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Cable crossings-derating considerations. II. Example of derivation of derating curves

机译:电缆交叉口的考虑因素。二。降额曲线推导示例

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For pt.I see ibid., vol.14, no.3, p.705-14 (1999). Cables crossing other heat sources either perpendicularly or at oblique angles will experience a rise in conductor temperature which should result in ampacity derating. In the first part of the paper a mathematical model for calculation of derating factors was presented. In this paper, a practical numerical example is considered with a 138 kV pipe-type cable crossing a 10 kV distribution circuit. The numerical analysis presented confirms experimental findings reported in the literature that the cable crossing may elevate conductor temperature by as much as 20/spl deg/C.
机译:关于第一部分,见同上,第14卷第3期,第705-14页(1999年)。与其他热源垂直或倾斜交叉的电缆会导致导体温度升高,从而导致载流量降低。在本文的第一部分中,提出了用于计算降额因子的数学模型。在本文中,将考虑一个138 kV管式电缆穿过10 kV配电线路的实际数值示例。提出的数值分析证实了文献中报道的实验发现,即电缆交叉可能会使导体温度升高多达20 / spl deg / C。

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