The Current Status of Conventional Conductor Fixing Technologies and Equipment Development for Distribution Network Overhead Lines

To address the difficulties caused by dense end nodes and restricted working spaces in elevated sections, this paper proposes a terminal fixing device with dual protection consisting of a screw clamp and an elastic rope, and establishes a torque-angle calibration procedure to achieve standardized tightening and self-locking. The results show that the technical solution proposed in this study reduces the single installation time from 12.4 minutes to 3.7 minutes, decreases the cycle time by 70%, and improves the reliability from 94.6 to 99.8. The tension fluctuation is controlled within the specified ±10 supervisory limit, and the temperature rise of the outer shell meets the requirements of the national standard.