testing electrical insulation News
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ASTM D1934 - 95(2012) Standard Test Method for Oxidative Aging of Electrical Insulating Petroleum Oils by Open-Beaker Method
Open-beaker oxidative aging methods have been used for many years in laboratories of oil companies, electrical equipment manufacturers, and electric utility companies interested in the stability of electrical insulating oils under oxidative conditions. They are particularly useful as a check on the continuity of production and shipment of insulating oils. They ...
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ASTM D4882 - 05(2012) Standard Test Method for Bond Strength of Electrical Insulating Varnishes by the Twisted-Coil Test
Values obtained by flexural test can provide information with regard to the bond strength of the particular varnish in combination with a particular type of magnet wire, when measured under conditions described in this test method. 1. Scope 1.1 This test method covers the determination of the bond strength of an electrical insulating varnish when applied to ...
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ASTM D2864 - 10e1 Standard Terminology Relating to Electrical Insulating Liquids and Gases
1. Scope 0 2. Referenced Documents (purchase separately) ASTM Standards D611 Test Methods for Aniline Point and Mixed Aniline Point of Petroleum Products and Hydrocarbon Solvents D2007 Test Method for Characteristic Groups in Rubber Extender and Processing Oils and Other Petroleum-Derived Oils by the Clay-Gel Absorption Chromatographic Method D2140 Practice for Calculating Carbon-Type ...
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ASTM D1830 - 99(2012) Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method
A major factor affecting the life of insulating materials is thermal degradation. Other factors, such as moisture and vibration, may cause failures after the material has been weakened by thermal degradation. Electrical insulation is effective in electrical equipment only as long as it retains its physical and electrical integrity. Thermal ...
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ASTM D4881 - 05(2012) Standard Test Method for Thermal Endurance of Varnished Fibrous- or Film-Wrapped Magnet Wire
Individual varnishes behave differently when applied to the same fibrous- or film-wrapped magnet wire when exposed to elevated temperatures. Likewise, a varnish does not always behave the same when applied to different types of fibrous or film-wrapped magnet wires and when exposed to elevated temperatures. 1. Scope 1.1 This test method covers the determination ...
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ASTM D5637 - 05(2012) Standard Test Method for Moisture Resistance of Electrical Insulating Varnishes
This test method is useful for the evaluation of insulating varnish performance in high humidity exposure. 1. Scope 1.1 This test method covers the mechanical performance of electrical insulating varnishes subjected to high humidity conditions. 1.2 The values stated in SI units are to be regarded as standard. 1.3 This standard does not purport to address all of the safety ...
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ASTM D3638 - 12 Standard Test Method for Comparative Tracking Index of Electrical Insulating Materials
Electrical equipment can fail as a result of electrical tracking of insulating material that is exposed to various contaminating environments and surface conditions. There are a number of ASTM and other tests designed to quantify behavior of materials, especially at relatively high voltages. This method is an accelerated test which at relatively low test voltages, provides a ...
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