250 kVA Dry Type Transformer for Industrial Applications — High Voltage, Indoor Installation
Jan 21, 2026
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This 250 kVA dry-type transformer is exquisitely engineered to deliver stable, energy-efficient, and maintenance-free power for high-demand industrial and commercial operations. Designed for high-voltage input and 480Y/277V output, this medium-voltage dry-type transformer is the ideal solution for indoor step-down applications such as factories, commercial complexes, and utility facilities.
Manufactured with high-grade silicon steel cores and precision copper windings, the 250 kVA dry-type transformer boasts exceptional heat dissipation performance, which reduces no-load and load losses while extending service life. Its dry-type insulation system enhances fire resistance, eliminates oil-related environmental hazards, and ensures safe operation in enclosed or ventilated indoor environments.
Housed in a robust, corrosion-resistant enclosure, this indoor dry-type power transformer complies with ANSI, IEEE, UL, CSA, and CE certification standards, meeting the safety and quality requirements of the global market. It is widely deployed across North America (the US, Canada), Europe (Germany, France, Italy, Spain, the UK), and the Middle East (the UAE, Saudi Arabia, Qatar, Israel), for applications including manufacturing plants, commercial buildings, renewable energy systems, and infrastructure upgrades.
As a professional dry-type transformer manufacturer, GNEE offers fast factory direct supply, OEM/ODM customization services, and flexible logistics solutions to meet project delivery timelines. Our 250 kVA medium-voltage dry-type transformer is trusted by engineering contractors, power distributors, and industrial customers for its reliable performance in mission-critical environments.
Choose GNEE for a durable, high-performance 250 kVA dry-type transformer engineered to meet global energy needs with efficiency, safety, and long-term reliability.
Learn More: 1000 kVA Cast Resin Transformer | 13.8 kV to 480Y/277V Dry-Type Distribution
✅ Overview of 250 kVA Dry-Type Transformer
Configured with a 13.8kV primary side and 480Y/277V secondary side, this 250 kVA dry-type transformer delivers stable, high-efficiency, and maintenance-free power for industrial and commercial energy systems. Manufactured by GNEE, this high-capacity dry-type power transformer adopts a Vacuum Pressure Impregnation (VPI) process, with copper or aluminum winding options and flame-retardant insulating materials. It complies with global standards including UL, ANSI/IEEE C57.12, CSA, CE, and IEC 60076-11, and is suitable for indoor installation in high-voltage environments.
✅ Definition of 250 kVA Dry-Type Transformer
The 250 kVA medium-voltage dry-type transformer uses solid insulation (resin or air) instead of oil to insulate its windings. This oil-free design improves safety and minimizes fire risks, making it suitable for installation in factories, clean rooms, subway stations, medical centers, data centers, and renewable energy systems. It steps down high-voltage transmission voltages (up to 35kV) to safe, usable low-voltage output, enabling efficient energy distribution across facilities.
✅ Advantages of 250 kVA Dry-Type Transformer
Dry-type transformers require no oil maintenance and feature superior fire resistance, making them ideal for environmentally sensitive areas. This 2500 kVA dry-type transformer offers high dielectric strength, moisture resistance, and low electromagnetic interference (EMI). Its compact design, minimal vibration, and low noise output make it the perfect choice for high-density urban indoor spaces such as high-rise commercial buildings and processing plants.
✅ Dimensions of 250 kVA Dry-Type Transformer
Physical dimensions vary based on configuration, enclosure, and accessories:
- Length: 2200–2600 mm
- Width: 1300–1500 mm
- Height: 1900–2200 mm
- Net Weight: Approx. 4700–5400 kg
Detailed mechanical drawings and installation templates are available upon request.
Learn More: 300 kVA Dry-Type Transformer for Indoor & Industrial Use | UL/CSA Certified
✅ Weight & Handling of 250 kVA Dry-Type Transformer
Shipping Weight: Approx. 5.5 tons (including enclosure)
Mounting Options: Skid base, anti-vibration pad, or rail-mounted base
Lifting Points: Integrated structural eyebolts and base fork pockets
GNEE provides comprehensive support for logistics, unloading, and on-site positioning.
✅ Price Range of 250 kVA Dry-Type Transformer
Pricing typically ranges from US$26,000 to US$40,000, depending on materials (copper/aluminum), insulation type, cooling method, and certifications. GNEE offers highly competitive factory-direct pricing, with flexible shipping terms including EXW, FOB, and CIF to meet diverse project requirements.
✅ Cooling Methods of 250 kVA Dry-Type Transformer
Natural Air (AN): Standard convection for base load applications
Forced Air (AF): Suitable for regions with high ambient temperatures
Hybrid Cooling: Automatically switches between AN and AF modes based on load
Equipped with high-performance fans and an intelligent temperature control system for overload protection.
