Publication detail
| Reference | IEC 62535 ed1.0 |
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| Title | Versión Oficial en Español - Líquidos aislantes. Método de ensayo para la detección del azufre potencialmente corrosivo en aceite aislante usado y nuevo. | |||||||||
| Publication date | 2008-10-08 | |||||||||
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| Abstract | IEC 62535:2008 specifies a test method for detection of potentially corrosive sulphur in used and unused mineral insulating oil. Most recent failures due to corrosive sulphur are related to the formation of copper sulphide deposits in and on the surface of winding cellulosic paper. The test method uses a copper conductor, wrapped with one layer of paper, immersed in the oil and heated to evaluate the capability of the oil to yield copper sulphide and transfer it to paper layers. The growth of copper sulphide on bare copper may cause the presence of conductive particulates in the oil, which can act as nuclei for electrical discharge and may lead to a fault. Other test methods exist using a bare copper strip immersed in oil and heated to detect the corrosive behaviour of oil against copper. ASTM D1275 Method B is also used for this test and a modified procedure using low oil volumes is included in Annex A. Tests with and without paper are considered as complementary and may lead to different results. | |||||||||
| Technical Committee | 10 - Fluids for electrotechnical applications
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| Stability date | 2015 | |||||||||
| Work in progress |
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