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SynTherm® – Insulating Materials

SynTherm® NPN/50

SynTherm® NPN/50 is a flexible 3-ply insulation consisting of a polyester film with a calandered Nomex® layer with yellow 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/50 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 insulation and wedges. SynTherm® NPN/50 is used as core, interlayer und final insulation for transformers.

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

Total thickness in μm:
130, 160, 180, 220, 240, 310, 370, 410, 470

SynTherm® NPN/50 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 or 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 0.24 mm
Base

PET-film + calandered Nomex® 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  0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47
± 15 ± 15 ± 15 ± 15 ± 15 ± 15 ± 10 ± 10 ± 10
µm  23 50 75 100 125 190 250 300 350
µm  50 50 50 50 50 50 50 50 50
g/m²  135 170 200 230 270 360 450 520 590
N/mm²  90 95 95 100 100 100 100 100 100
N/mm²  60 80 90 90 90 100 100 100 100
15 15 20 20 20 25 25 25 25
20 30 40 40 40 50 50 50 35
Electrical
Total thickness  Dielectric strength* 
Unit of measure                  
µm  0.13 0.16 0.18 0.22 0.24 0.31 0.37 0.41 0.47
kV  8 10 12 15 18 20 26 27 29

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