GB667927A - Improvements in and relating to protective circuits for electrical windings - Google Patents

Improvements in and relating to protective circuits for electrical windings

Info

Publication number
GB667927A
GB667927A GB15274/50A GB1527450A GB667927A GB 667927 A GB667927 A GB 667927A GB 15274/50 A GB15274/50 A GB 15274/50A GB 1527450 A GB1527450 A GB 1527450A GB 667927 A GB667927 A GB 667927A
Authority
GB
United Kingdom
Prior art keywords
terminal
section
winding section
june
potential difference
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
GB15274/50A
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 GB667927A publication Critical patent/GB667927A/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
    • H01F27/343—Preventing or reducing surge voltages; oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

667,927. Transformers; protective arrangements. BRITISH THOMSON - HOUSTON CO., Ltd. June 19, 1950 [June 30, 1949], No. 15274/50. Classes 38 (ii) and 38 (iv). A stationary electric induction device, such as an autotrans. former, has a first and a second winding section, the first winding section 1-3 having a terminal 3 physically adjacent a terminal 4 of the second winding section 4-6, the two sections being connected by a conductor between an intermediate point 2 on the first section and the terminal 4 of the second section, a protective arrangement comprising a resistor R having a negative resistancevoltage characteristic being connected between the terminal 3 and an intermediate point 5 on the second section, the point 5 being so positioned that the potential difference between 2-3 is normally substantially equal to that between 4-5. Any excessive potential difference between the terminals 3, 4 due to an abnormal condition, such as a stroke of lightning hitting a line connected to the terminal 1, is thus prevented since the resistance of the element R would fall to provide a low resistance path between the points 3, 5. Specification 292,110, [Class 38 (ii)], is referred to.
GB15274/50A 1949-06-30 1950-06-19 Improvements in and relating to protective circuits for electrical windings Expired GB667927A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US667927XA 1949-06-30 1949-06-30

Publications (1)

Publication Number Publication Date
GB667927A true GB667927A (en) 1952-03-12

Family

ID=22071731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15274/50A Expired GB667927A (en) 1949-06-30 1950-06-19 Improvements in and relating to protective circuits for electrical windings

Country Status (1)

Country Link
GB (1) GB667927A (en)

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