Alternating-current machines; by unknow

Author:unknow
Language: eng
Format: epub
Tags: Electric machinery
Publisher: New York, D. Van Nostrand company; [etc., etc.]
Published: 1911-03-25T05:00:00+00:00

THE TRANSFORMER

189

Fig. 140.

Fig. 14X.

ALTERNATING-CURRENT MACHINES^

ondaries is followed. Fig. 141 shows the three coils composing one set. A low-tension coil is situated between two high-tension coils, this arrangement being conducive to a good regulation. The ideal method would be to have the coils still more subdivided and interspersed, but practical reasons prohibit this. The space between the coils and the iron is left to facilitate the circulation of the oil in which they are submerged. The laminae for the shell are stamped each in two parts and assembled with joints staggered. As can be seen from the first cut, all the terminals of the two primary and the two secondary coils are brought outside the case. The smaller sizes of this line of transformers, those under 1.5 k.w., have sufficient area to allow their running without oil, so the manufacturers are enabled to fill the retaining case with an insulating compound which hardens on cooling.

The General Electric Co.'s "H" transformers are of the core type. In Fig. 142 is shown a sectional view giving a good idea of the arrangement of parts in this type. Fig. 103 is also one of this line of transformers. In it is shown the tablet board of porcelain on which the connections of the two high-tension coils may be changed from series to parallel or ^'^ ^'*^'

vice versa, so that only two high-tension wires are brought through the case. Fig. 143 shows the arrangement of the various parts in the assembled apparatus. The makers

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.