At present, in the power system, the grounding resistance of the earth grid is mainly measured using the power frequency high current three pole method. In order to prevent power frequency interference during the operation of the power grid and improve the accuracy of measurement results, the insulation preventive test regulations stipulate that the test current of the power frequency high current method shall not be less than 30A. As a result, there are many problems such as bulky testing equipment, complex testing processes, high workload of testing personnel, and long testing times.

The grounding resistance tester for the earth network adopts a new type of variable frequency AC power supply and measures such as microcomputer processing control and signal processing, which effectively solves the anti-interference problem during the testing process, simplifies the experimental operation process, improves the accuracy and precision of the testing results, and greatly reduces the labor intensity and testing cost of the testing personnel.

This instrument is suitable for testing the power frequency grounding impedance, contact voltage, step voltage, and other power frequency characteristic parameters of various grounding devices, as well as soil resistivity. Multi purpose models for measuring substation grounding (4 Ω), hydro thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω).

This instrument adopts cross frequency anti-interference technology, which can accurately measure data at the power frequency of 50Hz in strong interference environments. The maximum test current is 3A, which will not cause the potential of the grounding device to be too high during testing. At the same time, it also has strong anti-interference ability, so it can be measured without power outage.

Product Name: Grounding Resistance Tester for Grounding Grid, Grounding Resistance Tester for Grounding Grid, Large Grounding Resistance Tester for Grounding Grid