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Slot Wedges: Spinduwedge F; Spinduwedge H; Spinduwedge Epoxy; Spinduwedge Polyester
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SPI News

SPI starts Operations in the USA (De Leon Springs)

Date: 12.10.2007

New Production Site in Hungary (Mosonmagyarovar)

Date: 05.10.2007

Planning for new Headquarters started

Date: 28.09.2007

New Managing Director - Motor Department

Date: 21.09.2007

SPI increases Presence on european Market (Slotwedge)

Date: 14.09.2007

New Sales Director - Slotwedge Department

Date: 07.09.2007

Additional Production Hall + Lab built (Slotwedge)

Date: 01.09.2007

Product Information

Spinduwedge GPO

Glass Polyester Wedge - above Temperature Class F

Properties
Spinduwedge GPO slotwedges made from Polyester glass mat with excellent mechanical and electrical properties up to high temperatures (Temperature index 160°C).

Typical Application
Slot wedge, used as slot Closure for electrical motors.

Technical Data:
Flexural strength   perpendicular to lamination 23°C 150 MPa
Flexural strength   perpendicular to lamination 130°C 90 MPa
Tensile Strength 55 MPa
Compressive Strength   perpendicular to lamination 230 MPa
Notched Impact Strength IZOD Method (10mm) 4,7 KJ/m2
Insulation Resistance 3x1012   Ω
Electric Strength perpendicular to lamination 17 KVmm
Edgewise breakdown voltage (Taper pin electrodes) 47 KV
Dissipation Factor 50 Hz 0,013
Relative permittivity 50 Hz 4,1
Comparative tracking index 600 V
Arc resistance 180 s
Density 1,7 -2,0     g/cm3
Water Absorption ISO 62 30 mg
Coefficient of linear expansion 2,7 x10-3    W/cm.K
Flammability UL94 94V-O
UL Temperature Index (Electrical/Mechanical) 130/160
Classification NEMA GPO-3

Download Datasheet

Please click on the following Link to download the Datasheet in English

SPINDUWEDGE GPO - F

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Usage of Slotwedges

Image description

Slot Wedges made of either magnetic or nonmagnetic Material used as Slot Closures to hold the stator windings in the slots formed between the stator teeth.

Slot wedges made of magnetic material are a significant means to improve the efficiency of a motor or generator. Magnetic slot wedges reduce slot ripple in the air gap flux caused by the changing reluctance due to the slots, and also reduce the associated eddy current losses due to the interaction of the harmonics in the air gap flux with the conducting surface of the rotor.

The magnetizing current required in the stator windings to generate the desired air gap flux is less with magnetic slot wedges, since more of the air gap flux is available for useful power production.

Further, our magnetic Slot wedges are not produced from Sheets which means a massive Improvement since cutting and grinding of Sheets with High Glass Content has a Major Impact on Health.

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