| 摘要 |
PURPOSE:To perform an automatic operation, and to achieve a switching operation and cutting and returning operation without power interruption by previously detecting a cross current flowing at the time of closure at each zone switch, a loop point switch, and selecting an optimum zone switch or loop point switch for looping in a master station based on the cross current data. CONSTITUTION:A cross current value flowing when loop point switches SS20, SS30 or zone switches SS11, SS12, SS21, SS22, SS31 are closed is detected previously by a cross current detector, these cross currents are collected through a data transmission system in a master station 40, optimum loop point switches SS20, SS30 having small influence to a system when looped or the zone switches SS11, SS12, SS21, SS22, SS31 are selected, the selected switch is closed under a remote control through a data transmission system, then the switches SS20, SS30, or the switch SS11, SS12, SS21, SS22, SS31 are opened under a remote control during the power interruption zone, and the line is switched or cut and returned without power interruption. |
