EP0168176B1 - Tap changer - Google Patents

Tap changer Download PDF

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Publication number
EP0168176B1
EP0168176B1 EP85304140A EP85304140A EP0168176B1 EP 0168176 B1 EP0168176 B1 EP 0168176B1 EP 85304140 A EP85304140 A EP 85304140A EP 85304140 A EP85304140 A EP 85304140A EP 0168176 B1 EP0168176 B1 EP 0168176B1
Authority
EP
European Patent Office
Prior art keywords
tap
change
over switch
electrically connected
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.)
Expired
Application number
EP85304140A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0168176A1 (en
Inventor
Katsuaki Ito
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 AT85304140T priority Critical patent/ATE38107T1/de
Publication of EP0168176A1 publication Critical patent/EP0168176A1/en
Application granted granted Critical
Publication of EP0168176B1 publication Critical patent/EP0168176B1/en
Expired 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
    • 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

  • the present invention relates to a tap changer used in a transformer for changing a voltage by stages by a predetermined number of taps.
  • a terminal or a neutral point of a transformer is electrically connected to one end of a main winding.
  • the other end of the main winding is electrically connected to one end of a first tap winding for the rough adjustment of voltage and to a stationary contact of a first change-over switch.
  • the first change-over switch has another stationary contact connected to the other end of the first tap winding, and a current collecting contact which is electrically connected to one end of a second tap winding for the rough adjustment of voltage and to a stationary contact of a second change-over switch.
  • the second change-over switch has another stationary contact connected to the other end of the second tap winding, and a current collecting contact connected to a tap winding device for the fine adjustment of voltage.
  • the fine adjustment tap winding device comprises a fine adjustment tap winding with a predetermined number of taps and an auxiliary tap for changing voltage.
  • An auxiliary change-over switch has one stationary contact connected to the other end of the first tap winding, the other stationary contact connected to the other end of the second tap winding, and a current collecting contact connected to the fine adjustment tap winding device.
  • Each of the first, second, and auxiliary change-over switches has a movable switching member for electrically connecting the current collecting contact to either of the stationary contacts.
  • the stationary and current collecting contacts of each change-over switch are disposed between the movable switching members thereof.
  • An output terminal is connected through a diverter switch to either of two movable conductors which can be electrically connected to the fine adjustment tap winding device.
  • the voltage between the neutral point and the output terminal is changed by stages by the switching operations of the first, second, and auxiliary change-over switches and the switching operations of the taps of the fine adjustment tap winding device.
  • an object of the present invention is to provide a tap changer in which the number of rough adjustment tap windings is increased by only increasing the number of stationary contacts of a change-over switch and an auxiliary change-over switch, and in which the wearing of the contacts is preferably reduced, thereby obtaining a compact and reii- able tap changer.
  • the present invention aims to improve a tap changer used with a transformer including a main winding, at least two tap windings for the rough adjustment of voltage, one tap winding having a predetermined number of taps for the fine adjustment of voltage, and first and second change-over switch devices each having stationary contacts and one current collecting contact, in which the rough-adjustment windings are electrically connected in series to the main winding and each other, the stationary contacts of each change-over switch device are electrically connected to the.
  • the current collecting contact of the first change-over switch is electrically connected to an end of the fine adjustment tap winding
  • the current collecting contact of the second change-over switch is electrically connected to a stationary contact installed in the tap-selector for the auxiliary tap.
  • a transformer with which a tap changer of the present invention can be used comprises a main winding 51 electrically connected at one end thereof to a terminal or a neutral point 50 of the transformer, and first and second tap windings 54 and 58, respectively, which are electrically connected in series to each other without change-over switches and which are used to roughly adjust the voltage of the transformer.
  • the connecting portion between the main winding 51 and the first tap winding 54 is electrically connected to a stationary contact 11 of a first change-over switch 70 and a stationary contact 15 of a second or auxiliary change-over switch 71.
  • the connecting portion between the first tap winding 54 and the second tap winding 58 is electrically connected to a stationary contact 12 of the first change-over switch 70 and a stationary contact 16 of the auxiliary change-over switch 71.
  • the end of the second tap winding 58 which is not electrically connected to the first tap winding 54, is electrically connected to a stationary contact 13 of the first change-over switch 70 and a stationary contact 17 of the auxiliary change-over switch 71.
