Power feed line switching circuit, branching device, submarine cable system, and power feed line switching method

Abstract

This power feed line switching circuit for switching connection states among a plurality of power feed lines has a plurality of switching circuits, and a variable resistance unit. The switching circuits switch the connection states among the power feed lines. The variable resistance unit is disposed on the connecting paths among the power feed lines before and after the switching, and the resistance values thereof change in conjunction with operations of the switching circuits.

Description

technical field [0001] The invention relates to a feeder circuit switching circuit, a branch device, a submarine cable system, and a feeder line switching method used in a submarine cable system. Background technique [0002] In submarine cable systems, arrangements are known to switch feeders when a fault occurs in any feeder for supplying a constant direct current to a repeater or branch reconfiguration) in order to reduce the area affected by failures (see, for example, Patent Document 1 [PTL1]). [0003] as in Figure 7 As explained in , the submarine cable system described in PTL1 is such that repeaters 74 to 76 are arranged between branch equipment 70 and each of terminal stations 71 to 73 . Furthermore, the branch device 70 and the terminal station devices 71 to 73 are connected by paths 77 to 79 and optical fibers 80 to 82 constituting feeder lines, respectively. In a state where no fault occurs in the paths 77 to 79, the paths 77 and 78 are connected through a fee...

AI Technical Summary

Problems solved by technology

[0009] In view of the above, an object of the present invention is to provide a feeder line switching circuit that solves the abov

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