Pultruded Slot Wedge

It is suitable for securing stator and rotor windings in F- and H-class motors, including traction, metallurgy, heavy-duty,aerospace, and general industrial motors.

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insulation Material

Category:

Pultrusion Series

Slot Wedge Series

Wind power generation

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Product Description

Product Applications

Product Description:

Pultruded Slot Wedge is manufactured by impregnating alkali‑free glass fiber yarn—specifically for electrical applications—with a heat‑resistant resin, followed by pultrusion and curing in a dedicated mold.

The insulation heat resistance level can reach Class F and Class H.

Performance characteristics: Pultruded slot wedges exhibit excellent mechanical and dielectric properties, while also offering flame retardancy, chemical resistance, radiation resistance, arc resistance, and dimensional stability.

Main applications: Suitable for securing stator and rotor windings in F‑ and H‑class motors, including traction, metallurgical, heavy‑duty, aerospace, and general‑purpose electric motors.

Performance Specifications of Pultruded Slot Wedge

No.	Indicator Name	Unit	Indicator value
1	Density	g/cm3	≥1.7
2	Water absorbency	%	≤0.5
3	Surface withstand voltage (12 kV, 1 min)	-	No breakdown, no flashover
4	Flexural strength	MPa	≥340
5	Compressive strength	N/10mm	≥600
6	Thermal stability (200°C, 24 h)	-	No delamination, no cracking.
7	Flame retardancy (Glow-wire test method, 960℃ ± 15℃, 30 ± 1 s)	-	Qualified
Note: The anti-splitting strength listed in the table applies only to pultruded slot wedges; it is not required for laminated slot wedges.