GGT500 - Ground/Earth Grid Tester
Ground Grid Tester GGT500 is the newest test set, specially designed for inspection of substation ground grid. During a measurement the instrument generates 300 A in time period of 60 s or longer. During the test current and voltage drop are measured and displayed simultaneously .
The test is performed with single set of current cables. One cable is connected to the referent grounding point in substation, and the second cable is connected to the testing ground point in the substation. With additional current clamps, current flow through the grounding is being inspected. Based on the current values measured with current clamps the state of the ground grid under the substation can be determined.