GB549032A - Improvements in means for reducing equalising oscillations occurring with multi-pole surges in electrical transformers - Google Patents

Improvements in means for reducing equalising oscillations occurring with multi-pole surges in electrical transformers

Info

Publication number
GB549032A
GB549032A GB9998/41A GB999841A GB549032A GB 549032 A GB549032 A GB 549032A GB 9998/41 A GB9998/41 A GB 9998/41A GB 999841 A GB999841 A GB 999841A GB 549032 A GB549032 A GB 549032A
Authority
GB
United Kingdom
Prior art keywords
impedance
transformer
surges
frequency
voltages
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
GB9998/41A
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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Germany
Publication of GB549032A publication Critical patent/GB549032A/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
    • H01F27/345—Preventing or reducing surge voltages; oscillations using auxiliary conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

549,032. Protective arrangements. AKT.-GES. BROWN, BOVERI & CIE. Aug. 6, 1941, No. 9998. Convention date, Dec. 24, 1940. [Class 38 (iv)] Oscillatory voltages at the star point of a polyphase transformer due to multipole surges are damped by an impedance responsive to surge frequency arranged in a part of the transformer circuit which is liable to be traversed by currents of system frequency as well as of surge frequency. An impedance Z comprising an inductance in parallel with a resistance (with or without series capacitance) and having no influence at system frequency, may close the. circuit of polygon connected windings on the transformer, or be distributed equally between the winding terminals. The voltages developed across the impedance may be applied in opposition to voltages occurring in the earth connection and the star point either directly or through a damping impedance (resistance) R. The Specification as open to inspection under Sect. 91 comprises also a modification. The secondary winding of a transformer in the earth connection may be connected to a damping impedance responsive to surge frequency. This subject-matter does not appear in the Specification as accepted.
GB9998/41A 1940-12-24 1941-08-06 Improvements in means for reducing equalising oscillations occurring with multi-pole surges in electrical transformers Expired GB549032A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH549032X 1940-12-24

Publications (1)

Publication Number Publication Date
GB549032A true GB549032A (en) 1942-11-03

Family

ID=4519511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9998/41A Expired GB549032A (en) 1940-12-24 1941-08-06 Improvements in means for reducing equalising oscillations occurring with multi-pole surges in electrical transformers

Country Status (1)

Country Link
GB (1) GB549032A (en)

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