ASTM D3151-88 (R1998) PDF Download

The ASTM D3151-88 (R1998) standard provides guidelines for determining the thermal failure of solid electrical insulating materials when exposed to electric stress at commercial power frequencies. This test method is specifically designed for materials, such as certain glasses and ceramics, that show significant increases in dielectric loss as the temperature rises.

The standard aims to assess the ability of electrical insulating materials to withstand the combination of electric stress and thermal conditions. It outlines the procedure to be followed for testing these materials, including the equipment requirements and test parameters.

The primary objective of this test is to determine the point at which the material fails under the specified conditions. The test involves subjecting the material to an increasing electric stress while measuring various electrical properties, such as dielectric loss, until the material reaches a predetermined temperature or exhibits a significant increase in dielectric loss.