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    • 10. 发明专利
    • DECIDING DEVICE FOR POWER DISTRIBUTION LINE FAULT SECTION
    • JPS62177462A
    • 1987-08-04
    • JP2063386
    • 1986-01-30
    • MITSUBISHI ELECTRIC CORP
    • NARITA TOSHIHARUTSUJIKURA YOSUKE
    • G01R31/08H02H3/26
    • PURPOSE:To securely decide a fault section and to recover the fault section speedily by comparing the level of the passing current of each section switch, the direction to a voltage, or position relation and detecting the abrupt variation of a current distribution. CONSTITUTION:Pieces of current information detected by current transformers CT1-CT3 are processed by section switch controllers C1-C3 to obtain pieces of information on the levels, directions to voltages, or position relation. The pieces of information on the currents are sent to a master station deciding device 9 through transmission terminals T0-T3 and a communication line 7. The device 9 compares the pieces of current information on respective section switches SS1-SS3 to decide a fault section. An opening signal is sent to section switches adjoining to the fault section to make a disconnection from the power distribution line and in another way, a turn-on lock signal is sent out to perform a process in which turn-on operation is inhibited after power reception, thereby refeeding electric power to only necessary sections. Further, the fault section is displayed at a master station 8 to enable early recovery activity.