- Construction
- Operating environment
- Application area
Construction
Power cable type ASB has the following design:
- conductors are aluminum, can be round or sectoral, multiwire and single-wire;
- type of insulation( including belt) - impregnated with a viscous composition paper;
- sheath lead;
- pillow from bitumen, crepe paper or polyethylene terephthalate fibers;
- booking - steel bands;
- outer covering - bitumen and glass yarn;
- cross-section of conductors from 35 to 240 mm2.
- the marking of cores can be color or digital( from 1 to 4).
You can see the design of the ASB power cable on the photo below:
Operating Conditions
The main technical specifications are:
- Operating voltage 1, 6 or 10 kV.
- Frequency of alternating current 50 Hz.
- Operating temperature -50 to +50 ° C, with the maximum permissible value is + 70 ° C, if the rated voltage is 10 kV and + 80 ° C for a cable rated for 1 or 6 kV;
- Maximum temperature of heating of conductors with short-circuit: + 200 ° С, with overload mode - + 90 ° С.
- Laying is allowed at a temperature not lower than 0 ° С.
- Minimum bending radius 25 outer diameters for single-wire cores and 15 for multiwire.
- Specific resistance of conducting conductors per 1 km of cable length at + 20 ° C is not less than 29.11 ohms for single-wire cores and at least 29.4 ohms for multiwire conductors.
- Specific insulation resistance per 1 km of length at a temperature of +20 ° C of not less than 100 MΩ for an ASB cable designed for 1 kV and 200 MΩ for 6 and 10 kV.
- Service life 30 years.
We have considered the technical characteristics of the ASB cable as weight and outer diameter in the table:
Scope of application
The main purpose of the ASB cable is the transmission of electrical energy in stationary installations of power grids with a working voltage of 1, 6 and 10 kV.The armored conductor can also be used for power transmission in networks with direct current. Most often power cable type ASB is used when laying electrical wiring in the ground.
We draw your attention to the fact that the soil should have low or medium corrosive activity when using the ASB and ASBL brands. At a high corrosive activity it is necessary to use the brand ASB2l. This is the main difference between several types of cable.
An important condition for the operation of the conductor - when laying it, there should be no stray currents in the ground, and the cable must not be stretched. To see how the conductor is laid, you can on the video below:
The most popular markers of the ASB power cable are 3х70;3х95;3х120;3х150;3х185;3х240; .If you are looking for an analogue of a conductor, it is better to choose brands with such names as CACIB or ASBSS.
As for the manufacturers, such manufacturers as the Kamkabel LLC, Kavkazkabel CJSC, ZAO Moskabel Plant and LLC GK Sevkabel are considered the most reliable for today.
Prepared by the site http://vse-elektrichestvo.ru/
It will be interesting to read:
- Fire extinguishers for extinguishing electrical installations
- Labeling of wires by colors
- How to choose an electrical shield?
