3500 kVA 3-Phase Substation Transformer for Sale
The 3500 kVA 3-Phase Substation Transformer is specifically engineered for dependable voltage transformation within regional utility networks and industrial power distribution systems. Offering a rated capacity of 3.5 MVA, this transformer supports a 34.5 kV Delta-connected primary and a 12.47 kV grounded Wye secondary configuration, adaptable to project-specific voltage requirements.
Constructed with premium copper windings and high-grade silicon steel cores, this oil-immersed transformer delivers excellent efficiency, superior thermal performance, and durable operation in both 50 Hz and 60 Hz power systems. Its robust design minimizes energy losses and ensures reliable service in demanding electrical environments.
Manufactured in a state-of-the-art facility, each unit complies with rigorous CSA, UL, IEC, ANSI, and IEEE standards. Designed for outdoor use, the transformer features a weatherproof sealed tank, equipped with protective devices including Buchholz relay, pressure relief valve, temperature monitoring, and oil level gauges to maintain operational safety and longevity.
Ideal for utility substations, commercial and industrial power grids, renewable energy integration (solar, wind), mining operations, and other large infrastructure projects, this transformer supports reliable energy distribution throughout North and South America.
As a trusted global supplier and manufacturer, we offer flexible production schedules, competitive pricing, and comprehensive technical assistance. Our bulk availability and OEM services help clients optimize cost-efficiency while maintaining grid stability and compliance with international certifications.
3500 kVA 34.5KV 3-Phase Substation Transformer Technical Specs
| No. | Specification Item | Details | Notes/Remarks |
|---|---|---|---|
| 1 | Product Type | Oil-Immersed 3-Phase Substation Transformer | Designed for power distribution networks |
| 2 | Rated Capacity | 3.5 MVA | Customizable within this rating range |
| 3 | Phase | Three-Phase | Standard for utility and industrial use |
| 4 | Frequency | 50 Hz standard, 60 Hz optional | Suitable for Americas grid systems |
| 5 | Primary Voltage (High Voltage) | 34.5 kV | Adjustable from 6 kV up to 36 kV |
| 6 | Secondary Voltage (Low Voltage) | 12.47 kV | Other LV voltages available upon request |
| 7 | HV Winding Connection | Delta (Δ) | Alternative configurations offered |
| 8 | LV Winding Connection | Wye (Y) with grounded neutral | Ensures system safety and stability |
| 9 | Vector Group | Dyn11 | Customizable based on project requirements |
| 10 | Tap Changer | ±5% range with 2.5% increments | Available as off-load or on-load type |
| 11 | No-load Loss | Approx. 1.4 kW | Designed for high energy efficiency |
| 12 | Load Loss (at 75°C) | Approx. 11 kW | Minimizes operational power loss |
| 13 | Short Circuit Impedance | 6% ± 10% | Tailored for system fault management |
| 14 | Insulation Level HV Side | BIL 150 kV | Power frequency withstand 70 kV |
| 15 | Insulation Level LV Side | BIL 30 kV | Power frequency withstand 10 kV |
| 16 | Insulation Class | Class A standard; Class B optional | Based on operating conditions |
| 17 | Max Temperature Rise | 65°C standard; low loss option 55°C | Relative to ambient temperature |
| 18 | Altitude Rating | Up to 1000 meters | Derating applies beyond this altitude |
| 19 | Ambient Operating Temperature | -40°C to +50°C | Special versions for extreme climates |
| 20 | Cooling Method | ONAN standard; ONAF forced cooling optional | Efficient thermal management |
| 21 | Short Circuit Duration | 2 seconds | Designed to handle transient faults |
| 22 | Noise Level | ≤ 55 dB at 1 meter | Compliant with IEC 60076 and NEMA TR1 |
| 23 | Core Construction | Step-lap laminated silicon steel core | High magnetic efficiency |
