and the tap selector 4 selects the fixed contact P ] .
  • the tap selector 4 selects the fixed contact P ] .
  • FIG. 4D by rotating the movable contact 41, one of the fixed contacts P 1 to P N is selected in such order as contacts P ] , P 2 , P 3 .... P N (hereinafter referred to as standard connecting operation).
  • the state of selecting the contact P N is shown in FIG.4B.
  • the pre-selecting switch 5 is selected to the point designated by (-) (hereinafter referred to as additional connecting operation). Then the fixed contact P 1 is selected, as shown in FIG.4C. Thus, the fixed contact P 1 is connected to the ta p T N+1 .
  • the N+1 tap positions can be selected in case that N fixed contacts are provided in a row of taps for the standard operation.
  • FIG.5A shows another embodiment of the on-load tap changing transformer embodying the present invention.
  • the tap winding 12 has the taps T 1 , T 2 , T 3 ... T N+2 , standard taps T 1 , T 2 , T 3 ... T N and additional taps T N+1 and T N+2 .
  • Reference numeral 5 denotes a pre-selecting switch having a switch 5a and a switch 5b.
  • the switches 5a and 5b select the point designated by (+), and the tap selector 4 selects the fixed contact P ] .
  • FIG.5B by rotating the movable contact 41, one of the fixed contacts P 1 to P N is selected in order as contacts P ] , P 2 , P 3 .... P N (standard connecting operation).
  • both the switches 5a and 5b are selected to the point designated by (-). Then the fixed contact P 1 is selected. Thus, the fixed contact P 1 is connected to the tap T N+1 .
  • the fixed contact P 2 is selected.
  • the fixed contact P 2 is connected to the ta p T N+2 .
  • the N+2 tap positions can be selected in case that N fixed contacts are provided.
  • the movable contact is successively contacted in such order as contacts P 1, P 2, P 3 .... P N , P 1 , P 2 ;
  • the movable contacts may be successively contacted in such order as contacts P ] , P 2 , P 3 .... P N , P N-1 , P N-2 .... , as shown in FIG.6A.
  • one of fixed contacting points of the switch 5a (point designated by (-)) is connected to the tap T N+1
  • another fixed contacting point of the switch 5a (point designated by (+)) is connected to the tap T N-1 .
  • One of fixed contacting points of the switch 5b (point designated by (-)) is connected to the tap T N+2
  • another fixed contacting point of the switch 5a (point designated by (+)) is connected to the tap T N-2 .
  • one of the fixed contacts P l to P N is selected in such order as contacts P 1 , P 2 , P 3 .... P N (the standard connecting operation).
  • both the switches 5a and 5b are selected to the point designated by (-). Then the fixed contact P N-1 is selected. Thus, the fixed contact P N-1 is connected to the tap T N +1.
  • the fixed contact P N - 2 is selected.
  • the fixed contact P N - 2 is connected to the tap T N+2 .
  • the tap changer having fixed contacts P 1 to P N arranged in a line and endlessly and successively changing the fixed contacts may be used.
  • N+M tap positions can be obtained.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
  • Protection Of Transformers (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP86111362A 1985-08-22 1986-08-18 Unter Last umschaltbarer Stufentransformator Expired - Lifetime EP0216125B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111362T ATE64037T1 (de) 1985-08-22 1986-08-18 Unter last umschaltbarer stufentransformator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP183030/85 1985-08-22
JP60183030A JPS6245011A (ja) 1985-08-22 1985-08-22 負荷時タツプ切換変圧器

Publications (2)

Publication Number Publication Date
EP0216125A1 true EP0216125A1 (de) 1987-04-01
EP0216125B1 EP0216125B1 (de) 1991-05-29

Family

ID=16128507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111362A Expired - Lifetime EP0216125B1 (de) 1985-08-22 1986-08-18 Unter Last umschaltbarer Stufentransformator

Country Status (4)

Country Link
EP (1) EP0216125B1 (de)
JP (1) JPS6245011A (de)
AT (1) ATE64037T1 (de)
DE (1) DE3679488D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0741351B2 (ja) * 1989-08-21 1995-05-10 豊田合成株式会社 鍛造用パンチ
RU2345437C2 (ru) * 2004-06-30 2009-01-27 Абб Рисерч Лтд. Переключатель шунтирующего сопротивления, способ управления таким переключателем и использование такого переключателя

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902656C (de) * 1943-12-12 1954-01-25 Koch & Sterzel Ag Regeleinrichtung fuer Stufentransformatoren
US3535617A (en) * 1968-02-02 1970-10-20 Lincoln Electric Co Power source including alternating current transformer having output voltage adjustable in small increments
JPS5612716A (en) * 1979-07-12 1981-02-07 Fuji Electric Co Ltd Transformer with tap changing means at loading
JPS5935409A (ja) * 1982-08-23 1984-02-27 Meidensha Electric Mfg Co Ltd 負荷時タツプ切換変圧器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902656C (de) * 1943-12-12 1954-01-25 Koch & Sterzel Ag Regeleinrichtung fuer Stufentransformatoren
US3535617A (en) * 1968-02-02 1970-10-20 Lincoln Electric Co Power source including alternating current transformer having output voltage adjustable in small increments
JPS5612716A (en) * 1979-07-12 1981-02-07 Fuji Electric Co Ltd Transformer with tap changing means at loading
JPS5935409A (ja) * 1982-08-23 1984-02-27 Meidensha Electric Mfg Co Ltd 負荷時タツプ切換変圧器

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 123 (E-249)[1560], 8th June 1984; & JP-A-59 035 409 (MEIDENSHA K.K.) 27-02-1984 *
PATENT ABSTRACTS OF JAPAN; vol. 5, no. 63, (E-54)[735], 28th April 1981; & JP-A-56 012 716 (07-02-1981) *
SIEMENS REVIEW, vol. 43, no. 7, 1976, pages 271-279; R. BREHLER: "Arc furnace transformers with furnace control breaker in the intermediate circuit" *

Also Published As

Publication number Publication date
DE3679488D1 (de) 1991-07-04
ATE64037T1 (de) 1991-06-15
EP0216125B1 (de) 1991-05-29
JPH058845B2 (de) 1993-02-03
JPS6245011A (ja) 1987-02-27

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