1000 kVA high altitude dry-type transformer for 5000 m installation. Varelen provides reinforced insulation, low partial discharge, and altitude-corrected thermal design for extreme environments.
Enginner Sun
Varelen is proud to share the successful installation of a 1000 kVA dry-type transformer for our valued customer in Peru. This unit is designed and manufactured to operate reliably at an altitude of 4500 meters above sea level, where temperature fluctuations, reduced air density, and harsh environmental conditions present unique challenges for electrical equipment.
The transformer is specifically engineered for continuous operation at altitudes up to 5000 meters, where reduced air density significantly lowers dielectric strength.
Increased electrical clearances and creepage distances
Reinforced inter-turn and inter-layer insulation system
Optimized electric field distribution to suppress local stress concentrations
Partial discharge level strictly controlled under high-altitude test conditions
At 5000 m elevation, natural air convection and heat dissipation capability are significantly reduced.
Thermal derating incorporated into core and winding design
Enlarged ventilation ducts and optimized airflow paths
High thermal conductivity insulation materials applied
Temperature rise designed in accordance with altitude correction factors
Optional forced air cooling (AF) configuration available
This dry-type transformer demonstrates Varelen’s commitment to engineering excellence and long-term performance in demanding environments. Every component — from the windings to the enclosure — is optimized for reliability, efficiency, and safety.
Key features include:
🔹 High-efficiency copper windings ensuring low losses and superior conductivity
🔹 Class H insulation system, providing excellent thermal endurance
🔹 Fully enclosed, dust-protected housing designed for outdoor and high-altitude operation
🔹 Oil-free, eco-friendly design, eliminating leakage risks and reducing maintenance needs
The transformer design complies with international standards incorporating altitude correction factors:
IEC 60076 (Dry-type transformer altitude correction)
IEEE C57 series (Altitude and temperature rise considerations)
Project-specific utility or EPC technical specifications
Dry-type power transformers are increasingly preferred in modern power systems due to their environmental benefits and operational safety. By using Varelen’s cast resin technology, customers gain reliable performance without the risks associated with oil-immersed equipment — making them ideal for industrial, mining, and renewable energy applications.
At Varelen, we take pride in supporting clients around the world with custom-engineered transformer solutions tailored to their specific conditions. Whether for coastal regions, desert zones, or high-altitude installations like this project in Peru, our transformers are built to deliver dependable performance and long service life.
FAQ:
Reduced air density lowers natural convection cooling efficiency. Varelen compensates by:
Applying altitude-corrected thermal derating
Enlarging ventilation ducts
Using high thermal conductivity insulation
Offering optional forced air cooling (AF)
applications include:
High-altitude mining and mineral processing plants
Wind, solar, and hydroelectric power stations
Mountain railways and tunnel power supply systems
Containerized substations in remote plateau regions
