Pad Mount Transformer
Pad-mounted transformers are the standard solution for underground distribution networks in residential subdivisions, commercial developments, and industrial parks where overhead lines are impractical or prohibited. Enclosed in tamper-resistant, weatherproof cabinets and mounted on concrete pads at ground level, these units provide safe, accessible, and aesthetically acceptable power distribution without the visual impact of pole-mounted equipment. Sinotech prefabricated box transformer include:
Single-phase American Pad Transformer: Compact, integrated, reliable residential power supply
Three-phase American Pad Transformer: Loop & radial feed for urban grid distribution
European Prefabricated Substation: Independent compartment, safe and easy maintenance
Chinese Compact Box Transformer: High protection, intelligent for new energy projects
Custom Pad Mount Transformer Manufacturer in China
Sinotech supplies pad-mounted transformers covering 75kVA to 5,000kVA with primary voltages from 4.16kV to 35kV and standard secondary outputs including 120/240V single-phase, 208Y/120V, 480Y/277V, and 600Y/347V three-phase configurations. Both live-front and dead-front designs are available to match local utility safety standards and maintenance protocols.
Primary Voltage
4.16kV to 35kV
Capacity
75kVA to 5,000kVA
Standards
ANSI/IEEE/DOE/CSA/AS
What Are the Standard Size of Sinotech Pad Mount Transformer?
| Rated Power(KVA) | High Voltage(V) | Low Voltage(V) | Loss(W) | |
| No-load Loss(W) | On-load Loss(W) | |||
| 75 kva Transformer | 34500/ 19920 13800/ 7957 13200/ 7620 12470/ or others | 240 480 480Y/ 277 600Y 347 | 180 | 1250 |
| 112.5 kva Transformer | 200 | 1500 | ||
| 150 kva Transformer | 280 | 2200 | ||
| 225 kva Transformer | 400 | 3050 | ||
| 300 kva Transformer | 480 | 3650 | ||
| 500 kva Transformer | 680 | 5100 | ||
| 750 kva Transformer | 980 | 7500 | ||
| 1000 kva Transformer | 1150 | 10300 | ||
| 1500 kva Transformer | 1640 | 14500 | ||
| 2000 kva Transformer | 2160 | 20645 | ||
| 2500 kva Transformer | 2680 | 27786 | ||
Note: Above Is Technical Parameters of American Type Pad Mount Transformer
Custom Pad Mount Transformer Solutions
Designed for secure, outdoor, ground-level installations, our customized pad-mounted transformers feature tamper-resistant, heavy-duty enclosures that guarantee public safety and protect internal components from unauthorized access. Utilizing advanced anti-corrosion coatings, sealed tank construction, and superior insulation systems, these units deliver long-lasting durability and minimal maintenance, even in the harshest global climates or high-humidity regions.
Voltage and ratio customization at Sinotech means primary inputs from 4.16kV to 35kV with secondary outputs from 120V to 4.16kV in any standard or non-standard combination. Dual-ratio primary configurations are available for networks requiring tap switching between two voltage classes. Custom tap ranges beyond the standard ±10% are engineered with verified thermal and dielectric performance.
Our Global Projects
Pad Mount Transformer in Sri Lanka
Pad Mount Transformer to Thailand
Pad Mount Transformer to Morocco
Pad Mount Transformer to Panama
Pad Mount Transformer to Papua New Guinea
Pad Mount Transformer to Tunisia
Pad Mount Transformer Application
Pad-mounted transformers serve underground distribution in residential housing estates where aesthetic requirements prohibit overhead lines, shopping malls and retail centers requiring reliable power with minimal visual impact, office parks and campuses with underground utility infrastructure, industrial developments where overhead clearances are restricted, and urban renewal projects converting overhead distribution to underground systems.
Residential Subdivisions and Housing Estates
Commercial and Retail Developments
Wind and Solar Farm Grid Integration Transmission
High Quality, Reliable, and Long lasting Box Substation
Over years of supplying pad-mounted transformers for international projects, Sinotech engineers have worked through hundreds of non-standard requirements that never appear in the catalog. Every unit is tested to IEEE C57.12.00 or IEC 60076 standards before shipment with actual measured values on the test report, not calculated estimates.
30+ Years of Industry Expertise
With over 30 years of combined experience in power electrical engineering, Sinotech brings unmatched technical depth to every project. Our team understands the complexities of different voltage levels, load profiles, and environmental conditions.
Large Manufacturing Capability
Sinotech operates a world-class manufacturing base capable of handling both small custom orders and large-volume utility projects. Our scale ensures consistent quality, competitive pricing, and reliable delivery for clients worldwide.
Comprehensive Product Portfolio
Sinotech offers a complete range of power transformation products, eliminating the need for multiple suppliers. From distribution transformers to prefabricated substations, we cover your entire power infrastructure requirements.
Full Customization Capability
Sinotech engineers custom transformer solutions for high-altitude zones, extreme temperatures, corrosive atmospheres, and renewable energy applications with documented project success.
IEC, ANSI, and CE Certified Quality
Every Sinotech transformer meets stringent international standards. We provide full test reports and certification documentation with each shipment, ensuring regulatory compliance in your target market.
Rigorous Quality Control Process
Quality is built into every step of our manufacturing process. From silicon steel core selection to vacuum oil filling, Sinotech maintains strict controls to guarantee performance, safety, and long service life.
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OEM Pad Mount Transformer Supplier
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Sinotech welcomes inquiries from distributors, brand owners, and EPC contractors seeking a reliable power transformer manufacturer.
Commercial Shopping Center — Saudi Arabia
“We required 14 pad mount transformers with loop-feed configurations for the underground network. The utility demanded dead-front design with load-break elbows — not all suppliers could meet the specification. Sinotech delivered units that passed utility inspection on first submission, which never happens with international suppliers. Installation was straightforward and the loop-feed system has been operating reliably through two summer seasons.”
Global Clients
