A dry-type transformer is an essential component in modern power distribution systems, offering a safer and more environmentally friendly alternative to traditional oil-filled units. Unlike conventional transformers that rely on insulating oil for cooling and dielectric strength, dry-type transformers use advanced materials such as epoxy resin or cast resin for insulation and heat dissipation. This design eliminates the risk of oil leaks and significantly reduces the potential for fire hazards, making dry-type transformers an ideal choice for indoor installations and sensitive environments. Delong Electric Co., Ltd., a leading Chinese transformer manufacturer established in 2001, has developed an extensive portfolio of high-quality dry-type transformers that meet the evolving demands of global customers. The company focuses on innovation and reliability, ensuring that each unit delivers exceptional performance under various operating conditions. With a strong commitment to research and development, Delong Electric has become a trusted name in the transformer industry, supplying reliable power solutions to clients across the world. Their continuous investment in cutting-edge manufacturing technology further strengthens their position as a competitive player in the global market.

Delong Electric’s dry-type transformers are engineered to serve a wide range of applications, from commercial buildings and industrial facilities to renewable energy projects and infrastructure developments. The company understands that each project comes with unique requirements, which is why they offer comprehensive customization options to match specific voltage, capacity, and environmental needs. By leveraging years of technical expertise and state-of-the-art manufacturing facilities, Delong Electric produces transformers that consistently exceed customer expectations. Their product range includes various types of transformer designs, ensuring that clients can find the perfect solution for their power distribution challenges. The company’s dedication to quality is reflected in their rigorous testing procedures and adherence to international standards. As a result, Delong Electric has successfully exported transformers to numerous countries, earning a reputation for reliability and professional service. For more information about their company background and capabilities, visitors can explore theAbout Us page.

Safety is the foremost consideration in any electrical installation, and Delong Electric’s dry-type transformers are designed with this principle at their core. The use of high-grade epoxy resin insulation provides excellent dielectric strength and thermal stability, ensuring that the transformer can withstand demanding operational stresses without compromising safety. Unlike oil-immersed units, dry-type transformers pose no risk of oil leakage or explosion, making them particularly suitable for locations such as hospitals, shopping centers, schools, and high-rise buildings where fire safety is paramount. The fire-resistant design of Delong’s dry-type transformers meets stringent international fire safety standards, giving facility managers and engineers peace of mind. Additionally, the self-extinguishing properties of the cast resin material prevent the spread of flames, further enhancing the safety profile of these units. This focus on safety does not come at the expense of performance, as Delong’s transformers deliver reliable power distribution while maintaining the highest levels of operational security. For a comprehensive view of the full product lineup, theProduct page provides detailed specifications and options.

Beyond fire resistance, Delong Electric incorporates multiple protective features into their dry-type transformers to ensure long-term operational safety and stability. Each unit undergoes thorough testing for partial discharge, insulation resistance, and thermal performance before leaving the factory, guaranteeing that it meets the required safety benchmarks. The transformers are also designed to operate efficiently in harsh environmental conditions, including high humidity, dusty settings, and corrosive atmospheres, without degrading their safety characteristics. This robust construction minimizes the likelihood of electrical faults and extends the service life of the equipment, reducing the total cost of ownership for end users. Delong's engineering team continuously refines the design and manufacturing processes to incorporate the latest advancements in insulation technology and thermal management. As a result, their dry-type transformers offer a level of safety and dependability that rivals any other type of transformer on the market today. The integration of advanced monitoring systems further enhances operational safety by providing real-time data on transformer health.

Energy efficiency is a critical factor in modern power systems, and Delong Electric’s dry-type transformers are engineered to minimize energy losses while maximizing operational performance. These transformers feature low no-load and load losses, which translate into significant energy savings over their long service life, reducing both electricity costs and carbon footprint. The use of high-quality electrical steel cores and precision-wound copper or aluminum windings contributes to the superior efficiency of Delong’s units, ensuring that power is transmitted with minimal waste. Furthermore, the dry-type design eliminates the need for oil, which not only removes the risk of environmental contamination but also simplifies disposal and recycling at the end of the transformer’s life. This environmentally friendly approach aligns with global sustainability goals and regulations, making Delong’s transformers a responsible choice for eco-conscious businesses. By choosing a dry type transformer from Delong Electric, companies can demonstrate their commitment to green energy practices while benefiting from reliable power distribution. TheHome page offers an overview of Delong’s broader commitment to sustainable transformer solutions.

The environmental advantages of dry-type transformers extend beyond the absence of oil to include lower electromagnetic emissions and quieter operation compared to some other types of transformer designs. Delong Electric optimizes the magnetic circuit and winding configuration to reduce stray losses and electromagnetic interference, ensuring compatibility with sensitive electronic equipment in commercial and industrial settings. The reduced noise levels make these transformers particularly suitable for installations in noise-sensitive areas such as residential complexes, office buildings, and medical facilities. Delong also focuses on using recyclable and RoHS-compliant materials in their transformer construction, further minimizing the environmental impact throughout the product lifecycle. This comprehensive approach to sustainability reflects the company's dedication to corporate social responsibility and environmental stewardship. By integrating energy-efficient technologies and eco-friendly materials, Delong Electric provides transformers that support a greener and more sustainable future for power distribution. Their ongoing research into advanced core materials promises even greater efficiency gains in upcoming product generations.

