Transformers
Epoxy Resin Cast Dry-Type Transformer
30kVA Dry Type Transformer
The 30kVA Dry type transformer complies with ANSI, CSA, NEMA, IEEE, IEC, GB, and DOE standards. NPC ELECTRIC manufactures Dry type transformer in strict accordance with the highest industry and international standards. Our team of highly skilled professionals ensures these rigorous standards are meticulously upheld in daily operations.
50kVA Dry Type Transformer
NPC ELECTRIC 50kVA dry-type transformer is an efficient, safe and environmentally friendly power transformer. It adopts dry insulation structure and does not require oil immersion cooling. It is suitable for various small and medium-sized power systems. It is widely used in industries, commercial buildings and power distribution, providing users with stable and reliable power supply.
80kVA Dry Type Transformer
80kVA dry-type transformer launched by NPC ELECTRIC adopts advanced dry insulation technology, has the advantages of high efficiency, environmental protection, and safety, and is widely used in industrial, commercial, and residential power systems. The transformer has a compact design, strong load-bearing capacity, stable operation, and effectively reduces energy loss. The oil-free structure reduces the risk of fire, meets modern green environmental standards, and is suitable for use in environments with high requirements for power stability and low noise.
100kVA Dry Type Transformer
The 100kVA dry-type transformer adopts efficient dry-type insulation technology and is designed for industrial, commercial and residential power systems. With its excellent performance and compact structure, the transformer provides stable and reliable power support and is suitable for small and medium-sized power distribution needs. Through strict quality control, NPC ELECTRIC's 100kVA dry-type transformer provides users with high-quality, low-maintenance power solutions.
200kVA Dry Type Transformer
200kVA Dry Type Transformer is designed for high efficiency and reliable performance in various industrial and commercial applications. With a robust and compact design, it ensures safe operation without the need for external cooling fluids. Ideal for environments where space and fire safety are critical, this transformer provides reliable power distribution while minimizing environmental impact. Built with advanced materials and precision engineering, it offers excellent durability, low maintenance, and energy savings, making it the perfect choice for demanding electrical needs.
400kVA Dry Type Transformer
The NPC ELECTRIC 400kVA Dry Type Transformer is engineered for efficient and reliable power distribution in industrial, commercial, and utility applications. With a compact, fire-safe design, it operates without the need for oil or other cooling fluids, making it ideal for environments with strict safety and environmental standards. Designed to withstand heavy loads, it is the perfect solution for demanding electrical requirements, providing a sustainable and cost-effective option for modern electrical systems.
500kVA Dry Type Transformer
NPC ELECTRIC 500kVA Dry-Type Transformer offers reliable and efficient power distribution with a compact, oil-free design. It ensures safe, low-maintenance operation with advanced insulation and cooling systems, making it ideal for industrial and commercial use. With a capacity of 500kVA, it delivers stable performance while being environmentally friendly and cost-effective.
630kVA Dry Type Transformer
NPC ELECTRIC 630kVA Dry-Type Transformer is a compact, oil-free solution for reliable power distribution. With advanced insulation and cooling systems, it ensures safe, low-maintenance operation, making it ideal for industrial and commercial applications. Offering 630kVA capacity, it delivers efficient, environmentally friendly, and cost-effective performance.
800kVA Dry Type Transformer
NPC ELECTRIC 800kVA Dry-Type Transformer provides reliable, oil-free power distribution with a compact design. Featuring advanced insulation and cooling systems, it ensures safe, low-maintenance operation for industrial and commercial use. With 800kVA capacity, it delivers efficient and environmentally friendly performance.In-Depth Analysis
Dry type 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
Dry type 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 dry-type transformers are trusted worldwide for efficiency, safety, and reliability.
Dry Type Transformers Manufacturer
NPC Electric is a trusted dry-type transformer manufacturer committed to delivering high-quality, energy-efficient, and safe transformer solutions. Our product range includes cast resin dry-type transformers, three-phase dry-type transformers, and dry-type distribution transformers, widely used in commercial buildings, hospitals, data centers, and industrial plants.
Unlike oil-filled models, dry-type transformers use air or epoxy resin for cooling and insulation, eliminating the risk of leakage or fire, making them ideal for indoor transformer installations. Each low-voltage and medium-voltage dry-type transformer is engineered for superior thermal performance, low noise, and minimal maintenance. As a global power transformer manufacturer, NPC Electric ensures all units meet IEC, IEEE, and ANSI standards, providing durable and environmentally friendly power solutions for modern electrical networks.
Dry Type Transformers Types
There are several dry-type transformer types, each designed to meet specific performance, safety, and installation requirements. The most common are the cast resin dry type transformer (CRT) and the vacuum pressure impregnated (VPI) dry type transformer. The cast resin type features epoxy resin encapsulation that protects windings from moisture, dust, and corrosion—making it ideal for harsh or humid environments. The VPI dry-type transformer, on the other hand, uses varnish impregnation for excellent mechanical strength, low noise, and efficient cooling performance.
