| 摘要 |
<p>PURPOSE:To reduce CT in radial direction by a method wherein, in a conductor extending in a fixed direction, the outside diameter of the part surrounded by a through type transformer(CT) and its vicinity are made small. CONSTITUTION:The outside diameter of the part located inside a CT main body 3 in a conductor 2 is made smaller than the outside diameter of the other part. Then, the outer circumferential surface of the part having the outside diameter size of D, and the outer circumferential surface of the part having the outside diameter size of (d) are connected with a taper 6. As a result, the inside diameter of a gas-insulated opening and closing device 1 can be made small in size in radial direction. The values of the outside diameter size (d) of the outside diameter part 7 and the inside diameter size D2 of a shield part 5 are worked out by computation of electric field so that a minimum resistance value will be obtained. As the degree of the temperature rize of a current application part becomes larger by the increase of the resistance value on the small diameter part of the conductor 2, the temperature rise can be suppressed by increasing the outside diameter of the large diameter part on both sides of the small diameter part 7.</p> |
