Degradation (of performance) (from IEC Electropedia)
Note – The term “degradation” can apply to temporary or permanent failure. IEV ref. 161-01-19 [source]
Mineral insulating oil, natural esters, synthetic organic ester
insulating liquid derived from petroleum crudes
Note – Petroleum crude is a complex mixture of hydrocarbons with small amounts of other natural chemical substances.
IEV ref. 212-17-02 [source]
Natural esters (from IEC 62770)
vegetable oils obtained from seeds and oils obtained from other suitable biological materials and comprised of triglycerides
IEC 62770, ed. 1.0 (2013-11)
Synthetic organic ester (from IEC Electropedia)
insulating liquid produced from acids and alcohols by chemical reaction
Note – These esters include mono-, di- and polyol-esters.
IEV ref. 212-17-08 [source]
Reclaiming - regeneration, reconditioning - physical treatment
elimination of soluble and insoluble contaminants from an insulating liquid or gas by chemical adsorption means, in addition to mechanical means, in order to restore properties as close as possible to the original values or to the levels proposed in this standard
Published in: IEC 60480, ed. 2.0 (2004-10) – Reference number: 3.3.5 – Source: IEV 212-09-05 (modified) [source]
Reconditioning (from IEC Electropedia)
process that eliminates or reduces gases, water and solid particles and contaminants by physical processing only
Published in: IEC 60422, ed. 4.0 (2013-01) – Reference number: 3.5 [source]
Depolarization (from IEC Electropedia)
process of removing electrical polarization from an electrical insulating material until the depolarization current is negligible
NOTE Depolarization is generally recommended before measuring the resistive properties of an electrical insulating material.
Published in: IEC 62631-1, ed. 1.0 (2011-04) – Reference number: 3.12 [source]
