Descriptions
The glassfiber winding tube are made of fiberglass reinforcement in a epoxy resin binder.Winding angle can be controlled between 30° and 90°. We can offer SF resistant treatment and different machining of punching,slotting,inner thread or outer thread,as well as flanger assembly service.It's widely used for hollow insulators,surge arresters,HV switches,current transformer and phase shifting rectifier transformers.
Features
High denity and mechanical strength.
Special treatment can be made on inner and outer surfaces on request.
The ID is between 50 and 1000 mm,the length 5-3000mm.
The series internal diameter of the glassfiber winding tube:
Outer diameter & Length could be made according to customers’ requirements.
Product Testing Standards:
As per the dye penetration test and water diffusion test method in GB19519 and IEC61109.
Technical Specification
|
Item
|
Uint
|
Value
|
|
Density
|
g/ cubic centimeters
|
≥1.9
|
|
Compression Strength
|
Mpa
|
≥200
|
|
Shearing Strength
|
Mpa
|
≥25
|
|
Bending Strength
|
Mpa
|
≥320
|
|
Bending Strength(Circumference)
|
Mpa
|
≥400
|
|
Air tightness
|
Gas pipe
|
Mpa
|
2.94
|
No leak
|
|
Oil pipe
|
58.8
|
|
Surface breakdown voltage after wettingin normal air for 1 min with gap between electrodes of 30mm
|
KV
|
≥15
|
|
Parallel to laminate breakdown voltage ( in transformer oil of 90±2ºC)
|
KV
|
≥25
|
|
Perpendicular to laminate breakdown voltage (in transformer oil of 90±2ºC,5min wallthickness 4mm )
|
KV
|
≥22
|
|
Dielectric loss factor 50 Hz
|
|
≤0.01
|
|
Leakage current (between gap of 500mm at 40 kv dc500mm40KV
|
MA
|
≤ 1
|
|
Content of fiberglass
|
%
|
70
|
|
Water absorbtion rate
|
%
|
≤0.02
|
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