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Longitudinal Protection from Moisture ingress

Tenderers are to include means of longitudinal protection to block moisture propagation longitudinally to the cable. The design and manufacturing shall be such so as the requirement of paragraph 19.22 of !EC 60502-2 is met and at the same time this insulation screen and copper wire screen are at an equipotential and the aluminium foil and copper-wire screen are at a galvanic contact. The use of swellable powder only shall not be accepted.

Radial Protection from moisture ingress

Tenderers are to include means for radial protection from moisture ingress. The protection shall be Aluminium foil tightly bonded to the PE sheath of minimum thickness of 0,2 mm and minimum overlap of 5 mm. Designs including foil as adding to the rating of Copper Wire screen shall not be accepted.

請問各位！上面是什么結(jié)構(gòu)？謝謝

縱向阻水保護：投標文件應包括防止水分向電纜縱向傳播的方法。電纜的設計和制造應符合IEC60502.2中19.22章要求，并且絕緣屏蔽和銅絲屏蔽應該是等電位，鋁箔和銅絲屏蔽應是連電導通的。不允許僅采用阻水粉的方法。

徑向阻水保護：投標文件應包括防止水分向電纜徑向傳播的方法。防護措施是，縱包鋁箔應與PE外護套緊密結(jié)合，且鋁箔厚度不小于0.2mm，縱包搭蓋寬度不小于5mm。（最后一句話不太明白）

12/20kV電纜的絕緣厚度是5.5mm，樓主的12/20kV電纜是用于水下的吧。

用鋁塑復合帶縱包結(jié)構(gòu)