Power supply device

Details Power supply device Power supply device

1991-07-16

1993-05-25

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307 42, 307 43, 307 64, H02J 300

Patent

active

052143112

ABSTRACT:
A power supply device includes an emergency power cut-off switch, a basic power supply unit supplied with an external alternating current electric power through the emergency power cut-off switch and a plurality of expansion power supply units supplied respectively with external alternating current electric power through power supply switches and provided sequentially and externally to the basic power supply unit. Diodes or current control elements are inserted in a path connecting a first line supplied with direct current outputs from the power supply units in the preceding stages of the externally provided expansion power supply units to a second line for supplying direct current outputs to the power supply units in the next stages of the externally provided expansion power supply units.

REFERENCES:
patent: 4051384 (1977-09-01), Ansorge
patent: 4670661 (1987-06-01), Ishikawa
patent: 4672226 (1987-06-01), Sutherland

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