AVVG-cable: specifications and design

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

AVVG-cable is a part that serves to distribute and transmit electric current in stationary installations to a rated alternating voltage. Often, the concentration of electricity in it ranges from 650 to 1000 V. In this case, the frequency of the current supply can reach 50 Hz or more. Where is this wire used and what are the specifications of the AVVG cable?

Destination

This device is used in power supply systems and serves as a kind of conductor between the current source and the consumer. It is laid underground, sometimes in the open air or in cable channels. And if we consider the scope of the AVVG cable in more detail, then it is used almost everywhere, but only in those places where the possibility of damage and large tensile forces is reduced to zero.

About design

AVVG-cable can be either single or stranded. At the same time, the cores themselves are made from durablealuminum wire. Depending on the material used, there are also parts with a cross section from 2.5 to 240 millimeters (first class) or from 70 to 240 millimeters (second class). They are single-wire and multi-wire products.

In the design of the AVVG cable, there are also elements of insulation. Basically, it is PVC plastic, which isolates the surface of the wire from external factors. The cores can have digital (0, 1, 2, 3, and so on) and color (white, green, crimson) markings. The first type of cable is used mainly on large wires with a cross section of 70 mm or more2.

Speaking of the insulation elements, it should be noted that the filling of PVC material is superimposed with the wire sheath at the same time and separates it from external environmental influences. For parts with a cross section of 16 square millimeters or more, non-woven fabric insulation is used. A double layer of PET film and PVC film tapes is used here as a protective cover. In addition, galvanized tapes with a bituminous surface and PET films can be used in production. The sheath is made of PVC compound.

AVVG aluminum cable and its specifications

This type of wire is intended for use in a stationary state in environments with air temperature from -49 to +49 degrees Celsius. At the same time, the maximum humidity of the environment can reach 98 percent.

The maximum temperature at which the AVVG cable retains its conductor properties is +70 degreesCelsius. The maximum heating temperature of the conductors of the wire in overload mode is +80 degrees (provided that the heating duration is not more than 8-9 hours per day or 1 thousand hours of operation for the entire service life). In case of a short circuit with a core temperature of up to 160 oC, the AVVG cable can retain its properties and not deform for 4 seconds.

Thus, the AVVG type cable is one of the best devices that conducts electric current, so it is used in all fire and explosion hazardous rooms, tunnels, mines, cable racks and just outdoors.