What are the characteristics of transformer oil

Transformer oil | Investigations

The CS100 Corrosive Sulfur Kit is a real alternative to expensive laboratory tests for the determination of corrosive copper sulphide deposits. Such deposits lead time and again to a number of errors and thus to transformer failures. In most cases, deposits of copper sulphide cannot be seen during normal inspections. The copper wire would have to be unwound and the paper de-oiled to see the shiny deposits. The copper conductor is usually dark or brightly colored and the discoloration can vary significantly over the entire length of a conductor. Up until now there was only the possibility of detecting corrosive sulfur in the oil by means of expensive laboratory tests.

Sulfur can be found in transformer oil in different forms and compounds. Copper sulfides can appear with very different looks. As a result, it appears that it is extremely credible that countless malfunctions in transformers and reactors can be traced back to undetected copper sulfides. The portable CS100 Corrosive Sulfur Kit enables a quick and therefore cost-effective test. Copper Corrosion Tests - Comparison Tables (Procedure based on ASTM D1275 Method B

IEC 62535 - usually so-called CCD test. - Test method: accelerated oxidation at high temperature on copper conductors wrapped in kraft paper, visual assessment (former Cigre A2.32.TF01 method) Purpose: to determine the presence of corrosive sulfur compounds that could contaminate the cellulose of conductors with copper sulphide.

ASTM D1275, Procedure B - Test Method: Accelerated Oxidation at High Temperature on Electrolytic Copper Tape, visual assessment 48 hours at 150 ° C (Method A: 19 hours at 140 ° C) Purpose: to determine the presence of corrosive sulfur compounds that could contaminate copper surfaces .

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