Centralized power reducing device, particularly for lighting ins

Details Centralized power reducing device, particularly for lighting ins Centralized power reducing device, particularly for lighting ins

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.

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