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.
250kVA Three Phase Pad Mounted Transformer
The 250kVA Three Phase Pad Mounted Transformer is a compact, liquid-immersed, self-cooled (ONAN) distribution transformer optimized for efficient, underground power delivery in residential, light commercial, and small industrial applications. Fully compliant with IEEE C57.12.34, ANSI C57.12.00, DOE 2016 efficiency standards, and UL-listed, this compartmental-type unit features dead-front 200A high-voltage bushing wells (loadbreak inserts), radial or loop feed options, and a sealed tank using non-PCB mineral oil or FR3 natural ester fluid for improved fire safety and environmental performance.
2MVA Solar Step-Up Pad Mounted Transformer for Solar PV
The 2MVA Solar Step-Up Pad Mounted Transformer is a purpose-built, three-phase, oil-immersed (ONAN) inverter step-up (ISU) transformer designed specifically for utility-scale solar PV farms, boosting low-voltage inverter AC outputs (typically 600V, 690V, 800V, or 480V) to medium-voltage collection levels (e.g., 12.47kV, 13.8kV, 22kV, 24.94kV, 33kV, or 34.5kV) for efficient grid tie-in. Engineered to IEEE C57.159 (DPV guide), IEEE C57.12.34 (pad-mounted compartmental-type), IEEE C57.12.00, DOE 2016 efficiency, and ANSI standards, this UL-listed unit features electrostatic shielding between windings to mitigate inverter harmonics and DC bias, K-factor up to K-19 for nonlinear loads, and reduced flux density to prevent core saturation from potential DC components.
10kV Oil Immersed Transformer
The 10kV Oil Immersed Transformer is a high-performance, three-phase distribution transformer engineered for reliable medium-voltage power conversion in AC 50/60Hz systems. Featuring a fully sealed corrugated tank design, it eliminates the need for an oil conservator while providing excellent moisture resistance and extended service life. This transformer excels in energy savings, with up to 30% lower no-load losses compared to older models, making it ideal for modern grid upgrades and sustainable power distribution.
11kV Oil Immersed Transformer
The 11kV Oil Immersed Transformer is a robust, three-phase medium-voltage distribution unit optimized for efficient step-down power delivery in 50/60Hz AC networks. Engineered with a hermetically sealed tank featuring corrugated fins for thermal expansion compensation, it eliminates conservator requirements while offering superior moisture protection and extended operational durability. High-grade cold-rolled grain-oriented silicon steel laminations reduce core losses significantly, paired with low-resistance copper or aluminum windings for minimized load losses and enhanced conductivity.
20kV Oil Immersed Transformer
The 20kV Oil Immersed Transformer is a high-capacity, three-phase power distribution transformer designed for robust step-down performance in 50/60Hz AC grids up to 20kV primary voltage. It utilizes a fully sealed corrugated tank with advanced thermal fins for oil expansion, eliminating conservators and delivering unmatched resistance to humidity, contamination, and oxidation for over 30-year service life. High-efficiency cold-rolled silicon steel cores with step-lap construction slash no-load losses by up to 40%, complemented by electrolytic copper windings (H62 conductivity).
33kV Oil Immersed Transformer
33kV Oil Immersed Transformer is a high-voltage, three-phase power distribution and step-down unit engineered for reliable operation in 50/60Hz AC transmission and distribution networks with primary voltages up to 33kV (or 30-38.5kV range). It features a hermetically sealed or conservator-type tank with corrugated radiators or detachable coolers for superior thermal management and oil expansion compensation, providing excellent moisture barrier, oxidation resistance, and service life exceeding 35 years. Utilizing premium cold-rolled grain-oriented silicon steel cores with optimized step-lap joints and low-loss designs (S11/S13 series equivalents), it achieves substantial reductions in no-load losses (often 20-40% below older models), paired with high-conductivity copper windings.
35kV Oil Immersed Transformer
NPC ELECTRIC's 35kV Oil Immersed Transformer is a premium three-phase power transformer optimized for high-voltage step-down in 50/60Hz AC systems with primary ratings of 35kV (or 33-38.5kV range). It incorporates a robust conservator or fully sealed tank design with efficient radiator cooling (ONAN standard, ONAF optional), ensuring exceptional thermal dissipation, moisture exclusion. Outdoor-rated with pollution-resistant bushings (BIL 170-200kV), Dyn11/Ynd1 vector groups, and low noise (<62dB), it provides stable 35kV to secondary voltages (e.g., 10kV/6.3kV/0.4kV) conversion, enhancing grid stability, minimizing transmission losses, and supporting demanding applications in harsh or high-altitude conditions.
44kV Oil Immersed Transformer
NPC ELECTRIC's 44kV Oil Immersed Transformer is a heavy-duty three-phase power unit tailored for efficient high-voltage to medium-voltage step-down in 50/60Hz AC grids, handling primary inputs up to 44kV (or 40-46kV variants). Built with a durable conservator-equipped tank and high-efficiency radiator system for optimal oil circulation and heat dissipation. Suitable for pole or pad-mounted installations with YNd11/Dyn1 vector groups and high BIL (200-250kV), it delivers precise 44kV to secondary levels (e.g., 11kV/13.8kV/0.69kV), optimizing power quality, reducing harmonic distortions, and facilitating seamless integration in expansive utility infrastructures.
450kVA Oil Immersed Transformer
The 450kVA Oil Immersed Transformer is a reliable three-phase distribution transformer engineered for medium-voltage step-down applications in 50/60Hz AC systems, typically with primary voltages of 11kV or 33kV (options for 6kV/10kV/20kV) and secondary at 0.4kV/0.415kV/0.433kV. High-grade cold-rolled grain-oriented silicon steel core with low-loss lamination reduces no-load losses, while copper or aluminum windings paired with premium mineral oil minimize load losses and enable ONAN cooling for strong overload capacity. Compliant with IEC 60076, GB/T6451, and energy efficiency standards (e.g., S11/S13 series), it achieves high overall efficiency (>98-99%) at typical loads, low noise (<55dB), and reduced total ownership costs for residential, commercial, and light industrial power distribution.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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