H - Electricity – 02 – J
Patent
H - Electricity
02
J
348/16, 323/5
H02J 3/38 (2006.01) G05F 1/59 (2006.01) G05F 1/62 (2006.01) G06F 1/28 (2006.01) H02H 7/12 (2006.01) H02J 9/06 (2006.01)
Patent
CA 1319412
APPARATUS FOR PARALLEL OPERATION OF TRIPORT UNINTERRUPTABLE POWER SOURCE DEVICES ABSTRACT OF THE DISCLOSURE In an apparatus for parallel operation of plural un- interruptable power source devices, each power source device includes at least one of an operation mode monitoring means for a logic operation on the output of the AC input monitor- ing circuit of each uninterruptable power source devices to feed the result thereof as a mode controlling signal to the mode controlling means, a parallel synchronizing signal generating means for a logic operation on the output of an oscillating circuit which drives the invertor in each uninterruptable power source devices and, on detection of abnormality in the AC input, feeding the result thereof as a trigger pulse to the oscillating circuit, and a synchroni- zation monitoring means for a logic operation on the output from the oscillating circuit in each uninterruptable power source devices and, when the differences between the phase of the output from the oscillating circuit of one of the triport uninterruptable power source devices and that from the oscillating circuits of remaining triport uninterrupt- able power source devices exceed the prescribed level, issuing a parallel-off signal to open the paralleling switch of said one triport uninterruptable power source device.
613894
Kawata Yasuhiro
Koike Hidehiro
Tominaga Fukutoshi
Nishimu Electronics Industries Co. Ltd.
Swabey Ogilvy Renault
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