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.
Low Voltage Switchgear
The Low Voltage Switchgear is a high-performance electrical distribution and protection system designed for safe, reliable, and efficient low-voltage power management in industrial facilities, commercial buildings, utility substations, renewable energy systems, and infrastructure projects. The switchgear integrates circuit breakers, protection relays, busbar systems, metering devices, and intelligent control components into a modular enclosure structure to provide stable electrical distribution and advanced operational safety. Manufactured using precision-engineered components and high-quality insulation materials, the low voltage switchgear ensures excellent electrical performance, thermal stability, and mechanical durability under demanding operating conditions. The modular cabinet design improves installation flexibility, simplifies maintenance procedures, and supports future expansion requirements while minimizing operational downtime. The Low Voltage Switchgear supports multiple distribution architectures, intelligent monitoring systems, and smart-grid communication protocols for modern energy management applications. With customizable configurations and scalable electrical protection functions, the system delivers dependable power distribution performance for industrial automation systems, commercial electrical networks, data centers, transportation infrastructure, and utility power systems.
Medium Voltage Switchgear
The Medium Voltage Switchgear is an advanced electrical distribution and protection system engineered for safe, reliable, and efficient medium-voltage power management in utility substations, industrial facilities, renewable energy plants, commercial infrastructure, and smart-grid applications. The system integrates vacuum circuit breakers, disconnect switches, protection relays, busbar assemblies, intelligent monitoring systems, and automation devices into a compact modular enclosure structure to ensure stable electrical distribution and enhanced operational safety. Designed with high-strength insulated structures and precision-manufactured electrical components, the medium voltage switchgear provides outstanding dielectric performance, thermal stability, and mechanical durability under demanding operating conditions. Its modular cabinet configuration improves installation flexibility, simplifies maintenance procedures, and supports future power distribution expansion while minimizing operational downtime and maintenance costs. The Medium Voltage Switchgear supports air-insulated and gas-insulated configurations, intelligent automation systems, remote communication protocols, and smart-grid integration technologies. With customizable protection schemes and scalable electrical distribution capabilities, the switchgear delivers dependable medium-voltage control and protection performance for industrial automation systems, utility power networks, renewable energy integration projects, transportation infrastructure, and mission-critical electrical facilities.
Armored Removable AC Switchgear
The Armored Removable AC Switchgear is a high-performance medium-voltage electrical distribution system specifically engineered for industrial power networks, utility substations, commercial infrastructure, and smart-grid applications. The switchgear adopts a metal-clad armored structure combined with a removable withdrawable unit design, integrating vacuum circuit breakers, protection relays, busbar systems, metering devices, and intelligent control components into a compact modular cabinet configuration. This advanced structure significantly improves operational safety, maintenance efficiency, and system reliability for modern electrical distribution environments. Designed according to international medium-voltage distribution standards, the armored removable AC switchgear provides excellent insulation performance, internal arc resistance, and mechanical durability under demanding operating conditions. The withdrawable breaker mechanism allows convenient maintenance and rapid replacement while reducing operational downtime and improving personnel safety during inspection procedures. The compartmentalized enclosure design effectively isolates busbar sections, cable chambers, breaker compartments, and control circuits to minimize fault propagation risks and enhance overall system protection. The Armored Removable AC Switchgear supports intelligent monitoring systems, remote communication protocols, and automated protection functions for modern digital substations and smart-grid infrastructure. With flexible configuration capabilities and scalable electrical distribution architecture, the system delivers dependable medium-voltage switching and protection performance for industrial automation systems, renewable energy projects, utility power networks, transportation infrastructure, and mission-critical electrical facilities.
Armored Metal Enclosed Switchgear
The Armored Metal Enclosed Switchgear is a high-performance medium-voltage electrical distribution and protection system designed for industrial power networks, utility substations, renewable energy facilities, transportation infrastructure, and smart-grid applications. The switchgear adopts a fully compartmentalized armored metal enclosure structure integrating vacuum circuit breakers, disconnect switches, protection relays, current transformers, voltage transformers, and intelligent control systems into a compact modular cabinet assembly. This design significantly improves operational safety, electrical reliability, and maintenance efficiency for modern medium-voltage power distribution systems. Manufactured using precision-engineered insulated structures and reinforced metal-clad compartments, the armored metal enclosed switchgear provides outstanding dielectric strength, internal arc resistance, and mechanical durability under demanding operating conditions. Independent compartments for busbars, breaker units, cable chambers, and low-voltage control sections effectively isolate electrical faults and minimize fault propagation risks while improving maintenance accessibility and operational security. The Armored Metal Enclosed Switchgear supports intelligent automation systems, remote monitoring interfaces, and advanced communication protocols for digital substations and smart-grid infrastructure. With scalable configuration capabilities and flexible protection architectures, the switchgear delivers stable medium-voltage switching, fault isolation, and electrical distribution performance for industrial automation systems, utility networks, renewable energy integration projects, and mission-critical electrical facilities.
