. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . to thepower supply and practically arc mo moving parts to get out of 404 RAILWAY AND LOCOMOTIVE ENGINEERING Dccembtr, 1917. order, and there can l)e no dirt nor mois-ture reacii the inside of the tank. Self-cooled transformers are made in manysizes ranging from I or 2 up to 5000 In the self-cooled transformer the lieatof the oil is carried to the tank and radi-ates its heat into the air. In the ..mallsizes, the tanks are made stnuoth and nospecial provisions are made to f
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . to thepower supply and practically arc mo moving parts to get out of 404 RAILWAY AND LOCOMOTIVE ENGINEERING Dccembtr, 1917. order, and there can l)e no dirt nor mois-ture reacii the inside of the tank. Self-cooled transformers are made in manysizes ranging from I or 2 up to 5000 In the self-cooled transformer the lieatof the oil is carried to the tank and radi-ates its heat into the air. In the ..mallsizes, the tanks are made stnuoth and nospecial provisions are made to facilitatea more rapid dissipation of the heat. .-Vslarger sizes are encountered, a greaterradiating surface is required to dissii)atethe heat than is possible with a smoothtank, so that the sides of the tanks areheavily corrugated, affording a maximumradiating surface. .\ tank so constructedis shown in Fig. 2. .\s the capacity increases it is stillnecessary to increase this radiating sur-face and the Weslinghouse company liasdeveloped and built what is known as theradiator type tank. The tanks arc. FIG. 4. DRYING TR.\\.SFi iK-i made of heavy boiler-iron plate weldedtogether. The cooling radiators are se-curely litted to the tank, and connect tothe main tank by an opening at the top,and bottom. .\ tank of this type is shownby Fig. 3. With the radiator tank typea maximum cooling effect is obtained andself-cooled transformers of 5000 ca-pacity have been built. With the development of the electricalindustry there is an increasing demandfor transformers of greater a certain size the cost of con-struction of a self-cooling transformer isexcessively great, and other means ofcooling must be provided. W^ater has been used for cooling inmany instances and this principle haslicen applied to the transformer. Theheat generated in the coils and trans-ferred to the oil is not dissipated by aradiator, but is absorbed by water circu-lating in several coils of pipe locat
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
