Neutralcurrentsinthree phase alternatorstransformers by edkaiser femyers armourinstituteoftechnology 191. A study of neutral currents in star connected three phase alternators and transformers item preview remove circle share or embed this item a study of neutral currents in star connected three phase alternators and transformers by kaiser everett dee myers frank edward. There are different types of connection employed for three phase transformers the star star y y connection of three phase transformers is most economical type of connection for small current a nd high voltage transformers the advantages and disadvantages of this connection are given below. Star and delta connections are used in power systems for 3 phase connections of transformers alternators etc in star connection similar terminals of phases are connected with each other whereas in delta one end of a phase is connected to the d. One phase is conducting at a time on the three phase lines with some current being returned on the phase lines and not in the neutral the result is a reduction in neutral current as a percent of phase current the maximum neutral current of 173 of phase current is typically seen only at lower current sub feeders in larger distribution systems
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