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Tianjin Cable Factory First Branch
MBM coal mine flame retardant blasting busbar
NegotiableUpdate on 04/11
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Overview
The flame-retardant blasting busbar conductor used in MBM coal mine should be tinned, and the surface of the conductor should be smooth. The stranded wire in the conductor should be twisted in the same direction as when twisted again, and the outer layer should be twisted in the left direction. At 20 ℃, the resistance of each core conductor should meet the requirements of the fifth conductor in GB/T 3956
Product Details
MBMExecution standard for flame-retardant blasting busbar used in coal mines:MT/T930-2005
MBMTechnical requirements for flame-retardant blasting busbar used in coal mines:
1:The conductor should be tin plated, and the surface of the conductor should be smooth and clean,The stranded wire in the conductor is twisted in the same direction as when twisted again, and the outer layer is twisted to the left, twentyAt ℃, the resistance of each core conductor should comply withG B/T 3956pass the civil examinations 5 Requirements for planting conductors.
2:The average insulation thickness should not be less than the nominal value The thickness at the thinnest point should not be less than the nominal value90 %one0.1mm, 20The insulation resistance at ℃ should not be less than16O MΩ.km
3The twisted joint diameter ratio of the cable core shall not exceed 10 .
4The outer layer of the cable core must be extruded with a protective sheath:The sheath is a single-layer structure.
5The busbar should withstand5 m in,/5.0 kVPower frequency voltage test without breakdown.
6：MBM coal mine flame retardant blasting busbarThe flame retardant performance should reachM T 386The various test requirements in the standard, among which the height of the carbonized part after the bundle combustion test should not exceed:pass2.0 m .
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