EP0216125B1 - Unter Last umschaltbarer Stufentransformator - Google Patents

Unter Last umschaltbarer Stufentransformator Download PDF

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Publication number
EP0216125B1
EP0216125B1 EP86111362A EP86111362A EP0216125B1 EP 0216125 B1 EP0216125 B1 EP 0216125B1 EP 86111362 A EP86111362 A EP 86111362A EP 86111362 A EP86111362 A EP 86111362A EP 0216125 B1 EP0216125 B1 EP 0216125B1
Authority
EP
European Patent Office
Prior art keywords
fixed
tap
contacts
taps
contact
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
EP86111362A
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English (en)
French (fr)
Other versions
EP0216125A1 (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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    • 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.
  • an on-load tap changing transformer which comprises a main winding, a tap winding having N standard taps, fixed contacts, movable contacts and selecting switches used as polarity switches.
  • FIG.1A shows an on-load tap changing transformer of the prior art.
  • Reference numeral 1 denotes a main winding of the transformer
  • reference numeral 2 denotes a tap winding
  • reference marks T1, T2, T3 ,... T N denote taps provided on the tap winding 2
  • reference numeral 4 denotes a tap selector (or a selector switch) having fixed contacts P1, P2, P3 ,... P N , each connected to the corresponding taps T1 to T N .
  • a tap selector or a selector switch
  • a diverter switch is used together therewith, as well-known. Its 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 P1 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 P1 to P N is selected in such an order as contacts P1, P2, P3 .... P N . By further rotating the movable contact 41, one of the fixed contacts P1 to P N is again selected in the order of contacts P1 , P2 , P3 ... P N . By a reverse rotation of the movable contact 41, one of the fixed contacts P N to P1 is selected in such order as contacts P N , P N-1 , P N-2 .... P1. In this conventional on-load tap changing transformer, N tap positions are produced.
  • FIG. 2A shows another 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 P1 to P N is selected in such order as contacts P1, P2, P3 .... P N .
  • the pre-selecting switch 5 is changed to a tap designated by (-) in FIG.2A.
  • one of the fixed contacts P1 to P N is again selected in the order of contacts P1, P2, P3.... P N .
  • one of the fixed contacts P N to P1 is selected in such order as contacts P N , P N-1 , P N-2 .... P1.
  • 2N-1 tap positions are produced.
  • FIG.3A shows still another prior art on-load tap changing transformer.
  • Reference numeral 3 denotes a coarse tap winding.
  • the pre-selecting switch 5 is used as coarse step switch.
  • FIG.3B by rotating the movable contact 41, one of the fixed contacts P1 to P N is selected in such order as contacts P1, P2, P3 .... P N .
  • the pre-selecting switch 5 is changed to a tap designated by (-).
  • one of the fixed contacts P1 to P N is again selected in the order of the contacts P1, P2, P3 .... P N .
  • one of the fixed contacts P N to P1 is selected in such order as contacts P N , P N-1 , P N-2 .... P1.
  • 2N-1 tap positions are produced.
  • an on-load tap changing transformer comprising N fixed contacts No. 1 to No. N; a movable contact which contacts one fixed contact at a time; a main winding; a tap winding having N standard taps No. 1 to No. N, each of the respective standard taps being during a standard connecting operation of the movable contact in connection with its associated fixed contact; and preselecting switch means.
