Title :
Failures/solutions in on-load tap-changers, 145 kV
Author :
Martins, H.J.A. ; Duque, J.A. ; Cerqueira, W. ; Domingues, L.A. ; Chaves, J.A. ; Braga, M.
Author_Institution :
Electr. Power Res. Center, CEPEL, Rio de Janeiro, Brazil
Abstract :
This paper describes some lines of investigation adopted to determine failure causes in on-load tap-changers 145 kV/400 A, connected to the transformer windings working in delta. Some results, the final report conclusions related to failure causes and recommendations for avoiding the risks of new failures are shown
Keywords :
failure analysis; power transformer insulation; power transformer testing; transformer oil; transformer windings; 145 kV; 400 A; dessicant breathers; failure; insulating oil quality; on-load tap-changers; transformer windings; Copper; Electrodes; Lubricating oils; Moisture; Oil insulation; Oxidation; Petroleum; Shafts; Surface cleaning; Testing;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.704644
