Resistance formulas of grounding systems in two-layer earth

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · IEEE Transactions on Power Delivery

DOI:https://doi.org/10.1109/61.517487· OSTI ID:372220

Chow, Y L; Elsherbiny, M M; Salama, M M.A. ^[1]

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1. Univ. of Waterloo, Ontario (Canada). Electrical and Computer Engineering Dept.

This paper lists, under one umbrella, the resistance formulas of grounding systems, namely: the buried grid, the driven rodbed, and the combination of the buried grid and rodbed. The formulas are synthesized from rigorous asymptotes; as a result, they are accurate (averaged error {approx} 5%) and do not require empirical tables or graphs. The validity of these formulas is verified in this paper, not by their derivations, since they are too lengthy, but by checking numerically, against the results of detailed-numerical methods and analytically, against asymptotes. The formulas are suitable for calculation with a handheld calculator, and therefore they are useful tools for an engineer in the field.

• OSTI ID: 372220
• Report Number(s): CONF-960111-; ISSN 0885-8977; TRN: IM9641%%297
• Journal Information: IEEE Transactions on Power Delivery, Vol. 11, Issue 3; Conference: IEEE Power Engineering Society (PES) Winter meeting, Baltimore, MD (United States), 21-25 Jan 1996; Other Information: PBD: Jul 1996
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
SOILS
ELECTRIC CONDUCTIVITY
ELECTRIC GROUNDS
POWER SYSTEMS
CALCULATION METHODS