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    Process and molding of insulation board

    发布者:隆利达绝缘电器 Release time: 2016-09-22Publisher : Longlida Insulation

    Process and molding of insulation board:

    There should be no harmful irregularities on the upper and lower surfaces of the insulation board . Harmful irregularities refer to one of the following characteristics, that is, defects that damage uniformity and damage the smooth contour of the surface, such as pinholes, cracks, local bulges, cuts, inclusions of conductive foreign bodies, creases, voids, bumps and corrugations, casting marks . Harmless irregularities are surface irregularities formed during the production process.

    Insulation board thickness:

    Five or more different points should be randomly selected for thickness measurement and inspection on the entire insulation board. Measurements can be made with a thousand centimeters of heart or liver with the same accuracy. The accuracy of the micrometer should be within 0.02mm, the diameter of the measuring drill is 6mm, the diameter of the flat presser foot is (3.17 ± 0.25) mm, and the presser foot should be able to apply a pressure of (0.83 ± 0.03) N. The insulation pad should be placed flat and Make the micrometer measurement smooth.

    Insulation board Standard:

    The distribution room voltage is 10KV, and the 8mm thick power frequency withstand voltage test is performed at 10000V for 1 minute without breakdown, and the power frequency withstand voltage test is 18000V for 20 seconds. The distribution room voltage is 35KV, 10-12mm thick power frequency withstand voltage test, 15000V for 1 minute No breakdown, 26000V, 20 seconds breakdown in the power frequency withstand voltage test. The low voltage of the power distribution room is 5mm thick and less than 500V. The power frequency withstand voltage test is 3500V for 1 minute without breakdown, and the power frequency withstand voltage test is 10000V for 20 seconds. wear!