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The use of a built-in test equipment (BITE) that is able to provide a real-time diagnostic of a monitored device allows increasing reliability and decreasing costs. The BITE operation can be based on a suitable life model of the device that must relate the time to failure to the “stress history” of the component. The life model is developed by exploiting the results of a proper measurement campaign...
This paper deals with a life model for low voltage polyester-insulated capacitors subjected to time-varying temperature. The results of accelerated life tests performed on low voltage polyester-insulated capacitors at various temperatures are illustrated and from them a constant-temperature life model is derived. Such model, inserted within a “Miner's law” framework, gives rise to a variable-temperature...
The use of an equipment able to provide a real time diagnostic of a monitored device (BITE) allows to increase reliability and to decrease costs. BITE operates on the basis of a suitable life model of the considered device that must relate time to failure with past and present stresses. Model development can be carried out by exploiting the results of a proper measurement campaign. In this paper,...
Transformer oil-paper insulation system is continuously subjected to thermal stress which is a key factor inducing its deterioration. Dielectric response of oil-paper insulation in frequency domain is being gradually used by power utilities for assessing the condition of transformer oil-paper insulation system, and the Frequency Domain Spectroscopy (FDS) measurement is a promising method. It is important...
Plasma-exposed Si surface related to Si recess in source/drain region was investigated in detail for various superposed bias configurations with frequencies of 13.56 MHz and 400 kHz. Two different bias powers were utilized by an inductively coupled plasma reactor (ICP). The surface layer (SL) and the interfacial layer between the SL and Si substrate (IL) were analyzed by spectroscopic ellipsometry...
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