电缆载流量计算 第12部分:载流量公式(100%负荷因数)和损耗计算 双回路平面排列电缆金属套涡流损耗因数
Electric cables - Calculation of the current rating - Part 12:Current rating equations (100% load factor) and calculation of losses - Sheath eddy current loss factors for two circuits in flat formation