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Economical loading of underground cables

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1 Author(s)
Church, Elwood A. ; The Edison Elec. Illum. Co. of Boston, Mass.

Load ratings for underground electric power transmission cables for 2 typical metropolitan load cycles are computed in this paper by the method of harmonic analysis of load cycles. Test data are given which agree reasonably well with theoretical calculations. A logical basis for emergency rating of cables also is demonstrated. A comparison of costs of transmission for various duct conditions indicates that large conduit systems are not economical because of the lower ratings necessitated by the greater heat dissipated.

Published in:

Electrical Engineering  (Volume:54 ,  Issue: 11 )