Реферат

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. This guide is classified into the following categories: sampling practices, physical tests, electrical tests, chemical tests, and specifications. The test methods shall be as follows: aniline point; coefficient of thermal expansion; color; examination; flash and fire point; interfacial tension; pour point of petroleum products; refractive index; relative density; specific heat; thermal conductivity; turbidity; viscosity; dielectric breakdown voltage; dissipation factor and relative permittivity; gassing tendency; resistivity; stability under electrical discharge; acidity; carbon-type composition; compatibility with construction material; copper content; furanic compounds; gas analysis; gas content; inorganic chlorides and sulfates; neutralization numbers; oxidation inhibitor content; oxidation stability; polychlorinated biphenyl content; sediment and soluble sludge; sulfur; water content; mineral insulating oil for electrical apparatus; and high firepoint electrical insulating oils.

Область применения

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 MethodSampling: 3D 923, D2759, D3305, D3613Physical Tests: Aniline Point4D 611Coefficient of Thermal Expansion5D 1903Color6D 1500Examination: Visual Infrared7D 1524, D2144Flash and Fire Point8D 92Interfacial Tension9D 971, D2285Pour Point of PetroleumProducts10D 97Refractive Index11D 1218, D1807Relative Density (SpecificGravity)12D 287, D 1217, D1298, D1481Specific Heat13D 2766Thermal Conductivity14D 2717Turbidity15D 6181Viscosity16D 88, D445, D2161Electrical Tests:Dielectric Breakdown Voltage17D 877, D1816, D3300Dissipation Factor and Rela-tive Permittivity (Dielectric Constant)18D 924Gassing Tendency19D 2300Resistivity20D 1169Stability Under Electrical Discharge21D 6180Chemical Tests:Acidity, Approximate22D 1534Carbon-Type Composition23D 2140Compatibility with Construction Material24D 3455Copper Content25D 3635Furanic Compounds26D 5837Gas Analysis27D 3612Gas Content28D 831, D1827, D2945Inorganic Chlorides and Sulfates29D 878Neutralization (Acid andBase) Numbers30D 664, D974Oxidation Inhibitor Content31D 2668, D4768Oxidation Stability32D 1934, D2112, D2440Polychlorinated BiphenylContent33D 4059Sediment and Soluble Sludge34D 1698Sulfur, Corrosive35D 1275Water Content36D 1533Specification:Mineral Insulating Oil forElectrical Apparatus37D 3487High 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.