  • a tap changer used in the transformer comprises the first and second change-over switches 70 and 71, respectively.
  • a current collecting contact 14 of the first change-over switch 70 can be electrically connected to one of the stationary contacts 11 to 13 thereof by a movable rotary conductor A, and is electrically connected to one end 61 of a tap winding 62 comprising a predetermined number of taps 101 to 109 for the fine adjustment of voltage.
  • a current collecting contact 18 of the auxiliary change-over switch 71 can be electrically connected to one of the stationary contacts 15 to 17 thereof by a movable rotary conductor B, and is electrically connected to an auxiliary tap K which can be electrically connected to a diverter switch 65 by a movable conductor of tap selector 64b.
  • the fine adjustment tap winding 62 and the auxiliary tap K constitute a tap winding device for the fine adjustment of voltage of the present invention.
  • the diverter switch 65 has a movable switching member for electrically connecting an output terminal 66 to either of the movable conductors of tap selector 64a and 64b.
  • Each of the movable conductors of tap selector 64a and 64b can electrically come in contact with one of the taps of the fine adjustment tap winding 62.
  • Fig. 2 shows an arrangement in which the contacts of the first change-over switch 70 and the auxiliary change-over switch 71 disposed on an inner circumferential wall are seen from the inside thereof.
  • Each of the movable rotary conductors A and B can rotate from one stationary contact to another stationary contact in order to electrically connect each of the current collecting contacts 14 and 18 to one of the stationary contacts.
  • Fig. 3 shows in cross section the structure of the contacts of each of the change-over switches 70 and 71.
  • the movable conductor of tap selector 64b is electrically connected to the auxiliary tap K, and the output terminal 66 is electrically connected to the movable conductor of tap selector 64b by the switching member of the diverter switch 65.
  • the movable conductor of tap selector 64a electrically contacts a tap 101. This state corresponds to position No. 10 in Fig. 9, and the transformer is operated at the position of the auxiliary tap K.
  • Fig. 9 shows the relation between the taps of the tap selector, the change-over switch 70, and the auxiliary change-over switch 71 in Fig. 1 through which the electric current passes, further clarifying the successive operations mentioned above.
  • Figs. 4 and 5 show another embodiment of a tap changer of the present invention used in a transformer in which one further tap winding for the rough adjustment of voltage is added to the transformer in Fig. 1.
  • a third rough adjustment tap winding 68 is connected in series to a second tap winding 58, and the end of the third tap winding 68, which is not connected to the second tap winding 58, is electrically connected to a stationary contact 19 of a first change-over switch 70' and a stationary contact 10 of.
  • an auxiliary change-over switch 71' The structure of the transformer having the tap changer in Figs. 4 and 5 is otherwise similar to the structure in Figs. 1 and 2. It will be understood that according to the second embodiment in Figs. 4 and 5, an effect similar to the effect in Figs. 1 and 2 is obtained.
  • Fig. 6 shows a tap changer for three phases comprising three change-over switches each of which is similar to each change-over switch in Fig. 1.
  • Each of three circumferentially divided members on a circumferential wall defines a current collecting contact 14 or 18 of each of the three change-over switches 70 or 71, respectively.
  • Stationary contacts of each change-over switch 70 or 71 are disposed on the same circumference as the circumference of each current collecting contact 14 or 18.
  • each current collecting contact 14 or 18 can be electrically connected to each stationary contact by a movable rotary conductor A or B, respectively. It will be understood that the effect of the present invention can obtained in the tap changer for three phases stated above.
  • the current collecting contacts 14 and 18 as well as the stationary contacts can be disposed on an inner circumferential wall, and it is therefore easy to electrically insulate the three change-over switches from each other.
  • the electric potentials of the stationary contacts of the first change-over switch are respectively the same as the electric potentials of the stationary contacts of the auxiliary change-over switch. Therefore, as seen from Figs. 7 and 8, the stationary contacts 11, 12, and 13 of the first change-over switch 70 can be integrally formed with the stationary contacts 15, 16, and 17, respectively of the auxiliary change-over switch 71.
  • the following effects can be obtained by changing the structure of connections between a main winding, at least two rough adjustment tap windings, and first and second change-over switches, and the structure of contacts between the change-over switches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Control Of Electrical Variables (AREA)
  • Protection Of Transformers (AREA)
  • Valve Device For Special Equipments (AREA)
  • Amplifiers (AREA)
EP85304140A 1984-06-11 1985-06-11 Tap changer Expired EP0168176B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85304140T ATE38107T1 (de) 1984-06-11 1985-06-11 Stufenschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP118261/84 1984-06-11
JP59118261A JPH0646612B2 (ja) 1984-06-11 1984-06-11 タツプ切換器の転換器

