APPLICATION of 150 Kv Underground Cables
These
150kv underground cables are designed for distribution of electrical power with nominal voltage 127/220kV. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations.
STANDARD of 150 Kv Underground Cables
IEC 62067
CONSTRUCTION of 150 Kv Underground Cables
Conductor: The cable conductors can be made of copper or aluminium, depending on customer’s preference or current carrying capacity. Large size solid conductors are made of aluminium. Available construction including: round solid conductors up to 2000mm² (RE); circular stranded compacted conductors up to 1200mm² (RM); circular conductors with shaped wires up to 2000mm² (RM, Keystone conductors); segmental conductors up to 2500 mm² (RMS, Milliken conductors); oval shaped stranded compacted conductors up to 800mm² for external gas pressure cables (OM).
Conductor Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely.
Insulation: Insulation is of cross-linked polyethylene compound XLPE.
Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied over the insulation.
Metallic Layer: The metallic layer may be applied over the core assembly collectively. The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires.
Separation Sheath: Aluminum Tape sheath
Outer Sheath: PE
CONSTRUCTION PARAMETER of 150 Kv Underground Cables
Nom. Cross-Section
Nom. Insulation
Copper Wire Screen
Approx. Overall
Approx. Weight
Area
Thickness
Area
Diameter
CU
AL
mm²
mm
mm²
mm
kg/m
240
25
50
83
7.4
5.9
300
24
50
83
8
6.1
400
22
50
82
8.6
6.2
500
22
50
86
9.9
6.8
630
22
50
90
11.4
7.5
800
19
50
88
12.5
7.5
1000
19
110
98
16
10
1200
18
110
100
18
10.6
1400
18
110
103
20
11.4
1600
18
110
108
22
12.4
1800
19
110
113
25
13.6
2000
19
110
116
27
14.5
2500
19
110
123
32
16.6
ELECTRICAL PROPERTIES of 150 Kv Underground Cables
Current Ratings/Power Ratings(continuous load)
Nom. Cross-
DC
AC
Capacitance
Inductance
Section
Resistance @20°C
Resistance @90°C
per core
Cu conductor
Al conductor
Area
Cu
Al
Cu
Al
1 circuit
2 circuits
1 circuit
2 circuits
mm²
Ω/km
Ω/km
Ω/km
Ω/km
µF/km
mH/km
A/MVA
A/MVA
trefoil installation
240
0.0754
0.125
0.0973
0.161
0.106
0.49
423/161
357/136
333/127
282/107
300
0.0601
0.1
0.0781
0.129
0.116
0.47
470/179
396/151
372/142
314/120
400
0.047
0.0778
0.0618
0.101
0.133
0.44
524/200
440/168
420/160
352/134
500
0.0366
0.0605
0.0492
0.0791
0.143
0.42
584/223
489/186
473/180
396/151
630
0.0283
0.0469
0.0393
0.0622
0.155
0.41
648/247
540/206
531/202
443/169
800
0.0221
0.0367
0.0326
0.05
0.187
0.38
702/267
582/222
587/224
487/186
flat installation
1000
0.0176
0.0291
0.0232
0.0375
0.215
0.56
989/377
857/327
782/298
678/258
1200
0.0151
0.0247
0.0201
0.0319
0.236
0.55
1060/404
917/349
849/324
734/280
1400
0.0129
0.0212
0.0175
0.0275
0.248
0.53
1136/433
981/374
915/349
790/301
1600
0.0113
0.0186
0.0156
0.024
0.26
0.52
1201/458
1035/394
979/373
844/322
1800
0.0101
0.0165
0.0142
0.0213
0.26
0.51
1253/477
1080/412
1035/394
892/340
2000
0.009
0.0149
0.0129
0.0193
0.27
0.5
1308/498
1126/429
1086/414
935/356
2500
0.0072
0.0119
0.0109
0.0156
0.294
0.47
1406/536
1207/460
1201/458
1031/393
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