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Short-term DC progressive-stress tests on 200 micron thick specimens of a commercial XLPE and its silica nanocomposite intended for DC use have shown that the DC nanocomposite has a considerably higher breakdown strength than the AC XLPE. However, constant-stress tests have shown that both the nanocomposite and the unfilled XLPE have similar lifetimes at medium fields of 125–175 kV/mm. There is also...
Recently authors have proposed damage equalization method with step-stress tests for quick estimation of life exponent of power equipment insulation. Traditional constant-stress accelerated ageing tests for insulation are disadvantageous since outliers in sample data will always be there and some samples may not fail even after a long time. Such long duration life estimation tests are a major bottleneck...
Insulation in electrical equipment is a very crucial aspect while designing any electrical system especially in case of high voltages in any part of a power system. Hence it is crucial to determine the properties and performance of an insulating material. The experiments deal with the measurement of breakdown voltages and determination of ageing of an insulating material under accelerated AC fields...
The objective of using logic BIST for online and periodic testing is to identify defects, like opens, resulting from the wear and tear of the circuit. We have shown that existing test sets have a low coverage for open defects located in scan flip-flops, even though such defects may affect functional operation. Existing Logic BIST structures suffer from the same limitations. A novel Logic BIST architecture...
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