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.
75kV 1250kVA Three Phase Oil Immersed Power Transformer Copper
The 75kV 1250kVA Three Phase Oil Immersed Power Transformer Copper is engineered for regional 66–75 kV transmission and industrial step-down applications. It adopts 99.99 % electrolytic copper windings, high-grade grain-oriented silicon steel S13 core, corrugated tank + ONAN cooling, and ±5 % off-circuit tap changer (on-load optional). Fully compliant with IEC 60076, lightning impulse withstand 350 kV peak, PD <10 pC, noise ≤58 dB. Fully sealed or conservator design with vacuum oil filling and nitrogen sealing ensures >30-year maintenance-free operation even in high-altitude or polluted areas. Ideal for mining, metallurgy, wind farms, and urban 75 kV substations requiring high reliability and low loss.
85kV 1850kVA Outdoor Oil Immersed Distribution Transformer Copper
The 85kV 1850kVA Outdoor Oil Immersed Distribution Transformer Copper is specially developed for 66–110 kV regional distribution networks and industrial users. It adopts 99.99 % electrolytic copper windings, high-permeability S13 grain-oriented silicon steel core, corrugated-fin tank + ONAN natural cooling, and ±5 % off-circuit tap changer (on-load optional). Fully compliant with IEC 60076, lightning impulse withstand 395 kV peak, PD <10 pC, noise ≤60 dB. Fully sealed conservator or sealed-type design with vacuum oil filling + nitrogen sealing guarantees >30-year maintenance-free operation even in high-altitude, high-pollution, or coastal areas. Ideal for mining, metallurgy, wind/solar grid connection, petrochemical plants, and urban 85 kV substations requiring maximum reliability and minimum losses.
90kV Three-Phase Oil-Immersed Power Transformer
The 90kV Three-Phase Oil-Immersed Power Transformer for High-Voltage Distribution is engineered to deliver reliable and efficient performance across utility grids, industrial substations, and high-voltage transmission systems. Designed with high-grade silicon steel cores and 100% copper windings, the transformer ensures low losses, strong short-circuit resistance, and stable thermal performance. Its oil-immersed cooling structure provides superior heat dissipation, supporting continuous and heavy-duty operation. The robust tank, high-performance insulation system, and outdoor-ready protection structure enable safe operation in harsh climate conditions. Compliant with IEC, IEEE, and GB standards, the transformer offers excellent voltage stability, long service life, and high operational reliability. It is widely used in power utilities, infrastructure projects, renewable energy integration, and industrial distribution networks requiring dependable high-voltage transformation.
100kV 200kVA 250kVA 315kVA Three-Phase Oil-Immersed Substation Power Transformer
This 100kV three-phase oil-immersed substation power transformer is engineered for stable voltage transformation across 200kVA, 250kVA, and 315kVA capacity ranges. Designed for medium to high-voltage distribution networks, it delivers exceptional reliability, thermal endurance, and operational efficiency in substations, industrial plants, and utility distribution grids. The transformer utilizes high-grade insulation, precision-wound copper conductors, and robust core materials to ensure low losses, long service life, and consistent performance under demanding electrical and environmental conditions. Its sealed oil-immersed structure enhances insulation strength and optimizes heat dissipation for safe and continuous operation.
110kV Customized 12500kVA 20000kVA High-Voltage Electric Power Transformer
The Customized 12500kVA and 20000kVA High-Voltage Electric Power Transformer is engineered to meet the demanding requirements of grid transmission, industrial distribution, and large-scale power infrastructure. Designed with fully customized voltage configurations, high-grade copper windings, advanced insulation systems, and optimized oil-immersed cooling structures, it ensures exceptional efficiency, stable voltage regulation, and long-term operational reliability. This transformer supports heavy-load operation, complex grid environments, and diverse installation conditions, making it suitable for substations, industrial plants, renewable energy integration, and major commercial facilities. With flexible design options, strict quality control, and compliance with international standards such as IEC, IEEE, and ANSI, it delivers robust performance and extended lifecycle.
115kV 35MVA Three-Phase Oil-Immersed Power Transformer
The 115kV 35MVA Three-Phase Oil-Immersed Power Transformer is designed for reliable and efficient operation in high-voltage transmission and substation applications. Built with high-permeability silicon steel cores and precision-wound copper conductors, it delivers low losses, strong short-circuit withstand capability, and excellent thermal stability. The oil-immersed cooling system ensures effective heat dissipation, enabling continuous operation under heavy-load conditions. A robust tank structure, advanced insulation system, and outdoor-rated protection make the transformer suitable for harsh environmental conditions. Manufactured in accordance with IEC, IEEE, and ANSI standards, this transformer is widely used in utility substations, industrial power systems, and regional transmission networks where long service life, stable voltage regulation, and high operational reliability are critical.
120kV High-Voltage Three-Phase Oil-Immersed Power Transformer
The 120kV High-Voltage Three-Phase Oil-Immersed Power Transformer is engineered for reliable and efficient operation in transmission networks and high-voltage substations. Designed with high-permeability silicon steel cores and precision-wound copper conductors, it delivers low losses, excellent thermal performance, and strong short-circuit withstand capability. The oil-immersed cooling system ensures effective heat dissipation, supporting continuous operation under heavy-load and fluctuating grid conditions. A robust tank structure, advanced insulation system, and outdoor-rated protection allow stable operation in harsh climates and demanding environments. Manufactured in accordance with IEC, IEEE, and ANSI standards, this transformer is widely applied in utility grids, industrial power systems, and large-scale infrastructure projects where high reliability, long service life, and stable voltage transformation are essential.
121kV Oil-Immersed High-Voltage Power Transformer
The 121kV Oil-Immersed High-Voltage Power Transformer is designed to provide stable, efficient, and long-term power transformation for transmission networks and high-voltage substations. Utilizing high-quality silicon steel cores and precision-wound copper conductors, the transformer achieves low no-load losses, strong short-circuit withstand capability, and excellent thermal stability. The oil-immersed insulation and cooling system ensures effective heat dissipation, supporting continuous operation under heavy-load and fluctuating grid conditions. Its reinforced tank structure, advanced insulation system, and outdoor-rated protection design enable reliable performance in harsh climates and demanding environments. Manufactured in accordance with IEC, IEEE, and ANSI standards, this transformer is widely applied in utility grids, industrial power systems, and infrastructure projects requiring high reliability, safety, and long service life.
125kV Three-Phase Power Distribution Transformer
The 125kV Three-Phase Power Distribution Transformer is engineered to deliver reliable, efficient, and stable voltage transformation for high-voltage distribution networks and utility substations. Designed with a high-permeability silicon steel core and precision-wound conductors, it achieves low no-load loss, reduced operating noise, and excellent short-circuit withstand capability. The robust insulation system and optimized thermal design ensure long-term performance under continuous load and fluctuating grid conditions. Its reinforced tank structure and outdoor-rated configuration allow safe operation in demanding environments, including high temperature, humidity, and industrial pollution areas. Manufactured in compliance with IEC, IEEE, and ANSI standards, this transformer is suitable for modern power distribution systems requiring high reliability, operational safety, and extended service life.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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