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How to discriminate between true and false transformers in high voltage test
The high-voltage test transformer is the basic test equipment used by the majority of users of power plants, power supply bureaus, and research institutes to conduct AC voltage withstand tests. It has passed the standards of the National Bureau of Quality Supervision for various electrical products, electrical components, and insulation materials. Such as the insulation strength test under the specified voltage, assessment of the product's insulation level, found that the insulation of the test product defects, measure the ability of over-voltage.
At present, the market decides that the quality of high-voltage test transformers is mainly composed of silicon iron pieces, high-voltage bushings, insulating materials, manufacturing processes, and electrical components of the control section. Among them, the quality of ferrosilicon, high voltage bushings, insulating materials, and electrical components is the most important. Silicon wafers are best made of high-twist non-oriented silicon wafers, high-voltage bushings, nylon, epoxy, and silicon rubber, and silicone rubbers are of the highest quality. The prices of test transformers on the market are quite different. In order to pursue the greatest interests, some manufacturers use a large number of inferior materials in materials to injure the majority of users.
1. The use of scrap silicon iron. This kind of material can be purchased at 5000-8000 yuan/ton on the market, and the positive material is about 36,000 yuan/ton, and the price difference between the two is 5-7 times.
2. Electrical materials Electrical components use counterfeit products, the difference between the two is 3-6 times.
3. The difference between high-voltage bushing nylon and silicone rubber is 2 times.
4. Insulation materials are not replaced by other materials instead of good quality telephone paper.
5. Cutting corners in craftsmanship.
How to look at the quality of high voltage test transformer?
1. First, you can go to the factory to see the use of materials, semi-finished products, you can also select a transformer to the factory to immediately request, open to see if the use of scrap silicon iron, if the manufacturers hesitate or not agree with all kinds of reasons, then they Surely use old scraps of silicon iron.
2. Second, the high-voltage test transformer as much as possible to force the high voltage test transformer in all directions repeatedly, and then open the transformer oil valve, down a part of the transformer oil to see if the transformer oil is red or turbid, if the transformer oil is red or turbid. Explain that the manufacturer must have used scrap iron and silicon scraps. A large amount of rust is attached to the scrap silicon iron scraps. These scrap iron scraps with rust cannot be processed in any way. The scrap silicon iron scraps with rust are processed into After the transformer core iron, after immersed in the transformer oil repeatedly washed by the transformer oil, the rust scattered in the transformer oil, so that the transformer oil is red, especially after long-distance transport this phenomenon is more obvious, the rust in the oil on the transformer Insulation causes serious hidden troubles, and the service life of this transformer is certainly not long.
3. The third may also require the manufacturer to conduct a power test. If the no-load current is unqualified, there is a problem with the materials and manufacturing processes used, but no long-distance transport or silicon wafers are visible. The quality of ferrosilicon is best discerned using the above two methods.
4. Look at the materials used for the high-voltage bushings.
5. Look at electrical components.
Dear Customer:
Thank you for your attention to our products. In addition to this product introduction, our company also has vacuum degree tester, infrared thermometer, dielectric loss tester, high voltage test transformer, vacuum oil filter, high current generator, etc. If you are interested in our products, welcome to inquire. Thank you!