. Electric railway journal . good residential section, and it was not longbefore the noise of the rotary converter brought sucha protest from the surrounding neighbors that it be-came necessary to move the substation to anotherpoint. A point near the end of one of the inter-secting lines was selected as the most desirable of theavailable locations, but this was so far removed fromthe load center that it made the line losses very heavy and the voltage regulation unsatisfactory. From aneconomic standpoint it wastherefore decided that it wasnecessary to have a substa-tion located at the load cent
. Electric railway journal . good residential section, and it was not longbefore the noise of the rotary converter brought sucha protest from the surrounding neighbors that it be-came necessary to move the substation to anotherpoint. A point near the end of one of the inter-secting lines was selected as the most desirable of theavailable locations, but this was so far removed fromthe load center that it made the line losses very heavy and the voltage regulation unsatisfactory. From aneconomic standpoint it wastherefore decided that it wasnecessary to have a substa-tion located at the load centerpreviously chosen, and so theengineering department, ofwhich L. L. NeviTTian is thechief and H. E. Cox is assis-tant, set about the task ofdesigning a noiseless substa-tion. The desired result wassimply yet most effectivelyattained in the new Wood-lawn substation. In working out the designit was assumed that thetransformer cooling air leav-ing the building was largelyresponsible for transmittingthe noise of the rotary con-. OPPOSITE SIDE OF SUBSTATION SHOWING OUTGOING FEEDER CABLES AND WAITING ROOM CONVERTED INTO CONFECTIONERY STORE verter. The substation was therefore built in tworooms, one room for the converter being sealed uptight except for an opening in the roof, and anotherroom for the transformer, switchboard, etc., which hasa door and windows, but these are kept closed. Thecooling air for the transformers is dravioi in througha cupola in the roof of the converter room by a motor-driven fan placed in the pit underneath the air is thus drawn down through the converter andforced down into a tunnel beneath the floor of theconverter pit and thence through this tunnel to threeopenings in the floor of the other room, up throughthe three single-phase transformers and out throught<5 Sec+ion A-A of Cable troughbehind Switchbooirol
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