P0400ZG - FOXBORO

发布时间:2020-06-12

P0400ZG - FOXBORO

 国内有很多制造变频电缆的工厂,经验丰富,品种规格具全,足以满足国内需求。过去也有很多公开发表的文献,所以本文不必再重复叙述。只是提出三条原则:①低压变频电缆的结构设计对称化,对于小功率电机,可用3芯成缆后加屏;对于大功率电机,可用3大3小绝缘导体,对称排列成缆,*加屏。②中压变频电缆的结构设计同轴化。③任何屏蔽层的截面,应满足用户提出的*小规定,如果铜带截面尺寸不够,可稀疏缠绕铜线,达到要求的导体面积。图1~图3为三种变频电缆的示意图。由于六芯电缆中3个小绝缘芯的导体截面之和,与4芯电缆中第4绝缘芯的导体截面相等,而六芯对称型成缆直径比四芯成缆直径略小,因此电缆成本基本相等。

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