  • the invention is constituted by the fact that the on-load tap changing transformer furthermore comprises M additional taps No. N+1 to No. N+M, each respective additional tap being associated with one of said fixed contacts No. 1 to No. N; and that the pre-selecting switch means is adapted to provide either said connecting of the standard taps No. 1 to N during the standard connecting operation of the movable contact or the connection of at least one of the additional taps No. N+1 to No. N+M to its/their associated fixed contact(/s) during an additional connecting operation of the movable contact.
  • FIG.1A shows a connection of a prior art on-load tap changing transformer.
  • FIG.1B is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.1A.
  • FIG.2A shows a connection of another prior art on-load tap changing transformer.
  • FIG.2B is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.2A.
  • FIG.3A shows a connection of still another prior art on-load tap changing transformer.
  • FIG.3B is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.3A.
  • FIG.4A shows a preferred embodiment of an on-load tap changing transformer embodying the present invention in selecting a tap position No. 1.
  • FIG.4B shows the preferred embodiment of the on-load tap changing transformer embodying the present invention in selecting a tap position No. N.
  • FIG.4C shows the preferred embodiment of the on-load tap changing transformer embodying the present invention in selecting a tap position No. N+1.
  • FIG.4D is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.4A, 4B and 4C.
  • FIG.5A shows another embodiment of the on-load tap changing transformer embodying the present invention.
  • FIG.5B is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.5A.
  • FIG.6A shows still another embodiment of the on-load tap changing transformer embodying the present invention.
  • FIG.6B is a diagram for showing connecting condition of the on-load tap changing transformer of FIG.6A.
  • Reference numeral 1 denotes a main winding of transformer
  • reference numeral 11 denotes a tap winding having taps T1, T2, T3 ... T N and an additional tap T N+1
  • reference numeral 4 denotes a tap selector (or a selector switch) having fixed contacts P1, P2, P3 ... P N , each connected to the corresponding taps T1 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 T1, and a movable contacting point 0 is connected to the fixed contact P1.
  • the pre-selecting switch 5 selects the point designated by (+), and the tap selector 4 selects the fixed contact P1.
  • the tap selector 4 selects the fixed contact P1.
  • Fig.4D by rotating the movable contact 41, one of the fixed contacts P1 to P N is selected in such order as contacts P1, P2, P3 .... 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 P1 is selected, as shown in FIG.4C. Thus, the fixed contact P1 is connected to the tap 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 T1, T2, T3 ... T N+2 , standard taps T1, T2, T3 ... 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 P1.
  • FIG.5B by rotating the movable contact 41, one of the fixed contacts P1 to P N is selected in the order as contacts P1, P2, P3 .... P N (standard connecting operation).
  • both the switches 5a and 5b are connected to the point designated by (-). Then the fixed contact P1 is selected. Thus, the fixed contact P1 is connected to the tap T N+1 .
  • the fixed contact P2 is selected.
  • the fixed contact P2 is connected to the tap 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 P1, P2, P3 .... P N , P1, P2 ....
  • the movable contacts may be successively contacted in such order as contacts P1, P2, P3 .... P N , P N-1 , P N-2 .... , as shown in FIG.6A.
  • one of the 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 the 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 P1 to P N is selected in such order as contacts P1, P2, P3 .... P N (the standard connecting operation).
  • both the switches 5a and 5b are connected 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 selector having fixed contacts P1 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)

