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Spanish company seeks innovative solutions to replace or reduce free oil in their instrument transformers

Summary

Profile Type
  • Technology request
POD Reference
TRES20250711004
Term of Validity
11 July 2025 - 11 July 2026
Company's Country
  • Spain
Type of partnership
  • Commercial agreement with technical assistance
  • Research and development cooperation agreement
Targeted Countries
  • All countries
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General information

Short Summary
A Spanish company is seeking efficient alternatives to replace, reduce, or eliminate the free oil used in the instrument transformers, without affecting the core paper-oil insulation system.
Solutions must maintain electrical insulation, thermal stability, chemical compatibility, and be easy to implement.
Partners with ideas or expertise in advanced insulating materials or transformer design are sought for technical cooperation.
Full Description
A big Spanish company specializing in the manufacture of electrical equipment is looking for innovative solutions to replace, reduce, or eliminate the free oil currently present in their instrument transformers.
In these transformers, kraft paper impregnated with dielectric oil serves as the primary insulating layer. A chamber containing “free” or excess oil is used to ensure the oil impregnates all paper surface and to provide assembly tolerance.
The company seeks alternatives that minimize or eliminate the need for free oil, while preserving the essential paper-oil insulation.

Key requirements for proposed solutions are as follows:
• Do not affect the electrical insulation performance of dielectric oil.
• Demonstrate thermal stability with minimal volume change over a temperature range of -10°C to 40°C.
• Allow easy application during transformer assembly, considering variable internal volumes and tolerances across different models.
• Ensure chemical compatibility with existing dielectric oil and all transformer components (notably avoiding incompatibilities with rubbers, polymers, PVC, silicone, coatings, adhesives, etc.).
• Exhibit low moisture absorption to preserve insulation integrity and extend equipment lifespan.
• Preferably be biodegradable or have a lower environmental impact than current oils.
• Minimize or avoid changes to the existing transformer design and components.

Evaluation criteria (in order of importance):
• Highest reduction in free oil volume and environmental impact.
• Lowest impact on material and assembly costs.
• Least modification required to existing transformer design and components.

Excluded approaches:
Solutions based on gas insulation are not of interest, as they are already covered in the company’s product catalogue.
Advantages and Innovations
• Opportunity to introduce materials engineering solutions or innovative design concepts in a critical energy sector application.
• Potential to reduce environmental impact by minimizing or eliminating oil use.
• Simplification of transformer assembly and reduction of compensation system complexity.
• Enhanced safety and reliability by lowering the risk of oil leaks and associated failures.
• Access to funding and collaboration with a leading manufacturer in the energy sector.
Technical Specification or Expertise Sought
• Engineering capacity and ability to demonstrate electrical, thermal, and chemical performance of proposed materials or systems.
• Ability to participate in pilot testing and provide technical documentation.
Stage of Development
  • Under development
Sustainable Development Goals
  • Goal 17: Partnerships to achieve the Goal
  • Goal 9: Industry, Innovation and Infrastructure
  • Goal 13: Climate Action
  • Goal 8: Decent Work and Economic Growth
IPR status
  • No IPR applied

Partner Sought

Expected Role of a Partner
• Material suppliers, technology developers, R&D centers, or engineering firms with proven solutions or innovative concepts for transformer insulation.
• Partners able to co-develop, adapt, or pilot solutions in collaboration with the requesting company.

Expected role of the partner:
• Propose and adapt the solution to the specific requirements of instrument transformers.
• Participate in pilot testing, feasibility analysis, and business case development.
• Collaborate in scaling up and potential commercialization.
Type and Size of Partner
  • SME 50 - 249
  • SME 11-49
  • R&D Institution
  • Big company
  • SME <=10
  • Other
  • University
Type of partnership
  • Commercial agreement with technical assistance
  • Research and development cooperation agreement

Dissemination

Technology keywords
  • 04001004 - Transmission of electricity
  • 03004004 - Electrical Engineering/ Electrical Equipment
  • 04002005 - Generators, electric engines and power converters
Market keywords
  • 09008001 - Electric companies
Targeted countries
  • All countries