| 摘要 |
PURPOSE:To restore communication between residual cables even when a fault is generated at any one of submarine cables to be connected to the device by making same the operational current directions of first - third relays in the case of observing it from the coupling point of Y-shaped electric paths. CONSTITUTION:The driving part 107L of the first relay 107 is arranged at a first electric path 101, and a switching part 107C grounds a second connecting terminal 105 while disconnecting it from a second electric path 102. The driving part 108L of the second relay 108 is arranged at a second electric path 102, and a switching part 108C grounds a third connecting terminal 106 while disconnecting it from a third electric path 103. The driving part 109L of a third relay 109 is arranged at the third electric path 103, and a switching part 109C grounds a first connecting terminal 104 while disconnecting it from a first electric path 101. Then, the operational current directions of the first - third relays 107-109 are made the same in the case of being observed from the coupling point of the Y-shaped electric paths. Thus, even when the fault is generated at any one of submarine cables to be connected to the device, communication can be restored between the residual cables. |
