Currently, in the power system,Grounding resistance test of large grounding networkAt present, the main measurement method is the power frequency high current three pole method. In order to prevent power frequency interference generated during the operation of the power grid and improve the accuracy of measurement results,Insulation preventive testRegulations stipulate that the test current of the power frequency high current method shall not be less than 30 amperes. As a result, there are many problems such as bulky testing equipment, complex testing processes, high workload of testing personnel, and long testing times.

HZDW-D Large Grounding Resistance TesterIt can be used for measuring the grounding network of substations (4 Ω), hydropower plants, microwave stations (10 Ω), and lightning rods (10 Ω). It 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 in the testing process, simplifies the testing operation process, improves the accuracy and precision of the testing results, and greatly reduces the labor intensity and testing cost of the testing personnel.

HZDW-D Large Grounding Resistance TesterSuitable for testing the power frequency grounding impedance and other power frequency characteristic parameters of various grounding devices, as well as soil resistivity. 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 5A, 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.