Pre-tensioned wire is used for connecting fittings on overhead power transmission lines, as well as for the termination, suspension, and joints of overhead optical cables. Pre-tensioned wire first appeared in the United States in the 1940s and 1950s, initially as spiral protective strips used to protect bare conductors at stress concentration points and against electrical corrosion and arc burn. Over the years, pre-tensioned wire fittings have been widely used in power transmission and distribution, optical communication, electrified railways, cable television, construction, agriculture, and other fields. Steel-core aluminum conductors are the mainstream conductors widely used in 10 kV distribution network lines, boasting high tensile strength, good lightning protection, and low cost. They are extensively applied in suburban junctions and rural power lines. However, once steel-core aluminum conductor lines are damaged by external forces or adverse weather conditions, they are prone to mixed connection short-circuit faults. After a mixed connection short-circuit occurs, the conductors may exhibit broken strand phenomena. In such cases, timely and appropriate conductor repair treatment must be provided to prevent further degradation of the conductors' mechanical and electrical properties.