WDUZBIN-YJY23-0.6/1KV-4*240+1*120额定电压0.6/1KV交联聚乙烯绝缘聚烯烃护套低烟无卤阻燃B1级低毒耐火电缆
The national mandatory combustion performance classification divides the combustion performance of the product into A, B1, B2 and B3. According to the flame spread characteristics, heat release characteristics and smoke production characteristics of the cable combustion, as well as the influence of the cable combustion on the surrounding environment (namely corrosion) and the interaction of the combustion droplet causing the fire of the surrounding environment, This paper comprehensively and objectively reflects the fire risk of cables under actual fire conditions, and better distinguishes the combustion performance of cables with different materials. In order to prevent the spread of fire, power cables with different combustion performance levels should be selected according to the use nature of the building and the difficulty of fighting fire when the design institute is designing and selecting cables.
Execution standard: GB/T 31247
Power cable of 0.6/1KV and below, control cable of 4507/750V and below, distribution cable of 450/750V and below
Long-term allowable operating temperature of conductor:
Crosslinked polyethylene insulation: The long-term operating temperature of the conductor shall not exceed 900C, and the maximum temperature of the conductor shall not exceed 2500C during short circuit.
The laying temperature of the cable should not be lower than -200C.
Allowable bending radius of cable:
Armored cable: Bending radius not less than 15 times of cable diameter (D).
Unarmored cable: Bending radius shall not be less than 20 times of cable diameter (D).
The ambient temperature of the cable should not be lower than 0 ° C.
