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.
31500kVA 35kV Oil-Immersed Copper Transformer For Substation
The 31500kVA 35kV Oil-Immersed Copper Transformer is engineered for high-capacity, stable, and efficient power distribution across industrial plants, substations, and utility networks. Built with a high-purity copper winding structure, the transformer ensures superior conductivity, reduced losses, and long-term reliability under continuous heavy-load operation. Its oil-immersed insulation system provides excellent thermal performance, enabling stable operation even in demanding outdoor environments. The robust 35kV design enhances voltage regulation, short-circuit resistance, and overall safety. Advanced manufacturing standards, precision coil winding, and strict quality control ensure exceptional dielectric strength and mechanical durability.
40MVA 110kV Three Phase Oil Immersed Transformer for Substation
The 40MVA 110kV Three Phase Oil Immersed Transformer is engineered for reliable high-voltage transmission and distribution in substations and power plants. Featuring high-purity copper windings, advanced ONAN/ONAF cooling, and on-load tap changer (OLTC ±8×1.25%), it delivers superior efficiency and minimal no-load/loss performance (SZ11/SZ13 series). Fully compliant with IEC 60076, GB 6451, and IEEE standards, it withstands 200kV lightning impulse and offers partial discharge below 10pC. The corrugated tank design ensures optimal heat dissipation and mechanical strength in harsh environments. Ideal for 110/33kV, 110/11kV, or 110/6.3kV step-down applications. Vacuum oil filling and nitrogen sealing guarantee long-term insulation integrity. Trusted by utilities worldwide for stable, maintenance-free operation over 30+ years. Contact us for technical datasheet and competitive pricing.
42MVA 220kV Three Phase Oil Filled Transformer for Substation
The 42MVA 220kV Three Phase Oil Filled Transformer is specifically engineered for high-voltage transmission substations and utility grid applications. Featuring 99.9% electrolytic copper windings, advanced ONAN/ONAF cooling, and ±8×1.25% on-load tap changer, it ensures ultra-low no-load and load losses (SZ13 series available). Fully compliant with IEC 60076, GB/T 6451, and ANSI/IEEE standards, it successfully passes 460 kV lightning impulse, PD level below 10 pC, and induced test at 1.5Um/√3. Robust corrugated tank and conservator design provide excellent thermal and mechanical performance in extreme climates. Ideal for 220/33kV, 220/11kV, or 220/6.6kV step-down configurations. Vacuum oil processing and nitrogen blanketing guarantee long-term reliability and 35+ year service life. Trusted by national grids worldwide. Contact us for datasheet, pricing, and customization options.
250MVA 330kV High-Voltage Oil-Immersed Distribution Transformer for Grid & Substation
The 250MVA 330kV High-Voltage Oil-Immersed Distribution Transformer is engineered for reliable and efficient power transmission in large utility grids and high-demand substations. Designed with advanced insulation and a durable oil-immersed cooling system, it ensures excellent thermal stability and long service life. The high-voltage 330kV configuration provides exceptional performance in long-distance power delivery, minimizing losses and improving grid stability. Its precision-wound copper coils, high-strength core materials, and robust tank structure guarantee safe operation under fluctuating load conditions. With strong short-circuit resistance, high dielectric strength, and low noise operation, this transformer meets stringent international standards. It is widely used in national grid projects, power plants, and heavy-industry energy networks, supporting continuous, stable, and efficient power distribution.
370MVA 750kV Oil-Immersed High-Voltage Transformer for Power Transmission
The 370 MVA 750 kV Oil-Immersed High-Voltage Transformer is designed for ultra-high-voltage (UHV) power transmission systems requiring exceptional reliability, stability, and long-distance energy delivery. With a robust oil-immersed insulation structure and high-grade copper windings, this transformer offers outstanding dielectric strength, low partial discharge, and excellent thermal performance. Engineered for 750kV grid networks, it effectively reduces transmission losses, enhances voltage regulation, and ensures safe operation under demanding load variations. Its precision-built core, advanced cooling system, and reinforced tank construction enable superior efficiency, extended service life, and high short-circuit resistance. Ideal for national power grid projects, long-distance transmission corridors, high-capacity substations, and UHV interconnection systems, this transformer delivers consistent and secure performance in critical large-scale power infrastructures.
6kV Three-Phase Oil-Immersed Power Transformer
The 6kV Three-Phase Oil-Immersed Power Transformer is designed for stable and efficient voltage conversion in industrial and commercial power distribution systems. With a durable oil-immersed insulation structure and high-quality copper windings, it offers excellent thermal performance, strong dielectric strength, and reliable operation under varying load conditions. Its compact design, robust core materials, and advanced cooling system ensure low losses, reduced noise, and long service life. This 6kV transformer is suitable for factories, mining sites, distribution stations, and utility networks requiring consistent and safe electrical power supply. Engineered to meet international standards, it provides dependable performance and high efficiency across diverse low-to-medium voltage applications.
20kV Three-Phase Oil-Immersed Power Transformer 50-2500kVA Copper
The 20kV Three-Phase Oil-Immersed Power Transformer 50-2500kVA Copper adopts high-purity electrolytic copper windings, Class A insulation, and advanced ONAN cooling design. Available in energy-saving S11/S13/S20 series with no-load loss reduced by up to 40%. Fully sealed corrugated tank or conservator type effectively prevents oil aging and moisture ingress. It complies with IEC 60076, GB/T 1094, and can be equipped with ±5% or ±2×2.5% off-circuit tap changer. Low noise (<55 dB), strong short-circuit withstand capability, and overload capacity make it ideal for industrial parks, commercial buildings, and renewable energy projects. Vacuum oil filling and nitrogen sealing ensure insulation performance for over 30 years. Factory supports full third-party inspection (SGS/BV) and provides type test reports.
11kV Three-Phase Oil-Immersed Power Transformer
The 11kV Three-Phase Oil-Immersed Power Transformer is engineered for stable and efficient distribution across medium-voltage networks. Designed with high-grade silicon steel, advanced insulation systems, and premium mineral oil, this transformer ensures superior dielectric strength, excellent heat dissipation, and long service life. Its oil-immersed configuration delivers reliable cooling performance, enabling continuous operation under varying load conditions. The three-phase design ensures balanced power delivery, reduced energy losses, and improved grid stability. With enhanced short-circuit strength, low noise levels, and robust mechanical structure, it is suitable for industrial facilities, commercial complexes, substations, and utility distribution networks. Custom voltage ratios, tap changers, protection devices, and enclosure options are available to meet regional standards and project-specific requirements.
33kV Three-Phase Oil-Immersed Step-Up Power Transformer
The 33kV Three-Phase Oil-Immersed Step-Up Power Transformer is engineered for reliable voltage elevation in medium- and high-voltage distribution networks. Designed with high-grade silicon-steel cores, copper windings, and an efficient oil-immersed cooling system, this transformer delivers stable power transmission with low losses and strong short-circuit endurance. Its robust insulation, sealed tank structure, and advanced protection devices ensure long-term performance in demanding industrial and substation environments. Widely used in renewable energy plants, utility networks, industrial facilities, and rural power upgrades, the 33kV step-up transformer provides secure, efficient, and continuous operation. It supports both on-load and off-load tap changers, offering precise voltage regulation and adaptability to varying grid conditions, making it a dependable choice for modern power distribution systems.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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