Industrial substations

The author traces briefly the engineering development of “industrial substations”, by which term he designates installations of electrical plant equipment in consumers´ premises, receiving electrical energy from a central station system. A discussion is entered into of the factors governing the design and installation of this class of substation and four factors are advanced as determining the design: (1) Space economy; (2) Operating requirements; (3) Fire hazard and safety to attendants; and (4) Costs. Descriptions are given of some twelve industrial substations which are taken as typical installations and which are at present in operation in this country. Numerous diagrams and illustrations are given of the various plants. At the conclusion of the descriptions, detailed discussion is undertaken in a further analysis of the four factors enumerated as they relate to the twelve plants which have been described.