Fleit, Jacobson, Cohn & Price
Noise filter for three-phase four-wire system
 A noise filter for an electric wire of star-connected three-phase four-wire system, in which a neutral conductor has a sectional area which is larger than a sectional area of each of voltage conductors. Three voltage conductors are wound on a magnetic core that constitutes a closed magnetic path. The neutral conductor is coupled to the three voltage conductors via three respective capacitors. 
Fuji Electrochemical Co., Ltd.
H H
H03H H02M
inventional inventional
Noboru Masami Kazuhiro
Kato Nonaka Hibi