Medium voltage electrical transformers are fundamental elements in the energy distribution systems of practically all industrial sectors. From photovoltaic plants to manufacturing processes and naval environments, these devices enable energy to be transported and adjusted safely, efficiently, and constantly. The quality of the transformer not only influences the installation’s performance but also operating costs, grid stability, and the lifespan of the equipment it powers.
At EREMU, a company with over six decades of experience in the design and manufacture of transformers, we know that every project has specific needs. For this reason, we develop medium voltage equipment completely adapted to the working conditions, technical requirements, and current regulations in each country or sector. A well-designed transformer can make the difference between an efficient installation and one vulnerable to failures or cost overruns.
What Are Medium Voltage Electrical Transformers?
Basic Operation and Main Features
Medium voltage electrical transformers usually operate in ranges from 1 kV to 36 kV. Their mission is to modify the voltage level between different stages of the electrical system, allowing the energy to be adjusted for transport or final use. They do this through the principle of electromagnetic induction: the field generated in the primary windings induces a voltage in the secondary windings. Although the principle is simple, the engineering behind a modern transformer is highly complex. Factors such as core losses, insulation quality, cooling methods, or protection systems determine whether the transformer will be efficient and stable for years.
Industrial and Energy Applications
Medium voltage transformers are used in multiple sectors:
- Heavy industry: ovens, high-consumption machinery, process control.
- Renewable energies: wind farms, solar plants, mini-hydroelectric plants.
- Naval sector: cargo ships, offshore platforms, and shipyards.
- Distribution networks: substations and transformation centers.
The versatility of this equipment requires adapted, resistant, and internationally approved solutions.
Types of Medium Voltage Electrical Transformers at EREMU
Encapsulated Dry-Type Transformers
Dry-type transformers do not use oil as a cooling medium. Instead, they use epoxy resin to encapsulate the windings, making them clean, safe, and low-maintenance equipment. They are perfect for environments where a spill is inadmissible or where the risk of fire must be minimized, such as hospitals, tunnels, or indoor industrial facilities.
Oil-Immersed Transformers
These are the most common option when high cooling capacity and continuous operation are required. The dielectric oil acts as an insulator and a heat dissipating medium, which extends the transformer’s lifespan. This equipment offers an excellent balance between efficiency and cost, making it ideal for medium and high energy demand applications.
Benefits of Choosing EREMU for Your Medium Voltage Electrical Transformers
Maximum Energy Efficiency
At EREMU, we use premium quality materials, such as low-loss cores, treated magnetic sheets, and optimized winding systems. This results in fewer no-load and under-load losses, significantly reducing operating costs throughout the equipment’s useful life.
Durability and Safety
Our transformers comply with IEC, UNE, and UL regulations, in addition to including the CE marking. This guarantees that each unit has passed rigorous tests for electrical safety, mechanical resistance, thermal behavior, and insulation levels.
Reduced Maintenance and Long Lifespan
The internal design is conceived to facilitate access to components, reduce wear, and ensure adequate cooling. The direct consequence is fewer technical shutdowns, fewer incidents, and greater operational availability.
Innovation and Sustainability in Medium Voltage Transformers
Innovation is one of EREMU’s pillars. Thanks to advanced electromagnetic and thermal simulation tools, we can predict the transformer’s behavior before manufacturing it. This optimizes production times and guarantees compliance with the required parameters. Furthermore, our philosophy is aligned with sustainability: we select materials with a lower environmental impact and constantly improve energy efficiency to reduce losses and indirect emissions.
Conclusion – Choose the Best Solution for Your Installation
Investing in high-quality medium voltage electrical transformers is essential for the safety, efficiency, and continuity of any installation. At EREMU, we design and manufacture robust, efficient equipment adapted to each project. If you would like professional advice or need a personalized quote, we invite you to visit our contact page and discover all our services.
