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.
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.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
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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.
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