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.
Earthing Transformer
The Earthing Transformer (also known as Grounding Transformer or Neutral Grounding Transformer) is a specialized auxiliary transformer used in three-phase power systems to provide a neutral grounding point and a low-impedance path for zero-sequence currents during ground faults. It is essential in ungrounded delta or ungrounded wye systems (common in industrial, utility, and renewable energy applications) where no natural neutral exists, enabling safe fault current flow to ground, stabilizing voltages, limiting overvoltages on unfaulted phases, and supporting protective relaying. Typical features include three-phase construction, rated voltage matching system line-to-line (e.g., 11kV, 33kV, 35kV, up to 220kV+), short-time rating for fault current (e.g., 10–30 seconds at 100–1000A or more), neutral bushing for grounding connection.
750kVA Radial Feed Pad Mounted transformer To Honduras
The 750kVA Radial Feed Pad Mounted Transformer is a high-capacity, three-phase, oil-immersed distribution transformer specifically configured for radial feed (single-source primary supply) applications. It is ideal for utility substations, commercial complexes, industrial sites, and large residential developments requiring dependable step-down from medium-voltage primary lines to low-voltage secondary service. Fully compliant with ANSI C57.12.00, IEEE C57.12.90, IEEE C57.12.34 (for pad-mounted compartmental-type transformers), IEC 60076, and DOE 2016 efficiency standards (aligned with 2029 amendments for reduced losses), this 750 kVA unit provides excellent energy efficiency (>99.2% typical), low no-load/load losses, robust overload capability, and long-term reliability in outdoor environments. Typical specifications include mineral oil or FR3 natural ester fluid (ONAN cooling), aluminum or copper windings, primary voltage 13.8kV (13800V Delta or 12470GrdY/7200 common for Latin America/Honduras compatibility), secondary 480Y/277V (or 208Y/120V, custom options), BIL 95kV HV / 30kV LV, impedance 5.75–7.0% (±7.5%), ±2×2.5% taps, radial-feed dead-front design with three high-voltage bushings (H1, H2, H3), bayonet fuses + partial-range current-limiting fuses, load-break switch (optional), lightning arresters, pressure relief valve, oil level/temperature gauges, and ANSI 70 gray (or Munsell green) finish. Low sound level (<60 dB), strong short-circuit withstand, and radial-feed configuration suit single-source underground or overhead feeds.
1500kVA Radial Feed Pad Mounted transformer DOE 2016
The 1500kVA Radial Feed Pad-Mounted Transformer is designed for reliable medium-voltage power distribution in utility, commercial, and renewable energy (solar) applications. Engineered to comply with IEEE C57.12.34, C57.12.24, C57.12.00, and DOE 2016 efficiency standards, this pad-mounted transformer is ideal for step-down applications from 12.47kV to 480/277V. Standard features include mineral oil or FR3 natural ester fluid (ONAN cooling), aluminum or copper windings, primary voltage 13.8kV (13800V Delta or 12470GrdY/7200 common), secondary 480Y/277V (or 208Y/120V, custom options), BIL 95kV HV / 30kV LV, impedance 5.75–7.0% (±7.5%), ±2×2.5% taps, radial-feed dead-front design with three high-voltage bushings (H1, H2, H3), bayonet fuses + partial-range current-limiting fuses, load-break switch (optional), lightning arresters, pressure relief valve, oil level/temperature gauges, and ANSI 70 gray (or Munsell green) finish.
2000kVA Loop Feed 6.9kV Pad Mounted transformer
The 2000kVA Loop Feed 6.9kV Pad-Mounted Transformer is designed and manufactured to meet IEEE C57.12.34, IEEE C57.12.24, and IEEE C57.12.00 standards, as well as ASTM D6871 oil test requirements. It features a dead-front loop-feed design, aluminum windings, primary voltage of 6.9kV, and secondary voltage of 480/277V with ±2×2.5% HV taps for voltage adjustment. This transformer uses NEMA-standard spade-type low-voltage terminals with 12 holes, offers ONAN cooling, and is filled with mineral oil for reliable insulation and thermal performance. Ideal for substation projects in demanding environments, it is UL certified and built for step-down operation with a 95/30kV BIL rating. Standard configuration includes mineral oil or FR3 natural ester fluid (ONAN cooling), aluminum or copper windings, primary voltage 6.9kV (6900V Delta or 6900GrdY/3985 common for loop-feed systems), secondary 480Y/277V (or 208Y/120V, 600Y/347V, custom), BIL 75kV HV / 30kV LV, impedance 5.75–7.5% (±7.5%), ±2×2.5% taps, loop-feed dead-front design with six high-voltage bushings (three per source: H1A/H2A/H3A and H1B/H2B/H3B), dual load-break switches (one per feed), bayonet fuses + partial-range current-limiting fuses (dual sets), lightning arresters, pressure relief valve, oil level/temperature gauges, and ANSI 70 gray (or Munsell green) finish.
33kV 600A Neutral Zig-zag Grounding Reactor Transformer
The 33kV 600A Neutral Zig-zag Grounding Reactor Transformer is a high-performance grounding solution designed to meet the strict requirements of IEC 60076-1, IEC 60076-5, IEC 60076-20, and GB/T 1094.6 standards, with oil quality tested according to ASTM D6871. This grounding transformer is engineered to provide effective neutral grounding, enhanced system stability, and fault current limitation in medium- and high-voltage networks. With a primary voltage of 33kV and 11432.0kVA rating, the transformer supports 100A power rating for 10 seconds, making it ideal for system grounding applications in substations, industrial facilities, and renewable energy projects. The ONAN cooling method provides efficient heat dissipation for continuous operation, while the use of high-grade mineral insulating oil ensures long-term performance and compliance with international safety standards.
Oil Immersed Power Transformer 200kVA for Substation With Transformer Oil
The oil-immersed power transformer, rated at 200kVA, is designed for use in substations, efficiently converting voltage. It is equipped with high-quality transformer oil, which enhances heat dissipation and prolongs the lifespan of the equipment. Ideal for various power supply applications, it excels in industrial environments requiring stable voltage and high performance.
630kVA Three-Phase Oil-Immersed Outdoor Substation Transformer | 220V to 380V Step-Up Transformer
This 630kVA three-phase oil-immersed transformer is designed for outdoor substations, providing reliable voltage conversion from 220V to 380V. With a robust oil-immersed cooling system, it ensures excellent heat dissipation, stable performance, and long service life. Ideal for industrial facilities, commercial power distribution, and utility applications, this step-up transformer delivers consistent efficiency even under heavy load conditions.
750kVA 3-Phase Oil-Immersed Outdoor Substation Transformer
A 750kVA 3-phase oil-immersed outdoor substation transformer is designed for stable and efficient power distribution in industrial, commercial, and utility applications. Built with high-quality insulation and premium transformer oil, it provides excellent cooling performance and long-term reliability. The transformer ensures accurate current measurement and voltage conversion, making it ideal for outdoor substations operating under demanding conditions.
25000kVA Oil-Immersed Copper Transformer For Substation
The 25,000kVA oil-immersed copper transformer is engineered for high-standard power distribution in large industrial facilities, utility networks, and high-voltage substations. Built with premium pure copper windings, it delivers exceptional electrical conductivity, reduced losses, and long-term operational stability. The oil-immersed cooling system ensures efficient heat dissipation, allowing the transformer to perform reliably under continuous heavy load conditions.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
Related Articles
Understand the product's characteristics, structure, and applications.
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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