公开(公告)号：US06201191B1

公开(公告)日：2001-03-13

申请号：US09069101

申请日：1998-04-29

申请人： Jun Yorita ,  Ryosuke Hata ,  Hiroshi Takigawa

发明人： Jun Yorita ,  Ryosuke Hata ,  Hiroshi Takigawa

IPC分类号： H01B700

CPC分类号： H01B9/0688

摘要： A solid DC cable is made of a conductor having multilayered insulating layer around the outer circumference of the conductor. The insulating layer has a layering configuration selected from one of the following arrangements: (i) a main insulating layer and a low resistance tape layer, where the low-resistance tape layer contains carbon paper that has a volume resistivity which is smaller than that of the main insulating layer; (ii) a main insulating layer containing kraft paper, and a low-resistance insulating layer containing a low resistance kraft paper having a resistivity smaller than the kraft paper of the main insulating layer; (iii) a main insulating layer containing a composite tape, where the tape is contains a laminate of a low-loss plastic film and kraft paper, and a low-resistance insulating layer containing kraft paper having a resistivity lower than the main insulating layer; or (iv) a low-resistance tape layer containing carbon paper described in (i), a low-resistance insulating layer containing the low-resistance kraft paper described in (ii) and a main insulating layer. The low-resistance insulating layer or the low-resistance tape layer is positioned above the conductor in a region where the pressure of the insulating oil becomes negative when a voltage load is cut off.

摘要翻译： 固体DC电缆由导体的外周围形成有多层绝缘层的导体制成。 绝缘层具有从以下配置之一中选择的层叠结构：（i）主绝缘层和低电阻带层，其中低电阻带层含有碳纸，其具有小于 主绝缘层; （ii）含有牛皮纸的主绝缘层和含有电阻率小于主绝缘层的牛皮纸的低电阻牛皮纸的低电阻绝缘层; （iii）包含复合带的主绝缘层，其中所述带包含低损耗塑料膜和牛皮纸的层压体，以及包含电阻率低于所述主绝缘层的牛皮纸的低电阻绝缘层; 或（iv）包含（i）中所述的含碳纸的低电阻带层，包含（ii）中描述的低电阻牛皮纸的低电阻绝缘层和主绝缘层。 当电压负载被切断时，低电阻绝缘层或低电阻带层位于导体上方的绝缘油的压力变为负的区域中。