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.
Zigzag Neutral Grounding Transformer to IEC Standards – Factory Direct Sales
Zigzag Neutral Grounding Transformer manufactured to IEC standards is a reliable solution for establishing an artificial neutral point in medium-voltage power systems. Designed with a precision zigzag winding configuration, it provides low zero-sequence impedance during ground faults while maintaining balanced operation under normal conditions. This enables effective limitation of earth fault currents, improved system protection coordination, and enhanced grid safety. Produced under strict IEC compliance, the transformer features a robust core design, high-quality conductors, and reinforced insulation systems to ensure long-term stability and fault withstand capability. Factory direct sales allow for flexible engineering support, competitive pricing, and shorter delivery cycles.
11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Discover our premium 11/0.4kV 630kVA Oil-Immersed Power Transformer, engineered for superior high-efficiency distribution in modern electrical grids. This robust transformer features advanced silicon steel cores that minimize energy losses, ensuring up to 98% efficiency under full load. Ideal for urban and rural power networks, it incorporates eco-friendly insulating oil with high dielectric strength, providing reliable voltage step-down from 11kV to 0.4kV while handling demanding loads up to 630kVA. Built with corrosion-resistant tanks and precision-wound copper coils, this distribution transformer guarantees long-term durability, reduced maintenance, and compliance with international standards like IEC 60076. Whether for residential complexes, commercial facilities, or industrial applications, it optimizes power delivery, lowers operational costs, and supports sustainable energy practices. Experience unmatched performance with this high-efficiency oil-immersed transformer designed for seamless integration into your power system.
7MVA 22kV to 6.6kV Power Transformer ONAN Cooling Low Loss
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.
33/0.4kv 2000kVA Power Distribution Transformer
Experience superior power reliability with our 33/0.4kV 2000kVA Power Distribution Transformer, a cutting-edge solution designed for efficient medium-to-low voltage conversion in extensive electrical networks. This oil-immersed transformer incorporates high-permeability grain-oriented steel cores and optimized copper windings to deliver exceptional efficiency, low noise operation, and minimal energy losses even under full load conditions. The robust conservator-type tank filled with premium inhibited mineral oil ensures excellent cooling, high breakdown voltage, and protection against environmental factors. Engineered for long-term performance in challenging climates, it features anti-corrosion coatings, sealed bushings, and overload tolerance up to 150% for short durations. Fully compliant with IEC 60076, GB/T 1094, and other global standards, this 2000kVA distribution transformer supports sustainable energy infrastructure by reducing carbon footprint through enhanced efficiency and reliable power delivery to end users.
350kVA 10kV/0.4kV Three Phase Oil Immersed Power Distribution Transformer
Elevate your power distribution system with the advanced 350kVA 10kV/0.4kV Three Phase Oil Immersed Power Distribution Transformer, expertly crafted for optimal performance and energy savings in modern electrical infrastructures. This three-phase transformer employs cutting-edge amorphous metal cores and high-conductivity copper windings to significantly reduce core losses and achieve outstanding efficiency levels exceeding 98.5%. The fully sealed oil-immersed design with superior PCB-free mineral oil provides exceptional insulation, natural cooling, and resistance to overloads, ensuring stable operation in varied conditions. Equipped with low-noise technology and a durable corrugated tank for enhanced heat dissipation, it offers quiet performance and extended lifespan over 30 years. Meeting stringent standards such as IEC 60076 and EN 50588-1 for eco-friendly operation, this 350kVA transformer delivers reliable voltage transformation, minimizes downtime, and contributes to lower electricity costs for commercial and residential networks.
2500kVA Substation Transformer
The 2500kVA Substation Transformer stands as a robust, high-capacity solution engineered for medium-voltage power substations, delivering reliable step-down transformation with exceptional energy efficiency and durability. This oil-immersed unit features premium grain-oriented silicon steel laminations and low-loss copper windings to achieve superior no-load and load efficiency ratings, often exceeding 99% under typical operating conditions. Designed with ONAN cooling for natural convection reliability and optional ONAF upgrades for increased capacity during peak loads, it includes a conservator tank with high-quality mineral or biodegradable ester oil for optimal insulation and fire safety. Built to withstand demanding environments, it incorporates advanced protection like pressure relief valves, Buchholz relays, and temperature monitoring, while maintaining low noise levels and extended service life beyond 35 years. Compliant with IEC 60076, IEEE, and CSA standards, this substation transformer ensures stable voltage regulation, minimal losses, and seamless integration into utility, industrial, and renewable energy grids for cost-effective, sustainable power distribution.
300kVA Single Phase Pad Mounted Transformer
300kVA Single Phase Pad Mounted Transformer is a compact and efficient solution tailored for underground residential distribution (URD) systems and loop-feed applications. This fully sealed, oil-immersed transformer features high-efficiency electrical steel cores and robust aluminum or copper windings to deliver minimal losses and superior voltage regulation from high-voltage inputs like 13.8kV or 34.5kV down to 120/240V or 277/480V secondary. The environmentally friendly PCB-free dielectric fluid ensures excellent cooling and insulation while meeting ANSI/IEEE standards for loop or radial feed configurations. Ideal for urban and suburban settings, this pad-mounted transformer provides quiet operation, high overload capacity.
315kVA Single Phase Pad Mounted Transformer
315kVA Single Phase Pad Mounted Transformer, engineered for seamless integration into underground power distribution systems, particularly in residential and commercial loop-feed setups. This compact, oil-filled transformer utilizes advanced high-permeability steel cores and precision-engineered windings to offer exceptional energy efficiency, low operating temperatures, and reduced sound levels for discreet urban installations. Compliant with ANSI C57.12.38 and IEEE standards, this single-phase padmount transformer ensures reliable voltage conversion from primary voltages up to 34.5kV to standard secondary outputs like 120/240V, supporting radial or loop configurations with high short-term overload capability for growing communities.
630kVA Single Phase Pad Mounted Transformer
Elevate your underground power distribution with the robust 630kVA Single Phase Pad Mounted Transformer, specifically designed for high-demand residential and commercial loop-feed networks. This oil-immersed, single-phase unit incorporates premium electrical steel laminations and heavy-duty windings to minimize energy losses and provide outstanding thermal performance under continuous loads. Meeting ANSI C57.12.38 and IEEE C57.12.90 standards, this 630kVA padmount transformer delivers precise voltage transformation from primary levels up to 34.5kV to common secondary voltages like 120/240V or 277/480V, supporting extended overloads and long-term reliability in densely populated areas.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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