. Electric railway journal . o sections or 3 miles. As the traffic onall of these lines is very heavy during the rush-hourperiod, it will be seen that the power demand on thesubstation is far higher than usually falls to the lotof a surface car substation in a suburban district. Transformer Oil Piping and Drying SystemWell Worked Out To supply these demands the new substation isequipped with one 2000-kw., one 1500-kw. and one 1000-kw. synchronous converters. These are six-phase, 60-cycle machines, the direct-current voltage being energy for their operation is purchased from thePhiladel
. Electric railway journal . o sections or 3 miles. As the traffic onall of these lines is very heavy during the rush-hourperiod, it will be seen that the power demand on thesubstation is far higher than usually falls to the lotof a surface car substation in a suburban district. Transformer Oil Piping and Drying SystemWell Worked Out To supply these demands the new substation isequipped with one 2000-kw., one 1500-kw. and one 1000-kw. synchronous converters. These are six-phase, 60-cycle machines, the direct-current voltage being energy for their operation is purchased from thePhiladelphia Electric Company whose 66,000-volt, two-circuit, Philadelphia-Chester line runs about 400 the outdoor substation which has been installedto transform the line voltage to the railway companysstandard primary distribution voltage, 13,200. Thetransformer equipment consists of three 2000-kva., 60-cycle, 69 000/13,200-volt, oil-insulated, radiator-typetransformers built by the Westinghouse Electric & TRANSFORMERS. the oil from one transformer and is located in a pitnear the transformer bank. This pit has been so de-signed as to permit the ready removal of the have been provided so that a filter pumpand press can be used either indoors or outdoors inpumping oil from the tank to a transformer or for FIG. 7—OIL-PIPING DIAGRAM ILLUSTRATING CONNEC-TIONS TO FILTER AND PUMP Manufacturing Company. In the foundation and over-head structure plans, provision has been made for thefuture addition of another similar group of trans-formers. To insure continuity of service both circuitsof the high-tension line are connected into the sub-station. The high-tension line construction involved a specialtapping tower in the line of the Philadelphia ElectricCompany and a turning tower upon which the high-tension tap-leads make a right-angle turn to reach theanchorages on the outdoor substation platform. Inthe design of these leads special precautions were takento eliminate
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