The high voltage end of the utility model is made on the circular conductor by the voltage level, and the insulation layer is 1 and conductor shielding; 2 and a thick insulating layer; 3, a grounding shielding layer; 4, an insulating sheath. On the insulating layer by the ladder orderly stress layer, each stress layer has a separate insulating layer, finally a stress layer with grounding shielding layer connection, because the insulating layer (2) thick and conductor distance conductor induction voltage to the first stress layer (4) voltage comparison after each layer should be small, the strength of induced voltage is very small, and the insulating layer inside the layer induced absorption and transferred to the ground shielding layer, directly reduce the end surface potential, each stress layer has a separate insulating layer, each additional stress layer end insulation with the end of the increase, the surface potential is very low, absolutely not to discharge.
【技术实现步骤摘要】
本技术高电压端头适合在电力系统高压电缆、高压电器设备的套管、穿墙套管、电流互感器中使用,大幅提高安全系数。
技术介绍
1、现有高压电缆头的应力锥、应力件、应力层、介电层跟导体属一个整体,跟导体的电压是一致的,沿面场强分布不均造成电缆端部绝缘层过早老化,经常有高压电缆头爆炸,另外端部表面电位很高,容易造成对地放电,时有污闪。2、现有套管制造技术都是采用电容芯子结构,其缺陷根据额定电压η个电容屏与η个绝缘层(每个绝缘层都很薄)叠加在一起形成一个绝缘体,每层绝缘都很薄。导体与第一个电容屏之间的绝缘不能满足额定运行电压,导体至第一个电容屏绝缘很薄,导体至第一个电容屏的距离很小,每个电容屏都很长端部至端部连成一体,感应出来的电容容量都很大,电压很高,到最后一层接地层电压也很高,只要其中一层绝缘受损主绝缘马上给击穿,此结构跟电力电容相当,长期在充放电,损坏率相当高,而且端部表面电位很高,容易造成对地放电,时有污闪。3、现有另一种电缆头的制造方法,导体端部与等位体与等位线与第一金属电容屏是相连通的,导体与第一金属电容屏是等电位,电压很高,第一金属屏与第二金属电容屏之间的绝缘层 ...
【技术保护点】
1.高电压端头,其特征:在圆形导体端部绝缘层里的第一个应力层(4)与导体(1)之间绝缘层(2)的绝缘水平能满足额定运行电压要求,在第一个应力层后面做n个应力层,应力层之间有绝缘层,最外层的应力层与接地屏蔽层(3)连接,高电压端头外表有绝缘护套(9)。
【技术特征摘要】
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