China Dry Type Transformer Manufacturer: Factory Overview, Certifications & Export Guide 2026

Time：2026-07-27    Auther：ZTelec-www.ztelectransformer.com

Dry type transformers have become one of the most important solutions in modern electrical distribution systems due to their high safety, excellent reliability, and low maintenance requirements. Unlike oil filled transformers, dry type transformers use solid insulation materials such as epoxy resin, cast resin, or advanced composite insulation systems instead of liquid dielectric oil.

Because they eliminate the risk of oil leakage and reduce fire hazards, dry type transformers are widely used in industrial facilities, commercial buildings, data centers, renewable energy projects, hospitals, metro systems, and urban power distribution networks.

In recent years, China has become one of the world’s largest manufacturing bases for dry type transformers. Chinese transformer factories combine advanced production technology, strong supply chains, competitive manufacturing costs, and international certification capabilities to provide reliable solutions for global customers.

This 2026 guide provides a complete overview of China dry type transformer manufacturers, including factory capabilities, manufacturing processes, certifications, quality testing, export markets, and key factors buyers should consider when sourcing transformers from China.

Why Choose Dry Type Transformers from China?

China dry type transformer manufacturers have gained strong recognition in global markets because they offer a combination of competitive pricing, manufacturing flexibility, and compliance with international electrical standards.

For international buyers, sourcing dry transformers from China provides several important advantages:

Competitive Manufacturing Cost

One of the biggest advantages of Chinese dry type transformer factories is cost efficiency. China has developed a complete electrical equipment supply chain covering silicon steel cores, copper and aluminum conductors, epoxy resin materials, insulation components, transformer accessories, and testing equipment.

Large-scale production allows Chinese manufacturers to reduce manufacturing costs while maintaining stable product quality. Compared with suppliers from Europe, North America, and Japan, Chinese factories can usually provide more competitive pricing for medium voltage dry type transformers and cast resin transformers.

For global projects requiring multiple transformer units, the cost advantage of purchasing directly from China can significantly reduce overall procurement expenses.

Advanced Dry Type Transformer Manufacturing Technology

Leading China dry type transformer manufacturers have invested heavily in automated production equipment, digital manufacturing systems, and advanced testing laboratories.

Modern factories typically use CNC winding machines, automatic vacuum casting systems, precision core cutting equipment, temperature-controlled curing ovens, and computer-based testing systems to ensure product consistency.

Manufacturers producing SCB series cast resin transformers, medium voltage dry transformers, and special application transformers can provide customized solutions according to different project requirements.

Compliance With International Standards

Professional dry type transformer factories in China manufacture products according to international standards including IEC 60076 series, IEC 60076-11 for dry type transformers, UL standards for North American markets, CE requirements for European markets, and ISO quality management systems.

Many export-oriented manufacturers have experience supplying transformers for international projects in Southeast Asia, the Middle East, Africa, Europe, North America, and South America.

Wide Range of Customization Options

A major advantage of Chinese transformer manufacturers is their ability to customize products according to specific electrical and environmental requirements.

Customers can request customized solutions including rated capacity, voltage ratio, insulation class, enclosure protection level, cooling method, noise requirements, and installation conditions.

Common customized products include:

11kV dry type transformers for industrial distribution systems.

33kV medium voltage dry type transformers for renewable energy and utility applications.

SCB cast resin transformers for commercial buildings and data centers.

Low noise dry transformers for hospitals, residential buildings, and urban substations.

Shorter Production Lead Time

Compared with many overseas suppliers, Chinese transformer factories generally provide shorter production cycles due to efficient supply chains and large manufacturing capacity.

For standard dry type transformer models, production normally takes around 4–8 weeks depending on capacity, voltage level, and configuration. Customized transformers may require approximately 8–12 weeks for engineering design, production, and testing.

Strong Global Export Experience

Chinese dry type transformer suppliers have extensive experience serving international electrical projects. Export products are commonly used in:

Power distribution networks, industrial plants, solar power stations, wind farms, mining projects, transportation systems, commercial complexes, and infrastructure developments.

Experienced exporters understand international requirements including technical documentation, packaging standards, shipping procedures, and destination country regulations.

China Dry Type Transformer Factory Capabilities

A reliable dry type transformer manufacturer in China should have strong engineering capability, modern production facilities, complete testing equipment, and international project experience.