Publications (2)

Publication Number Publication Date
EP0168176A1 EP0168176A1 (en) 1986-01-15
EP0168176B1 true EP0168176B1 (en) 1988-10-19

Family

ID=14732245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85304140A Expired EP0168176B1 (en) 1984-06-11 1985-06-11 Tap changer

Country Status (4)

Country Link
EP (1) EP0168176B1 (ja)
JP (1) JPH0646612B2 (ja)
AT (1) ATE38107T1 (ja)
DE (1) DE3565736D1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437143C1 (de) * 1994-10-18 1995-12-21 Reinhausen Maschf Scheubeck Stufenwähler mit Mehrfach-Grobwähler für einen Stufenschalter
IT1304931B1 (it) * 1998-12-04 2001-04-05 Camillo Sansone Apparecchiatura per il controllo e la gestione di utilizzatorialimentati ad energia elettrica.
CN101692392B (zh) * 2009-09-08 2011-05-11 武汉泰普变压器开关有限公司 一种变压器用无励磁笼形正反调压分接开关
DE102015106178A1 (de) * 2015-04-22 2016-10-27 Maschinenfabrik Reinhausen Gmbh Laststufenschalter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB886432A (en) * 1959-03-10 1962-01-10 Gen Electric Co Ltd Improvements in and relating to on-load transformer tap-changing arrangements
DE1254755B (de) * 1964-11-14 1967-11-23 Reinhausen Maschf Scheubeck Dauerhauptkontakt fuer Lastumschalter von Stufentransformatoren
NL128567C (ja) * 1966-03-31
US3875354A (en) * 1974-02-26 1975-04-01 Allis Chalmers Load tap changing mechanism having constant duty cycle
JPS5224209A (en) * 1975-08-19 1977-02-23 Harima Refractories Co Ltd Method of measuring workability of vibration molding materials
DE2913271C2 (de) * 1979-04-03 1982-11-18 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Dreiphasiger Lastwähler für Stufentransformatoren
DE2936519C2 (de) * 1979-09-10 1983-11-24 Transformatoren Union Ag, 7000 Stuttgart Kontaktanordnung bei einem Stufenwähler für einen Transformator
DE3207894C2 (de) * 1982-03-05 1986-03-13 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Kontaktanordnung für Stufenschalter von Stufentransformatoren
JPS60124810A (ja) * 1983-12-08 1985-07-03 Mitsubishi Electric Corp 負荷タップ選択器

Also Published As

Publication number Publication date
DE3565736D1 (en) 1988-11-24
EP0168176A1 (en) 1986-01-15
ATE38107T1 (de) 1988-11-15
JPS60262409A (ja) 1985-12-25
JPH0646612B2 (ja) 1994-06-15

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