AVVG cable: specifications and design

AVVG cable – part that is used for distribution and transmission of electric current for stationary installations in the nominal AC voltage. Often the concentration of electricity in it ranges from 650 to 1000 V. the frequency of the supply current can reach 50 Hz and more. Where used, this wire and cable AVVG specifications?

Purpose

A device used in power systems and serves as a kind of conductor between power source and consumer. Laid it under ground, sometimes under open sky or in cable channels. And if you consider the scope of the AVVG cable more, it is used almost everywhere, but only in those places where the possibility of damage and large tensile stress is reduced to zero.

About the design

AVVG cable can be both single-and multi-core. However, the cores are made from durable aluminum wire. Depending on the used material there are also parts with cross-sections from 2.5 to 240 mm (first class) or from 70 to 240 millimeters (second class). They are single-wire and stranded products.

In the design of the AVVG cable, there are also elements of exclusion. Basically it is PVC plastic, which insulates the surface of the wire from influences of external factors. Veins can have a digital (0, 1, 2, 3, and so on) and color (white, green, crimson) markings. The first type of cables is mainly used in large wires with a cross section of 70 mm².

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Speaking of the isolation elements, it should be noted that the filling of PVC material is overlaid with a sheath of the wire at a time and separates it from external environmental influences. For parts with a cross section of 16 square millimeters or more is used, the insulation of the nonwoven web. As a protective cover there is used a double layer of PET film and tapes of PVC tapes. In addition, the production can used galvanized strip with bituminous surface and PET film. The shell is made from plastic.

Cable AVVG aluminum and its specifications

This type of wire is intended for use in steady state in environments with air temperature from –49 to +49 degrees Celsius. The maximum humidity in the environment can reach 98 percent.

The Maximum temperature at which the AVVG cable retains its properties of the conductor is +70 degrees Celsius. Limit temperature of heating of tendons of cables in overload mode is equal to +80 degrees (if heating time is not more than 8-9 hours a day or 1 thousands of hours of work for the entire period of service). If a short circuit with the temperature lived up to 160 ^OC AVVG cable can maintain their properties and do not deform for 4 seconds.

Thus, the cable AVVG is one of the best devices conductive, so it is used in all flammable and explosive areas, tunnels, mines, cable racks and just outdoors.