Overhead cables with aluminium alloy

Overhead cables with aluminium alloy conductor and XLPE insulation, for overhead power transmission lines up to 35 kV

DESIGN

Conductor: stranded of aluminium alloy wires of round form, compacted, round form.
Insulation: pressed of light-stabilized cross-linked polyethylene (XLPE) of black colour. Nominal thickness of wires’ insulation under 20 kV is 2,3 mm, under 35 kV – 3,5 mm. Lower maximum deviation from nominal thickness of insulation equals to (0,1+0,1xδn) mm, where δn – nominal insulation thickness. Upper maximum deviation hasn’t any standard.

APPLICATION

Cables are applied in the aerial electric networks under the voltage of 20-35 kV.

TECHNICAL CHARACTERISTICS

Cables are stable against the environment temperature: from -60°C to +50°C.

Cables are stable against the assembling bends and solar radiation.

Cable assembling should be executed at the environment temperature of not below than – 20°C.

Cable bending radius at the assembling and installed on the cable supports is not less than 10 wire diameters.

Insulation resistivity at the maximum permissible temperature of conductors heating is not less than 1×10¹² Ohm · sm.

Insulation breakdown voltage after being in water during 1h at the temperature of + (20±5)°C is not less than 24 kV with frequency of 50 Hz.

Permissible conductors heating at the operation should not exceed +90°C in normal operation regime and +250°C –at the short-circuit current.

ACSR (20/33 kv)
Tensil Strength	Elictical Resistance at 30^oC	Approx. weight	Conductor Diameter (Comopacted)	Cover Thickness	Conductor structure		Conductors
Tensil Strength	Elictical Resistance at 30^oC	Approx. weight	Conductor Diameter (Comopacted)	Cover Thickness	Al	St
N	Ω/km	kg/km	mm	mm	Nxmm	Nxmm
11400	0.9077	194	11.75	2.3	6×2.59	1×2.59	Weasel
13200	0.7827	219	12.31	2.3	6×2.79	1×2.79	Fox
20590	0.4541	342	14.7	2.3	6×3.66	1×3.66	Mink
28700	0.2733	454	16.52	2.3	6×4.72	7×1.52	Otter
65500	0.1860	831	21.46	2.3	30×2.59	7×2.59	Wolf
38860	0.2712	562	18.3	2.3	7×4.39	7×1.93	Hyena
AAC (0.6/1 kv)
4200	1.181	97	8.70	1.2	7×2.10		25
5700	0.833	130	9.90	1.2	7×2.50		35
8400	0.595	185	12.00	1.5	19×1.80		50
11300	0.437	241	13.50	1.5	19×2.10		70
15600	0.308	326	15.50	1.5	19×2.50		95
Copper (0.6/1 kv)
6900	1.138	163	7.10	1.00	7×1.70		16
9900	0.746	249	8.70	1.2	7×2.10		25
14000	0.526	345	9.90	1.2	7×2.50		35
19500	0.376	490	11.90	1.5	19×1.78		50
26900	0.276	657	13.50	1.5	19×2.10		70