GB978729A - Improvements relating to current transformers - Google Patents

Improvements relating to current transformers

Info

Publication number
GB978729A
GB978729A GB4581262A GB4581262A GB978729A GB 978729 A GB978729 A GB 978729A GB 4581262 A GB4581262 A GB 4581262A GB 4581262 A GB4581262 A GB 4581262A GB 978729 A GB978729 A GB 978729A
Authority
GB
United Kingdom
Prior art keywords
bushing
foils
tank
paper
melinex
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
GB4581262A
Inventor
John Heighes
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB4581262A priority Critical patent/GB978729A/en
Priority to CH1478063A priority patent/CH414842A/en
Publication of GB978729A publication Critical patent/GB978729A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

978,729. Transformers. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 19, 1963 [Dec. 4, 1962], No. 45812/62. Heading H1T. A current transformer (for 400KV working, or more) has a primary conductor 1 surrounded by an insulating bushing 2 and a secondary 3 around the bushing, all enclosed in a conducting sheath 6 connected to the primary. The bushing 2 consists of layers of paper or " Melinex " (Registered Trade Mark), interleaved with metal foils 11, wound around the conductor 1, and in the case of paper layers continuously dried during the winding process. The tank 6 may be filled with oil or SF6 respectively according to whether paper or Melinex is used, or the foils 11 may be cast in a solid resin bushing and the whole space 12 filled with a mass of resin, the tank 6 being formed by a metal coating on this mass. The secondary leads 5 are carried in a tube 4 connected to the earthed plate 9 which supports the porcelain insulator 7, and insulating tubes 13 supporting more stress-controlling metal foils may be connected to cones 14, also carrying foils to increase the oil creep path. The shape of the tank 6 and the secondary windings may be such as to reduce electrical stresses, and the bushing may carry for example 75 foils having a 0.05 inch separation.
GB4581262A 1962-12-04 1962-12-04 Improvements relating to current transformers Expired GB978729A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4581262A GB978729A (en) 1962-12-04 1962-12-04 Improvements relating to current transformers
CH1478063A CH414842A (en) 1962-12-04 1963-12-03 Electric current converter for high voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4581262A GB978729A (en) 1962-12-04 1962-12-04 Improvements relating to current transformers

Publications (1)

Publication Number Publication Date
GB978729A true GB978729A (en) 1964-12-23

Family

ID=10438689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4581262A Expired GB978729A (en) 1962-12-04 1962-12-04 Improvements relating to current transformers

Country Status (2)

Country Link
CH (1) CH414842A (en)
GB (1) GB978729A (en)

Also Published As

Publication number Publication date
CH414842A (en) 1966-06-15

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