GB474209A - Improvements in and relating to electric transformers - Google Patents

Improvements in and relating to electric transformers

Info

Publication number
GB474209A
GB474209A GB9805/37A GB980537A GB474209A GB 474209 A GB474209 A GB 474209A GB 9805/37 A GB9805/37 A GB 9805/37A GB 980537 A GB980537 A GB 980537A GB 474209 A GB474209 A GB 474209A
Authority
GB
United Kingdom
Prior art keywords
winding
auxiliary
cylinder
transformers
april
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
GB9805/37A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB474209A publication Critical patent/GB474209A/en
Expired legal-status Critical Current

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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

474,209. Transformers. BRITISH THOMSON-HOUSTON CO., Ltd. April 6, 1937, No. 9805. Convention date, April 6, 1936. Addition to 470,145. [Class 38 (ii)] Relates to polyphase transformers in which the core structure is arranged so that 5th and 7th harmonic components of magnetomotive force cancel out as described in the parent Specification, and in which a damping winding 7 for 3rd harmonic flux is provided on the yokes excited by an auxiliary winding 8 on the limbs, and consists in making the auxiliary winding in the form of flat strip 8 embedded in an insulating cylinder 15a. The winding may be laid in grooves cut in the cylinder or on a plain cylinder with strips of insulation wound to fill the spaces between the turns. A further insulating cylinder 15b is passed over the winding to form a foundation for the main windings 4a, 4b the mean diameters of which are but slightly increased by the presence of the auxiliary windings. Shortcircuit currents due to earth faults in the auxiliary windings are limited by arranging the winding near the middle of the limb so as to have maximum dispersion and by providing fuses 9 in the connections to the damping winding.
GB9805/37A 1936-04-06 1937-04-06 Improvements in and relating to electric transformers Expired GB474209A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE474209X 1936-04-06

Publications (1)

Publication Number Publication Date
GB474209A true GB474209A (en) 1937-10-27

Family

ID=6541684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9805/37A Expired GB474209A (en) 1936-04-06 1937-04-06 Improvements in and relating to electric transformers

Country Status (1)

Country Link
GB (1) GB474209A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445082A (en) * 1979-09-19 1984-04-24 Hydro Quebec Variable ratio transformer and static balance compensator
US5343080A (en) * 1991-11-15 1994-08-30 Power Distribution, Inc. Harmonic cancellation system
US5434455A (en) * 1991-11-15 1995-07-18 Power Distribution, Inc. Harmonic cancellation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445082A (en) * 1979-09-19 1984-04-24 Hydro Quebec Variable ratio transformer and static balance compensator
US5343080A (en) * 1991-11-15 1994-08-30 Power Distribution, Inc. Harmonic cancellation system
US5434455A (en) * 1991-11-15 1995-07-18 Power Distribution, Inc. Harmonic cancellation system

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