| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a PLC signal relay system capable of stable power line communication by restraining attenuation in a PLC signal as much as possible.SOLUTION: A PLC signal relay system according to an embodiment includes: a bypass line 40 capacitive-coupled with the earth; a branch coupler 34 coupled with a branch 16 by capacitive coupling or inductive coupling; and a bypass line coupler 32 coupled with the bypass line 40 by inductive coupling. The PLC signal relay system comprises a bypass device 31 for transmitting a PLC signal between the branch 16 and the bypass line 40. Because the PLC signal flows through a closed loop circuit 42 formed by the bypass line 40 and the earth, the PLC signal relay system communicates circumventing signal attenuating devices 11, 12 placed on a power line network 10.</p> |