| 24 | Winding Material | Copper standard; Aluminum optional | High conductivity for reliable operation |
| 25 | Tank Type | Fully sealed steel tank | Conservator tank available |
| 26 | Transformer Oil | Mineral oil to IEC 60296 standard | Eco-friendly oil options available |
| 27 | Protection Rating | IP00 standard; IP23 optional | Suitable for indoor/outdoor installation |
| 28 | Surface Finish | Sandblasted, primer coated, topcoat paint | Corrosion resistant for outdoor durability |
| 29 | Standard Accessories | Pressure relief valve, oil level gauge, thermometer, drain valve, grounding terminals | Complete protective set |
| 30 | Protection Devices | Buchholz relay (optional), pressure relief valve, temperature alarms | Customizable safety features |
| 31 | Monitoring Options | Optional IoT smart sensors (temperature, humidity, load) | Supports predictive maintenance |
| 32 | Termination Type | Cable box or porcelain bushings | Flexible connection choices |
| 33 | Cooling Radiators | Bolted or welded type | Optimized for heat dissipation |
| 34 | Standards Compliance | IEC 60076, ANSI C57, IEEE C57, CSA C88, GOST | Certification available upon request |
| 35 | Testing | Routine, type, and special tests | 100% tested before shipment |
| 36 | Certifications | CE, UL, CSA, CUL, GOST | Market-specific certification |
| 37 | Dimensions (approx.) | 2300 mm (L) × 1450 mm (W) × 1850 mm (H) | Final design may vary |
| 38 | Weight (approx., with oil) | 4200 kg | Depends on configuration |
✅ 3500 kVA 3-Phase Substation Transformer Overview
The 3500 kVA 3-Phase Substation Transformer delivers efficient, stable voltage transformation for utility and industrial power distribution systems. Featuring robust copper windings and mineral oil insulation, it offers high thermal stability and durability. Widely deployed in North and South America, it supports commercial substations, renewable energy facilities, and mining operations.
✅ Expanded Capacity Range for Medium Voltage Transformers
In addition to 3500 kVA, Energy Transformer supplies a comprehensive range of medium voltage substation transformers from 3000 kVA up to 20 MVA. Popular ratings include 4000 kVA, 5000 kVA, 6000 kVA, 10000 kVA, and larger units up to 20 MVA, catering to diverse project requirements across power distribution, industrial, and renewable energy sectors.
✅ 3-Phase Substation Transformer Specifications
Standard features encompass ONAN cooling, ±5% tap changer with 2.5% steps (on-load or off-load), and Dyn11 vector group. High-grade silicon steel cores reduce losses, and copper windings maximize conductivity. These transformers meet CSA, UL, IEC 60076, ANSI, IEEE, and DOE energy efficiency standards.
✅ Voltage & Amperage Ratings
Typical primary voltage ranges from 6 kV to 36 kV, with secondary voltages including 11 kV, 12.47 kV, and 13.8 kV. High ampacity copper windings provide efficient power delivery for heavy industrial loads, commercial facilities, and renewable energy plants.
✅ Dimensions & Weight for Larger Units
Dimensions and weight increase with capacity. For example:
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4000 kVA: approx. 2400 mm × 1500 mm × 1900 mm; ~4800 kg
-
5000 kVA: approx. 2600 mm × 1600 mm × 2000 mm; ~5600 kg
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6000 kVA: approx. 2800 mm × 1700 mm × 2100 mm; ~6400 kg
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10000 kVA: approx. 3500 mm × 2000 mm × 2300 mm; ~10,000 kg
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20000 kVA: custom dimensions, weight exceeding 18,000 kg, tailored to project needs
✅ Enclosure & Protection
All transformers feature weatherproof, fully sealed tanks with UV-resistant coatings. Standard ingress protection is IP23, with optional upgrades for harsh environments. Protective devices include Buchholz relays, pressure relief valves, temperature sensors, and oil level indicators.
