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Basic operation of insulation resistance tester

time:2021/5/1   source:华天电力  reading:365 time

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, insulation resistance testers need to be used. Before the equipment is used, some preparations need to be made , Then the basic operation of the insulation resistance tester before the test? This article will give you a brief introduction.


1. Before the test, 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 the 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 of the test line (green) to (2) GUARD end (right-hand side), the other end on the tested high-voltage grommet device, 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)


Insulation Resistance Tester (3).png


4. Before the test, the power supply and all external wires of the tested device should be removed, short-circuit the tested device, and discharge to the ground for 1 minute. If the capacitance is large, discharge it for at least 2 minutes to avoid electric shock and affect the 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-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 sub-wire test wire is inserted into the ground terminal (ground).


Electric workers often need to use an insulation resistance tester in their work. This device is also a very conventional high-voltage power test equipment. Before using this equipment, electric workers must make preparations in place so that they can get twice the result with half the effort.


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