File:A theoretical investigation of transformer design (1912) (14780541521).jpg

Identifier: theoreticalinves00colv (find matches)
Title: A theoretical investigation of transformer design
Year: 1912 (1910s)
Authors: Colville, John Robert Connell, Edwin Lewis
Subjects: Electric transformers Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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the minimum loss will be obtained if thetransformer is designed for greatest efficiency at the root mean square ofthe all-day load. However, the load-factor may be so low that such a designi.3 not practicable owing to the excessive heating at the maximum load3. Alsothe design to give least total loss is not necessarily the most economical.The central station equipment must include boilers, prime movers, and gener-ators of capacity sufficient to tahe care of the maximum load demanded by thesystem and during light loads the boilers must be hept in reserve for thesepeak-load3. With the boilers on light load the co3t of the losses in thetransformers of the system is very small, whereas, during the peak-load periodsexcessive losses would require extra equipment and the cost of the power tosupply these losses might thus amount to much more than the cost of lossesthroughout the light-load period. For this reason these transformers havebeen designed for maximum efficiency at full rated load.
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Fig. 2

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