Transcription of easuring Ground Resistance — The Fall of …
{{id}} {{{paragraph}}}
Example: barber
easuring Ground Resistance — The Fall of …
Spring 20021 The basic procedure for testing Ground electrodesis described by The Institute of Electrical andElectronics Engineers in IEEE Standard #81, IEEER ecommended Guide for Measuring Ground Resistance andPotential Gradients in the Earth. A grounding electrodeis defined as a conductor embedded in the earth, usedfor maintaining Ground potential on conductors con-nected to it, and for dissipating into the earth currentconducted to it. It should be obvious that the effi-ciency of the electrode is inversely proportional to theresistivity of the surrounding earth. Ideally, it wouldbe nice to have a Resistance of zero, but that is notpractically realizable. Values of a fraction of an ohmcan be achieved, however, with appropriate diligenceapplied to the design. A reliable means must, there-fore, be available to test the efficiency of such an in-stallation. Note that while grounding electrodes canvary from a single rod to a grid or array that is severalMeasuring Ground Resistance The fall of potential Methodby Jeff JowettAVO Internationalhundred feet across,the fundamentals oftesting are the are some com-paratively minor con-siderations in tech-nique and procedurethat apply to specific types of electrodes, but the simi-larities far outweigh the differences in testing acrossthe spectrum of electrode most fundamental and general of proceduresis called fall of potential .
Spring 2002 3 A fall of potential test is the most general of methods for meeting the above criteria. It may also be referred to colloquially as a “three-point”
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
Related search queries
Step and Touch Potential Awareness, Potential, Potential rise, The Rise, Fall, & Rebirth Of The 'Emma, The Rise, Fall, & Rebirth of The ‘Emma, Amateur Radio and the Rise, A transformer and how does it, Rise, Global Forum on International Investment 2017, OECD, The Dragon: The Chinese Wine Market, 22 — Africa, 22 Africa