The superconducting (SC) bus-lines with total length of 497 mare used as the current transmission lines for the experimental fusion device,LHD. Cryostable condition of the SC coils has been kept for more than fivemonths in every experimental campaign. The internal structure of the SCbus line at the bending portions was observed by taking X-ray photographsbefore and after cooling down in 2002. The positions of the SC cable andinner corrugated tubes show good agreement with those of the first coolingdown in 1998. The average heat input into three current-lead cryostats was1.98 - 2.13 W/m2. The average heat load into the thermal shieldingchannels of the SC bus lines was 2.84 - 2.92 W/m. These measured valuesof the heat inputs and heat loads show good agreement with those of thedesigned values.
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