Transformers are a common spare parts product. In the process of purchasing and selecting transformers, there are many things that should be paid attention to. The models or price standards and brand information that should be considered are also different. Similarly, what I recommend to you today is the specific details that you should pay attention to when purchasing a transformer. Starting from this, you can know that transformers can be classified according to materials and processes. Suitable products are well-made and have very clear advantages in terms of longevity, safety skills and efficiency, as you can learn about below. The above recommendations are about the precautions and analysis and comparison instructions during the purchase of transformers.
1. Pay attention when buying a transformer
The biggest reason for the current price difference between conventional transformers depends on whether it is an isolation transformer or an autotransformer. In terms of quality, it seems to be the silicon steel sheets and wire materials used. The craftsmanship and workmanship have very obvious differences in its service life, safety and efficiency.
What is an isolation transformer: An isolation transformer means that the transformer not only has the function of transforming voltage in the power grid, but the primary and secondary are shielded by copper foil, which effectively protects the interference of power grid harmonics on equipment and can also shield the power grid. It has an effect on the third harmonic of the equipment and purifies the power supply. Some precision instruments and equipment and UPS batteries have relatively high requirements on the purity of the power supply. It can have a maintenance effect on the equipment and instruments, especially for UPS, which can greatly improve its use. Life, the most important function is to play a safety isolation effect to prevent electric shock. The primary and secondary generate voltage through electromagnetic induction, which is completely electrically isolated. If you accidentally touch one of the output wires, you will not get an electric shock, but you cannot touch them at the same time. At least two, otherwise your life will be in danger. The transformers currently on the market are generally isolation transformers, unless the customer needs an autotransformer.
What is an autotransformer: There seems to be no difference between an autotransformer and an isolation transformer. The biggest difference in appearance is that the volume and weight are much smaller than that of an isolation transformer, because the input and output of an autotransformer are both on the same line. In addition, the winding is half that of the isolation transformer, and the iron core consumables are much less, so the weight and volume will be much smaller, and it also has the function of transforming voltage, which cannot achieve the effect of safe isolation to prevent electric shock and shield harmonics. In our case Transformers sold by companies generally sell isolation transformers. If you don’t understand, be sure to ask the seller whether the transformer is isolation or auto-coupling. The price can differ by nearly half. Auto-transformers are generally sold as isolation transformers. They are small companies, small workshops, etc. Because their production is not difficult and it is easy to get started, you don’t have to count on the quality and convenience. Generally, the lifespan is 3-5 years. If it causes accidents, electric shocks, damage to equipment, or delays in construction, you have to do it yourself. Responsible, so cheap goods are not good.
2. How to choose?
If you have money, you can choose Schneider and ABB for small single-phase control transformers and machine tool transformers. They do not produce three-phase or high-power ones, and the prices are average. It is 2-3 times that of domestic products. In fact, the quality is similar to that of our domestic products, and they are not high-precision equipment. The cost of purchasing small transformers can be said to account for a large proportion. For example, today there is a BK-1KVA transformer shipped from Shanghai to Yinchuan. The total weight is 17KG. The express delivery fee is 255 yuan for Zhongtong and STO, and 110 yuan for Deppon. My transformer only costs 290. Yuan, if you choose the local minimum shipping fee, you can save tens to thousands of dollars. For domestic high-end products, you can choose some state-owned enterprises, and the price is only about the same as imports. In Shanghai, you can choose old manufacturers such as Shanghai Jinsheng Electrical Equipment Manufacturing Co., Ltd. and Shanghai Gongying Electric Co., Ltd., at least in Shanghai where the subway is now developed. Check out the quality in other factories. If you pay attention to price, you can choose a company in Zhejiang. The price in China is basically the lowest. The price is one-third less than ours and the profit is higher than ours. Why is the price so low? After reading the above information You can understand that Chint and Delixi only produce switching power supplies. Transformers, voltage stabilizers, and voltage regulators are all OEMed by other Zhejiang factories. This is what we mean by high price and low configuration.
From this point of view, we can know that the price of conventional transformers is quite different at present. This is because their working principles and design methods are not the same, and the corresponding process workmanship, service life, safety performance and efficiency are very different. There is an obvious gap, and in the process of selecting transformers, you should first refer to the maturity of their manufacturers' technical scale. For example, I believe that the service life and actual use effect of transformers launched by production institutions with reliable technical scale will not be much worse. , everyone can synthesize the standards in this aspect and understand the details mentioned above, and I believe that we can achieve the final satisfactory effect and purpose.
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