SIP-5ng (AsXSn) – self-supporting insulated wire with an aluminum conductive core, insulated from a flame retardant polymer composition, thermoplastic, light-stabilized cross-linked polyethylene. The insulating material is highly resistant to sunlight, (ultraviolet) and ozone.
The carrier is missing. The design of the wire is a bundle of conductive and zero conductors of the right direction with a twisting pitch of no more than 450 mm. The operating voltage of the self-supporting insulated wire is up to 0.6 kV / 1 kV with a frequency of up to 50 Hz. SIP wires are never copper. Its minimum cross-section starts from 16 mm2. The price of the self-supporting insulated wire depends on the cross-section.
The most common sizes of wire cross-section for connection in SIP power grids are 2×25, 4×16, 4×25, 4×35, 4×50, 4×70, 4×95.
Compared to bare power lines (for example, aluminum AC wire), self-supporting insulated wire has a sufficient number of advantages:
– Due to solid insulation, phase-to-phase short circuits and subsequent wire breaks are excluded. Accordingly, on the line there will no longer be such a sad picture as numerous crossings in the spans;
– you can use supports of smaller overall dimensions, for example, instead of the SV-110 and SV-95 supports, take the SV-85 racks. Or even use wooden ones;
– the distances from the self-supporting insulated wire to buildings and structures are reduced in comparison with bare wires, respectively, there are more options for using power lines in dense residential buildings;
– lower losses during transmission of electricity due to low inductive resistance;
– the possibility of laying self-supporting insulated wire on the facades of buildings;
The main characteristic of the insulating material is that it does not support combustion. The SIP-5ng wire in most of its characteristics corresponds to the AsXSn wire produced on European equipment. It is used, similarly to other SIP wires, in the construction of power transmission lines and overhead electric mains.
Twisting: insulated conductive conductors are twisted with a twisting pitch of not more than 45 cm. The twisting has a right direction.
Core material: round aluminum, multi-wire sealed. The wire is made with a cross section of 16-120 mm2. In this case, if the nominal cross-section does not exceed 25 mm2, a right-sided twisting is used, for large sizes – a left-sided one.
Core: steel wire
Insulation: light-stabilized cross-linked polyethylene, non-combustible silane-crosslinkable composition based on a copolymer of polyethylene with vinyl acetate.
Deciphering SIP-5ng (AsXSn):
What does the abbreviation SIP mean? This abbreviation stands for –
S – self-supporting
I – isolated
P – wire (it’s a wire, not a cable as some people mistakenly call it)
ng – not supporting combustion
AsXSn abbreviation in the interpretation of the European version – self-supporting wire (s) with aluminum conductors (A), insulated from “XLPE” resistant to ultraviolet radiation (XS) and flame retardant (n)
Application and installation of self-supporting insulated wire:
Self-supporting insulated wires are used for the installation of overhead power lines and branches to the inputs to residential buildings, outbuildings, for laying branches of main power lines that were laid through the air, and for their modernization. With their help, industrial enterprises or private consumers are connected to electricity with which it is possible to easily organize the input of electricity in the country or in a private house. In addition, this conductor is used for outdoor lighting. Installation can be carried out on the walls of buildings, engineering structures, and in addition, on the supports of existing wires. A line made of such a wire can go along the walls and facades of buildings, both industrial and residential. Possessing high thermal stability (from -60°C to +50°C), SIP wire is most often used in regions with cold and temperate climates and can last up to 25 years.
Features of laying and installation of self-supporting insulated wire:
Laying the wire does not require any special skills. With the help of fittings for the installation of self-supporting insulated wire, almost any person can cope with this. We will provide a superficial overview of the installation of a self-supporting insulated wire. Anchor fasteners are installed on the support with special metal clips, which will hold special clamps. The self-supporting insulated wire is installed on the supports by the pulling method, pre-roll rollers are installed on the posts, with a protective layer of plastic, which prevent damage to the insulation of the pulled cable, and it is stretched by a lead rope, wound from the coil. During installation, drag on the ground and tree branches should be avoided. Using a dynamometer, set the permissible line tension. After that, the wire is fixed in the spans. Docking and branching of the line is made by sealed clamps. Electrical contact is made by piercing the protective layer with thorns. The connection can be carried out under voltage, the design of the piercing clamp allows this procedure to be performed safely.
– The minimum horizontal distance from the self-supporting insulated wire to the elements of the nearest buildings and structures with the greatest deviation:
– to balconies, terraces, windows 1.0 m;
– up to blank walls 0.15 m;
– The minimum vertical distance when passing over the roofs of buildings:
– for industrial buildings and structures 2.5 m;
– for small architectural forms (trade pavilions, kiosks, etc.) 0.5 m;
– Minimum distance when passing along the wall of a building
– 0.3 m above the window or entrance doors;
– above a window or balcony 0.5 m;
– to the ground 2.75 m
– up to windows 0.5 m;
– up to balconies and entrance doors 1.0 m;
– The minimum distance in the gap from the wall of the building to the self-supporting insulated wire is 6 cm;
Permissible current loads of the SIP-5 wire, as well as permissible one-second short-circuit currents in the table below.
|Nominal conductor cross-section, mm2||Permissible load current for networks with a voltage of 0.6 / 1 kV, A, no more||Allowable one-second short-circuit current. kA, no more|
|Permissible heating temperature of current-carrying conductors during overload mode (up to 8 hours per day)||130°С|
|Permissible heating temperature of current-carrying conductors in case of short circuit with short circuit current flow up to 5 seconds||250°С|
|Operating temperature||от -60 °С до +50 °С|
|Minimum wire laying temperature||-20 °С|
|Long-term permissible core heating temperature||+90 °С|
|Minimum bending radius when laying||10 wire diameters|
|Minimum service life||25 years|
|Wire nomenclature||Nominal conductor diameter, mm||Outer wire diameter, mm||Estimated weight of 1 km of wire, kg||Minimum breaking strength of load-bearing conductors, kN, not less||Nominal insulation thickness, mm|
|Wire SIP-5ng 2×16||4,8||16,8||138,1||5||1,2|
|Wire SIP-5ng 4×16||4,8||20,2||276,2||9,8||1,2|
|Wire SIP-5ng 4×25||6||23,4||400,5||15,4||1,2|
|Wire SIP-5ng 4×35||7||26,1||521,2||21,5||1,2|
|Wire SIP-5ng 4×50||8,4||30,9||730,8||30,7||1,4|
|Wire SIP-5ng 4×70||9,8||34,6||983,1||43||1,6|
|Wire SIP-5ng 4×95||11,6||39,9||1304,6||58,4||1,7|
|Wire SIP-5ng 4×120||13||43,6||1624,4||73,7||1,7|
If necessary, we carry out the production of wires to order, a special nomenclature range, which is not included in the standard list of products. It is possible to buy self-supporting wire SIP-5ng (AsXSn) at an affordable price in bulk from the factory of the manufacturer of cable products MPKA.