Testing Electrical Insulation Articles & Analysis
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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. ...
Furanic compounds are generated by the degradation of cellulosic materials used in the solid insulation systems of electrical equipment. Furanic compounds which are oil soluble to an appreciable degree will migrate into the insulating liquid. ...
This standard measures the steady state thermal impedance of electrical insulating materials used to enhance heat transfer in electrical and electronic applications. ...
This specification covers thermoplastic chlorinated polyethylene (CM) compounds suitable for use as an outer covering or jacket on electrical cables. Thermoplastic jackets shall conform to the requirements for physical properties specified. The sunlight and weather resistance of the jackets shall be tested to meet the ...
This specification covers crosslinked chlorinated polyethylene compounds intended for use as jacket materials (outer coverings) on electrical wires and cables for general-purpose, heavy-duty, and extra-heavy-duty service. ...
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 ...
Electrical equipment can fail as a result of electrical tracking of insulating material that is exposed to various contaminating environments and surface conditions. ...
Electrical insulation is effective in electrical equipment only as long as it retains its physical and electrical integrity. ...
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 of thermal endurance of rectangular and square fibrous- or film-wrapped magnet wire coated with an ...
TGA curves can, therefore, be used as a preliminary screen method in the evaluation of relative behavior of insulating materials of the same generic family. The functional temperature-life relationship of an insulating material in any given application depends on a number of service and environmental factors. ...
Materials covered by this specification are not sunlight and weather resistant unless they are carbon black pigmented or contain an additive system designed for this protection. Since the insulation cannot be tested unless it has been formed around a conductor, tests shall then be done on insulated wire solely to determine the ...
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 ...
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 ...
For this reason, codes and standards require cyclic proof testing of prototypes (for example, vessels) which are not a part of this practice. ...
Other requirements necessary to identify particular characteristics important to specific applications shall be described by using the suffixes as given in Section 5. 1.4 Acrylic molding and extrusion compounds are used frequently in applications where extreme clarity and the ability to retain that clarity and color under severe weathering and other environmental exposures are ...
The classes and grades in which these groups are subdivided are shown in this specification. The plastic shall be tested for deflection temperature, Izod impact, and solution viscosity. ...
This terminology covers each of the following disciplines: plastics (polymers), rubber (elastomers), and textiles (polymer derived). 1.5 An increasing number of product (polymeric, metallurgical, and ceramic ...
This test method covers the laboratory procedure that ascertains the quantity of suspensions in insulating oils of petroleum origin using a nephelometric measurement technique to determine the fluid's turbidity. ...
Electrical tests, properly interpreted, provide information with regard to the electrical properties of the insulation. The electrical test values give an indication as to how the insulation will perform under conditions ...
This specification, or parts thereof, shall be applicable to structural composite lumber portions of manufactured structural components. Tests shall be performed to determine the properties of the material in accordance to the following test methods: moisture content ...