| 摘要 |
<p>PURPOSE:To obtain an insulating support for preventing a short circuit fault from spreading in which insulating boards do not separate from each other even upon occurrence of repelling electromagnetic forces between main circuit conductors due to short circuit fault. CONSTITUTION:One 5 of insulating boards 5, 7 for supporting main circuit conductors 1, 2, 3 is provided with a protrusion while the other insulating board 7 is provided with a recess wherein the overlapping part is set larger than the diameter of the main circuit conductors 1, 2, 3.</p> |
