GB437223A - Improvements in and relating to apparatus for detecting faults in transformers - Google Patents

Improvements in and relating to apparatus for detecting faults in transformers

Info

Publication number
GB437223A
GB437223A GB31236/34A GB3123634A GB437223A GB 437223 A GB437223 A GB 437223A GB 31236/34 A GB31236/34 A GB 31236/34A GB 3123634 A GB3123634 A GB 3123634A GB 437223 A GB437223 A GB 437223A
Authority
GB
United Kingdom
Prior art keywords
coils
transformers
class
series
length
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
GB31236/34A
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 GB437223A publication Critical patent/GB437223A/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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

437,223. Transformers. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. Oct. 31, 1934, No. 31236. Convention date, Nov. 1, 1933. [Class 38 (ii)] Faults in transformer insulation are detected by providing coils 14, 15 located between the magnetic casing and windings, the detector 16 responding to unbalance in leakage flux. One of the coils 14, 15 may be tapped in order to produce equality of induced voltage in both coils. In modifications, a single coil 14 extends for the length of the main windings, or a number of series-connected coils may be disposed throughout the length of the main windings, the induced voltages being opposed in all of the above arrangements. In a further modification, a variable resistor is connected in series with the coils 14, 15, the induced voltages being additive and the instrument 16 connected to the resistor tapping at an equipotential point. Reference has been directed by the Comptroller to Specifications 296,446, 297,473, and 336,147, [all in Class 38 (ii)].
GB31236/34A 1933-11-01 1934-10-31 Improvements in and relating to apparatus for detecting faults in transformers Expired GB437223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US437223XA 1933-11-01 1933-11-01

Publications (1)

Publication Number Publication Date
GB437223A true GB437223A (en) 1935-10-25

Family

ID=21928557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31236/34A Expired GB437223A (en) 1933-11-01 1934-10-31 Improvements in and relating to apparatus for detecting faults in transformers

Country Status (1)

Country Link
GB (1) GB437223A (en)

Similar Documents

Publication Publication Date Title
GB437223A (en) Improvements in and relating to apparatus for detecting faults in transformers
GB912721A (en) Improvements in or relating to current-measuring instruments
GB208365A (en) Improvements in or relating to electric meters
GB336048A (en) Improvements relating to electrical transformers
GB431017A (en) Improvements in and relating to voltage indicating means for transformers
GB411872A (en) Improvements relating to a.c. electricity meters
GB531127A (en) Improvements in and relating to electric current measuring devices
GB356690A (en) Improvements in and relating to the testing of electrical and/or magnetic characteristics of metal sheets
GB394640A (en) Improvements in or relating to electric condensers
GB392942A (en) Improvements in or relating to earthing reactances
GB543748A (en) Improvements in or relating to a method of and apparatus for comparing alternating voltages
GB394566A (en) Improvements in and relating to variable reactance devices
GB529829A (en) Improvements relating to transformers for use with electrical energy meters
GB683621A (en) Improvements in or relating to electric transformers
GB503972A (en) Improvements in and relating to the protection of electric cables
GB386521A (en) Improvements in methods and devices for electrical integration
GB514890A (en) Improvements in and relating to electric transformer
GB406636A (en) Improvements in and relating to the regulating of excitation of dynamo electric machines
GB203322A (en) Improvements in or relating to electric meters
GB576405A (en) Improvements in apparatus for measuring electrical resistance
GB399058A (en) Improvements in and relating to choke coils for electric distribution systems
GB740467A (en) Improvements in current transformers
AU101470B2 (en) An improved current core witha magnetic shunt for induction measuring apparatus
GB439659A (en) Improvements in electric measuring instruments
GB559654A (en) Arrangements for indicating a characteristic of an alternating current electric supply system