Dry Type Transformers served by SIDA
High-performance insulation materials for Wet & Dry Transformers
Insulation Materials for Dry Transformers
Dry transformers require insulation systems that can perform reliably under different cooling conditions, thermal stresses, and humidity levels. while in dry-type transformers, materials must withstand air cooling, higher temperatures, and mechanical vibration.
Applications
Flexible composite materials, insulation tapes, and mica products protect transformer windings from electrical breakdown and heat buildup.
Laminated wood sheets, rigid laminated sheets, and pressboard insulate the magnetic core and supporting frame to prevent short circuits and vibration.
Presspaper and flexible composites are used between winding layers to prevent partial discharges and maintain dielectric strength in both oil and air environments.
Insulation sleeves, cords, and non-metal threaded rods protect high-voltage leads and connections from arcing, heat, and mechanical vibration.
FAQs
What are the key differences in insulation between wet and dry transformers?
Wet (oil-immersed) transformers use oil-compatible materials like pressboard and presspaper for dielectric and cooling functions, while dry-type transformers rely on air-cooled insulation such as flexible composites and mica for heat resistance.
Which insulation materials are best for dry-type transformers?
For dry systems, mica materials, aramid-based composites, and rigid laminated sheets perform best due to their high-temperature endurance and excellent dielectric stability.
How do insulation materials prevent moisture and oil absorption?
Materials like pressboard and epoxy-coated laminates feature low permeability, ensuring moisture resistance and consistent dielectric performance over time.
Can SIDA materials be used for both AC and DC machines?
Yes, our insulation solutions are designed for both AC and DC applications, including synchronous and induction motors, as well as alternators and generators. Each material offers tailored dielectric and mechanical properties for reliable operation under different electrical loads.