Transcription of 1. Soil Resistivity Testing
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1. Soil Resistivity Testing
Earthing Techniques 1. soil Resistivity THEORY OF soil MAKING A MEASUREMENT .. 4 soil Resistivity Testing PROCEDURE GUIDELINES .. (a) Test (b) Selection of Test Method Type .. (c) Traverse Locations.. (d) Spacing (e) Practical Testing 10 2. INTERPRETATION AND MODELLING OF RESULT ..11 APPARENT Resistivity CALCULATION .. 11 INTERPRETATION OF Resistivity 12 3. HOW TO DESIGN A LIGHTNING EARTH SYSTEM ..14 TYPES OF EARTH ELECTRODES .. 14 COMMON EARTHING SYSTEMS .. 14 EARTH RESISTANCE OF AN ELECTRODE - CALCULATION .. 16 Rods Driven Vertically into the 16 Rod Electrodes in Parallel .. 16 Trench Electrodes - Horizontal Electrodes buried under the 17 Radial Conductors .. 18 Ground-grid Mesh 19 RECOMMENDED MATERIAL APPLICATIONS .. 19 4. Testing AN EARTHING SYSTEM ..21 EARTH RESISTANCE OF AN ELECTRODE - MEASUREMENT .. 21 Fall of Potential Method .. 22 The 62% Method .. 24 Other Test Methods.
Earthing Fundamentals Lightning & Surge Technologies 1. Soil Resistivity Testing 1.1 INTRODUCTION It is well known that the resistance of an earth electrode is heavily influenced by the resistivity of the soil
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