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Grounding resistance tester single point grounding

time:2021/2/26   source:华天电力  reading:245 time

Method for measuring single-point grounding with a clamp-on ground resistance tester:


A major breakthrough in traditional grounding resistance measurement technology, it is widely used in the grounding resistance measurement of electric power, telecommunications, meteorology, oil fields, construction and industrial electrical equipment. The clamp-on ground resistance tester does not need to disconnect the ground lead wire or auxiliary electrode when measuring the grounding system with loop. It is safe, fast, and easy to use.


Earth Resistance Tester.png


When the clamp-on ground resistance tester measures single-point grounding, it is aimed at a single single point. Usually, the grounding resistance value cannot be directly measured by the meter. It is through auxiliary facilities (through auxiliary points and pulling auxiliary wires to form one or more loops) To measure. Clamp-on ground resistance testers generally test single-point grounding resistance through two-point and three-point methods.


Simple two-point transmission is to find another auxiliary point near a single point, such as a grounded water pipe, a building body, or a natural grounding structure such as a fire hydrant, and then connect the two points through a test line. The resistance value measured by the clamp meter is the series resistance value of the bright spot. This method cannot directly detect the single-point resistance value, but if the detected value is less than the engineering requirement value, then the single-point grounding body is qualified.


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