| 摘要 |
PROBLEM TO BE SOLVED: To provide a nuclear instrumentation system which suppresses noises intruding by way of a ground loop consisting of signal cables and a building earth trunk line. SOLUTION: The system comprises a structure where a power supply is composed of batteries, the system includes a charger connected to these batteries, a switching device that connects or disconnects a station power supply or an uninterruptible power supply 10 with the charger and a charge regulating circuit 36 for outputting control signals so that the charger, can be connected to the station power supply or the uninterruptible power supply by the switching device when the batteries are not used and can be disconnected when they are used and the power supply are isolated electrically from the building earth trunk line 18 to suppress noises intruding the nuclear instrumentation system by way of the ground loop. COPYRIGHT: (C)2009,JPO&INPIT
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