Wound composites products 2/2


Technical properties for epoxy glass roving tube (Reinforcing material glass)

 

Properties Test methods Units Value

Electrical characteristics

Dielectric strength normal to axis in oil at
90℃ (for d=3mm)

BS 6128/1-8 KV/mm 13 - 15

Dielectric strength parallel to axis in oil at
90℃ (for d=30mm)

BS 6128/1-8 KV/mm 3,5 - 4

Insulating resistance after immersion in water

BS 6128/1-13 Ohm 1.00E+13

Dielectric loss factor tgβ (1 MHz)

BS 6128/1-12 - ≤ 0,01

Dielectric constant at 1 MHz (Er)

BS 6128/1-12 - 3,9 - 4,5

Tracking resistance

DIN 53480 V KC 600

 

Mechanical characteristics

Tensile strength axial

BS 6128/1-15 MPa 250

Tensile E modulus

DIN 53 457 GPa 28

Flexural strength

BS 6128/1-14 MPa 200

Flexural modulus of elasticity

DIN 53457 GPa 10

Cohesion betwen layers

BS 6128/1-11 MPa 400

Compresive strength parallel with layers

BS 6128/1-15 MPa 180

Compresive strength normal with layers

BS 6128/1-15 MPa 350

Compresive modulus of elasticity

DIN 53454 GPa 13

 

Other characteristics

Density (nominal)

BS 6128/1-7 g/cm3 1,9 ÷ 2,0

Water absorption

BS 6128/1-10 mg/cm3 1,5

Departure from straightness (*)

BS 6128 mm 6-L2

Thermal classification

BS 1757 klass B,F,H

(*) L - length of the tube (or rod) in meters

 

The above FW tubes are used as electro insulation material in:

Tap Changers and High voltage Transformers (Hyundai Heavy Industry, Bulgaria)

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Transformer Loss Measuring System and Test Equipment for Instrument Transformer (Haefely Test AG, Switzerland)

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Control equipment for high voltage (Passoni & Villa, Italy)

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Transformers and test sets for high voltage applications (aggea-kull ag Switzerland)

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