公开(公告)号：EP1236211A1

公开(公告)日：2002-09-04

申请号：EP00982456.6

申请日：2000-12-07

申请人： ABB POWER T & D COMPANY INC.

发明人： SZ SZ, Paul ,  REISS, Harold ,  BALDWIN, Thomas, L. ,  RAMANAN, W., R. ,  BONMANN, Dietrich

IPC分类号： H01F27/08 ,  H01F27/30 ,  H01F7/00

CPC分类号： H01F36/00 ,  Y02E40/66

摘要： A cryostat for superconducting transformers is provided which includes an electrically non-conducting load bearing thermal insulation that is adapted for use with a superconducting transformer. The cryostat (10) also prevents the formation of closed loop stray currents on its outer case. The cryostat contains the winding sets (30) and other related electrical equipment of 3-phase electrical transformer as tap changer (28) and electrical leads (29). The cryostat with lid (14) generally comprises a heat insulated cryogenic tank having an outer wall (18), electrically non-conducting liner (22), and load bearing thermal insulation layer (20) disposed therebetween. The tank holds liquid or gaseous cryogenic coolant (34) into which transformer components are immersed, thereby reducing electrical resistance losses or wire losses and magnetic hysteresis losses or core losses. A plurality of passages allow the passage of the limbs or legs (36) from iron core (32) of the transformer through the cryogenic tank.