On-line monitoring of tan delta for substation equipment
- CSIR, Pretoria (South Africa)
The ageing and deterioration of oil-paper insulation in high voltage equipment can result in explosions which are not only costly, but also put human lives at risk. Tan delta measurement is a well accepted method of monitoring the quality of insulation of bushings and current transformers in laboratories and on site. The use of tan delta measurement has been extended to on-line continuous measurement of equipment in service and a comparative method of analysis has been developed for selecting units with values that indicate potentially dangerous levels of degradation of the insulation. A cost effective PC based system that does not require the use of a standard high-voltage capacitor for taking measurements has been installed at two substations for in-service tests and further development.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States); Cambias and Associates, Covington, LA (United States)
- OSTI ID:
- 269639
- Report Number(s):
- EPRI-TR-105838; CONF-9411304-; TRN: 96:003582-0017
- Resource Relation:
- Conference: 3. substation equipment diagnostics conference, New Orleans, LA (United States), 1-3 Nov 1994; Other Information: PBD: Mar 1996; Related Information: Is Part Of Proceedings: Substation equipment diagnostics conference III. Proceedings; PB: 299 p.
- Country of Publication:
- United States
- Language:
- English
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