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SynTherm® – Insulating Materials

SynTherm® NPN/80

SynTherm® NPN/80 is a flexible 3-ply insulation consisting of a polyester film with a calandered Nomex® layer with green strips.

Attributes

The proven dielectric properties of the polyester film and the excellent mechanical and thermal properties of the outer Nomex® layers result in a high performance insulating material. The ability of the outer layers to absorb impregnants results in exceptional bonding between all winding components.

Application

SynTherm® NPN/80 is a cost-effective insulating material which can be installed in suitable insulating systems of class H (180 °C) and is used in electric motors as slot insulation, phase and wedges. SynTherm® NPN/80 is used as core, interlayer and final insulation for transformers.

Standards
  • Suitable for class H (180 °C) systems
  • Insulating material acc.IEC 60626
  • UL approved, e.g. E247773
  • RoHS compliant acc. 2011/65/EC
  • Test standard IEC 60626-2
  • Sample conditioning acc. to standard atmosphere 23/50
Delivery forms

Total thickness in μm:
220, 250, 300, 360, 420, 480

SynTherm® NPN/80 can be supplied:
in slit rolls from widths of 6 mm (depending on thickness)  and above
in rolls approx. width of 900 mm
in sheets on request: approx. 600 x 900 mm, 900 x 1000 mm

Optional overall diameter of the slit rolls/ rolls
approx. 240, 330 or 450 mm.

Feathering:
depth approx. 1 - 12 mm, distance approx. 1 - 10 mm
from widths of 10 to 240 mm and thickness of 0.20 mm

Base

PET-film + calandered Nomex® layer on both sides

Technical data
Mechanical
Total thickness  Thickness tolerance max.  Film thickness  Nomex® paper thickness  Specific weight  Tensile strength longitudinal*  Tensile strength transversal*  Elongation at break longitudinal*  Elongation at break transversal* 
Unit of measure            
mm  0.22 0.25 0.30 0.36 0.42 0.48
± 15 ± 15 ± 15 ± 15 ± 10 ± 10
µm  50 75 125 190 250 300
µm  80 80 80 80 80 80
g/m²  220 255 325 420 500 570
N/mm²  90 90 90 100 100 100
N/mm²  80 80 80 95 95 95
10 20 20 20 20 20
20 25 25 25 25 25
Electrical
Total thickness  Dielectric strength (unfold) 
Unit of measure            
mm  0.22 0.25 0.30 0.36 0.42 0.48
kV  10 12 16 23 26 28

SynTherm® is a registered trademark of SynFlex.
Nomex®, Kapton®, KAPTON® are registered trademarks of E.I. Du Pont de Nemours and Company.