The NPN flexible insulation is obtained by laminating Nomex® paper (or aramid paper) on both sides of the polyester film. As for the NP laminate, the presence of polyester improves the mechanical and physical properties while the aramid paper works on the dielectric properties of the laminate with operating temperatures up to class F 155°C and class H 180°C thanks to the use of glues with high performance.
The NPN laminate represents a high performance solution for the insulation of electric motors, transformers and electric machines. In motors, or more generally in rotating machines, it is used to insulate the slot and close it (small tile), as well as to separate the phases on the winding heads. In transformers and other static electrical machines it is used as an interlayer insulator.