Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1988-12-01
1989-06-20
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 64, 307 87, 363 41, 363 97, 365228, 365229, H02J 700
Patent
active
048411604
ABSTRACT:
The subject invention is a power supply having an input for receiving a power signal, a DC storage device connected to the input, a primary output connected to the DC storage device and connectable to a battery, a DC to DC converter for converting the voltage at the DC storage device to an auxiliary DC voltage, the converter having a supply voltage input, and a switching circuit. The switching circuit includes first, second and third switches. The first switch is responsive to the power signal for providing the DC storage device voltage to the converter supply voltage input. The second switch is responsive to the voltage on the battery for providing the DC storage device voltage to the converter supply voltage input. The third switch is responsive to an auxiliary voltage on/off signal for overriding the second swtich.
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Diaz Luis A.
Yon Steven A.
Foote Douglas S.
Hawk Jr. Wilbert
Ip Paul
Jewett Stephen F.
NCR Corporation
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