GB829455A - Improvements in or relating to electric lighting installations - Google Patents

Improvements in or relating to electric lighting installations

Info

Publication number
GB829455A
GB829455A GB2409857A GB2409857A GB829455A GB 829455 A GB829455 A GB 829455A GB 2409857 A GB2409857 A GB 2409857A GB 2409857 A GB2409857 A GB 2409857A GB 829455 A GB829455 A GB 829455A
Authority
GB
United Kingdom
Prior art keywords
inductors
cycles
lamps
ripple
july
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
GB2409857A
Inventor
Julias Cates
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 GB2409857A priority Critical patent/GB829455A/en
Publication of GB829455A publication Critical patent/GB829455A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

829,455. Signalling over power lines. GENERAL ELECTRIC CO. Ltd. July 18, 1958 [July 30, 1957], No. 24098/57. Class 40 (4). A number of discharge lamps are switched on and off by ripple control, each discharge lamp having a power factor correction circuit comprising at least a capacitor and in one or more, but not all circuits, an inductor also the number of inductors being used as a variable to present high impedance to the ripple frequency. As illustrated, 200 high pressure 400-watt mercury vapour lamps are connected between one phase and neutral of a three-phase supply. The ripple current injected over transformer T2 produces 5 volts at 455 cycles to which relays R1 to R200 respond, or at 480 cycles to which the relays fall back. Each of the lamps L1 to L200 is in series with a ballast inductor and a capacitative shunt is provided as power factor correction. The number of inductors I, typically 116, is chosen to present the ripple frequency generator of 455 cycles with a high impedance and the inductors are distributed as uniformly as possible along the power line.
GB2409857A 1957-07-30 1957-07-30 Improvements in or relating to electric lighting installations Expired GB829455A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2409857A GB829455A (en) 1957-07-30 1957-07-30 Improvements in or relating to electric lighting installations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2409857A GB829455A (en) 1957-07-30 1957-07-30 Improvements in or relating to electric lighting installations

Publications (1)

Publication Number Publication Date
GB829455A true GB829455A (en) 1960-03-02

Family

ID=10206349

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2409857A Expired GB829455A (en) 1957-07-30 1957-07-30 Improvements in or relating to electric lighting installations

Country Status (1)

Country Link
GB (1) GB829455A (en)

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