VVGzng – power cable with copper conductors and insulation made of PVC. The shell of the cable is made of PVC with low flammability zapolneniem.Konstruktsiya Underlying Copper cable is conductive solid or stranded live round or sector shape. Once upon a consistent 1 or Class 2 Standard 22483. Conductor insulation is made of polyvinyl chloride (PVC) plastic. As a rule, multi-strand cables, each isolated vein has a different color or a number, which is placed by printing or stamping (digit height 4 mm, the distance between the numbers – up to 35 mm). Zero veins usually have a light blue or blue insulation, and grounding wires – yellow-green. In multi-strand cable is twisted cores. Filling and cover – of PVC reduced goryuchesti.Tehnicheskie and operating characteristics of the power cable VVGzng can be operated at a temperature of -50 C to +50 C and humidity up to 98% at +35 C.
Long-term allowable temperature of the heating cables in the living the process of costavlyaet +70 C. Short circuit duration up to 4 with the maximum permissible temperature of living should not exceed +160 C. In emergency mode allowed heating cables must be lived no more than +80 C. The duration of the cables must be at least 8 hours a day, but not more than 1,000 hours of life. Lay cable VVGzng recommended at temperatures below -15 C (without preheating).
At The minimum bending radius should not exceed 7.5 of its outer diameter. Rated frequency cable VVGzng is 50 Hz. Test ac voltage at 50 Hz voltage 0.66 kV – 3 kV to 1 kV – 3.5 kV. Guarantee period – 5 years from the date of commissioning. The service life of up to 30 VVGzng let.Sfera VVGzng of cables used for power transmission and distribution in fixed installations in rated voltage of 660 V and 1000 V at 50 Hz. As a rule, they are laid in dry and wet production areas, on cable racks, and in subway systems in nuclear power plants outside of containment. Also, cables VVGzng used for electrical power, requiring the sealing of cables in the electrical input.