ECA 186-4E

Abstract

<strong>PURPOSE</strong> <br>This dielectric test is performed for the purpose of determining the ability of component parts to withstand a potential at sea level or at a specified altitude. The potential used is normally above rated voltage and simulates momentary overpotentials due to switching, surges, and other similar phenomena. AIthough this test is often called a voltage breakdown or dielectric strength test, the intention is not to cause a breakdown of the insulation of to detect corona, but to determine whether insulating materials and spacings in the component are adequate. If a specimen is faulty in these respects, application of the test voltage will result in either an air, surface, or puncture discharge. <br>In the following paragraphs, when items are required to be specified, it is understood to refer to the individual specification.