Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.07c
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- Pages.1694-1696
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- 2001
Insulation Aging Properties of Off-Line and On-Line High Voltage Motor Stator
정지중 및 운전중 고압전동기 고정자 권선의 절연열화 특성
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Kim, Hee-Dong
(Korea Electric Power Research Institute)
;
- Lee, Young-Jun (Korea Electric Power Research Institute) ;
- Ju, Young-Ho (Korea Electric Power Research Institute)
- Published : 2001.07.18
Abstract
Partial discharge(PD) tests are used to evaluate the insulation condition of stator windings in six 6.6kV motors. These tests were conducted using a conventional partial discharge detector (PDD), turbine generator analyzer(TGA) and partial discharge analyzer(PDA). Off-line PD measurements were performed on six 6.6kV motors. PD magnitudes ranged from 740 pC to 5,100 pC at the normal line-to-ground voltage. Six 6.6kV motors have been equipped with eighteen 80pF epoxy-mica couplers(one per phase) on the motor terminal boxs. The PD pulse from sensors were measured with the TGA and PDA instruments on a normally operating motors. The PDD, TGA and PDA test results showed that internal discharge was detected in voids of the groundwall insulation.
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