Electricity: electrical systems and devices – Safety and protection of systems and devices – Feeder protection in distribution networks
Reexamination Certificate
2007-07-17
2007-07-17
Deberadinis, Robert L. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Feeder protection in distribution networks
C307S066000, C307S080000, C307S082000, C307S086000, C361S018000, C361S079000, C361S093100
Reexamination Certificate
active
10412319
ABSTRACT:
A reliable uninterruptible DC power supply device. The DC backup power supply device includes an AC/DC converter, a DC/DC converter, voltage step-up/down choppers and a battery connected to a DC path of a main circuit connected with a load via a switch, and a microcomputer. In the device, under control of the microcomputer, the voltage step-up/down choppers are first operated under a condition that the MOS FET was turned OFF for self diagnosis of the backup power supply device. Next, the switch is turned ON to execute the remaining self diagnosis. The DC backup power supply device can execute its self diagnosis with a reduced likelihood of danger of exerting an adverse effect on the main circuit and also can exhibit a reliable uninterruptible power supply function.
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Communication from European Patent Office dated Dec. 11, 2006.
Gotou Takao
Hamaogi Masahiro
Isogai Masato
Kanouda Akihiko
Miyata Toshikatsu
Deberadinis Robert L.
Hitachi Computer Peripherals Co., Ltd.
Hitachi Maxell Ltd.
Kaplan Hal I.
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