Brief harakteristikKabel power VVGng-LS is designed for power transmission and distribution in fixed installations for rated voltage of 660 V and 1000 V at 50 Hz. Wire, flame retardant and having low smoke and gas evolution, is used in cable installations and premises, including the systems of nuclear power plants of classes 2, 3 and 4 classification OPB-88/97 (PNAE G-01-011-97). Cable Construction VVGng-LSKabel VVGng-LS comes with a copper conductive housing – single or multiwire, round or sector shaped, 1 or Class 2 according to gost 22483. Cable insulation VVGng-LS is made of pvc plastic low flammability. Insulated conductors are two-, three-, four-core cables are odometer. Two-and three-core cables are available with conductors with same cross section, four-core may have a smaller cross-section conductor (ground or zero). Insulated conductors cables are distinctive coloring: zero – blue veins of earth – two-color, greenish-yellow. By twisted isolated veins superimposed extruded inner sheath pvc compound low flammability.
It fills all the gaps between the strands. Cables with sector conductors can be manufactured without an inner shell, but then on top of twisted cores should be imposed with the overlap, one or two strips of polyethylene terephthalate film or thermobonded canvas. Outer sheath VVGng-LS is made of PVC-compositions of reduced flammability. In wires with a section of round conductors up to 16 mm2, the imposition of the outer shell can be combined with filling the gaps between the strands. Inner extruded shell in this case is not imposed.
Technical and Operating harakteristikiKabel power VVGng-LS operated at temperatures ranging from -30 C to +50 C, with relative humidity (at temperatures up to +35 C) to 98%. In operating mode, the maximum allowable long-term core heating temperature of the cable is +70 C, short-circuit limiting temperature conductors cables on the condition cable + 400 C. Cables VVGng-LS for 10 min. stand the test of variables 3 kV and 3,5 kV cable with an operating voltage of 660 V and 1000 V respectively. At or below -15 C laying and installation of wires can be conducted without preheating. The minimum bend radius when installing single-core cables is 10 Dn, strands – 7,5 Dn (Dn – outer cable diameter). Building length of cables for the main sections of cores: from 1,5 to 16 mm 2 – 450 m from 25 to 70 mm 2 – 300 m of 95 mm2 and above – 200 m. The warranty period VVGng cable-LS – 5 years period service – 30 years. Scope primeneniyKabel power VVGng-LS is used in dry and wet production areas, facing higher fire safety requirements, to an altitude of 4300m above sea level. Cable used in power plant systems, including emergency power supply systems for laying inside a sealed area of the reactor compartment. Wire VVGng-LS paved in blocks and special cable racks, laying in the ground or the trenches are not recommended.