- How to decode
- Construction
- Layout conditions
- Scope
- Manufacturers
How is decoded
First of all it should be noted that the decoding of the SIW marking is as follows:
- C - self-supporting;
- AND - isolated;P - wire.
We draw your attention that according to the abbreviation this is still a wire, not a cable, as many believe.
I would also like to note that the prefix "A" at the end of the marking( for example, SIP-1A), indicates that the zero core is covered with insulation. The prefix "n" in turn means that the current-carrying veins are made of aluminum alloy, and the letter "t" at the end of the mark indicates that the insulation is resistant to high temperatures + 90 ° С( for a short time + 120 ° С).
Construction of
Before considering the design of the CIP wire, I would like to say that today there are the following conductor grades: SIP-1, -1A, -2, -2A, -3, -3, -4, -5.We will provide the types and differences of each brand now.
SIP-1 is produced for 380 V networks. It is a four-wire cable made of aluminum or aluminum alloy, three cores are covered with light-resistant polyethylene, resistant to ultraviolet radiation, and the fourth one without a braid with a steel core, serves as a carrier and neutral.
In SIP-2, all the wires are insulated, carrying, including.
SIP-3 is a single-core steel-aluminum cable with a jacket of cross-linked light-stabilized polyethylene.
All four cores are insulated with thermoplastic light stabilized polyethylene, but there is no carrier of a separate core.
SIP-5 also has no separate carrier core, the rest are covered with a jacket of cross-linked polyethylene, the number of strands is two or more.
According to the technical characteristics of SIP-1, SIP-2, SIP-4 and SIP-5 are rated for rated voltage up to 1 kV, SIP-3 up to 35 kV.
Of the remaining parameters I would like to highlight:
- operating temperature range from -60 to + 50 ° C;
- climatic modification of UHL( moderately cold climate);
- line installation is possible at -10 degrees Celsius;
- warranty period of operation 5 years;
- declared service life is not less than 45 years.
For more information on SIP characteristics such as minimum bending radius, resistance, current load, mass and cross-section, see tables:
Laying conditions
The wire laying does not require special skills. With the help of accessories for laying and installation, almost anyone can learn this by reading the rules.
Provide a superficial overview of the installation of a self-supporting insulated wire. On the support with special metal clips are installed anchorages for the anchors, which will hold special clamps. The self-supporting insulated wire is supported by the pulling method, pre-rollers are installed on the poles, with a protective layer of plastic to prevent damage to the insulation of the cable being dragged and unwound from the coil in advance by the lead rope.
During installation, it is necessary to avoid dragging on the ground and tree branches. With the help of a dynamometer, set the permissible tension of the line. After that, the wire is fixed in the spans. Docking and branching of the line is done by hermetic clamps. Electric contact is made by piercing the protective layer with spikes. The connection can be carried out under voltage, the clamp design allows to carry out this procedure safely.
The process of installing the CIP wire is described in detail in the video below:
Scope of application
As we said above, self-supporting insulated wire is used in networks up to 35 kV.Most often it is used in highways of overhead power lines, as well as for a branch from a high-voltage line to the entry into buildings. If you want to conduct electricity to the site, in this case you will just need a SIP wire, through which you can organize the input at the cottage or in a private house. In addition, this conductor is used for outdoor lighting.
By the way, there are SIP analogues. For example, the analog of SIP-1 is the Finnish conductor AMKA.Instead of SIP-2, you can use the French Torsad wire. The analog of SIP-3 is another Finnish conductor - SAX or Polish PAS-W.Well and that, concerning marks СИП-4 / СИП-5, they can be replaced with the wires developed under the Swedish technology - EX Four Core ALUS or Polish AsXsn.
Manufacturers of
The last thing I would like to talk about when considering the technical characteristics of the SIP wire - which manufacturers are the most qualitative for today. Of the domestic manufacturers of manufacturers the most high-quality products are as follows:
- LLC "Kamsky cable";
- OJSC Rybinskkabel;
- LLC "GC" Sevkabel ";
- ZAO Moskabel Plant.
Using the products of these manufacturers the chance to get on a fake or a poor-quality conductor is very small. However, if you doubt that the product mark chosen by you corresponds to GOST, we recommend performing a simple check - to determine the cross section of the cable by the diameter of the core.
That's all I wanted to tell you about the technical characteristics of the CIP wire, as well as its types and differences. We hope that the information provided was useful to you!
It will be useful to read:
- How to make a branch from a wire
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