When selecting a transformer factory, global buyers should evaluate the following key manufacturing capabilities.

Engineering and Design Capability

Professional manufacturers usually have experienced electrical engineers who can design transformers according to customer specifications and application requirements.

Engineering teams are responsible for:

Transformer electrical calculation, electromagnetic design, thermal analysis, insulation coordination, structural design, and customized solution development.

Advanced manufacturers also use simulation software to optimize transformer performance before production, helping reduce losses, noise levels, and temperature rise.

Complete Production Facilities

A qualified China dry type transformer factory normally includes dedicated production areas for:

Transformer core manufacturing, winding production, epoxy resin casting, assembly, drying, painting, and final testing.

Modern factories may include:

Automatic foil winding machines, vacuum pressure casting systems, CNC processing equipment, clean casting rooms, and computerized testing laboratories.

Dry Type Transformer Product Range

Chinese manufacturers typically offer a wide product range covering different voltage levels and applications.

Common products include:

SCB10, SCB11, SCB13, SCB14 and SCB18 cast resin dry type transformers.

6kV, 10kV, 11kV, 20kV and 35kV medium voltage dry transformers.

Distribution dry transformers from 50 kVA to 5000 kVA and above.

Special transformers for solar power plants, wind energy projects, rail transit systems, and industrial applications.

Leading China Dry Type Transformer Manufacturers (2026 Overview)

China has many transformer manufacturers serving domestic and international markets. The most suitable supplier depends on project requirements, certification needs, voltage level, and budget.

Premium International Manufacturers in China

Some multinational electrical equipment companies operate manufacturing facilities in China and supply high-end transformer solutions worldwide.

These companies usually focus on advanced technology, digital monitoring systems, smart grid applications, and projects requiring strict international certification.

Professional Chinese Transformer Export Manufacturers

Many Chinese-owned transformer factories specialize in export markets and provide competitive solutions for global customers.

These manufacturers typically offer:

IEC compliant dry type transformers, SCB cast resin transformers, customized voltage solutions, OEM production, private labeling, and complete export services.

How to Evaluate a China Dry Type Transformer Factory

Before placing an order, international buyers should evaluate several important factors:

Factory production capacity, transformer testing capability, certification records, export experience, engineering support, customer references, and after-sales service.

A reliable manufacturer should be able to provide technical drawings, test reports, factory inspection documents, and certification documents before shipment.

Dry Type Transformer Manufacturing Process in China

Professional China dry type transformer factories follow strict manufacturing procedures to ensure electrical performance, mechanical strength, insulation reliability, and long service life. From engineering design to final inspection, every production stage is controlled according to international transformer manufacturing standards.

The manufacturing process of a cast resin dry type transformer or medium voltage dry transformer normally includes engineering design, core production, winding manufacturing, resin casting, assembly, and comprehensive testing.

Step 1: Engineering Design and Technical Preparation

Before production begins, engineers analyze customer requirements including rated capacity, primary voltage, secondary voltage, frequency, insulation class, protection level, cooling method, and installation environment.

Professional transformer manufacturers use advanced design software to optimize electrical performance and thermal characteristics.

The engineering process includes:

Electrical calculation for load capacity and efficiency.

Magnetic circuit design to reduce no-load losses.

Thermal simulation to control temperature rise.

Insulation coordination design according to IEC 60076 requirements.

Mechanical structure design for transportation and short-circuit resistance.

Step 2: Transformer Core Manufacturing

The transformer core is one of the most important components affecting energy efficiency and operating losses.

Chinese dry type transformer factories usually use high-quality grain-oriented silicon steel sheets to manufacture transformer cores.

The core production process includes:

Precision cutting of silicon steel laminations to reduce magnetic losses.

Step-lap core stacking technology to improve magnetic performance.

Clamping and fixing processes to increase mechanical stability.

Core grounding inspection to ensure electrical safety.

High-quality core manufacturing helps reduce no-load losses, noise levels, and vibration during transformer operation.

Step 3: Winding Manufacturing Process

The winding system directly affects transformer efficiency, temperature rise, and short-circuit performance.

Depending on customer requirements, manufacturers use copper or aluminum conductors for high-voltage and low-voltage windings.

The winding process includes:

Conductor preparation and insulation treatment.

