| 摘要 |
<p>Disclosed is an insulating spacer (3) for use in a gas-insulated electric apparatus for supporting a high-tension electric conductor (2) inserted through a metallic pipe (1) enclosing an insulating gas, in which the insulating spacer (3) is provided with a plurality of fins (7c, 8c, 9c; 5, 6; 7a, 8a, 9a; 7b, 8b, 9b, 10b, 11b; 10, 11, 12, 15, 16, 17, 18; 19, 20, 21, 22, 23) on its creeping surface, and in which fin intervals (dc1, dc2, dc3, dc4; d; da1, da2, da3, da4; db1, db2, db3, db4, db5, db6; d7, d8, d9, d13, d14, d15, d16; d19, d20, d21, d22) between the metallic pipe and one of the fins adjacent to the metallic pipe, between adjacent ones of the fins, and between the high-tension electric conductor and one of the fins adjacent to the high-tension electric conductor are formed in a manner so that the fin interval (dc1, d9, d13, d16, d19) formed at a position is made narrower than the fin interval (dc4, d7, d14, d15, d22) formed at a position where a creeping component electric filed is lower than that in the first-mentioned position. Thus, the dielectric strength improvement rate becomes larger at a position where the creeping component electric field is higher so that substantially even creeping dielectric strength can be obtained even when an electrically conductive foreign matter adheres wherever on the outside of the insulating spacer.</p> |
