PowerNex Distribution Transformers are high-reliability, oil-immersed electrical transformers designed for both medium-voltage to low-voltage step-down and low-to-medium voltage step-up applications. Supporting voltage classes from 3.3 kV to 33 kV and power ratings from 5 kVA to 5000 kVA, our single-phase and three-phase distribution transformers provide safe, stable, and efficient power conversion across utility grids, industrial facilities, infrastructure projects, and renewable energy systems.
Engineered in compliance with ANSI, IEEE, and IEC standards, PowerNex distribution transformers feature low-loss core design, robust oil-immersed insulation systems, and reliable ONAN cooling for long-term outdoor operation. In addition to traditional distribution step-down use, customized step-up distribution transformer configurations are available for grid interconnection, renewable energy collection systems, and special industrial voltage requirements. With manufacturer-direct customization, factory testing, and global export support, PowerNex delivers dependable distribution transformer solutions worldwide.
High-Reliability Oil-Immersed Solutions for Utility & Industrial Power ⚡
The PowerNex Difference: Robust MV & LV Oil-Immersed Power Delivery
Distribution Transformers are the essential link in modern electrical power systems, designed to step down Medium Voltage (MV) electricity to Low Voltage (LV) levels for safe, stable, and efficient end-user consumption.
At PowerNex, we specialize in high-performance Oil-Immersed Distribution Transformers and Power Distribution Transformers engineered for exceptional longevity, stable voltage regulation, and superior efficiency in demanding outdoor, utility, and industrial environments.
As a trusted Distribution Transformer Manufacturer and Supplier, PowerNex delivers globally compliant, rugged, and low-maintenance solutions for utility grids, industrial facilities, infrastructure projects, and energy systems worldwide.
1. Product Portfolio & Technical Ratings
Universal Application for Utility & Industrial Distribution
PowerNex offers a comprehensive portfolio of Oil-Immersed Electrical Distribution Transformers, designed for ground-mounted, platform-mounted, and utility network installations, fully compatible with global electrical standards.
1.1 Power Rating (kVA Range)
Our distribution transformer portfolio supports applications from residential loads to heavy industrial and utility substations:
| Category | kVA Range | Common Applications |
|---|---|---|
| Low Capacity | 5 kVA – 500 kVA | Residential distribution, small commercial loads, rural electrification (single-phase & three-phase) |
| Medium Capacity | 30 kVA – 2500 kVA | Utility feeder lines, commercial infrastructure, medium industrial plants |
| High Capacity | 3000 kVA – 5000 kVA | Primary utility substations, industrial power centers, infrastructure projects |
1.2 Voltage Classes (MV to LV Step-Down)
PowerNex MV distribution solutions integrate seamlessly into ANSI, IEEE, IEC, and mixed-standard grids.
Primary Voltage (MV):
3.3 kV, 6.6 kV, 10 kV, 11 kV, 13.8 kV, 22 kV, 33 kV
Secondary Voltage (LV):
120 / 240 V, 208Y / 120 V, 230 / 400 V, 277 / 480 V
Phase & Frequency:
Single Phase and Three Phase | 50 Hz / 60 Hz
2. Core Technology
Proven Oil-Immersed Reliability
PowerNex specializes in robust Oil-Immersed Distribution Transformers, utilizing liquid insulation to provide superior cooling performance, enhanced dielectric strength, and extended service life.
2.1 Insulating Fluid Options
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Mineral Oil:
Industry-standard insulating fluid with excellent heat dissipation and high dielectric strength. -
Biodegradable Fluids (Optional):
Natural or synthetic ester fluids available for projects requiring enhanced fire safety and reduced environmental impact.
2.2 Thermal Management
ONAN Cooling (Oil Natural Air Natural)
A proven and highly reliable cooling method where insulating oil circulates naturally to dissipate heat from the core and windings to the tank and radiators, ensuring continuous duty operation and high overload capability.
3. Advanced Engineering & Efficiency Benchmarks
PowerNex distribution transformers are designed for maximum efficiency, reduced operating losses, and long-term system reliability.
3.1 Efficiency-Focused Low-Loss Design
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Ultra-Low No-Load Losses:
Achieved through high-permeability CRGO silicon steel cores.
Optional Amorphous Metal Core designs are available for projects requiring maximum energy efficiency and compliance with stringent Tier 2 / Level 1 efficiency regulations. -
Optimized Winding Technology:
Copper or aluminum conductors with optimized current density reduce I²R losses and enhance short-circuit withstand capability.
3.2 Reliability-Oriented Construction
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Insulation System:
Proven oil-paper insulation system delivering high dielectric strength and excellent thermal stability for long-term outdoor operation. -
Tank Design:
Heavy-duty welded steel tanks with durable surface coatings to withstand extreme weather, UV exposure, and corrosive environments.
4. PowerNex Quality Assurance & Standards Compliance
As an experienced Oil-Immersed Distribution Transformer Manufacturer, PowerNex implements strict quality control throughout design, production, and testing.
4.1 Key Manufacturing Process
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Core processing and precision stacking
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High-accuracy winding and insulation application
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Core-coil assembly and vacuum drying
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Vacuum oil filling and hermetic sealing
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Tank fabrication, final assembly, and protective coating
4.2 Comprehensive Testing & Certification
All PowerNex distribution transformers undergo full factory testing to validate electrical and mechanical performance.
| Test Type | Scope | Standards |
|---|---|---|
| Routine Tests | Winding resistance, turns ratio, no-load & load loss, insulation resistance, applied & induced voltage | IEC 60076, ANSI / IEEE C57 |
| Type / Optional Tests | Temperature rise, lightning impulse, short-circuit withstand | IEC, DOE Energy Efficiency, EcoDesign |
5. Applications & Project Experience
PowerNex Power Distribution Transformers are deployed globally across demanding utility and industrial environments.
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Utility Distribution:
Three-phase 500 kVA – 2500 kVA, 13.8 kV / 480 V transformers for feeder upgrades and grid expansion. -
Rural Electrification:
Single-phase 25 kVA – 100 kVA distribution transformers for village electrification and remote power access. -
Industrial Facilities:
Reliable oil-immersed transformers supplying stable step-down power for heavy manufacturing and processing plants. -
Renewable Energy:
Distribution and collector transformers for solar and wind power systems.
6. Manufacturer-Direct Customization & Global Export
PowerNex is a trusted Distribution Transformer Supplier and Exporter, serving projects across North America, Europe, Asia, the Middle East, Africa, and Latin America.
Inquiry & Customization Options
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Custom kVA ratings and voltage ratios
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Special impedance design for grid fault levels
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Tank and enclosure customization
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OEM / ODM manufacturing
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Factory-direct wholesale pricing
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Global logistics and export support
Choose PowerNex Distribution Transformers
For rugged, efficient, and long-lasting power distribution in utility and industrial applications, choose PowerNex Distribution Transformers. Our commitment to international standards, advanced engineering, and manufacturer-direct support ensures dependable performance throughout the entire service life.
Power Reliable Distribution with Confidence.
PowerNex® – Your Global Partner in Oil-Immersed Distribution Transformer Technology.