Transformers
Distribution Transformer
Optimize local power grids with our highly efficient Distribution Transformers. Designed to step down primary voltage to a level suitable for end-users, these transformers are the backbone of reliable local power distribution. Our Distribution Transformers are available in both oil-filled and dry-type configurations, in various kVA ratings and voltage classes. They feature optimized core designs and high-quality conductors to ensure minimal energy loss, superior voltage regulation, and robust overload capacity. Ideal for residential, commercial, and light industrial applications, our transformers guarantee stable and efficient power delivery, crucial for modern, responsive utility networks.
40MVA 110kV Three Phase Oil Immersed Transformer for Substation
The 40MVA 110kV Three Phase Oil Immersed Transformer is engineered for reliable high-voltage transmission and distribution in substations and power plants. Featuring high-purity copper windings, advanced ONAN/ONAF cooling, and on-load tap changer (OLTC ±8×1.25%), it delivers superior efficiency and minimal no-load/loss performance (SZ11/SZ13 series). Fully compliant with IEC 60076, GB 6451, and IEEE standards, it withstands 200kV lightning impulse and offers partial discharge below 10pC. The corrugated tank design ensures optimal heat dissipation and mechanical strength in harsh environments. Ideal for 110/33kV, 110/11kV, or 110/6.3kV step-down applications. Vacuum oil filling and nitrogen sealing guarantee long-term insulation integrity. Trusted by utilities worldwide for stable, maintenance-free operation over 30+ years. Contact us for technical datasheet and competitive pricing.
42MVA 220kV Three Phase Oil Filled Transformer for Substation
The 42MVA 220kV Three Phase Oil Filled Transformer is specifically engineered for high-voltage transmission substations and utility grid applications. Featuring 99.9% electrolytic copper windings, advanced ONAN/ONAF cooling, and ±8×1.25% on-load tap changer, it ensures ultra-low no-load and load losses (SZ13 series available). Fully compliant with IEC 60076, GB/T 6451, and ANSI/IEEE standards, it successfully passes 460 kV lightning impulse, PD level below 10 pC, and induced test at 1.5Um/√3. Robust corrugated tank and conservator design provide excellent thermal and mechanical performance in extreme climates. Ideal for 220/33kV, 220/11kV, or 220/6.6kV step-down configurations. Vacuum oil processing and nitrogen blanketing guarantee long-term reliability and 35+ year service life. Trusted by national grids worldwide. Contact us for datasheet, pricing, and customization options.
250MVA 330kV High-Voltage Oil-Immersed Distribution Transformer for Grid & Substation
The 250MVA 330kV High-Voltage Oil-Immersed Distribution Transformer is engineered for reliable and efficient power transmission in large utility grids and high-demand substations. Designed with advanced insulation and a durable oil-immersed cooling system, it ensures excellent thermal stability and long service life. The high-voltage 330kV configuration provides exceptional performance in long-distance power delivery, minimizing losses and improving grid stability. Its precision-wound copper coils, high-strength core materials, and robust tank structure guarantee safe operation under fluctuating load conditions. With strong short-circuit resistance, high dielectric strength, and low noise operation, this transformer meets stringent international standards. It is widely used in national grid projects, power plants, and heavy-industry energy networks, supporting continuous, stable, and efficient power distribution.
370MVA 750kV Oil-Immersed High-Voltage Transformer for Power Transmission
The 370 MVA 750 kV Oil-Immersed High-Voltage Transformer is designed for ultra-high-voltage (UHV) power transmission systems requiring exceptional reliability, stability, and long-distance energy delivery. With a robust oil-immersed insulation structure and high-grade copper windings, this transformer offers outstanding dielectric strength, low partial discharge, and excellent thermal performance. Engineered for 750kV grid networks, it effectively reduces transmission losses, enhances voltage regulation, and ensures safe operation under demanding load variations. Its precision-built core, advanced cooling system, and reinforced tank construction enable superior efficiency, extended service life, and high short-circuit resistance. Ideal for national power grid projects, long-distance transmission corridors, high-capacity substations, and UHV interconnection systems, this transformer delivers consistent and secure performance in critical large-scale power infrastructures.In-Depth Analysis
Distribution 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
Distribution 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 Distribution transformers — from oil-immersed transformers and substation transformers — are trusted worldwide for efficiency, safety, and reliability.
Oil-Immersed Transformers Manufacturer
As a leading oil-immersed transformer manufacturer, NPC Electric specializes in designing and producing high-performance oil-immersed distribution transformers for power utilities, industrial facilities, and commercial networks. Our oil-immersed transformers are built with premium-grade materials and advanced insulation systems to ensure excellent cooling performance, high efficiency, and long service life.
We offer a full range of capacities and voltage ratings, including power transformers and substation transformers, customized to meet specific project requirements. Every unit is tested under strict IEC and ANSI standards to guarantee superior reliability, low noise, and minimal maintenance. Whether you need a standard oil-filled unit or a specialized design for challenging environments, NPC Electric delivers proven transformer solutions trusted worldwide.
We offer a full range of capacities and voltage ratings, including power transformers and substation transformers, customized to meet specific project requirements. Every unit is tested under strict IEC and ANSI standards to guarantee superior reliability, low noise, and minimal maintenance. Whether you need a standard oil-filled unit or a specialized design for challenging environments, NPC Electric delivers proven transformer solutions trusted worldwide.
Substation Transformers Manufacturer
As a trusted substation transformer manufacturer, NPC Electric provides high-quality transformer solutions designed for reliable power distribution and grid integration. Our substation transformers are engineered for superior performance, efficiency, and safety — ideal for power plants, substations, and large-scale industrial facilities.
