GR1008066B - An imroved power transformer with vacuum type on load tap changer (oltc) operable at an oil-head exceeding ten meters - Google Patents

An imroved power transformer with vacuum type on load tap changer (oltc) operable at an oil-head exceeding ten meters

Info

Publication number
GR1008066B
GR1008066B GR20130100026A GR20130100026A GR1008066B GR 1008066 B GR1008066 B GR 1008066B GR 20130100026 A GR20130100026 A GR 20130100026A GR 20130100026 A GR20130100026 A GR 20130100026A GR 1008066 B GR1008066 B GR 1008066B
Authority
GR
Greece
Prior art keywords
oltc
oil
meters
tap changer
load tap
Prior art date
Application number
GR20130100026A
Other languages
Greek (el)
Other versions
GR20130100026A (en
Inventor
Rajendra Kumar Mohapatra
Original Assignee
Bharat Heavy Electricals Limited,
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 Bharat Heavy Electricals Limited, filed Critical Bharat Heavy Electricals Limited,
Publication of GR20130100026A publication Critical patent/GR20130100026A/en
Publication of GR1008066B publication Critical patent/GR1008066B/en

Links

Classifications

    • 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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices

Landscapes

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

Abstract

The invention relates to an improved power transformer with vacuum type on load tap changer (OLTC) operable at an oil-head exceeding ten meters, comprising a magnetic core, a high-voltage (HV) winding, a set of a low-voltage (LV) winding, a transformer tank, and a vacuum type on load tap changer (OLTC); and a conservator (C) disposed at a height exceeding ten meters above the transformer tank, the transformer tank is configured into two halves, the first half accommodating the magnetic core-coil assembly and the second half housing the vacuum OLTC, the two halves being separated by a steel waif (W) having a plurality of cut-outs, the cut-outs provided with insulated terminal board (TB) with corresponding numbers of terminal bushings (B) allowing connection between the coils and the OLTC, and in that the second half is smaller in size than the first half and provided with an auxiliary, conservator (AC) leading to maintaining of oil-head pressure on the vacuum OLTC is the range of 0.1 kg sqxm which is equivalent to 1 meter oil head.
GR20130100026A 2012-03-22 2013-01-18 An imroved power transformer with vacuum type on load tap changer (oltc) operable at an oil-head exceeding ten meters GR1008066B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN322KO2012 2012-03-22

Publications (2)

Publication Number Publication Date
GR20130100026A GR20130100026A (en) 2013-10-15
GR1008066B true GR1008066B (en) 2013-12-18

Family

ID=48808393

Family Applications (1)

Application Number Title Priority Date Filing Date
GR20130100026A GR1008066B (en) 2012-03-22 2013-01-18 An imroved power transformer with vacuum type on load tap changer (oltc) operable at an oil-head exceeding ten meters

Country Status (1)

Country Link
GR (1) GR1008066B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE412139B (en) * 1978-06-16 1980-02-18 Asea Ab TRANSFORMER WITH WINDING COUPLES
JPS556801A (en) * 1978-06-28 1980-01-18 Hitachi Ltd Oil-filled electrical apparatus
JPH07142267A (en) * 1993-11-17 1995-06-02 Toshiba Corp Transformer provided with on-load tap changer
CN101383222B (en) * 2008-02-26 2010-06-23 上海华明电力设备制造有限公司 Externally hanging combined loaded tap-changer
EP2264729A1 (en) * 2009-06-18 2010-12-22 ABB Technology Ltd Method and device for detecting failure of a vacuum interrupter of an on load tap changer

Also Published As

Publication number Publication date
GR20130100026A (en) 2013-10-15

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Legal Events

Date Code Title Description
PG Patent granted

Effective date: 20140124