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Specific Heat and Thermal Conductivity Measurement of XLPE Insulator and Semiconducting Materials

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4 Author(s)
Kyoung-Yong Lee ; Sch. of Electr., Electron. & Inf. Eng., Wonkwang Univ., Ihksan ; Jong-Seok Yang ; Yong-Sung Choi ; Dae-Hee Park

To improve mean-life and reliability of power cable, we have investigated specific heat and thermal conductivity of XLPE insulator and semiconducting materials in 154 kV XLPE cable. Specimens were respectively made of sheet form with EVA, EEA and EBA with carbon black 30 wt%, and the other was made of sheet form by cutting XLPE insulator in certain 154 kV power cable. Specific heat and thermal conductivity were measured by DSC (differential scanning calorimetry) and nanoflash diffusivity. Specific-heat measurement temperature ranges of XLPE insulator were from 20 to 90 , and the heating rate was 1/min. And the measurement temperatures of thermal conductivity were 25 ,55 and 90 . In case of semiconducting materials, the measurement temperature ranges of specific heat were from 20 to 60 , and the heating rate was 1/min. And the measurement temperatures of thermal conductivity were 25 and 55 . In addition we measured matrix of semiconducting materials to show formation and growth of carbon black in base resins through the SEM. From these experimental results, both specific heat and thermal conductivity were increased by heating rate because volume of materials was expanded according to rise in temperature

Published in:

Properties and applications of Dielectric Materials, 2006. 8th International Conference on

Date of Conference:

June 2006