Automatic winding with precise tension control.

Interlayer insulation installation.

Vacuum drying to remove moisture.

Electrical resistance measurement before assembly.

Step 4: Epoxy Resin Casting Process

Cast resin dry type transformers use epoxy resin insulation technology to provide excellent mechanical strength and environmental protection.

During the vacuum casting process, epoxy resin completely surrounds the high-voltage winding, creating a solid insulation structure.

The resin casting process provides several advantages:

High resistance to moisture and dust.

Excellent fire safety performance.

Strong mechanical protection against short-circuit forces.

Stable operation in harsh environments.

Step 5: Transformer Assembly

After core and winding production, the transformer enters the assembly stage.

Main assembly procedures include:

Core and winding installation.

High-voltage and low-voltage terminal connection.

Temperature sensor installation.

Cooling fan installation for forced air cooling systems.

Enclosure assembly according to IP protection requirements.

Step 6: Factory Testing and Final Inspection

Before shipment, every dry type transformer manufactured in China must pass comprehensive testing procedures to verify safety and performance.

Professional factories perform routine tests, type tests, and special tests according to customer requirements and international standards.

Dry Type Transformer Certifications and International Standards

Certification is one of the most important factors when purchasing dry type transformers from China. International buyers need to ensure that the transformer manufacturer can provide products that comply with the regulations of the target market.

IEC 60076-11 Dry Type Transformer Standard

IEC 60076-11 is the main international standard specifically covering dry type power transformers.

It defines requirements related to:

Electrical performance.

Temperature rise limits.

Insulation systems.

Fire behavior classification.

Testing procedures.

Most export-oriented China dry type transformer manufacturers design their products according to IEC 60076 series standards.

IEC 60076 Transformer Standards

The IEC 60076 series provides comprehensive technical requirements for power transformers.

Important standards include:

IEC 60076-1: General requirements for power transformers.

IEC 60076-2: Temperature rise requirements.

IEC 60076-3: Insulation levels and dielectric tests.

IEC 60076-5: Ability to withstand short circuit.

IEC 60076-10: Determination of sound levels.

IEC 60076-11: Requirements for dry type transformers.

UL Certification for North American Markets

For transformers exported to the United States and Canada, UL certification is often required for commercial and industrial applications.

UL 1561 is commonly referenced for dry type general-purpose and power transformers.

UL certification demonstrates that the transformer has passed safety evaluations related to:

Electrical insulation.

Fire resistance.

Material safety.

Temperature performance.

CE Certification for European Markets

Dry type transformers supplied to European markets generally require CE compliance.

CE marking indicates conformity with applicable European safety, health, and environmental protection requirements.

For European projects, buyers commonly request CE documentation together with IEC test reports and factory quality certificates.

ISO Management System Certifications

Reliable China dry type transformer manufacturers usually maintain international management certifications including:

ISO 9001 Quality Management System.

ISO 14001 Environmental Management System.

ISO 45001 Occupational Health and Safety Management System.

These certifications demonstrate that the factory follows standardized production and quality control procedures.

Dry Type Transformer Testing Procedures Before Shipment

Testing is a critical part of transformer manufacturing. A professional Chinese transformer factory should have complete testing equipment and provide official test reports before delivery.

Routine Tests

Routine tests are performed on every transformer unit before shipment.

Typical routine tests include:

Winding resistance measurement.

Voltage ratio verification.

Vector group testing.

No-load loss measurement.

Load loss measurement.

Insulation resistance testing.

Dielectric withstand test.

Type Tests

Type tests verify the design performance of a transformer model and are usually performed on representative units.

Common type tests include:

Temperature rise test.

Short-circuit withstand test.

Lightning impulse test.

Noise level measurement.

Partial discharge test.

Special Tests for Advanced Applications

For special projects such as data centers, renewable energy plants, rail transit systems, and offshore facilities, customers may require additional tests.

Examples include:

Partial discharge testing for high reliability applications.

Seismic testing for earthquake regions.

Environmental testing for high humidity or corrosive environments.

Low noise testing for urban installations.

Quality Control System of China Dry Type Transformer Factories

Leading Chinese transformer manufacturers implement quality control throughout the entire production process instead of relying only on final inspection.

Incoming Material Inspection

All major raw materials are inspected before entering production.

Inspection items include:

Silicon steel sheet magnetic properties.

