Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1994-03-18
1997-04-08
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 85, 307 38, 364492, H02J 700
Patent
active
056190778
ABSTRACT:
A system and method for providing an alternate AC voltage to an electrical load having a main AC voltage. The system and method include a signal generator for generating a main AC voltage signal representing the value of the main AC voltage, and a processor for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period. The system and method also include a control signal generator for generating a control signal in response to the main AC voltage signal, the main AC voltage failure time period, the main AC voltage restoration time period, and a pre-selected delay time period, and a switch for switching the electrical load between the main AC voltage and the alternate AC voltage in response to the control signal.
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Green John D.
Hissong John B.
Sheka Gregory J.
Tan Ming D.
Thompson Michael L.
Holophane Lighting, Inc.
Kaplan Jonathan S.
Shoop Jr. William M.
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