IEC EN 60727-2 Evaluation of Electrical Durability of Electrical Insulation Systems - Part 2: Test of Evaluation Procedures Based on Extreme Value Distributions

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of IEC EN 60727-2 testing. Explains statistical procedures for analyzing test data of electrical endurance that does not correspond to a normal distribution (Gaussian). It has technical report status.

For an alternating voltage inhomogeneous test sample, the distribution of voltage stress within the test sample is determined by the impedance (mainly capacitive). With an increasing direct voltage, the voltage distribution can still be largely capacitive, but partially dependent on the voltage rise rate. The resistive voltage distribution represents the steady-state state after constant voltage application. The choice between direct or alternating voltage depends on the purpose for which the degradation test will be used and to some extent the intended application of the material.

In addition, for materials with different layers or discontinuities, the voltage distribution across the test specimen as a result of interface polarization is affected by charges of opposite polarity, which can build up on either side of the interface and create sufficiently local fields.

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