| 摘要 |
<p>PURPOSE:To make it possible to melt and remove snow and ice accretion on a power transmission line by eliminating waste in the quantity of heat by arranging heating elements separately at certain intervals instead of placing the heating elements throughout the whole length of power line. CONSTITUTION:A cross section of a spiral rod 5 at the position of a heating portion 5A comprises conductors 4a and 4b placed in parallel through an aluminum pipe 6 and a heating body 7 is filled around the conductors. A cross section at the position of non-heating portion 5B comprises conductors 4a and 4b inserted through an aluminum pipe 6 and the remaining space filled with insulating body 8, thereby creating an unheated portion. That is, heating portions 5a or non-heating portions 5B are arranged at random or at certain intervals in the spiral rod 5. Also, the total length of the built-in heating body is made almost a half of the total length of the spiral rod 5; a built-in portion of the heating body 7 is so wound that the heating body is always located on the upper half portion of a conductor 1. Thus, heating portion 5A is located at the upper half portion of conductor 1 and the non-heating portion 5B at the lower half portion in order to prevent snow and ice accretion on the conductor 1 with the highest efficiency.</p> |
