Re:Robot wraps fiber optic cables around existing power lines
by mmmBacon on Thursday July 16, 2020 @09:42AM
(#23858858)
I’m not sure what the diameter is of these cables but I found a data sheet that shows MV (33kV) cables are <50mm in diameter. If that’s true then, the bend radius is <25mm.
If the winding is sparse, let’s say 1 turn every 1m on a 38mm diameter cable, then the amount of length added will be ~1% of the total linear length (neglecting the cable sag). So the amount of added length due to winding it will negligible.
At 1000 bends per km, if we assume loss is 0.001dB per bend, then we’d add 1dB per km.
If the winding is sparse, let’s say 1 turn every 1m on a 38mm diameter cable, then the amount of length added will be ~1% of the total linear length (neglecting the cable sag). So the amount of added length due to winding it will negligible.
At 1000 bends per km, if we assume loss is 0.001dB per bend, then we’d add 1dB per km.
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