Cut Sheet
3M’s materials for transformers are proven in applications to eectively insulate, protect, connect and
identify critical components in a broad range of electrical transformers. Use this guide to see where 3M
solutions can help protect your transformer products.
3M™ Electrical Insulating Tapes and Electrical Flexible Insulation oer a broad range of solutions for
dry-type transformers. These solutions include both minor and major insulation for ground, layer, interwinding
and conductor wrap applications, and have been tested and approved for use in many UL 1446 Electrical
Insulation Systems.
To meet the specic requirements for each application, these insulation solutions have been optimized for
dierent transformer congurations and requirements.
3M Electrical Tapes are fabricated with a broad range of backings and adhesives for the optimal balance of
electrical and mechanical properties while maintaining good handling characteristics. 3M Flexible Insulations
have been designed to dierent levels of thermal, electrical and mechanical performance to meet the
appropriate transformer requirements with the most cost eective solutions that meet the stringent quality
requirements.
High Thermal Conductivity
• Lower temperature rise with existing design
or
• Smaller designs
Two identical 75 kVA coils;
One with 3M
TM
Insulation and
one with calendared meta-aramid
Benets
• Cooler transformers are more ecient with greater overload protection
• Reduced conductor material costs
3M™ Insulations enable dry-type transformers to
operate cooler or be smaller with low total cost
Smaller Coil Size
Shorter Conductor Length
Lower Conductor Cost