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IEEE consultant for Measuring Earth Resistivity, flooring Impedance, and Earth floor Potentials of a floor approach

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Extra info for IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

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11. 1 Purpose The main purpose of a model test is to help predict the probable resistance to true earth of a complex ground electrode or to predict the probable voltage gradient of a complex ground system [B1], [B11], [B13], [B25], which otherwise cannot be calculated accurately. 2 Similarity Criteria and Limitations The work starts by establishing the earth structure to be modeled; the reduced model will then have to obey certain laws [B11]: 1) 2) All the geometrical dimensions of the earth model and of the test electrode should be scaled according to one unique factor µL.

3 Selection of Auxiliary Equipment The following additional equipment may be useful to ease and speed up the measurements. 1 Hammers In normal soils, hand hammers (2 to 4 kg of mass) are satisfactory for driving the rods to depths of 2 m-3 m. The driving force should be axial to the rod in order to avoid undue whipping. A practical type of hammer useful for the prevention of whipping consists of a chuck and sliding hammer (Fig 20). This device has the advantage that the work may be at a level convenient to the individual making the test without using an auxiliary platform.

And MUKHEDKAR, D. Ground Electrode Resistance Measurement in Non-Uniform Soils, IEEE Transactions, Jan 1974, vol PAS—93, no 1, pp 109-116. , and MUKHEDKAR, D. Modelling of Potential Distribution Around a Grounding Electrode, IEEE Transactions, Sept 1973, vol 02, no 5, pp 1455-59. , and MUKHEDKAR, D. Resistance Measurement of Large Grounding Systems, IEEE paper F79656—0, IEEE Power Engineering Society Meeting, Vancouver 1979. , WHITEHEAD, E. R. Analytical Models for Distributed Grounding Systems, IEEE Transactions, Sept/Oct, vol PAS—73, pp 1763-1770.

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