GB1399528A - Electrical onload tap changing systems - Google Patents

Electrical onload tap changing systems

Info

Publication number
GB1399528A
GB1399528A GB2881472A GB2881472A GB1399528A GB 1399528 A GB1399528 A GB 1399528A GB 2881472 A GB2881472 A GB 2881472A GB 2881472 A GB2881472 A GB 2881472A GB 1399528 A GB1399528 A GB 1399528A
Authority
GB
United Kingdom
Prior art keywords
contacts
current
contact
tapping
load
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
GB2881472A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2881472A priority Critical patent/GB1399528A/en
Publication of GB1399528A publication Critical patent/GB1399528A/en
Expired 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

1399528 Transformer tap-changing arrangements A I KRASOV 20 June 1972 28814/72 Heading HIT An on-load tap changer comprises at least four switching members, load switching means 7, a selector switch 34 having at least two movable contacts 6 and 8, and a resistor 5 for limiting the current appearing at the switchover. In the static state the load current I h flows through main contacts 1 and 8 while auxiliary contacts 2, 3, 4 and 6 have no current flowing through them. To change from tapping 9 to tapping 28 the following sequence occurs. Shaft 11 is rotated by actuator 10 to close contacts 3 and 2 and 19 and 20. In this position all contacts are closed and current can also flow through thyristors 15 and 16. Further rotation breaks contacts 1 and 4, and the load current is then carried by the thyristors until contacts 19 and 20 open and turn them off. Current must now flow through contact 3, resistor 5 and contact 6, and no current flows through contact 8 which may be moved to the tapping 28 by means of shaft 26 turned by Geneva cross 24. This shifting does not turn the contact 8, connected to shaft 27, because of the coupling 23 which ensures that the turning of Geneva cross 25 lays behind that of cross 24. Contacts 1 and 4 and 19 and 20 now make and the load current flows again in contact 8 and through tapping 28. There is current flowing between tappings 28 and 9 due to the voltage existing across this stage. This current is limited to not more than I h by the value of resistor 5. Contacts 2 and 3 break and the current passes through thyristor 15 and 16 until contacts 19 and 20 break. Contact 6 is now dead and is moved to tapping 28 by Geneva cross 25 to complete the switching operation.
GB2881472A 1972-06-20 1972-06-20 Electrical onload tap changing systems Expired GB1399528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2881472A GB1399528A (en) 1972-06-20 1972-06-20 Electrical onload tap changing systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2881472A GB1399528A (en) 1972-06-20 1972-06-20 Electrical onload tap changing systems

Publications (1)

Publication Number Publication Date
GB1399528A true GB1399528A (en) 1975-07-02

Family

ID=10281606

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2881472A Expired GB1399528A (en) 1972-06-20 1972-06-20 Electrical onload tap changing systems

Country Status (1)

Country Link
GB (1) GB1399528A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006784A (en) * 1987-06-25 1991-04-09 Elin-Union Thyristor on-load change-over switch
DE19518272C1 (en) * 1995-05-18 1996-10-24 Reinhausen Maschf Scheubeck Tap-switch for transformers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006784A (en) * 1987-06-25 1991-04-09 Elin-Union Thyristor on-load change-over switch
DE19518272C1 (en) * 1995-05-18 1996-10-24 Reinhausen Maschf Scheubeck Tap-switch for transformers
US5773970A (en) * 1995-05-18 1998-06-30 Maschinenfabrik Reinhausen Gmbh Tap changer with tickler coil for arcless tap changing

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees