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.
130kV High-Voltage Power Transformer
The 130kV Power Transformer is designed for advanced high-voltage transmission and distribution systems requiring superior electrical stability and long-term operational reliability. Built with an optimized magnetic circuit and precision-engineered windings, it delivers excellent voltage regulation, minimized energy losses, and strong resistance to thermal and mechanical stress. The transformer features a reinforced insulation structure and a sealed oil-immersed cooling system that ensures consistent performance under fluctuating load and environmental conditions. Its rugged construction supports outdoor installation and continuous operation in demanding climates. Designed to meet international grid requirements, this transformer is suitable for utility networks, industrial power hubs, and infrastructure projects where safety, efficiency, and service continuity are critical.
130kV 10MVA / 25MVA / 40MVA Electrical Power Transformer
The 130kV Electrical Power Transformer with ratings of 10MVA, 25MVA, and 40MVA is designed to support medium-to-large capacity power transmission and distribution systems. It is engineered to provide consistent voltage conversion, high operational efficiency, and excellent thermal stability under variable grid conditions. The transformer incorporates a precisely calculated magnetic core, high-strength winding design, and an oil-immersed insulation system that enhances heat dissipation and electrical reliability. Its structure is optimized to withstand electrical stress, mechanical vibration, and long-term continuous operation. Suitable for outdoor installation, the transformer maintains stable performance in challenging environments such as high temperature, humidity, or heavy industrial zones. Built in accordance with recognized international standards, it offers dependable service life and reduced maintenance requirements for modern power networks.
132kV High Voltage Outdoor Power Substation Transformer for Grid Systems
The 132kV High Voltage Outdoor Power Substation Transformer is engineered to support modern grid systems that demand high reliability, operational stability, and long-term performance. Designed for continuous outdoor operation, it features a robust oil-immersed insulation system combined with a mechanically reinforced structure to withstand electrical stress, environmental exposure, and grid fluctuations. The transformer is optimized for efficient power transfer with controlled losses and stable voltage regulation across varying load conditions. Its thermal design ensures effective heat dissipation, supporting extended service life even under high ambient temperatures. Suitable for utility substations and large-scale grid infrastructure, this transformer meets stringent operational and safety requirements while maintaining ease of maintenance and dependable long-term operation in complex power networks.
133kV 135kV Three-Phase Power Transformer – High Voltage Substation Equipment
The 133kV / 135kV Three-Phase Power Transformer is developed for high-voltage substations requiring dependable power conversion, grid stability, and long-term operational security. Designed as core infrastructure equipment, it supports continuous duty under fluctuating electrical loads and complex grid conditions. The transformer integrates a high-strength magnetic core, precision-manufactured windings, and a stable oil-immersed insulation system to achieve controlled losses and consistent voltage performance. Its structural design prioritizes mechanical durability, enabling safe operation under electrical stress, thermal expansion, and external environmental factors. Engineered for outdoor substation installation, the transformer ensures reliable service life with reduced maintenance demand. Compliance with international power equipment standards makes it suitable for modern transmission and substation systems where operational reliability, safety, and efficiency are essential.
138kV / 140kV / 150kV Three-Phase Oil-Immersed Power Transformer
The 138kV / 140kV / 150kV Three-Phase Oil-Immersed Power Transformer is designed to serve high-voltage transmission and substation applications requiring dependable energy transfer and long-term operational stability. Its design emphasizes electrical reliability, structural strength, and efficient thermal management to support continuous service under varying grid loads. The transformer employs a refined magnetic circuit and carefully engineered winding structure to maintain voltage accuracy while minimizing operational stress. An oil-immersed insulation and cooling system ensures effective heat dissipation and insulation integrity throughout extended operating cycles. Built for outdoor installation, the transformer is capable of withstanding environmental exposure, electrical fluctuations, and mechanical demands associated with modern high-voltage networks. It is suitable for utility-scale projects where safety, efficiency, and durability are essential performance criteria.
158kV 250MVA Power Transformer – High-Voltage Substation Autotransformer
The 158kV 250MVA High-Voltage Substation Autotransformer is designed for large-capacity power transmission systems where efficiency, voltage stability, and reduced losses are critical. As an autotransformer, it enables optimized power transfer between closely related voltage levels while minimizing material usage and operational losses. The unit features a robust electromagnetic design, reinforced insulation structure, and an oil-immersed cooling system that ensures effective heat dissipation under heavy continuous load. Its mechanical framework is engineered to withstand high electrical stress, short-circuit forces, and long-term outdoor exposure. Intended for backbone substations and grid interconnection points, this autotransformer supports reliable energy exchange in high-voltage networks and contributes to improved system efficiency and reduced lifecycle operating costs.
High Voltage 160kV Step-Up Power Transformer: Efficient 20MVA / 30MVA / 60MVA Solutions for Substations
The 160kV High Voltage Step-Up Power Transformer is designed to increase voltage levels efficiently for power generation plants and substation applications. Available in 20MVA, 30MVA, and 60MVA ratings, it supports stable energy transmission from generation sources to high-voltage networks. The transformer adopts a carefully optimized electromagnetic design that enhances voltage conversion efficiency while maintaining controlled thermal and electrical performance. Its oil-immersed insulation system ensures reliable cooling and long-term insulation stability under continuous operating conditions. The structural design emphasizes mechanical strength and operational safety, enabling dependable performance in outdoor substations and demanding grid environments. This step-up transformer is well suited for modern power systems that require efficient voltage elevation, reduced transmission losses, and consistent operational reliability.
161kV 50MVA Two-Winding Power Transformer – Efficient Oil-Filled Design with OLTC
The 161kV 50MVA Two-Winding Power Transformer is engineered to deliver precise voltage control and stable power transfer in high-voltage transmission and substation networks. Featuring an oil-filled insulation system combined with an On-Load Tap Changer (OLTC), this transformer allows continuous voltage adjustment under load conditions without interrupting system operation. The electromagnetic design emphasizes low losses, high operational efficiency, and consistent performance across variable load profiles. Robust mechanical construction enhances resistance to thermal expansion and short-circuit forces, ensuring long-term reliability in demanding grid environments. Optimized oil circulation supports effective heat dissipation, contributing to extended service life and reduced maintenance requirements. This transformer is well suited for modern power systems where voltage stability, operational flexibility, and dependable energy transmission are critical.
170kV 4–40MVA Oil-Immersed High-Voltage Power Transformer
The 170kV 4–40MVA oil-immersed high-voltage power transformer is designed to support flexible capacity requirements across modern transmission and substation systems. Its wide MVA range allows a single platform to adapt to diverse grid configurations, from regional substations to industrial power interfaces. The transformer utilizes a refined oil-paper insulation system to ensure strong dielectric performance and long-term operational stability under high electrical stress. Advanced magnetic circuit optimization minimizes losses while maintaining excellent voltage regulation. The mechanical structure is engineered to withstand thermal cycling, short-circuit forces, and continuous operation under variable load conditions. With a focus on reliability, efficiency, and service life, this transformer is well suited for utility-scale projects that demand dependable high-voltage energy transfer with adaptable power ratings.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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