Outdoor vs. indoor substations

The development of the outdoor substation vs. the indoor type is an interesting commentary on the adaptability of engineering progress to new fields and the subject is briefly recapitulated in this paper, in line with the developments and application of this branch of transmission work. The causes for development of this apparatus, together with a general description of the classes of apparatus involved which have been changed to meet new conditions, are given. The application of the indoor vs. the outdoor substation to services of different character is indicated, and the tendencies for the future briefly touched upon. A comparison of the advantages and disadvantages of the types considered is outlined. In general, it appears that the equipment for outdoor installations has been successfully developed to meet the severe conditions imposed, and the numerous installations involving outdoor features indicate the extensive use of this idea in the future, while its development as applied to the central station itself affords a considerable field for attention.