Transformers
Transformer Equipments
Our comprehensive range includes transformer bushings, Buchholz relays, dehydrating breathers, pressure relief valves, oil level gauges, temperature indicators, and other essential transformer components.
Whether you need solutions for oil-immersed transformers or dry-type transformers, we provide durable, standards-compliant equipments that ensure safety, efficiency, and long service life. All products are manufactured to international quality standards and widely used in power plants, renewable energy projects, industrial facilities, and electrical networks.
Explore our full collection of transformer spare parts and maintenance accessories to optimize performance and minimize downtime. Trusted by engineers and procurement professionals worldwide for superior quality and competitive pricing.
Drive Isolation Transformer
The Drive Isolation Transformer is a specialized transformer engineered to provide electrical isolation, voltage transformation, harmonic mitigation, and enhanced power quality for variable frequency drives (VFDs), motor control systems, and industrial automation applications. Installed between the utility power source and drive equipment, the transformer protects sensitive drive electronics from electrical disturbances while reducing the impact of harmonics generated by inverter-based systems. This improves system reliability, extends equipment lifespan, and enhances operational stability in demanding industrial environments. Manufactured using premium-grade silicon steel cores, high-conductivity windings, and advanced insulation systems, the drive isolation transformer delivers exceptional efficiency, thermal performance, and voltage regulation. The transformer effectively isolates common-mode noise, suppresses transient voltage spikes, reduces grounding issues, and minimizes electromagnetic interference within industrial electrical networks. The Drive Isolation Transformer supports both low-voltage and medium-voltage drive systems and can be customized for harmonic reduction, phase shifting, multi-pulse drive configurations, and renewable energy applications. Its rugged construction and intelligent monitoring capabilities make it an ideal solution for modern industrial power systems requiring reliable motor control and superior electrical protection.
Dry Type Isolation Transformer
The Dry Type Isolation Transformer is a highly reliable power conditioning and electrical isolation solution designed to provide complete galvanic separation between input and output circuits. By eliminating direct electrical connections between the primary and secondary windings, the transformer effectively reduces electrical noise, suppresses transient disturbances, minimizes ground loop currents, and enhances system safety. Its oil-free design makes it particularly suitable for indoor installations where environmental protection, fire safety, and operational reliability are critical requirements. Manufactured using high-grade silicon steel cores, advanced vacuum pressure impregnated (VPI) insulation technology, and precision-wound copper or aluminum conductors, the Dry Type Isolation Transformer delivers superior voltage regulation, thermal stability, and dielectric performance. The transformer is widely utilized in industrial automation systems, medical facilities, commercial buildings, telecommunications infrastructure, data centers, renewable energy installations, and sensitive electronic equipment applications. Its maintenance-friendly design and robust construction ensure long service life and dependable performance under demanding operating conditions.
Single Phase Isolation Transformer
The Single Phase Isolation Transformer is a specialized power transformer designed to provide complete electrical isolation between the primary and secondary circuits while ensuring safe and efficient power transmission. By eliminating direct conductive paths between input and output power sources, the transformer effectively suppresses electrical noise, reduces common-mode interference, minimizes transient voltage disturbances, and enhances operational safety for connected equipment. This makes it an ideal solution for sensitive electronic devices, industrial control systems, laboratory instruments, medical equipment, and commercial power applications. Constructed with premium-grade CRGO silicon steel cores and precision-wound copper or aluminum conductors, the Single Phase Isolation Transformer offers exceptional efficiency, low losses, and stable voltage regulation. Its robust insulation system enhances dielectric strength and provides reliable protection against electrical faults and grounding issues. The transformer is available in a wide range of voltage ratings and capacities, making it suitable for both standard and customized electrical distribution requirements. Designed for long-term performance and minimal maintenance, the Single Phase Isolation Transformer can be integrated into industrial automation systems, telecommunications networks, data processing facilities, and specialized power conditioning applications.
