Aluminum self-supporting cable has been widely welcomed and used in Iran's electricity networks over the past few years.. This cable has many advantages, but non-compliance with technical issues in its use and operation can cause problems because the conductivity of aluminum is lower than copper and therefore has higher losses..
The increase in the use of wire and cable sprayers in the electricity and construction industry in the world, as well as the exponential increase in copper prices and, consequently, the increase in wire and cable prices, has reduced the production of this type of cable and created irrational competition in their market..
Aerial self-supporting cable It was first used in 1955 in France. Self-supporting aluminum cables can be used in the distribution and transmission of electricity with normal voltages from substations in each area, household, industrial and agricultural power supply..
Aluminum self-supporting cable structure
Hadi sex and class:
Aluminum wire, aluminum alloy or high carbon galvanized steel according to national standard
IEC 60228) SECRET 3084)
Insulation material:
XLPE blend
technical specification
Self-supporting aluminum cables with XLPE insulation
Nominal voltage
0.6/1kV
Aluminum self-supporting cable reference standard
Instructions for determining the requirements, technical evaluation criteria and tests of low voltage self-supporting cables of Tavanir Company.
Kabul Code
A2X-T
ABC*
5 field: Three-phase phase + A string of lighting + A messenger and zero
6 field: Three-phase phase + A string of lighting + A null string + An instant messenger
(Aerial twisted cables) ABC: Aerial bundled cables*
The standard basis for abbreviations in power cables |
In areas of large cities due to existence:
- The urban fabric is dilapidated and there are very narrow and non-standard passages
- Lack of space and adequate space for aerial cable
- Rocky path for ground cabling and lack of facilities and difficulty of equipment and machinery
- In mountainous areas and outside the city
Electricity distribution companies use low voltage aluminum cables. One of the disadvantages of using aluminum cables is their cover..
Self-supporting cables Due to high losses, they increase the technical losses of the network and in general will lead to more loss of electrical energy..
But these losses compared to other benefits Self-supporting cables It is not considered very important. Of course, by accurately calculating the cross-section of the cable and observing the technical issues, it is possible to reduce these technical losses of self-supporting cables to some extent and eliminate this defect..
Another disadvantage of using these cables is the connection of the network and the copper wire to the self-supporting aluminum cable. The presence of these two metals together causes high corrosion and in a short period of time, this corrosion causes arching and power outage..
As we know, self-supporting cables have aluminum conductor and polyethylene cross-link insulation, and to install these cables on the bases, a support wire is needed. (massenger) This wire is made of steel for 20 KV cables and aluminum alloy for low pressure cables.. the door Low voltage self-supporting cable The retaining wire is also used as the neutral wire.
