Insulation Resistance Tester

Product introduction:

With the rapid development of China's power industry, preventive experiments on electrical equipment is an important part of ensuring the safe operation and maintenance of power systems. Insulation diagnostics are an important means of detecting insulation faults or failures in electrical equipment. Insulation resistance tester (Megohmmeter) is a special instrument for measuring insulation resistance. JJG662-89 "Insulation Resistance Meter (Megohmmeter)" approved in May 1990 has been used as one of the mandatory verification instruments. At present, electrical equipment (such as transformers, generators, etc.) is developing toward a trend of increasing capacity, increasing voltage, diversifying structures, and sealing. This requires the insulation resistance tester itself to have large capacity, strong anti-interference ability, diversified measurement indicators, accurate measurement results, simple and rapid measurement process, and easy to carry. For the electrical equipment with large capacity, the two kinds of insulation indexes of absorption ratio and polarization index should be tested. In China's "500KV Regulations", the polarization index index has been listed as a preventive test project for 500KV transformers and reactors. .
The GH-6302A Insulation Resistance Tester is designed for testing insulation tests in the laboratory or on site. It contains high-precision micro current measurement system and digital boost system. It only needs to connect the test piece with a high voltage line and a signal line to measure. The GH-6302A insulation resistance tester is automatically measured and the result is displayed on a large screen LCD and the results are stored.

Insulation resistance tester operating part function analysis:

First, the operation component function analysis:
1.L terminal "L" is the high-voltage output terminal, called the line end, which is led by the high-voltage cable to the line to be tested, for example, to the motor winding and cable core.
2. The G terminal "G" is called the shield end and is used for measuring the volume resistance of the insulating material or cable by the three-electrode method. It is connected to the protective ring end of the three electrodes.
3. The E terminal "E" is called the ground end and is connected to the ground and zero end of the measured object. For example, motor housing metal, transformer core, cable shield.
Second, note and other please pay attention to safety, L is the high pressure end! E is the ground, it must be connected to the earth!
three. External interference After the high-insulation material is added with DC voltage, the current passing through the sample is very small, which is highly susceptible to external interference and causes large test errors. The thermoelectric potential and the contact potential are generally small and negligible; the electrolytic potential is mainly caused by the contact of wet samples with different metals, which is only about 20 mV. Moreover, the relative humidity is required to be low in the static test. When testing in a dry environment, Eliminate the electrolysis potential. Therefore, the external disturbance is mainly the coupling of stray current or the potential generated by electrostatic induction. When the test current is less than 10-10A or the measured resistance exceeds 1011 ohms; the tested sample, test electrode and test system shall adopt strict shielding measures to eliminate the influence of external interference.

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Yangzhou Qianyuan Electric Equipment Manufacturing & Trade Co. Ltd is specialized in manufacturing and trade of electric power line transmission tools. Our main products are Anti-twisting Steel Wire Rope,Stringing Pulley,Hydraulic Crimping Compressors,Engine Powered Winch,Motorised Winch,Wire Grip,Gin Pole,Cable Stand,Mesh Sock Grips,Cable Conveyor,Lever Chain Hoists and so on,which are mainly supplied to power companies,railroad companies and other industry fields.

All our products are certified by China National Institute.
To assure the quality, we will do 100% inspection for raw material, production procedure, packing before shipment,
so we do have the confidence to supply customers with high-quality and high-efficiency products.
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Yangzhou Qianyuan Electric Equipment Manufacturing & Trade Co.Ltd , https://www.qypowerline.com