Control system for electrical lighting.
Номер патента: EP0289542A1
Опубликовано: 09-11-1988
Автор(ы): David Alan Finch, John Arthur Lawrence
Принадлежит: Econolight Ltd
Опубликовано: 09-11-1988
Автор(ы): David Alan Finch, John Arthur Lawrence
Принадлежит: Econolight Ltd
Реферат: PCT No. PCT/GB87/00756 Sec. 371 Date Jul. 11, 1988 Sec. 102(e) Date Jul. 11, 1988 PCT Filed Oct. 26, 1987 PCT Pub. No. WO88/03353 PCT Pub. Date May 5, 1988.A control system for lighting a bank of fluorescent lamps, includes input terminals (10, 11) for a mains voltage (e.g. 240 v) and output terminals (20, 21) to which the bank of lamps is connected. A transformer (T1) provides a reduced voltage (216 v) as compared to the mains supply voltage. The transformer (T2) provides a supplementary voltage (24 v). Upon start up of the circuit, a control circuit (CC) operates contact (A1) to energize the transformer (T2) so that terminals (20, 21) receive both the reduced voltage from (T1) and the supplementary voltage from (T2) (i.e. 240 v) which is sufficient to ignite the fluorescent lamps. The control circuit (CC), after a predetermined delay (e.g., 15 seconds), switches contact (A1) to disconnect the supplementary voltage from (T2). The lamps then continue to operate on the reduced voltage (216 v) thereby reducing the power consumed by the lamps.
Control system for electrical lighting
Номер патента: CA1321811C. Автор: John Arthur Lawrence,David Alan Finch. Владелец: Econolight Ltd. Дата публикации: 1993-08-31.