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Grounding resistance tester
Powerfox: ←Created page with ''''Grounding resistance tester''' also called '''Earth tester''' is a is a soil resistance measuring instrument. It is used for sizing and projecting grounding g...'
'''Grounding resistance tester''' also called '''Earth tester''' is a is a soil resistance measuring instrument. It is used for sizing and projecting grounding grids.<ref>[https://ift.tt/35rpa00 circuitglobe.com/]</ref>
[[File:Digital Earth resistance tester.jpg|thumb]]
The first soil resistance measuring instrument were invented in the 50s of XX century [[Megger Group Limited|Evershed & Vignoles Meggers]] made the first insulation and earth resistance testers.<ref>[https://ift.tt/36vyAZW www.richardsradios.co.uk]</ref> One of the most used analog grounding testers in [[USSR]] were М416.<ref>[https://ift.tt/2ttRzWa kiprip.ru/]</ref> From XXI century several companies produced digital earth resistance meters/testers. The main purpose of the instrument<ref>[https://ift.tt/35pw8Tv instrumart.com]</ref> to determine the adequacy of the grounding of an electrical system. By a standard of [[National Electrical Code]]<ref>8PK-ST1520 Digital Earth Resistance Tester Users Manual</ref> the resistance of the soil should be less than 25 Ohms,to reliably and efficiently ground the installation.<ref>[https://ift.tt/2QJo0I8 Radio Museum]</ref>
== Operating principle ==
The meter generates an electrical current and then supplies it to the measuring electrodes.<red>EARTH RESISTANCE RESISTANCE RESISTANCE RESISTANCE TESTER USERS MANUAL </ref> The potential difference between the two electrodes gives information about the value of soil resistance.
== Standartization ==
*IEEE 81-2012
*ГОСТ 22261-94
== References ==
*Earth/ground clamp for measuring earth resistance of electrical installations Philippe Legros
[[Category:Electrical safety]]
[[File:Digital Earth resistance tester.jpg|thumb]]
The first soil resistance measuring instrument were invented in the 50s of XX century [[Megger Group Limited|Evershed & Vignoles Meggers]] made the first insulation and earth resistance testers.<ref>[https://ift.tt/36vyAZW www.richardsradios.co.uk]</ref> One of the most used analog grounding testers in [[USSR]] were М416.<ref>[https://ift.tt/2ttRzWa kiprip.ru/]</ref> From XXI century several companies produced digital earth resistance meters/testers. The main purpose of the instrument<ref>[https://ift.tt/35pw8Tv instrumart.com]</ref> to determine the adequacy of the grounding of an electrical system. By a standard of [[National Electrical Code]]<ref>8PK-ST1520 Digital Earth Resistance Tester Users Manual</ref> the resistance of the soil should be less than 25 Ohms,to reliably and efficiently ground the installation.<ref>[https://ift.tt/2QJo0I8 Radio Museum]</ref>
== Operating principle ==
The meter generates an electrical current and then supplies it to the measuring electrodes.<red>EARTH RESISTANCE RESISTANCE RESISTANCE RESISTANCE TESTER USERS MANUAL </ref> The potential difference between the two electrodes gives information about the value of soil resistance.
== Standartization ==
*IEEE 81-2012
*ГОСТ 22261-94
== References ==
*Earth/ground clamp for measuring earth resistance of electrical installations Philippe Legros
[[Category:Electrical safety]]
January 06, 2020 at 06:27AM
