Transformers
Transformers
Discover our comprehensive range of high-performance Transformers, engineered for reliable power distribution across diverse applications. We offer a full spectrum, including robust Pad Mounted Transformers for secure underground systems, efficient Distribution Transformers for utility grids, and space-saving Pole Mounted Transformers for overhead lines. For sensitive indoor environments, our Dry Type Transformers deliver exceptional safety without liquid coolants. Completing our lineup are powerful Power Transformers, vital for bulk energy transmission. Featuring advanced insulation (oil-filled or cast resin), optimized core designs, and adherence to international standards, our transformers ensure minimal energy loss, optimal voltage regulation, and long-term operational stability for industrial, commercial, and utility sectors.
600kVA Oil Immersed Transformer
The 600kVA Oil Immersed Transformer is a robust three-phase distribution transformer designed for reliable medium-voltage power step-down in 50/60Hz AC networks, commonly with primary voltages of 11kV or 33kV. Utilizing premium grain-oriented silicon steel core (S11/S13 series) to achieve reduced no-load losses, copper or aluminum windings, and high-quality mineral oil , it minimizes load losses while providing ONAN cooling for substantial overload tolerance (up to 140% short-term). Compact design with Dyn11 vector group, BIL ratings, and pole/ground-mount flexibility ensures dependable performance, minimal energy dissipation, and seamless integration in modern distribution systems.
700kVA Oil Immersed Transformer
The 700kVA Oil Immersed Transformer is a high-performance three-phase distribution transformer optimized for dependable medium-voltage power conversion in 50/60Hz AC grids, featuring primary ratings of 11kV or 33kV and secondary at 0.4kV/0.415kV/0.433kV. It adopts a fully hermetically sealed corrugated tank construction for automatic volume compensation, delivering outstanding resistance to humidity ingress, corrosion. Incorporating low-loss grain-oriented silicon steel core (S11/S13 series compliant) for minimized no-load losses (typically 950-1300W), high-conductivity copper windings, and premium-grade mineral insulating oil (IEC 60296 certified, dielectric >55kV/2.5mm).
3000kVA Oil Immersed Transformer
The 3000kVA Oil Immersed Transformer is a high-capacity three-phase power distribution transformer engineered for heavy-duty medium- to high-voltage step-down. Premium high-permeability cold-rolled grain-oriented silicon steel core (S13/S18 series level) significantly reduces no-load losses (typically 3500–4800W), while high-conductivity copper windings and superior mineral or ester insulating oil (IEC 60296/IEC 61099 compliant, dielectric >60kV/2.5mm) achieve low load losses (around 22–28kW at 75°C), ONAN/ONAF cooling capability for sustained overloads (up to 150–180% short-term), noise levels <65dB, and peak efficiency >99%. Conforming to energy efficiency regulations, this transformer delivers substantial energy savings, reduced transmission losses, and dependable performance in industrial, utility, and renewable applications.
3150kVA Oil Immersed Transformer
3150kVA Oil Immersed Transformer is a high-capacity three-phase power transformer optimized for efficient voltage transformation in 50/60Hz AC medium-voltage networks, with primary ratings commonly at 11kV, 22kV, 33kV, or 35kV (adaptable to 10–38.5kV) and secondary at 0.4kV, 0.69kV, 6.3kV, 10kV, or 11kV. Employing advanced high-permeability grain-oriented silicon steel core (S13/S20 series compliant) for dramatically reduced no-load losses (typically 3200–5400W), high-purity copper windings, and premium insulating oil (IEC 60296 compliant, dielectric >60kV/2.5mm), it achieves low load losses (around 18–22kW at 75°C), strong overload capability (up to 150–180% short-duration), noise below 65dB, and efficiency exceeding 99%.This transformer minimizes operational expenses, transmission losses, and environmental impact in large-scale industrial, utility, and renewable setups.
4000kVA Oil Immersed Transformer
4000kVA Oil Immersed Transformer is designed for medium and large-scale power distribution systems that require high reliability, strong overload capacity, and long-term stable operation. The transformer adopts a fully sealed oil-immersed structure, effectively preventing moisture ingress and oil oxidation, thereby extending service life and reducing maintenance frequency. The transformer features excellent thermal performance and robust insulation strength, ensuring stable operation under continuous load or fluctuating grid conditions. Advanced oil circulation and cooling structure enhance heat dissipation, while precise manufacturing processes guarantee low noise and high mechanical strength.
