| 摘要 |
<p>PURPOSE:To prevent snow from staying on an over-head cable, even if it carries low-power current, by wrapping it with heating wire. CONSTITUTION:A thawing cable is constituted by winding a main heating wire 2, which heats and thaws show by the current of an over-head cable 1, and the bypass heating line 3 of low impedance on an over-head cable, and when the over-head cable carries a low power current, it heats the bypass heating wire of low impedance so as to thaw snow and drop it.</p> |
