EP 3460810 A1 20190327 - ADVANCED HIGH VOLTAGE CAPACITANCE GRADED BUSHING
Title (en)
ADVANCED HIGH VOLTAGE CAPACITANCE GRADED BUSHING
Title (de)
FORTSCHRITTLICHER HOCHSPANNUNGSDURCHFÜHRUNGSISOLATOR MIT KAPAZITÄTSGRADIENTEN
Title (fr)
BAGUE HAUTE TENSION À GRADIENT DE CAPACITÉ AMÉLIORÉE
Publication
Application
Priority
IT 201700105778 A 20170921
Abstract (en)
This is a method for manufacturing a capacitance graded core for a high voltage electrical bushing, the capacitance graded core comprising: an elongated electrical conductor; an electrically insulating body disposed around the elongated electrical conductor; and a plurality of electrodes disposed coaxially to the elongated electrical conductor in the electrically insulating body. The method comprises: a) providing an insulating pre-impregnated fabric made of insulating fibers impregnated with an insulating thermoplastic material, the pre-impregnated fabric having a surface; b) heating the pre-impregnated fabric to melt the thermoplastic material of the pre-impregnated fabric; c) winding the melted pre-impregnated fabric around the elongated conductor while pressing the melted pre-impregnated fabric on the elongated conductor. The method further comprises forming an electrically conductive layer on the surface of the insulating pre-impregnated fabric, this step being repeated intermittently, thereby obtaining a plurality of electrically conductive layers inserted between the windings of pre-impregnated fabric and thus forming the plurality of electrodes.
IPC 8 full level
H01B 3/50 (2006.01); H01B 7/02 (2006.01); H01B 13/32 (2006.01); H01B 17/28 (2006.01); H01B 19/00 (2006.01)
CPC (source: EP)
H01B 3/50 (2013.01); H01B 17/28 (2013.01); H01B 19/00 (2013.01)
Citation (search report)
- [XA] WO 2015117823 A1 20150813 - ABB TECHNOLOGY LTD [CH]
- [A] EP 2911255 A1 20150826 - ABB TECHNOLOGY LTD [CH]
- [A] WO 2014090677 A1 20140619 - ABB TECHNOLOGY LTD [CH]
- [A] US 3983289 A 19760928 - NISHIZAKI SYUNICHIRO, et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3460810 A1 20190327; EP 3460810 B1 20200819; IT 201700105778 A1 20190321
DOCDB simple family (application)
EP 18193147 A 20180907; IT 201700105778 A 20170921