Transformers
Three Phase Pad Mounted Transformer
NPC Three-phase pad-mounted transformers, for use on underground power distribution systems, are best suited for commercial applications in public access areas and where underground service is required. These transformers meet modern design requirements for flexibility and provide a visually pleasing installation. Construction allows installation in locations accessible to the general public without the need for protective fencing or vaults. These units are ideally suited for apartment buildings, schools, hospitals, shopping centers, commercial buildings, or industrial sites. Standard, liquid-filled sizes range from 45–7500 kVA, with primary ratings from 2.4–34.5 kV.
800kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC's 800kVA three phase pad mounted transformer provides exceptional power handling for high-demand medium-voltage applications, ensuring stable and efficient distribution in outdoor settings. Built with safety and longevity in mind, this pad-mounted unit features three-point door latching, automatic pressure relief, liquid level/pressure/vacuum gauges, high BIL ratings (up to 150kV for surge protection), and a tamper-resistant structure suitable for public access areas. Its compact, low-profile footprint facilitates easy installation on concrete pads in constrained urban or industrial sites, while advanced enclosure integrity meets IEEE C57.12.28 requirements.
1250kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC's 1250kVA Three Phase Pad Mounted Transformer is a high-performance, oil-immersed distribution transformer engineered for reliable underground power distribution in demanding environments. It delivers exceptional efficiency (up to 99.2% or higher), low no-load and load losses, and a 65°C average winding rise for extended service life exceeding 30-40 years. Key components include high-grade silicon steel core, aluminum or copper windings, 5-position tap changer (±2x2.5%), pressure relief valve, oil level gauge, and tamper-resistant enclosure in Munsell green finish.
1600kVA Three Phase Pad Mounted Transformer
The 1600kVA Three Phase Pad Mounted Transformer is a robust, liquid-immersed, self-cooled distribution transformer designed for reliable underground power delivery in high-demand environments. Built to exceed IEEE C57.12.34, ANSI C57.12.00, DOE 2016 efficiency standards, and CSA C802.3 requirements, this UL-listed compartmental-type unit features dead-front high-voltage bushings (200A loadbreak inserts), loop-feed or radial configurations, and a fully sealed tank with mineral oil or eco-friendly FR3 fluid options.Suitable for primary voltages like 12.47kV, 13.8kV, 24.94kV, or 34.5kV to secondary 480Y/277V or 208Y/120V, it provides overload capability, low maintenance, and enhanced fire safety for modern grid integration.
3750kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC's 3750kVA Three Phase Pad Mounted Transformer is a heavy-duty, oil-immersed compartmental-type distribution transformer engineered for high-capacity underground power distribution in large-scale utility and industrial settings. This high-power pad-mounted transformer reduces energy consumption, lowers total ownership costs through superior efficiency and longevity (30+ years), and supports demanding loads with features like vacuum fault interrupters and harmonic mitigation, ideal for reliable, secure power in expansive commercial-industrial networks.
250kVA Three Phase Pad Mounted Transformer
The 250kVA Three Phase Pad Mounted Transformer is a compact, liquid-immersed, self-cooled (ONAN) distribution transformer optimized for efficient, underground power delivery in residential, light commercial, and small industrial applications. Fully compliant with IEEE C57.12.34, ANSI C57.12.00, DOE 2016 efficiency standards, and UL-listed, this compartmental-type unit features dead-front 200A high-voltage bushing wells (loadbreak inserts), radial or loop feed options, and a sealed tank using non-PCB mineral oil or FR3 natural ester fluid for improved fire safety and environmental performance.
2MVA Solar Step-Up Pad Mounted Transformer for Solar PV
The 2MVA Solar Step-Up Pad Mounted Transformer is a purpose-built, three-phase, oil-immersed (ONAN) inverter step-up (ISU) transformer designed specifically for utility-scale solar PV farms, boosting low-voltage inverter AC outputs (typically 600V, 690V, 800V, or 480V) to medium-voltage collection levels (e.g., 12.47kV, 13.8kV, 22kV, 24.94kV, 33kV, or 34.5kV) for efficient grid tie-in. Engineered to IEEE C57.159 (DPV guide), IEEE C57.12.34 (pad-mounted compartmental-type), IEEE C57.12.00, DOE 2016 efficiency, and ANSI standards, this UL-listed unit features electrostatic shielding between windings to mitigate inverter harmonics and DC bias, K-factor up to K-19 for nonlinear loads, and reduced flux density to prevent core saturation from potential DC components.In-Depth Analysis
Three Phase Pad Mounted 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
98%
Environmental Adaptability Analysis
Three Phase Pad Mounted 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 3-phase pad-mounted transformers are trusted worldwide for efficiency, safety, and reliability.
