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Magnetic Hysteresis Loop (MHL) and micro-Vickers hardness measurements were carried out in isothermal aged Fe-20 wt. % Cr alloy. The results were compared with the existing atom probe data at similar heat treated conditions. Coercivity and hardness of the alloy was increased and remanence of the alloy was decreased with the increase in ageing time. Such increase in the magnetic and mechanical hardness...
Recently, composite insulators have been increasingly employed mainly from the economic viewpoint. We have developed a new type outdoor termination with composite insulator, which can be installed horizontally on the steel tower, in order to reduce the construction cost. In this outdoor termination, SF6 gas is filled in the composite insulator and a cold shrinkable pre-molded rubber unit is applied...
Effects of blending alkylbenzenes in a paraffinic base transformer oil were extensively investigated, paying particular attention to their influence upon its heat-stability. Oxidation stability tests of the oil specimens, tube aging tests of Kraft paper/oil electrical insulation systems for oil-filled transformer use and accelerated aging tests of the distribution transformers consisting mainly of...
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