Title :
Multistress aging of high voltage stator bars
Author :
Sheehy, R.C. ; Blackburn, T.R. ; Rungis, J.
Author_Institution :
Sch. of Electr. Eng., New South Wales Univ., Kensington, NSW, Australia
Abstract :
This paper discusses a multi-stress aging test rig for the purpose of accelerated life tests of high voltage stator bars. The test rig employs electrical, mechanical, thermal and frequency aging at 500 Hz to replicate the operating stresses commonly found in high voltage rotating machines. New stator bars are used in the rig to allow the tracking of aging events from initial, non-stressed, values. Partial discharge analysis is used as the primary indication of aging phenomena. The new stator bars will be aged for a period of greater than one year, and, as a result, only preliminary measurements are presented
Keywords :
ageing; asynchronous machines; insulation testing; life testing; machine insulation; machine testing; partial discharges; stators; 1 MVA; 11 kV; 500 Hz; accelerated life tests; electrical aging; electrical insulation; frequency aging; high voltage rotating machines; high voltage stator bars; induction machine; laboratory aging tests; mechanical aging; multistress aging test rig; operating stresses; partial discharge analysis; statistical analysis; thermal aging; Accelerated aging; Frequency; Life estimation; Life testing; Partial discharge measurement; Partial discharges; Rotating machines; Stator bars; Thermal stresses; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414126
