The grounding resistance tester under UHV power can help many power workers conduct various power tests more conveniently.

(1) Firstly, check whether the current wire, voltage wire, and ground wire used for testing are disconnected (measured with a multimeter), whether the rust on the ground pile is cleaned up, and whether the burial depth is appropriate (>0.5m). At the same time, check whether the connection between the test wire and the ground rod is well connected. If not connected, please handle it before reconnecting.

(2) The length ratio of the current test line to the voltage test line is 1:0.618, and the length of the current test line should be 3-5 times the diagonal of the grounding grid.

(3) Connect one end of the current test line and voltage test line to the instrument according to the specified length and discharge them in parallel. The other end is connected to two ground stakes respectively.

(4) Check the placed test wire, connect one end of the multimeter to the current or voltage wire, and the other end to the ground wire. If there is no resistance, it is an open circuit. Confirm that it is intact and retest.

(5) After checking the connection, connect the AC 220V/50Hz power supply to the instrument and turn on the instrument power.

(6) Press the measurement button to start measuring.

(7) After the instrument displays the test, record the test data (the instrument can repeat the measurement multiple times).

(8) After turning off the instrument power, disconnect the connection and the testing process ends.