Epoxy Glass Fiber Winding Insulation Cylinder

Epoxy Glass Fiber Winding Insulation Cylinder

Description

Epoxy Glass Fiber Winding Insulation Cylinder

 

Applications and Features:

This product is widely used as the main insulation for high-voltage products such as dry-type transformers, railway locomotive transformers, on-load tap changers, reactors, surge arresters, SF6 transformers, and test equipment. It features high dielectric strength, low dielectric loss, low partial discharge, high mechanical strength, no deformation or delamination, minimal water absorption, and resistance to chemical corrosion.

 

Technical Performance:

Test Performance/Items

Unit Quality Index Test Method

Density

g/cm³

1.90

GB/T23100-2008

Water absorption

%

0.08

Vertical layer to electrical strength(90℃±2℃,25# transformer oil, 20s step by step boost)/

KV/mm

10

Dielectric loss factor(50Hz)

—— ≤5.0×10-2
Relative permittivity(50Hz) ——

5.2±0.2

Partial discharge(Parallel layer direction, 23 ° C ±2 ° C,25# transformer oil, 7.5KV local discharge at a fixed voltage)/

pc ≤ 5
Surface voltage resistance after wetting (40℃±2℃/RH93%±2%/96h, width 25mm aluminum foil, electrode spacing 25mm,12KV,5min)/ ——

OK

Insulation resistance after immersion

Ω >1.0×109 GB/T1410-2006
Volume resistivity Ω . m 3.3×1014

GB/T1410-2006

Vertical laminar bending strength

MPa ≥200 GB/T5132.2-2009

Axial compressive strength

MPa

>160

GB/T5132.2-2009

Axial shear strength MPa >32

JB/T8150-1999

Tensile strength MPa >180

GB/T1040.1-2006

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