Transformers
Pad Mounted Transformer
Ensure secure and aesthetically pleasing power distribution with Pad Mounted Transformers. Designed for safe, reliable operation in underground residential, commercial, and light industrial applications, these transformers are a discreet alternative to pole-mounted units. Our Pad Mounted Transformers feature robust, tamper-resistant enclosures, typically in single-phase or three-phase configurations, housing efficient oil-filled cores. They offer superior safety, reduced visual impact, and excellent overload capability, ensuring stable voltage regulation and minimal energy loss. Trust our compliant and durable pad-mounted solutions for dependable, hidden power infrastructure in modern communities.
630kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC's 630kVA three phase pad mounted transformer is engineered for demanding medium-voltage distribution needs, delivering superior efficiency and durability in outdoor installations. Compliant with the latest DOE efficiency standards, ANSI C57.12.34, IEEE requirements, and UL listings, this compartmentalized unit features a robust steel enclosure with corrosion-resistant coating, high-voltage dead-front or live-front bushings, radial or loop feed setups, and a standard 65°C winding rise for excellent thermal management. Primary voltages span from 4160V to 34500V (including popular grounded wye options like 12470GrdY/7200V or 13800GrdY/7970V), while secondary voltages cover 208Y/120V, 480Y/277V, or custom low-voltage configurations up to 600V.
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
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
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 pad mounted transformers — from single phase to three phase solutions — are trusted worldwide for efficiency, safety, and reliability.
Pad Mounted Transformers Manufacturer
We provide a comprehensive selection of pad mounted transformers, including both single phase pad mounted transformers and three phase pad mounted transformers, designed to meet the power needs of residential, commercial, and industrial users.
Our single phase units are perfect for small communities and light-load distribution, while our 3 phase transformers ensure efficient performance for larger, more demanding networks. Whether you need a compact solution for limited space or a high-capacity unit for industrial facilities, our diverse product line guarantees the right fit for your project. With flexible voltage ratings and sizes, we deliver reliable power wherever it’s needed.
Our single phase units are perfect for small communities and light-load distribution, while our 3 phase transformers ensure efficient performance for larger, more demanding networks. Whether you need a compact solution for limited space or a high-capacity unit for industrial facilities, our diverse product line guarantees the right fit for your project. With flexible voltage ratings and sizes, we deliver reliable power wherever it’s needed.
Pad Mounted Transformer Size Options
We offer pad mounted transformers in a wide range of sizes to match diverse project requirements. From compact single phase pad mounted transformers ideal for residential neighborhoods to large three phase pad mounted transformers designed for industrial and utility networks, every size ensures optimized performance.
Choosing the right size of a 3 phase transformer helps balance efficiency, cost, and space utilization. With standard and customizable options, our transformers deliver reliable power while fitting seamlessly into any installation environment.
Choosing the right size of a 3 phase transformer helps balance efficiency, cost, and space utilization. With standard and customizable options, our transformers deliver reliable power while fitting seamlessly into any installation environment.
Safe, Durable & Low Maintenance
Safety and durability are at the core of our pad mounted transformer design. Each unit is housed in a sealed, tamper-proof enclosure to protect against environmental conditions, vandalism, and accidental contact. Our single phase pad mounted transformers and three phase pad mounted transformers feature advanced insulation and cooling systems, ensuring smooth operation even under heavy loads.
With built-in protection mechanisms, every 3 phase transformer minimizes risks while extending service life. Thanks to their robust design, our transformers require minimal maintenance, helping customers save on costs and downtime. Invest in a solution that prioritizes safety, resilience, and long-term value.
With built-in protection mechanisms, every 3 phase transformer minimizes risks while extending service life. Thanks to their robust design, our transformers require minimal maintenance, helping customers save on costs and downtime. Invest in a solution that prioritizes safety, resilience, and long-term value.
Energy-Saving and Cost-Effective
Our pad mounted transformers are not only reliable but also highly energy-efficient, helping customers lower operational costs and reduce power losses. The single phase pad mounted transformer is designed for smaller loads, delivering consistent power with minimal energy waste, while the three phase pad mounted transformer ensures efficient power flow in large-scale commercial and industrial networks.
Every 3 phase transformer is optimized to maximize performance while keeping life-cycle costs low. With advanced design and eco-friendly features, our transformers provide long-term savings and support sustainable energy solutions for diverse applications.
Every 3 phase transformer is optimized to maximize performance while keeping life-cycle costs low. With advanced design and eco-friendly features, our transformers provide long-term savings and support sustainable energy solutions for diverse applications.
Product Show
Explore the detailed design and practical application scenarios of pad mounted transformers
Single Phase Pad Mounted Transformer
Single Phase Transformer Internal Structure
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
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
Mongolia Residential Area
CompletedEnsure the power safety of surrounding residents and meet daily work needs
Country：Mongolia
Model：75KV Single Phase Pad Mounted Transformer x 10
Venezuela Factory
Completed3-phase pad-mounted transformers provide safe, efficient, and reliable power distribution in Venezuela.
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
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What is a single phase pad mounted transformer and where is it commonly used?
A single phase pad mounted transformer is a compact distribution transformer typically used in residential areas and light commercial applications. It provides reliable voltage conversion for smaller loads, offering easy installation and safe operation. With its sealed enclosure and low maintenance design, it is ideal for neighborhoods, rural power systems, and facilities requiring efficient single phase power. -
What are the advantages of a three phase pad mounted transformer compared to a single phase unit?
A three phase pad mounted transformer delivers more efficient power distribution than a single phase unit, making it ideal for industrial plants, large commercial complexes, and utility networks. It provides balanced loads, higher capacity, and reduced energy losses. Compared to a single phase pad mounted transformer, the three phase transformer is better suited for demanding applications that require stable and continuous power supply. -
How does a three phase transformer improve efficiency in industrial applications?
A three phase transformer improves efficiency by delivering balanced power across three lines, reducing energy loss and improving system stability. In industrial applications, this ensures reliable operation of heavy machinery, motors, and equipment. By maintaining consistent voltage and supporting higher loads, a three phase pad mounted transformer minimizes downtime and enhances productivity, making it the preferred choice for large-scale power distribution. -
What are the standard pad mounted transformer sizes available?
Standard pad-mounted transformer sizes range from 15 kVA to 500 kVA for a single-phase pad-mounted transformer, and from 45 kVA up to several thousand kVA for a three-phase pad-mounted transformer. Choosing the right size depends on load capacity, installation site, and whether you need a 3-phase transformer for industrial use. -
Can I convert power from single phase to three phase using a transformer?
Yes, power can be converted from single phase to three phase with the help of specialized transformers or phase converters. While a single phase pad mounted transformer cannot directly create three phase power, certain systems, such as rotary or static converters, can enable this conversion. For industrial expansion, installing a three phase pad mounted transformer is often the most reliable long-term solution. -
How do I select the right pad mounted transformer size for my project?
Selecting the correct pad-mounted transformer size requires analyzing your load demand, voltage requirements, and future expansion needs. A single-phase pad-mounted transformer is best for residential or light commercial power, while a 3-phase transformer is recommended for industrial or high-capacity projects. Consulting with an expert ensures efficiency and cost-effectiveness.
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