5000kVA Oil Immersed Substation Transformer
The 5000kVA Oil Immersed Substation Transformer is engineered for high-capacity power substations that demand continuous stability, strong load adaptability, and long operational life. Featuring an advanced oil-immersed insulation system, the transformer effectively enhances dielectric strength and thermal conductivity, ensuring reliable performance under heavy and fluctuating load conditions. With superior short-circuit withstand capability and efficient cooling performance, the transformer provides dependable power conversion for substations serving industrial, commercial, and infrastructure applications.
150kVA Oil Immersed Transformer
NPC ELECTRIC's 150kVA Oil Immersed Transformer is a compact and efficient power distribution solution designed for low to medium load applications. Utilizing a traditional oil-immersed insulation system, the transformer delivers stable dielectric performance and effective heat dissipation, ensuring reliable operation under continuous service conditions. The optimized core and winding structure reduces energy loss while maintaining consistent voltage output, making it suitable for decentralized power networks. With low operating noise and dependable overload capability, the transformer supports stable power supply for residential, commercial, and light industrial users. Its compact footprint and proven oil-filled technology make it an economical and practical choice for localized power distribution systems.
10.5KV Oil Immersed Substation Transformer
The 10.5kV Oil Immersed Substation Transformer is specifically designed for medium-voltage power substations requiring stable voltage conversion and reliable long-term operation. Utilizing a proven oil-immersed insulation system, the transformer provides excellent dielectric strength and efficient heat dissipation, ensuring dependable performance under continuous load conditions. High-quality winding materials and precise manufacturing processes enhance mechanical strength and short-circuit resistance. With low operating noise and strong thermal stability, the transformer is well-suited for modern substations serving industrial, commercial, and infrastructure power distribution systems.
15KV Oil Immersed Substation Transformer
NPC ELECTRIC's 15kV Oil Immersed Substation Transformer is designed for medium-voltage substations that require dependable power transformation, high insulation reliability, and long-term operational stability. By adopting a mature oil-immersed insulation system, the transformer ensures excellent dielectric performance. This 15kV oil immersed substation transformer features a sealed tank structure that effectively protects internal components from moisture, dust, and external contamination. With low noise operation and reliable voltage regulation performance, the transformer is well suited for modern substations serving industrial, commercial, and infrastructure power distribution networks.In-Depth Analysis
NPC Electric transformers are built to deliver high efficiency, reliable performance, and advanced safety, helping businesses reduce energy costs while ensuring stable power supply. With future-ready adaptability for renewable energy and smart grid applications, they provide a sustainable and innovative solution for today’s and tomorrow’s power needs.
Comparative Analysis of Efficiency and Loss
Compared to the industry average, NPC transformers exhibit lower losses and higher efficiency across the entire load range.
Load Efficiency Comparison(%)
No-load Loss Comparison(W)
High-efficiency Core Design
High magnetic permeability and low loss silicon steel sheets are used and processed by special process to reduce hysteresis loss and eddy current loss and improve conversion efficiency.
Improved Magnetic Permeability
+25%
Reduced Iron Loss
-30%
Multiple Protection Systems
IP65 protection grade design combines multiple protection measures such as anti-corrosion, anti-UV, anti-condensation and anti-small animal intrusion.
Waterproof Performance
IP65
Anti-Corrosion Ability
15 years+
Ultra-low Noise Technology
A special shock-absorbing structure, low-noise fans, and optimized heat dissipation design ensure operating noise is far below industry standards.
Noise Reduction
-15dB
Suitability for Residential Areas
Excellent
Intelligent Cooling System
The heat dissipation system with adaptive temperature control automatically adjusts the heat dissipation efficiency according to the load and ambient temperature to reduce energy consumption.
Heat Dissipation Efficiency
+40%
Temperature Stability
±2℃
Safety Wiring System
Insulated protective cover and anti-misoperation design ensure personnel safety during installation and maintenance and reduce accident risks
Insulation Grade
Class H
Safety Protection
IP2X
Intelligent Monitoring
An optional remote monitoring system is available to monitor operating status, temperature, load and other parameters in real time, and supports fault warning and remote diagnosis.
Data Collection Frequency
one times a minute
Fault Warning Accuracy
98%
Environmental Adaptability Analysis
NPC transformers have been rigorously tested and can operate stably under various harsh environmental conditions.
Temperature Range
-40℃ ~ +55℃
Can work normally in extreme high and low temperature environments
Humidity Adaptation
0 ~ 100% RH
Including condensation environment, no frost requirement
Seismic Resistance Level
IEC 60068-2-57
Suitable for earthquake-prone areas
Altitude
≤3000m
More than special design
Why Choose Us
As a trusted partner in energy savings and the development of green energy solutions, NPC Electric has played a pioneering role in the development of national smart grids across multiple regions.
