| 摘要 |
<p>PURPOSE:To make it possible to bundle power lines to a big diameter by inserting a perforated pipe into the core portion of a plurality of power lines bundled and supplying a cooling gas from this pipe. CONSTITUTION:At the core portion 1 of many power lines 1 bundled with a clamp 3, a wire net-shaped or a perforated pipe 2 is inserted for flowing cooling air, the cooling air moves from the perforated pipe 2 to gaps between many bundled power lines 1 and to the outside, and respective power lines 1 are cooled off by this cooling air. By doing this, the cooling air can be fully supplied to the heated internal power lines 1 by blowing the cooling air from the core portion of many bundled power lines 1.</p> |
