2/13/2023 0 Comments Setool test point cable![]() ![]() For an electrical tree from the tip of a needle in PE insulation in laboratory conditions to completely penetrate the insulation during the test duration, VLF ac voltage test levels and testing time durations have been established for the two most commonly used test voltage sources, the cosine-rectangular and the sinusoidal wave shapes. ![]() Inception of an electrical tree and channel growth time are functions of several factors including test voltage, source frequency and amplitude, and the geometry of the defect. ![]() If the test cable has a defect severe enough at the withstand test voltage, an electrical tree will initiate and grow in the insulation. The purpose of a withstand test is to verify the integrity of the cable under test. ![]()
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