SIP-3

Self-supporting single-core covered conductor for 6-20 kV overhead lines

SIP-3 is a self-supporting single-core covered conductor for medium-voltage overhead lines of 6, 10, 15 and 20 kV. The conductor is made of aluminium alloy with a protective covering of UV-stabilised cross-linked polyethylene. It is used in forested areas, where there is a high likelihood of contact with vegetation, and in polluted atmospheres. Designation breakdown: SIP – self-supporting insulated wire, 3 – covered, single-core.

Voltage 6 – 20 kV

Conductor Aluminium alloy

Cores 1 (covered)

Cross-section 35 – 240 mm²

Request a price Size table

SIP-3 PRODUCT RANGE

Full list of covered conductor cross-sections produced for 6-20 kV overhead lines to GOST 31946-2012.

Type / size	Cores	Cross-section, mm²	IEC equivalent	Outer Ø, mm	Weight, kg/km
SIP-3 1×35	1	35	SAX	12.2	115
SIP-3 1×50	1	50	SAX	13.7	162
SIP-3 1×70	1	70	SAX	15.4	222
SIP-3 1×95	1	95	SAX	17	295
SIP-3 1×120	1	120	SAX	18.6	365
SIP-3 1×150	1	150	SAX	20.2	450
SIP-3 1×185	1	185	SAX	22.5	560
SIP-3 1×240	1	240	SAX	24.8	720

Outer diameter and weight are given as typical values per GOST 31946-2012. Exact TCG factory parameters – see the product datasheet.

SIP-3 wire description

SIP-3 is a self-supporting covered conductor for medium-voltage overhead power lines of 6, 10, 15 and 20 kV (sometimes up to 35 kV). Single-core design with an aluminium alloy conductor in a protective covering of UV-stabilised cross-linked polyethylene.

The main difference from the classic bare conductors A and AS is the protective covering, which withstands brief contact with tree branches without a short circuit. This radically reduces the number of emergency outages in forested areas and during hurricane-force winds. In polluted atmospheres (industrial dust, coastal salinity, chemical emissions – types II and III per GOST 15150), the covering protects the conductor from corrosion and reduces leakage losses through the insulators.

SIP-3 differs from SIPst-3 in the design of the conductor: SIP-3 has an ordinary Al alloy conductor, while in SIPst-3 the Al wires are reinforced with a steel wire for long spans.

Applications

Trunk overhead lines of 6, 10, 15 and 20 kV

Branch lines from medium-voltage overhead lines

Overhead lines in forested areas and areas with vegetation

Overhead lines in polluted atmospheres (types II and III per GOST 15150)

Replacement of bare conductors A and AS on existing overhead lines

Construction

Conductor

Stranded, compacted, made of 6201 aluminium alloy.

Protective covering

UV-stabilised cross-linked polyethylene (XLPE). Black, resistant to UV and to contact with vegetation.

SIP-3 cross-section – single-core conductor with a protective XLPE covering

Technical specifications

Rated voltage 6 / 10 / 15 / 20 kV

Conductor material Aluminium alloy 6201

Conductor class Stranded, compacted

Protective covering UV-stabilised cross-linked polyethylene (XLPE)

Number of cores 1

Cross-sections 35 – 240 mm²

IEC equivalent SAX

Standard GOST 31946-2012

Detailed specifications – see the TCG datasheet

Operating conditions

Installation temperature not below -20°C

Operating temperature -60°C … +50°C

Max. conductor t° (continuous) +90°C

Max. conductor t° (short circuit) +250°C

Min. bending radius 10 × Ø

Atmosphere type types II, III (GOST 15150)

Service life at least 40 years

Warranty 5 years

Climatic category UHL

SIP-3