Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1990-12-19
1993-03-02
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 64, 307 86, H02J 906
Patent
active
051912295
ABSTRACT:
A circuit (10) for transferring power delivered to a load (16) from a primary voltage source (12) to a secondary power source (14) uses three transistors (32, 40, 46) which switch whenever there is a loss of power from the primary source (12). A capacitor (36), interposed between the first transistor (32) and the second transistor (40) attenuates the signal from the first transistor (32) after a predetermined amount of time to switch the second and third transistors (40,46) to isolate the load (16) from the secondary power source (14).
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Davis Eric W.
Studer John C.
Fleming Fritz M.
Pellinen A. D.
United Technologies Corporation
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