AVVG cable is a part that serves to distribute and transmit electric current in stationary installations to 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 AVVG cable specifications?
Appointment
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 multi-core. At the same time, the cores themselves are made of durable aluminum wire. Depending on the material used, parts are also distinguished 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 insulation elements. This is mainly PVC plastic, which insulates the surface of the wire from external factors. Cores can have digital (0, 1, 2, 3 and so on) and color (white, green, raspberry) markings. The first type of cable is used mainly on large wires with a cross section of 70 mm 2 .
Speaking about the insulation elements, it should be noted that the filling of PVC material is superimposed with the sheath of the wire at the same time and separates it from the external influences of the environment. For parts with a cross section of 16 square millimeters or more, non-woven fabric insulation is used. As a protective cover, a double layer of PET film and PVC film tapes are used here. In addition, galvanized tapes with a bituminous surface and PET films can be used in production. The shell is made of PVC compound.
AVVG aluminum cable and its technical characteristics
This type of wire is intended for use in a stationary state in environments with a temperature of air from –49 to +49 degrees Celsius. Moreover, the maximum humidity can reach 98 percent.
The maximum temperature at which the AVVG cable retains its conductor properties is +70 degrees Celsius. The maximum temperature for heating the wire conductors 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 the event of a short circuit with a core temperature of up to 160 ° C, the AVVG cable can retain its properties and not be deformed for 4 seconds.
Thus, the cable type AVVG is one of the best devices that conduct electric current, so it is used in all fire and explosive rooms, tunnels, shafts, cable racks and just outdoors.