Dry Type Transformer

VKE: Leading Dry Type Transformer Manufacturer

Founded in 2003, Jiangsu VKE Transformer Co., Ltd. is a professional manufacturer of high-quality compact substation. Our facility adopts a full-process layout that seamlessly connects each step - from raw materials to finished products - to achieve a smooth workflow. We are committed to becoming your trusted partner.

Why Choose Us

Quality Assurance

VKE employs industry-leading automated testing systems to conduct full life-cycle monitoring for every transformer. The combination of precision instruments and digital platforms ensures that our products meet strict quality standards and custom requirements.

One-Stop Service

VKE ensures that every transformer we deliver undergoes rigorous quality checks. We offer a one-stop service, including quotation, manufacturing, installation, commissioning, and training.

Production Capacity

With two production bases covering 33,660 m² and a dedicated team of 110+ employees, we achieve an annual production capacity of 6,000 MVA.

Global Certification

We are IEC, CE, UL and regional safety certified. With high-performance products and top-quality service, our products are sold in many countries and regions worldwide.

Types of Dry Type Transformer

Dry Type Power Transformer: The dry type power transformer produced by VKE has been applied in an increasing number of industries due to its energy-saving, high-efficient, safe and environment-friendly features.

Amorphous Alloy Dry Type Transformer: VKE amorphous alloy dry type transformer achieves ultra-low no-load losses through its amorphous core. Combined with oil-free design, it provides users with an efficient, safe, reliable and cost-effective power solution throughout the entire life cycle.

H Class High Temp Resistant Dry-type Transformer: These transformers is custom-designed for the high-temperature workshop condition of a customer’s steel plant, offering a 60% longer service life compared to conventional products.

Low-loss Energy-efficient Dry-type Transformer: Our transformers adopt advanced materials and optimized design to reduce no-load and load losses, achieving up to 30% higher efficiency compared to conventional transformers.

Epoxy Resin Dry Transformer: Epoxy resin dry transformer uses epoxy resin as the primary insulating material. The windings are encapsulated in epoxy resin through vacuum casting or winding processes, creating a solid-state insulation structure that eliminates the need for insulating oil.

Technical Parameters

Rated Capacity(kVA)	Vector Group	Voltage Combination(kV)	No-load Current(%)	No-load Loss(W)	On-load Loss(W)	Short-circuit Impedance(%)
500	Dyn11	6-11±2*2.5%/0.4	1.0	1160	4590	4.0
		20-24±2*2.5%/0.4	1.1	1350	5460	6.0
		33-38.5±2*2.5%/0.4	1.1	1620	6270	6.0

Advantages of Dry Type Transformer

Enhanced Safety: Dry-type transformers are less likely to cause a fire or explode, making them a safer option that doesn’t require a fire-proof enclosure.

Maintenance-free: They require no oil changes or oil tests, reducing maintenance costs and environmental impact.

Easy Installation: These transformers can be installed close to the load, reducing the need for lengthy and costly low-voltage cables.

Reduced Pollution: You can reduce pollution and environmental risks such as leaks and spills when you use a dry-type transformer.

Overload Support: They have better heat dissipation and thermal endurance than oil-filled transformers, supporting overloads effectively.

Easy Inspection: Dry-type transformers are easier to inspect. You can easily remove the coils and connections to see the transformer’s components.

Insulation Classes for Dry Type Transformer

Class of Insulation	Class of Temperature Resistance	Winding Temperature Rise Limit	Hotspot Temperature	Insulation Materials
A	105℃	60K	105℃	Impregnated paper, cotton yarn, magnet wire
E	120℃	75K	120℃	PET film, poxy resin
B	130℃	80K	130℃	Mica, fiberglass (reinforced)
F	155℃	100K	155℃	High-temperature epoxy resin, Nomex® paper
H	180℃	125K	180℃	Silicone rubber, polyimide, mica
C	>180℃	Design-dependent	>180℃	Ceramic, PTFE, advanced composite materials

Application of Dry Type Transformer

Commercial Buildings: Dry-type transformers are commonly used in commercial buildings such as office complexes, shopping malls, and hospitals. Their low fire risk and maintenance-free operation make them ideal for indoor installations with critical space and safety.

Industrial Facilities: In industrial settings, dry-type transformers are often used to supply power to machinery and equipment. Their ability to handle high voltage and harsh operating conditions ensures they can reliably meet the demands of heavy-duty applications.

Renewable Energy Systems: Dry-type transformers, including wind and solar power plants, are crucial in renewable energy systems. Their environmentally friendly design aligns with the green energy goals of these installations, while their efficiency and durability help maximize energy output.

