Self-Bearing Insulated Wires for Air Suspension

SIP-1, SIP-2, SIP-1À, SIP-2À Technical Specifications 16.Ê17.268-98

Self-bearing wires with insulated conductors are intended for overhead transmission lines and taps to wires inside residential buildings, household outbuildings for the voltage 0.6/1 kV.

	Section, mm2
SIP-1 SIP-1À	1õ16,0 +1õ25,0	3õ16,0 +1õ25,0	3õ25,0 +1õ35,0	3õ35,0 +1õ50,0	3õ50,0 +1õ50,0	3õ50,0 +1õ70,0	-	-
	3õ70,0 +1õ70,0	3õ70,0 +1õ95,0	3õ95,0 +1õ70,0	3õ95,0 +1õ95,0	4õ16,0 +1õ25,0	4õ25,0 +1õ35,0	-	-
SIP-2	1õ16,0 +1õ25,0	1õ25,0 +1õ35,0	1õ35,0 +1õ35,0	3õ16,0 +1õ25,0	3õ25,0 +1õ35,0	3õ35,0 +1õ35,0	3õ35,0 +1õ50,0	3õ35,0 +1õ50,0
	3õ50,0 +1õ50,0	3õ70,0 +1õ70,0	3õ70,0 +1õ95,0	3õ95,0 +1õ70,0	3õ95,0 +1õ95,0	4õ16,0 +1õ25,0	4õ25,0 +1õ35,0	3õ25,0 +1õ35,0 +1õ25,0
	3õ35,0+1õ35,0+1õ25,0		3õ50,0+1õ50,0+1õ25,0		3õ70,0+1õ70,0+1õ25,0		-
SIP-2À	1õ16,0 +1õ25,0	2õ16,0	2õ25,0	3õ16,0 +1õ25,0	3õ25,0 +1õ35,0	3õ35,0 +1õ50,0	3õ50,0 +1õ50,0	-
	3õ50,0 +1õ70,0	3õ70,0 +1õ70,0	3õ70,0 +1õ95,0	3õ95,0 +1õ70,0	3õ95,0 +1õ95,0	4õ16,0 +1õ25,0	4õ25,0 +1õ35,0	-

Structure

- A conductor is made of aluminium and has a circular shape, solid conductors have a section of 16 mm, stranded conductors have other sections, the number of wires in a phase conductor and their electrical resistance are shown in the table below:

Nominal Section of a Phase Conductor, ìì2	Number of wires in a conductor, pieces	Electrical Resistance of a Phase Conductor of 1 km Long to a Direct Current of No More Than, Ohm
16,0	1	1,910
25,0	7	1,200
35,0	7	0,868
50,0	7	0,641
70,0	7	0,443
95,0	7	0,320

- A bearing zero conductor is uninsulated for SIP-1 and SIP-2, insulated for SIP-1À and SIP-2À, made of aluminium alloy, has a circular shape, is compacted, reinforced with a steel wire:

Nominal Section of a Zero Bearing Conductor, mm2	Number of Wires in a Conductor, Pieces		Electrical Resistance of a Zero Bearing Conductor of 1 km Long to a Direct Current of No More Than, Ohm
	Aluminium	Steel
25,0	6	1	1,380
35,0	6	1	0,986
50,0	6	1	0,720
70,0	6	1	0,493
95,0	6	1	0,363

- The insulation of SIP-1 and SIP-1À is made of light-stabilized thermoplastic polyethylene, the insulation of SIP-2 and SIP-2À is made of light-stabilized cross-linked polyethylene.

Technical characteristics

- The climatic performance of wires is NF, categories of arrangement 1, 2, 3 in accordance with GOST 15150-69.
- Wires are resistant to the action of the solar radiation, which can be characterized by the integrated heat flux density of 1120 W/m2±10%, including density of ultraviolet spectrum.
- Wires are resistant to bending at a temperature of -40°Ñ
- Wire installation and wiring work must be carried out at an ambient temperature of not below -20°Ñ
- Allowable effort in a zero conductor at tension and at exploitation is no more than 45 N/mm2
- Insulated wire conductors stand a test by the alternating voltage of 3.5 kV, frequency of 50 Hz for transmission
- Wires, after being exposed in water at a temperature of 20±10°Ñ for not less than 10 minutes,
stand a test of the alternating voltage with frequency of 50 Hz during 5 mines, which is:
2.5 kV for wires of the marks SIP-1 and SIP-1À
4.0 kV for wires of the marks SIP-2 and SIP-2À
- Wires stand a test of the alternating voltage of 4.0 kV, frequency of 50 Hz, within 1 hour
- The permissible heating temperature of conductors at exploitation must not exceed the following values:
for SIP-1 and SIP-1À: 70°Ñ at a normal mode
80°Ñ at overload conditions of 8 hours per day or less
135°Ñ at a short circuit with short circuit current flow during 5 sec
for SIP-2 and SIP-2À: 90°Ñ at a normal mode
130°Ñ at overload conditions of 8 hours per day or less
250°Ñ at a short circuit with short circuit current flow during 5 sec
- A factory wire length must be agreed while ordering
- A guaranty service life is 3 years from the date of putting cables into operation
- A lifetime of wires is 25 years