Copper conductor purity and conductivity.

Epoxy resin performance.

Insulation material thermal resistance.

Production Process Control

During manufacturing, quality engineers monitor:

Core dimensions and stacking accuracy.

Winding tightness and insulation condition.

Resin casting quality.

Assembly accuracy.

Electrical connection reliability.

Final Factory Acceptance Inspection

Before export shipment, transformers are inspected according to customer requirements.

The final inspection normally includes:

Appearance inspection.

Dimensional verification.

Nameplate confirmation.

Test report review.

Packaging inspection.

For large international projects, buyers may also arrange third-party inspection companies such as SGS, Bureau Veritas, or TÜV.

Technical Specifications of China Dry Type Transformers

China dry type transformer manufacturers produce a wide range of transformer models according to IEC 60076-11 and international electrical requirements. The following specifications represent common parameters for industrial, commercial, and utility applications.

Parameter	Typical Range	Applicable Standards
Rated Capacity	50 kVA – 5000 kVA and above	IEC 60076
Primary Voltage	3.3kV – 35kV	IEC 60076-1
Secondary Voltage	230V – 11kV	IEC 60076-1
Frequency	50Hz / 60Hz	IEC 60076-1
Insulation Class	Class F (155℃), Class H (180℃)	IEC 60085
Temperature Rise	80K – 100K	IEC 60076-2
Efficiency	98% – 99.5%	IEC 60076
Noise Level	<55dB (standard design)	IEC 60076-10
Protection Degree	IP00 / IP20 / IP23 / IP54	IEC 60529
Cooling Method	AN (Air Natural), AF (Air Forced)	IEC 60076
Fire Resistance	F1 / F2 Classification	IEC 60076-11

Special Features Available for China Dry Type Transformers

Modern dry type transformer factories in China provide customized solutions beyond standard distribution transformers. These features are designed to meet the requirements of advanced applications such as renewable energy, smart grids, and critical infrastructure.

Low Noise Dry Type Transformers

For hospitals, residential buildings, data centers, and urban substations, low noise transformers are increasingly required.

Manufacturers can reduce transformer noise through:

Optimized magnetic core design.

Advanced vibration control technology.

Improved clamping structures.

Low-loss silicon steel materials.

Smart Monitoring System

Smart dry type transformers can integrate digital monitoring systems for real-time operation analysis.

Available functions include:

Winding temperature monitoring.

Remote alarm systems.

IoT communication.

SCADA system integration.

Predictive maintenance functions.

High Protection Enclosure Design

Depending on installation conditions, Chinese manufacturers can provide different enclosure protection levels.

IP20 and IP23 enclosures are commonly used for indoor industrial environments.

IP54 and IP65 designs are suitable for dusty, humid, or outdoor applications.

Environmentally Friendly Transformer Solutions

With increasing global environmental requirements, many manufacturers provide eco-friendly dry type transformer solutions.

These include:

Low-loss energy-saving designs.

RoHS compliant materials.

Low smoke and fire-resistant insulation systems.

Environmentally friendly epoxy resin materials.

Major Export Markets for China Dry Type Transformers

China dry type transformers are exported worldwide and used in thousands of industrial and infrastructure projects. The export market continues to grow because of competitive pricing, reliable quality, and strong manufacturing capacity.

Southeast Asia Market

Countries including Vietnam, Indonesia, Thailand, Malaysia, and the Philippines have strong demand for dry type transformers due to industrial development and infrastructure expansion.

Typical applications include:

Industrial factories.

Commercial buildings.

Renewable energy projects.

Urban power distribution systems.

Middle East Market

The Middle East requires reliable transformers for oil and gas facilities, smart cities, airports, and large construction projects.

Common requirements include:

High temperature resistance.

Dust protection.

High reliability operation.

Africa Market

African countries increasingly import dry type transformers for electrification projects, mining operations, renewable energy systems, and industrial development.

Cost-effective IEC-compliant transformers are especially popular in emerging markets.

Europe and North America Market

European and North American customers usually have stricter requirements regarding certification, energy efficiency, and safety.

Export transformers for these markets commonly require:

IEC standards.

CE certification.

UL certification.

Factory test reports.

China Dry Type Transformer Price Comparison

One of the main reasons international buyers choose Chinese transformer manufacturers is the balance between price and quality.

