公开(公告)号：EP1706879A1

公开(公告)日：2006-10-04

申请号：EP04809096.3

申请日：2004-12-17

申请人： ABB Technology Ltd

发明人： DRUGGE, Birger ,  MOOD, Johan ,  DOWLING, Kenneth ,  LAIHONEN, Sari ,  OLSSON, Carl-Olof ,  HOLMGREN, Tommy

IPC分类号： H01G4/224 ,  H01G4/30 ,  H01G4/38 ,  H01B17/50 ,  H01B17/54

CPC分类号： H01G4/38 ,  H01G2/08 ,  H01G4/224 ,  H01G4/385

摘要： A power capacitor comprising at least one capacitor element (2a-2d) enclosed in a container (1, 22-22c), wherein the container is of a material which substantially comprises a first polymer material. Further, the container is cylindri­cal and provided in its surface with creepage distance­extending protrusions (23-23e) of a second polymer material. The protrusions are formed with respect to their thickness and radial length so as to cool the capacitor. In a method for manufacturing such a power capacitor, a substantially cylindrical container is made of a material which substan­tially comprises a first polymer material. The container (1, 22-22c) is provided on its envelope surface with creepage distance-extending protrusions (23-23e) of a second polymer material and the capacitor elements are encapsulated in the container.