Title (en)

High voltage transformer and method.

Title (de)

Hochspannungstransformator und Verfahren zur Herstellung.

Title (fr)

Transformateur à haute tension et son procédé de fabrication.

Publication

EP 0191694 A1 19860820 (EN)

Application

EP 86400241 A 19860205

Priority

US 69962485 A 19850208

Abstract (en)

A high voltage transformer includes a gas permeable crepe paper envelope (15, 27) wrapped around the transformer windings (5, 7, 21). The windings and crepe paper envelope are encapsulated in a gas impermeable material (31) using standard resin casting techniques and then impregnated with gaseous SF6 (35) which is a self-healing dielectric gas. The crepe paper envelope prevents the resin coating material from penetrating the windings, thus allowing better diffusion and contact of the dielectric gas with the windings.

IPC 1-7

H01F 41/12

IPC 8 full level

H01F 41/12 (2006.01)

CPC (source: EP)

H01F 41/127 (2013.01)

Citation (search report)

• [Y] US 3233311 A 19660208 - GIEGERICH BERTRAND V, et al
• [A] US 3868766 A 19750304 - GRAMLICH DONALD L, et al
• [A] GB 778149 A 19570703 - MOSER GLASER & CO AG
• [A] US 2893061 A 19590707 - TERRY JR WILLIAM M
• [A] US 3905001 A 19750909 - SATO KOHEI, et al
• [A] DE 1072748 B
• [Y] PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 292 (E-219) [1437], 27th December 1983; & JP - A - 58 166 704 (HITACHI SEISAKUSHO K.K.) 01-10-1983
• [A] PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 13 (E-153) [1158], 19th January 1983; & JP - A - 57 170 509 (TOKYO SHIBAURA DENKI K.K.) 20-10-1982

Designated contracting state (EPC)

BE CH DE FR GB LI NL

DOCDB simple family (publication)

EP 0191694 A1 19860820; JP S61245509 A 19861031

DOCDB simple family (application)

EP 86400241 A 19860205; JP 2564586 A 19860207