Fluorescent-lighting-system voltage controller

Details Fluorescent-lighting-system voltage controller Fluorescent-lighting-system voltage controller

1982-09-22

1985-04-23

Dixon, Harold

Electric lamp and discharge devices: systems

Polyphase a.c. supply

Transformer in the supply circuit

315146, 315276, 315277, H05B 4116

Patent

active

045132240

ABSTRACT:
A voltage controller for use with a fluorescent-lighting system, the controller including a three-phase transformer having three auto-transformer windings each for developing two reduced voltages, three contactors for selectively coupling the full voltage and the reduced voltages to the lighting system, the contactors being switched in closed-transition fashion to avoid power interruptions, and another contactor for opening the winding-neutral connections during voltage switching to avoid shorting the transformer.

REFERENCES:
patent: 4189664 (1980-02-01), Hirschfeld
patent: 4219759 (1980-08-01), Hirschfeld

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