EP 1485927 B1 20080716 - PRODUCTION OF HIGH OR MEDIUM VOLTAGE WINDINGS FOR OIL-IMMERSED TRANSFORMERS AND THE WINDINGS THUS PRODUCED
Title (en)
PRODUCTION OF HIGH OR MEDIUM VOLTAGE WINDINGS FOR OIL-IMMERSED TRANSFORMERS AND THE WINDINGS THUS PRODUCED
Title (de)
HERSTELLUNG VON HOCH- ODER MITTELSPANNUNGS WICKLUNGEN FÜR ÖLGEFÜLLTE TRANSFORMATOREN UND SOMIT HERGESTELLTE WICKLUNGEN
Title (fr)
REALISATION D'ENROULEMENTS "HAUTE OU MOYENNE TENSION" DE TRANSFORMATEURS IMMERGES, ET ENROULEMENTS AINSI REALISES
Publication
Application
Priority
EP 0203149 W 20020321
Abstract (en)
[origin: WO03094180A1] The invention relates to oil-immersed power or electric power distribution transformers for which the size of the high (or medium) voltage windings is to be reduced. The invention essentially consists in removing the normal oil paper that is used as a dielectric barrier which separates the layers of spirals of lead wire and replacing said paper with a structure comprising a stack of flat wafers which are formed by concentric axial layers of close spirals of coiled wire, without the insertion of a barrier therebetween, and which are obtained from a round or almost round enamelled wire which is sticky or at least heat-adhesive. Each of said wafers has a maximum height which is calculated according to the dimensions of the wire, the selected inter-spire voltage and the safety electric arcing prevention voltage gradient specific to the relevant transformer.
IPC 8 full level
H01F 27/32 (2006.01)
CPC (source: EP)
H01F 27/323 (2013.01); H01F 27/327 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03094180 A1 20031113; AT E401656 T1 20080815; AU 2002256695 A1 20031117; DE 60227710 D1 20080828; EP 1485927 A1 20041215; EP 1485927 B1 20080716; ES 2307747 T3 20081201
DOCDB simple family (application)
EP 0203149 W 20020321; AT 02726197 T 20020321; AU 2002256695 A 20020321; DE 60227710 T 20020321; EP 02726197 A 20020321; ES 02726197 T 20020321