| 摘要 |
<p>A switchboard (1) of a low-voltage or medium-voltage switching installation has a first equipment unit (5), which is intended for main circuits, and a further equipment unit (7), which is arranged above the first equipment unit (5) and is intended for auxiliary circuits. Any excessive heating of the further equipment unit (7) is avoided by means of an angled air channel (15) through which air is conveyed, by means of a fan (22), from the top (17) of the switchboard (1) to its front (21). The air channel (15), which is formed by additional walls (13, 14), can be designed as a prefabricated assembly (30, 31, 32). <IMAGE></p> |
