A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In this test, PVC insulated wire is connected to self-made large current generator, so that different high-multiple overload currents (3Ie, 3.5Ie, 4Ie, 4.5Ie and 5Ie) passes through, with the increase of overload time, observe the change of insulation material of wire and ignition situations of different combustible substance (paper scrap, absorbent cotton and fire-retardant pipe). The results show that the higher the overload multiple, the larger the ignition capability of wire to combustible substance; even though it takes short time for fire-retardant pipe to smolder, but it takes longer time for fire-retardant pipe to become burned black and fail, and both cases are free from ignition, therefore, in case there is no collapse or burn-through, a certain degree of fire retardation is available in fire-retardant pipe in comparison with other two combustible substances.
In this test, PVC insulated wire is connected to self-made large current generator, so that different high-multiple overload currents (3Ie, 3.5Ie, 4Ie, 4.5Ie and 5Ie) passes through, with the increase of overload time, observe the change of insulation material of wire and ignition situations of different combustible substance (paper scrap, absorbent cotton and fire-retardant pipe). The results show that the higher the overload multiple, the larger the ignition capability of wire to combustible substance; even though it takes short time for fire-retardant pipe to smolder, but it takes longer time for fire-retardant pipe to become burned black and fail, and both cases are free from ignition, therefore, in case there is no collapse or burn-through, a certain degree of fire retardation is available in fire-retardant pipe in comparison with other two combustible substances.
Research on Overload Ignition Characteristic of Copper Wire
Wu, Ying (author)
2013
6 Seiten
Conference paper
English
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