1000 kVA Cast Resin Transformer 13.8 kV to 480Y/277V Dry Type Distribution
Jan 21, 2026
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This 1000 kVA cast resin transformer is engineered for efficient and reliable power distribution in commercial, industrial and utility applications. With a primary voltage of 13.8 kV and a secondary voltage of 480Y/277V, it delivers a fire-safe power solution for both indoor and outdoor environments.
Featuring high-grade cast resin insulation, this transformer boasts exceptional fire, moisture and contamination resistance, making it the ideal choice for harsh or sensitive installation environments. Its core is laminated with premium grain-oriented silicon steel sheets to effectively reduce no-load losses, while the precision copper windings ensure low load losses and outstanding heat dissipation performance.
Housed in a durable, corrosion-resistant enclosure, this cast resin transformer has minimal maintenance requirements and offers long-term reliability. It complies with stringent industry standards including ANSI, IEEE, UL, CSA and CE, guaranteeing safe operation on North and South American power grids.
We offer a wide range of customization options including cooling methods, voltage taps and mounting configurations, allowing the cast resin transformer to be tailored to your project needs. It is widely used in utility power distribution networks, renewable energy grid connections, commercial buildings and industrial power systems.
GNEE is a leading manufacturer and supplier of cast resin transformers, with flexible production capacity, ample in-stock inventory and highly competitive factory-direct pricing. Our cast resin transformers are trusted by customers in key markets including the United States, Canada, Mexico, Brazil, Argentina, Chile, Colombia and Peru, serving EPC contractors, utility companies and industrial users across North and South America.
Learn More: 2500 KVA Dry Type Transformer For Industrial Applications - High Voltage, Indoor Installation
✅ Overview of 1000 kVA Cast Resin Transformer, 13.8 kV to 480Y/277V Dry-Type Distribution
This dry-type cast resin transformer with a rated capacity of 1000 kVA, a primary rated voltage of 13.8 kV and a secondary rated voltage of 480Y/277V, is widely used in the power distribution systems of commercial, industrial, utility and institutional facilities. Manufactured by GNEE, this transformer is eco-friendly, flame-retardant and low in maintenance costs, with high mechanical strength and Class F/H insulation. Suitable for both indoor and outdoor use, it supports Air Natural (AN) or Air Forced (AF) cooling, and complies with IEC 60076-11, ANSI/IEEE C57.12.91, UL1562, CSA and CE standards.
✅ What is a Cast Resin Transformer?
A cast resin transformer is a type of dry-type transformer whose windings are encapsulated in epoxy resin via a vacuum casting process. This encapsulation protects the windings from moisture, dust and chemical contamination, enabling installation in high-humidity, heavily polluted or flammable areas without the need for special fire protection measures.
Learn More: How to Select the Right 1000 kVA 13.8 kV 480 V Power Transformer for Your North or South American Project
✅ What is a Dry-Type Cast Resin Distribution Transformer?
Dry-type cast resin distribution transformers are used to step down medium voltage (e.g., 13.8 kV) to low voltage (e.g., 480Y/277V) for the safe delivery of electricity to end-user loads. These transformers eliminate the need for oil, thereby enhancing fire safety and simplifying maintenance. They are particularly suitable for installation in hospitals, airports, commercial buildings, tunnels, subway stations and renewable energy power plants.
✅ Dimensions of 1000 kVA Dry-Type Cast Resin Transformer
Dimensions may vary slightly based on configuration. Typical specifications:
Length: 2000–2300 mm
Width: 1000–1200 mm
Height: 1700–2000 mm
Net Weight: Approx. 4000–4500 kg
GNEE provides complete layout drawings, lifting point details and anchor bolt designs for seamless installation.
Learn More: 300 kVA Dry-Type Transformer for Indoor and Industrial Use | UL/CSA Certified
✅ Weight and Handling of 1000 kVA Dry-Type Cast Resin Transformer
Shipping Weight: Approx. 4.5 to 5.2 metric tons (depending on enclosure)
Lifting Points: Integrated into the frame
Mounting Options: Skid base, rail-mounted or floor-mounted
GNEE ensures safe transportation with reinforced packaging, lifting instructions and detailed user manuals.
✅ Pricing of 1000 kVA Dry-Type Cast Resin Transformer
The typical price range for a 1000 kVA 13.8 kV to 480Y/277V dry-type transformer is US$11,500 to US$19,000, subject to conductor material (copper/aluminium), vector group, accessories and enclosure rating. By manufacturing cores, windings and conducting resin casting processes in-house, GNEE offers highly competitive pricing. Multiple trade terms including EXW, FOB and CIF are available.
✅ Cooling Types for 1000 kVA Cast Resin Transformer
AN (Air Natural): Standard natural air convection
AF (Air Forced): Forced air cooling for overload conditions
Two-stage Cooling: Suitable for applications with significant load fluctuations
✅ Protection and Monitoring Options for 1000 kVA Dry-Type Transformer
Digital temperature controllers (PT100 or PTC sensors)
Over-temperature alarm and trip functions
Fan control unit (for AF models)
Optional RS485 or Modbus RTU interface
Surge protectors and enclosure grounding
Learn More: 2500 kVA Dry Type Transformer for Industrial Applications
✅ Vector Groups for 1000 kVA Cast Resin Transformer
Common vector group options:
Dyn11: Widely used in step-down power distribution systems
Yyn0: Suitable for balanced load conditions
Yd11 or Yz11: For grid synchronization requirements
GNEEsupports custom vector group designs according to customer specifications and grid requirements.