✅ Applications of 250 kVA Dry-Type Transformer
Heavy industrial manufacturing
Hospitals, universities, and clean room facilities
Renewable energy systems (solar, wind, battery storage)
Government buildings, subway stations, and tunnels
Oil & gas facilities and substations
High-rise data centers and smart buildings
✅ Certifications & Testing of 250 kVA Dry-Type Transformer
- IEC 60076-11
- ANSI/IEEE C57.12.01 & C57.12.91
- UL 1562 / CSA C22.2 No.47
- CE / UKCA / SASO / GOST / IECEx (optional)
Custom routine tests, type tests, and special tests are available. Independent third-party inspections (SGS, BV, TUV) can be provided.
Whether you are planning substation upgrades, new factory construction, or powering commercial complexes, our 250 kVA medium-voltage dry-type transformer delivers safe, reliable, and future-proof voltage conversion. It is a trusted solution for engineers, EPC general contractors, and subcontractors who prioritize quality, performance, and compliance.
📩 Contact our team now to obtain product drawings, specifications, and a detailed quote tailored to your project timeline and regional requirements.
250 kVA Dry Type Transformer for Industrial Applications Technical Specs
| No. | Item | Specification | Remarks |
|---|---|---|---|
| 1 | Power Rating | 250 kVA | Configurable from 500 kVA up to 10,000 kVA |
| 2 | Primary Voltage | 13.8 kV Delta (typical industrial input) | Optional: 11 kV, 15 kV, 24.9 kV, 33 kV, 34.5 kV available |
| 3 | Secondary Voltage | 480Y/277 V Wye Grounded | Also available: 208Y/120 V, 600Y/347 V, 400Y/230 V |
| 4 | Phase | Three-phase, 60 Hz | Single-phase and dual-voltage configurations on request |
| 5 | Insulation Type | Dry Type (VPI / VPE Resin-Coated) | Oil-free design, environmentally safe |
| 6 | Insulation Class | Class F (155°C) | Optional upgrade to Class H (180°C) for high-heat zones |
| 7 | Temperature Rise | 115°C (standard) | Optional 80°C or 150°C for lifecycle or budget optimization |
| 8 | Cooling Method | Air Natural (AN) / Air Forced (AF) | Suitable for enclosed or ventilated indoor spaces |
| 9 | Impedance Voltage | 5.0% – 7.0% | Adjustable for arc flash or coordination requirements |
| 10 | Short Circuit Withstand | 35–65 kA for 2 seconds | Custom ratings for industrial fault conditions |
| 11 | Voltage Taps | ±2.5%, ±5%, up to 6 taps | Supports both de-energized and on-load tap changers |
| 12 | Frequency | 60 Hz | 50 Hz available for international projects |
| 13 | Insulation Resistance | ≥2000 MΩ @ 1000VDC | Superior insulation for dusty or high-moisture areas |
| 14 | Magnetic Leakage Flux | Controlled-core low-leakage design | Prevents magnetic interference in nearby electronics |
| 15 | Core Material | High-grade grain-oriented silicon steel | High magnetic permeability, reduced no-load loss |
| 16 | Winding Material | Copper (OFHC) | Aluminum windings available for economic applications |
| 17 | Enclosure Material | Powder-coated galvanized steel | Built to resist rust, corrosion, and mechanical wear |
| 18 | Protection Rating | NEMA 1 or NEMA 3R indoor standard | Optional: IP44, IP54, NEMA 12 for special applications |
| 19 | Operating Temp Range | -30°C to +50°C | Optional -40°C to +55°C for desert or cold climates |
| 20 | Humidity Tolerance | 0–95% non-condensing | Designed for indoor use in tropical or coastal zones |
| 21 | Noise Level | ≤58 dB(A) | Compliant with low-noise building and hospital codes |
| 22 | Weight Estimate | 3200–3800 kg | Final weight varies based on winding and enclosure |
| 23 | Dimensions (L x W x H) | Approx. 1900 x 1400 x 1950 mm | Custom designs for skid-mount or ventilation needs |
| 24 | Standards Compliance | UL 1561, ANSI C57, IEEE C57.12, CSA, CE | Valid for USA, Canada, Germany, UAE, UK, France |
| 25 | Warranty | 2 years standard | Optional extended warranty and 24/7 tech support |
| 26 | Application Scenarios | Data centers, steel plants, solar inverters, chemical factories | Excellent for grid tie-in, backup systems, or load centers |
| 27 | Global Supply Coverage | Direct manufacturer supply & export | Main markets: USA, Canada, Germany, France, UK, UAE, Saudi Arabia, Israel, Italy, Spain |