Exit Stress Of Suspension Clamp

ab cable suspension clamp As an important hardware in overhead transmission lines, its outlet stress directly affects the safety of line operation. abc suspension clamp The stress concentration phenomenon of the conductor at the outlet is due to the sudden change of the mechanical properties of the conductor and j hook suspension clamp The contact part. When the conductor generates alternating loads under wind vibration, dancing or temperature changes, the area is prone to micro-wear and fatigue cracks, which may lead to conductor strand breakage accidents in severe cases. In a 750kV transmission line project, the XGU-5 type suspension clamp for ab cable JL/G1A-630/45 steel-core aluminum stranded wire was used. Three years after the commissioning, 12% of the conductor cross-sectional area at the suspension clamp for abc cable outlet broke. After testing, it was found that the maximum stress value reached 189MPa, which exceeded the design allowable value by 17%.
suspension clamp for lt ab cable The outlet stress distribution is affected by multiple factors. The relationship between the axial tensile stress σ_t generated by the conductor tension and the conductor cross-sectional area A can be expressed as σ_t=F/A. When the conductor sag changes and the tension increases by 20%, the suspension clamp outlet stress increase can reach 28%.