Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1997-11-10
2000-06-20
Wong, Don
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315137, 315361, 315 76, H05B 3702
Patent
active
060781467
ABSTRACT:
Disclosed herein is a centralized power reducing device, particularly for lighting installations, comprising, on each phase of the installation power source, a winding (16) in series with load (10), wound on a magnetic core (18), the current supplied to load (10) flowing therethrough, a second winding (20) wound on said magnetic core (18), a drive or control current flowing therethrough, means (22, 24) for changing said drive or control current and wherein said means (22,24) for establishing the extent of the drive or control current in said second winding (20) are comprised of a multiple-tap autotransformer (22), the connection of said autotransformer (22) taps occurring by means of relays (24) controlled by a logic unit (26).
REFERENCES:
patent: 4082981 (1978-04-01), Morton et al.
patent: 4494010 (1985-01-01), Donnelly
patent: 4964058 (1990-10-01), Brown, Jr.
patent: 5394064 (1995-02-01), Ranganath et al.
Abramson Ronald
Clinger James
Sullivan Peter A.
Wong Don
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