NPC Electric also manufactures three-phase dry-type transformers and dry-type distribution transformers for low voltage and medium voltage networks. Each dry-type power transformer is engineered for high efficiency, fire safety, and long service life, ensuring reliable power delivery across industrial, commercial, and infrastructure applications worldwide.
High Efficiency & Reliable Performance
NPC Electric’s dry-type transformers are engineered to deliver high efficiency and reliable performance across various power distribution systems. Using premium-grade silicon steel cores and advanced vacuum casting technology, our cast resin dry-type transformers and three-phase dry-type transformers minimize no-load and load losses, improving overall energy utilization. Each dry-type distribution transformer ensures excellent voltage regulation, low noise, and stable performance even under fluctuating loads or harsh environments.
Designed for both indoor and outdoor use, these energy-efficient transformers reduce operational costs while maintaining superior thermal stability. All units undergo strict testing under IEC and IEEE standards, guaranteeing dependable long-term operation. Whether for commercial, industrial, or renewable energy applications, NPC Electric’s low-loss dry-type transformers provide exceptional reliability and consistent power delivery with minimal maintenance.
Versatile Applications & Global Standards
NPC Electric’s dry-type transformers are designed for versatility, safety, and global compatibility. Our dry-type distribution transformers, including three-phase and cast-resin dry-type transformers, are widely used in commercial complexes, industrial facilities, hospitals, data centers, transportation systems, and renewable energy projects. These low-voltage and medium-voltage transformers offer superior performance in environments where oil-filled units are not suitable, such as indoor spaces or fire-sensitive areas.
Each transformer is manufactured under strict IEC, IEEE, and ANSI standards, ensuring consistent quality and international compliance. As a trusted global transformer manufacturer, NPC Electric provides custom-engineered dry-type transformers tailored to regional grid requirements, voltage ratings, and installation conditions. Our solutions guarantee reliability, energy efficiency, and long-term safety in diverse applications worldwide.
Product Show
Explore the detailed design and practical application scenarios of dry-type transformers
75kVA Dry Type Transformer
75kva transformer font view
Dry Type Transformer Warning
transformer danger warnings
Dry Type Transformer Installation
workers assemble dry-type transformers
45kVA Dry Type Transformer
45kVA transformer base package
Dry Type Transformer Base Design
transformer ground base fixed design
Dry Type Transformer Top Design
transformer top design and base package
Dry Type Transformer Winding
transformer winding accessories material
750kV Dry Type Transformer
220kV transformer production completed
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
Dry-type 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：75kVA Dry Type Transformer x 20
Rwanda Data Center
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Rwanda
Model：167kVA Dry Type Transformer x 15
Panama Factory
CompletedNPC transformers provide safe, efficient, and reliable power distribution in Surinam.
Country：Panama
Model：150kVA Dry Type Transformer x 30
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
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How to test a dry type transformer?
Testing a dry type transformer involves several procedures to ensure electrical and mechanical reliability. Common transformer testing methods include insulation resistance measurement, turns ratio testing (TTR), winding resistance, and dielectric strength tests. For cast resin dry type transformers, partial discharge and temperature rise tests are also essential to detect insulation degradation. NPC Electric conducts all tests according to IEC 60076 and IEEE C57.12 standards to guarantee optimal performance and long service life of each dry type distribution transformer. -
Do dry transformers require a special enclosure?
Yes, dry type transformers may require a special enclosure, depending on their installation environment. For indoor installations, ventilated enclosures ensure proper cooling and dust protection. For outdoor dry type transformers, weatherproof or IP-rated enclosures protect against moisture, corrosion, and debris. NPC Electric offers custom dry type transformer enclosures designed for industrial, marine, and renewable energy applications, ensuring safe operation and compliance with IEC and ANSI protection standards. -
What are the faults of dry type transformers?
Common dry type transformer faults include insulation breakdown, overheating, winding deformation, and partial discharge. These issues often result from overloading, poor ventilation, or contamination from dust and moisture. Regular transformer testing and maintenance help identify and prevent such faults early. NPC Electric’s cast resin dry type transformers are engineered with advanced insulation systems and thermal protection to minimize fault risks and enhance long-term reliability. -
How to maintenance a dry type transformer?
Proper maintenance of a dry type transformer includes periodic inspections, cleaning, and monitoring of temperature, load, and insulation condition. Dust and debris should be removed from ventilation openings to prevent overheating. For cast resin dry type transformers, regular visual inspections can detect cracks or discoloration. Electrical testing such as insulation resistance and partial discharge tests should be performed annually. Following manufacturer guidelines ensures maximum reliability and extended service life for any dry type distribution transformer. -
How to ground a dry type transformer?
Grounding a dry type transformer is essential for electrical safety and system stability. The transformer’s core and enclosure must be connected to the facility’s grounding system using approved copper conductors. The neutral of the secondary winding is typically grounded to prevent overvoltage during faults. Proper grounding ensures safe operation, minimizes electrical shock hazards, and protects equipment from lightning or transient surges. NPC Electric designs all dry type transformers in compliance with IEC and IEEE grounding standards for safe and efficient operation.
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