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1.1 This guide describes methods of testing and specifications for electrical insulating oils of petroleum origin intended for use in electrical cables, transformers, oil circuit breakers, and other electrical apparatus where the oils are used as insulating, or heat transfer media, or both.

1.2 The purpose of this guide is to outline the applicability of the available test methods. Where more than one is available for measuring a given property, their relative advantages are described, along with an indication of laboratory convenience, precision, (95 % confidence limits), and applicability to specific types of electrical insulating oils.

1.3 This guide is classified into the following categories: Sampling Practices, Physical Tests, Electrical Tests, Chemical Tests, and Specifications. Within each test category, the test methods are listed alphabetically by property measured. A list of standards follows:

CategorySectionASTM Method
Sampling: 3D 923, D2759, D3305, D3613
Physical Tests:
Aniline Point4D 611
Coefficient of Thermal Expansion5D 1903
Color6D 1500
Examination: Visual Infrared7D 1524, D2144
Flash and Fire Point8D 92
Interfacial Tension9D 971, D2285
Pour Point of PetroleumProducts10D 97
Refractive Index11D 1218, D1807
Relative Density (SpecificGravity)12D 287, D 1217, D1298, D1481
Specific Heat13D 2766
Thermal Conductivity14D 2717
Turbidity15D 6181
Viscosity16D 88, D445, D2161
Electrical Tests:
Dielectric Breakdown Voltage17D 877, D1816, D3300
Dissipation Factor and Rela-tive Permittivity (Dielectric Constant)18D 924
Gassing Tendency19D 2300
Resistivity20D 1169
Stability Under Electrical Discharge21D 6180
Chemical Tests:
Acidity, Approximate22D 1534
Carbon-Type Composition23D 2140
Compatibility with Construction Material24D 3455
Copper Content25D 3635
Furanic Compounds26D 5837
Gas Analysis27D 3612
Gas Content28D 831, D1827, D2945
Inorganic Chlorides and Sulfates29D 878
Neutralization (Acid andBase) Numbers30D 664, D974
Oxidation Inhibitor Content31D 2668, D4768
Oxidation Stability32D 1934, D2112, D2440
Polychlorinated BiphenylContent33D 4059
Sediment and Soluble Sludge34D 1698
Sulfur, Corrosive35D 1275
Water Content36D 1533
Specification:
Mineral Insulating Oil forElectrical Apparatus37D 3487
High Firepoint Electrical Insulating Oils38D 5222

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Product Details

Published:
10/10/2002
Number of Pages:
14
File Size:
1 file , 100 KB
Redline File Size:
2 files , 200 KB