Dry Type Transformer

Your Professional Dry Type Transformer Supplier

Our goal is to become your true partner in the field of dry type transformer in China. Gnee Steel Group is committed to becoming the world's most internationally competitive supply chain group, meeting the different needs of different customers. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

Why Choose Us

Our services:

In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

Our certification:

Our company has obtained SGS certification. We have also passed ISO9001 and ISO14001 environmental management system certification.

Our capacity:

We have established long-term cooperative relationships with dozens of factories to ensure the production of our products, and our annual export volume exceeds 80,000 tons.

Quality control:

All our products are made of the highest quality materials and are subject to factory inspection, cargo inspection at any time.

Advantages of Dry Type Transformer

Humidity resistance: Dry-type transformers do offer excellent humidity resistance. The absence of oil in these transformers eliminates the risk of oil degradation or insulation breakdown caused by moisture, making them a reliable solution for environments with high humidity levels.

No risk of oil leaking: Unlike oil-filled transformers, dry-type transformers do not contain oil as a cooling and insulation medium. This eliminates the risk of oil leakage, which can be a common cause of maintenance issues and environmental concerns.

Space flexibility: Dry-type transformers are typically smaller and lighter compared to their oil-filled counterparts. This compact size allows for more flexibility in installation, making it easier to position the transformer closer to the consumption points.

Improved efficiency: By installing dry-type transformers closer to consumption points, you can achieve better overall system efficiency.

Simplified installation: Dry-type transformers are designed for easier installation compared to oil-filled transformers. They do not require the construction of oil containment pits or the installation of complex oil cooling systems, which can add to the installation costs.

Enhanced safety: Dry-type transformers are designed with materials that have excellent fire-resistant properties. In the event of an internal fault or overload, the insulation materials used in dry-type transformers are self-extinguishing, meaning they will not sustain or propagate a fire.

Dry Type Transformer Specification

Transformer Type	Dry Type Cast Resin Transformer
Warranty	2 Years
Customization	Yes
Input Voltage	13.8KV
Output Voltage	415V
Frequency	50/60 Hz
Rated Power	800 KVA
Efficiency	Up to 98%
Insulation Class	F
Enclosure Class	IP20
Dimensions	220014001500mm
Weight	2000 kg

Types of Dry Type Transformers

Cast resin dry type transformer (crt):

A cast resin dry type transformer (crt) is a type of transformer that uses epoxy resin to encapsulate its primary and secondary windings. This protects the windings from moisture, dust, corrosion, and other environmental factors that can affect their insulation and performance.

Vacuum pressure impregnated transformer (vpi):

A vacuum pressure impregnated transformer (vpi) is a type of transformer that uses class h polyester resin to impregnate its windings under vacuum and pressure. This eliminates any air gaps or voids in the insulation, enhancing its mechanical strength, dielectric strength, and thermal stability.

Applications of Dry Type Transformer

Chemical, oil, and gas industry: Dry-type transformers are used to supply power to various equipment and processes that involve flammable or explosive substances, such as refineries, petrochemical plants, pipelines, offshore platforms, etc.

Environmentally sensitive areas: Dry-type transformers are used to protect the environment from oil spills or leaks that can contaminate water sources, soil, or wildlife habitats, such as water protection areas, forests, wetlands, etc.

Fire-risk areas: Dry-type transformers are used to prevent fire hazards or minimize fire damage in areas that are prone to fire outbreaks or have strict fire regulations, such as indoor substations, underground substations, hospitals, schools, hotels, shopping malls, etc.

Renewable generation: Dry-type transformers are used to connect renewable energy sources to the grid or to the load, such as wind turbines, solar panels, hydroelectric plants, etc.

Other applications: Dry-type transformers are also used in other applications that require high performance, low maintenance, or special features, such as traction systems, marine systems, mining systems, data centers, etc.

