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Premium Transformer Cooling Solutions by STE Technic

At Merge AB, we’re proud to partner with STE Technic, a leading manufacturer of transformer cooling solutions, to bring you high-quality products designed for oil-filled and dry-type power and distribution transformers. With a focus on durability, efficiency, and innovation, STE Technic’s products are engineered to meet the demanding conditions of power generation, transmission, and distribution environments. Explore our curated selection of transformer cooling equipment below, designed to enhance performance and ensure the longevity of your energy infrastructure.

Transformer Cooling Fans

Optimized Airflow for Maximum Efficiency

STE Technic offers a range of high-performance cooling fans tailored for transformer applications, ensuring optimal temperature regulation and extended equipment lifespan.
  • Axial Fans: High-performance axial fans designed for power and distribution transformers, offering robust airflow and durability in harsh environments.
  • Cross-Flow Fans: Engineered for uniform air distribution, ideal for both oil-immersed and dry-type transformers.
  • Centrifugal Fans: High-pressure fans for specialized cooling needs, ensuring efficient heat dissipation.
  • Ex-Proof Fans (ATEX and IEC-Ex Certified): Explosion-proof fans for hazardous environments, meeting strict safety standards.
  • Panel and Box Fans: Compact fans for enclosure cooling, perfect for transformer control panels.
These fans are designed with market needs in mind, offering long-lasting performance and customizable variations to suit diverse industrial applications.

Oil and Air Coolers

Advanced Cooling for Transformer Longevity

STE Technic’s oil and air coolers provide efficient heat management for transformers, ensuring reliable operation under high loads.
  • OFWF (Oil-Forced Water-Forced) Coolers: High-efficiency coolers for oil-immersed transformers, featuring a double-wall design for extra safety and durability.
  • OFAF (Oil-Forced Air-Forced) Coolers: Robust air-cooled systems for effective heat dissipation in oil-filled transformers.
  • AFWF (Air-Forced Water-Forced) Coolers: Hybrid cooling solutions combining air and water for enhanced performance.
  • AFRF (Air-Forced Refrigerant-Forced) Coolers: Specialized coolers using refrigerant gas for advanced cooling applications.
  • Double Wall OFWF Oil Coolers for Wind Turbines: Designed for wind turbine transformers, offering high fluid pressure resistance, vibration durability, and a compact, maintenance-free design with stainless steel materials for corrosive environments.
These coolers are built to withstand extreme conditions, providing reliable cooling for transformers in power plants, windfarms, and industrial settings.

Dry-Type Transformer Cooling Systems

Innovative Solutions for Efficient Heat Dissipation

STE Technic’s dry-type transformer cooling systems are designed to manage heat effectively without the use of oil, offering a sustainable and low-maintenance solution.
  • Self-Operated Dry-Type Cooling Systems: A self-contained system that circulates air internally and dissipates heat via an integrated outdoor dry cooler, capable of handling 75 kW of heat with just 5.9 kW of input power.
  • Air-Forced Cooling Solutions: Customizable air-cooling systems for dry-type transformers, ensuring efficient heat management in compact designs.
These systems are ideal for applications where oil-based cooling isn’t feasible, providing a green and efficient alternative for modern energy infrastructure.

Sensors and Detector Systems

Smart Monitoring for Transformer Reliability

STE Technic develops advanced sensors and detectors to enhance transformer performance and safety, offering real-time insights into critical parameters.
  • Temperature Sensors: Precision sensors for monitoring transformer temperature, ensuring optimal operating conditions.
  • Oil Level Detectors: Reliable detectors to track oil levels in oil-immersed transformers, preventing operational issues.
  • Moisture Sensors: Sensors to detect moisture levels, protecting transformers from degradation.
  • Custom Sensors: Tailored sensor solutions designed and manufactured to meet specific project requirements.
Developed at STE Technic’s Technology Park branch, these sensors are fully customizable, providing manufacturers and end-users with the tools to maintain transformer health and prevent downtime.

Special Cooling Solutions

Customized Cooling for Unique Applications

Beyond conventional methods, STE Technic offers specialized cooling solutions to meet the unique needs of your transformer systems.
  • Water-Based Cooling Cells: Custom-designed cells using water for high-efficiency heat transfer.
  • Air-Based Cooling Systems: Advanced air-cooling solutions for specific transformer configurations.
  • Refrigerant Gas Cooling: Specialized systems using eco-friendly refrigerant gases for enhanced cooling performance.
Developed at STE Technic’s STE Technic supports your project from quotation to commissioning, ensuring seamless integration of these custom solutions into your transformer systems.

