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Fiberglass Winding Tube

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:
Φ47、 Φ57、φ60、φ64、φ66、φ76、φ83、φ92、φ100、 Φ103、φ110、φ135、Φ145、φ170、φ176、φ188、φ190、Φ220、φ240、Φ248、φ325、φ370、Φ400、φ500

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