Claims (5)

  1. Ein unter Last umschaltbarer Stufentransformator mit:
    N festen Kontakten Nr. 1, Nr. 2, Nr. 3 ... Nr. N (P₁ bis PN),
    einem beweglichen Kontakt (41), welcher einen festen Kontakt (P₁ bis PN) zur Zeit kontaktiert,
    einer Hauptwicklung (1),
    einer Anzapfwicklung (11, 12), welche N Standardanzapfungen Nr. 1, Nr. 2, Nr. 3 ... Nr. N (T₁ bis TN) aufweist, wobei jede der jeweiligen Standardanzapfungen während eines Standardverbindungsbetriebs des beweglichen Kontakts (41) mit ihrem zugeordneten festen Kontakt (P₁-PN) verbunden ist, und
    einer Vorauswahlschaltvorrichtung (5), dadurch gekennzeichnet, daß
    M zusätzliche Anzapfungen Nr. N+1, Nr. N+2, Nr. N+3 ... Nr. N+M (TN+1 bis TN+M) vorgesehen sind, wobei jede zusätzliche Anzapfung jeweils einem der festen Kontakte Nr. 1, Nr. 2, Nr. 3 ... Nr. N (P₁ bis PN) zugeordnet ist,
    die Vorauswahlschaltvorrichtung (5) angepaßt ist, um entweder die Verbindung der Standardanzapfungen Nr. 1 bis N (T₁ bis TN) während des Standardverbindungsbetriebs des beweglichen Kontakts (41) oder die Verbindung von wenigstens einem der zusätzlichen Anzapfungen Nr. N+1, Nr. N+2, Nr. N+3 ... Nr. N+M (TN+1 bis TN+M) zu seinem/ihren zugeordneten festen Kontakt/(en) (P₁ bis PN) während eines zusätzlichen Verbindungsbetriebs des beweglichen Kontakts (41) bereitzustellen.
  2. Der unter Last umschaltbare Stufentransformator nach Anspruch 1, worin die Vorauswahlschaltvorrichtung (5) wenigstens einen Schalter besitzt, welcher zwei feste Verbindungspunkte und einen beweglichen Verbindungspunkt aufweist, wobei einer der festen Verbindungspunkte mit einer der zugeordneten Standardanzapfungen Nr. 1, Nr.2, Nr. 3 ... Nr. N (T₁ bis TN) verbunden ist, der andere feste Verbindungspunkt mit einem der zugeordneten zusätzlichen Anzapfungen Nr. N+1, Nr. N+2 ... Nr. N+M (TN+1 bis TN+M) und der bewegliche Verbindungspunkt mit einem der zugeordneten festen Kontakte Nr. 1, Nr. 2, Nr. 3 ... Nr. N (P₁ bis PN) verbunden ist.
  3. Der unter Last umschaltbare Stufentransformator nach Anspruch 1, worin die Vorauswahlschaltvorrichtung (5) wenigstens einen Schalter besitzt, welcher zwei feste Verbindungspunkte und einen beweglichen Verbindungspunkt aufweist, wobei einer der festen Verbindungspunkte mit einer der zugeordneten Standardanzapfungen Nr. 1, Nr.2, Nr. 3 ... Nr. N-1 (T₁ bis TN-1) verbunden ist, der andere feste Verbindungspunkt mit einem der zugeordneten zusätzlichen Anzapfungen Nr. N+1, Nr. N+2 ... Nr. N+M (TN+1 bis TN+M) und der bewegliche Verbindungspunkt mit einem der zugeordneten festen Kontakte Nr. 1, Nr. 2, Nr. 3 ... Nr. N (P₁ bis PN) verbunden ist.
  4. Der unter Last umschaltbare Stufentransformator nach Anspruch 1 oder 3, worin der Vorauswahlschalter (5) umgeschaltet wird, wenn die Position des beweglichen Kontakts (41) von dem festen Kontakt Nr. N (PN) zu dem festen Kontakt Nr. 1 (P₁) umgeschaltet wird, und wenn die Position des beweglichen Kontakts (41) von dem festen Kontakt Nr. N (PN) zu dem festen Kontakt Nr. N-1 (PN-1) umgeschaltet wird.
  5. Der unter Last umschaltbare Stufentransformator nach Anspruch 2 oder 3, worin der Vorauswahlschalter (5) umgeschaltet wird, wenn die Position des beweglichen Kontakts (41) von dem festen Kontakt Nr. N (PN) zu dem festen Kontakt Nr. N-1 (PN-1) umgeschaltet wird.
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 EP0216125A1 (de) 1987-04-01
EP0216125B1 true EP0216125B1 (de) 1991-05-29

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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

Family Cites Families (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 (2)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 123 (E-249)[1560], 8th June 1984; & JP-A-59 35409 *
PATENTS ABSTRACTS OF JAPAN; vol. 5, no. 63, (E-54)[735], 28th April 1981; & JP-A-56 12716 07-02-1981 *

Also Published As

Publication number Publication date
DE3679488D1 (de) 1991-07-04
ATE64037T1 (de) 1991-06-15
JPH058845B2 (de) 1993-02-03
EP0216125A1 (de) 1987-04-01
JPS6245011A (ja) 1987-02-27

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