公开(公告)号：US11573256B2

公开(公告)日：2023-02-07

申请号：US16715925

申请日：2019-12-16

Applicant: GE Aviation Systems Limited

Inventor： Peter James Handy ,  Benjamin Robert Daffurn ,  Frank Graham Osborne ,  Michael James Smith

IPC: G01R31/08 ,  H01F27/28 ,  H02H1/00 ,  H01F27/36 ,  H01F27/42

Abstract: A method and circuit for detecting a fault in a power transformer having an conductive shield layer sandwiched between electrical insulating layers separating the conductive shield layer from a first conductor and a second conductor, the second conductor opposite the conductive shield layer from the first conductor, and including, sensing a voltage energizing the shield layer, comparing the sensed voltage to a threshold voltage value corresponding to a fault, and upon satisfaction of the comparison, providing a fault indication when the comparison indicates the presence of a fault.