| 摘要 |
<p>PURPOSE:To carry out continuous supervision, by detecting the current generated in a protective device of an anti-corrosion layor at the insulated junction box where each single line of the 3 phase AC is connected and the current generated in the cable sheath and by suppling them to a control center and by comparing them. CONSTITUTION:Three of single core cable 1a-1c are connected through the insulated junction boxes 10a-10c. On the insulated junction boxes 10a-10c, the left and the right cable sheathes 13a-13c of the insulators 11a-11c are connected and construct the protective devices 7a-7c of the anti-corrosion layor. Cross bonding wires 5a-5c are cross-connected in order among the cable 11a-11c from phase (a) to (b), (c) and phase (a) again. The current of the protective device of anti-corrosion layor 7a-7c are detected by ampere meter 20a-20c and the detected value are supplied to the detected data processing unit 30 and compared with the settings. By this reason, continuous supervision are carried out without power down.</p> |
