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Are Cable Shields Being Damaged During Ground Faults?

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2 Author(s)
Paul S. Hamer ; Chevron Corporation, P. O. Box 5045, San Ramon, CA 94583. ; Barry M. Wood

Simulated ground-fault tests (50-700 A) of various cable, ground wire, and conduit configurations are made to determine the proportion of the total ground-fault current carried by the cable metallic shield. The percentage of the total fault current for the various return paths is tabulated, along with representative zero-sequence circuit impedances. General guidelines for protecting cable shields from damage are presented.

Published in:

IEEE Transactions on Industry Applications  (Volume:IA-22 ,  Issue: 6 )