GB225844A - Method of reducing the no-load losses on lightly-loaded three-phase transformers - Google Patents

Method of reducing the no-load losses on lightly-loaded three-phase transformers

Info

Publication number
GB225844A
GB225844A GB28575/24A GB2857524A GB225844A GB 225844 A GB225844 A GB 225844A GB 28575/24 A GB28575/24 A GB 28575/24A GB 2857524 A GB2857524 A GB 2857524A GB 225844 A GB225844 A GB 225844A
Authority
GB
United Kingdom
Prior art keywords
over
change
light loads
reducing
switch
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
GB28575/24A
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.)
Koch and Sterzel AG
Original Assignee
Koch and Sterzel AG
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 Koch and Sterzel AG filed Critical Koch and Sterzel AG
Publication of GB225844A publication Critical patent/GB225844A/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
    • H01F27/341—Preventing or reducing no-load losses or reactive currents

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

225,844. Koch & Sterzel Akt.-Ges. Dec. 4, 1923, [Convention date]. Polyphase transformers.-Relates to a method of reducing no-load losses at light loads on threephase transformers in which the primary windings are changed over from delta connection at full load to star connection at light loads, and consists in arranging the secondary windings so that they may be star connected under both conditions, the same transformation ratio being maintained by dividing each secondary winding into two sections which are connected in parallel and starred at full load as shown in Fig. 1, and double-star connected at light loads as shown in Fig. 3. Switch means for effecting the change-over are illustrated diagrammatically in the drawings accompanying the Specification. The change-over switch may be disposed in the oil-filled casing of the transformer and coupled with a main oil-immersed switch. The change-over may be time controlled or relays may be employed for automatically effecting the change-over according to current variations in either the primary or secondary windings.
GB28575/24A 1923-12-04 1924-11-28 Method of reducing the no-load losses on lightly-loaded three-phase transformers Expired GB225844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE225844X 1923-12-04

Publications (1)

Publication Number Publication Date
GB225844A true GB225844A (en) 1925-07-09

Family

ID=5863037

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28575/24A Expired GB225844A (en) 1923-12-04 1924-11-28 Method of reducing the no-load losses on lightly-loaded three-phase transformers

Country Status (1)

Country Link
GB (1) GB225844A (en)

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