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.
500kV Oil-Immersed Power Transformer For Ultra-High Voltage Grid Solutions
NPC Electric 500kV Oil-Immersed Power Transformer is a critical component for national ultra-high voltage (UHV) backbones, engineered to transmit massive blocks of power with industry-leading efficiency. Utilizing premium, laser-scribed CRGO silicon steel in a multi-step lap core construction, this transformer minimizes magnetizing current and core noise. The active part is submerged in high-grade inhibited mineral oil, processed through advanced vacuum degasification to ensure maximum dielectric strength. Its robust, shield-type winding structure provides exceptional resistance against lightning surges and short-circuit mechanical stresses. Designed to meet IEC 60076 and IEEE standards, this 500kV unit is the definitive solution for long-distance energy dispatch, connecting remote generation hubs to major load centers while maintaining grid frequency and voltage stability.
33kV 35kV Solar Power Transformer
NPC Electric 33kV 35kV Solar Power Transformer is a specialized solution engineered to bridge the gap between solar inverters and the high-voltage utility grid. Unlike standard distribution units, these transformers are optimized to handle the pulsed DC-to-AC waveforms generated by modern PV inverters. Utilizing high-permeability magnetic cores and oxygen-free copper windings, they significantly reduce "No-Load" losses during non-sunlight hours, maximizing your project's Levelized Cost of Energy (LCOE). The robust tank design features enhanced heat dissipation fins, ensuring stable operation even under peak solar radiation in desert or tropical climates.
11kV to 0.8kV 1250 kVA Solar Power Transformer - Copper Wound High Efficiency PV Transformer
The 1250 kVA Solar Power Step-Up Transformer is a high-performance, inverter-duty solution specifically engineered for utility-scale photovoltaic (PV) installations. Designed to interface directly with 800V central or string inverters, this unit efficiently elevates voltage to 11kV for medium-voltage distribution. Unlike standard distribution transformers, our 1250 kVA model features 100% high-purity oxygen-free copper windings, offering superior thermal conductivity and lower losses. The core is constructed from laser-scribed, grain-oriented silicon steel to minimize eddy current losses, ensuring maximum energy harvest even during low-irradiance periods. With advanced harmonic mitigation technology, it withstands the high-frequency switching stresses typical of modern solar power conversion.
11kV – 33kV Solar Inverter Duty Transformer Up to 20MVA
The Reliable Solar Inverter Duty Transformer for Renewable Energy applications is engineered to support modern photovoltaic systems with capacities up to 20MVA and voltage levels from 11kV to 33kV. Designed to interface directly with solar inverters, this transformer ensures stable voltage conversion, excellent harmonic tolerance, and consistent performance under fluctuating generation conditions typical of renewable energy plants. The transformer adopts a robust oil-immersed structure with optimized thermal management to handle continuous load cycling and high ambient temperatures. Advanced magnetic core materials reduce no-load losses, while reinforced insulation systems improve dielectric strength and operational lifespan.
2000kVA 35kV Wind Turbine Step-Up Transformer for Onshore Wind Farms
The Wind Turbine Step-Up Transformer 2000kVA 35kV is purpose-built for onshore wind farms, enabling efficient voltage conversion from wind turbine generators to medium-voltage collection networks. Designed to operate reliably under fluctuating wind loads and harsh outdoor conditions, this transformer ensures stable power transmission and reduced energy losses across wind power systems. The oil-immersed insulation structure provides excellent thermal stability and long service life, while the optimized magnetic core minimizes no-load losses and acoustic noise. High-quality windings and reinforced insulation withstand frequent load variations caused by changing wind speeds.
500kVA 11kV Dry-Type Zigzag Grounding Transformer
The Dry-Type Zigzag Earthing/Grounding Transformer 500kVA 11kV is designed to provide an effective neutral grounding solution for medium-voltage power systems. By creating an artificial neutral point, the zigzag transformer limits earth fault currents, stabilizes system voltage, and enhances overall grid safety. Its zigzag winding configuration ensures balanced performance under normal operation while offering low zero-sequence impedance during ground faults. Featuring a dry-type insulation system, this transformer eliminates the risk of oil leakage and fire hazards, making it ideal for indoor substations and environmentally sensitive installations. The low-loss core design minimizes energy consumption and heat generation, ensuring high efficiency and long service life.
2000kVA 33kV Oil-Immersed Earthing Transformer with NGR
2000kVA 33kV Oil-Immersed Neutral Grounding Earthing Transformer with NGR is engineered to provide a stable and controlled neutral point for medium-voltage power systems. By combining an earthing transformer with an integrated Neutral Grounding Resistor (NGR), it effectively limits earth fault current, improves system protection coordination, and enhances operational safety. The oil-immersed design ensures excellent insulation performance, efficient heat dissipation, and long-term reliability under continuous operation. Optimized magnetic core construction reduces losses, while robust windings withstand short-time fault currents without mechanical degradation. The integrated NGR is precisely matched to system requirements, enabling accurate fault current limitation and minimizing damage to equipment during ground faults.
11kV 1500kVA Zigzag Wiring Earthing Transformer with NGR High Impedance
11kV 1500kVA Zigzag Wiring Earthing Transformer with NGR (High Impedance) is designed to provide a reliable artificial neutral point for medium-voltage power systems where controlled earth fault current is required. Utilizing a zigzag winding configuration, the transformer offers low zero-sequence impedance while maintaining balanced operation during normal conditions. The integrated high-impedance Neutral Grounding Resistor (NGR) effectively limits ground fault current, reducing thermal and mechanical stress on network equipment. This transformer is engineered for stable performance, high fault withstand capability, and long operational life. The robust insulation system and reinforced windings ensure safe operation under fault conditions, while the optimized core design minimizes losses.
100kVA–20MVA Solar Step-Up Transformer for PV Power Plants
The 100kVA–20MVA Solar Step-Up Transformer is engineered specifically for modern solar power plants, providing efficient voltage elevation from inverter output levels to medium- or high-voltage grid requirements. Designed for continuous operation under fluctuating solar loads, this transformer ensures stable power transmission, low energy losses, and high operational reliability. Featuring a robust oil-immersed insulation system, the transformer delivers excellent thermal performance and long service life even in harsh outdoor environments. High-quality copper or aluminum windings, optimized magnetic core design, and advanced cooling configurations contribute to superior efficiency and reduced lifecycle costs. The transformer complies with IEC and IEEE standards, making it suitable for utility-scale photovoltaic projects, distributed generation systems, and renewable energy substations. With flexible capacity coverage from 100kVA to 20MVA, it adapts seamlessly to small, medium, and large solar installations.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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