GB617840A - Improvements in or relating to electric rectifying systems having protective arrangements - Google Patents

Improvements in or relating to electric rectifying systems having protective arrangements

Info

Publication number
GB617840A
GB617840A GB3040646A GB3040646A GB617840A GB 617840 A GB617840 A GB 617840A GB 3040646 A GB3040646 A GB 3040646A GB 3040646 A GB3040646 A GB 3040646A GB 617840 A GB617840 A GB 617840A
Authority
GB
United Kingdom
Prior art keywords
rectifiers
load
breaker
circuit
total
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
GB3040646A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3040646A priority Critical patent/GB617840A/en
Publication of GB617840A publication Critical patent/GB617840A/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
    • H02H7/10—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 converters; for rectifiers
    • H02H7/12—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 converters; for rectifiers for static converters or rectifiers
    • H02H7/1209—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 converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes

Landscapes

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

Abstract

617,840. Rectifying. GENERAL ELECTRIC CO., Ltd., and THOMPSON, W. G. Oct. 11, 1946, No. 30406. [Class 38 (ii)] [Also in Group XXXVII] Mercury arc rectifiers operating in parallel have an A.C. protective circuit which trips a main circuit-breaker should unbalanced loading occur. Three rectifiers 1, 2, 3 are supplied from a common 3/6 phase transformer 4, which has an auxiliary winding (not shown) supplying a star/delta transformer 8. The secondary windings 10 of the latter transformer are connected to choke coils 11, 12, 13 which are wound on closed cores 14, 15, 16 through which the outgoing rectifier leads 17, 18, 19 pass. Connected between the star points 20, 21 are the trip coil 7 of the circuit-breaker 6 and a further choke coil 22 wound on a core 23 and associated with the total-load line 24. The choke coils 11, 12, 13 have equal impedance, while the rectifiers share the load, but unbalance in the load-sharing causes the impedances to differ, the protective circuit becomes unbalanced, and trip coil 7 is energized to trip the circuit-breaker. Choke coil 22 has a high impedance when the rectifiers are lightly loaded and prevents the tripping of the circuitbreaker until the total load current reaches a predetermined value. The Specification refers also to the use of current transformers associated with the A.C. sides of the rectifiers, the outputs of these transformers being so summed that the total is normally zero.
GB3040646A 1946-10-11 1946-10-11 Improvements in or relating to electric rectifying systems having protective arrangements Expired GB617840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3040646A GB617840A (en) 1946-10-11 1946-10-11 Improvements in or relating to electric rectifying systems having protective arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3040646A GB617840A (en) 1946-10-11 1946-10-11 Improvements in or relating to electric rectifying systems having protective arrangements

Publications (1)

Publication Number Publication Date
GB617840A true GB617840A (en) 1949-02-11

Family

ID=10307202

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3040646A Expired GB617840A (en) 1946-10-11 1946-10-11 Improvements in or relating to electric rectifying systems having protective arrangements

Country Status (1)

Country Link
GB (1) GB617840A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698415A (en) * 1952-12-05 1954-12-28 Westinghouse Electric Corp Protective system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698415A (en) * 1952-12-05 1954-12-28 Westinghouse Electric Corp Protective system

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