| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve such a structure that is free from effect of bubble generated from a superconducting coil without enlarging a cryogenic container for accommodating the superconducting coil, even if a high voltage bushing is mounted thereon. <P>SOLUTION: A very low temperature bushing device includes: the cryogenic container 1; the super conducting coil 3 accommodated in the cryogenic container 1 together with liquid nitrogen 2; and a pair of very low temperature bushings 6a, 6b which are coupled to be disposed in the cryogenic container 1 and which electrically connect the superconducting coil 3 from a low temperature portion in the cryogenic container 1 to a normal temperature portion outside the cryogenic container 1, thereby electrically insulating the ground. The very low temperature bushing device has such a configuration that: bushing pockets 4a, 4b are disposed by allowing side surfaces at different positions of the cryogenic container 1 to be coupled by each of connection tubes 5a, 5b; the very low temperature bushings are accommodated in the bushing pockets; and each connection portion of the very low temperature bushings to the superconducting coil 3 is disposed so that an angle which an upper outermost layer end of the superconducting coil 3 and a horizontal plane make is in response to a position of a direction lower than 60°. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
