Transformers
Power Transformer
Facilitate efficient bulk power transmission with our high-performance Power Transformers. As critical components of large-scale power grids, these transformers are engineered for robust operation in generating stations, transmission substations, and industrial main power supply. Our Power Transformers are available in a vast range of MVA ratings and ultra-high voltage classes, typically using oil-filled designs for optimal cooling and dielectric strength. They ensure minimal energy loss, precise voltage regulation, and superior operational stability, crucial for national and international grid interconnections. Trust our compliant, durable, and custom-engineered solutions for your most demanding power infrastructure projects.
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.In-Depth Analysis
Power 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.
Comparative Analysis of Efficiency and Loss
Compared to the industry average, 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
+30%
Reduced Iron Loss
-35%
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
96%
Environmental Adaptability Analysis
Power 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
Discover why our power transformers are trusted worldwide for efficiency, safety, and reliability.
Power Transformers Manufacturer
NPC Electric is a trusted power transformer manufacturer dedicated to delivering reliable and efficient power solutions for utility, industrial, and renewable energy sectors. Our range of power transformers includes oil-immersed power transformers, dry type power transformers, and substation transformers, designed to handle high voltage transmission and large-capacity distribution.
Each unit is engineered for maximum efficiency, low losses, and long service life. As a leading transformer manufacturer, NPC Electric adheres to international standards such as IEC, IEEE, and ANSI, ensuring global compatibility and safety. With advanced production facilities, strict quality control, and custom design capabilities, we provide high-performance three-phase power transformers tailored to diverse grid and project requirements. Choose NPC Electric for dependable power transformation and sustainable energy solutions worldwide.
Unrivaled Reliability & Robust Durability
NPC Electric Power Transformers offer unrivaled reliability and boast a robust design, specifically built for continuous, heavy-duty operation within demanding high-voltage environments. Each transformer undergoes stringent quality control and testing, utilizing premium insulation materials, advanced cooling systems (e.g., ONAN, ONAF, OFAF), and durable construction techniques. This ensures exceptional mechanical strength and a high short-circuit withstand capability, minimizing the risk of failures and extending operational lifespan. By choosing our reliable power transformers, you secure the unwavering stability and uninterrupted power flow essential for the backbone of any modern electrical grid infrastructure.
Stable Voltage & Grid Performance
Our Power Transformers provide superior voltage regulation, crucial for maintaining grid stability and ensuring high-quality power delivery across vast distances. Equipped with advanced tap changers (both On-Load Tap Changer (OLTC) and Off-Circuit Tap Changer (OCTC) options), these transformers precisely adjust output voltage to compensate for load fluctuations and system imbalances. This capability minimizes voltage sags or swells, protecting sensitive equipment and ensuring consistent power quality for industrial, commercial, and residential consumers. By integrating our stable power transformers, you optimize the performance and responsiveness of your transmission and distribution networks, securing a robust foundation for modern power systems.
Custom Solutions for Diverse Needs
We specialise in providing custom-engineered solutions for Power Transformers, catering to the diverse and complex requirements of various high-voltage applications. Our expert team collaborates closely with clients to design transformers with specific ratings, impedance values, cooling configurations, and auxiliary equipment. Whether for new substation projects, grid expansion, or renewable energy integration, we deliver tailored designs that optimise performance, space utilisation, and cost-effectiveness. By choosing our custom power transformers, you gain a purpose-built solution that perfectly integrates into your unique electrical infrastructure, ensuring peak performance and future scalability for your critical power needs.
Product Show
Explore the detailed design and practical application scenarios of power transformers
220kV Electrical Transformer
220kV transformer product show
350kV Power Transformer
350kV transformer product completed
Step Up Power Transformer
step up transformer is a power transformer
Step Up Transformer Font
step up transformer font view
Power Transformer Oil Temperature
transformer oil temperature design
750kV Power Transformer
750kV transformer design struture
Power Transfomer Oil Conservator
transfomer oil conservator design
Power Transformer Produce Line
worker produce power transformer
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
Power transformers have been successfully applied in many projects and have been highly praised by customers.
Venezuela Residential Area
CompletedProvide stable and reliable power conversion solutions for the residential area to meet diverse production needs.
Country：Venezuela
Model：220kV Power Transformer x 5
Uruguay Data Center
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Uruguay
Model：350kV Power Transformer x 10
Dominican Factory
CompletedNPC transformers provide safe, efficient, and reliable power distribution in the Dominican.
Country：Dominican
Model：450kVA Power Transformer x 4
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
-
What is the power transformer?
A power transformer is a type of electrical transformer designed to transfer energy between different voltage levels in power generation and distribution systems. It operates at high efficiency, enabling stable voltage transmission across long distances. NPC Electric manufactures step up and step down power transformers to support power plants, substations, and industrial networks worldwide. -
Why do we use power transformers?
We use power transformers to adjust voltage levels for efficient power transmission and distribution. A step up transformer increases voltage for long-distance transmission, minimizing energy loss, while a step down transformer reduces voltage for safe end-user consumption. These electrical transformers are essential for maintaining grid stability and efficient energy flow. -
What is the difference between a step up and a step down transformer?
The main difference lies in voltage conversion. A step up transformer raises the voltage from a lower level to a higher level for transmission, while a step down transformer decreases voltage to supply local or residential loads. Both are key components in modern power transformer systems ensuring efficient and safe energy delivery. -
Where are power transformers used?
Power transformers are widely used in electrical substations, industrial plants, renewable energy systems, and transmission networks. Whether a step up transformer for a solar power station or a step down transformer for factory distribution, they play a crucial role in converting and controlling electrical energy efficiently. -
How do power transformers improve energy efficiency?
Power transformers improve energy efficiency by reducing voltage-related losses during transmission. Using step up and step down transformers, electrical utilities can deliver power over long distances with minimal waste. NPC Electric’s high-efficiency power transformers are engineered with low-loss cores, advanced insulation, and optimized cooling systems to ensure maximum performance. -
What are the main components of a power transformer?
The key components of a power transformer include the core, windings, insulation, cooling system, and protective enclosure. The core carries magnetic flux, while the primary and secondary windings handle voltage transformation. NPC Electric designs electrical transformers with high-grade silicon steel cores and advanced insulation to ensure high efficiency, reliability, and safety.
Welcome your inquiry
Honesty, Integrity, Frugality, Activeness and Passion