Transformer Lab

Sediment and Sludge (ASTM D 473)

Sediment is any substance which is insoluble after dilution of the oil with organic solvent (n-heptane). Precipitable sludge is oil deterioration products or contaminants. Sediment and sludge are insoluble after dilution of the oil with organic solvent (n-heptane) under prescribed conditions. Both sediment and sludge insoluble in the solvent mixture (alcohol, toluene and acetone)

Color and Appearance (IEC 60296)

This test method covers the visual determination of the color and appearance of a wide variety of petroleum products.Color and Appearance shall be evaluated by examining a representative sample of the oil in transmitted light under a thickness of approximately 10 cm and at ambient temperature. The result indicated the sediment by visual.

Dielectric Dissipation Factor and Resistivity @ 90 ºC (IEC 60247)

These tests measure the leakage current through oil. This is a measure of the degree of deterioration or contamination of that oil by soluble polar products and/or ageing products/colloids (resulting from oxidation of the oil it self or from the solution in the oil of external contaminants or materials used in the construction of the […]

Furan Analysis (IEC 61198 Modified)

As the cellulose insulation breaks down, one of the by-products which dissolves in the oil are Furans. We look at the five distinct furans 2-furfural (2FAL), 2-furfurylalcohol (2FOL), 2-acetyl furan (2ACF), 5-methyl-2-furfural (2MEF) and 5-hydroxymethyl-2-furfural (2HMF). Together with Dissolved Gas Analysis this analysis gives a very good guide to cellulose Insulation Degradation, which will tell […]

Dissolved Gas Analysis (DGA) (IEC – 60567, IEC – 60599 and IEEE C57.104-1991)

This test uses the total gas extraction method and can indicate degree of cellulose insulation degradation and any incipient (initial) fault that may be occurring in the transformer. Gases that will be analyzed: Hydrogen, Oxygen, Carbon Monoxide, Carbon Dioxide, Methane, Ethane, Ethylene, Acetylene, including percent gas by volume and combustible gases, also we give you […]