Study on Temperature Rise Characteristics of Insulation Jumper Clamp for 10kV Distribution Line

Abstract

It is of great importance that insulated jumper clips are used to transfer current during live-ling work on 10kV distribution lines to ensure the safety of live workers. To this end, a 1:1 simulation model of the 2756/SJ1503 insulated jumper clip is established and the temperature rise of the insulated jumper clip is simulated using the electric-thermal-force multi-physical field coupling method. The validity of the model is verified through experiments to analyze the effect of wire clamps on the temperature distribution of wire clamps in terms of contact pressure, ambient temperature, light intensity, wind speed, and wire load capacity. Calculation results show that for every 5MPa increase in contact pressure between the line clip and the wire, the contact loss of the contact surface decreases by 0.07kW/m2 on average. Light intensity is one of the main factors affecting the temperature rise of insulated jumper clips, light intensity per 200W/m2, the average temperature rise of the clips rose 3K. The ambient temperature factor has less influence on the temperature rise of the clamps. The increase in wind speed has a catalytic effect on the heat dissipation of insulated jumper clips. With the increase of the wire carrying capacity, the temperature of the wire clip shows an exponential form of growth, the current density of the wire clip and the wire contact surface is distributed at both ends of the contact surface, and the current density at both ends is uniformly distributed.