✅ Applications of 1000 kVA Cast Resin Transformer
Commercial complexes
Hospitals and medical campuses
High-rise residential buildings
Airports and subway stations
Wind and solar power plants
Chemical and manufacturing factories
Data centers and telecommunications hubs
Learn More:2000 kVA Medium Voltage Dry Type Transformer 12470V to 480Y 277V Three Phase North America
Why Choose the 1000 kVA Cast Resin Dry-Type Transformer (13.8 kV to 480Y/277V)?
GNEE's 1000 kVA cast resin dry-type transformer is engineered for safe, efficient and eco-friendly power distribution in commercial, industrial and institutional environments. With a primary voltage of 13.8 kV and a secondary output voltage of 480Y/277V, it is the ideal choice for low-voltage power grids, critical facility power systems and renewable energy grid connections.
✅ Fire-Safe and Eco-Friendly Design
Flame-retardant, self-extinguishing epoxy resin encapsulation eliminates fire hazards and oil leakage issues. Perfect for indoor installation, high-rise buildings, hospitals and data centers.
✅ Suitable for Harsh Environments
Moisture-proof insulation and sealed windings ensure maintenance-free operation even in high-humidity, dusty or corrosive environments. Ideal for coastal, desert or industrial areas.
✅ Compliant with Global Standards
Tested and certified to UL, CSA, IEC 60076-11, ANSI/IEEE and CE standards. Compatible with power grid systems in the USA, Canada, South America, Southeast Asia and the Middle East.
✅ Compact, Quiet and High-Efficiency
Low-loss silicon steel core and precision coil windings deliver over 98.5% efficiency and extremely low electromagnetic noise. Air natural (AN) cooling as standard, with optional air forced (AF) cooling for space-constrained applications.
✅ Flexible Configuration and Customization
Available in open and enclosed (IP23/IP54) versions. Optional temperature sensors, surge protectors, custom enclosure paint colors and smart monitoring modules. Dyn11 Vector Group as standard.
✅ Rapid Production and Export Delivery
Typical lead time: 3–5 weeks. Products are packed for export and can be shipped worldwide by road, rail, sea or air. Multiple trade terms available including EXW, FOB, CIF or DDP.
📩 Contact GNEE now for datasheets, product drawings or a custom quote for your 1000 kVA dry-
type transformer requirements.
✅ Factory-direct sales
✅ Global certifications
✅ Proven reliability in over 70 countries and regions
1000 kVA Cast Resin Transformer 13.8 kV to 480Y/277V Technical Specs
| No. | Item | Specification | Remarks |
|---|---|---|---|
| 1 | Power Rating | 1000 kVA | Customizable from 15 kVA up to 1500 kVA |
| 2 | Primary Voltage | 13.8 kV (Delta connection) | Customizable up to 34.5 kV or higher |
| 3 | Secondary Voltage | 480Y/277 V (Wye grounded neutral) | Other options: 120/240 V, 208Y/120 V, 600Y/347 V |
| 4 | Phase | Three-phase, 60 Hz | Single-phase and other configurations available |
| 5 | Insulation Type | Cast Resin | Oil-free, fire-resistant, environmentally friendly design |
| 6 | Insulation Class | Class F (155°C) | Optional Class H (180°C) and higher temperature ratings |
| 7 | Temperature Rise | 115°C (standard) | Customizable for higher temperature rise |
| 8 | Cooling Method | Air Natural (AN), Air Forced (AF) | NEMA 3R rated for indoor/outdoor installation |
| 9 | Impedance Voltage | 5% - 6.5% | Adjustable per project requirements |
| 10 | Short Circuit Withstand | 30 to 60 seconds | Higher withstand times available on request |
| 11 | Voltage Taps | ±2.5%, ±5%, 3-5 taps | Facilitates voltage regulation and system stability |
| 12 | Frequency | 60 Hz | 50 Hz versions available for export markets |
| 13 | Insulation Resistance | ≥1000 MΩ | Ensures excellent insulation performance |
| 14 | Leakage Magnetic Flux | Low leakage design | Minimizes electromagnetic interference |
| 15 | Core Material | Cold-rolled grain-oriented silicon steel | High efficiency, low no-load losses |
| 16 | Winding Material | High-purity oxygen-free copper | Ensures high conductivity and thermal endurance |
| 17 | Enclosure Material | Heavy-duty cold-rolled steel | Corrosion resistant, dust and water protection |
| 18 | Protection Rating | NEMA 3R (Rain and dust resistant) | Customizable to NEMA 1, NEMA 12 for indoor applications |
| 19 | Operating Temperature Range | -20°C to 40°C | Extended ranges from -40°C to +50°C available |
| 20 | Humidity Adaptability | 0% to 95%, non-condensing | Suitable for high humidity and damp environments |
| 21 | Noise Level | ≤55 dB(A) | Low noise design suitable for urban and indoor use |
| 22 | Approximate Weight | 1500–2000 kg | Varies with custom options |
| 23 | Dimensions (L x W x H) | Approx. 1500 x 1100 x 1700 mm | Custom dimensions available |
| 24 | Standards Compliance | ANSI C57.12, IEEE, UL, CSA, CE | Meets major North & South American market standards |
| 25 | Warranty | 2 to 5 years | Extended warranty options available |
| 26 | Typical Applications | Commercial power distribution, industrial plants, renewable energy projects, substations | Ideal for solar, wind, manufacturing, and utility grids |
| 27 | Global Supply & Service | Worldwide shipping | Focus on North America (USA, Canada, Mexico) and South America (Brazil, Argentina, Chile, Colombia) |