ASTM D1830-2017 Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method《用弧形电极法测定电绝缘挠性薄片材料热稳定性的标准试验方法》.pdf
《ASTM D1830-2017 Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method《用弧形电极法测定电绝缘挠性薄片材料热稳定性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1830-2017 Standard Test Method for Thermal Endurance of Flexible Sheet Materials Used for Electrical Insulation by the Curved Electrode Method《用弧形电极法测定电绝缘挠性薄片材料热稳定性的标准试验方法》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D1830 99 (Reapproved 2012)D1830 17Standard Test Method forThermal Endurance of Flexible Sheet Materials Used forElectrical Insulation by the Curved Electrode Method1This standard is issued under the fixed designation D1830; the number immediately following the designation indicates the
2、year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.
3、Department of Defense.1. Scope1.1 This test method provides a procedure for evaluating thermal endurance of flexible sheet materials by determining dielectricbreakdown voltage at room temperature after aging in air at selected elevated temperatures. Thermal endurance is expressed interms of a temper
4、ature index.1.2 This test method is applicable to such solid electrical insulating materials as coated fabrics, dielectric films, compositelaminates, and other materials where retention of flexibility after heat aging is of major importance (see Note 4).1.3 This test method is not intended for the e
5、valuation of rigid laminate materials nor for the determination of thermal enduranceof those materials which are not expected or required to retain flexibility in actual service.1.4 The values stated in acceptable metric units are to be regarded as the standard. The values in parentheses are for inf
6、ormationonly.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory
7、limitations prior to use. For a specific hazard statement, see 10.1.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommenda
8、tions issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials atCommercial Power FrequenciesD374 Test Methods for Th
9、ickness of Solid Electrical Insulation (Metric) D0374_D0374MD5423 Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation2.2 Institute of Electrical and Electronics Engineers Publications:3IEEE No. 1 General Principles for Temperature Limits in the Rating of Elec
10、trical EquipmentIEEE No. 101A Guide for the Statistical Analysis of Thermal Life Test Data (including Appendix A)2.3 IEC Publications:IEC 216 Guide for the Determination of Thermal Endurance Properties of Electrical Insulating Materials (Parts 1 and 2)43. Terminology3.1 Definitions:1 This test metho
11、d is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of SubcommitteeD09.01 on Electrical Insulating ProductsCurrent edition approved Jan. 1, 2012Nov. 1, 2017. Published January 2012December 2017. Originally approved in 1
12、961. Last previous edition approved in 20052012as D1830 99 (2005).(2012). DOI: 10.1520/D1830-99R12.10.1520/D1830-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to t
13、he standards Document Summary page on the ASTM website.3 Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE), 445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
14、This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior edi
15、tions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.1 temperature index, na number which permits
16、 comparison of the temperature/time characteristics of an electricalinsulating material, or a simple combination of materials, based on the temperature in degrees Celsius which is obtained byextrapolating the Arrhenius plot of life versus temperature to a specified time, usually 20 000 h.3.1.2 therm
17、al life, nthe time necessary for a specific property of a material, or simple combination of materials, to degradeto a defined end point when aged at a specific temperature.3.1.3 thermal life curve, na graphical representation of thermal life at a specified aging temperature in which the value of ap
18、roperty of a material, or a simple combination of materials, is measured at room temperature and the values plotted as a functionof time.3.2 Definitions of Terms Specific to This Standard:3.2.1 thermal endurance grapha straight-line plot of the logarithm of thermal life in hours versus the reciproca
19、l of the absoluteaging temperature in kelvins (also known as the Arrhenius plot).4. Summary of Test Method4.1 Specimens are aged in air at a minimum of three temperatures above the expected use temperature of the material. Dielectricbreakdown voltage tests in air at room temperature are periodically
20、 made to determine the time of aging at each test temperaturerequired to reduce the breakdown voltage to a value of 12 kV/mm (300 V/mil) of original thickness. These thermal life values areused to construct a thermal endurance graph by means of which temperature indices may be are estimated correspo
21、nding to athermal life as specified in the material specification or as agreed upon between the user and the supplier.NOTE 1This test method is not applicable to materials having an initial dielectric breakdown voltage of less than 12 kV/mm (300 V/mil) of originalthickness unless lower endpoint valu
22、es are agreed upon or indicated in the applicable material specifications.5. Significance and Use5.1 Amajor factor affecting the life of insulating materials is thermal degradation. Other factors, such as moisture and vibration,may are able to cause failures after the material has been weakened by t
23、hermal degradation.5.2 Electrical insulation is effective in electrical equipment only as long as it retains its physical and electrical integrity. Thermaldegradation may is able to be characterized by weight change, porosity, crazing, and generally a reduction in flexibility, and isusually accompan
24、ied by an ultimate reduction in dielectric breakdown voltage.6. Apparatus6.1 Electrode Test FixtureThe fixture shall be in accordance with the dimensions shown in Fig. 1 and Fig. 2. Electrodes shallbe of polished brass, with the upper electrode having a mass of 1.8 6 0.05 kg (4.0 6 0.1 lb).6.2 Diele
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