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Insulation board, also known as insulation pad, insulation pad, insulation pad, insulation blanket. Insulation mats are widely used in substations, power plants, power distribution rooms, laboratories, and field live working. Made of rubber insulation, there should be no harmful irregularities on the upper and lower surfaces of the insulation pad. Harmful irregularities of insulating mats refer to one of the following characteristics: defects that damage uniformity and damage the smooth contour of the surface, such as small holes, cracks, local ridges, cuts, inclusions of conductive foreign matter, creases, voids, undulations, and casting Signs, etc. Harmless irregularity refers to the surface irregularity formed during the production process.

More than 5 different points should be randomly selected on the entire insulation board for thickness measurement and inspection. Measurements can be made using a thousand heart liver or an instrument of the same precision. The accuracy of the micrometer should be within 0.02mm, the diameter of the drill should be 6mm, the diameter of the flat presser foot should be (3.17±0.25)mm, and the presser foot should be able to apply a pressure of (0.83±0.03)N. The insulating mat should be placed flat. Make the micrometer measurement smooth between the measurements.

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