Delong Electric’s dry-type transformers are manufactured in strict compliance with international standards, most notably IEC 60076-11, which specifies the requirements for dry-type power transformers. This standard covers critical aspects such as insulation levels, temperature rise limits, short-circuit withstand capability, and partial discharge measurement, ensuring that Delong’s products meet globally recognized quality and safety benchmarks. The company employs advanced vacuum pressure impregnation (VPI) technology, which enhances the insulation system by eliminating air voids and improving thermal conductivity, resulting in a more reliable and durable transformer. In addition to IEC 60076-11, Delong’s transformers also comply with relevant ANSI, IEEE, and other regional standards, allowing them to be used in diverse geographical markets without modification. This international compliance is a testament to Delong’s engineering capabilities and their commitment to delivering products that perform consistently across different regulatory environments. The VPI transformer manufacturing process is carefully controlled to ensure uniform insulation coverage, superior dielectric strength, and extended operational life. Each production batch undergoes rigorous quality assurance checks to maintain the highest levels of consistency and performance.

For applications requiring enhanced insulation and mechanical strength, Delong Electric offers cast resin type transformer solutions that provide exceptional performance in demanding environments. The cast resin technology involves vacuum casting of the windings in epoxy resin, creating a solid, void-free insulation system that is resistant to moisture, dust, and chemical contaminants. This construction method delivers outstanding thermal cycling capability, allowing the transformer to handle frequent load variations without degradation. Cast resin transformers also exhibit excellent short-circuit strength and low partial discharge levels, making them highly reliable for critical power applications. Delong Electric's cast resin type transformer designs are available in a wide range of power ratings and voltage classes, catering to diverse customer requirements. Each unit is subjected to comprehensive type tests and routine tests to verify its performance against the specified standards, ensuring that it delivers the promised reliability and efficiency. The robust encapsulation also provides superior protection against harsh environmental conditions, extending the transformer's service life even in challenging installations.

Recognizing that no two power distribution challenges are exactly alike, Delong Electric offers extensive customization options for their dry-type transformers to meet specific project requirements. Customers can choose from various voltage ratings, power capacities, winding materials (copper or aluminum), enclosure types, and cooling configurations to create a transformer that perfectly fits their operational needs. Delong’s engineering team works closely with clients during the design phase to understand the application environment, load characteristics, and any special regulatory or performance requirements. This collaborative approach ensures that the final product delivers optimal performance and reliability, whether it is installed in a crowded urban substation or a remote industrial facility. The company also provides custom accessories such as temperature monitoring systems, surge arresters, and specialized terminals to enhance the functionality and protection of the transformer. For clients interested in tailored solutions, theCustomized page offers detailed information about the customization process and after-sales support. The flexibility in design and manufacturing allows Delong to serve both standard and highly specialized applications with equal competence.

Delong Electric’s dry-type transformers are deployed across a wide spectrum of industries, demonstrating their versatility and robust performance in various operating conditions. In the commercial sector, these transformers power office buildings, shopping malls, hotels, and data centers, where safety, quiet operation, and compact design are essential. Industrial applications include factories, refineries, mining operations, and chemical plants, where the transformers must withstand harsh environments and heavy electrical loads. The renewable energy sector is another key application area, with Delong’s transformers used in wind farms, solar power plants, and energy storage systems to step up or step down voltage for efficient power transmission. Additionally, infrastructure projects such as airports, railways, hospitals, and water treatment facilities rely on Delong’s dry-type transformers for dependable and safe power distribution. This broad application base reflects the adaptability and reliability of Delong Electric’s transformer technology across different types of transformer requirements. The company’s ability to serve such diverse markets underscores its position as a versatile and trusted partner in the power equipment industry. For the latest developments and case studies, theNews page features updates on Delong’s global projects and achievements.

Delong Electric Co., Ltd. has built a strong reputation in the global transformer market through a combination of technical expertise, manufacturing excellence, and customer-centric service. With over two decades of experience since its founding in 2001, the company has accumulated deep knowledge in designing and producing a comprehensive range of transformers, including oil-immersed, dry-type, amorphous alloy, and photovoltaic transformers. This extensive experience allows Delong to understand the nuances of different power applications and deliver solutions that address real-world challenges effectively. The company’s factory is equipped with advanced production lines and testing facilities, ensuring that every transformer meets strict quality control standards before delivery. Delong’s professional team provides end-to-end support, from initial consultation and design to installation, commissioning, and after-sales maintenance. This holistic approach to customer service has earned Delong Electric a loyal client base across Asia, Europe, Africa, the Middle East, and the Americas. The company’s dedication to continuous improvement and customer satisfaction sets it apart from many competitors in the industry.

