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problem on efficiency of transformer,problem on transformer,how to efficiency of transformer

problem on efficiency of transformer,problem on transformer,how to efficiency of transformerУ вашего броузера проблема в совместимости с HTML5
a 40KVA transformer have iron loss 450W and full load of copper loss 850W if the power factor of the load of 0.8 lagging calculate 1.Full load efficiency 2.The load at which maximum efficiency occurs 3.The maximum efficiency
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