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GB853963A - Improvements in and relating to protecting systems for alternators - Google Patents

Improvements in and relating to protecting systems for alternators

Info

Publication number
GB853963A
GB853963A GB782956A GB782956A GB853963A GB 853963 A GB853963 A GB 853963A GB 782956 A GB782956 A GB 782956A GB 782956 A GB782956 A GB 782956A GB 853963 A GB853963 A GB 853963A
Authority
GB
United Kingdom
Prior art keywords
alternator
rotor
flux
rotating
protective
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
GB782956A
Inventor
Paul Mathews
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
Priority to GB782956A priority Critical patent/GB853963A/en
Publication of GB853963A publication Critical patent/GB853963A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

853,963. Protective cut-out arrangements. BRITISH THOMSON-HOUSTON CO. Ltd. March 11, 1957 [March 13, 1956], No. 7829/56. Class 38 (5). A protective arrangement for a polyphase alternator 1 comprises a dynamo-electric machine having a stator with windings 5 energized from current transformers 6 so as to provide a rotating flux and a rotor 7 which is driven by a synchronous motor 3 in the same direction as the rotating flux. Hence when the output of the alternator 1 is balanced no voltage appears at slip-rings 9 connected to the rotor windings 8, but in the event of unbalance, the negative sequence components produce a flux rotating in the reverse direction to the rotor 7 so that a voltage appears at the slip-rings 9. This voltage is proportional in magnitude to the magnitude of the negative sequence components and is of a frequency twice that of the alternator. A protective relay 10 is supplied from the sliprings and may be tuned to the double frequency.
GB782956A 1956-03-13 1956-03-13 Improvements in and relating to protecting systems for alternators Expired GB853963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB782956A GB853963A (en) 1956-03-13 1956-03-13 Improvements in and relating to protecting systems for alternators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB782956A GB853963A (en) 1956-03-13 1956-03-13 Improvements in and relating to protecting systems for alternators

Publications (1)

Publication Number Publication Date
GB853963A true GB853963A (en) 1960-11-16

Family

ID=9840557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB782956A Expired GB853963A (en) 1956-03-13 1956-03-13 Improvements in and relating to protecting systems for alternators

Country Status (1)

Country Link
GB (1) GB853963A (en)

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