电缆敷设运行条件
·在空气中的敷设 In air
1.单芯电缆平行敷设时中心距离:185 mm2
及以下为电缆直径的2倍;240 mm2及以上为90mm.
2. 围环境空气温度:40℃。
3.导体的长期最高工作温度:90℃。
·The cingle-core cables are paralled laid , the distance between the cable center is 2 times of the cable diameter for cross-section of conductor<=185 mm2 and 90 mm for cross-section of conductor >=240 mm2
2. Ambient air temperture :40℃
3. Max. continous operating wemperature of conductor: 90℃。
不同环境温度下载流量的修正系数:
Current rating factors for variation in ambient air temperature:
环境温度
Ambient temperature
|
20 ℃
|
25℃
|
30℃
|
35℃
|
40℃
|
45℃
|
修正系数
Rating factor
|
1.29
|
1.22
|
1.15
|
1.08
|
1.0
|
0.91
|
|