The test current of the large ground grid tester is injected into the earth through the current electrode
The large ground grid tester, also known as the ground grid grounding resistance tester or variable frequency grounding impedance tester, is a precision instrument specifically used to measure the grounding impedance and related electrical characteristics of large grounding devices (ground grids) in substations, power plants, communication base stations, etc. It is a key device for ensuring the safe and stable operation of power systems, conducting safety assessments of grounding devices, and performing preventive tests.
