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Cable conductor temperature is an important parameter to determine the cable ampacity. On the other hand, the surrounding condition has a tremendous influence on cable conductor temperature. In order to improve the operating current of cable, this article derivates the calculation formulae for the ampacity of single-core AC cable laid in water, by analyzing the operating current characteristics of...
Calculation of temperature field of power cables is meaningful to make full use of cables' transmission capacity and improve its economy under the condition of ensuring the reliability and service life of cables. IEC 60287 standard has given a formula of cables' core conductor temperature and ampacity based on temperature field analysis. A fast solution to conductor temperature according to the temperature...
In this paper, the mathematical relationship between thermal conductivity and core temperature is theoretically given by studying the equivalent thermal circuit of 110kV power cable. It shows that core temperature is sensitive to change of the air gap's thermal conductivity. Finally the effects on core temperature of cable by the thermal conductivity of air gap layer is verified by the finite element...
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