ASTM D149脲甲醛树脂溶液中不挥发物含量的标准测试方法
日期:2012-02-08 16:37
discussion of the significance of dielectric strength tests.
1. Scope
1.1 This test method covers procedures for the determination of dielectric strength of solid insulating materials at commercial power frequencies, under specified conditions. ,
1.2 Unless otherwise specified, the tests shall be made at 60 Hz. However, this test method is suitable for use at any frequency from 25 to 800 Hz. At frequencies above 800 Hz, dielectric heating is a potential problem.
1.3 This test method is intende
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