Reliable insulation for more reliable transformers.
3M’s materials for transformers are proven in applications to effectively 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 offer a broad range of solutions for dry-type transformers.
Wire-Wound Transformer The material interleaved between successive layers of an insulated conductor in the same winding. Used in a mechanical application only, and does not serve as electrical insulation.
Foil-Wound Transformer • If used as a Major Insulation, must be able to pass Hi-pot testing • Mechanical strenth to protect wire windings • Cosmetic function • Temperature class • For UL Systems, must meet EIS minimum thickness requirement • Sufficient dielectric strength to pass Hi-pot test • Mechanical strength to resist cut through if wire is used in outer winding (Wire wound over Hi-Low barrier is often pounded into shape) • For UL Systems, must meet EIS
HID and Microwave Transformers Bobbin-Wound Transformer HID and Microwave Transformers Applicable 3M™ Flexible Insulation Acrylic Core Tube/ Ground Insulation Insulation that is wrapped around bobbin or core. May also be supplied as preformed tube. [It is major when it is the sole insulation between windings and grounded or dead metal.
Planar Transformer Planar Transformer Acrylic Polyimide Epoxy Acrylic Rubber Rubber Acrylic Filament Reinforced Rubber Polyester ThermaVolt AR Acrylic ThermaVolt Rubber TufQUIN CeQUIN Polyester Composite Appropriate 3M™ Insulating Tape* Applicable 3M™ Flexible Insulation** *Available with or without adhesive. **All are minor insulation. Find out more about 3M solutions for your transformer applications. Call 1-800-676-8381 or visit www.3M.com/oem.