Transformer Manufacturer
With over 30 years of manufacturing experience, we specialize in delivering reliable and efficient transformer solutions.
Our product portfolio includes Pad Mounted Transformers, Power Transformers, Dry Type Transformers, Pole Mounted Transformers, Oil-immersed Transformer, Substation Transformer and Distribution Transformers, serving diverse applications with proven quality and innovation.
NPC ELECTRIC is committed to providing partners with high-quality, high-performance, and high-reliability transformers.
Our product portfolio includes Pad Mounted Transformers, Power Transformers, Dry Type Transformers, Pole Mounted Transformers, Oil-immersed Transformer, Substation Transformer and Distribution Transformers, serving diverse applications with proven quality and innovation.
NPC ELECTRIC is committed to providing partners with high-quality, high-performance, and high-reliability transformers.
Transformer Installation
NPC Electric’s skilled engineers offer full-cycle support—from design consultation and technical drawings to on-site guidance and after-sales service—ensuring peace of mind at every stage of the project.
We have a technical team of over 60 members and more than 100 after-sales engineers, ready to assist customers with installation and on-site support. Till now, we have provided professional engineering services in countries such as Mongolia, Honduras, Peru, and Rwanda. Our services include winding resistance testing, oil testing, and installation support.
We have a technical team of over 60 members and more than 100 after-sales engineers, ready to assist customers with installation and on-site support. Till now, we have provided professional engineering services in countries such as Mongolia, Honduras, Peru, and Rwanda. Our services include winding resistance testing, oil testing, and installation support.
Transformer Testing
NPC Electric uses high-quality raw materials and advanced production processes, supported by strict quality control systems. Our products meet or exceed international standards such as IEC, UL, and ISO, ensuring safety, reliability, and long service life. All our cables are subject to third-party laboratory testing—such as by SGS, DNV, or witnessed directly by customers—to ensure compliance and performance.
Efficient Logistics & Timely Delivery
With over 4,200 square meters of strategically located warehouse space across China, we guarantee timely delivery and flexible logistics to meet tight global project schedules. We utilize specialized transportation teams across land, sea, and air to assist with shipping your products. We can arrange shipping on EXW, CIF, FOB, FCA, CIP, or any other terms requested by the client.
Product Show
Explore the detailed design and practical application scenarios of NPC transformers
Pad Mounted Transformer
Pad Mounted Transformer Design
3 Phase Transformer
Transformer Internal Structure
NPC Earth Transformer
Safe and reliable
Oil Immersed Transformer
Lightweight and compact with superior performance
Testing and Certification
Tested with precision and certified to meet international standards as
well as strict industry requirements.
Bare Cable Test Report
SGS Inspection Report
Certificate of Acceptance
ISO Quality Certificate
ISO Environmental Certificate
ISO Occupational Certificate
UL Laboratory Certificate
UL Product Certificate
Project Cases
NPC transformers have been successfully applied in many projects and have been highly praised by customers.
Mongolia Industrial Park
CompletedProvide stable and reliable power conversion solutions for industrial parks to meet diverse production needs.
Country：Mongolia
Model：Three Phase Pad Mounted Transformer x 8
Dominican Factory
CompletedEnsure power security in nearby industrial parks and meet diverse needs
Country：Dominican
Model：NPC 450KV Power Transformer x 4
Dominican Electricity
CompletedDry-type transformers provide safe, efficient, and reliable power distribution in Dominican .
Country：Dominican
Model：NPC Dry Type Transformer x 6
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
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What types of transformers do you manufacture?
We provide a full range of transformers including pad mounted transformers, power transformers, dry type transformers, pole mounted transformers, and distribution transformers, etc. -
How do your transformers ensure safety and reliability?
NPC transformers are built with advanced insulation systems, strict quality control, and international standard certifications, ensuring long-term safe and stable performance. -
Can transformers be customized for specific applications?
Yes. We offer customized designs to meet unique requirements in renewable energy, industrial, utility, and commercial applications. -
What is the typical service life of your transformers?
With proper maintenance, our transformers are designed for a service life of 25–30 years or more, ensuring reliable operation with minimal downtime. -
Do you provide after-sales service and technical support?
Absolutely. We offer comprehensive after-sales service, including installation guidance, maintenance support, and technical consultation.
Welcome your inquiry
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