Production Process of Dry Type Transformer

Stamping:

Stamping is an essential step in preparing the transformer core. The core material is cut into the required shape using molds, and during the stamping process, the thickness and loss of the material must be controlled to ensure the magnetic performance of the core.

Winding:

Winding is one of the most crucial steps in the manufacturing of transformers. When handling copper or aluminum wires, it is necessary to choose suitable insulation processes to ensure the insulation performance and mechanical strength of the coils.

Impregnation:

The impregnation process is used to enhance insulation performance and mechanical strength. The wound coils are immersed in an impregnation agent to ensure the continuity and consistency of the insulation layer.

Assembly:

During the assembly phase, various components of the transformer are put together. At this time, careful inspection of the fit between parts is necessary to ensure tightness and the integrity of the insulation barriers.

Testing:

After the transformer assembly is complete, a series of tests must be conducted to verify that its performance meets design requirements. Routine tests include insulation resistance tests, dielectric strength tests, and turns ratio tests.

Three Phase Cast Resin Dry Type Transformer

Dry Type Transformer Storage

Storage areas should be as clean and dry as possible without extreme temperature variations. Protective wrappings should be left intact until the transformer is moved to its permanent location. Dry type transformers stored under damp or dusty conditions must be dried out and cleaned before being installed and energized.

Packing and Shipping of Dry Type Transformer

Packing	Standard export packing (inside:water proof paper,outside:steel covered with strips and pallets)
Shipping	Shipped by road, sea, rail

Other Service of Dry Type Transformer

Delivery time	7 to 15 working days
Payment terms	30%TT for deposit, 70% balance before shipment or LC at sight
Supply ablitity	10000 Ton/ per Month

FAQ

Q: Where are dry transformers used?

A: They are used inside buildings and tunnels, on ships, offshore platforms and cranes, food-processing plant, nuclear plants and mining industry.

Q: What is the difference between dry type and oil type transformer?

A: The key difference between dry-type and oil-type transformers lies in their cooling and insulation methods: dry-type transformers use air or other gases, while oil-type transformers use oil, leading to differences in applications, safety, and maintenance.

Q: What is the difference between wet and dry type transformers?

A: A transformer's location is important when choosing between wet and dry types because it affects safety and noise levels. A wet transformer offers lower noise levels in outdoor and indoor locations, but a dry type is the safest option for an indoor application, such as inside a shopping center or office building.

Q: What is a 3 phase dry type transformer?

A: A three-phase dry-type transformer is a self-cooled transformer that uses two windings and is available in a wide range of primary and secondary voltage combinations. These units are mostly used in industrial applications where there is a need for high power capacity.

Q: Which gas is used in dry type transformer?

A: Oil and air are the primary cooling materials used in a transformer. Dry-type transformers are normally cooled by air. The following two transformer cooling methods are adopted in dry-type transformers. Air Natural (AN) cooling – Cooled by surrounding air.

Q: What is the maximum capacity of a dry type transformer?

A: Traditionally, dry-type transformers are used for distribution and industrial applications with rated power and voltage not higher than 15 MVA and 36 kV. Hitachi Energy now also offers dry-type transformers for the 52 kV and the 72.5 kV voltage class with a power rating of up to 63 MVA.

Q: What is the range of a dry type transformer?

A: Because of improvements in design, materials and manufacturing methods over the past three decades, dry type transformers not only compete with liquid-cooled transformers in the medium voltage range (2.5KV – 34.5 KV) but have significant advantages in many commercial and industrial applications.

Q: How do you maintain a dry type transformer?

A: Remove anything in the area that impedes airflow. Look for dust or dirt accumulation on the surfaces of the transformer. You will need to clean these off after de-energizing the unit. However, the presence of dust indicates that the transformer is in a dusty area that will require inspections every three to six months.

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional dry type transformer manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale dry type transformer at competitive price from our factory. Contact us for customized service. JIS500 Wear Resistant Steel Plate, JIS Low Alloy Steel Plate, NM 600 Wear Resistant Steel Plate