The AVVG power cable with aluminum conductors and PVC insulation is used for transmitting electrical energy in stationary installations with a voltage of 0.66 and 1 kV.
VVG cable is a power cable designed for the transmission and distribution of electrical energy in stationary installations with a nominal AC voltage of 0.66 or 1 kV. It is used for installation in dry and damp rooms, special cable overpasses, blocks, and panels.
The main requirements for cables in this group are established by GOST 31996-2012 and ST AO 19938105-013-2008.
This group includes cables with aluminum or copper conductors, plastic insulation, and a plastic sheath, with or without protective coverings. They are designed for transmitting and distributing electrical energy in stationary installations at a nominal AC voltage of 0.66–1 kV with a frequency of 50 Hz. Cables in this group share similar structural designs, have one or more conductors within a common sheath, and do not have conductive screens over the conductors or insulation.
Power cables with rubber insulation are used for stationary installation in electrical networks with a voltage of up to 10 kV DC. These cables are designed for laying on routes with no restrictions on elevation differences (GOST 433-73). The advantages of rubber-insulated cables include low hygroscopicity (moisture absorption) and flexibility. However, rubber is not resistant to ultraviolet light and ozone, so the cable construction includes steel armor to protect it from damaging factors.
Power cables with PVC insulation are designed for stationary installation in electrical networks with a nominal AC voltage of 0.66 kV and 1 kV (GOST 16442-80). PVC-based insulation is one of the most affordable cable insulations, offering flexibility. With special additives, it can acquire necessary properties such as frost resistance and heat resistance.
Power cables with cross-linked polyethylene (XLPE) insulation emerged in the 1970s. XLPE-insulated cables were developed to replace outdated cables with impregnated paper insulation. These cables are rated for voltages of 6, 10, 15, 20, 30, and 35 kV (first group); 45, 60, 110, 132, and 150 kV (second group); 220 and 330 kV (third group). The cable cross-section ranges from 35 to 200 mm², with some products exceeding 1000 mm². Compared to paper-insulated cables, XLPE-insulated cables withstand higher conductor temperatures, are moisture-resistant, have a lower weight, and do not require preheating during winter installation. (Correction: XLPE cables also require preheating in winter. There are restrictions on installation depending on ambient temperature—below -5°C, special precautions are needed, and installation is prohibited at -25°C.)
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