ASTM D1677 - 17
Standard Methods for Sampling and Testing Untreated Mica Paper Used for Electrical Insulation
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Significance and Use
7.1 Accurate determination of thickness is important for identification purposes. Thickness is related to weight and must be known in order to calculate apparent density and the dielectric strength.
7.2 Thickness variation affects the quality of roll winding and is useful in judging the uniformity of mica paper particularly with respect to dielectric breakdown voltage, impregnation time, and thickness of the end product.
1. Scope
1.1 These methods cover procedures for sampling and testing untreated mica paper to be used as an electrical insulator or as a constituent of a composite material used for electrical insulating purposes.
1.2 The procedures2 appear in the following order:
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| ASTM |
|
|
| Method |
| Procedures | Sections | References |
| Apparent Density | 12 | ... |
| Aqueous Extract Conductivity | 32 and 33 | D202 |
| Conditioning | 4 | D685 |
| Dielectric Strength | 16 – 19 | D149 |
| Impregnation Time | 20 – 24 | D202 |
| Moisture Content | 26 – 28 | D644 |
| Roll Quality | 25 | ... |
| Sampling | 3 | ... |
| Tensile Strength | 13 – 15 | D828 |
| Thickness | 6 – 10 | D374 |
| Weight | 11 | D646 |
| Weight Variability | 29 – 31 | ... |
1.3 The values stated in inch-pound units are to be regarded as the standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
D644 Test Method for Moisture Content of Paper and Paperboard by Oven Drying
D646 Test Method for Mass Per Unit Area of Paper and Paperboard of Aramid Papers (Basis Weight)
D685 Practice for Conditioning Paper and Paper Products for Testing
D828 Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus
D1711 Terminology Relating to Electrical Insulation
ICS Code
ICS Number Code 29.035.50 (Mica based insulating materials)
UNSPSC Code
UNSPSC Code 14110000(Paper products)
Referencing This Standard
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DOI: 10.1520/D1677-17
Citation Format
ASTM D1677-17, Standard Methods for Sampling and Testing Untreated Mica Paper Used for Electrical Insulation, ASTM International, West Conshohocken, PA, 2017, www.astm.org
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