| 摘要 |
<p>The invention relates to an apparatus in a ballast or transformer for improving its cooling. The ballast or transformer comprises a core sheet pack (1, 2), a winding (6), whose ends extend beyond the core sheet pack, a shell (4) which surrounds the core sheet pack, and a bottom plate (3), to whose side edges (3a) the shell edges (4a) are fastened. Metal plates (5) leaning against the end of winding (6) are fastened to the gables of a housing made up by shell (4) and bottom plate (3). Between the end of winding (6) and said metal plate (5) is arranged a thin insulating layer.</p> |
