Insulation enhancement system

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M974

(Overhead Line Silicone Rubber Cover, Overhead Line Insulation Silicone Rubber Sleeve)

 

Applications:

 

Widely used in substation protection works and railway catenary system, a significant effect in the cross-lines. To provide insulation and protecting for overhead line core cables, prevent short circuit accidents caused by incidental contact of tree branches or wildlife. Also used for railway contact network overhead line system, improve insulation performance to ensure the safe operation of railway line.

 

Features:

Design ease of installation. Use silicon rubber material, anti-aging, corrosion resistance, with good resistance to corona resistance, high temperature performance, especially suitable for the protection of the bare wire.


Technical properties:

Properties

Test   method

Typical   data

Electical strength Test

GB/T1408.1-2006

≥20kV/mm

Dielectric constant

GB/T1409-2006

2-3

Volume Resistivity

GB/T1410-2006

≥1X1014Ω•cm

Shore Hardness

GB/T 531

70   A

Before heat ageing



Tensile Strength

GB/T 528

≥4.0Mpa

Elongation at break

GB/T 528

≥200%

After Heat ageing(180,7d)



Tensile strength change

GB/T 528

±30%

Elongation change

GB/T 528

±30%

Low Temperature Elongation

(-15℃,2h)

GB/T 2951.4-1997

≥20%

Low Temperature Flexiblity

(-50℃,4h)

UL224-2004

No   cracks

High Temperature Crack Resistance(155℃,2h)

GB/T2951.61997

No   cracks

 

 

Dimensions:

Voltage-Ratings

Voltage(kV)

10kV

35kV

Thickness

2.0±0.3mm

3.0±0.4mm

 

 

Size

(mm)

Suitable   conductor section

(mm2)

Max.   conductor diameter

(mm)

8

16

6

10

25-35

8

12

50

10

14

70

12

16

95

14

18

120

15

20

150

17

22

185

19

24

240

22

28

300

25

32

400

29

35

500

32

38

630

35



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