The following comparison shows the approximate market difference for a 1000 kVA, 11kV/0.4kV dry type transformer.

Supplier Region	Estimated Price Range	Main Advantages
China	$15,000 – $25,000	Competitive price, flexible customization, fast production
Europe	$30,000 – $50,000	Premium brand reputation and local support
North America	$25,000 – $45,000	UL/NEMA compliance and strong service network
Japan	$28,000 – $48,000	Advanced technology and high reliability

For many international projects, sourcing directly from China can reduce transformer procurement costs by approximately 30%–50% compared with European or North American suppliers.

Common Applications of Dry Type Transformers

Dry type transformers manufactured in China are widely used in industries where safety, reliability, and low maintenance are important.

Industrial Applications

Manufacturing plants use dry transformers to supply power for production equipment, motors, automation systems, and control systems.

Heavy industries such as steel plants, cement factories, mining operations, and chemical facilities often select dry type transformers because of their strong environmental adaptability.

Commercial Buildings

Dry transformers are commonly installed in:

Shopping malls.

Office buildings.

Hospitals.

Hotels.

Data centers.

Their fire safety characteristics make them suitable for buildings with strict safety requirements.

Renewable Energy Projects

Solar farms and wind power plants require reliable transformers to connect generated electricity to medium voltage distribution networks.

China dry type transformers are widely used in:

Solar inverter systems.

Wind turbine power collection systems.

Energy storage projects.

How to Select a Reliable China Dry Type Transformer Factory

Choosing the right transformer supplier is essential for project success. Buyers should evaluate manufacturers based on technical capability, quality systems, and export experience.

Check Factory Experience

A professional transformer manufacturer should have:

Years of transformer production experience.

Complete production facilities.

International project references.

Experienced engineering teams.

Verify Certifications

Before ordering, request:

IEC test reports.

UL or CE certificates if required.

ISO certificates.

Factory qualification documents.

Review Testing Capability

Reliable factories should have internal laboratories capable of performing:

High voltage testing.

Temperature rise testing.

Partial discharge testing.

Loss measurement.

Noise testing.

Request Factory Inspection

For large projects, buyers can arrange third-party inspections or factory audits before shipment.

Inspection companies such as SGS, Bureau Veritas, and TÜV can verify production quality and documentation.

Frequently Asked Questions About China Dry Type Transformers

Are China dry type transformers reliable?

Yes. Leading Chinese manufacturers produce dry type transformers according to IEC 60076-11 and international quality standards. Many Chinese transformers are operating successfully in industrial plants, renewable energy projects, and utility systems worldwide.

What certifications should I request from a Chinese transformer supplier?

For international projects, buyers commonly request IEC 60076 compliance, CE certification for Europe, UL certification for North America, and ISO quality management certificates.

How long is the production time for dry type transformers in China?

Standard dry transformers usually require approximately 4–8 weeks. Customized medium voltage transformers may require 8–12 weeks depending on design complexity and testing requirements.

Can Chinese manufacturers provide customized dry transformers?

Yes. Chinese factories commonly provide customized solutions including voltage level, capacity, enclosure design, cooling method, noise reduction, monitoring systems, and special environmental protection requirements.

What is the warranty period for China dry type transformers?

Most manufacturers provide a warranty period of 12–24 months after commissioning or shipment, depending on contract terms.

Why Source Dry Type Transformers from China in 2026?

China has become one of the world’s most important manufacturing centers for dry type transformers. With advanced production technology, complete supply chains, competitive pricing, and strong export experience, Chinese transformer factories provide reliable solutions for global power distribution projects.

For international buyers, the key to successful sourcing is selecting a manufacturer with proven engineering capability, international certifications, strict testing procedures, and reliable after-sales support.

Whether for industrial facilities, commercial buildings, renewable energy projects, or utility applications, China dry type transformer manufacturers can provide cost-effective and high-performance transformer solutions that meet global standards.

Recommended Buyer Action Steps

Define your transformer requirements including capacity, voltage, frequency, certification requirements, and installation environment.

Compare qualified China dry type transformer manufacturers based on factory capability, testing equipment, certifications, and export experience.

Request technical specifications, quotations, test reports, and factory information before placing an order.

Conduct quality inspection before shipment to ensure the transformer meets project requirements.