Outdoor Dry Type Transformer

When planning for reliable outdoor power distribution, selecting the right transformer is critical for safety, longevity, and performance. Outdoor Dry Type Transformers present an ideal solution, eliminating the need for flammable liquid insulation and offering robust construction for exposed environments. A prime example of this capability is our 750 KVA Dry Type Transformer, engineered to deliver high-efficiency power conversion in demanding outdoor settings. These units are inherently designed as a 3 Phase Dry Type Transformer, providing balanced and stable power for commercial and industrial applications. Their construction is not limited to indoor use; they are purpose-built as a durable 3 Phase Outdoor Transformer, featuring weatherproof, corrosion-resistant enclosures that protect against moisture, dust, UV radiation, and extreme temperatures. This makes them perfectly suited for installations like renewable energy sites, utility substations, mining operations, and construction projects where safety and environmental resilience are paramount.
The core advantage of our Outdoor Dry Type Transformer lies in its maintenance-free design and exceptional safety profile. By utilizing high-grade, vacuum pressure-impregnated (VPI) epoxy resin or cast resin insulation, the transformer windings are completely sealed against environmental contaminants. This encapsulation not only prevents moisture ingress but also significantly enhances dielectric strength and thermal conductivity. The absence of insulating oil removes risks associated with leaks, spills, and potential fire hazards, allowing for installation closer to the load center in populated or environmentally sensitive areas. Furthermore, the design prioritizes efficient cooling through natural air convection or forced air systems, ensuring stable operation even under continuous full load. The robust NEMA 3R or higher-rated enclosure provides an additional layer of protection, safeguarding internal components from rain, sleet, and wind-blown debris. This combination of advanced insulation technology and rugged mechanical design results in a product with a long service life, reduced total cost of ownership, and minimal environmental impact, aligning with modern standards for sustainable and safe electrical infrastructure.

Key Specifications & Technical Parameters

Our Outdoor Dry Type Transformers are engineered to meet and exceed international standards such as IEEE, ANSI, and IEC. Below is a summary of the typical technical specifications and available options.

Standard Electrical Parameters

• Capacity Range: From 25 KVA up to 5000 KVA
• Primary Voltage: Up to 35 kV
• Secondary Voltage: Common low-voltage ratings (e.g., 480V, 600V)
• Frequency: 50 Hz / 60 Hz
• Phases: Three-Phase and Single-Phase configurations available
• Insulation Class: Class F (155°C) or Class H (180°C) standard
• Temperature Rise: 80°C, 115°C, or 150°C rise options
• Impulse Level: High BIL (Basic Impulse Level) for surge protection

Construction & Environmental Features

• Enclosure Rating: NEMA 3R (standard), options for NEMA 4 or 4X
• Core Material: High-grade, low-loss, grain-oriented silicon steel
• Winding Material: Aluminum or Copper conductors
• Cooling Method: AN (Air Natural) or AF (Air Forced)
• Insulation System: VPI epoxy or cast resin for complete protection
• Sound Level: Low-noise design compliant with NEMA ST-20
• Finish: Powder-coated paint for superior corrosion resistance
• Accessories: Options include lightning arresters, protective rings, temperature controllers, and removable lifting lugs.

Performance Data Table