Hey there! As a supplier of dry type transformer series, I'm super stoked to share with you the quality control measures we take to ensure top - notch products.
First off, let's talk about the raw materials. We know that the quality of raw materials is the foundation of a great dry type transformer. We source our materials from trusted suppliers only. For the core, we use high - grade silicon steel sheets. These sheets have low core loss, which means less energy is wasted as heat during the transformer's operation. We conduct strict inspections on every batch of silicon steel sheets. We check the thickness, magnetic properties, and surface quality. Any sheets that don't meet our standards are sent back immediately.
When it comes to the windings, we use high - quality copper or aluminum conductors. Copper conductors are preferred for their excellent electrical conductivity. Before using them, we measure the resistivity, diameter, and insulation quality. For example, we use specialized equipment to measure the resistivity to make sure it's within the acceptable range. This ensures that the windings can carry the required current without overheating.
During the manufacturing process, we have a series of in - process quality control steps. Our production line is equipped with advanced monitoring systems. For instance, when the core is being assembled, we use sensors to check the alignment of the silicon steel sheets. Any misalignment can cause uneven magnetic flux, which will affect the performance of the transformer. If the sensors detect a problem, the assembly process is stopped immediately, and the issue is corrected.
We also pay close attention to the winding process. The number of turns, the way the windings are wound, and the insulation between the windings are all crucial factors. We use automated winding machines that are programmed to ensure accurate winding. After each layer of winding is completed, we perform insulation resistance tests. This helps us detect any potential short - circuits or insulation breakdowns early on.
Another important aspect is the impregnation process. After the windings are completed, they are impregnated with a special insulating resin. This resin helps to improve the insulation performance and mechanical strength of the windings. We control the temperature, time, and pressure during the impregnation process very carefully. For example, if the temperature is too high, the resin may cure too quickly, resulting in poor penetration. If the pressure is not right, there may be voids in the resin, which can reduce the insulation quality.
Once the transformers are assembled, we conduct a series of final tests. One of the most important tests is the no - load test. In this test, we apply rated voltage to the primary winding while the secondary winding is open - circuited. We measure the no - load current and power loss. This helps us determine the core loss and the excitation characteristics of the transformer. If the no - load current is too high, it may indicate problems such as short - circuited turns in the windings or a defective core.
The short - circuit test is another critical test. In this test, we short - circuit the secondary winding and apply a reduced voltage to the primary winding. We measure the short - circuit current and power loss. This test helps us determine the copper loss and the impedance of the transformer. The impedance is an important parameter as it affects the voltage regulation and the short - circuit withstand ability of the transformer.
We also perform dielectric tests to check the insulation strength of the transformer. We apply a high voltage to the windings for a certain period of time. If there is any insulation breakdown during the test, the transformer fails the test and needs to be re - worked.
In addition to these electrical tests, we also conduct mechanical tests. We check the tightness of the bolts and the overall mechanical structure of the transformer. A loose bolt can cause vibration and noise during operation, which may also lead to long - term damage.
Now, let me introduce some of our popular dry type transformer models. We have the Nx1 Dry - type Transformer, the Nx2 Dry - type Transformer, and the Nx3 Dry - type Transformer. These transformers are designed with the latest technology and undergo the same strict quality control measures as mentioned above.
If you're in the market for dry type transformers, you can rest assured that our products are of the highest quality. Our quality control measures are designed to ensure that every transformer we supply meets or exceeds industry standards. Whether you need a small - scale transformer for a residential application or a large - scale one for an industrial project, we've got you covered.
If you're interested in our dry type transformer series and want to discuss your specific requirements, feel free to reach out to us. We're always happy to have a chat and work out the best solution for you.
References:
- Electrical Power Transformer Engineering by Turan Gönen
- Transformer Design Principles: With Applications to Core - Form Power Transformers by John J. Winders
