نتایج جستجو برای: کابل xlpe
تعداد نتایج: 955 فیلتر نتایج به سال:
The present review article represents a comprehensive study on polymer micro/nanocomposites that are used in high-voltage applications. Particular focus is on the structure-property relationship of composite materials used in power engineering, by exploiting fundamental theory as well as numerical/analytical models and the influence of material design on electrical, mechanical and thermal prope...
Abstract The aim of this work is to highlight the evolution physico-chemical properties peroxide crosslinked polyethylene (XLPE) insulation material exposed electrical aging. Specific analysis and characterization studies were carried out determine effect aging on different samples at micro macro levels. Based analytical investigations, it was shown that yielded significant changes in chemical ...
Abstract We present an experimental and theoretical exploration of well‐dispersed, distinctively stable, fumed SiO 2 crosslinked polyethylene (XLPE) nanocomposites. The mechanical properties /XLPE nanocomposites were assessed with different concentrations , which had noticed that network morphology was immensely influential for the performance properties. A reasonable micromechanical models com...
Bragdon, C.R; Wannomae, K. K.; Lozynsky, A.; Micheli, B.; Malchau, H. Harris Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, Boston, MA 02114 Senior author [email protected] INTRODUCTION: Oxidized zirconium (OxiniumTM) is a bearing surface introduced for use in THA to minimize wear in vivo. Oxinium femoral heads are manufactured by oxidizing wrought Zr-...
Abstract This study investigated the electric field distribution of underground cable insulation in cross-linked polyethylene/zinc oxide (XLPE/ ZnO) nanoparticles (NPs) for medium-voltage (MV) cables. The ZnO NPs that were obtained by three methods preparation classified using transmission electron microscopy (TEM). semi-spheres with sizes 35–55 nm on TEM images. XLPE/ films various NP weight c...
در این نوشتار ارتعاشات غیر خطی کابل حامل جرم متحرک که بهکمک فنر و دمپر به کابل متصل شده، مورد بررسی قرار گرفته است. یک انتهای کابل ثابت، و انتهای دیگر آن، با اختلاف ارتفاع، غیرثابت است. کرنش مماسی کابل صفر فرض شده، اما طول کابل دائماً در حال تغییر است و این تغییر طول کابل، به آن اجازهی ارتعاش میدهد. این تغییرات بهگونهیی است که اختلاف کشش در انتهای غیر ثابت کابل صفر شود. ارتعاشات کابل بهصور...
In this paper, crosslinked polyethylene-polystyrene (XLPE-PS) composites with different degrees of crosslinking were fabricated by using agent contents and their direct current (DC) breakdown performance at 30~90 °C was investigated. Results show that the increase degree crosslinking, crystallinity XLPE-PS decreases gradually, but DC strength demonstrates an increasing trend enhancement also in...
During the long-term operation of high-voltage cross-linked polyethylene (XLPE) cables, cable will gradually deteriorate under effect various aging factors. Thermal is one key factors directly related to reliability XLPE cables. In this paper, thermal samples are prepared for PDC measurement. Based on polymer trap theory and extended Debye model, shape curve, depolarization charge, parameters f...
چکیده پلها از جمله مهمترین سازههای هیدرولیکی هستند که آبشستگی موضعی اطراف پایههای آنها در طول جریانهای سیلابی یکی از عوامل تهدید پایداری آنها به شمار میآید. بنابراین طراحی پایهای که بتواند در شرایط بحرانی مقاومت نماید به گونهای که توجیه اقتصادی نیز به دنبال داشته باشد به تحقیقات گستردهای نیاز دارد. یکی از روشهای اقتصادی جدید مطرح شده در کنترل آبشستگی پایه پلها استفاده از کابل پیچ...
Various kinds of polymers are used for electrical insulation in nuclear power plants. They subjected to thermal and radioactive stresses, depending on their locations. also high-temperature steam the event an accident. Regarding this, sheets flame-retardant cross-linked polyethylene (FR-XLPE) were heat, gamma-rays, exposure, infrared absorption spectra, stress-strain relations, indenter moduli,...
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