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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.
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Electrical resistance by Volume
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Power frequency dry enduring voltage
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Power frequency wet enduring voltage
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Strength of electric breakdown
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Resistance of flammability
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Coefficient of linear expansion
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