SIP-3 Cable Description

SIP-3 is a self-supporting, single-core, high-voltage wire. The conductor is made of aluminum. Light stabilized XLPE insulation. The insulation is absolutely UV and ozone resistant. Does not lose its protective qualities during the entire operational period. The main difference between the SIP-3 cable and other types of insulated wire is the voltage for which it is designed. That is, wires for example SIP-4 or SIP-5 type are used in networks with a voltage of 0.66 / 1 kV, then type 3 – at a voltage of 20 or 35 kV. This voltage must be indicated in the marking of the wire.

SIP-3 Cable Application

For use in overhead power transmission lines for alternating voltage of 20 kV (used for lines for voltages of 10, 15 and 20 kV) and 35 kV (for lines for voltage 30 kV and 35 kV) with a nominal frequency of 50 Hz. Basically, the most demanded cross-sectional sizes of 20 and 35 kV in the SIP-3 wire are 1 × 35, 1 × 50, 1 × 70, 1 × 95, 1 × 120, 1 × 150, 1 × 185, 1 × 240, the price naturally depends from the section, the larger the square, the higher, since more aluminum is used in the production of this SIP.

SIP-3 (AAsXS) are self-supporting insulated wires with a conductor made of aluminum alloy and insulation made of light-stabilized cross-linked polyethylene.
SIPn-3 (AAsXSn) are self-supporting protected wires with a conductor made of aluminum alloy and insulation made of light-stabilized cross-linked polyethylene, which does not spread combustion.
They are designed for overhead power transmission lines with a rated voltage of 20 kV (for networks with a voltage of 10, 15 and 20) kV and 35 kV (for networks with a voltage of 35 kV) with a rated frequency of 50 Hz.

CONSTRUCTION :

SIP-3 Cable Construction

1 | Bare alloy aluminium conductor (AlMgSi), round stranded compressed (RM). Longitudinally watertight by dry filling.
2 | Core insulation (XLPE, black, UV resistant)

Deciphering SIP-3:

S – self-supporting;

I – insulated;

P – wire.

SIP-3 – with protective insulation;

n – does not support combustion.

A – aluminum conductor;

s – self-supporting wire;

XS – XLPE insulation;

n – does not support combustion.

SPECIFICATION :

Specifications
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

PARAMETER :

20kV SIP-3 Parameter

Number of Cores Cross Section	Nominal thickness of phase insulation	Overall Diameter	Weight	Maximum Conductor Resistance
No.×mm2	mm	mm	Kg/Km	Ω/Km
1x35	2.3	12	165	0.986
1x50	2.3	13	215	0.720
1x70	2.3	15	282	0.630
1x95	2.3	16	364	0.363
1x120	2.3	18	445	0.288
1x150	2.3	19	540	0.236
1x185	2.3	21	722	0.188
1x240	2.3	24	950	0.145

35kV SIP-3 Parameter

Number of Cores Cross Section	Nominal thickness of phase insulation	Overall Diameter	Weight	Maximum Conductor Resistance Ω/Km
No.×mm2	mm	mm	Kg/Km	Phase
1x35	3.5	14	209	0.986
1x50	3.5	16	263	0.720
1x70	3.5	17	334	0.630
1x95	3.5	19	421	0.363
1x120	3.5	20	518	0.288
1x150	3.5	22	618	0.236
1x185	3.5	24	808	0.188
1x240	3.5	26	1045	0.145