A transformer stands for a device that can transform energy from one circuit to another. There are various types of transformers manufactured for different purposes. One such type is the dry-type transformer. This blog will briefly explain and guide you through many aspects of dry-type transformers. Also, it will cover some significant queries regarding this transformer type.
What is a Dry Type Transformer?
A dry transformer is a type of electrical transformer that functions by using gas or air as an insulating medium rather than liquid. An air-core transformer is another name for it that is occasionally used. Dry transformers differ significantly compared to their counterparts, which are filled with fluid or oil.
To start, the absence of a liquid reduces the chances of leaks or catching fire, making dry transformers more robust and efficient than oil-filled transformers. Moreover, periodic dry transformer maintenance is more straightforward and less expensive since there is no requirement to check or replace the oil.
Unlike oil-filled transformers of the same rating, dry transformers appear lighter and smaller for a given power specification.
What are the types of dry-type transformers?
Cast Resin Transformer: Cast resin transformer is a popular type of dry transformer known for its durability and excellent insulation. Because the windings are covered in epoxy resin, they are shielded from dust, moisture, and other contaminants. These transformers are perfect for corrosive atmospheres or high humidity conditions.
Vacuum Pressure-Impregnated Transformers: VPI transformers utilize a vacuum pressure impregnation process to saturate the windings with the help of epoxy resin. By using this technique, the thermal conductivity and insulation are improved, making them appropriate for heavy-duty uses. When dependability is essential, VPI transformers are frequently utilized in commercial and industrial contexts.
Open wound transformers: The exposed windings of open-wound transformers are air-cooled. They are usually utilized in controlled environments, like clean rooms or places with low levels of pollutants and dust. These transformers are an affordable choice for some applications because they are simple to maintain and inspect.
Advantages of Using This Transformer
Dry-type transformers have many advantages over oil-filled counterparts, making them a great option for many applications. The main benefits are:
Safety: Unlike transformers that are filled with oil, dry-type transformers don't present the risk of oil leakage, thus reducing the chance of fire-related incidents and environmental hazards.
Low Partial Discharge: Partial discharge is a situation where insulation degradation takes place due to any small gaps or voids and discharge of electricity. However, in dry-type transformers, it is less likely to occur as the winding materials are surrounded by solid things to avoid any gaps.
Eco-friendly: Clean-type transformers are not contaminated with oil, which makes them more environmentally green and less difficult to get rid of after their lives.
Low Maintenance: Since there is no oil to replace or monitor, dry-type transformers require only minimum maintenance, which means lower operating costs over time.
Compact Design: Dry-type transformers tend to be lighter and more compact than oil-filled transformers, which makes them ideal for installations where there is limited space.
Improved fire resistance: The lack of flammable oil significantly decreases the chance of fire, which makes dry-type transformers safer, especially for indoor use.
Non-hygroscopic: These transformers are usually non-hygroscopic which means they don’t capture moisture from air, preventing the chances of corrosion.
Applications
The transformers are ideal for a wide range of applications such as -
Underground substations: Dry-type transformer is ideal for installation in underground substations as it offers a compact and secure solution. Makpowert’s dry-type transformers allow efficient cooling and reliable performance in confined spaces which makes them ideal for urban and high-density areas.
Chemical plants: These transformers can effectively match the demanding environment of a chemical plant. Their robust configuration and resistance mechanism to harsh conditions ensure safe and smooth operation.
Solar and wind power: As these transformers support renewable energy initiatives, they are ideal for efficient power conversion for solar and wind power installations.
High-rise buildings: Unique requirements met by dry-type transformers are advantageous for high-rise structures. For urban buildings, where space is at a premium and safety is of utmost importance, their small size and secure functioning are essential.
High-Safety locations: Areas like oil rigs, and mines have high safety standards, and Makpowert’s dry-type transformers are manufactured to meet those safety requirements. This construction ensures reliable performance by minimizing threats.
Maintenance
Maintaining a dry-type transformer is very important and simple. Regular maintenance and inspection are essential to ensure optimal performance and longevity.
Visual Inspections: Performing routine visual inspections can assist in spotting any indications of contamination, wear, or damage. Inspect for fractures, fading, or indications of overheating.
Cleaning: Make sure there is no dust or debris around the transformer and its surroundings. This keeps the cooling system operating efficiently and keeps impurities from building up.
Thermal Scanning: Regular thermal scanning can identify hotspots or trouble spots that could be signs of impending problems. This proactive strategy aids in avoiding unanticipated failures.
Electrical Testing: To make sure the transformer works within its designated parameters, perform routine electrical tests such as turn ratio and insulation resistance tests.
That’s it!
A dry-type transformer is a safe, efficient, and eco-friendly solution for any power distribution needs in an industry. Its advantages include enhanced safety, minimal maintenance, and effective fire resistance, making it an excellent choice for various applications.
Makpower Transformer, with their expertise and commitment to quality, can readily manufacture transformers for all your industrial requirements.
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