Indoor Box-Type Fixed Metal-Enclosed Switchgear
The Indoor Box-Type Fixed Metal-Enclosed Switchgear is a high-performance medium-voltage electrical distribution and protection system specifically engineered for industrial facilities, utility substations, commercial infrastructure, renewable energy projects, and intelligent power distribution networks. The switchgear adopts a fully enclosed metal-clad structure integrating vacuum circuit breakers, disconnect switches, protection relays, current transformers, voltage transformers, and intelligent control systems within a compact fixed cabinet configuration. This design provides reliable medium-voltage power distribution while significantly improving operational safety and equipment stability. Designed according to international medium-voltage distribution standards, the indoor box-type switchgear delivers outstanding insulation performance, mechanical durability, and thermal stability under continuous operating conditions. The compartmentalized cabinet structure effectively separates busbar chambers, breaker compartments, cable chambers, and low-voltage control sections to reduce electrical fault propagation risks and simplify maintenance procedures. The fixed structure design improves installation stability and ensures dependable long-term operational performance for mission-critical electrical systems. The Indoor Box-Type Fixed Metal-Enclosed Switchgear supports intelligent monitoring systems, digital protection devices, remote communication interfaces, and smart-grid automation technologies for modern electrical distribution environments. With flexible configuration capabilities and scalable electrical protection architectures, the switchgear provides stable medium-voltage switching, fault isolation, and electrical control performance for industrial automation systems, utility networks, transportation infrastructure, and commercial power systems.
High Voltage Solid State Soft Start Cabinet
The High Voltage Solid State Soft Start Cabinet is an advanced motor control and protection system specifically engineered for medium and high-voltage industrial motors operating in demanding applications such as mining, petrochemical processing, power generation, water treatment, metallurgy, cement production, and large-scale manufacturing facilities. The cabinet utilizes high-performance thyristor solid-state control technology to provide smooth motor acceleration, reduce inrush current, minimize mechanical stress, and improve overall power system stability during motor startup operations. Designed with intelligent digital control architecture and precision-engineered power modules, the high voltage soft start cabinet significantly reduces voltage fluctuations, mechanical shock, and thermal stress commonly associated with direct-on-line motor starting methods. The system effectively extends motor service life, reduces maintenance requirements, and improves operational reliability for high-capacity pumps, compressors, conveyors, crushers, fans, and industrial processing equipment. Its modular cabinet structure simplifies installation, maintenance access, and future system expansion while ensuring safe and stable long-term operation. The High Voltage Solid State Soft Start Cabinet supports intelligent monitoring systems, programmable control logic, remote communication interfaces, and comprehensive protection functions for modern industrial automation environments.
Low Voltage Withdrawable Switch Cabinet
The Low Voltage Withdrawable Switch Cabinet is a state-of-the-art power distribution solution designed for safe, flexible, and efficient low-voltage electrical systems. Featuring modular withdrawable drawers (functional units), it allows quick extraction and insertion of circuit breakers, contactors, and other components without interrupting power to the entire system. This design significantly reduces downtime during maintenance, enhances operational safety, and supports high-reliability applications in modern industrial and commercial facilities. Built with robust compartmentalized construction, high-quality busbar systems, and advanced safety interlocks, the cabinet ensures excellent short-circuit withstand capability, thermal performance, and protection against arc faults. It integrates seamlessly with intelligent monitoring systems for real-time data on current, voltage, power quality, and predictive maintenance. Ideal for motor control centers (MCC) and power control centers (PC), this withdrawable switchgear optimizes space utilization while delivering superior flexibility for future expansions or modifications.
Low Voltage Distribution Cabinet
The Low Voltage Distribution Cabinet is an essential power management solution engineered for safe, reliable, and efficient electricity distribution in low-voltage systems. Designed for both indoor and outdoor applications, it organizes and protects electrical circuits while providing flexible feeder management for lighting, power outlets, motors, and auxiliary equipment. With robust construction and intelligent design, this cabinet minimizes energy losses, enhances system safety, and supports easy expansion in commercial, industrial, and infrastructure projects. Featuring high-performance circuit breakers, precision busbar systems, and comprehensive protection devices, the cabinet delivers superior short-circuit resistance, overload protection, and leakage prevention. Its modular layout allows for quick configuration changes and maintenance. Advanced options include digital metering, remote monitoring, and automatic transfer capabilities, making it ideal for modern smart grid integration. This distribution cabinet ensures stable power supply, reduces operational risks, and complies with the latest international electrical standards.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
UL Laboratory Certificate
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
-
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.
Welcome your inquiry
Honesty, Integrity, Frugality, Activeness and Passion