| 摘要 |
<p>1. Support insulator (30 ; 30A ; 30B ; 30C ; 70) of a system of three connecting conductors (30R, 30S, 30T ; 30AR, 30AS, 30AT ; 30BR, 30BS, 30BT ; 30CR ; 30CS ; 30CT ; 72R, 72S, 72T) for high tension three-phase metal-card substation, of which the poles of the three phases R, S, T are located in a common tight housing (46), filled with insulating gas having a high dielectric strength, in particular sulfur hexafluoride, the three connecting conductors being coated in the disk-shaped body of moulded insulating material of the support insulator, and extending according to the parallel edges of a triangular prism going perpendicularly through said body in axial direction, characterized in that the three connecting conductors (30R, 30S, 30T ; 30AR, 30AT ; 30BR, 30BS, 30BT ; 30CR ; 30CS ; 30CT ; 72R, 72S, 72T) of the support insulator (30 ; 30A ; 30B ; 30C ; 70) show each one an identical axial length L, and that one of the connecting conductors (30S ; 30AS ; 30BS ; 30CS ; 72S) or one of the entrance bushings (60S) associated with one of the phases is shifted from the connecting conductors (30R, 30T ; 30AR, 30AS, 30AT ; 30BR, 30BT ; 30CR ; 30CT ; 72R, 72T) or from the entrance bushings (60R, 60T) coplanar with the other two phases, by a predetermined gap extending in axial direction and the length r of which is function of the poles spacing adapted to a good insulation level inside the housing.</p> |
