Application:

290/500kV HV cables fall into the category of EHV XLPE insulated power cables. As a core product for 500kV EHV power transmission networks, they replace overhead lines of the same voltage class for underground/tunnel laying in urban power grids, industrial parks and cross-regional transmission projects. Featuring large transmission capacity, excellent insulation, strong anti-environmental interference and small floor space, they are widely used in overhead-to-underground transformation of main power grids, cross-sea/river transmission and power grid construction in urban core areas.

Construction:

1.Conductor: Circular Stranded Compacted Conductor(≤800mm2)，Milliken Conductor(＞800mm2)

2.Conductor Screen:Super Smooth Semi-Conductive Compound

3.Insulation: Super Clean Cross Linked Polyethylene(XLPE)

4.Insulation Screen:Super Smooth Semi-Conductive Compound

5.Binder Tape:Semi-Conductive Tape

6.Metal Sheath: Corrugated Aluminum Sheath/Lead Sheath/Aluminum Laminated Tape

7.Anti-Corrosive Layer:Cable Asphalt

8.Outer Sheath: Polyvinyl Chloride(PVC) or Polyethylene(PE)

9.Conductive Layer: Graphite

10.Optional: Copper Wire Screen,Metal Wire Screen 

Technical Parameters

Rated Voltage:290/500KV
YJLW03:CU/XLPE/CAS/HDPE                         YJLW02:CU/XLPE/CAS/PVC
Nominal area of conductor	mm²	800	800*	1000	1200	1400	1600	1800	2000	2200	2500
Thickness of insulation	mm	34.0	34.0	33.0	33.0	32.0	32.0	31.0	31.0	31.0	31.0
Thickness of aluminum tape	mm	2.9	2.9	3.0	3.0	3.0	3.1	3.2	3.2	3.2	3.3
Thickness of outer sheath	mm	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0	6.0
Approx.outer    diameter	mm	148.0	148.4	150.8	154.2	155.2	158.7	159.6	162.6	166.1	169.0
Approx.weight    ( kg/km)	Cu	21520	21600	23786	25793	27592	29956	31707	34060	36061	39503
Max.DC resistance of conductor  at 20℃(Ω/km)	Cu	0.0221	0.0221	0.0176	0.0151	0.0129	0.0113	0.0101	0.0090	0.0083	0.0072
Current ratings(A)
Soil ∴	Cu	962	1001	1119	1201	1287	1361	1425	1486	1530	1596
Air ∴	Cu	1248	1301	1486	1613	1753	1878	1991	2101	2188	2306
Soil … ·	Cu	1050	1090	1208	1285	1366	1431	1490	1540	1572	1624
Air ··	Cu	1246	1297	1468	1587	1714	1824	1923	2015	2086	2183