We manufacture a wide range of power transformers and distribution transformers, including oil-immersed substation transformers built to meet IEC, IEEE, and ANSI standards. With advanced production technology, strict quality testing, and customized voltage configurations, NPC Electric ensures stable operation, minimal energy loss, and long service life. As a professional substation transformer manufacturer, we are committed to delivering dependable products and technical support to customers worldwide.
We manufacture a wide range of power transformers and distribution transformers, including oil-immersed substation transformers built to meet IEC, IEEE, and ANSI standards. With advanced production technology, strict quality testing, and customized voltage configurations, NPC Electric ensures stable operation, minimal energy loss, and long service life. As a professional substation transformer manufacturer, we are committed to delivering dependable products and technical support to customers worldwide.
Distribution Transformer Installation
NPC Electric provides professional distribution transformer installation services to ensure safe, efficient, and reliable power delivery for every project. Our experienced engineering team manages the full installation process — from design consultation and site preparation to final commissioning. Whether you require an oil-immersed transformer for urban distribution or a substation transformer for industrial or utility applications, we deliver precise and compliant installation according to IEC and IEEE standards.
Each distribution transformer installation is performed with strict safety controls and advanced testing procedures to guarantee long-term stability and performance. NPC Electric also offers ongoing distribution transformer maintenance and technical support to help customers achieve continuous, trouble-free operation.
Each distribution transformer installation is performed with strict safety controls and advanced testing procedures to guarantee long-term stability and performance. NPC Electric also offers ongoing distribution transformer maintenance and technical support to help customers achieve continuous, trouble-free operation.
Strict Transformer Testing & Quality Control
At NPC Electric, we implement strict transformer testing and quality control throughout every stage of production to ensure the highest level of performance and reliability. Each distribution transformer, including oil-immersed transformers and substation transformers, undergoes rigorous electrical, mechanical, and insulation tests before delivery.
Our testing process follows international standards such as IEC, IEEE, and ANSI, covering parameters like load loss, temperature rise, insulation resistance, and oil quality. Every unit is inspected using advanced equipment and can be verified by third-party agencies like SGS or BV. With our strict transformer quality control, customers receive products that guarantee efficiency, safety, and long-term durability in any environment.
Our testing process follows international standards such as IEC, IEEE, and ANSI, covering parameters like load loss, temperature rise, insulation resistance, and oil quality. Every unit is inspected using advanced equipment and can be verified by third-party agencies like SGS or BV. With our strict transformer quality control, customers receive products that guarantee efficiency, safety, and long-term durability in any environment.
Product Show
Explore the detailed design and practical application scenarios of distribution transformers
10kv Oil-immersed Transformers
10kv oil-immersed transformers shows
20kv Oil-immersed Transformers
20kv oil-immersed transformers shows
Oil-immersed Type Transformer
transformer oil-immersed type
100kva Oil-immersed Transformer
100kva transformer top structure
1000kva Substation Transformer
1000kva substation transformer front structure
Substation Power Transformer
substation power transformer structure
Substation Transformers
transformer and substation
HV Bushing LV Bushing
transformer HV Bushing LV Bushing
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
Distribution transformers have been successfully applied in many projects and have been highly praised by customers.
Jordan Smart Factory
CompletedProvide stable and reliable power conversion solutions for the smart factory to meet diverse production needs.
Country：Jordan
Model：75kVA Oil-immersed Transformer x 14
Guyana Power & Light Inc
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Guyana
Model：13.8kV - 0.48Y/0.22kV, 3MVA Substation Transformer x 5
Chile Factory
Completed22kV Oil-immersed transformers provide safe, efficient, and reliable power distribution in Chile.
Country：Chile
Model：22kv Oil-immersed Transformers x 20
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
-
What is a distribution transformer and how does it work?
A distribution transformer is used to step down high voltage electricity from the power grid to a lower voltage suitable for residential, commercial, or industrial use. It plays a critical role in local power networks by ensuring safe and efficient energy delivery. Common types include the oil-immersed transformer and the substation transformer, both designed for reliable voltage conversion and long service life. -
What is the difference between an oil immersed transformer and a substation transformer?
An oil-immersed transformer uses insulating oil for cooling and insulation, making it ideal for outdoor or high-load applications. A substation transformer, on the other hand, is usually installed within a power substation to manage voltage transformation between transmission and distribution systems. Both types are essential components of a distribution transformer network. -
How do I choose the right distribution transformer for my project?
When selecting a distribution transformer, consider factors such as power capacity (kVA rating), voltage requirements, cooling method, and installation environment. For rural or residential networks, an oil immersed transformer may be ideal, while industrial or utility projects often require a substation transformer for higher capacity and grid integration. Consulting a professional distribution transformer manufacturer ensures optimal performance and safety. -
What standards are followed in manufacturing distribution transformers?
All distribution transformers produced by NPC Electric comply with international standards, including IEC, IEEE, and ANSI. Each oil-immersed transformer and substation transformer undergoes strict testing for insulation resistance, temperature rise, and load loss to guarantee safety, efficiency, and durability. These quality control measures ensure reliable operation under diverse environmental conditions. -
How often should a distribution transformer be inspected or maintained?
Regular distribution transformer maintenance is essential for long-term performance. It is recommended to inspect oil-immersed transformers every 6–12 months for oil quality, temperature, and insulation status. Substation transformers should also undergo preventive testing, such as dielectric strength and load checks, to prevent power outages and extend service life. -
Can NPC Electric provide installation and after-sales support for distribution transformers?
Yes. As a professional distribution transformer manufacturer, NPC Electric offers complete transformer installation, commissioning, and technical support services. Our team ensures that every oil-immersed transformer and substation transformer is properly installed, tested, and maintained according to global standards. We also provide long-term service contracts to ensure stable and efficient operation.
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