公开(公告)号：US20170301449A1

公开(公告)日：2017-10-19

申请号：US15586201

申请日：2017-05-03

Applicant: ABB Schweiz AG

Inventor： Adam Michalik ,  Patricia Ricketts ,  Massimo Carmignoto ,  Jayram Yadava ,  Roberto Zannol ,  Milijenko Hrkac ,  Allesandro Maltozzi ,  Claire Pitois ,  Emmanouil Logakis ,  Harald Martini ,  Ilario Scian ,  Orlando Girlandra ,  Rudi Velthuis ,  Spiros Tzavalas

IPC: H01F27/00 ,  H01F27/10 ,  H01F27/23 ,  H01F27/02 ,  H01F27/24 ,  H01F27/28 ,  H02J3/18

CPC classification number: H01F27/006 ,  H01F27/008 ,  H01F27/025 ,  H01F27/10 ,  H01F27/12 ,  H01F27/23 ,  H01F27/24 ,  H01F27/28 ,  H01F27/303 ,  H01F27/322 ,  H01F27/323 ,  H01F30/12 ,  H01F2027/406

Abstract: An electrical transformer includes a coil pack including windings, and spacers axially spacing turns of the windings from one another and being formed of a thermoplastic material. Sticks couple and position the spacers. The coil pack has high resistivity to creep and permits temperature rise without degradation of transformer insulation, providing for extended service life and unique methods of transformer system upgrade.