Grounding resistance tester

Most facilities have grounded electrical system, so, in a lightning storm or in the process of using the overload voltage, electric current through a safe path into the earth.Grounding electrodes in electrical systems and provides a connection between the channels.In order to ensure reliable grounding, electrical specification, engineering standards and local standards for the grounding electrode often stipulate a minimum impedance.In order to ensure the average run time system, the international association of electrical test every three years to make new rules to specify the grounding electrode test.Grounding resistance tester is indispensable to measurement test grounding resistance and safety inspection tools.

Equipment grounding and total principle and test method are: 3, and 4 potential drop test, can choose testing, no testing pile test and 2 pole.