(under subclass 13) Subject matter wherein the conversion system is of a type wherein polyphase alternating current is converted to direct current or vice versa and an interphase transformer is provided in the polyphase circuit.
(1) Note. An interphase transformer is an auto transformer or a set of mutually coupled reactors used in combination with the converter transformers, where a plurality of transformers are used in the line circuits to balance the distribution of current among the converters connected to the transformer. Also, an interphase transformer may be connected to the line circuit so as to multiply the number of paths of the current through the converter without multiplying the number of phases in the line circuit containing the interphase transformers. Many of the systems having interphase transformers use electronic tubes as the converting means.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
142, for electronic tube systems of the gas or vapor type having a polyphase source of supply for the electronic tubes, the supply circuit including an interphase transformer. The systems in subclass 142 of Class 315 are closely analogous to the systems in this subclass as many of the systems in Class 315 are disclosed as being rectifying systems.
