| 摘要 |
<p>PROBLEM TO BE SOLVED: To discriminate the phase of partial discharge by mold-forming a magnetic field sensor and a signal delivering line for delivering respective sensor signals in one united body at intermediate positions on respective straight lines connecting an apex bus of isosceles triangles bus arrangement to other two buses. SOLUTION: An insulation spacer 1 for three-phase bulk type gasinsulated switchgear arranges magnetic field sensor SAB and SAC at respective intermediate positions between a bus 100a and other buses 100b and 100c as the apex of an isosceles triangles bus arrangement and is mold-formed in one united body in a mold resin 4 together with the signal delivering lines 60ab, 60ac. And the signal delivering lines 60ab, 60ac penetrates through a metal flange 9 of the outer frame of the insulation spacer 1 for three-phase bulk type gas- insulated switchgear and is pulled out to the outside through a relay terminal 8 electrically insulating the metal frame 9. Here, the magnetic field sensors SAB, SAC are arranged by considering the directivity of these magnetic field sensors.</p> |
