公开(公告)号：US3896406A

公开(公告)日：1975-07-22

申请号：US49511274

申请日：1974-08-06

Applicant: ASEA AB

Inventor： ANDERSSON OLLE ,  ERICSSON ELLERTH

IPC: H01F27/245 ,  H01F27/36 ,  H01F15/04

CPC classification number: H01F27/245 ,  H01F27/36

Abstract: In order to prevent the occurrence of glow discharge at sharp corners and edges of core legs for transformers, reactors and the like which are formed of a plurality of sheets, tape is wound around the bundle of sheets, the tape being formed of a backing of glass fiber or the like having high mechanical strength and impregnated with an electrically semi-conducting and thermosetting material, the successive turns of tape overlapping, the winding being under high tension, the screen after heat treatment and curing being quite stiff and having good mechanical and electrical contact with the core leg along its longitudinal edges.

公开(公告)号：US3911384A

公开(公告)日：1975-10-07

申请号：US48092974

申请日：1974-06-19

Applicant: ASEA AB

Inventor： ANDERSSON OLLE ,  ERICSSON ELLERTH ,  FORSBERG SVANTE

IPC: H01B17/62 ,  H01F27/32 ,  H01F41/00 ,  H01F27/34 ,  H01B17/44

CPC classification number: H01F27/324 ,  H01B17/62 ,  H01F41/005

Abstract: For increasing the dielectric strength in metal electrodes, particularly in parts of the electrodes around which there prevail inhomogeneous electrical fields with uncontrollable electrical field strength, a layer of resin with a dielectric constant which is high in comparison with the dielectric constant of transformer oil is applied to the electrode by means of electrostatic spraying.

Abstract translation: 为了增加金属电极中的电介质强度，特别是在不稳定电场强度不均匀的电场周围的电极部分中，施加与变压器油的介电常数相比高的介电常数的树脂层 通过静电喷涂到电极。