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● 在空气中敷设
1、单芯电缆平行敷设时中心距离:185mm2 及以下为电缆
直径的2 倍:240mm2 及以上 为90mm。
2、周围环境空气温度:40℃ JFEYH15KV高压电机引接线
3、导体的长期*高工作温度:70℃
● 直埋敷设
1、单芯电缆不接触敷设时电缆中心距离为电缆直径的2 倍。
2、土壤温度:25℃。JFEYH15KV高压电机引接线
3、导体的长期*高工作温度:70℃。
4、土壤热阻系数:1.0℃ .m/W
5、直埋深度:0.7m
● In air JFEYH15KV高压电机引接线
1.The single-core cables are parallel laid,the distance between
the cable center is 2 times of the cable diameter for cross-section
area of conductor ≤ 185mm2and 90 mm for corss-section area of
conductor ≥ 240mm2.
2.Ambient air temperature:40℃
3.Max. Contionous operating temperature of conductor:70℃ .
● Direct in the groud
1.The single-core cable are installed separtely,the distance between
the cable center is 2 times of the cable diameter.
2.Soil temperature:25℃ .
3.Max.contionous operationg temperature of conductor:70℃ .
4.Thermal resistivity of soil:1.0℃ .m/W.
5.Depth of laying:0.7m.
电缆敷设运行条件 Installation and Operation Condition of Cable
不同环境温度下载流量的修正系数 Current rating factors for variation in ambient air temperatare
不同土壤温度下载流量的修正系数 Current rating for variation in soil temperatare
环境空气温度
Ambient air temperature
20℃ 25℃ 30℃ 35℃ 40℃ 45℃
修正系数
Rating factor
1.29 1.22 1.15 1.08 1.00 0.91
土壤温度
Soil temperature
20℃ 25℃ 30℃ 35℃ 40℃
修正系数
Rating factor
1.04 1.00 0.96 0.92 0.87