Three Phase Isolation Transformer
The Three Phase Isolation Transformer is a premium electrical power solution designed to provide complete galvanic isolation between the primary and secondary circuits of three-phase power systems. By eliminating direct electrical continuity between power sources and connected loads, the transformer effectively reduces electrical noise, suppresses common-mode disturbances, minimizes transient voltage surges, and improves overall power quality. This advanced isolation capability helps protect sensitive equipment, enhance operational safety, and improve system reliability in demanding industrial and commercial environments. Manufactured using high-permeability CRGO silicon steel cores and precision-engineered copper or aluminum windings, the Three Phase Isolation Transformer delivers excellent efficiency, low losses, and stable voltage regulation. Its robust insulation system ensures superior dielectric performance while reducing the risk of electrical faults and ground loop issues. The transformer is widely deployed in industrial automation facilities, manufacturing plants, renewable energy installations, data centers, transportation infrastructure, healthcare facilities, and critical power applications where reliable and clean power is essential.
3kVA Isolation Transformer
The 3kVA Isolation Transformer is a compact and highly efficient power isolation solution engineered to provide safe and stable electrical power for sensitive equipment and critical electrical systems. By creating complete galvanic separation between the incoming and outgoing circuits, the transformer effectively eliminates electrical interference, suppresses common-mode noise, reduces transient voltage spikes, and improves overall power quality. This protective design helps prevent equipment damage caused by grounding issues, electrical disturbances, and power fluctuations. Built with premium silicon steel cores and high-conductivity copper windings, the 3kVA Isolation Transformer offers excellent voltage regulation, low operating losses, and long-term reliability. Its compact footprint makes it suitable for installations where space is limited while maintaining superior electrical performance. The transformer is widely used in industrial control panels, laboratory instruments, medical devices, testing equipment, telecommunications systems, security systems, and commercial electrical installations requiring enhanced electrical safety and power conditioning. The transformer can be supplied with customized voltage combinations, enclosure designs, monitoring functions, and protection features to satisfy a wide range of application requirements. With its robust construction and maintenance-friendly design, the 3kVA Isolation Transformer provides dependable performance for demanding power distribution and equipment protection applications.
10kVA Isolation Transformer - 120V to 240V
The 10kVA Isolation Transformer – 120V to 240V is specifically engineered to provide safe voltage conversion and complete electrical isolation for critical power applications. Designed to convert a 120V input supply into a stable 240V output while maintaining galvanic separation between the primary and secondary circuits, this transformer significantly improves power quality, reduces electrical noise, and protects connected equipment from voltage disturbances, ground loops, and transient surges. Featuring a high-efficiency silicon steel core and precision-engineered copper windings, the transformer delivers stable output voltage, low operating losses, and exceptional thermal performance. The isolation design effectively suppresses electromagnetic interference (EMI) and common-mode noise, making it particularly suitable for sensitive equipment such as industrial controllers, laboratory instruments, communication systems, medical equipment, and testing devices. The robust construction ensures reliable operation under continuous load conditions while minimizing maintenance requirements. The 10kVA Isolation Transformer is available in both open-frame and enclosed configurations, offering installation flexibility across industrial facilities, commercial buildings, telecom infrastructure, manufacturing plants, and specialized power distribution systems. Its durable design, high efficiency, and superior safety performance make it a dependable solution for voltage conversion and electrical isolation applications.In-Depth Analysis
NPC Electric transformers equipments 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
+15%
Reduced Iron Loss
-28%
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 equipments have been rigorously tested and can operate stably under various harsh environmental conditions.
Temperature Range
-40℃ ~ +75℃
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.
Superior Quality & International Standards
We are committed to delivering only the highest quality Transformer Equipments. All our products, including HV bushings, prefabricated transformers, HV switchgear, and voltage regulators, are manufactured under strict ISO 9001 quality management systems and fully comply with IEC, ANSI, and GB international standards. Each component undergoes rigorous testing such as power frequency withstand, partial discharge, and thermal stability tests before leaving the factory. With over 15 years of industry experience, we use premium materials like high-grade porcelain, epoxy resin, and corrosion-resistant alloys to ensure long service life and exceptional performance even in harsh environments. Choosing us means choosing safety, reliability, and peace of mind for your power projects.
