| 摘要 |
PURPOSE:To perform feed to an optical cable system by four feeders without affecting on one-side feed by performing both-side feed between two feeding devices, and performing the one-side feed on remaining devices by a relay energized by the devices. CONSTITUTION:A first control circuit 1 is constituted of the normally-open contact r 41 and the normally-close contact r 42 of a fourth relay R4, the relay 5, and a switching contact r 5, and the contacts r 42 and r 5 are connected in series to a first relay R1, and the relay 5 performs the submarine ground of a first feeding device W by closing the contact r 41, and also, it is self-held by the contact r 5. A second control circuit 2, a third control circuit 3, and a fourth control circuit 4 are constituted similarly, and a second feeding device X, a third feeding device Y, and a fourth feeding device Z are self-held by relays R6, R7, and R8, respectively. Thus, it is possible to perform the feed between four feeding devices by using a both-side feed and one-side feed system. |
