Electric lamp and discharge devices: systems – Polyphase a.c. supply – Plural discharge control discharge device load devices
Patent
1978-09-25
1980-08-26
Moore, David N.
Electric lamp and discharge devices: systems
Polyphase a.c. supply
Plural discharge control discharge device load devices
315314, 315307, H03K 316
Patent
active
042197597
ABSTRACT:
A three phase voltage controller for controlling the voltage applied to a three phase load. The controller includes three autotransformers which have a plurality of output taps for stepping down the output voltage. Contacts to the taps are selected for a high output voltage and a low output voltage with the contacts selected either manually or automatically. In the automatic mode, time delay is provided in switching from a high output voltage to a low output voltage, and a re-cycle timer is provided to re-cycle from a low voltage to the high voltage temporarily. Single phase control contactors are provided to remove voltage from one or more output lines for load shedding. Circuit breakers are provided for removing the controller and for directly applying the input line voltage to the output line.
REFERENCES:
patent: 3700925 (1972-10-01), Wood
patent: 3754160 (1973-08-01), Jensen
Lemelson, H. "Energy Conservation in an All Electric Building" Electrical Contruction and Maintenance 4/78, pp. 63-66.
Novak, W. "Saving Energy Through Load Scheduling, Cycling and Shedding," Electrical Construction and Maintenance, 4/78.
Widelite Corporation Bulletin on Automatic Energy Control System, copyright 1976.
Allen-Bradley, Product Data Bulletin 1820, Demand/Schedule Controller General Electric Product Bulletin on Maxi-Miser II, 4/78.
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