One-Stop Comprehensive Solutions
We offer a complete range of Transformer Equipments and accessories under one roof. From HV bushings, Buchholz relays, and dehydrating breathers to full prefabricated transformers, HV switchgear, and voltage regulators, we provide integrated solutions for both new installations and maintenance projects. This one-stop service saves you time and cost while ensuring perfect compatibility between all components. Whether you need equipment for substations, renewable energy plants, industrial facilities, or urban power distribution, our professional team can deliver tailored packages that meet your exact technical specifications and project requirements.
Professional Technical Support & Customization
Our experienced engineering team provides full technical support throughout your project lifecycle. We offer product selection guidance, technical drawings, on-site installation support, and customized solutions according to your specific voltage, capacity, and environmental requirements. With advanced design software and a strong R&D capability, we can quickly develop special specifications for HV bushings, prefabricated transformers, and HV switchgear to meet unique project demands. Our experts are always ready to help you solve complex technical challenges in power transmission and distribution systems.
Reliable After-Sales Service
We stand behind every product we supply. Our professional after-sales team offers comprehensive warranty, rapid spare parts delivery, remote technical diagnosis, and on-site maintenance support. With a global service network and sufficient stock of common Transformer Equipments such as HV bushings and voltage regulators, we ensure minimal downtime for your operations. Many customers choose us repeatedly because of our responsive service, competitive pricing, and long-term partnership approach. We are not just a supplier — we are your trusted partner in power equipment.
Product Show
Explore the detailed design and practical application scenarios of NPC transformer equipment
Prefabricated Transformer
Prefabricated Transformer & Box Transformer
HV Bushings
Transformer Equipments - HV Bushings
LV, MV & MV Switchgear
High performance LV, MV & MV Switchgear
Electrical Transformer Coil
Electrical Transformer Coil For Power Transformer
Bushing Wells
Transformer Equipments - Bushings Well
Load Break Switcher
Transformer Equipments - Load Break Switcher
Voltage Regulator
Transformer Equipments - Single Voltage Regulator
Step Voltage Regulator
Transformer Equipments - Step Voltage Regulator
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
Solar Calbe- QA TECHNIC
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 are Transformer Equipments?
Transformer Equipments refer to a wide range of accessories and components used for power transformers, including HV bushings, Buchholz relays, dehydrating breathers, temperature indicators, and oil level gauges. These essential parts ensure safe, efficient, and reliable operation of oil-immersed and dry-type transformers. -
What is an HV Bushing and why is it important?
HV Bushing (High Voltage Bushing) is a critical insulator that allows high-voltage conductors to pass through the transformer tank while maintaining electrical insulation. It prevents flashover and ensures safe power transmission. We offer premium porcelain and composite HV bushings up to 110kV. -
What is a Prefabricated Transformer?
A Prefabricated Transformer (also known as package substation or compact substation) is a factory-assembled unit that integrates transformer, HV switchgear, LV switchgear, and protection devices into one enclosure. It is widely used in urban power distribution, industrial parks, and renewable energy projects due to its compact size and fast installation. -
Do you supply HV Switchgear for transformers?
Yes. We provide HV Switchgear including SF6 gas insulated switchgear, vacuum circuit breakers, disconnectors, and load break switches. These are fully compatible with our transformers and prefabricated substations, meeting IEC standards for reliable power control and protection. -
What does a Voltage Regulator do in a transformer system?
A Voltage Regulator automatically maintains stable output voltage despite fluctuations in input voltage or load. It is commonly used with power transformers in areas with unstable grids, ensuring consistent voltage for sensitive equipment and improving overall system efficiency. -
What other Transformer Equipments do you offer?
In addition to HV bushings, HV switchgear, prefabricated transformers and voltage regulators, we also supply Buchholz relays, pressure relief valves, dehydrating breathers, magnetic oil level gauges, winding temperature indicators, and complete sets of transformer spare parts.
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