Choosing Delong Electric for your dry-type transformer needs means partnering with a manufacturer that prioritizes quality, innovation, and customer satisfaction. The company’s competitive pricing, combined with high product reliability, offers excellent value for businesses seeking cost-effective power distribution solutions. Delong’s commitment to continuous improvement is evident in their ongoing investment in new technologies, employee training, and process optimization. The company also maintains a strong focus on after-sales support, providing technical assistance, spare parts availability, and warranty services to ensure long-term operational success. With a global network of partners and representatives, Delong Electric can respond quickly to customer inquiries and provide localized support across different regions. By choosing Delong, businesses gain a reliable partner that helps them achieve their power distribution goals with confidence and efficiency. Their proven track record of successful global projects further reinforces their position as a trusted transformer manufacturer.

A dry-type transformer is an electrical device that transfers energy between circuits through electromagnetic induction without using liquid insulation. Instead of oil, it uses solid insulation materials such as epoxy resin or cast resin to protect the windings and dissipate heat. This design makes dry-type transformers safer, more environmentally friendly, and suitable for indoor installations where fire safety is a priority. Delong Electric manufactures high-quality dry-type transformers that deliver reliable performance across a wide range of applications.

The main advantages of a dry type transformer include superior fire safety, since there is no oil to leak or ignite, lower environmental risk, reduced maintenance requirements, and quieter operation. Dry-type transformers are also more compact and can be installed indoors without the need for special oil containment systems. Delong Electric’s dry-type transformers combine these benefits with high energy efficiency and compliance with international standards, making them an excellent choice for commercial, industrial, and infrastructure projects.

Delong Electric's dry-type transformers are manufactured in compliance with IEC 60076-11, the international standard for dry-type power transformers. They also meet relevant ANSI, IEEE, and other regional standards, allowing them to be used in diverse markets worldwide. This compliance ensures that every transformer meets strict requirements for insulation, temperature rise, short-circuit strength, and partial discharge, guaranteeing reliable and safe operation. Delong's commitment to international standards reflects their dedication to quality and customer satisfaction.

A cast resin type transformer uses epoxy resin that is vacuum-cast around the windings to create a solid, void-free insulation system. This design provides excellent mechanical strength, moisture resistance, chemical resistance, and thermal cycling capability. Benefits include enhanced reliability in harsh environments, low partial discharge levels, compact size, and minimal maintenance needs. Delong Electric offers a range of cast resin type transformers designed for critical applications in industrial, commercial, and renewable energy sectors.

IEC 60076-11 is the international standard that specifies requirements for dry-type power transformers, covering insulation levels, temperature rise limits, short-circuit withstand capability, partial discharge measurement, and testing procedures. Compliance with this standard ensures that the transformer is designed and manufactured to deliver safe, reliable, and efficient performance. Delong Electric’s transformers are fully tested to meet IEC 60076-11 requirements, providing customers with confidence in product quality and durability.

Yes, Delong Electric offers extensive customization options for their dry-type transformers, including custom voltage ratings, power capacities, winding materials, enclosure types, and cooling configurations. Their engineering team works closely with clients during the design phase to tailor the transformer to specific application requirements, environmental conditions, and regulatory standards. For more details on the customization process, visit the Customized page on the Delong Electric website.

Dry-type transformers are widely used in commercial buildings such as offices, shopping malls, hotels, and data centers, as well as in industrial facilities including factories, refineries, and chemical plants. They are also essential in renewable energy projects like wind farms and solar power plants, plus infrastructure applications such as airports, railways, hospitals, and water treatment facilities. Delong Electric supplies dry-type transformers to all these sectors, demonstrating their versatility and reliability across different types of transformer applications.

A VPI transformer (Vacuum Pressure Impregnated transformer) uses a process where the windings are impregnated with resin under vacuum and pressure to fill all voids and improve insulation properties. In contrast, a cast resin transformer has the windings fully encapsulated in epoxy resin through a casting process, creating a solid block. Both technologies offer excellent insulation and protection, but cast resin transformers typically provide higher mechanical strength and environmental resistance. Delong Electric manufactures both types, allowing customers to choose the best solution for their specific needs.

Delong Electric’s dry-type transformers are designed with high-quality electrical steel cores and precision-wound windings to achieve low no-load and load losses, resulting in superior energy efficiency. These transformers help reduce electricity costs and carbon emissions over their long service life, making them a sustainable choice for power distribution. Delong continuously invests in research to improve efficiency further, ensuring their products remain competitive in the evolving energy landscape.

Delong Electric has over two decades of experience, state-of-the-art manufacturing facilities, stringent quality control processes, and a strong commitment to international standards such as IEC 60076-11. The company offers comprehensive customization, end-to-end customer support, and a global service network, ensuring that clients receive high-quality, reliable transformers tailored to their needs. Their proven track record of successful projects worldwide reinforces their reputation as a trusted partner in the transformer industry.