Secure & Safe Power for Public Areas
Our Three Phase Pad Mounted Transformers prioritize secure and safe power delivery, making them an ideal choice for commercial zones, industrial parks, and large residential developments. Encased in robust, tamper-resistant enclosures, these units are designed to prevent unauthorized access and protect against accidental contact, significantly mitigating electrical hazards in publicly accessible areas. This fully enclosed design also shields internal components from environmental damage and vandalism, ensuring uninterrupted and reliable operation. By choosing our safe pad-mounted transformers, you provide a protected underground power distribution solution that champions public safety and reduces liability across your utility network.
Minimal Visual Impact & Space Efficiency
Integrate high-capacity three-phase power seamlessly into urban and suburban landscapes with the minimal visual impact and space efficiency of our Three Phase Pad Mounted Transformers. Unlike bulky substation equipment or towering overhead structures, these low-profile, ground-level units are designed for aesthetic integration, blending discreetly with the surrounding environment. This makes them a preferred solution for developments where visual aesthetics and property value are paramount. Choosing our discreet pad-mounted transformers optimizes land use and enhances the overall appeal of your project, providing underground electrical infrastructure that is both powerful and visually harmonious.
Robust & Reliable Three-Phase Performance
Our Three Phase Pad Mounted Transformers are engineered for robust and reliable three-phase performance, crucial for powering demanding commercial, industrial, and large residential loads. Featuring highly efficient oil-filled or dry-type cores, these units deliver precise voltage regulation and exceptional overload capabilities, ensuring a stable and high-quality power supply. Their durable construction guarantees long-term operational stability, minimizing downtime and maximizing productivity for your clients. By deploying our high-performance three-phase transformers, you underpin critical operations with consistent, dependable power, forming the resilient backbone of any modern electrical distribution system.
Simplified Installation & Lower Maintenance
Opting for our Three Phase Pad Mounted Transformers simplifies installation and contributes to lower long-term maintenance costs. As self-contained units delivered ready for ground-level placement, they streamline the setup process, reducing labor and specialized equipment needs compared to complex substation builds. Their enclosed design inherently protects internal components from weather and external damage, minimizing potential faults and emergency repairs. Easy access for routine inspections and maintenance further enhances their cost-effectiveness, making them a practical and economical choice for efficiently managing your underground power infrastructure with reduced operational overhead.
Product Show
Explore the detailed design and practical application scenarios of three phase pad mounted transformers
Three Phase Transformer Testing
Three Phase Pad Mounted Transformer Testing
3 Phase Pad Mounted Transformer
Three Phase Transformer Internal Structure
500kVA 3-phase Transformer
500kVA 3-phase Pad Mounted Transformer
4 Position Load Break Switch
Transformer 4 Position Load Break Switch
75kVA Three Phase Transformer
75kVA High Volgate Step Up Transformer
Transformer Load Breaker Insert
High voltage elbow cable connector
3 Phase Transformer Installation
3 Phase Transformer On-site Assembly
45kVA 3 Phase Step Down Transformer
45 kVA - 34.5/0.48/0.277 kV 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
Pad Mounted 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 Residential Area
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Dominican
Model：75kVA & 45kvA 3 Phase Pad Mounted Transformer x 10
Venezuela Factory
Completed3-phase pad-mounted transformers provide safe, efficient, and reliable power distribution in Dominican .
Country：Venezuela
Model：500kVA Three Phase Pad Mounted Transformer x 7
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
-
What is a 3 phase pad mounted transformer and how does it work?
A 3-phase pad-mounted transformer is a ground-mounted distribution unit that converts medium-voltage electricity into lower voltages for end use. Unlike single-phase models, a three-phase pad-mounted transformer provides balanced three-phase power, making it essential for large commercial and industrial applications where a stable and efficient energy supply is required. -
What are the common applications of a three phase pad mounted transformer?
A three-phase pad-mounted transformer is widely used in industrial plants, commercial complexes, and utility networks. It supports heavy machinery, motors, and large-scale equipment that require consistent three-phase power. Compared with single-phase units, the 3-phase transformer is designed for high-demand environments where reliability and performance are critical. -
How do I choose the right size for a 3 phase pad mounted transformer?
Selecting the proper size of a 3-phase pad-mounted transformer depends on your load requirements, voltage levels, and installation environment. Considering pad-mounted transformer sizes ensures that your system runs efficiently without overloading. Choosing the right capacity helps reduce energy loss, improve system stability, and extend the lifespan of your power equipment. -
What are the advantages of using a 3 phase transformer over a single phase transformer?
A 3-phase transformer provides greater efficiency, balanced power delivery, and higher capacity compared to a single-phase transformer. In distribution networks, the three-phase pad-mounted transformer supports larger loads, reduces energy losses, and ensures stable voltage. This makes it the preferred option for industries, commercial facilities, and utility providers. -
Are three phase pad mounted transformers suitable for industrial power distribution?
Yes, three-phase pad-mounted transformers are ideal for industrial applications. As a type of industrial transformer, they provide the high capacity and reliable performance required for factories, manufacturing plants, and large facilities. By delivering balanced three-phase power, a 3-phase pad-mounted transformer ensures smooth operation of heavy-duty equipment and reduces downtime.
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