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发明公开
CN104008792A 一种新型中压耐火电缆及其生产工艺 有权

一种新型中压耐火电缆及其生产工艺
摘要：
本发明公开一种新型中压耐火电缆及其生产工艺，由内至外依次为缆芯、绑扎带、隔温降温层和挡火层；所述缆芯由三根绝缘线芯和三根填充加强件绞合而成圆形结构；所述绝缘线芯由内至外依次为导体、导体屏蔽、绝缘、绝缘屏蔽和金属屏蔽；所述隔温降温层的材料的配方按重量百分比为：EVA：20~30%、LLDPE塑料：8~15%、AL(OH)3：40~50%、Mg(OH)2：20~30%、其它：2~5%。本发明电缆能在火灾发生过程中可安全稳定实现中压额定电压的电力传输。
摘要（英）：

The invention discloses a novel medium-voltage fire-resistant cable and a production process thereof. The novel medium-voltage fire-resistant cable comprises a cable core, a bonding tape, a temperature isolating and reducing layer and a fire resisting layer in sequence from inside to outside. The cable core is of a circular structure which is formed by twisting three insulated wire cores and three filling reinforcement members. Each insulated wire core sequentially comprises a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer and a metal shielding layer from inside to outside. The material formula of the temperature isolating and reducing layer includes the following materials by weight: 20-30% of EVA, 8-15% of LLDPE plastics, 40-50% of Al(OH)3, 20-30% of Mg(OH)2, and 2-5% of other materials. By adopting the novel cable of the invention, safe and reliable power transmission in a rated medium voltage during a fire can be realized.

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