GB527112A - Improvements in or relating to converting arrangements employing electric discharge devices - Google Patents

Improvements in or relating to converting arrangements employing electric discharge devices

Info

Publication number
GB527112A
GB527112A GB10145/39A GB1014539A GB527112A GB 527112 A GB527112 A GB 527112A GB 10145/39 A GB10145/39 A GB 10145/39A GB 1014539 A GB1014539 A GB 1014539A GB 527112 A GB527112 A GB 527112A
Authority
GB
United Kingdom
Prior art keywords
impedence
network
valve
grid
circuit
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
GB10145/39A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB527112A publication Critical patent/GB527112A/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
    • H02H7/125—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 rectifiers
    • H02H7/127—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 rectifiers having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

527,112. electric discharge apparatus for converting. WESTINGHOUSE ELECTRIC INTERNATIONAL. CO. March 31, 1939, No. 10145. Convention date, March 31, 1938. [Class 38 (ii)] In a converting arrangement comprising a grid controlled discharge device, the grid potentials for which are supplied from an impedence network, there is provided an auxiliary valve which modifies the impedence of an element of the network to cause blocking or partial blocking of the main discharge device when a back-ignition or overload occurs. The impedence network comprises a resistance-inductance network 10 and series impedence elements 18, 19, and the grid transformer 28 is connected to tappings on the network 10. When back-ignition occurs a valve 40 is rendered conductive by means of a coil 44 linking the D.C. circuit, and short circuits the impedence 19. This shifts the phase of the grid potentials sufficiently to block the discharge device 21. A relay 46 energized by the valve 40 breaks the circuit a predetermined time after energization to permit the valve 40 to become non-conductive. If an overload occurs the impedence 19 is short circuited by means of a relay 50 energized from the D.C. circuit. The impedence network is supplied through a phaseshifting device 36 which may include a positive sequence voltage network as described, for example, in Specification 161,167, [Class 38 (v)].
GB10145/39A 1938-03-31 1939-03-31 Improvements in or relating to converting arrangements employing electric discharge devices Expired GB527112A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US527112XA 1938-03-31 1938-03-31

Publications (1)

Publication Number Publication Date
GB527112A true GB527112A (en) 1940-10-02

Family

ID=21979409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10145/39A Expired GB527112A (en) 1938-03-31 1939-03-31 Improvements in or relating to converting arrangements employing electric discharge devices

Country Status (1)

Country Link
GB (1) GB527112A (en)

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