astmd149击穿电压标准电流-概述说明以及解释.pdf,astmd149 击穿电压标准电流 概述说明以及解释 1. 引言 1.1 概述 在现代电气工程和绝缘材料研究领域 ,对电压击穿性能的测试与分析是至关重要 的。ASTM D149标准电流是一种常用的测试方法 ,用于确定绝缘材料在特定电 压下是
ASTMD149-2004击穿电压.pdf,An American National Standard Designation: D 149 – 97a (Reapproved 2004) Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies1 Th
If failure occurs at the third step or less, or in less than 120 s, whichever is greater, on more than one specimen in a group, the tests should be repeated with D 149 – 97a (2004) Preferred starting voltages, Vs are 0.25, 0.50, 1, 2, 5, 10, 20, 50, and 100 kV. Step ...
5 Copyright by ASTM Int'l (all rights reserved); Sat Feb 20 21:06:06 EST 2010 Downloaded/printed by SGS North America Inc. pursuant to License Agreement. No further reproductions authorized. D149 – 09 9.1.6 Whatever the form of the material, if tests of other than surface-to-surface ...
20 g/10 min 0.70 % 测试方法 ASTM D792 ASTM D1238 ASTM D955 2016/5/10 Solvay Specialty Polymers 页: 1 / 5 Radel® R-5000 聚苯砜 物理性能 吸水率 24 hr 平衡 典型数值 单位制 0.37 % 1.1 % 机械性能 拉伸模量 (3.18 mm) 抗张强度 (3.18 mm) 伸长率 屈服, 3.18 mm 断裂, 3.18 ...
20 Novell Modular Authentication Services (NMAS) 3.0 Administration Guide • [-h hostname[:port]] - (Optional) The hostname and port of the server. Use this if DHost is not running on the default port. If the login method already exists, nmasinst will update it. 3.1.3 Installing a...
·cm 19 kV/mm 3.48 3.47 7.0E-4 5.0E-3 典型数值 单位制 V-0 典型数值 单位制 163 到 191 °C 3.0 到 4.0 hr 343 到 399 °C 121 到 163 °C 快速 0.345 到 0.689 MPa 2.0:1.0 23°C 80°C 100°C 130°C 150°C 180°C 0.015 0.020 测试方法 ASTM D257 ASTM D149 ASTM D150 ASTM ...
ASTM D 149-97a Tue Nov 18 10:04:08 2003
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ASTM D3755-14 美国材料与试验协会标准.pdf,Designation: D3755 − 14 Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials Under Direct-Voltage Stress1 This standard is issued under the fi