Test Description

Method

Visual Examination of Electrical Insulating Oils

ASTM D 1524

Color, ASTM Color Scale

ASTM D 1500

Interfacial Tension of Oils by Ring Method

ASTM D 971

Viscosity, Kinematic, at 40ºC , cSt

ASTM D 445.a

Dielectric Breakdown Voltage, Disc Electrodes

ASTM D 877

Water Content by Karl Fischer, Insulating Liquids

ASTM D 1533

Dissolved Gasses in Electrical Insulating Oils by Gas Chromatography

ASTM D 3612

Acid Number, Color-Indicator Titration (TAN)

ASTM D 974.a

Corrosive Sulfur in Electrical Insulating Oil

ASTM D 1275

Oxidation Stability, Mineral Insulating Oils, RBOT

ASTM D 2112

Additional Optional Tests:

Aniline Point of Petroleum Products

ASTM D 611.a

Dielectric Breakdown Voltage, VDE Electrodes

ASTM D 1816

Dielectric Constant and Power Factor of Electrical Insulating Liquids, 60 Hz, 25 ° C

ASTM D 924

Viscosity, Kinematic, at 100 C, cSt

ASTM D 445.b

Viscosity, Kinematic, at 0 C, cSt

ASTM D 445.c

Oxidation Stability, Mineral Insulating Oil 72 hrs

ASTM D 2440.b

Oxidation Stability, Mineral Insulating Oil 164 hrs

ASTM D 2440.a

Oxidation Inhibitor in Insulating Oil by Infrared Absorption

ASTM D 2668

PCBs in Insulating Oil by Gas Chromatography

ASTM D 4059

PCBs in Transformer Insulating Oils by GC

EPA 600/4-81-045

PCB Content, Screening Test in Oil, ppm

TOL 5049

Sediment and Solid Sludge in Service-Aged Ins Oil

ASTM D 1698

Chloride, Inorganic, and Sulfate in Insulating Oil

ASTM D 878