EP 0387994 A3 19920108 - HIGH TEMPERATURE TRANSFORMERS
Title (en)
HIGH TEMPERATURE TRANSFORMERS
Publication
Application
Priority
GB 8905972 A 19890315
Abstract (en)
[origin: EP0387994A2] A transformer whose windings are insulated with cellulose-based materials and are immersed in a carboxylic ester liquid, the liquid and the load capacity rating of the transformer being such that the normal winding hot-spot temperature is in the range 110 DEG C to 130 DEG C, preferably in the region of 130 DEG C, and thus substatially hotter than 98 DEG C.
IPC 1-7
IPC 8 full level
H01B 3/32 (2006.01); H01F 27/32 (2006.01)
CPC (source: EP)
H01B 3/32 (2013.01); H01F 27/321 (2013.01)
Citation (search report)
- [X] DE 2838482 A1 19800320 - MICANITE & INSULATORS CO LTD
- [A] US 3413404 A 19681126 - MACFADYEN KENNETH W, et al
- [AD] GB 1602092 A 19811104 - MICANITE & INSULATORS CO LTD
Designated contracting state (EPC)
BE DE FR IT
DOCDB simple family (publication)
EP 0387994 A2 19900919; EP 0387994 A3 19920108; GB 2229583 A 19900926; GB 8905972 D0 19890426; GB 9002744 D0 19900404
DOCDB simple family (application)
EP 90301261 A 19900207; GB 8905972 A 19890315; GB 9002744 A 19900207