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Home  »  Products  »  Fiberglass Products » Epoxy Winding Tube
 

Main Features of Epoxy Winding Tube:

1. Winding technology

2. Superior mechanical strength.

3. Excellent electrical insulation performance.

Inner Diameter Scope of Epoxy Winding Tube: (Outer Diameter and Length can be made on request)

20, 23, 24, 26, 30, 32, 36, 38, 40, 43, 47, 48, 50, 54, 55, 56, 57, 60, 63, 64, 65, 66, 68, 70, 73, 76, 77, 80, 83, 90, 92, 100, 102, 103, 110,135, 140, 145, 146, 160, 170, 176, 188, 190, 198, 210, 230, 240, 248, 260, 268, 270, 290, 300, 310, 320, 325, 340, 350, 360, 370, 380, 390, 400, 410, 500, 520, 550

Application reference of Epoxy Winding Tube:

Winding Tubes are mostly used in Hollow Insulator & Bushing, surge arrester, high voltage switch, transformers.

Technical Specifications

No.

Description

Unit

Value

1

Density (20±2℃)

g/cm3

≥1.9


Water Absorption

%

≤0.15

2

Bending Strength

MPa

≥320

3

Compressive   Strength

MPa

≥200

4

Shearing   Strength

MPa

≥25

5

Dielectric   Dissipation Factor

-

≤0.01

6

Dielectric   Constant

              -

3~6

7

Volume   Resistivity

Normal Condition

Ω·m

≥1.0 × 1011

Water Absorbed

≥1.0 × 109

8

Insulation   Resistance

Parallel to   Layers

Normal Condition

Ω

≥1.0 × 1011

Water Absorbed

≥1.0 × 109

9

Surface   Withstand Voltage

(spacing 30mm in   air for 1 min)

kV

14

10

Withstand   Voltage Vertical to Layers

in oil 90±2   transformer oil for 5 min

kV

18/20

11

Withstand   Voltage Parallel to Layers

in oil 90±2   transformer oil for 5 min

Spacing

25mm (kV)

≥25/50/75

12

Insulation   Resistance

Ω·m

≥5 × 104

13

Power Frequency   Withstand Voltage

Oil chamber of OLTC   to earth

In Transformer   Oil for 5min, 100mm

kV

≥85

 


 
 
 
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