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Abstract
This specification covers electrically insulating, unbleached sulfate paper and paperboard used as layer insulation in coils, transformers, and other similar apparatus. The materials may also be used as turn insulation, slot liners, wedges, phase insulation, and separator papers in stranded wire/cable constructions. This specification does not include tissue for manufacture of capacitors. Other commonly used terms for the materials include soft coil wrap, dense coil wrap, kraft coil insulation, dry-finished kraft, and water-finished kraft. The materials covered in this specification are classified into four types according to density range and nominal thickness and should conform to the required values of ash content, alcohol-soluble material content, aqueous extract conductivity, water-soluble chloride content, fiber composition, moisture content, hydrogen ion concentration, pH, tensile strength, dielectric breakdown voltage, and conducting paths.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. Scope
1.1 This specification covers electrical grade unsized, unbleached sulfate paper and paperboard for use as layer insulation in coils, transformers, and similar apparatus. Other applications include, but are not limited to, turn insulation, slot liners, wedges, phase insulation, and separator papers in stranded wire/cable constructions. Tissue for the manufacture of capacitors is not included in this specification. Other commonly used designations include:
1.1.1 Soft Coil Wrap,
1.1.2 Dense Coil Wrap,
1.1.3 Kraft Coil Insulation,
1.1.4 Dry-Finished Kraft, and
1.1.5 Water-Finished Kraft.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
ICS Code
ICS Number Code 29.035.10 (Paper and board insulating materials)
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DOI: 10.1520/D1305-16
Citation Format
ASTM D1305-16, Standard Specification for Electrical Insulating Paper and Paperboard—Sulfate (Kraft) Layer Type, ASTM International, West Conshohocken, PA, 2016, www.astm.org
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