Trunk overhead line
Self-supporting insulated wire with an insulated neutral messenger
SIP-2 is a self-supporting insulated wire with three insulated conductors made of aluminium wires and an insulated neutral messenger made of aluminium alloy (6201). The insulation of all cores is UV-stabilised cross-linked polyethylene. It is used for trunk overhead power lines of 0.6/1 kV. The most widespread SIP type in Uzbekistan. Designation breakdown: SIP – self-supporting insulated wire, 2 – with an insulated neutral messenger.
Full list of cross-sections produced to GOST 31946-2012.
| Type / size | Cores | Neutral cross-section, mm² | IEC equivalent | Outer Ø, mm | Weight, kg/km |
|---|---|---|---|---|---|
| SIP-2 3×16+1×25 | 3+1 | 25 | AXKA | 19 | 220 |
| SIP-2 3×25+1×35 | 3+1 | 35 | AXKA | 21.5 | 310 |
| SIP-2 3×35+1×50 | 3+1 | 50 | AXKA | 24 | 420 |
| SIP-2 3×50+1×54.6 | 3+1 | 54.6 | AXKA | 26.5 | 540 |
| SIP-2 3×70+1×70 | 3+1 | 70 | AXKA | 28.5 | 720 |
| SIP-2 3×95+1×70 | 3+1 | 70 | AXKA | 30.5 | 860 |
| SIP-2 3×120+1×95 | 3+1 | 95 | AXKA | 34 | 1080 |
| SIP-2 3×150+1×95 | 3+1 | 95 | AXKA | 36.5 | 1250 |
SIP-2 is the classic self-supporting insulated wire for trunk overhead power lines at 0.6/1 kV. It is the most widely used SIP type in Uzbekistan and the CIS. Construction: three phase conductors made of aluminium wires, stranded around an insulated neutral messenger made of 6201 aluminium alloy (AlMgSi). All cores are covered with UV-stabilised cross-linked polyethylene, resistant to UV and weathering.
The main difference from SIP-1 is the insulation on the neutral core, which improves safety during maintenance and allows installation along building facades. It differs from SIPst-2 in that the neutral core is made of ordinary Al alloy, without reinforcement by a steel wire – this is simpler and cheaper, but with lower mechanical strength (short spans).
Phase conductors (3 pcs)
Stranded, compacted, made of aluminium wires.
Insulated neutral messenger
Stranded, made of aluminium alloy (6201 AlMgSi). Carries the mechanical load of the entire wire.
Insulation
UV-stabilised cross-linked polyethylene (XLPE), black. Resistant to UV and weathering.
Stranding
The three phase cores are stranded around the insulated neutral messenger.
SIP-2 cross-section – 3 phase cores + insulated neutral messenger made of Al alloy
Detailed specifications – see the TCG datasheet
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