Learn More:2500 kVA Substation Step-Down Transformer | 33kV to 11kV Oil-Filled Power Transformer
✅ Installation & Support
Energy Transformer provides turnkey support, including site prep, grounding, pad installation, and cable termination. Units arrive factory-tested, sealed, and ready for rapid commissioning across North and South America.
✅ Cooling, Windings & Efficiency
Standard ONAN cooling is enhanced by optional ONAF forced cooling for high load conditions. Copper windings are standard, with aluminum alternatives available. Designed to meet or exceed DOE 2016 and CSA energy efficiency guidelines, minimizing losses and operational costs.
✅ Certifications & Testing
All transformers are CSA, UL, IEC 60076, ANSI, IEEE, and NEMA certified. Comprehensive testing ensures performance and compliance, supported by detailed documentation for international shipments.
✅ Applications Across Capacities
Suitable for utility substations, large commercial facilities, mining sites, solar and wind farms, and heavy industrial applications throughout the Americas. Wide capacity range meets variable load demands and environmental conditions.
✅ For Sale & Pricing
Competitive pricing and flexible OEM/ODM options available for all capacities. Typical price ranges:
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3500 kVA: $25,000–$50,000 USD
-
6000 kVA: $40,000–$70,000 USD
-
10000 kVA: $80,000–$130,000 USD
-
20000 kVA: pricing upon request
CIF shipping available to major ports including Houston, Los Angeles, Panama City, Buenos Aires, Lima, and others.
✅ Manufacturer & Wholesale Supply
As a leading Chinese manufacturer with CSA, UL, and IEC certifications, Energy Transformer offers low MOQs, fast lead times, and customized solutions for contractors, utilities, and OEM partners across North and South America.
✅ Related Transformer Models
-
2000 kVA and Above Three-Phase Substation Transformers
-
2500 kVA to 10000 kVA Medium Voltage Oil-Immersed Transformers
-
High-Capacity Dry-Type Medium Voltage Transformers
-
Specialized Transformers for Solar Inverter and Renewable Energy Applications
Learn More:What Is a Substation Transformer? A Practical Guide for Power Projects
Why Choose Energy Transformer's 3500 kVA 3-Phase Substation Transformer – CSA/UL/IEC Certified for North & South America
Energy Transformer's 3500 kVA 3-Phase Substation Transformer is engineered to deliver reliable and efficient voltage transformation across commercial, industrial, and utility power networks throughout North and South America. Featuring premium copper windings and oil-immersed cooling technology, this unit provides consistent step-down voltage performance while ensuring operational safety and long-term durability.
Designed for harsh outdoor conditions, each transformer is enclosed in a sturdy, weatherproof steel tank filled with eco-friendly insulating oil. This rugged construction protects against environmental challenges such as moisture, dust, and mechanical stresses, ensuring dependable operation over many years.
Key Benefits Include:
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High Efficiency & Industry Compliance: Built to meet rigorous CSA, UL, IEC 60076, ANSI, and IEEE standards, guaranteeing superior efficiency and full regulatory compliance.
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Flexible Installation & Configuration: Suitable for a variety of substation layouts, including radial and loop systems, with customizable tap changers, vector groups, and connection options to suit specific project needs.
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Tailored Specifications: Standard copper windings with options for voltage adjustments, protection features, and mounting styles to align with your exact application requirements.
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Quiet & Stable Operation: Engineered for low noise emissions and consistent load management, making it ideal for urban substations, industrial complexes, and renewable energy integrations.
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Market-Ready Certification: Fully certified for use in the U.S., Canada, Mexico, Brazil, Argentina, Peru, and other countries in North and South America, supporting seamless project deployment across the region.
Whether you're upgrading utility substations, powering industrial zones, integrating renewable energy sources, or serving large commercial facilities, Energy Transformer's 3500 kVA 3-Phase Substation Transformer offers a robust, efficient, and customizable solution tailored to medium voltage power distribution needs.
Contact us today for competitive pricing, stock availability, or a personalized quote to support your substation transformer project.
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