To provide a magnetic shielding direct-current power facility with reduced magnetic flux density around it.
Specified portions of the go cable 1 from and the return cable 2 to the direct-current power facility are placed in proximity to each other to cancel out the magnetic fields arising from the current in both the cables 1 and 2. Required portions of the rest of the go cable 1 and/or the return cable 2 are covered with a duct 3 made of a magnetic shielding material to reduce the magnetic flux density around the facility due to the current in the go cable 1 and the return cable 2. Preferable, a gutter member formed by magnetically coupling a plurality of magnetic shielding plates formed by laminating high- permeability steel plates so that its cross sections are in U shape, and a lid member that comprises magnetic shielding plates and is removably and magnetically coupled with the opening of the gutter member, are included in the duct 3. More preferably, the duct 3 is provided with slits for heat radiation oriented at a right angle to the direction of the length of the cables.
SAITO TAKESHI
KONO TAKESHI
TANABE TAKESHI
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