Fan Control and Temperature Management Systems

Precision Control for Optimal Performance

STE Technic’s control systems ensure your transformer cooling operates at peak efficiency, adapting to varying conditions for maximum reliability.
  • Fan Control Systems: Automated systems to regulate fan speed and operation based on temperature and load.
  • Variable Flow Fan Applications: Dynamic airflow adjustments for energy-efficient cooling.
  • Temperature Control Systems: Integrated solutions to monitor and manage transformer temperatures in real time.
These systems provide flexibility and accuracy, helping you reduce energy consumption while maintaining transformer performance.

Transformer Cooling Radiators

High-Performance Radiators for Efficient Heat Dissipation

Our transformer cooling radiators are engineered to ensure optimal heat management for oil-immersed power and distribution transformers, meeting the highest industry standards.
  • Standard Radiators: Manufactured to EN 50216-06 and DIN 42559 standards, vacuum-proof and capable of withstanding 1 bar pressure at 100°C transformer oil. Panel width of 520 mm, with a 45 mm gap between panels, and lengths ranging from 800 to 3500 mm.
  • Custom Radiator Types: Available in various configurations, including normal, corner-cut (left or right), offset, graded (swanneck), and slanted designs, with 5 to 35 panels per radiator.
  • Material Options: Radiator panels are made from DIN 10130 DC01 CCR steel sheets (1.0 mm, 1.2 mm, or 1.5 mm thickness), with stainless steel options available upon request.
  • Corrosion Protection: Painted to EN ISO 12944 standards, with internal surfaces coated in transformer oil-resistant paint and external surfaces treated with galvanization or e-coating (KTL) for high-corrosion environments.
These radiators are designed for durability and efficiency, ensuring your transformers operate reliably in diverse conditions, from power grids to industrial applications.

Transformer Tanks and Components

Robust Solutions for Transformer Infrastructure

We supply a range of transformer tanks and components, designed for oil-immersed transformers up to 400 kV, to support the structural integrity and functionality of your power systems.
  • Flat Wall Tanks: High-capacity tanks for large power transformers, manufactured with precision welding (WPS and WPQR certified, EN 287-1 standards) and tolerances per ISO 2768-1.
  • Covers and Conservators: Durable covers and conservators to protect transformer oil and ensure proper expansion during operation.
  • Turrets and DOMs: Precision-engineered turrets and DOMs for secure electrical connections and oil management.
  • Oil and Air Cable Boxes: Robust cable boxes for safe and reliable electrical connections in oil-immersed transformers.
  • Piping and Cooling System Collectors: High-quality piping and collectors to support efficient oil circulation and cooling.
  • Core Clamps and Yoke Clamps: Sturdy clamps to secure transformer cores, ensuring stability during operation.
All components are sandblasted to SA 2.5 or SA 3 standards, painted to EN ISO 12944 specifications, and undergo rigorous leakage testing to ensure reliability in demanding environments

Impregnated Fiberglass Nets for Transformer Reinforcement

Robust Reinforcement for Power Transformers

We provide high-quality impregnated fiberglass nets, specifically designed for mechanical reinforcement in casting and impregnation systems within the electrical and electronics industry, with a particular focus on resin power transformers. These rigid, easy-to-apply nets ensure structural integrity and reliability in demanding applications.
  • MG1101 Impregnated Net: A fiberglass net impregnated with a modified epoxy resin, offering high thermal resistance and hot polymerization for superior durability. Available in a low-resin impregnation version for specific applications.
  • MG1102 Impregnated Net: Engineered with a fiberglass base and modified epoxy resin, this net provides excellent thermal resistance and rigidity, ideal for reinforcing resin power transformers. Also available in a low-resin impregnation variant.
  • MG1103 Impregnated Net: A high-performance fiberglass net with modified epoxy resin, designed for mechanical reinforcement in casting systems, ensuring long-term stability in resin power transformers.
These impregnated nets are perfect for enhancing the mechanical strength of transformer systems, ensuring reliable performance in high-voltage environments.