Earthing Techniques
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چکیده
1.3 MAKING A MEASUREMENT ........................................................................................................................................... 1.3.1 PRINCIPLES...............................................................................................................................................................4 1.3.2 SOIL RESISTIVITY TESTING PROCEDURE GUIDELINES .................................................................................. (a) Test Method.................................................................................................................................................................. (b) Selection of Test Method Type .................................................................................................................................... (c) Traverse Locations. ...................................................................................................................................................... (d) Spacing Range.............................................................................................................................................................. (e) Practical Testing Recommendations.........................................................................................................................10
منابع مشابه
The effect of earthing (grounding) on human physiology
Previous research (12) showed that connecting the human body to the earth during sleep normalizes circadian cortisol profiles and reduces or eliminates various subjectively reported symptoms, including sleep dysfunction, pain and stress. We therefore hypothesized that earthing might also influence other aspects of physiology. Fifty-eight healthy adult subjects (30 controls) participated in a do...
متن کاملEarthing the human body influences physiologic processes.
OBJECTIVES This study was designed to answer the question: Does the contact of the human organism with the Earth via a copper conductor affect physiologic processes? Subjects and experiments: Five (5) experiments are presented: experiment 1-effect of earthing on calcium-phosphate homeostasis and serum concentrations of iron (N = 84 participants); experiment 2-effect of earthing on serum concent...
متن کاملCorrosion Tests of Steel Earthing Electrodes with Protective Coatings Made from Different Materials
In the paper the methodology and test results of field and laboratory corrosion tests of steel earthing rods with zinc galvanized coatings and copperbonded coatings are described. The corrosion rate and level of corrosion damage of earthing rods with two different protective coatings have been compared as well some conclusions related to reliability and assessment of technical life time of st...
متن کاملPerformance of Earthing Systems of Operational/Live Stations under Impulse Conditions
-A number of impulse investigations on earthing systems have been performed in the field [1-6]. The studies were conducted on a few types of earth electrode: vertical rods, horizontal electrodes and the mesh and other geometries of electrodes. The type selected may depend on the type of soil encountered and the available depth or area available. Impulse voltages of up to 3MV with impulse curren...
متن کاملEarthing Resistance Tester developed using Resonant Circuit Technology with No Auxiliary Electrodes
This paper presents an earthing resistance tester that uses resonant circuit technology to operate with a simple earthing electrode and without auxiliary electrodes. The measurement mechanism is analyzed using an earth return circuit model. The earthing electrode being tested, a lead wire, a return wire and the soil itself comprise the earth return circuit (LRC serial circuit). The requirements...
متن کاملHV Substation Earthing Design for Mines
-High Voltage (HV) substation forms important assets for the mining industries. The existences of these substations necessitate earthing design to ensure safety compliance to the mine regulations. The HV system within the mines is consisted of multiple substations which are connected throughout and underground cable. These substations provide the load with the required electrical power to perfo...
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