BS EN 60216-3-2:1995 Guide for the determination of thermal endurance properties of electrical insulating materials. Part 3. Instructions for calculating thermal endurance characteristics - Section 3.2 Calculations for incomplete data: proof test results up to and including the median time to end-point (equal test groups)
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This part of IEC Publication 216 gives instructions for calculation of thermal endurance characteristics from data obtained in accordance with IEC Publications 216-1 and 216-2.
Section 1 gives the main sequence calculation scheme for complete normally distributed data, in accordance with the statistical principles set out in IEC Publication 493-1, to which reference should be made for the mathematical background details.
Section 3 gives the calculation sequence for incomplete test results from groups of equal magnitude, where results are available up to and including the median time to end-point.
A worked example, a computer program written in "BASIC" and appropriate statistical tables are given in the appendices.
BS EN 60216-3-2:1995 Guide for the determination of thermal endurance properties of electrical insulating materials. Part 3. Instructions for calculating thermal endurance characteristics - Section 3.2 Calculations for incomplete data: proof test results up to and including the median time to end-point (equal test groups)