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Wires And Cables

August 12, 2017 18:07

Power cable ASB

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cable ASB is interpreted as follows: "A" - aluminum conductors, "C" - sheath lead, "B" - the additional protection provided steel strips.There are also brand and type ASBl ASB2l.Explanation marking in this case is only the only difference is that the "L" means the additional layer bitumen strip which is under the armor.Below we look at the main specifications of the cable ASB and its field of application.

Contents:
  • design
  • Operating conditions
  • Scope

design

Power cable type ASB has the following structure:

  • threads, aluminum, can be round orsector shaped, stranded or solid;
  • type of insulation (including the belt) - impregnated with a viscous compound paper;
  • lead sheath;
  • theft of bitumen, crepe paper or the polyethylene terephthalate fibers;
  • booking - steel tape;
  • outer covering - bitumen and fiberglass;
  • transverse cross section from 35 to 240 mm2.
  • core identification can be color or same numeric (1 to 4).

See construction of the power cable of the brand CRSs can in the photo below:

conductor device

Operating conditions

Main specifications is:

  • Operating voltage 1, 6 or 10 kV.
  • Frequency AC 50 Hz.
  • Operating temperature -50 to + 50 ° C, while the maximum permissible value of + 70 ° C, if the rated voltage of 10 kV and 80 ° C for cable, designed for voltage of 1 kV or 6;
  • maximum heating temperature of conductors at short circuit + 200 ° C, under overload conditions - + 90 ° C.
  • allowed gasket at temperatures below 0 ° C.
  • minimum bending radius of 25 outer diameters for single-wire cores and 15 for stranded.
  • The resistivity of conductors for 1km length at a temperature of + 20 ° C is not less than 29.11 ohms for single-wire veins, and not less than 29.4 ohms for stranded.
  • Specific insulation resistance of 1 km length at the temperature of + 20 ° C is not less than 100 megohms for ASB cable designed for voltage of 1 kV and 200 MW for 6 and 10 kV.
  • service life of 30 years.

Such specifications ASB cable as the weight and outer diameter, we examined in detail in the table:

Table cross sections

Scope

main purpose of ASB cable - transmission of electric energy in stationary installations electric systems with a working voltage of 1, 6 and 10 kV.Armored conductor may also be used for power transmission in networks with direct current.The most common type of ASB power cable used in wiring, in the ground.


draw your attention to the fact that the soil should have a low or high corrosion activity when applying stamps and ASB ASBl.At high corrosiveness must use brand ASB2l.This is the main difference between multiple cable types.

important condition for operation of the conductor - when laying there should be no stray currents in the ground, and the cable must not be subjected to stretching.See how to pave the wire, you can in the video below:

Laying in the ground

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most popular of different sized power cable ASB is 3x70;3h95;3h120;3x150;3h185;3h240 ;.If you are looking for a conductor analog is better to choose the brand with names like TSASB or ASBShv.

As for manufacturers, the most reliable to date, considered these plants manufacturers as of "Kamkabel", JSC "Kavkazkabel", JSC "Plant Moskabel" and LLC "GC" Sevkabel ".

Prepared site http://vse-elektrichestvo.ru/

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