Electrostatic charging tendency of aged transformer oils
- CSIRO, Lindfield (Australia)
The accumulated data on Electrostatic Charging Tendency (ECT) in transformer oils is still not sufficiently large to make it clear if it can be used as a diagnostic method of reasonable reliability. In this work at CSIRO in Australia, the ECT levels of various new and aged transformer oils were measured with spinning disc apparatus (SDA) and with a filter method using the rapid charge tester (RCT). The SDA was adapted from the CIGRE design. The measured levels of both leakage current (SDA) and charge density (RCT) varied with oil type and condition. They were less distinct for new oils, however, clear differentiation appeared for aged oils. The results showed that both instruments can discriminate ECT levels in transformer oils and that these levels could be used for diagnostic measurements of the oils. Some preliminary results are presented for ECT levels in oils aged in the laboratory.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 96474
- Report Number(s):
- EPRI-TR-105019; CONF-9409355-; TRN: 95:005146-0009
- Resource Relation:
- Conference: Static electrification in power transformers workshop, Milwaukee, WI (United States), 28-30 Sep 1994; Other Information: PBD: May 1995; Related Information: Is Part Of Static electrification in power transformers: Proceedings; PB: 369 p.
- Country of Publication:
- United States
- Language:
- English
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