High-voltage power test equipment such as power transformers, transformers, generators, and lightning arresters need to be tested regularly for insulation resistance during long-term use. Therefore, an insulation resistance tester needs to be used. The insulation resistance tester needs to be tested before use. Some preparations.

1. Before the test of the insulation resistance tester, the power supply and all external wires of the tested equipment should be removed, short-circuit the tested equipment, and discharge to the ground for 1 minute. If the capacitance is large, discharge for at least 2 minutes to avoid electric shock and Affect measurement results.

2. Clean the dirt on the surface of the test object with a clean soft cloth. If necessary, clean the surface of the shell with gasoline to eliminate surface leakage current and affect the test results.

3. The high voltage test strip is inserted into the line terminal of the red wire (3), the green connector insertion end (2) GUARD end and the plug end connected to the other end of the probe or fixture under the high voltage conductor device are tested. The sub-wire (green) of the test line to (2) GUARD end (right-hand side), the other end on the high-voltage grommet device under test, to eliminate the effect of leakage current on the surface (see "Use of shielding end" with a black The test wire of the sub-wire is inserted into the ground terminal (ground)

4. Before the test of the insulation resistance tester, the power supply and all external wires of the tested equipment should be removed to make the tested short-circuit and discharge to the ground for 1 minute. If the capacitance is large, discharge for at least 2 minutes to avoid electric shock and Affect measurement results.

5. Clean the surface dirt of the test object with a clean, clean soft cloth. If necessary, clean the surface of the shell with gasoline to eliminate surface leakage current and affect the test results.

6. The high voltage test strip is inserted into the red wire (3) line terminal, the green connector insertion end (2) GUARD end and the other end of the probe or fixture are connected to the plug end of the high voltage conductor device under test. The sub-line (green) of the test line to (2) GUARD end (right-hand side), the other end on the tested high-voltage grommet device, to eliminate the influence of leakage current on the surface (see "Use of shielding end" with a black The sub-wire test wire is inserted into the ground terminal (ground).