2500kVA 20kV/0.4kV Corrugated Power Transformer for Renewable Energy Stations

This fully sealed oil-immersed distribution transformer integrates high-efficiency sheet radiators for optimal cooling and reliable power distribution. Designed for 6–10kV power networks, it covers rated capacities from 30kVA to 2500kVA.Core Features

Core: High-permeability cold-rolled silicon steel with step-lap joints, minimizing no-load loss by ~30% vs. traditional models.

Windings: Oxygen-free copper coils with multilayer cylindrical insulation, delivering superior short-circuit withstand strength.

Cooling: Corrugated sheet radiators enable natural oil circulation (ONAN), boosting heat dissipation while eliminating the need for an oil conservator.

Structure: Fully sealed tank isolates oil from air, slowing insulation aging and extending service life to 20–30 years.

Performance: Low noise (≤55dB), high efficiency, and minimal maintenance. Complies with GB 1094, IEC 60076, and GB/T 6451 standards.ApplicationsIdeal for urban/rural power grids, industrial complexes, and commercial facilities. Its compact design, strong seismic resistance, and reliable outdoor performance ensure stable power supply under fluctuating loads.

Different names for the product;
Oil-immersed transformer with sheet-type radiator
Oil-immersed distribution transformer with corrugated fin radiator
Oil-filled transformer with sheet radiator

Main uses
Main Applications
The oil-immersed transformer with sheet radiator is mainly used for power transmission and distribution in 6–10kV power grids. It is widely applied in urban and rural power supply systems, undertaking the task of stepping down high-voltage electricity to low-voltage power suitable for daily use and industrial production. It is an essential equipment to ensure stable power supply for residents, communities and rural areas.
In industrial fields, it is widely used in industrial parks, factories, mining enterprises and other places, providing stable and reliable power support for production equipment, mechanical equipment and electrical systems. Meanwhile, it is suitable for commercial facilities such as shopping malls, supermarkets, office buildings and hotels, meeting the large electricity demand of public places.
In addition, it is also applicable to outdoor power supply scenarios with harsh environments, thanks to its good sealing and heat dissipation performance, which can ensure stable operation under different climate conditions and fluctuating loads.

The oil-immersed transformer with sheet radiator is mainly applied in 6–10kV power transmission and distribution. It is widely used in urban and rural power supply systems, stepping down high-voltage electricity to low-voltage power for residents, communities and rural areas, ensuring stable daily and production power supply.

It is also widely used in industrial parks, factories and mining enterprises, providing reliable power support for production and mechanical equipment. Besides, it suits commercial facilities like shopping malls, office buildings and hotels to meet their large electricity demand.

With excellent sealing and heat dissipation, it is applicable to outdoor harsh environments, maintaining stable operation under different climates and fluctuating loads.

The oil-immersed transformer with sheet radiator has obvious competitive advantages in power distribution equipment. Its sheet-type radiator enables efficient heat dissipation, realizing natural oil circulation cooling, which reduces energy consumption and ensures stable operation even under long-term heavy load.

Adopting fully sealed structure, it effectively isolates oil from air, slows down insulation aging, extends service life to 20-30 years, and reduces maintenance costs significantly compared with traditional transformers. It also features low noise (≤55dB) and compact design, saving installation space.

With high-quality silicon steel core and oxygen-free copper windings, it has low no-load loss and strong short-circuit resistance, complying with international standards, which makes it more competitive in both price and performance.