Pre-twisted Wire Repair Method

armor rod preformed The repair process of damaged steel core aluminum conductors in 10kV lines is mainly carried out in accordance with the relevant provisions of the "Construction and Acceptance Specifications for Overhead Power Lines of 35kV and Below for Electrical Installation Engineering". According to the different degrees of damage to the conductors, the following repair processes are mainly used: No. 0 sandpaper grinding, winding repair, repair with repair pipe, and straight-line joint pipe joint. From the perspective of repair methods, the time for repairing conductors using 0# sandpaper grinding and winding treatment processes is relatively short. However, these two methods can only cover the repair of steel core aluminum conductors whose strength loss does not exceed 5% of the total breaking force and whose cross-sectional area damage does not exceed 7% of the total cross-sectional area of ​​the conductive part, which has considerable limitations. In reality, after a mixed short circuit occurs in steel core aluminum conductors, the damaged area of ​​the conductor is generally greater than 7%. For this reason, we have counted the total number of conductor repairs throughout the year. There were 15 faults in which the conductor damage area was greater than 7% in the year, accounting for about 60% of the total faults. The repair of conductors with a damage area greater than 7% mainly adopts repair with repair pipes and reconnection with straight joint pipes after sawing off. However, these two technologies have high requirements on tools and labor, and the construction process is relatively complicated, so the construction time is also relatively long.