Data Centers: Data centers require highly reliable power distribution systems to ensure continuous operation. Dry-type transformers are preferred in these settings due to their low maintenance needs, high efficiency, and reduced fire risk, which are vital in protecting sensitive electronic equipment.

Residential Areas: In residential areas, dry-type transformers are used for power distribution in apartment complexes and housing developments. Their quiet operation and compact design make them suitable for locations where space is limited and noise must be minimized.

Installation Requirements

Select a Suitable Installation Location

Install dry-type transformers in well-ventilated, dry areas free from corrosive gases and dust.

Foundation Preparation

The transformer foundation must be level, stable, and constructed with embedded steel plates that are flat and free from voids.

Positioning and Fixing

Position the transformer using a crane or temporary wooden rails. Ensure the crane’s load capacity matches the transformer's weight.

Electrical Wiring

Ensure adequate clearance between live parts and from live parts to the ground. After wiring, verify that all connections are secure and compliant with standards.

Grounding Requirements

Connect the transformer’s designated grounding bolt to the protective grounding system. After installation, measure and verify grounding resistance using professional instruments and schedule regular inspections.

Inspection and Commissioning

Before energizing, conduct thorough checks of appearance, wiring, grounding, and electrical parameters. Only after all parameters are confirmed stable should load operation begin.

Environmental Considerations

Choose the appropriate structure and cooling method based on transformer capacity and usage conditions to ensure efficient operation.

Production Process

01/

Core Cutting: Silicon steel is cut into required shape using molds.

02/

Core Cutting: Silicon steel is cut into required shape using molds.

03/

Core Assembly: High-quality materials effectively reduce the no-load loss and noise level.

04/

Winding: Copper/aluminum wires, winding methods/structures are selected based on design requirements.

05/

Final Assembly: Meticulously assemble all components & carefully inspect the fit between parts.

06/

Testing: Routine tests must be conducted to verify that the transformers' performance meets design requirements.

07/

Final Checks: A comprehensive final inspection before leaving the factory.

08/

Delivering: Efficient packing & delivery handled by trusted logistics partners.

Customization Process

Consultation and Contact

Reach out to us via email, phone, or our website to discuss your specific requirements and project goals.

Design Confirmation

We will create a basic design plan based on your requirements and confirm the specific design details with you.

Quotation and Agreement

Provide a detailed quotation, discuss, and sign the mutual agreement to finalize the project details.

Payment Confirmation

Make the payment to confirm the development project. 30% deposit in advance, 70% balance against the copy of B/L..

Manufacturing

We start the manufacturing process and oversee progress to ensure timely production. This helps us maintain efficiency and meet deadlines.

Logistics and Delivery

Together, we conduct the final acceptance to verify that the transformer meet your quality standards and requirements. By doing so, we ensure everything aligns with your expectations.

Shipping and Delivery

Payment Terms	We accept LC, T/T,Western Union, PayPal and so on. If others, we can discuss.
Delivery Time	Usually it will take about 30 days after order confirmed.
Package	Wooden Box Packaging: Ensures safety during transportation with fumigated logs and steel corner reinforcements to prevent damage. Wooden Pallet Packaging: Provides a cost-effective solution for sea transportation, ensuring transformers are securely fastened with straps and wrapped in protective film.
Transportation	For small package, we will send it by Express, such as DHL,FedEx,,UPS,TNT,EMS. For big package, we will sent you by sea , air or train.

Our Certificates

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FAQ

Q: Which gas is used in a dry type transformer?

A: A dry type transformer, as the name suggests, is a transformer that does not require liquid, such as oil, for cooling. Instead, they utilise air or other gases for insulation and cooling purposes.

Q: How does humidity affect dry type transformers?

A: A dry type transformer offers several advantages, including increased reliability, extended lifespan, and enhanced performance. Without proper dehumidification, the transformer's insulation may become saturated with moisture, leading to electrical failures and reduced efficiency.

Q: How do you maintain a dry type transformer?

A: Look for adequate ventilation around the transformer. 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.

Q: How to ground a dry type transformer?

A: Where separate equipment grounding conductors and supply-side bonding jumpers are installed, a terminal bar for all grounding and bonding conductor connections shall be secured inside the transformer enclosure.

Q: Why is my dry type transformer buzzing loudly?

A: While some transformers can provide decades of reliable use, all units wear out in time. As a transformer ages, the windings and insulation can come apart, enhancing the humming noise that occurs when vibrating.

Q: What is the spacing for a dry type transformer?

A: For all dry-type transformers, efficient cooling relies on unrestricted air circulation. It is crucial to maintain a minimum clearance of 6 inches (152.4 mm) between any side of a transformer with ventilated openings and any nearby wall or obstruction, as specified by UL 1561 guidelines.

We're professional dry type transformer manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to buy dry type transformer for sale here from our factory. For price consultation, contact us.

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