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Protective cover and Maintenance tool
      Promulgator :LX      Time:2019-03-25
Protective cover

       The material of protective cover is PVC. It can meet the related standard of fuel materials which stipulated in GB/T2408 – 1996. It has characteristics of ultraviolet resistance, ageing resistance, and it is suitable used for the environment of underground tunnel. Protective cover uses the work processes of mould extrusion and punching. The final formed products have the characteristics of good balanced quality, stable performance and smooth surface, etc.

 

S/N
Description
Unit
Target
1
Electrical resistance by Volume
Ωm
≥1012
2
Power frequency dry enduring voltage
kV
≥60
3
Power frequency wet enduring voltage
kV
≥30
4
Bending strength
MPa
≥50
5
Degree of cure
%
≥95
6
Strength of electric breakdown
kV/mm
≥6
7
Enduring Tracking
V
PTI600
8
Water absorption
%
≤0.2
9
Resistance of flammability
Grade
FV-0
10
Density
kg/cm3
1.9×103
11
Coefficient of linear expansion
1/℃
7~10×10-6

Maintenance tool

       Maintenance tools are used to connect conductive rail of contact rail with grounding rail when line is examined and repaired and then makes contact rail uncharged. This is easy to maintain the related.


 
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